Lens drive device

Abstract

The present invention belongs to the technical field of optical imaging equipment, and specifically relates to a lens driving device, including a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism. A cross shaft and a preload structure are provided between the prism carrier and the base, and the preload structure includes: an elastic reset member, respectively connecting the bottom end of the prism carrier and the inner bottom end of the base; an adsorption component, having a first adsorption member and a second adsorption member arranged oppositely, one of the first adsorption member and the second adsorption member is arranged at the bottom end of the prism carrier and the other is arranged at the inner bottom end of the base, and the first adsorption member and the second adsorption member are any one of an adsorption magnet and an adsorption iron sheet. The present invention sets a preload structure between the prism carrier and the base so that the prism carrier can have a downward preload, so that the cross shaft has a better abutment fulcrum effect, and at the same time, the preload can assist the prism carrier in resetting after nodding and shaking.

Description

Technical Field

[0001] The invention belongs to the technical field of optical imaging equipment, and in particular relates to a lens driving device. Background Art

[0002] With the development of technology, many electronic devices (such as smart phones or digital cameras) now have the function of taking photos or recording videos. The use of these electronic devices is becoming more and more common, and they are developing in the direction of convenient and thin designs to provide users with more choices.

[0003] Among them, the lens driving device is used in lightweight design because it can greatly reduce the thickness and weight of the entire device. The structure of the lens driving device usually includes two parts, namely the lens part and the prism part, wherein the prism part is arranged at the front end, and the imaging chip is arranged at the rear end of the lens part. The light is reflected by the prism part to convert the light path to the lens part, and then zoomed by the lens part to the imaging chip.

[0004] Specifically, the prism part can usually nod and shake its head on the base to change the angle of light. These actions require the prism magnet and the prism coil that cooperates with it to be realized. How to achieve stable nodding and shaking actions of the prism part is a problem that needs to be solved at present. Summary of the invention

[0005] The present invention aims to solve the above technical problems and provides a lens driving device.

[0006] A lens driving device comprises a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism, wherein the lens carrier and the prism carrier are arranged in the base along a first direction, and a cross axis is arranged between the prism carrier and the base;

[0007] The zoom driving mechanism drives the lens carrier to move along a first direction, and the prism driving mechanism drives the prism carrier to move around the first direction and a second direction perpendicular to the first direction with the cross axis as a fulcrum;

[0008] A pre-tightening force structure is also provided between the prism carrier and the base, and the pre-tightening force structure comprises:

[0009] An elastic reset member, respectively connecting the bottom end of the prism carrier and the inner bottom end of the base;

[0010] The adsorption component comprises a first adsorption component and a second adsorption component which are arranged relatively to each other, wherein one of the first adsorption component and the second adsorption component is arranged at the bottom end of the prism carrier and the other is arranged at the bottom end inside the base, and the first adsorption component and the second adsorption component are any one of an adsorption magnet and an adsorption iron sheet.

[0011] Optionally, the elastic reset member is one or more damping rubbers, and the damping rubbers are arranged at the inner bottom end of the base;

[0012] The bottom end of the prism carrier is provided with a damping glue contact convex point corresponding to the damping glue, and the damping glue contact convex point is in contact with the damping glue.

[0013] Optionally, the elastic return member is a leaf spring, the leaf spring is a sheet-like structure, the leaf spring is fixed on the base, and the four end corners of the leaf spring are respectively fixed to the bottom end of the prism carrier via spring wires.

[0014] Optionally, the reed serves as one of the first adsorbing member and the second adsorbing member and is arranged opposite to the other one arranged at the bottom end of the prism carrier.

[0015] Optionally, the prism driving mechanism includes two prism coils arranged at the rear side of the base along the second direction and two prism magnets arranged at the rear end of the prism carrier along the second direction, and one of the prism coils is arranged opposite to a corresponding one of the prism magnets.

[0016] Optionally, support grooves are provided on both sides of the prism carrier, a cross-axis mounting groove is provided at the bottom end of the prism carrier, and the cross-axis is installed in the cross-axis mounting groove;

[0017] The cross axis includes a nodding rod extending along the second direction and a shaking rod extending along the first direction. Both ends of the nodding rod are arranged on support platforms on both sides of the base. One of the support platforms extends into a corresponding support groove and supports the nodding rod.

[0018] Optionally, the elastic return member is a spring leaf, the spring leaf is a frame-type structure, the middle part of the side of the spring leaf is fixed on the base, and the four end corners of the spring leaf are fixed on the bottom end of the prism carrier.

[0019] Optionally, the spring sheet has a plurality of support sheets, each of the support sheets is connected to form a frame structure by a spring wire, a part of the support sheets is fixed on the base as a base support sheet, and another part of the support sheets is fixed on the bottom end of the prism carrier as a prism carrier support sheet;

[0020] The base is provided with a spring preload avoidance groove corresponding to the spring wire and the prism carrier support piece, and the spring wire and the prism carrier support piece can be located in the spring preload avoidance groove.

[0021] Optionally, the prism driving mechanism includes a nodding coil arranged at the bottom inner portion of the base, a shaking coil arranged on the side wall of the base, a nodding magnet arranged at the bottom end of the prism carrier, and a shaking magnet arranged on the side wall of the prism carrier, the nodding coil and the nodding magnet being arranged opposite to each other, and the shaking coil and the shaking magnet being arranged opposite to each other.

[0022] Optionally, the nodding magnet at the bottom end of the prism carrier serves as one of the first adsorption component and the second adsorption component and is arranged opposite to the other one arranged below the nodding coil.

[0023] Optionally, the prism driving mechanism includes a nodding coil arranged on the inner rear side of the base, a shaking coil arranged on the side wall of the base, a nodding magnet arranged on the rear side of the prism carrier, and a shaking magnet arranged on the side wall of the prism carrier, the nodding coil and the nodding magnet are arranged opposite to each other, and the shaking coil and the shaking magnet are arranged opposite to each other.

[0024] Optionally, a shaking head magnet mounting groove is provided on one side of the prism carrier, the shaking head magnet is installed in the shaking head magnet mounting groove, a supporting groove is provided near the middle position of one side of the prism carrier and on the opposite side, and a cross shaft mounting groove is provided at the bottom end of the prism carrier, and the cross shaft is installed in the cross shaft mounting groove;

[0025] The cross axis includes a nodding rod extending along the second direction and a shaking rod extending along the first direction. Both ends of the nodding rod are arranged on support platforms inside the base. One of the support platforms extends into a corresponding support groove and supports the nodding rod.

[0026] Optionally, a magnetic attraction portion bent upward is provided on one side of the reed, and the magnetic attraction portion extends into the support groove on one side and is located on a side close to the shaking head magnet;

[0027] The supporting groove on one side is connected to the shaking head magnet installation groove through a magnetic avoidance groove.

[0028] Optionally, a bending portion bending upward is provided on one side of the reed sheet, the bending portion is located outside the magnetic attraction portion, the outer side wall of the bending portion contacts the inner side wall of the base, and the bending portion is located at the bottom end of the shaking head magnet.

[0029] Optionally, the zoom driving mechanism includes a lens coil arranged on the side wall of the base and a lens magnet arranged on the side wall of the lens carrier, and the lens coil and the lens magnet are arranged opposite to each other.

[0030] Optionally, one or more ball grooves are respectively provided on both sides of the bottom end of the base and on one side of the bottom end of the lens carrier, and balls are installed in the ball grooves. A ball supporting plane is provided on the other side of the bottom end of the lens carrier, and the upper and lower ends of the balls on one side are respectively in contact with the upper and lower ball grooves on the same side, and the top end of the balls on the other side are in contact with the ball supporting plane and the bottom end is in contact with the ball groove at the bottom of the same side.

[0031] Optionally, the ball groove is a V-shaped groove, an arc groove or a plane groove.

[0032] Beneficial effects: The present invention has at least one or more of the following advantages: The present invention sets a preload structure between the prism carrier and the base so that the prism carrier can have a downward preload, so that the cross axis has a better abutment fulcrum effect, and at the same time, the preload can assist the prism carrier to reset after nodding or shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is an exploded view of the structure of Embodiment 1 of the present invention;

[0034] Figure 2 for Figure 1 Further exploded diagram of;

[0035] Figure 3 for Figure 2 A schematic diagram of a partial structure from another angle;

[0036] Figure 4 for Figure 3 Another structural diagram of the middle base from another angle;

[0037] Figure 5 for Figure 3 Another structural diagram of the prism carrier and the lens carrier at another angle;

[0038] Figure 6 for Figure 5 Exploded view of the medium prism carrier;

[0039] Figure 7 for Figure 5 Another structural diagram of the middle prism carrier from another angle;

[0040] Figure 8 This is an exploded view of the structure of Embodiment 2 of the present invention;

[0041] Fig. 9 for Figure 8 Further exploded diagram of;

[0042] Fig.10 for Fig. 9 Another structural diagram of the middle base from another angle;

[0043] Fig.11 for Fig. 9 Another structural diagram of the prism carrier and the lens carrier at another angle;

[0044] Fig.12 for Fig.11 Another structural diagram of the middle prism carrier from another angle;

[0045] Fig.13 This is a front view of Embodiment 3 of the present invention;

[0046] Fig.14 for Fig.13 AA section view;

[0047] Fig.15 for Fig.13 Exploded diagram of

[0048] Fig.16 for Fig.15 Further exploded diagram of;

[0049] Fig.17 for Fig.16 Another structural diagram of the middle base from another angle;

[0050] Fig.18 for Fig.17 Exploded diagram of

[0051] Fig.19 for Fig.16 Another structural diagram of the middle prism carrier from another angle;

[0052] Fig. 20 for Fig.19 Further exploded diagram of;

[0053] Fig.21 for Fig. 20 Further exploded diagram of;

[0054] Fig. 22 for Fig.21 A schematic diagram of the structure of the middle reed;

[0055] Fig.23 for Fig.16 Another structural diagram of the lens carrier at another angle;

[0056] Fig.24 This is a front view of Embodiment 4 of the present invention;

[0057] Fig.25 for Fig.24 BB cross-sectional view;

[0058] Fig.26 for Fig.24 Exploded diagram of

[0059] Fig. 27 for Fig.26 Further exploded diagram of;

[0060] Fig.28 for Fig. 27 Another structural diagram of the middle base from another angle;

[0061] Fig.29 for Fig. 27 Another structural diagram of the prism carrier and the lens carrier at another angle;

[0062] Fig.30 is a positional relationship diagram between the prism carrier, the reed and the adsorption magnet in Example 4 of the present invention;

[0063] Fig.31 for Fig.30 Exploded diagram. DETAILED DESCRIPTION

[0064] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0065] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0066] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0067] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0068] In the following description, the first direction is defined as the direction along the optical axis of the zoom lens, the second direction is defined as the direction perpendicular to the first direction and parallel to the lower surface of the base, and the third direction is defined as the direction perpendicular to the first direction and the second direction, that is, the third direction is the direction of the plumb line when the base is normally placed, that is, a coordinate system is established with the third direction as the Z-axis and the first direction as the X-axis, and the second direction is the Y-axis.

[0069] Embodiment 1:

[0070] Reference Figures 1 to 7 The present embodiment provides a lens driving device, which includes a base 10, a prism carrier 20, a lens carrier 30, a prism driving mechanism and a zoom driving mechanism.

[0071] The lens carrier 30 and the prism carrier 20 are arranged in the base 10 along the first direction. Specifically, a prism carrier accommodating cavity and a lens carrier accommodating cavity may be arranged in the base 10 along the first direction. The prism carrier 20 is used to install a prism and is arranged in the prism carrier accommodating cavity, and the lens carrier 30 is used to install a zoom lens and is arranged in the lens carrier accommodating cavity.

[0072] The zoom drive mechanism drives the lens carrier 30 to move along the first direction to realize the zoom function, and the prism drive mechanism drives the prism carrier 20 to move around the first direction and the second direction perpendicular to the first direction with the cross axis 60 as the fulcrum to realize the optical image stabilization function. The prism carrier 20 drives the prism to nod and shake, and the prism can turn the direction of the light passing through. The prism carrier 20 can move the prism to change the irradiation direction of the light. Among them, the nodding action refers to the action of the prism carrier 20 rotating around the second direction, and the shaking action refers to the action of rotating around the first direction.

[0073] A cross shaft 60 is provided between the prism carrier 20 and the base 10 . The prism carrier 20 nods and shakes its head with the cross shaft 60 as a fulcrum, making the movement of the prism carrier 20 easier and reducing the movement resistance of the prism carrier 20 .

[0074] A pre-tightening force structure is also provided between the prism carrier 20 and the base 10. The pre-tightening force structure includes an elastic reset member and an adsorption assembly. The elastic reset member is one or more damping glues 71, and the damping glue 71 is provided at the bottom end of the base 10. A damping glue contact convex point 711 corresponding to the damping glue 71 is provided at the bottom end of the prism carrier 20, and the damping glue contact convex point 711 contacts the damping glue 71. The first adsorption member in the adsorption assembly adopts an adsorption magnet 721, and the second adsorption member in the adsorption assembly adopts an adsorption iron sheet 722. The adsorption magnet 721 is provided at the bottom end of the prism carrier 20 and is located below the cross shaft 60. The adsorption iron sheet 722 is provided at the bottom end of the base 10. The adsorption magnet 721 and the adsorption iron sheet 722 are arranged opposite to each other, and an adsorption force is generated between the two, so that a pre-tightening force is generated between the prism carrier 20 and the base 10, so that the cross shaft has a better abutment fulcrum effect. At the same time, the damping glue 71 can play a reset effect after the prism carrier 20 is moved.

[0075] In one embodiment, a first adsorption magnet installation groove 27 is disposed at the bottom end of the prism carrier 20 . The first adsorption magnet installation groove 27 is located below the cross axis 60 , and the adsorption magnet 721 is installed in the first adsorption magnet installation groove 27 .

[0076] In one embodiment, referring to Figures 2 to 4 , Figure 7 The prism driving mechanism includes two prism coils 41 arranged at the rear side of the base 10 along the second direction and two prism magnets 42 arranged at the rear end of the prism carrier 20 along the second direction, and each prism coil 41 is arranged opposite to each corresponding prism magnet 42.

[0077] In this embodiment, a double-coil driving structure is adopted at the rear side of the base, and the two prism coils 41 correspond to the prism magnet 42 arranged at the rear end of the prism carrier 20. The cooperation of the two can make the prism carrier 20 realize the nodding action and the shaking action. Specifically, the prism carrier 20 is driven to nod or shake the head by controlling the direction of the current in the two prism coils 41. For example, if the current directions of the two prism coils 41 are the same, such as both are clockwise or both are counterclockwise, the prism carrier 20 can be driven to realize the nodding action. If the current directions of the two prism coils 41 are different, such as one is clockwise and the other is counterclockwise, the prism carrier 20 can be driven to realize the shaking action.

[0078] In one embodiment, referring to Figure 5 and Figure 6 Support grooves 21 are provided on both sides of the prism carrier 20 , a cross shaft mounting groove 22 is provided at the bottom end of the prism carrier 20 , and the cross shaft 60 is installed in the cross shaft mounting groove 22 .

[0079] The cross axis 60 includes a nodding rod 61 extending along the second direction and a shaking rod 62 extending along the first direction. Both ends of the nodding rod 61 are arranged on support platforms 11 on both sides of the base 10. Each support platform 11 extends into the corresponding support groove 21 and supports the nodding rod 61.

[0080] Specifically, when performing the nodding action, the prism carrier 20 drives the shaking rod 62 to perform the nodding action with the nodding rod 61 as a fulcrum. When performing the shaking action, the prism carrier 20 performs the shaking action with the shaking rod 62 as a fulcrum.

[0081] In one embodiment, a support groove is provided on the support platform 11, and the end of the nodding rod 61 abuts against the support groove. Preferably, the top end of the support groove is a V-shaped groove with an open structure.

[0082] In one embodiment, the nodding rod 61 is fixedly connected to the shaking rod 62 .

[0083] In one embodiment, the cross-axis mounting groove 22 includes a nodding rod accommodating groove and a shaking rod accommodating groove. The shaking rod accommodating groove and the nodding rod accommodating groove are perpendicular to and connected to each other. The shaking rod accommodating groove is located above the middle part of the nodding rod accommodating groove.

[0084] In one embodiment, referring to Figure 2 and Figure 3 The zoom driving mechanism includes a lens coil 51 arranged on the side wall of the base 10 and a lens magnet 52 arranged on the side wall of the lens carrier 30. The lens coil 51 and the lens magnet 52 are arranged opposite to each other, and the lens carrier 30 is driven to move along the optical axis direction of the zoom lens through the cooperation of the two.

[0085] In one embodiment, referring to Figures 2 to 5 One or more ball grooves 81 are respectively arranged on both sides of the bottom end of the base 10 and one side of the bottom end of the lens carrier 30. Balls 8 are installed in the ball grooves 81. A ball support plane 31 is arranged on the other side of the bottom end of the lens carrier 30. The upper and lower ends of the ball 8 on one side are respectively in contact with the upper and lower ball grooves 81 on the same side, and the top end of the ball 8 on the other side is in contact with the ball support plane 31 and the bottom end is in contact with the lower ball groove 81 on the same side. The ball 8 provides rolling support for the lens carrier 30.

[0086] The number of the ball grooves 81 on both sides of the bottom end of the base 10 and one side of the bottom end of the lens carrier 30 and the number of the balls 8 in the ball grooves 81 are not limited and can be determined according to actual conditions.

[0087] In one embodiment, the ball groove 81 is a V-shaped groove, an arc groove or a plane groove.

[0088] In one embodiment, the lens driving device further comprises a housing 90, which is detachably connected to the base 10, and a receiving cavity is provided between the housing 90 and the prism carrier 20, the lens carrier 30, the prism driving mechanism and the zoom driving mechanism are arranged in the receiving cavity. A light inlet may be provided on the housing 90, and the light inlet is arranged relative to the prism on the prism carrier 20.

[0089] Embodiment 2:

[0090] Reference Figures 8 to 12 This embodiment provides a lens driving device. Compared with Embodiment 1, the lens driving device has a different preload structure. The remaining structures of this embodiment are the same as those of Embodiment 1 and will not be described in detail herein.

[0091] The preload structure of this embodiment includes an elastic reset member and an adsorption assembly. The elastic reset member is a first spring 73. The first spring 73 is a sheet-like structure. The first spring 73 is fixed on the base 10. The four end corners of the spring are fixed to the bottom end of the prism carrier 20 via spring wires 731.

[0092] The first adsorption member in the adsorption assembly is a first reed 73, and the second adsorption member in the adsorption assembly is an adsorption magnet 74, which is disposed at the bottom of the prism carrier 20. The adsorption magnet 74 and the first reed 73 are disposed opposite to each other, and the two generate an adsorption force, so that a pre-tightening force is generated between the prism carrier 20 and the base 10. In addition, the structure of the first reed 73 has a certain pre-tightening effect while playing a resetting effect.

[0093] In one embodiment, referring to Fig.10 The ends of the spring wire 731 connected to the four end corners of the first spring piece 73 may be provided with a prism carrier connecting portion 732, and four first mounting protrusions 23 may be provided at the bottom end of the prism carrier 20, and each prism carrier connecting portion is connected to each first mounting protrusion 23 to realize the connection between the first spring piece 73 and the bottom end of the prism carrier 20.

[0094] Embodiment 3:

[0095] Reference Figures 13 to 23 This embodiment provides a lens driving device. Compared with Embodiment 1, the lens driving device has a different preload structure, a different prism driving mechanism, a different position of the support groove on the prism carrier, and a different support platform on the base. The remaining structure of this embodiment is the same as that of Embodiment 1 and will not be described in detail.

[0096] The preload structure of this embodiment includes an elastic reset member and an adsorption assembly. The elastic reset member is a second spring 75. The second spring 75 is a frame-type structure. The middle part of the side of the second spring 75 is fixed on the base 10, and the four end corners of the spring are fixed on the bottom end of the prism carrier 20.

[0097] In one embodiment, referring to Figures 17 to 22 The second spring plate 75 has a plurality of support plates, and the support plates are connected to form a frame structure through spring wires 751. The support plates located in the middle of the side are fixed on the base 10 as base support plates 752, and the support plates located at the four end corners are fixed on the bottom end of the prism carrier 20 as prism carrier support plates 753.

[0098] Of course, the base support piece 752 may also be located at other positions other than the middle of the side, and the prism carrier support piece 753 may also be located at other positions other than the four end corners. That is, a part of the plurality of support pieces is fixed on the base 10 as the base support piece 752, and another part of the plurality of support pieces is fixed on the bottom end of the prism carrier 20 as the prism carrier support piece 753.

[0099] Reference Fig.18 The base 10 is provided with a spring preload avoidance groove 12 corresponding to the spring wire 751 and the prism carrier support piece 753, and the spring wire 751 and the prism carrier support piece 753 can be located in the spring preload avoidance groove 12. The spring preload avoidance groove 12 can allow the second spring 75 to have a certain preload avoidance space, thereby increasing the pull-back elastic performance of the second spring 75.

[0100] In one embodiment, referring to Fig.21 Four second mounting protrusions 26 may be provided at the bottom end of the prism carrier 20 , and each prism carrier support piece 753 is connected to each second mounting protrusion 26 to realize the connection between the second spring piece 75 and the bottom end of the prism carrier 20 .

[0101] The prism driving mechanism of this embodiment includes a first nodding coil 43 arranged at the inner bottom of the base 10, a first shaking coil 44 arranged on the side wall of the base 10, a first nodding magnet 45 arranged at the bottom end of the prism carrier 20, and a first shaking magnet 46 arranged on the side wall of the prism carrier 20. The first nodding coil 43 and the first nodding magnet 45 are arranged opposite to each other, and the two cooperate to realize the nodding action of the prism carrier 20. The first shaking coil 44 and the first shaking magnet 46 are arranged opposite to each other, and the two cooperate to realize the shaking action of the prism carrier 20.

[0102] The first adsorption component in the adsorption assembly adopts a first nodding magnet 45 disposed at the bottom of the prism carrier 20, and the second adsorption component in the adsorption assembly adopts an adsorption iron sheet 76, which is disposed at the bottom of the base 10 and below the first nodding coil 43. The first nodding magnet 45 and the adsorption iron sheet 76 are disposed opposite to each other, and an adsorption force is generated between the two, so that a pre-tightening force is generated between the prism carrier 20 and the base 10. In addition, the structure of the second spring sheet 75 has a certain pre-tightening effect while playing a resetting effect.

[0103] In one embodiment, since the second reed 75 is a frame-shaped structure, the first nodding coil 43 is disposed below the inner side of the second reed 75 .

[0104] In one embodiment, since the first shaking magnet 46 is disposed on the side wall of the prism carrier 20, it affects the design position of the support groove for accommodating the support platform. Therefore, in this embodiment, unlike the first embodiment, the support platform that should be disposed on the side wall of the base 10 is disposed near the middle, and accordingly, a support groove is disposed near the middle of the side wall of the prism carrier 20. Specifically:

[0105] Reference Figures 19 to 21 A shaky magnet installation groove 24 is provided on one side of the prism carrier 20, and the first shaky magnet 46 is installed in the shaky magnet installation groove 24. A support groove 21 is provided near the middle of one side of the prism carrier 20 and on the opposite side. At this time, the shaky magnet installation groove 24 is located outside the support groove 21 on one side. Such a design will not affect the installation operation of the first shaky magnet 46. A cross shaft installation groove 22 is provided at the bottom end of the prism carrier 20, and the cross shaft 60 is installed in the cross shaft installation groove 22.

[0106] The cross axis 60 includes a nodding rod 61 extending along the second direction and a shaking rod 62 extending along the first direction. Both ends of the nodding rod 61 are arranged on support platforms 11 in the base 10. Each support platform 11 extends into the corresponding support groove 21 and supports the nodding rod 61.

[0107] In one embodiment, referring to Fig.14 , Fig.21 and Fig. 22 A magnetic attraction portion 754 bent upward is provided on one side of the second spring sheet 75. The magnetic attraction portion 754 extends into the support groove 21 on one side and is located near the first shaking head magnet 46. Fig. 20 and Fig.21 The support groove 21 on one side is connected to the shaking head magnet installation groove 24 through a magnetic avoidance groove 25.

[0108] The design of the magnetic avoidance groove 25 allows a certain adsorption force to be generated between the first shaking head magnet 46 and the magnetic attraction portion 754 after the first shaking head magnet 46 is installed, thereby improving the installation stability of the first shaking head magnet 46.

[0109] In one embodiment, referring to Fig.14 , Figures 19 to 22 A bending portion 755 is disposed on one side of the second spring sheet 75. The bending portion 755 is located outside the magnetic attraction portion 754. The outer sidewall of the bending portion 755 contacts the inner sidewall of the base 10. The bending portion 755 is located at the bottom end of the first shaking head magnet 46. The bending portion 755 can support the first shaking head magnet 46.

[0110] Embodiment 4:

[0111] Reference Figures 24 to 31 This embodiment provides a lens driving device. Compared with Embodiment 3, the lens driving device has a different prism driving mechanism and a different adsorption component in the pre-tightening force structure. The remaining structure of this embodiment is the same as that of Embodiment 3 and will not be described in detail.

[0112] The prism driving mechanism of this embodiment includes a second nodding coil 47 arranged on the inner rear side of the base 10, a second shaking coil 48 arranged on the side wall of the base 10, a second nodding magnet 49 arranged on the rear side of the prism carrier 20, and a second shaking magnet 40 arranged on the side wall of the prism carrier 20. The second nodding coil 47 and the second nodding magnet 49 are arranged opposite to each other, and the two cooperate to realize the nodding action of the prism carrier 20. The second shaking coil 48 and the second shaking magnet 40 are arranged opposite to each other, and the two cooperate to realize the shaking action of the prism carrier 20.

[0113] The first adsorption member in the adsorption assembly of this embodiment is an adsorption magnet 771 disposed at the bottom of the prism carrier 20, and the second adsorption member in the adsorption assembly is an adsorption iron sheet 772 disposed at the bottom of the base. The adsorption magnet 771 and the adsorption iron sheet 772 are disposed opposite to each other, and an adsorption force is generated between the two, so that a pre-tightening force is generated between the prism carrier 20 and the base 10. In addition, the structure of the second spring sheet 75 has a certain pre-tightening effect while playing a reset effect.

[0114] In one embodiment, a second adsorption magnet installation groove 28 is disposed at the bottom end of the prism carrier 20 . The second adsorption magnet installation groove 28 is located below the cross axis 60 , and the adsorption magnet 771 is installed in the second adsorption magnet installation groove 28 .

[0115] Those skilled in the art will understand that the adsorption component of the present invention, in addition to the above-mentioned implementations 1 to 4 of the adsorption magnet and the adsorption iron sheet, the adsorption magnet and the reed sheet, and the nodding magnet and the adsorption iron sheet, in other embodiments, the adsorption magnet and the adsorption iron sheet may be interchanged, or the adsorption force may be generated by the interaction of two adsorption magnets.

[0116] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A lens driving device, comprising a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism, wherein the lens carrier and the prism carrier are arranged in the base along a first direction, and a cross axis is arranged between the prism carrier and the base; The zoom driving mechanism drives the lens carrier to move along a first direction, and the prism driving mechanism drives the prism carrier to move around the first direction and a second direction perpendicular to the first direction with the cross axis as a fulcrum; It is characterized in that A pre-tightening force structure is also provided between the prism carrier and the base, and the pre-tightening force structure comprises: An elastic reset member, respectively connecting the bottom end of the prism carrier and the inner bottom end of the base; An adsorption component, comprising a first adsorption member and a second adsorption member arranged opposite to each other, wherein one of the first adsorption member and the second adsorption member is arranged at the bottom end of the prism carrier and the other is arranged at the bottom end of the base, and the first adsorption member and the second adsorption member are any one of an adsorption magnet and an adsorption iron sheet; The prism driving mechanism includes a nodding coil arranged at the bottom or rear side of the base, a shaking coil arranged on the side wall of the base, a nodding magnet arranged at the bottom end or rear side of the prism carrier, and a shaking magnet arranged on the side wall of the prism carrier, the nodding coil is arranged opposite to the nodding magnet, and the shaking coil is arranged opposite to the shaking magnet; The prism carrier is provided with a supporting groove near the middle of one side and the opposite side; The elastic return member is a leaf spring, one side of which is provided with an upwardly bent magnetic attraction portion, the magnetic attraction portion extends into the support groove on one side and is located on a side close to the shaking head magnet; The spring sheet has a plurality of supporting sheets, each of which is connected to form a frame structure by a spring wire, a part of the supporting sheets is fixed on the base as a base supporting sheet, and another part of the supporting sheets is fixed on the bottom end of the prism carrier as a prism carrier supporting sheet; A shaking head magnet installation groove is provided on one side of the prism carrier, and the shaking head magnet is installed in the shaking head magnet installation groove. The supporting groove on one side is connected to the shaking head magnet installation groove through a magnetic attraction avoidance groove.

2. The lens driving device according to claim 1, wherein: The reed is a frame-shaped structure, the middle part of the side of the reed is fixed on the base, and the four end corners of the reed are fixed on the bottom end of the prism carrier.

3. The lens driving device according to claim 1, wherein: The base is provided with a spring preload avoidance groove corresponding to the spring wire and the prism carrier support piece, and the spring wire and the prism carrier support piece can be located in the spring preload avoidance groove.

4. The lens driving device according to claim 1, wherein: When the nodding magnet is arranged at the bottom end of the prism carrier, the nodding magnet at the bottom end of the prism carrier serves as one of the first adsorption component and the second adsorption component and is arranged opposite to the other one arranged below the nodding coil.

5. The lens driving device according to claim 1, wherein: A support groove is provided near the middle of one side of the prism carrier and on the opposite side, and a cross shaft installation groove is provided at the bottom end of the prism carrier, and the cross shaft is installed in the cross shaft installation groove; The cross axis includes a nodding rod extending along the second direction and a shaking rod extending along the first direction. Both ends of the nodding rod are arranged on support platforms inside the base. One of the support platforms extends into a corresponding support groove and supports the nodding rod.

6. The lens driving device according to claim 1, wherein: A bending portion bending upward is provided on one side of the spring sheet, the bending portion is located outside the magnetic attraction portion, the outer side wall of the bending portion contacts the inner side wall of the base, and the bending portion is located at the bottom end of the shaking head magnet.

7. The lens driving device according to any one of claims 1 to 6, characterized in that: The zoom driving mechanism comprises a lens coil arranged on the side wall of the base and a lens magnet arranged on the side wall of the lens carrier, and the lens coil and the lens magnet are arranged opposite to each other.

8. The lens driving device according to claim 7, wherein: One or more ball grooves are respectively arranged on both sides of the bottom end of the base and on one side of the bottom end of the lens carrier, and balls are installed in the ball grooves. A ball supporting plane is arranged on the other side of the bottom end of the lens carrier, and the upper and lower ends of the balls on one side are respectively in contact with the upper and lower ball grooves on the same side, and the top end of the balls on the other side are in contact with the ball supporting plane and the bottom end is in contact with the ball groove at the bottom of the same side.

9. The lens driving device according to claim 8, wherein: The ball groove is one of a V-shaped groove, an arc groove or a plane groove.

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