Optical image stabilization device

Abstract

The application provides a transmission assembly, a supporting piece, an optical anti-shake device and electronic equipment. The transmission assembly and a transmission cantilever are designed separately, the transmission assembly is fixed in a plastic piece during integral injection molding, the number of assembly parts and process steps are reduced, the optical anti-shake stroke is enlarged, the optical anti-shake performance is improved, the transmission cantilever is no longer limited by the material and shape of the transmission assembly, the reliability of the transmission cantilever is improved, the assembly precision is further improved, the assembly difficulty is reduced, and the mass productivity of the optical anti-shake device is improved. In addition, the supporting piece is arranged on the transmission assembly, the problem of insufficient Z-direction stiffness of the transmission assembly is solved, the stable movement of the transmission assembly is ensured, and the performance of the optical anti-shake device is improved.

Description

Technical Field

[0001] This invention relates to the field of optical imaging, and more particularly to an optical image stabilization device for use in image sensors. Background Technology

[0002] When taking photos with a handheld portable smart device, physiological tremors of the human body are unavoidable. These physiological tremors cannot be overcome through training, causing the handheld portable smart device to inevitably shake with the human body when taking photos, resulting in a decrease in image quality. The most obvious manifestation is that the photos are blurry and unclear.

[0003] 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 parts after they are manufactured separately. The assembly precision and efficiency cannot meet the production requirements. At the same time, the shape and material of the transmission component make it lack rigidity 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 deterioration in the image stabilization effect. Summary of the Invention

[0004] The purpose of this invention is to provide an optical image stabilization device that can expand the optical image stabilization range, improve optical image stabilization performance, and simplify the assembly process.

[0005] This invention provides an optical image stabilization device for image sensors, comprising at least: a fixed component, a movable component, an actuating component, a transmission component, and a support member; the actuating component is mounted on the fixed component; the transmission component is mounted 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 transmission component to move the movable component, and the first displacement generated by the actuating component is less than the second displacement generated by the movable component, thereby increasing the optical image stabilization travel and improving the optical image stabilization performance; the support member is located on at least one side of the transmission component, and when the shape memory alloy wire is energized and tightened, the transmission component is in close contact with the housing or fixed component through the support member, which can improve the stability and reliability of the transmission component during movement.

[0006] Furthermore, at least a portion of the transmission assembly is covered with a plastic part on its outer side, and the transmission assembly and the plastic part are integrally molded. Injection molding of the transmission assembly reduces the number of parts, eliminates the step of stacking and fixing multiple parts together, reduces assembly difficulty, and improves reliability.

[0007] Furthermore, the optical image stabilization device also includes a transmission cantilever, the first end of which is connected to the first end of the transmission assembly, and the second end of the transmission assembly is connected to the moving assembly. The transmission cantilever and the transmission assembly are separate designs, meaning they are assembled as individual parts. Therefore, the material and shape of the transmission cantilever are not limited by the transmission assembly; that is, suitable materials and shapes can be selected according to actual needs.

[0008] Furthermore, the actuation component 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 component; the second end of the shape memory alloy wire is a fixed end, connected to the fixing component.

[0009] Furthermore, the actuation component also includes at least two clamping members: such as a first clamping member and a second clamping member; both ends of the shape memory alloy wire are fixed to the first clamping member and the second clamping member respectively; the first end of the shape memory alloy wire is connected to the transmission component through the first clamping member; the connection method between the first clamping member and the transmission component includes soldering, laser welding, conductive adhesive bonding or integral molding; the second end of the shape memory alloy wire is connected to the fixing component through the second clamping member, and the connection method between the second clamping member and the fixing component includes soldering, laser welding, conductive adhesive bonding or integral molding.

[0010] Furthermore, due to limitations in the shape or material of the transmission component, its stiffness in the direction perpendicular to the plane of the fixed component (i.e., the Z direction) is insufficient. Therefore, when the shape memory alloy wire is energized, the shape memory alloy wire will pull the transmission component, causing it to warp in the vertical direction. Therefore, providing a support member on at least one side of the transmission component can prevent warping from occurring.

[0011] Furthermore, when the shape memory alloy wire is not energized, the transmission component can reduce or avoid vibration in the Z direction through the support member on at least one side, thereby improving the stability and reliability of the transmission component.

[0012] Furthermore, in some embodiments, there is a height difference between the first clamping member and the second clamping member. When the shape memory alloy wire is energized, it generates an upward pulling force to tighten the transmission assembly. The transmission assembly can ensure that the transmission assembly is in close contact with the housing or fixing assembly through the support member on at least one side, thereby improving the overall stability.

[0013] 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; 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.

[0014] Furthermore, the connection method between the transmission cantilever and the moving component and / or the transmission component includes soldering, adhesive application, or riveting. The plastic part encasing the transmission component has a slot to place the transmission cantilever and support the end face of the transmission cantilever.

[0015] Furthermore, the contact area between the plastic part outside the transmission assembly and the support member has a recess to accommodate the support member, and the support member has a portion protruding from the surface of the transmission assembly after being placed into the recess.

[0016] Furthermore, when the actuation component drives the transmission component to move the moving component, the transmission component causes the support member to come into close contact with the housing, the base plate, or the fixed component, so as to improve the stability and reliability of the transmission component, i.e., to prevent it from warping.

[0017] Furthermore, the support member contacts the transmission assembly and / or the housing.

[0018] 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.

[0019] Furthermore, the transmission assembly includes at least: a first fixing part, a first connecting rod, and a second connecting rod fixed to the fixing assembly; the connection method between the first fixing part and the fixing assembly includes soldering, laser welding, or conductive adhesive bonding;

[0020] The 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 actuation 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.

[0021] Furthermore, at least one of the first connecting rod, the second connecting rod, or the transmission cantilever is a flexible connecting rod.

[0022] Furthermore, the flexible connecting rod may be in the shape of an elongated cantilever or a curved spring.

[0023] Furthermore, when the actuation component drives the transmission component, the second connecting rod of the transmission component will move together with the first connecting rod around the first fixed part as the axis, and at the same time drive the transmission cantilever to move together, thereby causing the moving component connected to the transmission cantilever to generate displacement.

[0024] Furthermore, when energized, 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 between the first connecting rod and the second connecting rod. 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 between the first connecting rod and the first fixed part, wherein the first displacement is less than the second displacement, thereby amplifying the anti-shake stroke.

[0025] Furthermore, the second displacement is at least 1.1 times the first displacement, and preferably, the second displacement can reach at least 1.5 times the first displacement.

[0026] Furthermore, the first fixing part or its outer plastic part is provided with a convex or concave limiting feature, and at least one of the first connecting rod, the second connecting rod or its outer plastic part is provided with a concave or convex limiting feature. The two limiting features cooperate to form a limiting structure, which is used to limit the movement range of the transmission component.

[0027] Furthermore, the fixed assembly has a plurality of the transmission assemblies, wherein the transmission cantilever of any two adjacent transmission assemblies does not contact each other.

[0028] Furthermore, the movable component is supported on the base plate by a support member; the movable component includes a first magnetic member, or has magnetic conductivity, or includes a first steel plate; the base plate includes a second magnetic member, or has magnetic conductivity, or includes a second steel plate; the movable component and the base plate are in contact with the support member by the attraction generated by the magnetic field.

[0029] Furthermore, the movable component includes a first magnetic component, or has magnetic conductivity, or includes a first steel plate; the outer shell includes a second magnetic component, or has magnetic conductivity, or includes a second steel plate; the magnetic attraction force between the first magnetic component and the second magnetic component ensures that the movable component is stably adsorbed onto the outer shell.

[0030] Furthermore, the support component includes a ball bearing, a column with a smooth surface, or a boss with a smooth surface that is integrally injection molded with the moving component; the material includes metal or ceramic, resin; the first magnetic component and / or the second magnetic component is a magnet.

[0031] Furthermore, the fixed component and the movable component together form a limiting function through plastic parts disposed on their exteriors, which is used to limit the maximum range of movement of the movable component.

[0032] Furthermore, 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.

[0033] Furthermore, the device also includes a resilient connection component;

[0034] The elastic connection component is arranged below the moving component and the fixed component, and includes at least one metal spring wire. The first end of the metal spring wire is connected to the moving component of the optical image stabilization device, and the opposite second end is connected to the fixed component of the optical image stabilization device. The metal spring wire can be used to conduct electrical signals, and each metal spring wire includes at least two metal layers with an insulating layer between each metal layer.

[0035] 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.

[0036] Furthermore, the mobile component is equipped with an image sensor chip.

[0037] The present invention also provides a camera module including the above-mentioned optical image stabilization device.

[0038] Furthermore, the present invention also provides a method for increasing the optical image stabilization travel, characterized in that it includes: by setting a transmission component, when the optical image stabilization device is in working state, driving the transmission component to move the moving component through an actuation component, so that the second displacement generated by the moving component is greater than the first displacement generated by the actuation component, thereby increasing the optical image stabilization travel and improving the optical image stabilization performance; wherein, the optical image stabilization device includes at least a fixed component, a moving component, a support member, the actuation component, and the transmission component; and a support member is provided on at least one side of the transmission component to maintain the stability and reliability of the transmission component.

[0039] Furthermore, the moving component can be connected to the actuating component via a transmission cantilever, and the transmission cantilever can be assembled as a separate part. The transmission cantilever can be made of suitable materials and shapes to improve its performance. The materials can be any one or more of gold, silver, copper, iron, aluminum, gold alloys, silver alloys, copper alloys, iron alloys, or aluminum alloys, and the shapes can be, for example, long rods, sheets, etc.

[0040] Furthermore, the transmission cantilever is connected to the moving component and / or the transmission component by means of soldering, gluing, or riveting.

[0041] 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.

[0042] Furthermore, at least a portion of the transmission assembly is wrapped with a plastic part on its outer side, and the transmission assembly and the plastic part are integrally formed; furthermore, the portion of the transmission assembly other than the first connecting rod is wrapped with a plastic part, and the portion is injection molded integrally with the plastic part, which can reduce the number of subsequent assembly parts.

[0043] Furthermore, a recess is provided in the contact area between the transmission assembly and the support member to accommodate the support member.

[0044] Furthermore, the support member has a portion protruding from the surface of the transmission assembly after being inserted into the recess, and when the actuation assembly drives the transmission assembly to move the moving assembly, the transmission assembly drives the support member to move to contact the outer shell to prevent the transmission assembly from warping.

[0045] Furthermore, depending on the working state of the transmission assembly, the support member is brought into contact with the transmission assembly and / or the housing. Furthermore, the support member is a smooth sphere or a smooth cylinder to reduce the frictional resistance when the transmission assembly is displaced.

[0046] Furthermore, the actuation component can be disposed on the fixed component; the transmission component can be placed on the fixed component; the first end of the transmission component can be connected to the actuation component, and the second end of the transmission component can be connected to the moving component; the moving component can be supported on the base plate by a support member; the actuation component includes at least: 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 to the first clamping member and the second clamping member respectively; the first end of the shape memory alloy wire is connected to the transmission component through the first clamping member; the second end of the shape memory alloy wire is connected to the fixed component through the second clamping member.

[0047] Furthermore, the transmission assembly includes at least: 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; a second end of the first connecting rod is connected to the first end of the second connecting rod; a second end of the second connecting rod is connected to the actuation assembly; a first end of the transmission cantilever is connected to the second end of the second connecting rod; a 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.

[0048] Furthermore, when the actuation component drives the transmission component, the first connecting rod of the transmission component will move about the first fixed part as an axis, and at the same time drive the second connecting rod of the transmission component to move together with the transmission cantilever, thereby causing the moving component connected to the transmission cantilever to generate displacement.

[0049] Furthermore, the transmission cantilever can be connected to the moving component and / or the second connecting rod by means of soldering, adhesive application, or riveting.

[0050] Compared with the prior art, the present invention provides support members above and below the transmission component. On the one hand, this can prevent the transmission component from warping in the Z direction due to insufficient stiffness in the Z direction during displacement. On the other hand, it can reduce the vertical movement space when no displacement occurs, thereby improving its reliability. In addition, the present invention also achieves the effect of expanding the optical image stabilization range while reducing the number of assembly parts and process steps by designing the transmission component and the transmission cantilever separately, with at least part of the transmission component being fixed in the plastic part during injection molding. This improves the optical image stabilization performance while freeing the transmission cantilever from the limitations of the transmission component's material and shape, thus improving the reliability of the transmission cantilever, further improving assembly accuracy and reducing assembly difficulty, and improving the mass production of the optical image stabilization device. Attached Figure Description

[0051] Figure 1 and Figure 2 This is a schematic diagram of the structure of an existing optical image stabilization device.

[0052] Figure 3 and Figure 4 This is a schematic diagram of the structure of an optical image stabilization device according to an embodiment of the present invention.

[0053] Figure 5 This is a schematic diagram of the structure of a transmission component according to an embodiment of the present invention.

[0054] Figure 6 This is a schematic diagram of the structure of a transmission component and an actuation component according to an embodiment of the present invention.

[0055] Figure 7 This is a cross-sectional schematic diagram of the structure of an optical image stabilization device according to an embodiment of the present invention.

[0056] Figure 8 This is a partial cross-sectional schematic diagram of the structure of an optical image stabilization device according to an embodiment of the present invention.

[0057] Figure 9 This is a schematic diagram of the structure of an optical image stabilization device according to an embodiment of the present invention. Detailed Implementation

[0058] Numerous specific details are set forth in the following description to provide a full understanding of the invention. However, the invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0059] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be described in detail below with reference to the accompanying drawings.

[0060] Figure 1 and Figure 2 This is a schematic diagram of an existing optical image stabilization device; see reference. Figure 1 as well as Figure 2 The optical image stabilization device includes: a shape memory alloy drive component 110, a fixed component 111, a moving component 112, and an elastic connection component 114.

[0061] A shape memory alloy drive component 110 is disposed between the fixed component 111 and the moving component 112 to drive the moving component 112 to move relative to the fixed component 111 in the X and Y directions or rotate about the Z axis.

[0062] The shape memory alloy drive 110 is connected to the fixed component 111 and / or the moving component 112 via a metal gasket 113, and the metal gasket 113 is detachably electrically connected to the fixed component 111 and / or the moving component 112.

[0063] The metal gasket 113 is electrically connected to the fixed component 111 and / or the movable component 112 in a detachable manner, such as by welding, adhesion or crimping.

[0064] The shape memory alloy drive component 110 includes a single shape memory alloy wire 1101 and a retaining portion 1102 that retains both ends of the shape memory alloy wire 1101.

[0065] The retaining part 1102 and the metal gasket 113 are connected by laser welding to ensure a stable electrical connection between the metal gasket 113 and the retaining part 1102.

[0066] for Figure 1 and Figure 2 The optical image stabilization device shown has an optical image stabilization travel (i.e., the distance the moving component 112 moves) equal to the extension and retraction distance of the shape memory alloy drive component 110 when energized, thus limiting the optical image stabilization travel.

[0067] To further increase the optical image stabilization range, unlike Figure 1 and Figure 2 The present invention provides embodiments of the prior art shown. By adding a transmission component, the optical image stabilization travel is amplified, further improving the optical image stabilization performance.

[0068] Figure 3 and Figure 4 This is a schematic diagram of another optical image stabilization device according to an embodiment of the present invention; see reference. Figure 3 as well as Figure 4 The optical image stabilization device includes: an actuation component 210, a fixed component 211, a moving component 212, a transmission component 213, and an elastic connection component 214.

[0069] Actuation component 210 is mounted on fixed component 211. Transmission component 213 is mounted on fixed component 211. The first end of transmission component 213 is connected to actuation component 210. The second end of transmission component 213 is connected to moving component 212. Fixed component 211 and moving component 212 are connected by elastic connection component 214.

[0070] A flexible connecting component 214 is disposed below the movable component 212 and the fixed component 211, with one end connected to the movable component 212 and the other end connected to the fixed component 211. The connection method includes soldering or laser soldering, and it is used to transmit electrical signals. The flexible connecting component 213 is made of materials including gold, silver, copper, iron, aluminum, gold alloy, silver alloy, copper alloy, iron alloy, or aluminum alloy. An image sensor chip can be mounted on the movable component 212.

[0071] The actuation component 210 drives the moving component 212 to move in the X and Y directions through the drive transmission component 213, and can make the first displacement generated by the actuation component 210 less than the second displacement generated by the moving component 212, thereby increasing the optical image stabilization stroke and improving the optical image stabilization performance.

[0072] In one implementation, the second displacement is at least 1.1 times the first displacement.

[0073] In one implementation, the second displacement is at least 1.5 times the first displacement.

[0074] Specifically, the actuation component 210 includes: a shape memory alloy wire 2101, a first clamping member 2102, and a second clamping member 2103.

[0075] The first end of the shape memory alloy wire 2101 is a movable end, which is connected to the transmission component 213. The second end of the shape memory alloy wire 2101 is a fixed end, which is connected to the fixing component 211.

[0076] When the shape memory alloy wire 2101 is energized, it deforms, thereby generating the first displacement.

[0077] The two ends of the shape memory alloy wire 2101 are fixed by the first clamping member 2102 and the second clamping member 2103, respectively.

[0078] The first end of the shape memory alloy wire 2101 is connected to the transmission assembly 213 via the first clamping member 2102. The connection method between the first clamping member 2102 and the transmission assembly 213 includes soldering, laser welding, conductive adhesive bonding, or integral molding.

[0079] The second end of the shape memory alloy wire 2101 is connected to the fixing component 211 via the second clamping member 2103. The connection method between the second clamping member 2103 and the fixing component 211 includes soldering or laser welding. The first clamping member 2102 and the second clamping member 2103 can be made of conductive metals, such as gold, silver, copper, iron, aluminum, gold alloys, silver alloys, copper alloys, iron alloys, or aluminum alloys.

[0080] In some implementations, there are at least two shape memory alloy wires 2101; at least two transmission components 213; and each shape memory alloy wire 2101 corresponds to at least one transmission component 213.

[0081] refer to Figure 5 The transmission assembly 213 includes at least: a first fixing part 2130 fixed to the fixing assembly 211, a first connecting rod 2131, a second connecting rod 2132 and a transmission cantilever 2133.

[0082] The first end of the first connecting rod 2131 ( Figure 5 Point B in the middle) is connected to the first fixing part 2130; the second end of the first connecting rod 2131 ( Figure 5 Point A in the middle) and the first end of the second connecting rod 2132 ( Figure 5 Point A in the middle) is connected; the second end of the second connecting rod 2132 ( Figure 5 Point C in the middle) is connected to the actuation assembly 210; the first end of the transmission cantilever 2133 ( Figure 5 Point C in the middle) and the second end of the second connecting rod ( Figure 5 Point C in the middle) is connected; the second end of the transmission cantilever 2133 ( Figure 5Point D in the diagram is connected to the moving component 212, wherein the transmission cantilever 2133 is assembled as a separate part. The transmission cantilever 2133 can be made of suitable materials, such as gold, silver, copper, iron, aluminum or any alloy thereof, and can be made of suitable shapes, such as long rod type, plate type, etc.

[0083] The connection between the first fixing part 2130 and the fixing component 211 includes soldering, laser welding, or conductive adhesive bonding. The second end of the transmission cantilever 2133 ( Figure 5 The connection between point D in the figure and the moving component 212 can be achieved by dispensing, soldering, or laser welding. The transmission component 213 can be injection molded as a single 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, etc. After the transmission component 213 is injection molded as a single piece, its outer side is wrapped with a plastic part (not shown in the figure). The first connecting rod 2131 is not wrapped with the plastic part to ensure its elastic function.

[0084] At least one of the first connecting rod 2131, the second connecting rod 2132, or the transmission cantilever 2133 is a flexible connecting rod. Figure 5 For illustrative purposes only, the shape of the flexible connecting rod may include other shapes such as a slender cantilever or a bent spring.

[0085] Specifically, when the actuation component 210 drives the transmission component 213, the first connecting rod 2131 of the transmission component 213 (for example, it can be a flexible rod) will move about the first fixed part 2130 as the axis, and at the same time drive the second connecting rod 2132 of the transmission component 213 and the transmission cantilever 2133 of the transmission component 213 to move together, thereby driving the connected moving component 213 to generate displacement.

[0086] In one embodiment, a convex or concave limiting feature 2134 is provided on the first fixing part 2130, and at least one of the first connecting rod 2131, the second connecting rod 2132, or the plastic part covering its outer side is provided with a concave or convex limiting feature. The two limiting features cooperate to form a limiting structure, which is used to limit the movement range of the transmission assembly 213. Figure 5 As shown, the limiting feature 2134 is a convex structure, and the second connecting rod 2132 is provided with a convex limiting feature 2135, thereby cooperating with each other to restrict the movement of the transmission assembly 213 and improve its reliability. In other embodiments, corresponding limiting structures can be designed according to the specific structure of the transmission assembly 213, which are not limited here.

[0087] Considering that the transmission component 213 may vibrate during movement, affecting the optical image stabilization performance. For example... Figure 5 , Figure 8 , Figure 9As shown, in order to enable the transmission assembly 213 to operate smoothly during movement, this embodiment of the 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 bearing, a smooth cylinder, etc., and the material includes metal, ceramic, or resin.

[0088] Specifically, such as Figure 8 As shown, the support member 2136 can be fixed to the transmission assembly 213 and then contact the housing 610; or, the support member 2136 can be fixed to the housing 610 and then contact the transmission assembly 213; or, the support member is placed in a recess on the transmission assembly 213 and has an arc-shaped surface protruding from the transmission assembly 213; or, the support member is a smooth boss integrally injection molded with the transmission assembly 213. Furthermore, there is a height difference between the two ends of the shape memory alloy wire 2101, ensuring that the support member 2136 simultaneously contacts both the transmission assembly 213 and the housing 610. Specifically, one end of the second clamping member 2103 holding the shape memory alloy wire 2101 is higher than the other end of the first clamping member 2102 holding the shape memory alloy wire 2101. The end of the second clamping member 2103 holding the shape memory alloy wire 2101 can provide an upward pulling force, ensuring that the support member 2136 simultaneously contacts both the transmission assembly 213 and the housing 610 on the side of the support member.

[0089] like Figure 6 As shown, in this embodiment of the invention, the actuation component 210 and the transmission component 213 can be integrally formed.

[0090] In some embodiments, the actuation component 210 and the transmission component 213 may be disposed on the support frame; after the actuation component 210 and the transmission component 213 are assembled with the fixed component 211 and the moving component 212, the excess portion of the support frame is cut off.

[0091] like Figure 7 As shown, the movable component 212 is supported on the base plate 310 by the support member 510. The image sensor chip 410 is placed on the movable component 212. The movable component 212 may be a first magnetic component, or have magnetic conductivity, or include a first steel plate; the base plate 310 may be a second magnetic component, or have magnetic conductivity, or include a second steel plate; the movable component 212 and the base plate 310 are in contact with the support member 510 by the attraction generated by the magnetic field. The support member 510 may include a ball bearing, a column with a smooth surface; the material may include stainless steel or ceramic; the first magnetic component and / or the second magnetic component may be a magnet.

[0092] Protective shells (not shown in the figure) can be provided on the fixed component 211 and the movable component 212. The protective shells have limiting features. The limiting features of the protective shell of the fixed component 211 and the limiting features of the protective shell of the movable component 212 together form a limiting function to limit the maximum range of movement of the movable component 212.

[0093] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations 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 protection scope of the technical solutions of the present invention.

[0094] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations 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 protection scope of the technical solutions of the present invention.

Claims

1. An optical image stabilization device for use in image sensors, characterized in that, At least including: Fixed components, moving components, actuating components, transmission components, and support components; The actuating component is mounted on the fixing component; The transmission component is placed on the fixed component; the first end of the transmission component is connected to the moving component, and the second end of the transmission component is connected to the actuation component; The actuation component drives the transmission component to move the moving component, and the first displacement generated by the actuation component is less than the second displacement generated by the moving component, thereby increasing the optical image stabilization range and improving the optical image stabilization performance. The support member is placed on at least one side of the transmission assembly to improve the stability and reliability of the transmission assembly during movement. The outer side of at least a portion of the transmission component is covered with a plastic part, and the transmission component and the plastic part are integrally formed. The transmission assembly includes at least: 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, a second end of the first connecting rod is connected to the first end of the second connecting rod, and a second end of the second connecting rod is connected to the actuation assembly. The device also includes a transmission cantilever, which is assembled as a separate part. 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 component. The plastic part outside the transmission assembly has a recess in the contact area with the support member to accommodate the support member, and the support member has a portion protruding from the surface of the transmission assembly after being placed into the recess. The connection method between the transmission cantilever and the moving component and / or the transmission component includes soldering, glue application or riveting. 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.

2. The optical image stabilization device as described in claim 1, characterized in that, After the transmission component is injection molded as a single unit, its outer side is wrapped with the plastic part, wherein the first connecting rod is not wrapped by the plastic part to ensure the elastic function of the first connecting rod.

3. The optical image stabilization device as described in claim 1, characterized in that, The actuation component further includes: 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, which is connected to the transmission assembly; The second end of the shape memory alloy wire is a fixed end, which is connected to the fixing component.

4. The optical image stabilization device as described in claim 3, characterized in that, The actuation assembly further includes at least two clamping members, and the two ends of the shape memory alloy wire are respectively fixed by the first clamping member and the second clamping member; there is a height difference between the first clamping member and the second clamping member to ensure that the actuation force generated by the shape memory alloy wire will simultaneously contact the support member with the transmission assembly and the housing or fixing assembly.

5. The optical image stabilization device as described in claim 1, characterized in that, 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.

6. The optical image stabilization device as described in claim 2, characterized in that, When the actuation component drives the transmission component to move the moving component, the transmission component causes at least one of the support members to contact the housing or the fixed component to prevent the transmission component from warping.

7. The optical image stabilization device as described in claim 1, characterized in that, The support member on at least one side contacts the transmission assembly and the housing or fixing assembly.

8. The optical image stabilization device as described in claim 1, characterized in that, The support member on at least one side is a sphere with a smooth surface, a column with a smooth contact surface, or a boss that is integrally injection molded with the transmission assembly.

9. The optical image stabilization device as described in claim 4, characterized in that, 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 via the first clamping member; The second end of the shape memory alloy wire is connected to the fixing component via a second clamping member; The connection method between the second clamping member and the fixing component includes soldering or laser welding, and conductive adhesive bonding; The first clamping member and the second clamping member are made of conductive metal.

10. The optical image stabilization device as described in claim 4, characterized in that, The connection method between the first fixing part and the fixing component includes soldering or laser welding, and conductive adhesive bonding.

11. The optical image stabilization device as described in claim 10, characterized in that, At least one of the first connecting rod, the second connecting rod, or the transmission cantilever is a flexible connecting rod.

12. The optical image stabilization device as described in claim 11, characterized in that, The flexible connecting rod may be shaped like a slender cantilever or a curved spring.

13. The optical image stabilization device as described in claim 12, characterized in that, When the actuation component drives the transmission component, the second connecting rod of the transmission component will move together with the first connecting rod around the first fixed part as the axis, and at the same time drive the transmission cantilever to move together, thereby causing the moving component connected to the transmission cantilever to generate displacement.

14. The optical image stabilization device as described in claim 13, characterized in that, When energized, the shape memory alloy wire generates the first displacement, which drives the second connecting rod connected to the shape memory alloy wire to generate a transmission displacement around the connection between the first connecting rod and the second connecting rod. 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 between the first connecting rod and the first fixed part. The first displacement is less than the second displacement, thereby amplifying the anti-shake stroke.

15. The optical image stabilization device as described in claim 1, characterized in that, The second displacement is at least 1.1 times the first displacement.

16. The optical image stabilization device as described in claim 10, characterized in that, The first fixing part or its outer plastic part is provided with a convex or concave limiting feature. At least one of the first connecting rod, the second connecting rod or its outer plastic part is provided with a concave or convex limiting feature. The two limiting features cooperate to form a limiting structure to limit the movement range of the transmission component.

17. The optical image stabilization device as described in claim 1, characterized in that, The fixed component has a plurality of the transmission components, wherein the transmission cantilever of any two adjacent transmission components does not contact each other.

18. The optical image stabilization device as described in claim 1, characterized in that, The movable component is supported on the base plate by a support member; 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 are attracted by the magnetic field, ensuring that the moving component is in contact with the supporting component.

19. The optical image stabilization device as described in claim 1, characterized in that, The moving component includes a first magnetic component, or a material with magnetic conductivity, or includes a first steel plate; The device further includes a housing, wherein the housing comprises a second magnetic component, or a material having magnetic permeability, or comprises a second steel plate; The magnetic attraction between the first magnetic component and the second magnetic component ensures that the moving component is stably attached to the outer shell.

20. The optical image stabilization device as described in claim 18, characterized in that, The support component includes a ball bearing, a column with a smooth surface, or a boss with a smooth surface that is integrally injection molded with the moving component; the material includes metal or ceramic, resin; the first magnetic component and / or the second magnetic component is a magnet.

21. The optical image stabilization device as described in claim 1, characterized in that, The fixed component and the movable component together form a limiting function through plastic parts externally disposed on both, which is used to limit the maximum movable range of the movable component.

22. The optical image stabilization device as described in claim 3, characterized in that, The shape memory alloy wire is at least two; The transmission components are at least two; Each of the shape memory alloy wires corresponds to at least one of the transmission components.

23. The optical image stabilization device as described in claim 1, characterized in that, The device also includes a flexible connection component; The elastic connection assembly is arranged below the moving assembly and the fixed assembly, and includes at least one metal spring wire. The first end of the metal spring wire is connected to the moving assembly of the optical image stabilization device, and the opposite second end is connected to the fixed assembly of the optical image stabilization device. The metal spring wire can be used to conduct electrical signals, and each of the metal spring wires includes at least two metal layers with an insulating layer between each metal layer. 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.

24. The optical image stabilization device as described in claim 1, characterized in that, The mobile component is equipped with an image sensor chip.

25. A camera module, characterized in that, Includes the optical image stabilization device as described in any one of claims 1 to 24.

26. A method for improving the optical image stabilization range using the optical image stabilization device according to any one of claims 1 to 24, characterized in that, include: By setting up a transmission component, when the optical image stabilization device is in working condition, the actuator component drives the transmission component to move the moving component, so that the second displacement generated by the moving component is greater than the first displacement generated by the actuator component, thereby increasing the optical image stabilization stroke and improving the optical image stabilization performance. The optical image stabilization device includes at least a fixed component, a movable component, a support component, the actuation component, and the transmission component; At least one support is provided on at least one side of the transmission assembly to maintain the stability and reliability of the transmission assembly.

27. The method as described in claim 26, characterized in that, The movable component is connected to the transmission component via a transmission cantilever, wherein the transmission cantilever is assembled as a separate part.

28. The method as described in claim 27, characterized in that, The transmission cantilever is connected to the moving component and / or the transmission component by means of soldering, gluing or riveting.

29. The method as described in claim 28, characterized in that, 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.

30. The method as described in claim 26, characterized in that, The outer side of at least a portion of the transmission component is wrapped with a plastic part, and the transmission component and the plastic part are integrally injection molded.

31. The method as described in claim 26, characterized in that, A recess is provided in the contact area between the transmission component and the support member to accommodate the support member.

32. The method as described in claim 31, characterized in that, The support member has a portion protruding from the surface of the transmission assembly after being inserted into the recess. When the actuation assembly drives the transmission assembly to move the moving assembly, the transmission assembly drives the support member to move to contact the outer shell or the fixed assembly to prevent the transmission assembly from warping.

33. The method as described in claim 32, characterized in that, The support component is brought into contact with the transmission component and the housing or fixing component according to the working state of the transmission component.

34. The method as described in claim 26, characterized in that, The support member is a smooth-surfaced sphere, a smooth-surfaced cylinder, or a boss that is integrally injection molded with the transmission component.

35. The method as described in claim 26, characterized in that, The actuation component is disposed on the fixed component; the transmission component is placed on the fixed component; the first end of the transmission component is connected to the moving component through the transmission cantilever, and the second end of the transmission component is connected to the actuation component; The movable component is supported on the base plate by a support member; The actuation component includes at least: 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 via the first clamping member; The second end of the shape memory alloy wire is connected to the fixing component via the second clamping member.

36. The method as described in claim 27, characterized in that, The transmission assembly includes at least: A first fixing part, a first connecting rod, and a second connecting rod are fixed to the fixing assembly; the 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 actuation 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; At least one of the first connecting rod, the second connecting rod, or the transmission cantilever is a flexible connecting rod.

37. The method as described in claim 36, characterized in that, When the actuation component drives the transmission component, the first connecting rod of the transmission component will move about the first fixed part as an axis, and at the same time drive the second connecting rod of the transmission component to move together with the transmission cantilever, thereby causing the moving component connected to the transmission cantilever to generate displacement.

38. The method as described in claim 36, characterized in that, The transmission assembly, excluding the first connecting rod, is injection molded as a single piece to be fixed inside the plastic part.

39. The method as described in claim 36, characterized in that, The transmission cantilever is connected to the moving component and / or the second connecting rod by means of soldering, gluing, or riveting.

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