Lens driving device

Abstract

The invention belongs to the technical field of optical imaging equipment, and particularly relates to a lens driving device, which comprises a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism, and is characterized in that a cross shaft is arranged between the prism carrier and the base; the cross shaft comprises a nodding shaft extending in the second direction and a head shaking shaft extending in the first direction. The bottom end of the prism carrier is provided with a nodding shaft mounting groove and a head shaking shaft mounting groove, a nodding shaft is mounted in the nodding shaft mounting groove, and a head shaking shaft is mounted in the head shaking shaft mounting groove; the prism driving mechanism comprises a head shaking magnet arranged on the side wall of the prism carrier, and a head shaking shaft installation groove is of an asymmetric V-shaped groove structure. The oscillating magnet is arranged on the side wall of the prism carrier, and the oscillating shaft mounting groove in the prism carrier adopts an asymmetric V-shaped structure, so that the oscillating shaft can increase the magnetic attraction resistance to the oscillating magnet arranged on one side of the prism carrier.

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 movements 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; 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; The cross axis includes a nodding axis extending along the second direction and a shaking axis extending along the first direction; The bottom end of the prism carrier is provided with a nodding axis installation groove and a shaking axis installation groove, the nodding axis is installed in the nodding axis installation groove, and the shaking axis is installed in the shaking axis installation groove; The prism driving mechanism comprises an oscillating magnet arranged on the side wall of the prism carrier, and the oscillating shaft mounting groove adopts an asymmetric V-shaped groove structure.

[0007] Optionally, the intersection line of two sides of the oscillating shaft installation groove is closer to the oscillating magnet relative to the axis of the oscillating shaft.

[0008] Optionally, the nodding shaft mounting groove adopts an asymmetric V-groove structure.

[0009] Optionally, support grooves are provided on both sides of the prism carrier, and both ends of the nodding axis are provided on support platforms on both sides of the base, and one of the support platforms extends into a corresponding one of the support grooves and supports the nodding axis; The top surface of the support platform is provided with a support installation groove, the end of the nodding shaft is arranged in the support installation groove, and the support installation groove adopts an asymmetric V-shaped groove structure.

[0010] Optionally, a supporting groove is provided on one side of the prism carrier near the middle position and on the opposite side; Two support platforms are arranged in the base, and the two ends of the nodding axis are arranged on the two support platforms respectively. Among the two support platforms, one is located at the side as the first support platform, and the other is arranged near the middle as the second support platform to extend into the two support grooves correspondingly, and the shaking head magnet is located on the outside of the second support platform.

[0011] Optionally, a reed slot is provided on the second supporting platform, and the reed slot is plugged with a first reed, and the first reed has a first reed plug-in portion and a first reed abutment portion that are connected to each other, the first reed plug-in portion is plugged with the reed slot, and the first reed abutment portion abuts with one end of the nodding axis on its inner side.

[0012] Optionally, the first spring abutment portion has a lower inclined piece and an upper inclined piece, the lower inclined piece is inclined in a direction close to the nodding axis at the bottom and away from the nodding axis at the top, the bottom of the lower inclined piece is connected to the first spring plug-in portion, the upper inclined piece is inclined in a direction away from the nodding axis at the bottom and close to the nodding axis at the top, and the bottom of the upper inclined piece is connected to the top of the lower inclined piece directly or via a connecting piece.

[0013] Optionally, the first reed abutting portion is provided with an abutting portion limiting protrusion, and the abutting portion limiting protrusion is located at the inner side of the first reed plug-in portion and can abut against the first reed plug-in portion.

[0014] Optionally, the first spring piece plug-in portion has a limiting groove, the bottom of the lower inclined piece is connected to the limiting groove, the top of the upper inclined piece passes through the limiting groove, and the abutment portion limiting protrusions are provided on both sides of the top of the upper inclined piece.

[0015] Optionally, a pre-tightening force structure is further provided between the prism carrier and the base, and the pre-tightening force structure includes at least one of a second spring sheet or an adsorption component; The adsorption component comprises a first adsorption component and a second adsorption component which are arranged opposite 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.

[0016] Optionally, a second reed is further arranged between the prism carrier and the base, and a second reed limiting portion is arranged on one side of the second reed. The second reed limiting portion extends to a position between the supporting groove where the second supporting platform is located and the shaking head magnet, and the second reed limiting portion is located on the outer side of one end of the nodding axis and abuts against the nodding axis.

[0017] Optionally, a second reed support portion is further provided on one side of the second reed, the second reed support portion is located outside the second reed limiting portion, and the outside of the second reed support portion abuts against the inner wall of the base.

[0018] Optionally, the second spring limiting portion and the second spring supporting portion are both vertical sheet structures.

[0019] Optionally, the lower portion of the second reed limiting portion is bent toward one side of the second reed supporting portion, and the bottom end of the second reed limiting portion is connected to the second reed; The lower portion of the second spring support portion is bent toward one side of the second spring limiting portion, and the bottom end of the second spring support portion is connected to the second spring.

[0020] Optionally, the second spring limiting portion includes a connecting portion connected to the second spring and an abutting portion abutting against the nodding shaft, and a bottom end of the abutting portion is connected to the connecting portion.

[0021] Optionally, the abutting portion is a T-shaped structure, the bottom end of the vertical section of the abutting portion is connected to the connecting portion, and the horizontal section of the abutting portion abuts against the nodding axis.

[0022] Optionally, the connecting portion includes two outer connecting portions of a U-shaped structure and an inner connecting portion, the inner connecting portion is located in the middle groove of the outer connecting portion, and the top ends of the inner connecting portion are connected to the top ends of the middle groove of the outer connecting portion; The bottom end of the abutting portion extends into the middle groove of the inner connecting portion and is connected to the bottom end of the middle groove of the inner connecting portion.

[0023] Optionally, one or more limiting portion through grooves are formed on the second spring limiting portion.

[0024] Optionally, the second reed is a rectangular frame-like structure, and the second reed limiting portion is arranged on a short side of the second reed.

[0025] Optionally, the second spring sheet includes a plurality of prism carrier connection parts for connecting to the bottom surface of the prism carrier, and a plurality of base connection parts connected to the inner bottom surface of the base, the prism carrier connection parts and the base connection parts are spaced apart and connected by elastic spring wires, and the plurality of prism carrier connection parts, the plurality of base connection parts and the plurality of elastic spring wires form a second spring sheet with a rectangular frame structure.

[0026] Optionally, the elastic spring wire is a quasi-I-shaped bending structure or a plurality of quasi-U-shaped bending structures connected in series.

[0027] Optionally, when the elastic spring wire is a plurality of U-shaped bending structures connected in series, the lengths of the U-shaped bending structures are the same or different.

[0028] Optionally, the oscillating shaft adopts a magnetic oscillating shaft; A positioning magnet installation groove is arranged at the rear end of the prism carrier, a positioning magnet is installed in the positioning magnet installation groove, and the positioning magnet is arranged opposite to one end of the shaking shaft and is attracted to each other.

[0029] Optionally, the inner wall of the nodding shaft mounting groove is provided with one or more convex point structures.

[0030] Optionally, the prism driving mechanism further comprises a nodding coil arranged at the bottom of the base, a shaking head coil arranged on the side wall of the base and a nodding magnet arranged at the bottom end of the prism carrier, the nodding coil and the nodding magnet are arranged opposite to each other, and the shaking head coil and the shaking head magnet are arranged opposite to each other; The nodding coil and the shaking magnet are powered by a circuit board arranged outside the base.

[0031] Optionally, the circuit board is an FPC board.

[0032] Optionally, the base is provided with a light outlet that is connected inside and outside, the light outlet is located at the front end of the lens carrier, a plug-in board slot is provided on the inner side of the light outlet, the plug-in board slot is plugged into the plug-in board, the plug-in board is provided with an avoidance hole, the avoidance holes on different plug-in boards have different sizes, and the size of the light outlet of the base is adjusted by replacing the plug-in board.

[0033] Beneficial effects: The present invention has at least one or more of the following advantages: 1. Since a shaking head magnet is arranged on the side wall of the prism carrier of the present invention, the shaking head shaft installation groove on the prism carrier of the present invention adopts an asymmetric V-shaped structure, so that the shaking head shaft can increase the magnetic attraction resistance to the shaking head magnet arranged on one side of the prism carrier.

[0034] 2. Since the present invention sets a shaking head magnet on the side wall of one side of the prism carrier, it affects the design position of the support groove for accommodating the second support platform. Therefore, the present invention sets the second support platform that should be set on the side wall of one side of the base close to the middle, and accordingly, sets a support groove for accommodating the second support platform near the middle of the side wall of the prism carrier, the cross axis at the bottom end of the prism carrier is mounted on two support platforms, and the shaking head magnet installation groove for installing the shaking head magnet is set on the outside of the support groove for accommodating the second support platform. This design will not affect the installation operation of the shaking head magnet.

[0035] 3. The present invention provides a reed slot on the second support platform, in which the first reed can be fixedly inserted. After placing one end of the nodding shaft on the second support platform, the first reed inserting portion of the first reed is inserted into the reed slot, so that the first reed abutting portion of the first reed abuts against one end of the nodding shaft, thereby limiting the nodding shaft.

[0036] The first reed abutting portion is provided with an abutting portion limiting protrusion, and the first reed abutting portion is limited by the first reed inserting portions on both sides, so as to facilitate the pre-pressing and shape setting of the first reed.

[0037] 4. In the present invention, the second spring limiting portion abuts against one end of the nodding shaft to limit the position of the nodding shaft through elastic thrust, thereby avoiding relative sliding between the nodding shaft and the prism carrier.

[0038] The present invention increases the supporting effect of the second spring limiting portion by abutting the second spring supporting portion against the inner wall of the base, so that the second spring limiting portion has better elastic potential energy and structural strength.

[0039] 5. In order to limit the position of the oscillating shaft, the present invention uses a positioning magnet to adsorb one end of the magnetic oscillating shaft to avoid relative sliding between the oscillating shaft and the prism carrier.

[0040] In order to limit the position of the shaking head axis, the present invention arranges a convex structure on the inner wall of the nodding axis installation groove. The convex structure can reduce the gap between the inner wall of the nodding axis installation groove and the nodding axis, making it difficult for the nodding axis to move in the nodding axis installation groove, thereby ensuring that the shaking head axis will not slide relative to the prism carrier, and also avoiding relative sliding between the shaking head axis and the prism carrier.

[0041] 6. The present invention provides a plug-in plate at the front end of the lens carrier to be plugged into the base, and plug-ins with different apertures can be replaced as needed. The size of the light outlet of the base can be adjusted by replacing the plug-in plate to change the angle range of the emitted light. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 for Figure 1 AA section view; Figure 3 for Figure 1 BB cross-sectional view; Figure 4 for Figure 1 Exploded diagram of Figure 5 for Figure 4 Further exploded diagram of; Figure 6 for Figure 5 Another angle diagram of the prism carrier and the lens carrier; Figure 7 A schematic diagram of the structure of a prism carrier in Example 1 of the present invention; Figure 8 for Figure 7 Schematic diagram from another angle; Fig. 9 for Figure 8 Schematic diagram of some structures in ; Fig.10 for Fig. 9 Schematic diagram of some structures in ; Fig.11 is another structural schematic diagram of the prism carrier in Example 1 of the present invention; Fig.12 for Fig.11 Partial structural diagram of Fig.13 A schematic diagram of the structure of the second reed in Embodiment 1 of the present invention; Fig.14 is another structural schematic diagram of the second reed in Embodiment 1 of the present invention; Fig.15 for Figure 5 Another angle diagram of the middle base; Fig.16 is a positional relationship diagram between the base and the second reed in Example 1 of the present invention; Fig.17 A diagram showing the positional relationship between the base, the cross shaft and the second spring in Example 1 of the present invention; Fig.18 This is an exploded view of the structure of Embodiment 2 of the present invention; Fig.19 for Fig.18 Further exploded diagram of; Fig. 20 A schematic diagram of the structure of a prism carrier in Example 2 of the present invention; Fig.21 for Fig. 20 Schematic diagram of some structures; Fig. 22 for Fig.21 Schematic diagram from another angle; Fig.23 A schematic diagram of the structure of a base in Embodiment 2 of the present invention; Fig.24 is a position relationship diagram of the first spring sheet and the second support platform in Example 2 of the present invention; Fig.25 for Fig.24 A schematic diagram of the structure of the second support platform; Fig.26 for Fig.24 A schematic diagram of the structure of the first reed; Fig. 27 for Fig.26 Schematic diagram from another angle. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] Embodiment 1: Reference Figures 1 to 17 An embodiment of the present invention 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.

[0049] 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.

[0050] A cross shaft 60 is provided between the prism carrier 20 and the base 10 . The prism carrier 20 uses the cross shaft 60 as a fulcrum to perform nodding and shaking movements, making the movement of the prism carrier 20 easier and reducing the movement resistance of the prism carrier 20 .

[0051] 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 the head, 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.

[0052] The cross axis 60 includes a nodding axis 61 extending along the second direction and a shaking axis 62 extending along the first direction. A second reed 70 is also provided between the prism carrier 20 and the base 10. Fig.13 and Fig.14 A second spring limiting portion 71 is provided on one side of the second spring 70 . The second spring limiting portion 71 is located outside one end of the nodding shaft 61 and abuts against the nodding shaft 61 .

[0053] The present invention provides a second spring 70 between the bottom end of the prism carrier 20 and the base 10 to increase the stability of the connection structure between the prism carrier 20 and the base 10 and improve the reset effect. The second spring limiter 71 abuts against one end of the nodding shaft 61 to limit the position of the nodding shaft 61 through elastic thrust, thereby preventing the nodding shaft 61 and the prism carrier 20 from sliding relative to each other.

[0054] In one embodiment, referring to Figure 3 , Fig.13 and Fig.14 A second reed support portion 72 is further provided on one side of the second reed 70 . The second reed support portion 72 is located outside the second reed limiting portion 71 . The outside of the second reed support portion 72 abuts against the inner wall of the base 10 .

[0055] In the present invention, the second spring support portion 72 abuts against the inner wall of the base 10, thereby increasing the supporting effect on the second spring limit portion 71, so that the second spring limit portion 71 has better elastic potential energy and structural strength.

[0056] In one embodiment, referring to Fig.13 and Fig.14 The second spring limiting portion 71 and the second spring supporting portion 72 are both vertical sheet structures.

[0057] In one embodiment, the lower portion of the second reed stopper 71 is bent toward the second reed support portion 72, and the bottom end of the second reed stopper 71 is connected to the second reed 70. The second reed stopper 71 and the second reed 70 are preferably connected in one piece.

[0058] The lower part of the second spring support part 72 is bent toward the second spring stopper 71, and the bottom end of the second spring support part 72 is connected to the second spring 70. The second spring support part 72 and the second spring 70 are preferably connected as one piece.

[0059] In one embodiment, referring to Fig.13 The second spring limiting portion 71 includes a connecting portion connected to the second spring and an abutting portion abutting against the nodding shaft, and the bottom end of the abutting portion is connected to the connecting portion.

[0060] In one embodiment, the abutting portion is a T-shaped structure, the bottom end of the vertical section of the abutting portion is connected to the connecting portion, and the horizontal section of the abutting portion abuts against the nodding axis.

[0061] In one embodiment, the connection portion includes two U-shaped outer connection portions and an inner connection portion, the inner connection portion is located in the middle groove of the outer connection portion, and the top ends of the inner connection portion are connected to the top ends of the middle groove of the outer connection portion. The bottom end of the abutment portion extends into the middle groove of the inner connection portion and is connected to the bottom end of the middle groove of the inner connection portion.

[0062] In one embodiment, referring to Fig.14 The second spring limiting portion is provided with one or more limiting portion through grooves.

[0063] In one embodiment, referring to Fig.13 and Fig.14 The second reed 70 is a rectangular frame-like structure, and the second reed limiting portion 71 is arranged on the short side of the second reed 70 .

[0064] When the second reed support portion 72 is present, the second reed support portion 72 is also provided on the short side of the second reed 70 .

[0065] In one embodiment, the second spring sheet 70 includes a plurality of prism carrier connection parts 73 for connecting to the bottom surface of the prism carrier 20, and a plurality of base connection parts 74 connected to the inner bottom surface of the base 10. The prism carrier connection parts 73 and the base connection parts 74 are arranged at intervals and connected to each other by an elastic spring wire 75. The plurality of prism carrier connection parts 73, the plurality of base connection parts 74 and the plurality of elastic spring wires 75 form a second spring sheet 70 with a rectangular frame structure.

[0066] Specifically, two base connection parts 74 in the form of long rectangular sheets form the short side of the rectangular frame-like structure. The long side of the rectangular frame-like structure is: two prism carrier connection parts 73 in the form of circular sheets are respectively connected to a base connection part 74 in the form of short rectangular sheets through two elastic spring wires 75, and two prism carrier connection parts 73 in the form of circular sheets are respectively connected to the base connection parts 74 in the form of long rectangular sheets adjacent to each other through another elastic spring wire 75.

[0067] A connecting hole may be provided on the base connecting portion 74 of the short rectangular sheet structure, and a connecting column may be provided on the base, and the connecting hole is plugged into the connecting column.

[0068] In one embodiment, referring to Fig.13 The elastic spring wire 75 is a quasi-X-shaped bending structure.

[0069] In one embodiment, referring to Fig.14 The elastic spring wire 75 is a plurality of U-shaped bending structures connected in series.

[0070] When the elastic spring wire 75 is a plurality of U-shaped bending structures connected in series, the lengths of the various U-shaped bending structures are the same or different.

[0071] In one embodiment, referring to Fig. 9 and Fig.10The bottom end of the prism carrier 20 is provided with a nodding shaft installation groove 21 and a shaking shaft installation groove 22, the nodding shaft installation groove 21 and the shaking shaft installation groove 22 are perpendicular to each other and connected, and the shaking shaft installation groove 22 is located below the middle of the nodding shaft installation groove 21. A nodding shaft 61 is installed in the nodding shaft installation groove 21, and a shaking shaft 62 is installed in the shaking shaft installation groove 22, and the shaking shaft 62 adopts a magnetic shaking shaft 62.

[0072] Reference Fig. 9 and Fig.10 A positioning magnet installation groove 23 is provided at the rear end of the prism carrier 20, and a positioning magnet 63 is installed in the positioning magnet installation groove 23. The positioning magnet 63 is arranged opposite to one end of the shaking shaft 62 and is attracted to each other.

[0073] In order to limit the position of the oscillating shaft 62 , the present invention uses a positioning magnet 63 to adsorb one end of the magnetic oscillating shaft 62 to avoid relative sliding between the oscillating shaft 62 and the prism carrier 20 .

[0074] In one embodiment, referring to Fig.11 and Fig.12 The bottom end of the prism carrier 20 is provided with a nodding shaft installation groove 21 and a shaking shaft installation groove 22, the nodding shaft installation groove 21 and the shaking shaft installation groove 22 are perpendicular to each other and connected, and the shaking shaft installation groove 22 is located below the middle of the nodding shaft installation groove 21. A nodding shaft 61 is installed in the nodding shaft installation groove 21, and a shaking shaft 62 is installed in the shaking shaft installation groove 22, and the shaking shaft 62 adopts a magnetic shaking shaft 62.

[0075] One or more convex point structures 24 are arranged on the inner wall of the nodding shaft installation groove 21 .

[0076] In order to limit the position of the shaking head shaft 62, the present invention arranges a convex structure 24 on the inner wall of the nodding shaft mounting groove 21. The convex structure 24 can reduce the gap between the inner wall of the nodding shaft mounting groove 21 and the nodding shaft 61, making it difficult for the nodding shaft 61 to move in the nodding shaft mounting groove 21, thereby ensuring that the shaking head shaft 62 will not slide relative to the prism carrier 20, and also avoiding relative sliding between the shaking head shaft 62 and the prism carrier 20.

[0077] In one embodiment, referring to Figures 9 to 12 The prism carrier 20 is provided with supporting grooves 25 on both sides, and a cross shaft installation groove is provided at the bottom of the prism carrier 20, in which the cross shaft is installed. The cross shaft installation groove has a nodding shaft installation groove 21 and a shaking shaft installation groove 22, and the nodding shaft installation groove 21 and the shaking shaft installation groove 22 are perpendicular to each other and connected, and the shaking shaft installation groove 22 is located below the middle of the nodding shaft installation groove 21. A nodding shaft 61 is installed in the nodding shaft installation groove 21, and a shaking shaft 62 is installed in the shaking shaft installation groove 22.

[0078] Reference Fig.15 Both ends of the nodding shaft 61 are arranged on the support platforms 11 on both sides of the base 10 . After the prism carrier 20 is installed with the base 10 , one support platform 11 extends into a corresponding support groove 25 and supports the nodding shaft 61 .

[0079] In one embodiment, referring to Figures 2 to 7 The prism driving mechanism includes a nodding coil 41 disposed at the bottom of the base 10, a shaking coil 42 disposed on the side wall of the base 10, a nodding magnet 43 disposed at the bottom of the prism carrier 20, and a shaking magnet 44 disposed on the side wall of the prism carrier 20. The nodding coil 41 and the nodding magnet 43 are disposed opposite to each other, and the two cooperate to realize the nodding action of the prism carrier 20. The shaking coil 42 and the shaking magnet 44 are disposed opposite to each other, and the two cooperate to realize the shaking action of the prism carrier 20.

[0080] The nodding coil 41 and the shaking magnet 44 are powered by a circuit board 12 disposed outside the base 10 .

[0081] Specifically, the nodding coil 41 and the shaking coil 42 can be connected to the circuit board 12. A coil avoidance hole can be provided at the bottom of the base 10 to accommodate the nodding coil 41. Another coil avoidance hole can be provided on the side wall of the base 10 to accommodate the shaking coil 42.

[0082] In one embodiment, the circuit board 12 is a FPC board.

[0083] In one embodiment, referring to Figures 9 to 12 A shaking head magnet mounting groove 26 is provided on one side of the prism carrier 20, and the shaking head magnet 44 is installed in the shaking head magnet mounting groove 26. A supporting groove 25 is provided near the middle position of one side of the prism carrier 20 and on the opposite side.

[0084] Preferably, a nodding magnet mounting groove 27 is provided at the bottom end of the prism carrier 20, and the nodding magnet 43 is installed in the nodding magnet mounting groove 27, and the nodding magnet mounting groove 27 is located below the cross-axis mounting groove.

[0085] Reference Figures 15 to 17 Of the two supporting platforms 11 on the base 10, one is located at the side as a first supporting platform 11a, and the other is arranged near the middle as a second supporting platform 11b. The first supporting platform 11a extends into the supporting groove 25a, and the second supporting platform 11b extends into the supporting groove 25b.

[0086] Reference Figure 8 The second spring limiting portion 71 extends to a position between the supporting groove 25 b and the shaking magnet installation groove 26 .

[0087] When the present invention sets a shaking magnet 44 on one side of the prism carrier 20, it affects the design position of the support groove 25 for accommodating the second support platform 11b. Therefore, the present invention sets the second support platform 11b, which should be set on the side wall of one side of the base, close to the middle. Correspondingly, a support groove 25b is set near the middle of the side wall of the prism carrier 20. The cross shaft 60 at the bottom end of the prism carrier 20 is mounted on two support platforms 11, and the shaking magnet installation groove 26 for installing the shaking magnet 44 is set outside the support groove 25b. Such a design will not affect the installation operation of the shaking magnet 44.

[0088] In one embodiment, referring to Figure 5 and Fig.17 The base 10 is provided with a light outlet 13 which is connected inside and outside. The light outlet 13 is located at the front end of the lens carrier 30. A plug-in board slot is provided inside the light outlet 13. The plug-in board 80 is plugged into the plug-in board slot. An avoidance hole 81 is provided on the plug-in board 80. The avoidance holes 81 on different plug-in boards 80 have different sizes. The size of the light outlet 13 of the base 10 can be adjusted by replacing the plug-in board 80.

[0089] In one embodiment, the zoom drive mechanism includes a zoom coil 45 arranged on the side wall of the base 10 and a zoom magnet 46 arranged on the side wall of the lens carrier 30. The zoom coil 45 and the zoom magnet 46 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.

[0090] The zoom coil 45 is powered by a circuit board 12 disposed outside the base 10 .

[0091] Specifically, the zoom coil 45 may be connected to the circuit board 12. A coil avoidance hole may be provided on the side wall of the base 10 to accommodate the zoom coil 45.

[0092] In one embodiment, one or more ball grooves 91 are respectively provided on both sides of the bottom end of the base 10 and both sides of the bottom end of the lens carrier 30, and balls 9 are installed in the ball grooves 91. The upper and lower ends of the balls 9 on one side are respectively in contact with the upper and lower ball grooves 91 on the same side. The balls 9 provide rolling support for the lens carrier 30.

[0093] The number of the ball grooves 91 on both sides of the bottom end of the base 10 and the bottom end of the lens carrier 30 and the number of the balls 9 in the ball grooves 91 are not limited and can be determined according to actual conditions.

[0094] In one embodiment, the ball groove 91 is a V-shaped groove, an arc groove or a plane groove.

[0095] In one embodiment, the lens driving device further comprises a housing 50, which is detachably connected to the base 10, and a receiving cavity is provided between the housing 50 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 50, and the light inlet is arranged relative to the prism on the prism carrier 20.

[0096] In one embodiment, referring to Figure 4 and Figure 5 A cover plate 31 is detachably provided on the top of the lens carrier 30, and the cover plate 31 is used to fix the lens.

[0097] Embodiment 2:

[0098] Reference Figures 18 to 27 This embodiment provides a lens driving device. Compared with Embodiment 1, the lens driving device has the following differences. The remaining structures are the same as Embodiment 1 and will not be described in detail here.

[0099] The prism driving mechanism includes a shaking magnet 44 disposed on the side wall of the prism carrier, and a shaking magnet mounting groove 26 is disposed on one side of the prism carrier 20. The shaking magnet 44 is mounted in the shaking magnet mounting groove 26. The shaking shaft mounting groove 22A adopts an asymmetric V-shaped groove structure.

[0100] In Example 1 Figure 3 and Fig.12 Compared with the symmetrical V-shaped groove structure of the oscillating shaft installation groove 22 shown in the figure, the oscillating shaft installation groove 22A of this embodiment adopts an asymmetrical V-shaped groove structure.

[0101] In this embodiment, the oscillating shaft installation groove 22A on the prism carrier 20 adopts an asymmetric V-groove structure, so that the oscillating shaft 62 can increase the magnetic attraction resistance to the oscillating magnet 44 set on one side of the prism carrier 20.

[0102] The asymmetric V-shaped groove structure in this embodiment is relative to the symmetric V-shaped groove structure, and the angles of the two sides of the asymmetric V-shaped groove are different or the lengths of the two sides are different.

[0103] In one embodiment, referring to Fig. 22 The intersection line M of the two sides of the oscillating shaft installation groove 22A is closer to the oscillating magnet 44 relative to the axis N of the oscillating shaft 62.

[0104] In one embodiment, the nodding shaft mounting groove 21A adopts an asymmetric V-shaped groove structure.

[0105] In one embodiment, a support installation groove 111 is disposed on the top surface of the support platform 11 , and the end of the nodding shaft is disposed in the support installation groove 111 . The support installation groove 111 adopts an asymmetric V-shaped groove structure.

[0106] In one embodiment, Figure 23 to Figure 27 A reed slot 11b1 is provided on the second support platform 11b, and the reed slot 11b1 is plugged into the first reed 100. The first reed 100 has a first reed plug-in portion 110 and a first reed abutment portion 120 that are connected to each other. The first reed plug-in portion 110 is plugged into the reed slot 11b1, and the first reed abutment portion 120 abuts against one end of the nodding shaft 61 on its inner side.

[0107] In this embodiment, a reed slot 11b1 is provided on the second support platform 11b, into which the first reed 100 can be fixedly inserted. After one end of the nodding shaft 61 is placed on the second support platform 11b, the first reed inserting portion 110 of the first reed 100 is inserted into the reed slot 11b1, so that the first reed abutting portion 120 of the first reed 100 abuts against one end of the nodding shaft 61, thereby limiting the nodding shaft 61.

[0108] In one embodiment, referring to Fig.26 and Fig. 27 The first spring abutment portion 120 has a lower inclined piece 121 and an upper inclined piece 122. The lower inclined piece 121 is inclined in a direction close to the nodding axis at the bottom and away from the nodding axis at the top. The bottom of the lower inclined piece 121 is connected to the first spring plug-in portion 110, and the upper inclined piece 122 is inclined in a direction away from the nodding axis at the bottom and close to the nodding axis at the top. The bottom of the upper inclined piece 122 is connected to the top of the lower inclined piece 121 directly or through a connecting piece 123.

[0109] In one embodiment, referring to Fig. 27 The first reed abutting portion 120 is provided with an abutting portion limiting protrusion 124 . The abutting portion limiting protrusion 124 is located on the inner side of the first reed inserting portion 110 and can abut against the first reed inserting portion 110 .

[0110] The first reed abutting portion 120 is provided with an abutting portion limiting protrusion 124 , and the first reed abutting portion 120 is limited by the first reed inserting portions 110 on both sides, so as to facilitate the pre-pressing and shape setting of the first reed 100 .

[0111] In one embodiment, the first spring plug-in portion 110 has a limiting groove 111, the bottom of the lower inclined piece 121 is connected to the limiting groove 111, the top of the upper inclined piece 122 passes through the limiting groove 111, and the upper inclined piece 122 is provided with abutment limiting protrusions 124 on both sides of the top.

[0112] In one embodiment, a pre-tightening force structure is further provided between the prism carrier 20 and the base, and the pre-tightening force structure includes at least one of a second spring sheet or an adsorption component.

[0113] Among them, the adsorption component has a first adsorption component and a second adsorption component arranged relatively to each other, one of the first adsorption component and the second adsorption component is arranged at the bottom end of the prism carrier 20 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.

[0114] When the pre-tightening force structure has an adsorption component, it is preferred that the first adsorption component in the adsorption component is a nodding magnet 43 disposed at the bottom of the prism carrier 20, and the second adsorption component in the adsorption component is an adsorption iron sheet disposed at the bottom of the base 10 and below the nodding coil 41. The nodding magnet 43 and the adsorption iron sheet 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.

[0115] When the preload structure has a second reed, the second reed is the second reed 70 provided in each embodiment of Embodiment 1.

[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 The cross axis includes a nodding axis extending along the second direction and a shaking axis extending along the first direction; The bottom end of the prism carrier is provided with a nodding axis installation groove and a shaking axis installation groove, the nodding axis is installed in the nodding axis installation groove, and the shaking axis is installed in the shaking axis installation groove; The prism driving mechanism comprises an oscillating magnet arranged on the side wall of the prism carrier, and the oscillating shaft mounting groove adopts an asymmetric V-shaped groove structure.

2. The lens driving device according to claim 1, wherein: The intersection line of the two sides of the oscillating shaft installation groove is closer to the oscillating magnet relative to the axis of the oscillating shaft.

3. The lens driving device according to claim 1, wherein: The nodding shaft installation groove adopts an asymmetric V-groove structure; And / or, support grooves are provided on both sides of the prism carrier, and both ends of the nodding axis are provided on support platforms on both sides of the base, and one of the support platforms extends into a corresponding support groove and supports the nodding axis; a support installation groove is provided on the top surface of the support platform, and the end of the nodding axis is provided in the support installation groove, and the support installation groove adopts an asymmetric V-groove structure.

4. The lens driving device according to claim 1, wherein: The prism carrier is provided with a supporting groove near the middle of one side and the opposite side; Two support platforms are arranged in the base, and the two ends of the nodding axis are arranged on the two support platforms respectively. Among the two support platforms, one is located at the side as the first support platform, and the other is arranged near the middle as the second support platform to extend into the two support grooves correspondingly, and the shaking head magnet is located on the outside of the second support platform.

5. The lens driving device according to claim 4, characterized in that: A reed slot is provided on the second supporting platform, and the reed slot is plugged with a first reed. The first reed has a first reed plug-in portion and a first reed abutment portion that are connected to each other. The first reed plug-in portion is plugged with the reed slot, and the first reed abutment portion abuts against one end of the nodding shaft on its inner side.

6. The lens driving device according to claim 5, characterized in that: The first spring piece abutting portion comprises a lower inclined piece and an upper inclined piece, the lower inclined piece is in an inclined direction close to the nodding axis at the bottom and away from the nodding axis at the top, the bottom of the lower inclined piece is connected to the first spring piece plug-in portion, the upper inclined piece is in an inclined direction away from the nodding axis at the bottom and close to the nodding axis at the top, the bottom of the upper inclined piece is connected to the top of the lower inclined piece directly or via a connecting piece; And / or, the first reed abutting portion is provided with an abutting portion limiting protrusion, and the abutting portion limiting protrusion is located at the inner side of the first reed plug-in portion and can abut against the first reed plug-in portion.

7. The lens driving device according to claim 6, wherein: The first spring piece plug-in portion has a limiting groove, the bottom of the lower inclined piece is connected to the limiting groove, the top of the upper inclined piece passes through the limiting groove, and the abutment portion limiting protrusions are arranged on both sides of the top of the upper inclined piece.

8. The lens driving device according to any one of claims 4 to 7, characterized in that: A pre-tightening force structure is also provided between the prism carrier and the base, and the pre-tightening force structure includes at least one of a second spring sheet or an adsorption component; The adsorption component comprises a first adsorption component and a second adsorption component which are arranged opposite 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.

9. The lens driving device according to claim 8, wherein: A second reed is also arranged between the prism carrier and the base, and a second reed limiting portion is arranged on one side of the second reed. The second reed limiting portion extends to a position between the supporting groove where the second supporting platform is located and the shaking head magnet, and the second reed limiting portion is located on the outer side of one end of the nodding axis and abuts against the nodding axis.

10. The lens driving device according to claim 9, wherein: A second reed support portion is further provided on one side of the second reed, the second reed support portion is located outside the second reed limiting portion, and the outside of the second reed support portion abuts against the inner wall of the base.

11. The lens driving device according to claim 10, wherein: The second spring limiting portion and the second spring supporting portion are both vertical sheet structures; And / or, the lower portion of the second spring limiting portion is bent toward one side of the second spring supporting portion, and the bottom end of the second spring limiting portion is connected to the second spring; And / or, the lower portion of the second spring support portion is bent toward one side of the second spring limiting portion, and the bottom end of the second spring support portion is connected to the second spring; And / or, the second spring limiting portion includes a connecting portion connected to the second spring and an abutting portion abutting against the nodding axis, the bottom end of the abutting portion is connected to the connecting portion, or one or more limiting portion through grooves are dug on the second spring limiting portion.

12. The lens driving device according to claim 9, wherein: The second reed is a rectangular frame-like structure, and the second reed limiting portion is arranged on the short side of the second reed; And / or, the second spring sheet includes a plurality of prism carrier connection parts for connecting to the bottom surface of the prism carrier, a plurality of base connection parts connected to the inner bottom surface of the base, the prism carrier connection parts and the base connection parts are arranged at intervals and connected by elastic spring wires, and the plurality of prism carrier connection parts, the plurality of base connection parts and the plurality of elastic spring wires form a second spring sheet with a rectangular frame structure.

13. The lens driving device according to claim 12, wherein: The elastic spring wire is a quasi-I-shaped bending structure or a plurality of tandem-connected U-shaped bending structures; When the elastic spring wire is a plurality of U-shaped bending structures connected in series, the lengths of the U-shaped bending structures are the same or different.

14. The lens driving device according to any one of claims 1 to 7, characterized in that: The oscillating shaft adopts a magnetic oscillating shaft; The rear end of the prism carrier is provided with a positioning magnet installation groove, in which a positioning magnet is installed, and the positioning magnet is arranged opposite to one end of the shaking shaft and is attracted to each other; Alternatively, the inner wall of the nodding shaft mounting groove is provided with one or more convex point structures.

15. The lens driving device according to any one of claims 1 to 7, characterized in that: The prism driving mechanism further comprises a nodding coil arranged at the bottom of the base, a shaking coil arranged on the side wall of the base and a nodding magnet arranged at the bottom end of the prism carrier, wherein the nodding coil is arranged opposite to the nodding magnet, and the shaking coil is arranged opposite to the shaking magnet; The nodding coil and the shaking magnet are powered by a circuit board arranged outside the base.

16. The lens driving device according to any one of claims 1 to 7, characterized in that: The base is provided with a light outlet that is connected inside and outside, the light outlet is located at the front end of the lens carrier, a plug-in board slot is provided on the inner side of the light outlet, the plug-in board slot is plugged into the plug-in board, and the plug-in board is provided with an avoidance hole. The avoidance holes on different plug-ins have different sizes, and the size of the light outlet of the base can be adjusted by replacing the plug-in board.

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