Camera module and single-point actuator

Abstract

The present invention discloses a single-point actuator, which includes a fixed end, a movable end, and an SMA wire. The movable end has an elastic structure. The two ends of the SMA wire are respectively connected to the fixed end and the movable end. When the SMA wire is energized and shrinks, it drives the movable end to move. When the SMA wire is de-energized, the movable end can reset under the action of its own elastic force. The single-point actuator of the present invention has only one movable end. The moving stroke of the movable end driven by the contraction of the SMA wire when it is energized is twice that of the prior art when driving two movable ends to move. Therefore, the present invention enables the movable end to have a larger moving stroke, can drive the object to be moved to generate a larger stroke, thereby achieving a larger angle adjustment and improving the adjustment accuracy. By utilizing the characteristic of the SMA wire to shrink when heated to obtain the actuation function, the structure of the single-point actuator is simplified, and the requirements for product miniaturization can be met. The present invention also discloses a camera module having a single-point actuator.

Description

Technical Field

[0001] The present invention relates to the technical field of optical image stabilization, and particularly to a large-stroke camera module integrating image stabilization and focusing functions and a single-point actuator applied thereto. Background Art

[0002] Camera modules usually have functions such as autofocus and optical image stabilization. Among them, autofocus is achieved by driving the lens to move in the optical axis direction through a focusing actuator. Optical image stabilization is to compensate for the jitter, instability or other reasons during the photographing process that cause the lens to shift. Generally, this kind of lens deflection occurs in the direction perpendicular to the optical axis. Therefore, generally, an image stabilization actuator is added on the basis of autofocus to drive the lens to move or flip in the direction perpendicular to the optical axis to compensate for the above-mentioned deflection of the lens and help the camera obtain better image quality.

[0003] Existing camera modules at least include a lens, a focusing actuator, an image stabilization actuator, and a photosensitive component in terms of structure. The lens is installed on a moving carrier, and the carrier is driven to move through the focusing actuator and the image stabilization actuator respectively to achieve autofocus and image stabilization respectively, so that the light from the self-photographing object passes through the lens and is focused on the photosensitive element of the photosensitive component. Due to the settings of the focusing actuator and the image stabilization actuator in the existing camera module, not only does it lead to a complex overall structure, but also the movement of the lens is restricted, affecting the accuracy of its adjustment. In addition, the driving forces of the focusing actuator and the image stabilization actuator are limited, so the stroke and speed of driving the lens to move are restricted, and both the stroke of the lens movement adjustment and the movement time are restricted, affecting the autofocus and image stabilization effects.

[0004] Therefore, it is necessary to provide a large-stroke camera module integrating image stabilization and focusing functions and a single-point actuator applied thereto to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a single-point actuator that can provide a greater driving force and a greater moving stroke and has a simple structure.

[0006] Another purpose of the present invention is to provide a large-stroke camera module integrating image stabilization and focusing functions and having a simplified structure.

[0007] To achieve the above purpose, the technical solution of the present invention is: to provide a single-point actuator, which includes a fixed end, a movable end, and an SMA wire. The movable end has an elastic structure. The two ends of the SMA wire are respectively connected to the fixed end and the movable end. When the SMA wire is energized and contracts, it drives the movable end to move. When the SMA wire is de-energized, the movable end can reset under the action of its own elastic force.

[0008] Preferably, the movable end includes a first connecting section, a second connecting section, and a bending section connecting the two. At least the first connecting section is an elastic structure. One end of the SMA wire is connected to the second connecting section and extends along the first connecting section. When the SMA wire is energized and shrinks, it applies a force to the second connecting section to pull it to move.

[0009] Preferably, the single-point actuator further includes a pushing block. The pushing block is connected to the second connecting section and has an insulating structure. The protruding direction of the pushing block is the same as the moving direction of the second connecting section when it is pulled by the SMA wire.

[0010] Compared with the prior art, since the single-point actuator of the present invention has a movable end, when the SMA wire is energized and shrinks, it drives the movable end to move to drive the object that needs to move. When the SMA wire is powered off, the movable end can reset under the action of its own elastic force. Utilizing the characteristic that the SMA wire shrinks when heated to obtain an actuation function simplifies the structure of the single-point actuator and can meet the requirements of product miniaturization. Secondly, there is only one movable end, and the moving stroke of the movable end driven by the energized and shrinking SMA wire is twice the stroke when driving two movable ends in the prior art. Therefore, the present invention enables the movable end to have a larger moving stroke, can drive the object that needs to move to generate a larger stroke, thereby realizing a larger angle adjustment and improving the adjustment accuracy.

[0011] The present invention also provides a camera module, which includes a focusing mechanism and an anti-shake mechanism. Among them, the focusing mechanism includes a support base, a moving carrier, a first suspension unit, and a first single-point actuator. The moving carrier is suspended on the support base through the first suspension unit. The first single-point actuator is installed on the support base and is located on one side of the moving carrier. The first single-point actuator is used to drive the moving carrier to move along the optical axis direction. The anti-shake mechanism includes a base, a second suspension unit, and at least two second single-point actuators. The second suspension unit is connected to the base. The focusing mechanism is movably accommodated in the base and the support base is connected to the second suspension unit. Each of the second single-point actuators is installed on the side wall of the base, and the focusing mechanism is driven by each of the second single-point actuators to translate or rotate in a plane perpendicular to the optical axis.

[0012] Preferably, both the first single-point actuator and the second single-point actuator include a fixed end, a movable end, and an SMA wire. The movable end is an elastic structure. The two ends of the SMA wire are respectively connected to the fixed end and the movable end. When the SMA wire is energized and shrinks, it drives the movable end to move. When the SMA wire is powered off, the movable end can reset under the action of its own elastic force.

[0013] Preferably, the movable end includes a first connecting section, a second connecting section, and a bending section connecting the two. At least the first connecting section is an elastic structure. A part of the first connecting section is fixed to the support base or the base, and another part of the first connecting section is in a suspended state. One end of the SMA wire is connected to the second connecting section and extends along the first connecting section. When the SMA wire is energized and contracts, it applies a force to the second connecting section to pull it and act on the movable carrier or the focusing mechanism.

[0014] Preferably, a fixing block is provided at one end of the support base. The fixed end of the first single-point actuator is fixed to the fixing block, and one end of the movable end of the first single-point actuator is fixed to the fixing block, so that the other end of the movable end of the first single-point actuator is in a suspended state and protrudes in a direction away from the fixed end. The suspended end of the movable end of the first single-point actuator is connected to the SMA wire.

[0015] Preferably, a driving portion is provided on the movable carrier. The driving portion protrudes in a direction perpendicular to the optical axis. The movable end of the first single-point actuator acts on the driving portion to drive the movable carrier to move along the optical axis direction.

[0016] Preferably, the anti-shake mechanism has four second single-point actuators. The movable ends of the four second single-point actuators are located at two vertices on the first diagonal line of the base, and the fixed ends of the four second single-point actuators are located at two vertices on the second diagonal line of the base. The second diagonal line intersects with the first diagonal line.

[0017] Preferably, the first suspension unit includes an upper elastic sheet and a lower elastic sheet with an elastic structure. The upper elastic sheet and the lower elastic sheet are respectively connected to the upper and lower ends of the movable carrier in the optical axis direction, and the upper elastic sheet and the lower elastic sheet are also respectively connected to the support base, thereby suspending the movable carrier on the support base. When the movable carrier moves in the optical axis direction, it drives the upper elastic sheet and the lower elastic sheet to deform, and the upper elastic sheet and the lower elastic sheet recover from the deformation to drive the movable carrier to reset.

[0018] Preferably, two spaced fixing columns protrude from one end of the support base. The upper elastic sheet is connected to the end of the fixing column close to the support base and is spaced from the support base, and the lower elastic sheet is connected to the end of the fixing column away from the support base.

[0019] Preferably, the second suspension unit includes at least two suspension elastic sheets. At least two suspension elastic sheets are evenly arranged around the optical axis. The two ends of the suspension elastic sheet are respectively connected to the base and the support base.

[0020] Preferably, the suspension elastic piece includes a first cantilever and at least one second cantilever arranged at an angle. Both the first cantilever and the second cantilever are of elastic structures. The first cantilever is connected to the base, and the second cantilever is connected to the support seat. Moreover, both the first cantilever and the second cantilever are spaced from the base and the support seat. When the focusing mechanism moves, it can cause the first cantilever or / and the second cantilever to deform, and the restoration of deformation of the first cantilever or / and the second cantilever can drive the focusing mechanism to reset.

[0021] Preferably, the suspension elastic piece has two second cantilevers. The two second cantilevers are connected to both ends of the first cantilever and are parallel to each other. The first cantilever is connected to the base, and the two second cantilevers are respectively connected to opposite side walls of the support seat.

[0022] Preferably, a first convex block protrudes from the outer wall of the support seat, and a second convex block protrudes from the inner wall of the base. The first convex block and the second convex block are arranged in an interleaved manner. The first cantilever is connected to the second convex block, and the second cantilever is connected to the first convex block.

[0023] Compared with the prior art, for the camera module of the present invention, firstly, it integrates a focusing mechanism and an anti-shake mechanism, and can simultaneously achieve the functions of automatic focusing and anti-shake, improving the performance of the camera module; secondly, its focusing mechanism is movably accommodated in the base of the anti-shake mechanism and is suspended by a second suspension unit. Each second single-point actuator is installed on the side wall of the base. By driving the focusing mechanism to translate or rotate in a plane perpendicular to the optical axis through each second single-point actuator, the nested structure setting and the installation of each second single-point actuator on the side of the focusing mechanism make the overall structure of the camera module more compact, which is beneficial to the miniaturization of the device volume; furthermore, the focusing mechanism is suspended in the base, and the moving carrier of the focusing mechanism is suspended on its support seat through a first suspension unit. This suspension setting enables the focusing mechanism and its moving carrier to have no friction during the moving process, improving the anti-shake performance and the automatic focusing performance; finally, both the first single-point actuator and the second single-point actuator are single-point drive structures, so the focusing mechanism and its moving carrier can both have a larger stroke range, further improving the anti-shake accuracy and the automatic focusing accuracy. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the camera module of the present invention.

[0025] Figure 2 is Figure 1 a schematic structural diagram with the housing removed.

[0026] Figure 3 is Figure 2 an exploded view of...

[0027] Figure 4 is Figure 3 The exploded view of the anti-shake mechanism in

[0028] Figure 5 is Figure 3 The schematic structural diagram of removing the second suspension unit of the anti-shake mechanism in

[0029] Figure 6 is Figure 5 The schematic bottom surface structure diagram of

[0030] Figure 7 is Figure 6 The top view of

[0031] Figure 8 is Figure 4 The schematic bottom surface structure diagram of the base in

[0032] Figure 9 is Figure 4 The schematic structural diagram of a second single-point actuator in

[0033] Figure 10 is Figure 3 The exploded view of the focusing mechanism in

[0034] Figure 11 is Figure 10 The schematic bottom surface structure diagram of the support base in

[0035] Figure 12 is Figure 10 The schematic structural diagram of another angle of the moving carrier in

[0036] Figure 13 is the schematic structural diagram of the cooperation between the support base and the first single-point actuator in the present invention.

[0037] Figure 14 is Figure 13 The schematic bottom surface structure diagram of Detailed implementation manners

[0038] Now, embodiments of the present invention will be described with reference to the accompanying drawings, in which like reference numerals represent like elements. It should be noted that the orientation descriptions involved in the present invention, such as up, down, left, right, front, back, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the technical solutions of the present application or / and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. The first, second, etc. described are only used to distinguish technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0039] First combine Figures 1 - 14 As shown, the single-point actuator provided by the present invention includes a fixed end, a movable end, and an SMA wire. Among them, the movable end has an elastic structure, and both ends of the SMA wire are respectively connected to the fixed end and the movable end. When the SMA wire is energized and shrinks, it will drive the movable end to move, and the movable end is used to drive the component that needs to move. When the SMA wire is de-energized, the movable end can reset under the action of its own elastic force. The present invention utilizes the characteristic that the SMA wire shrinks when heated to enable the movable end to obtain an actuation function. The use of the SMA wire for actuation can simplify the structure of the single-point actuator and meet the requirements of product miniaturization; in addition, with the structure setting of only one movable end, the moving stroke of the SMA wire when energized and shrinking to drive the movable end is twice the stroke when driving two movable ends in the prior art. Therefore, compared with the prior art, the present invention has a larger moving stroke, can drive the component that needs to move to generate a larger stroke, realize a larger angle of adjustment, and improve the adjustment accuracy.

[0040] Next, combine the attached Figures 1 - 14 As shown, the structure of the camera module 1 having the above single-point actuator of the present invention will be described in detail.

[0041] First combine Figures 1 - 14 As shown, the camera module 1 provided by the present invention includes a focusing mechanism 100 and an anti-shake mechanism 200. The focusing mechanism 100 has a mounting hole 120a for mounting optical components, such as for mounting a lens, an optical sensor, etc. The focusing mechanism 100 can drive the optical component to move along the optical axis direction (Z-axis direction) to achieve autofocus. And, the focusing mechanism 100 is movably accommodated in the anti-shake mechanism 200, as shown in Figure 2 , and the anti-shake mechanism 200 drives the focusing mechanism 100 and the optical component thereon to translate or rotate in a plane perpendicular to the optical axis to achieve anti-shake. This embedding method of the focusing mechanism 100 and the anti-shake mechanism 200 enables the camera module 1 to integrate the focusing and anti-shake functions, and the overall structure is more compact, which is beneficial to the miniaturization of its structure.

[0042] Combine Figures 2 - 3 , Figures 10 - 14 As shown, in the present invention, the focusing mechanism 100 includes a support base 110, a moving carrier 120, a first suspension unit 130, and a first single-point actuator 140. The moving carrier 120 is suspended from the support base 110 through the first suspension unit 130. The moving carrier 120 is provided with a mounting hole 120a for mounting optical components. The first single-point actuator 140 is mounted on the support base 110 and is located on one side of the moving carrier 120. See Figures 13 - 14As shown, the first single-point actuator 140 is used to drive the moving carrier 120 to move along the optical axis direction (Z-axis direction), thereby driving the optical component to move along the optical axis direction (Z-axis direction) to achieve autofocus.

[0043] Combined with Figures 1 - 9 As shown, the anti-shake mechanism 200 includes a base 210, a second suspension unit 220, and at least two second single-point actuators 230. The second suspension unit 220 is connected to the base 210. The focusing mechanism 100 is movably accommodated in the base 210 (see Figure 2 ), and its support base 110 is connected to the second suspension unit 220. The focusing mechanism 100 is suspended in the base 210 through the second suspension unit 220. Each second single-point actuator 230 is installed on the side wall of the base 210. Refer to Figures 5 - 7 As shown, by driving the focusing mechanism 100 to translate or rotate in a plane perpendicular to the optical axis through each second single-point actuator 230, the optical component can be translated or rotated in a plane perpendicular to the optical axis, thereby achieving optical anti-shake.

[0044] Refer to again Figure 1 As shown, the camera module 1 of the present invention further includes a housing 300. The housing 300 includes an upper housing 310 and a bottom plate 320. The upper housing 310 covers the outside of the base 210, and the bottom plate 320 is connected to the bottom of the upper housing 310, thereby covering the focusing mechanism 100 and the anti-shake mechanism 200 inside the housing 300. At the same time, through holes (not labeled) corresponding to the aforementioned mounting holes 120a are opened on both the upper housing 310 and the bottom plate 320, so that the optical component on the moving carrier 120 can be exposed outside the housing 300.

[0045] It should be noted that the first single-point actuator 140 and the second single-point actuator 230 involved in the camera module 1 of the present invention have the same structure as the above single-point actuator. For the convenience of subsequent description, the first and the second are used for expression respectively. In addition, the structures of other parts involved in the camera module 1 of the present invention are all conventional structures in the art, so they will not be described in detail below. The structures of the focusing mechanism 100 and the anti-shake mechanism 200 will be mainly described in detail below.

[0046] First combined with Figures 10 - 14As shown, in the present invention, the first suspension unit 130 of the focusing mechanism 100 is connected to three sides of the moving carrier 120, thereby suspending the moving carrier 120 on the support base 110. The first single-point actuator 140 is disposed corresponding to the fourth side of the moving carrier 120. That is, only one first single-point actuator 140 is provided, and the first suspension unit 130 and the first single-point actuator 140 are disposed around the four sides of the moving carrier 120. Unilateral driving is performed by one first single-point actuator 140 to move the moving carrier 120 in the optical axis direction (Z-axis direction), thereby reducing the number of driving mechanisms, simplifying the structure of the focusing mechanism 100, and reducing the production cost.

[0047] See Figure 10 As shown, the focusing mechanism 100 further includes a lower housing 150. The lower housing 150 covers the outside of the moving carrier 120 and is connected to the support base 110. The lower housing 150 and the support base 110 cooperate to enable structures such as the moving carrier 120 to be located inside. Moreover, the aforementioned mounting holes 120a are penetratingly formed in the moving carrier 120, and components such as a lens assembly or an image sensor are mounted on the moving carrier 120 through the mounting holes 120a. Through holes (not labeled) corresponding to the mounting holes 120a are formed in the support base 110 and the lower housing 150, so that components such as a lens assembly or an image sensor can be exposed from the focusing mechanism 100. The structure and connection manner of the lower housing 150 are conventional manners in the art and will not be described in detail.

[0048] Next, in conjunction with Figures 10 - 11 , Figure 13 As shown, in the present invention, the support base 110 has opposite first and second ends in the Y-axis direction. Two fixing columns 111 spaced apart are convexly provided at the first end of the support base 110, and the two fixing columns 111 are spaced apart along the X-axis direction, as Figure 11 shown. A fixing block 112 is provided at the second end of the support base 110, and the height of the fixing block 112 is less than the height of the fixing columns 111. The first suspension unit 130 is connected to the fixing columns 111 and the moving carrier 120, thereby suspending the moving carrier 120 on the support base 110 and enabling the moving carrier 120 to move freely. The first single-point actuator 140 is mounted on the fixing block 112 with its movable end suspended (details will be described later). When the movable end of the first single-point actuator 140 moves, it can drive the moving carrier 120 to move in the optical axis direction (Z-axis direction).

[0049] In conjunction with Figures 2 - 3 , Figures 10 - 11 As shown, first convex blocks 113 are respectively convexly provided at the first and second ends of the support base 110. The two first convex blocks 113 protrude horizontally, and the two first convex blocks 113 are used to mount the focusing mechanism 100 in the base 210. See Figure 2 shown.

[0050] More specifically, the mobile carrier 120 also has opposite first and second ends in the Y-axis direction. At two top corners of the second end of the mobile carrier 120, two convex portions 121 are provided, and the two convex portions 121 extend horizontally, that is, the two convex portions 121 extend along the X-axis direction. At one top corner of the first end of the mobile carrier 120, a convex portion 121 is provided, and the convex portion 121 extends along the Y-axis direction. The aforementioned convex portion 121 is used to connect with the first suspension unit 130 to realize the suspension installation of the mobile carrier 120.

[0051] As shown in the following in conjunction with Figure 10 and Figures 13 - 14 In the present invention, the first suspension unit 130 includes an upper elastic sheet 131 and a lower elastic sheet 132 with an elastic structure. The upper elastic sheet 131 is connected to the bottom of the fixed column 111 and is spaced from the support seat 110. The lower elastic sheet 132 is connected to the top of the fixed column 111, so that the upper elastic sheet 131 and the lower elastic sheet 132 are arranged at intervals up and down. The upper elastic sheet 131 and the lower elastic sheet 132 are also respectively connected to the upper and lower ends of the mobile carrier 120 in the optical axis direction (Z-axis direction), thereby suspending the mobile carrier 120 on the support seat 110. When the mobile carrier 120 moves in the optical axis direction (Z-axis direction), the upper elastic sheet 131 and the lower elastic sheet 132 are deformed, and the upper elastic sheet 131 and the lower elastic sheet 132 restore the deformation to drive the mobile carrier 120 to reset. The mobile carrier 120 is suspended and supported by the upper elastic sheet 131 and the lower elastic sheet 132 to ensure the stability of the installation of the mobile carrier 120 and the force balance.

[0052] Continuing to refer to Figure 10 and Figures 13 - 14 As shown, in one embodiment, there are three upper elastic sheets 131 and three lower elastic sheets 132, namely upper elastic sheets 131a to 131c and lower elastic sheets 132a to 132c respectively. During installation, the upper elastic sheets 131a and 131b are respectively connected to the bottoms of the two fixed columns 111 and extend along the Y-axis direction, that is, the upper elastic sheets 131a and 131b are respectively connected to the ends of the fixed columns 111 close to the support seat 110, and the other ends of the upper elastic sheets 131a and 131b are connected to the top surfaces of the two convex portions 121 at the second end of the mobile carrier 120. The upper elastic sheet 131c is located between the two fixed columns 111, that is, the upper elastic sheet 131c extends along the X-axis direction. One end of the upper elastic sheet 131c is connected to the bottom of one of the fixed columns 111, and the other end is connected to the top surface of the convex portion 121 provided at the first end of the mobile carrier 120. Refer to Figure 14 As shown. Moreover, there is a certain gap between the three upper elastic sheets 131a to 131c and the support seat 110. By arranging the three upper elastic sheets 131a to 131c relative to the three sides of the mobile carrier 120 for connection, the suspension of the mobile carrier 120 is realized.

[0053] Correspondingly, the three lower spring pieces 132a-132c are respectively arranged in parallel with the three upper spring pieces 131a-131c, one end of the lower spring pieces 132a and 132b are respectively connected to the top of the fixing column 111 and extend along the Y-axis direction, that is, connected to the end of the fixing column 111 away from the support seat 110, and the other ends of the lower spring pieces 132a and 132b are respectively connected to the bottom surfaces of the two protrusions 121 at the second end of the mobile carrier 120, so as to support the mobile carrier 120. The lower spring piece 132c is arranged between the two fixing columns 111 and extends along the X-axis direction, one end of the upper spring piece 131c is connected to the top of one of the fixing columns 111, and the other end thereof is connected to the bottom surface of the protrusion 121 arranged at the first end of the mobile carrier 120 for support.

[0054] It is understandable that the number of the upper spring pieces 131 and the lower spring pieces 132 is not limited to three, and other numbers of the upper spring pieces 131 and the lower spring pieces 132 can also realize the suspension installation of the mobile carrier 120 .

[0055] In the present invention, the upper spring sheet 131 and the lower spring sheet 132 are used to suspend and support the mobile carrier 120, so as to ensure the stability of the installation of the mobile carrier 120 and the force balance. In addition, each of the upper spring sheet 131 and the lower spring sheet 132 is in the form of a long sheet, both of which have a certain width, but both of which have a very small thickness. Therefore, both have a small rigidity in the thickness direction, and the rigidity in the length and width directions is greater than the rigidity in the thickness direction. After installation, the thickness direction of the upper spring sheet 131 and the lower spring sheet 132 is along the Z-axis direction, that is, the rigidity of the upper spring sheet 131 and the lower spring sheet 132 in the Z-axis direction is less than the rigidity in other directions, thereby making the mobile carrier 120 have a higher mobile sensitivity in the Z-axis direction, and the mobile carrier 120 will not generate friction during the movement, thereby improving the focusing accuracy.

[0056] Next, continue to combine Figure 10 , Figures 13 - 14 As shown, in the present invention, the first single-point actuator 140 is installed at the second end of the support seat 110 and extends along the X-axis direction. The first single-point actuator 140 includes a fixed end 141, a movable end 142 and an SMA wire 143. The movable end 142 is an elastic structure. The fixed end 141 and the movable end 142 are both connected to the support seat 110. The two ends of the SMA wire 143 are respectively connected to the fixed end 141 and the movable end 142. When the SMA wire 143 is energized and contracted, it drives the movable end 142 to move to act on the mobile carrier 120, while the fixed end 141 does not move, thereby forming a single-point driving structure, that is, there is only one point of action between the first single-point actuator and the mobile carrier 120. The travel of the single-point driving method is twice that of the two-point driving method. Therefore, the mobile carrier 120 can obtain a larger moving travel and improve the autofocus performance.

[0057] Referring to Figures 13 - 14 as shown, in one embodiment, the movable end 142 includes a first connecting section 1421, a second connecting section 1422, and a bent section 1423 connected between the two. The first connecting section 1421 and the second connecting section 1422 protrude in two directions relative to the bent section 1423, and at least the first connecting section 1421 has an elastic structure. A part of the first connecting section 1421 is fixed to the aforementioned fixed block 112, so that the other part of the first connecting section 1421 is in a suspended state. The second connecting section 1422 protrudes in a direction away from the fixed block 112. Referring to Figure 13 as shown. At the same time, the second connecting section 1422 also protrudes downward. One end of the SMA wire 143 is connected to the second connecting section 1422 and extends along the first connecting section 1421. When the SMA wire 143 is energized and contracts, it applies a force to the second connecting section 1422 to pull it downward and act on the moving carrier 120.

[0058] Combined with Figure 10 as shown, the thickness directions of the first connecting section 1421 and the second connecting section 1422 are along the Z-axis direction. Their stiffnesses along the Z-axis direction are less than the stiffnesses perpendicular to the Z-axis direction. When the SMA wire 143 is energized and contracts, it can pull the first connecting section 1421 to deform, causing the second connecting section 1422 to move downward and act on the moving carrier 120 to push it to move. The displacement of the second connecting section 1422 pushing the moving carrier 120 to move is larger than the contraction amount of the SMA wire 143. Thus, the moving carrier 120 has a larger moving stroke, and the single-point drive further amplifies the moving stroke, thereby improving the autofocus accuracy. In addition, the stiffness settings of the first connecting section 1421 and the second connecting section 1422 can prevent the autofocus mechanism 100 from causing the SMA wire 143 to be pulled too much and break when receiving a large impact force.

[0059] Continuing to combine with Figures 13 - 14 as shown, in one embodiment of the present invention, the structure of the fixed end 141 is the same as that of the movable end 142, that is, the fixed end 141 also includes a first connecting section 1411, a second connecting section 1412, and a bent section 1413 connected between the two. The first connecting section 1411 and the second connecting section 1412 of the fixed end 141 are both fixed to the fixed block 112, making it immovable as a whole. Its second connecting section 1412 protrudes in a direction away from the movable end 141. That is, the second connecting sections 1412 of the fixed end 141 and the movable end 141 are located at opposite ends. The two ends of the SMA wire 143 are respectively connected to the second connecting sections 1412 of the fixed end 141 and the movable end 141.

[0060] Combined with Figure 11As shown, the fixing block 112 has a stepped first fixing portion 1121 and a second fixing portion 1122, and the first fixing portion 1121 is lower than the second fixing portion 1122. During installation, the bent section 1423 of the fixed end 141 is clamped at the stepped position of the first fixing portion 1121 and the second fixing portion 1122, and the second connecting section 1412 of the fixed end 141 is fixed to the second fixing portion 1122, and its first connecting section 1411 is fixed to the first fixing portion 1121. Refer to Figures 13 - 14 shown. Correspondingly, the end of the first connecting section 1421 of the movable end 142 is fixed to the first fixing portion 1121, other parts of the first connecting section 1421 are in a suspended state, and the second connecting section 1422 protrudes away from the fixing block 112, so that the movable end 142 and the fixed end 141 are in a symmetrical structure. Refer to Figures 13 - 14 shown.

[0061] In the present invention, the fixed end 141 and the movable end 142 are respectively formed by two identical elastic sheets combined. One of the elastic sheets is integrally fixed to the fixing block 112 to form the fixed end 141, and one end of the other elastic sheet is fixed to the fixing block 112, and other parts are suspended to form the movable end 142. This structural setting is convenient for production and processing and is beneficial to reducing production costs. It can be understood that the fixed end 141 is not limited to being formed by fixing the aforementioned elastic sheet, and the function of the first single-point actuator 140 is not affected by other structural settings.

[0062] Continue to combine with Figure 10 、 Figures 13 - 14 shown, in the present invention, the first single-point actuator 140 further includes a pushing block 144, and the pushing block 144 is formed by an insulating material. A clamping groove is also formed on the pushing block 144. During connection, the pushing block 144 is clamped to the second connecting section 1422 of the movable end 142 through the clamping groove, and the pushing block 144 protrudes downward. By using the pushing block to push the moving carrier 120, the functions of insulation and wear prevention can be achieved. Of course, the connection method of the pushing block 144 is not limited. For example, the pushing block 144 can also be directly pasted on the movable end 142.

[0063] It can be understood that the pushing block 144 is not limited to the aforementioned structure. For example, in other embodiments, a pushing protrusion can also be integrally formed on the movable end 142, and an insulating layer can be correspondingly provided on the side surface of the pushing protrusion or / and the moving carrier 120 to achieve the insulating effect.

[0064] Next, continue to combine with Figure 10 、 Figures 13 - 14As shown, in the present invention, a driving part 122 is provided on the moving carrier 120. The driving part 122 protrudes in a direction perpendicular to the optical axis and is vertically opposite to the pushing block 144. The shape of the driving part 122 is not specifically limited herein. When the moving end 142 of the first single-point actuator 140 moves, the pushing block 144 acts on the driving part 122, thereby driving the moving carrier 120 to move along the optical axis direction (Z-axis direction). Only one first single-point actuator 140 is required for single-point driving to achieve the movement of the moving carrier 120 in the Z-axis direction. This not only reduces the number of driving mechanisms, simplifies the structure of the focusing mechanism 100, and reduces the production cost, but also increases the moving stroke and improves the adjustment accuracy.

[0065] As shown in the following in conjunction with Figures 2 - 4 As shown, in the anti-shake mechanism 200 of the present invention, opposite side walls of the base 210 have second protrusions 213 protruding towards each other, and the second protrusions 213 are provided at the top position of the base 210. When the focusing mechanism 100 is installed in the base 210, the first protrusions 113 on its support base 110 are arranged in a staggered manner with the second protrusions. Then, the second suspension units 220 are respectively connected to the first protrusions 113 and the second protrusions 213, thereby suspending the focusing mechanism 100 in the base 210, enabling the focusing mechanism 100 to move within the base 210. This nested structure of the focusing mechanism 100 and the anti-shake mechanism 200 makes the structure of the camera module 1 compact, reduces the volume, and is beneficial to miniaturized design.

[0066] Refer to Figures 3 - 8 As shown, in the present invention, the base 210 has four side walls, and a third protrusion 211 protrudes from the middle of each side wall, so that two long first openings 212 are formed on each side wall of the base 210. The second single-point actuator 230 is installed on the third protrusion 211, and its moving end 142 is suspended corresponding to the first opening 212, and its fixed end 141 is fixed to the side wall (details will be described later).

[0067] It can be understood that the side wall structure of the base 210 is not limited to the above, and other structures can also be set to install the second single-point actuator 230 and do not affect the realization of its function.

[0068] As shown in the following in conjunction with Figures 3 - 4 As shown, in the present invention, the second suspension unit 220 includes two suspension elastic pieces 220a and 220b. The structures of the two suspension elastic pieces 220a and 220b are the same, and they are symmetrically installed on the second protrusions 213 of the base 210. The other ends of the suspension elastic pieces 220a and 220b are connected to the first protrusions 113 of the focusing mechanism 100.

[0069] Refer to Figure 4As shown, the suspension elastic pieces 220a and 220b both include a first cantilever 221 and at least one second cantilever 222 arranged at an angle. The first cantilever 221 and the second cantilever 222 are both of elastic structures. The first cantilever 221 is connected to the second bump 213 of the base 210, and the second cantilever 222 is connected to the first bump 113 of the focusing mechanism 100, thereby suspending the focusing mechanism 100 inside the base 210. When the focusing mechanism 100 moves, the first cantilever 221 or / and the second cantilever 222 can be deformed, and when the first cantilever 221 or / and the second cantilever 222 restores deformation, it can drive the focusing mechanism 100 to reset. There is no friction during the movement of the focusing mechanism 100, so the anti-shake accuracy and anti-shake performance can be improved.

[0070] Continue to refer to Figures 3 - 4 As shown, in a specific embodiment, each of the suspension elastic pieces 220a and 220b includes a first cantilever 221 and two second cantilevers 222. The two second cantilevers 222 are respectively connected to both ends of the first cantilever 221, and the two second cantilevers 222 are both perpendicular to the first cantilever 221. The first cantilever 221 and the second cantilever 222 are both of elastic structures. During installation, the first cantilever 221 is fixed to the second bump 213 of the base 210, and the two second cantilevers 222 are respectively connected to the first bump 113 of the focusing mechanism 100, so that the first cantilever 221 and the second cantilever 222 are respectively spaced from the base 210 and the focusing mechanism 100. When the focusing mechanism 100 moves, the first cantilever 221 or / and the second cantilever 222 can be deformed, and when the first cantilever 221 or / and the second cantilever 222 restores deformation, it can drive the focusing mechanism 100 to quickly reset.

[0071] Combined with Figures 2 - 4 As shown, the length of the first cantilever 221 is slightly greater than the side length of the support base 110, and at the same time slightly less than the side length of the inner surface of any side wall of the base 210. In addition, the length of the second cantilever 222 is less than half of the side length of the focusing mechanism 100. In this way, after the suspension elastic pieces 220a and 220b are fixed to the second bump 213 of the base 210, the first cantilever 221 extends along the side wall of the base 210 provided with the second bump 222, and the first cantilever 221 is spaced from the side wall of the base 210 (see Figure 2 ); the two second cantilevers 222 respectively extend along the adjacent two side walls, and the second cantilever 222 is also spaced from the side wall of the base 210. The end parts of the two second cantilevers 222 are respectively fixed to the first bump 113 of the focusing mechanism 100 (see Figure 2 ). This setting of the first cantilever 221 and the second cantilever 222 suspends the focusing mechanism 100 as a whole in the base 210, provides a moving space for the focusing mechanism 100, and at the same time makes the structure of the camera module 1 compact.

[0072] Combined with Figures 2 - 4As shown, more preferably, the stiffness of the first cantilever 221 and the second cantilever 222 in the Z-axis direction is greater than that in the direction perpendicular to the Z-axis, so that the suspension elastic pieces 220a and 220b have better shock resistance. Specifically, when the camera module 1 is impacted in the Z-axis direction, the suspension elastic pieces 220a and 220b can limit the displacement in the Z-axis direction within a smaller range. Through the action of the two suspension elastic pieces 220a and 220b, when receiving a large impact force, it can prevent the focusing mechanism 100 from colliding with other components and causing damage or jamming of the focusing mechanism 100, effectively ensuring that the positions of the components in the camera module 1 are within a safe range and improving reliability.

[0073] The following will be combined with Figures 3 - 7 As shown, in an embodiment of the present invention, the anti-shake mechanism 200 includes four second single-point actuators 230a to 230d with the same structure. The four second single-point actuators 230a to 230d are respectively installed on the four side walls of the base 210, that is, provided on the side of the focusing mechanism 100, which can reduce the thickness of the camera module 1 and is beneficial to the miniaturization of the device volume; and each of the second single-point actuators 230a to 230d is a single-point drive structure, that is, there is only one acting point between each of the second single-point actuators 230a to 230d and the focusing mechanism 100, so that the moving stroke of the focusing mechanism 100 is larger, realizing anti-shake adjustment at a larger angle.

[0074] Combined with Figures 4 - 7 As shown, in an embodiment of the present invention, the movable ends 142 (see details later) of the two second single-point actuators 230a and 230b are located at a vertex position on the first diagonal line L1 of the base 210, while the movable ends 142 (see details later) of the other two second single-point actuators 230c and 230d are located at another vertex position on the first diagonal line L1; the fixed ends 231 of the four second single-point actuators 230a to 230d are located at the two vertices of the second diagonal line L2 of the base 210, and the first diagonal line L1 intersects with the second diagonal line L2, referring to Figures 6 - 7 As shown. By driving the support base 110 to translate or rotate through the four second single-point actuators 230a to 230d, since the single-point drive structure has a larger moving stroke compared with the double-point drive structure, it can drive the focusing mechanism 100 to generate a larger moving stroke, improving the anti-shake accuracy.

[0075] It can be understood that the number of the second single-point actuators 230 is not limited to four, nor is it limited to the above setting method. Through other arrangement methods, the focusing mechanism 100 can also be driven to translate or rotate.

[0076] The following will be combined with Figures 3 - 7 , Figure 9As shown, in the present invention, the four second single-point actuators 230a to 230d each include a fixed end 231, a movable end 232, and an SMA wire 233. The fixed end 231 and the movable end 142 are both mounted on the third protrusion 211 of the base 210, and the movable end 142 is suspended corresponding to the position of the first opening 212. The two ends of the SMA wire 233 are respectively connected to the fixed end 231 and the movable end 232. The SMA wire 233 extends along the side wall of the mounting frame 110. The fixed end 231 and the movable end 232 are respectively electrically connected to the power supply component to supply power to the SMA wire 233. When the SMA wire 233 is energized and contracts, it drives the movable end 232 to move to act on the lower housing 150 of the focusing mechanism 100, while the fixed end 231 remains stationary, thus forming a single-point drive. The stroke of the single-point drive mode is twice that of the two-point drive mode. Therefore, the focusing mechanism 100 can obtain a larger moving stroke and improve the anti-shake performance.

[0077] Combined with Figure 6 、 Figure 9 As shown, the other specific structures of each second single-point actuator 230 are the same as those of the above-mentioned first single-point actuator 130, so they will not be described repeatedly. During installation, the fixed ends 231 of the second single-point actuators 230a to 230d are all fixed to the side wall of the base 210. Specifically, the bent section 2313 of the fixed end 231 is clamped on the side wall, so that its second connecting section 2312 extends into the side wall and is fixed to the side wall (see Figure 6 ), and its first connecting section 2311 is correspondingly arranged corresponding to the opening 212 and the end is fixed to the third protrusion 211. Symmetrically, the end of the first connecting section 2321 of the movable end 232 is fixed to the third protrusion 211. The other part of the first connecting section 2321 and the second connecting section 2322 are both suspended corresponding to the first opening 212. The second connecting section 2322 of the movable end 232 protrudes in a direction away from the fixed end 231, so that the second connecting section 2312 of the fixed end 231 and the second connecting section 2322 of the movable end 232 are located at opposite ends. The SMA wire 143 extends along the side wall and its two ends are respectively connected to the second connecting section 2312 of the fixed end 231 and the second connecting section 2322 of the movable end 232. See Figure 6 as shown.

[0078] Continuing to combine with Figures 5 - 7 、 Figure 9As shown, in one embodiment, each of the second single-point actuators 230a - 230d further includes a pushing block 234, which is formed of an insulating material. A clamping groove is also formed on the pushing block 234, and the pushing block 234 is clamped to the second connecting section 2322 of the movable end 232 through the clamping groove. The pushing block 234 protrudes into the interior of the base 210, and the focusing mechanism 100 can be pushed by the pushing block 234, so as to realize the functions of insulation and anti-wear. Of course, the connection method of the pushing block 234 is not limited. For example, the pushing block 234 can also be directly pasted on the movable end 232.

[0079] Continuing to combine Figures 5 - 7 、 Figure 9 As shown, in one embodiment, each of the second single-point actuators 230a - 230d further includes two reinforcing pieces 235, which are respectively fixed to the ends of the first connecting section 2311 of the fixed end 231 and the first connecting section 2321 of the movable end 232. At the same time, both of the two reinforcing pieces 235 are fixed to the third protrusion 211. The reinforcing pieces 235 are used for electrically connecting the power supply components, and the SMA wire 233 is powered through the reinforcing pieces 235, the fixed end 231, and the movable end 232.

[0080] Similarly, the fixed end 231 and the movable end 232 of the second single-point actuators 230a - 230d are respectively formed by two identical elastic pieces. One of the elastic pieces is integrally fixed to the side wall to form the fixed end 231, and one end of the other elastic piece is fixed to the side wall, and the other part is suspended to form the movable end 232. This structural setting is convenient for production and processing and is beneficial to reducing production costs. It can be understood that the fixed end 231 is not limited to being formed by fixing the foregoing elastic piece, and the function of the second single-point actuator 230 is not affected by other structural settings.

[0081] It can be understood that the two elastic pieces can also be designed as an integral structure, that is, the closer ends of the two elastic pieces or the reinforcing pieces 235 are fixedly connected or integrally formed, which does not affect the realization of the functions of the second single-point actuators 230a - 230d.

[0082] Next, once again combining Figures 1 - 14 shown, the working principle of the camera module 1 of the present invention will be described.

[0083] First, combining Figures 1 - 7 shown, when the camera module 1 needs to realize the anti-shake function, first, the SMA wires 233 of the second single-point actuators 230a - 230d are all powered on, so that the SMA wires 233 of the second single-point actuators 230a - 230d contract when powered on, thereby pulling the movable ends 232 of the four to deform and move towards the focusing mechanism 100, and the pushing blocks 234 of the four all come into contact with the lower housing 150 of the focusing mechanism 100.

[0084] Combined Figures 5 - 7 As shown, for example, when the focusing mechanism 100 needs to move in the positive direction of the X-axis, the current passing through the SMA wire 233 of the second single-point actuator 230d is increased, and the force F1 exerted on the focusing mechanism 100 by the push block 234 on its movable end 232 is increased. Refer to Figure 7 As shown. At the same time, the current passing through the second single-point actuator 230b is decreased, so that the force F2 exerted on the focusing mechanism 100 by its push block 234 is decreased. During this process, a moment in the clockwise direction in Figure 7 is generated. To eliminate this moment and enable the focusing mechanism 100 to translate in the positive direction of the X-axis, the second single-point actuators 230c and 230c also need to exert forces, as follows:

[0085] The current of the SMA wires 233 of the second single-point actuators 230a and 230c is increased. The SMA wires 233 of the second single-point actuators 230a and 230c contract, pulling the movable ends 232 of both towards the focusing mechanism 100. The push blocks 234 on the movable ends 232 of both act on two opposite sides of the focusing mechanism 100, specifically on the two top corners on the first diagonal line L1. Thus, opposite-direction forces F3 and F4 are generated on the focusing mechanism 100. And the forces F3 and F4 exerted by the second single-point actuators 230a and 230c are increased compared to the force F2. At the same time, the currents of the second single-point actuators 230a and 230c are kept the same to make the forces F3 and F4 the same, thereby canceling the above-mentioned clockwise moment. Therefore, the second single-point actuator 230d can push the focusing mechanism 100 to translate in the positive direction of the Figure 7 X-axis in

[0086] When the focusing mechanism 100 needs to translate in other directions, the principle is the same as the above method, so it will not be described repeatedly here.

[0087] When the focusing mechanism 100 needs to be driven to rotate, for example, when it needs to rotate in the clockwise direction (the direction indicated by the arrow) in Figure 7 , the currents of the second single-point actuators 230d and 230b are increased simultaneously and kept the same. The movable ends 232 of the second single-point actuators 230d and 230b continue to move, and the push blocks 234 on the movable ends 232 push against the two top corners on the first diagonal line L1 of the focusing mechanism 100. The forces F1 and F2 exerted on the focusing mechanism 100 by the second single-point actuators 230d and 230b are increased simultaneously and are equal. At the same time, the currents of the second single-point actuators 230a and 230c are decreased simultaneously and kept equal. Therefore, the forces F3 and F4 exerted by both on the focusing mechanism 100 are decreased simultaneously and are equal. Thus, the focusing mechanism 100 is pushed to rotate in the clockwise direction in Figure 7 .

[0088] Accordingly, when the focusing mechanism 100 needs to rotate counterclockwise along Figure 7 the above, the principle is the same as the above method, so it will not be described repeatedly.

[0089] During the translation or rotation of the focusing mechanism 100, each of the second single-point actuators 230a to 230d is driven by a single point, enabling the focusing mechanism 100 to have a larger moving stroke and improving the anti-shake accuracy. Moreover, during the translation or rotation of the focusing mechanism 100, the first cantilevers 221 and second cantilevers 222 of the suspension elastic pieces 220a and 220b of the second suspension unit 220 are deformed, meeting the requirements of the translation or rotation of the focusing mechanism 100, realizing the multi-degree-of-freedom movement of the focusing mechanism 100, and achieving a good anti-shake effect. In addition, the focusing mechanism 100 is suspended in the base 210 without friction, so the anti-shake accuracy and anti-shake performance can be improved.

[0090] The following combines Figures 1 - 3 and Figures 10 - 14 As shown, when the camera module 1 needs to implement the autofocus function, for example, when the focusing mechanism 100 needs to move in the negative direction of the Z axis, the SMA wire 143 of the first single-point actuator 140 is energized. The energized SMA wire 143 contracts and pulls its movable end 142 downward. The push block 144 on the movable end 142 pushes the driving part 122 on the moving carrier 120, so that the moving carrier 120 moves downward, realizing the movement in the optical axis direction (negative direction of the Z axis) to achieve autofocus. The moving carrier 120 is in a suspended state and does not generate friction during its movement, so the focusing accuracy can be improved. Moreover, the single-point drive of the first single-point actuator 140 enables the moving carrier 120 to have a larger moving stroke, thereby improving the accuracy of autofocus.

[0091] During the downward movement of the moving carrier 120, the upper elastic piece 131 and lower elastic piece 132 of the first suspension unit 130 are deformed. After the SMA wire 143 of the first single-point actuator 140 is powered off, the movable end 142 rebounds upward under the action of its own elastic force. At the same time, the upper elastic piece 131 and lower elastic piece 132 recover their deformation and drive the moving carrier 120 to move upward and reset.

[0092] In summary, for the camera module 1 of the present invention, firstly, the focusing mechanism 100 and the anti-shake mechanism 200 are integrated to simultaneously achieve the functions of autofocus and anti-shake, improving the performance of the camera module 1; secondly, the focusing mechanism 100 is movably accommodated in the base 210 of the anti-shake mechanism 200 and is suspended by the second suspension unit 220. Each second single-point actuator 230 is installed on the side wall of the base 210. By driving the focusing mechanism 100 to translate or rotate in a plane perpendicular to the optical axis through each second single-point actuator 230, the nested structure setting and the installation of each second single-point actuator 230 on the side of the focusing mechanism 100 make the overall structure of the camera module 1 more compact, which is beneficial to the miniaturization of the device volume; furthermore, the focusing mechanism 100 is suspended in the base 210, and the moving carrier 120 of the focusing mechanism 100 is suspended on its support base 110 through the first suspension unit 130. This suspension setting makes there be no friction during the movement of the focusing mechanism 100 and its moving carrier 120, improving the anti-shake performance and the autofocus performance; finally, both the first single-point actuator 140 and the second single-point actuator 230 are single-point drive structures, so that both the focusing mechanism 100 and its moving carrier 120 can have a larger stroke range, further improving the anti-shake accuracy and the autofocus accuracy.

[0093] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A camera module, characterized in that, Comprising: A focusing mechanism, which includes a support base, a moving carrier, a first suspension unit, and a first single-point actuator. The moving carrier is suspended from the support base by the first suspension unit. The first single-point actuator is mounted on the support base and located on one side of the moving carrier. The first single-point actuator is used to drive the moving carrier to move along the optical axis direction; An anti-shake mechanism, which includes a base, a second suspension unit, and at least two second single-point actuators. The second suspension unit is connected to the base. The focusing mechanism is movably accommodated in the base and the support base is connected to the second suspension unit. Each of the second single-point actuators is mounted on the side wall of the base. By each of the second single-point actuators, the focusing mechanism is driven to translate or rotate in a plane perpendicular to the optical axis; The first single-point actuator and the second single-point actuator both include a fixed end, a movable end, and an SMA wire. The movable end is of an elastic structure. The two ends of the SMA wire are respectively connected to the fixed end and the movable end. When the SMA wire is energized and contracts, it drives the movable end to move. When the SMA wire is de-energized, the movable end can be reset under the action of its own elastic force; wherein, the movable end includes a first connecting section, a second connecting section, and a bending section connecting the two. At least the first connecting section is of an elastic structure. A part of the first connecting section is fixed to the support base or the base, and another part of the first connecting section is in a suspended state. One end of the SMA wire is connected to the second connecting section and extends along the first connecting section. When the SMA wire is energized and contracts, it applies a force to the second connecting section to pull it to move and act on the moving carrier or the focusing mechanism.

2. The camera module according to claim 1, wherein One end of the support base is provided with a fixing block. The fixed end of the first single-point actuator is fixed to the fixing block. One end of the movable end of the first single-point actuator is fixed to the fixing block, so that the other end of the movable end of the first single-point actuator is in a suspended state and protrudes in a direction away from the fixed end. The suspended end of the movable end of the first single-point actuator is connected to the SMA wire.

3. The camera module according to any one of claims 1-2, characterized in that, A driving part is provided on the moving carrier. The driving part protrudes in a direction perpendicular to the optical axis. The movable end of the first single-point actuator acts on the driving part to drive the moving carrier to move along the optical axis direction.

4. The camera module according to any one of claims 1-2, characterized in that, The anti-shake mechanism has four of the second single-point actuators. The movable ends of the four second single-point actuators are located at two vertices on the first diagonal line of the base. The fixed ends of the four second single-point actuators are located at two vertices on the second diagonal line of the base. The second diagonal line intersects with the first diagonal line.

5. The camera module according to claim 1, wherein The first suspension unit includes an upper elastic sheet and a lower elastic sheet which are of elastic structures. The upper elastic sheet and the lower elastic sheet are respectively connected to the upper and lower ends of the moving carrier in the optical axis direction, and the upper elastic sheet and the lower elastic sheet are also respectively connected to the support base, so as to suspend the moving carrier on the support base. When the moving carrier moves in the optical axis direction, the upper elastic sheet and the lower elastic sheet are driven to deform, and the upper elastic sheet and the lower elastic sheet restore the deformation to drive the moving carrier to reset.

6. The camera module according to claim 5, wherein, One end of the support base is convexly provided with two spaced fixed columns. The upper elastic sheet is connected to one end of the fixed column close to the support base and is spaced from the support base, and the lower elastic sheet is connected to one end of the fixed column far from the support base.

7. The camera module according to claim 1, wherein, The second suspension unit includes at least two suspension elastic sheets. At least two of the suspension elastic sheets are uniformly arranged around the optical axis. Two ends of the suspension elastic sheet are respectively connected to the base and the support base.

8. The camera module according to claim 7, characterized in that, The suspension elastic sheet includes a first cantilever and at least one second cantilever which are arranged at an angle. The first cantilever and the second cantilever are both of elastic structures. The first cantilever is connected to the base, and the second cantilever is connected to the support base. Also, the first cantilever and the second cantilever are both spaced from the base and the support base. When the focusing mechanism moves, the first cantilever or / and the second cantilever can be driven to deform, and the first cantilever or / and the second cantilever restores the deformation to drive the focusing mechanism to reset.

9. The camera module according to claim 8, wherein, An outer wall of the support base is convexly provided with a first convex block, and an inner wall of the base is convexly provided with a second convex block. The first convex block and the second convex block are arranged in a staggered manner. The first cantilever is connected to the second convex block, and the second cantilever is connected to the first convex block.

10. A single-point actuator, characterized in that, The structure of the single-point actuator is the same as that of the first single-point actuator and the second single-point actuator, and this single-point actuator is applied to the camera module according to any one of claims 1 to 9. The single-point actuator includes a fixed end, a movable end and an SMA wire. The movable end is of an elastic structure. Two ends of the SMA wire are respectively connected to the fixed end and the movable end. When the SMA wire is energized and shrinks, it drives the movable end to move. When the SMA wire is de-energized, the movable end can reset under the action of its own elastic force.

11. The single-point actuator according to claim 10, wherein The movable end includes a first connection section, a second connection section and a bending section connected between the two. At least the first connection section is of an elastic structure. One end of the SMA wire is connected to the second connection section and extends along the first connection section. When the SMA wire is energized and shrinks, it applies a force to the second connection section to pull it to move.

12. The single-point actuator according to claim 11, wherein It further includes a pushing block. The pushing block is connected to the second connection section and is of an insulating structure. The protruding direction of the pushing block is the same as the moving direction of the second connection section when the second connection section is pulled by the SMA wire.

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