Lens driving device

Abstract

The utility model belongs to the technical field of optical imaging equipment, and particularly relates to a lens driving device, which comprises a base, a prism carrier and a prism driving mechanism, a cross shaft is arranged between the prism carrier and the base, and the cross shaft comprises a nodding shaft and a head shaking shaft; a limiting magnet is arranged at the rear end of the prism carrier and abuts against one end of the oscillating shaft. And a nodding position sensor is arranged on the base and is opposite to the limiting magnet. According to the utility model, one end of the oscillating shaft can be abutted and limited by the limiting magnet, so that relative sliding action between the oscillating shaft and the prism carrier can be avoided. Meanwhile, during monitoring of the nodding position of the prism carrier, a limiting magnet is used as an induction magnet, and the position monitoring effect of the nodding action of the prism carrier is achieved through cooperation of the limiting magnet and a nodding position sensor.

Description

Technical Field

[0001] This utility model belongs to the field of optical imaging equipment technology, and specifically relates to a lens driving device. Background Technology

[0002] With the development of technology, many electronic devices today (such as smartphones or digital cameras) have the function of taking pictures or recording videos. The use of these electronic devices is becoming more and more common, and they are developing towards convenient and thinner designs to provide users with more choices.

[0003] Lens drive mechanisms are used in lightweight designs because they can significantly reduce the overall thickness and weight of the device. A typical lens drive mechanism consists of two parts: a lens and a prism. The prism is located at the front end, and the imaging chip is located at the rear end of the lens. Light is reflected by the prism, changing its path to the lens, where it is zoomed before reaching the imaging chip.

[0004] Specifically, the prism section can typically nod and shake on the base to change the angle of light. These movements require a prism magnet and a corresponding prism coil. Achieving stable nodding and shaking movements for the prism section is a problem that needs to be solved. Furthermore, in existing technologies, to monitor the movement of the prism section, a position sensor and a correspondingly positioned sensor magnet are generally used to monitor the nodding and shaking positions. Utility Model Content

[0005] The present invention addresses the aforementioned technical problems by providing a lens driving device.

[0006] A lens driving device includes a base, a prism carrier, and a prism driving mechanism. The prism carrier is disposed in the base, and a cross axis is provided between the prism carrier and the base. The prism driving mechanism drives the prism carrier to rotate about a first direction and a second direction perpendicular to the first direction with the cross axis as the fulcrum.

[0007] The cross axis includes a nodding axis extending along the second direction and a swaying axis extending along the first direction. The bottom end of the prism carrier is provided with a nodding axis mounting groove and a swaying axis mounting groove. The nodding axis is installed in the nodding axis mounting groove and the swaying axis is installed in the swaying axis mounting groove.

[0008] The prism carrier is provided with a limiting magnet mounting groove at its rear end, and a limiting magnet is installed in the limiting magnet mounting groove. The limiting magnet abuts against one end of the oscillating shaft.

[0009] A nodding position sensor is provided on the base at the bottom of the limiting magnet, and the nodding position sensor is arranged opposite to the limiting magnet.

[0010] Optionally, the prism driving mechanism includes a swaying magnet disposed on the side wall of the prism carrier, and the swaying shaft mounting groove adopts an asymmetrical V-groove structure.

[0011] Optionally, the line of intersection of the two sides of the oscillating shaft mounting groove is closer to the oscillating magnet relative to the axis of the oscillating shaft.

[0012] Optionally, one or more protruding structures are provided on the inner wall of the oscillating shaft mounting groove.

[0013] Optionally, the protrusion structure is an arc protrusion structure.

[0014] Optionally, the prism carrier is provided with support platform mounting slots on both sides, and the two ends of the nodding shaft are mounted on the support platforms on both sides of the base. Each support platform extends into a corresponding support platform mounting slot and supports the nodding shaft.

[0015] Optionally, the prism driving mechanism includes a swaying magnet disposed on the side wall of the prism carrier, and a support platform mounting groove is provided on one side near the middle and on the opposite side of the prism carrier.

[0016] The base is provided with two support platforms. The two ends of the nodding shaft are respectively mounted on the two support platforms. One of the two support platforms is located on the side as the first support platform, and the other is located near the center as the second support platform, so as to extend into the mounting grooves of the two support platforms. The oscillating magnet is located outside the second support platform.

[0017] Optionally, the top surface of the support platform is provided with a support mounting groove, and the end of the nodding shaft is disposed in the support mounting groove, wherein the support mounting groove adopts an asymmetrical V-shaped groove structure.

[0018] Optionally, a spring is further provided between the prism carrier and the base, and a spring limiting part is provided on one side of the spring, which is located outside one end of the nodding shaft and abuts against the nodding shaft.

[0019] Optionally, the spring limiting portion extends into the mounting groove of the support platform where the second support platform is located and abuts against one end of the nodding shaft.

[0020] Optionally, a spring support portion is also provided on one side of the spring, the spring support portion being located outside the spring limiting portion, and the outer side of the spring support portion abutting against the inner wall of the base.

[0021] Optionally, both the reed limiting part and the reed supporting part are vertical sheet-like structures.

[0022] Optionally, the lower part of the spring limiting portion is bent toward the side of the spring support portion, and the bottom end of the spring limiting portion is connected to the spring.

[0023] Optionally, the lower part of the spring support is bent toward the side of the spring limiting part, and the bottom end of the spring support is connected to the spring.

[0024] Optionally, one or more limiting grooves are provided on the reed limiting part.

[0025] Optionally, the reed is a rectangular frame structure, and the reed limiting part is disposed on the short side of the reed.

[0026] Optionally, the reed includes a plurality of prism carrier connecting parts for connecting to the bottom surface of the prism carrier and a plurality of base connecting parts for connecting to the inner bottom surface of the base. The prism carrier connecting parts and the base connecting parts are spaced apart and connected to each other by elastic spring wires. The plurality of prism carrier connecting parts, the plurality of base connecting parts and the plurality of elastic spring wires form a reed with a rectangular frame structure.

[0027] Optionally, the prism driving mechanism further includes a nodding coil disposed at the bottom of the base, a swaying coil disposed on the side wall of the base, a nodding magnet disposed at the bottom of the prism carrier, and a swaying magnet disposed on the side wall of the prism carrier, wherein the nodding coil and the nodding magnet are disposed opposite to each other, and the swaying coil and the swaying magnet are disposed opposite to each other.

[0028] The nodding coil and the shaking coil are powered by the base's built-in wiring located within the base.

[0029] Optionally, a head-shaking position sensor is provided in the middle of the head-shaking coil, and the head-shaking position sensor is positioned opposite to the head-shaking magnet.

[0030] Optionally, the lens driving device further includes a lens carrier and a zoom driving mechanism, wherein the lens carrier and the prism carrier are disposed in the base along a first direction, and the zoom driving mechanism drives the lens carrier to move along the first direction.

[0031] Optionally, the zoom drive mechanism includes a zoom coil disposed on the inner sidewall of the base and a zoom magnet disposed on the sidewall of the lens carrier, wherein the zoom coil and the zoom magnet are disposed opposite to each other.

[0032] Optionally, a ball groove is provided between the bottom end of the lens carrier and the inner bottom end of the base, and a ball is rotatably connected in the ball groove.

[0033] Optionally, an adsorption magnet is provided on one side of the bottom end of the lens carrier, and a base-embedded metal is provided inside the base. The base-embedded metal and the adsorption magnet are arranged opposite to each other and are attracted to each other.

[0034] Beneficial effects: This utility model has at least one or more of the following advantages:

[0035] 1. This utility model has a cross axis between the prism carrier and the rear end of the base. The prism carrier nods and shakes its head with the cross axis as the fulcrum, making the movement of the prism carrier easier and reducing the movement resistance of the prism carrier.

[0036] 2. To limit the position of the oscillating shaft, this invention provides a limiting magnet at the rear end of the prism carrier. This magnet can abut and limit one end of the oscillating shaft to prevent relative sliding between the oscillating shaft and the prism carrier. Simultaneously, in monitoring the nodding position of the prism carrier, the limiting magnet is used as a sensing magnet. The position monitoring effect of the prism carrier's nodding action is achieved through the cooperation of the limiting magnet and the nodding position sensor.

[0037] 3. The oscillating shaft mounting groove of this utility model adopts an asymmetrical V-shaped groove, which increases the magnetic resistance of the oscillating shaft to the oscillating magnet located on one side of the prism carrier. A protruding structure is provided on the inner wall of the asymmetrical V-shaped groove, which reduces the contact area between the prism carrier and the oscillating shaft, thereby reducing the frictional force when the prism carrier moves relative to the oscillating shaft.

[0038] 4. When the oscillating magnet is placed on one side of the prism carrier, it affects the design position of the support platform mounting groove that accommodates the second support platform. Therefore, the second support platform, which should be located on one side wall of the base, is placed closer to the center. Correspondingly, a support platform mounting groove for accommodating the second support platform is provided near the center of the side wall of the prism carrier. The cross shaft at the bottom of the prism carrier is mounted on the two support platforms. The oscillating magnet mounting groove for installing the oscillating magnet is located outside the support platform mounting groove for accommodating the second support platform. This design does not affect the installation operation of the oscillating magnet.

[0039] 5. This utility model provides a spring between the bottom end of the prism carrier and the base to increase the stability of the connection structure between the prism carrier and the base and improve the resetting effect.

[0040] This invention uses a spring-limiting part to abut against one end of the nodding shaft, thereby limiting the position of the nodding shaft through elastic thrust and preventing relative sliding between the nodding shaft and the prism carrier.

[0041] This invention increases the support effect of the spring limiting part by having the spring support part abut against the inner wall of the base, thus giving the spring limiting part better elastic potential energy and structural strength. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of this utility model;

[0043] Figure 2 for Figure 1 AA section view;

[0044] Figure 3 for Figure 1 BB section view;

[0045] Figure 4 for Figure 1 Exploded view;

[0046] Figure 5 for Figure 4 Further exploded view;

[0047] Figure 6 for Figure 5 Another schematic diagram of the prism carrier and lens carrier from the following angle;

[0048] Figure 7 This is a schematic diagram of the structure of the prism carrier of this utility model;

[0049] Figure 8 for Figure 7 A partial structural diagram;

[0050] Figure 9 for Figure 8 Exploded view;

[0051] Figure 10 for Figure 9 Partial exploded view;

[0052] Figure 11 for Figure 10 Partial structural diagram;

[0053] Figure 12 This is a schematic diagram of one structure of the reed of this utility model;

[0054] Figure 13 This is a schematic diagram of one structure of the base of this utility model;

[0055] Figure 14 for Figure 13 A partial structural diagram. Detailed Implementation

[0056] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are only for illustrating the essential spirit of the technical solution of the present invention.

[0057] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0058] Throughout this specification, references to "an 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. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0059] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0060] In the following description, the first direction is defined as the direction along the optical axis of the zoom lens, the second direction is the direction perpendicular to the first direction and parallel to the lower surface of the base, and the third direction is the direction perpendicular to the first and second directions. That is, the third direction is the direction of the plumb line when the base is normally placed. In other words, if a coordinate system is established with the third direction as the Z-axis and the first direction as the X-axis, then the second direction is the Y-axis.

[0061] Reference Figures 1 to 14 This utility model 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.

[0062] The lens carrier 30 and the prism carrier 20 are disposed within the base 10 along the first direction. Specifically, the base 10 may be provided with a prism carrier receiving cavity and a lens carrier receiving cavity along the first direction. The prism carrier 20 is used to install a prism and is disposed within the prism carrier receiving cavity, and the lens carrier 30 is used to install a zoom lens and is disposed within the lens carrier receiving cavity.

[0063] 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 the fulcrum, making the movement of the prism carrier 20 easier and reducing the resistance of the prism carrier 20.

[0064] The zoom drive mechanism drives the lens carrier 30 to move along a first direction to achieve zoom functionality. The prism drive mechanism drives the prism carrier 20 to rotate around the first direction and a second direction perpendicular to the first direction, using the cross axis 60 as a fulcrum, to achieve optical image stabilization. The prism carrier 20 drives the prism to perform nodding and shaking movements. The prism can deflect the direction of passing light, and the prism carrier 20 can move the prism to change the direction of light illumination. The nodding movement refers to the rotation of the prism carrier 20 around the second direction, and the shaking movement refers to the rotation around the first direction.

[0065] Reference Figure 9 and Figure 10 The cross axis 60 includes a nodding axis 61 extending in a second direction and a head-shaking axis 62 extending in a first direction. When the prism carrier 20 rotates around the nodding axis 61, the prism carrier 20 performs a nodding action; when the prism carrier 20 rotates around the head-shaking axis 62, the prism carrier 20 performs a head-shaking action.

[0066] The prism carrier 20 has a nodding shaft mounting groove 21 and a swaying shaft mounting groove 22 at its bottom end. The nodding shaft mounting groove 21 and the swaying shaft mounting groove 22 are perpendicular to each other and connected. The swaying shaft mounting groove 22 is located below the middle of the nodding shaft mounting groove 21. A nodding shaft 61 is installed in the nodding shaft mounting groove 21, and a swaying shaft 62 is installed in the swaying shaft mounting groove 22.

[0067] A limiting magnet mounting groove 23 is provided at the rear end of the prism carrier 20. A limiting magnet 63 is installed in the limiting magnet mounting groove 23, and the limiting magnet 63 abuts against one end of the oscillating shaft 62. A nodding position sensor 64 is provided on the base 10 at the bottom end of the limiting magnet 63, and the nodding position sensor 64 is positioned opposite to the limiting magnet 63.

[0068] To limit the position of the oscillating shaft 62, this invention provides a limiting magnet 63 at the rear end of the prism carrier 20. This magnet can abut and limit one end of the oscillating shaft 62 to prevent relative sliding between the oscillating shaft 62 and the prism carrier 20. Simultaneously, in monitoring the nodding position of the prism carrier 20, the limiting magnet 63 is used as a sensing magnet. The position monitoring effect of the nodding motion of the prism carrier 20 is achieved through the cooperation of the limiting magnet 63 and the nodding position sensor 64.

[0069] Preferably, the limiting magnet mounting groove 23 and the oscillating shaft mounting groove 22 are interconnected, so that the limiting magnet 63 abuts against one end of the oscillating shaft 62.

[0070] Of course, the other end of the oscillating shaft 62 is confined within the oscillating shaft mounting groove 22.

[0071] In one embodiment, the oscillating shaft 62 is a magnetic oscillating shaft, with one end of the oscillating shaft 62 being positioned opposite to and attracted to the limiting magnet 63.

[0072] In one embodiment, reference is made to Figures 8 to 11 The prism driving mechanism includes a wiggling magnet 44 disposed on the side wall of the prism carrier 20. A wiggling magnet mounting groove 26 is provided on one side of the prism carrier 20, and the wiggling magnet 44 is mounted within the wiggling magnet mounting groove 26. (See reference...) Figure 3 The oscillating shaft mounting groove 22 adopts an asymmetrical V-groove structure.

[0073] The oscillating shaft mounting groove 22 of this utility model adopts an asymmetrical V-shaped groove, which increases the magnetic resistance of the oscillating shaft 62 to the oscillating magnet 44 set on one side of the prism carrier 20.

[0074] In this embodiment, the asymmetric V-groove structure is relative to the symmetrical V-groove structure. The asymmetric V-groove has different angles on both sides or different lengths on the two sides.

[0075] In one embodiment, the line of intersection of the two sides of the oscillating shaft mounting groove 22 is closer to the oscillating magnet 44 relative to the axis of the oscillating shaft 62.

[0076] In one embodiment, reference is made to Figure 11 One or more protruding structures 24 are provided on the inner wall of the oscillating shaft mounting groove 22. The protruding structure 24 is preferably an arc protruding structure.

[0077] A protruding structure 24 is provided on the inner wall of the asymmetric V-groove, which reduces the contact area between the prism carrier 20 and the oscillating shaft 62, thereby reducing the frictional force when the prism carrier 20 oscillates relative to the oscillating shaft 62.

[0078] In one embodiment, the nodding shaft mounting groove 21 adopts an asymmetrical V-groove structure.

[0079] In one embodiment, the prism carrier 20 has support mounting slots on both sides. The two ends of the nodding shaft 61 are mounted on the support platforms on both sides of the base 10. After the prism carrier 20 and the base 10 are installed, one support platform extends into the corresponding support mounting slot and supports the nodding shaft 61.

[0080] In one embodiment, reference is made to Figures 8 to 11The prism driving mechanism includes a swaying magnet 44 disposed on the side wall of the prism carrier 20. A swaying magnet mounting groove 26 is provided on one side of the prism carrier 20, and the swaying magnet 44 is installed in the swaying magnet mounting groove 26. A support platform mounting groove is provided on one side of the prism carrier 20 near the middle and on the opposite side.

[0081] Reference Figure 3 , Figure 13 and Figure 14 The base 10 contains two support platforms, with the two ends of the nodding shaft 61 mounted on each platform. Of the two support platforms on the base 10, one serves as the first support platform 11a located on the side, and the other as the second support platform 11b located near the center. The first support platform 11a extends into the first support platform mounting groove 25a, and the second support platform 11b extends into the second support platform mounting groove 25b. The oscillating magnet 44 is located outside the second support platform 11b.

[0082] When the prism carrier 20 is equipped with a swaying magnet 44 on one side, it affects the design position of the second support platform mounting groove 25b that accommodates the second support platform 11b. Therefore, the second support platform 11b, which should be located on one side wall of the base 10, is located closer to the center. Correspondingly, a second support platform mounting groove 25b is provided on the side wall of the prism carrier 20 near the center to accommodate the second support platform 11b. The nodding shaft 61 at the bottom of the prism carrier 20 is mounted on the two support platforms. The swaying magnet mounting groove 26 for mounting the swaying magnet 44 is located outside the second support platform mounting groove 25b. This design does not affect the installation operation of the swaying magnet 44.

[0083] In one embodiment, a support mounting groove is provided on the top surface of the support platform, and the end of the nodding shaft 61 is disposed in the support mounting groove. The support mounting groove adopts an asymmetrical V-shaped groove structure.

[0084] In one embodiment, reference is made to Figure 3 , Figure 7 and Figure 12 A spring 70 is also provided between the prism carrier 20 and the base 10. A spring limiting part 71 is provided on one side of the spring 70. The spring limiting part 71 is located outside one end of the nodding shaft 61 and abuts against the nodding shaft 61.

[0085] This invention incorporates a spring 70 between the bottom end of the prism carrier 20 and the base 10 to enhance the stability of the connection structure between the prism carrier 20 and the base 10, and to improve the resetting effect. The spring limiting part 71 abuts against one end of the nodding shaft 61, thereby limiting the position of the nodding shaft 61 through elastic thrust and preventing relative sliding between the nodding shaft 61 and the prism carrier 20. Of course, since the other end of the nodding shaft 61 is located on the first support platform, the other end of the nodding shaft 61 can be confined within the side wall of the base 10.

[0086] In one embodiment, when the prism carrier 20 has a second support platform mounting groove 25b, the spring limiting part 71 extends into the second support platform mounting groove 25b where the second support platform 11b is located and abuts against one end of the nodding shaft 61.

[0087] In one embodiment, reference is made to Figure 3 , Figure 7 and Figure 12 A spring support portion 72 is also provided on one side of the spring 70. The spring support portion 72 is located outside the spring limiting portion 71, and the outer side of the spring support portion 72 abuts against the inner wall of the base 10.

[0088] This invention increases the support effect on the spring limiting part 71 by having the spring support part 72 abut against the inner wall of the base 10, thereby giving the spring limiting part 71 better elastic potential energy and structural strength.

[0089] In one embodiment, reference is made to Figure 12 Both the spring limiting part 71 and the spring supporting part 72 are vertical sheet-like structures.

[0090] In one embodiment, the lower part of the reed limiting portion 71 is bent toward the reed support portion 72, and the bottom end of the reed limiting portion 71 is connected to the reed 70. The reed limiting portion 71 and the reed 70 are preferably integrally connected.

[0091] In one embodiment, the lower part of the spring support portion 72 is bent toward the spring limiting portion 71, and the bottom end of the spring support portion 72 is connected to the spring 70. Preferably, the spring support portion 72 and the spring 70 are integrally connected.

[0092] In one embodiment, one or more limiting grooves are provided on the reed limiting part 71.

[0093] In one embodiment, when the reed support 72 is located on the side close to the oscillating magnet 44, the reed support 72 is provided with a reed clearance groove for better oscillating magnet 44 relative to its outer oscillating coil.

[0094] In one embodiment, reference is made to Figure 12The reed 70 has a rectangular frame structure, and the reed limiting part 71 is located on the short side of the reed 70.

[0095] When the reed support portion 72 is present, the reed support portion 72 is also provided on the short side of the reed 70.

[0096] In one embodiment, reference is made to Figure 12 The reed 70 includes a plurality of prism carrier connecting parts 73 for connecting to the bottom surface of the prism carrier 20 and a plurality of base connecting parts 74 for connecting to the inner bottom surface of the base 10. The prism carrier connecting parts 73 and the base connecting parts 74 are spaced apart and connected to each other by elastic spring wires 75. The plurality of prism carrier connecting parts 73, the plurality of base connecting parts 74 and the plurality of elastic spring wires 75 form a reed 70 with a rectangular frame structure.

[0097] Specifically, the two rectangular sheet-like base connecting parts 74 form the short side of a rectangular frame-like structure. The two rectangular sheet-like prism carrier connecting parts 73 form the long side of the rectangular frame-like structure. The four corners of the rectangular frame-like structure are four elastic spring wires 75, with one end of each elastic spring wire 75 connected to the prism carrier connecting part 73 and the other end connected to the base connecting part 74.

[0098] A base connection hole can be provided on the base connection part 74, which has a rectangular sheet structure, and a base connection post can be provided on the base, with the base connection hole inserted into the base connection post.

[0099] A carrier connection hole can be provided on the prism carrier connection part 73, which has a rectangular sheet structure, and a spring connection protrusion can be provided at the bottom end of the prism carrier. The carrier connection hole is inserted into the spring connection protrusion.

[0100] In one embodiment, the elastic spring wire 75 has a zigzag-shaped bend structure.

[0101] In one embodiment, the elastic spring wire 75 is a series of U-shaped bends.

[0102] When the elastic spring wire 75 consists of several U-shaped bends connected in series, the lengths of the various U-shaped bends may be the same or different.

[0103] In one embodiment, reference is made to Figures 2 to 14 The prism driving mechanism includes a nodding coil 41 disposed at the bottom of the base 10, a swaying 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 swaying magnet 44 disposed on the side wall of the prism carrier 20. The nodding coil 41 and the nodding magnet 43 are arranged opposite to each other, and the two work together to realize the nodding action of the prism carrier 20. The swaying coil 42 and the swaying magnet 44 are arranged opposite to each other, and the two work together to realize the swaying action of the prism carrier 20.

[0104] The nodding coil and the shaking coil are powered by the built-in circuitry of the base 10.

[0105] In one embodiment, a head-shaking position sensor 65 is disposed in the middle of the head-shaking coil 42, and the head-shaking position sensor 65 is disposed opposite to the head-shaking magnet 44.

[0106] In the monitoring of the prism carrier's swaying position, the swaying position is monitored by using a swaying position sensor in conjunction with a swaying magnet 44.

[0107] In one embodiment, the bottom end of the prism carrier 20 is provided with a nodding magnet mounting groove 27, and the nodding magnet 43 is installed in the nodding magnet mounting groove 27. The nodding magnet mounting groove 27 is located below the cross shaft mounting groove formed by the nodding shaft mounting groove 21 and the yaw shaft mounting groove 22.

[0108] In one embodiment, the zoom drive mechanism includes a zoom coil 45 disposed on the side wall of the base 10 and a zoom magnet 46 disposed on the side wall of the lens carrier 30. The zoom coil 45 and the zoom magnet 46 are disposed opposite to each other, and the lens carrier 30 is driven to move along the optical axis of the zoom lens through the cooperation of the two.

[0109] The zoom coil 45 is powered by the built-in circuitry located in the base 10.

[0110] In one embodiment, one or more ball bearing grooves 81 are respectively provided on both sides of the bottom end of the base 10 and on both sides of the bottom end of the lens carrier 30. Ball bearings 80 are installed in the ball bearing grooves 81, and the upper and lower ends of the ball bearings 80 on one side are in contact with the upper and lower ball bearing grooves 81 on the same side, respectively. The ball bearings 80 provide rolling support for the lens carrier 30.

[0111] The number of ball grooves 81 on both sides of the bottom of the base 10 and on both sides of the bottom of the lens carrier 30, and the number of balls 80 in the ball grooves 81 are not limited and can be determined according to the actual situation.

[0112] In one embodiment, the ball groove 81 is one of a V-groove, a circular arc groove, or a planar groove.

[0113] In one embodiment, an adsorption magnet 90 is provided on one side of the bottom end of the lens carrier 30, and a base metal is provided inside the base 10. The base metal and the adsorption magnet 90 are arranged opposite to each other and are attracted to each other.

[0114] The built-in metal in the base generates an attractive force with the magnet 90, which keeps the zoom carrier firmly against the base and prevents the ball bearings from detaching.

[0115] In one embodiment, the lens driving device further includes a housing 50, which is detachably connected to the base 10, with a receiving cavity between them. The prism carrier 20, lens carrier 30, prism driving mechanism, and zoom driving mechanism are disposed within the receiving cavity. A light inlet may be provided on the housing 50, which is positioned relative to the prism on the prism carrier 20.

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

Claims

1. A lens driving device, comprising a base, a prism carrier, and a prism driving mechanism, wherein the prism carrier is disposed within the base, a cross axis is disposed between the prism carrier and the base, and the prism driving mechanism drives the prism carrier to rotate about a first direction and a second direction perpendicular to the first direction with the cross axis as the fulcrum, wherein the cross axis includes a nodding axis extending along the second direction and a tilting axis extending along the first direction. Its features are, A limiting magnet is provided at the rear end of the prism carrier, and the limiting magnet abuts against one end of the oscillating shaft; A nodding position sensor is provided on the base at the bottom of the limiting magnet, and the nodding position sensor is arranged opposite to the limiting magnet.

2. The lens driving device as described in claim 1, characterized in that, The prism driving mechanism includes a swaying magnet disposed on the side wall of the prism carrier. The bottom end of the prism carrier is provided with a nodding shaft mounting groove and a swaying shaft mounting groove. The nodding shaft is installed in the nodding shaft mounting groove, and the swaying shaft is installed in the swaying shaft mounting groove. The swaying shaft mounting groove adopts an asymmetrical V-shaped groove structure. And / or, the prism driving mechanism further includes a nodding coil disposed at the bottom of the base, a swaying coil disposed on the side wall of the base, a nodding magnet disposed at the bottom of the prism carrier, and a swaying magnet disposed on the side wall of the prism carrier, wherein the nodding coil is disposed opposite to the nodding magnet, and the swaying coil is disposed opposite to the swaying magnet; the nodding coil and the swaying coil are powered by the base's built-in circuitry disposed within the base.

3. The lens driving device as described in claim 2, characterized in that, The line of intersection of the two sides of the swaying shaft mounting groove is closer to the swaying magnet than the axis of the swaying shaft. And / or, one or more protruding structures are provided on the inner wall of the oscillating shaft mounting groove; And / or, a head-shaking position sensor is provided in the middle of the head-shaking coil, and the head-shaking position sensor is positioned opposite to the head-shaking magnet.

4. The lens driving device as described in claim 3, characterized in that, The protruding structure is an arc-shaped protruding structure.

5. The lens driving device as described in claim 1, characterized in that, The prism carrier has support mounting slots on both sides, and the two ends of the nodding shaft are mounted on the support platforms on both sides of the base. Each support platform extends into a corresponding support mounting slot and supports the nodding shaft. or, The prism driving mechanism includes a swaying magnet disposed on the side wall of the prism carrier. The prism carrier has a support platform mounting groove on one side near the center and on the opposite side. The base is provided with two support platforms. The two ends of the swaying shaft are respectively mounted on the two support platforms. One of the two support platforms is located on the side as the first support platform, and the other is located near the center as the second support platform, so as to extend into the mounting grooves of the two support platforms. The swaying magnet is located outside the second support platform.

6. The lens driving device as described in claim 5, characterized in that, A spring is also provided between the prism carrier and the base. A spring limiting part is provided on one side of the spring. The spring limiting part is located outside one end of the nodding shaft and abuts against the nodding shaft.

7. The lens driving device as described in claim 6, characterized in that, The spring limiting part extends into the mounting groove of the support platform where the second support platform is located and abuts against one end of the nodding shaft; And / or, a spring support portion is also provided on one side of the spring, the spring support portion is located outside the spring limiting portion, and the outer side of the spring support portion abuts against the inner wall of the base.

8. The lens driving device as described in claim 7, characterized in that, Both the spring limiting part and the spring supporting part are vertical sheet-like structures; And / or, the lower part of the spring limiting part is bent toward the side of the spring support part, and the bottom end of the spring limiting part is connected to the spring; And / or, the lower part of the spring support is bent toward the spring limiting part, and the bottom end of the spring support is connected to the spring; And / or, one or more limiting grooves are provided on the reed limiting part; And / or, the reed is a rectangular frame structure, and the reed limiting part is disposed on the short side of the reed; And / or, the reed includes a plurality of prism carrier connecting parts for connecting to the bottom surface of the prism carrier, a plurality of base connecting parts for connecting to the inner bottom surface of the base, the prism carrier connecting parts and the base connecting parts being spaced apart and connected to each other by elastic spring wires, the plurality of prism carrier connecting parts, the plurality of base connecting parts and the plurality of elastic spring wires forming a reed with a rectangular frame structure.

9. The lens driving device according to any one of claims 1 to 8, characterized in that, The lens driving device further includes a lens carrier and a zoom driving mechanism. The lens carrier and the prism carrier are disposed in the base along a first direction, and the zoom driving mechanism drives the lens carrier to move along the first direction.

10. The lens driving device as described in claim 9, characterized in that, The zoom drive mechanism includes a zoom coil disposed on the inner side wall of the base and a zoom magnet disposed on the side wall of the lens carrier, wherein the zoom coil and the zoom magnet are disposed opposite to each other. And / or, a ball groove is provided between the bottom end of the lens carrier and the inner bottom end of the base, and a ball is rotatably connected in the ball groove; And / or, an adsorption magnet is provided on one side of the bottom end of the lens carrier, and a base-embedded metal is provided inside the base, with the base-embedded metal and the adsorption magnet being arranged opposite to each other and adsorbing each other.

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