Lens drive device

Abstract

This utility model belongs to the field of optical imaging equipment technology, specifically relating to a lens driving device, including a base, a lens carrier, and a zoom driving mechanism. 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. The zoom driving mechanism includes a zoom coil and a zoom magnet. The ball groove at the bottom end of the lens carrier is a lens carrier ball groove. A zoom magnet mounting groove is provided on one side wall of the lens carrier. The bottom end of the zoom magnet mounting groove is connected to the middle of the lens carrier ball groove on the same side. A zoom magnet is installed in the zoom magnet mounting groove, and the zoom magnet divides the lens carrier ball groove into two independent areas, each of which is provided with a ball. This utility model achieves the limitation of the ball by blocking the lens carrier ball groove with a zoom magnet. By setting a ball between the lens carrier and the base, the resistance of the zoom movement of the lens carrier can be reduced.

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 rear, and the imaging chip is located at the front 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 lens can usually zoom on the base to achieve zooming. This requires a zoom magnet and a zoom coil that works with it. How to achieve stable zooming of the lens is a problem that needs to be solved. 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 lens carrier, and a zoom driving mechanism, wherein the zoom driving mechanism drives the lens carrier to move within the base along a first direction.

[0007] A ball groove is provided between the bottom end of the lens carrier and the bottom end of the base, and a ball is rotatably connected in the ball groove;

[0008] 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.

[0009] The ball bearing groove at the bottom of the lens carrier is the lens carrier ball bearing groove, and the length direction of the lens carrier ball bearing groove is the first direction. A zoom magnet mounting groove is provided on one side wall of the lens carrier. The bottom end of the zoom magnet mounting groove is connected to the middle part of the lens carrier ball bearing groove on the same side. The zoom magnet is installed in the zoom magnet mounting groove. The zoom magnet divides the lens carrier ball bearing groove into two independent areas, and the two independent areas are respectively provided with the ball bearing.

[0010] Optionally, the lens carrier ball groove is disposed on both sides of the bottom end of the lens carrier. The lens carrier ball groove on the same side as the zoom magnet mounting groove extends from one end of the bottom end of the lens carrier along a first direction to the other end of the bottom end of the lens carrier, and the lens carrier ball groove on the side away from the zoom magnet mounting groove is located in the middle of the bottom end of the lens carrier.

[0011] Optionally, an adsorption magnet is provided on the bottom end of the lens carrier away from the zoom magnet mounting groove, and a first base built-in metal is provided inside the base, which is arranged opposite to and adsorbs the adsorption magnet.

[0012] Optionally, the lens carrier is provided with one or more anti-collision block mounting slots on the front and rear end faces in the first direction, and anti-collision blocks are installed in the anti-collision block mounting slots, with one end of the anti-collision block extending out of the anti-collision block mounting slot.

[0013] Optionally, the ends of the anti-collision block have a pointed structure.

[0014] Optionally, the anti-collision block is made of a flexible soft rubber material.

[0015] Optionally, the base is provided with a light outlet that communicates with the inside and outside. The light outlet is located at the front end of the lens carrier. An insert plate slot is provided inside the light outlet. An insert plate is inserted into the insert plate slot. The insert plate is provided with clearance holes. The clearance holes on different insert plates are of different sizes. The size of the light outlet of the base can be adjusted by changing the insert plate.

[0016] Optionally, the lens driving device further includes a prism carrier and a prism driving mechanism, wherein the lens carrier and the prism carrier are disposed in the front and rear positions within the base along a first direction;

[0017] A cross axis is provided between the prism carrier and the base. The prism driving mechanism drives the prism carrier to rotate around a first direction and a second direction perpendicular to the first direction with the cross axis as the fulcrum. The cross axis includes a head-shaking axis extending along the first direction and a head-nodding axis extending along the second direction.

[0018] 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.

[0019] Optionally, the prism driving mechanism 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.

[0020] A swaying magnet mounting groove is provided on one side of the prism carrier, and the swaying magnet is installed in the swaying magnet mounting groove. A support platform mounting groove is provided on one side of the prism carrier near the middle and on the opposite side.

[0021] 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 swaying magnet is located outside the second support platform.

[0022] The spring limiting part extends into the position between the support platform mounting groove where the second support platform is located and the oscillating magnet mounting groove.

[0023] 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.

[0024] Optionally, the spring support portion adopts a U-shaped structure with the opening facing upwards.

[0025] Optionally, the spring is provided with a plurality of spring fixing holes, and the bottom end of the prism carrier and / or the inner bottom end of the base is provided with a plurality of fixing posts. The fixing posts adopt a conical structure or a truncated conical structure, and the spring is connected to the prism carrier and / or the base by being inserted into the fixing posts through the spring fixing holes.

[0026] Optionally, the prism carrier is provided with a plurality of anti-collision protrusions at the top and around the perimeter, and the thickness of the anti-collision protrusions on the rear side of the prism carrier in the first direction is less than the thickness of the anti-collision protrusions at other locations.

[0027] Optionally, the nodding coil and the shaking coil are powered by a base-built-in circuit disposed within the base.

[0028] Optionally, the bottom end of the prism carrier is provided with a nodding shaft mounting groove and a swaying shaft mounting groove, wherein the nodding shaft is installed in the nodding shaft mounting groove and the swaying shaft is installed in the swaying shaft mounting groove;

[0029] The bottom end of the prism carrier is provided with a nodding magnet mounting groove, and the nodding magnet is installed in the nodding magnet mounting groove. The nodding magnet mounting groove is located below the cross shaft mounting groove formed by the connection of the nodding shaft mounting groove and the swaying shaft mounting groove.

[0030] Optionally, the base is provided with a nodding position sensor, and the rear end of the prism carrier is provided with a sensing magnet mounting groove. The sensing magnet mounting groove is located at the rear end of the first direction of the oscillating shaft mounting groove. A sensing magnet is installed in the sensing magnet mounting groove, and the sensing magnet is arranged opposite to the nodding position sensor.

[0031] Optionally, the nodding position sensor is located on the rear side of the nodding coil in the first direction.

[0032] Optionally, a zoom position sensor is disposed in the middle of the zoom coil, and a yaw position sensor is disposed in the middle of the yaw coil.

[0033] Optionally, the base is provided with a second base built-in metal, which is respectively arranged opposite to the sensing magnet and the nodding magnet and attracts each other.

[0034] Optionally, the zoom coil, the nodding coil, the swaying coil, the nodding position sensor, the swaying position sensor, and the zoom position sensor are formed together with the base by injection molding;

[0035] The first base has built-in metal, the second base has built-in metal, and the base has built-in wiring, which are manufactured together with the base by injection molding.

[0036] Optionally, the lens driving device further includes a housing, which is detachably connected to the base to form a receiving cavity, and the prism carrier, the lens carrier, the prism driving mechanism and the zoom driving mechanism are disposed within the receiving cavity.

[0037] Optionally, one of the outer casing and the base is provided with a slot and the other is provided with a buckle, and the outer casing and the base are detachably connected by engaging the slot and the buckle.

[0038] Optionally, the outer casing has a slot on its side, and the base has a buckle on its side. The outer surface of the buckle is an inclined surface that slopes from the inner side above to the outer side below.

[0039] Optionally, one of the outer shell and the base is provided with a positioning groove and the other is provided with a positioning protrusion. The positioning of the outer shell and the base is achieved by the positioning groove and the positioning protrusion being inserted into each other.

[0040] Beneficial effects: This utility model has at least one or more of the following advantages:

[0041] 1. This utility model reduces the resistance of the zoom movement of the lens carrier by setting a ball bearing between the lens carrier and the base.

[0042] In this invention, the ball bearings are limited by blocking the ball bearing groove of the lens carrier with a zoom magnet, so that the balls in each independent area roll independently, thus avoiding the problem of the lens carrier not moving smoothly when zooming, which would be caused by all the balls being located at one end.

[0043] 2. This utility model uses the adsorption force generated between the adsorption magnet and the built-in metal of the first base to make the connection structure between the lens carrier and the base more stable and avoid the phenomenon of ball bearings coming out of the groove.

[0044] 3. This utility model features anti-collision blocks at both ends of the lens carrier, which act as a buffer when the lens carrier moves and collides with the base. The anti-collision blocks have a pointed end, which reduces the impact force when the anti-collision block contacts the base, resulting in better buffering effect.

[0045] 4. 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.

[0046] The spring-limiting part abuts against one end of the nodding shaft to limit the position of the nodding shaft through the elastic thrust of the spring-limiting part, thereby preventing relative sliding between the nodding shaft and the prism carrier.

[0047] The spring support abuts against the inner wall of the base, increasing the support effect on the spring limiting part and giving it better elastic potential energy and structural strength. The U-shaped structure of the spring support part allows it to avoid the oscillating coil on its outer side and prevents scratches.

[0048] In this design, the traditional hot riveting method is abandoned in the connection between the reed and the prism carrier and / or base. Instead, a tapered hole mating structure is adopted to position the reed through a tapered angle.

[0049] 5. The anti-collision protrusions on the top, front, and sides of the prism carrier of this utility model are slightly higher (thicker) than the rear anti-collision protrusion, in order to achieve the purpose of a first-level and second-level step. During the nodding action, there can be two stages of impact, reducing the frontal impact space, mitigating the impact force during impact, dispersing the impact intensity, while ensuring that the head-shaking and nodding drives have sufficient mechanical space.

[0050] 6. The outer shell and base of this utility model are detachably connected via slots and buckles. When the buckle is designed with an angled surface, the outer shell can be directly pressed to connect to the base under the guidance of the angled surface, making the connection simple, convenient, and effortless. Attached Figure Description

[0051] Figure 1 This is an exploded view of the structure of this utility model;

[0052] Figure 2 This is a schematic diagram of the structure outside the outer shell of this utility model;

[0053] Figure 3 for Figure 2 Top view;

[0054] Figure 4 for Figure 3 AA section view;

[0055] Figure 5 for Figure 3 BB cross-sectional view;

[0056] Figure 6 for Figure 2 Exploded view;

[0057] Figure 7 This is a schematic diagram of one structure of the base of this utility model;

[0058] Figure 8 for Figure 7 A schematic diagram of the structure after the spring is installed;

[0059] Figure 9 for Figure 7 A partial internal structure diagram;

[0060] Figure 10 This is a schematic diagram of the structure of the lens carrier and prism carrier of this utility model;

[0061] Figure 11 for Figure 10 An exploded view of a lens carrier;

[0062] Figure 12 for Figure 10 Another angle diagram of the prism carrier after the spring is installed;

[0063] Figure 13 for Figure 10 Another schematic diagram of the medium prism carrier;

[0064] Figure 14 for Figure 13 Partial structural diagram;

[0065] Figure 15 for Figure 13 An exploded view. Detailed Implementation

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] Reference Figures 1 to 15 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.

[0072] The lens carrier 30 and the prism carrier 20 are arranged front to back within the base 10 along a first direction, meaning that the lens carrier 30 is located in front of the prism carrier 20. Specifically, the base 10 may have a prism carrier receiving cavity and a lens carrier receiving cavity arranged along the first direction. The prism carrier 20 is used to mount a prism and is disposed within the prism carrier receiving cavity, and the lens carrier 30 is used to mount a zoom lens and is disposed within the lens carrier receiving cavity.

[0073] The zoom drive mechanism drives the lens carrier 30 to move along a first direction within the base 10 to achieve the zoom function. 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 positioned opposite each other, and their cooperation drives the lens carrier 30 to move along the optical axis of the zoom lens. The zoom coil 45 is preferably powered by a built-in circuit 11 within the base 10.

[0074] The prism driving mechanism drives the prism carrier 20 to rotate within the base 10 around a first direction and a second direction perpendicular to the first direction 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.

[0075] Reference Figures 6 to 8 , Figure 10 and Figure 11 One or more ball grooves 81 are 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. Balls 80 are installed in the ball grooves 81. The upper and lower ends of the ball 80 on one side are in contact with the upper and lower ball grooves 81 on the same side, respectively, and the ball 80 can roll freely in the ball grooves 81. The ball 80 provides rolling support for the lens carrier 30, which can reduce the resistance of the zoom movement of the lens carrier 30.

[0076] The number of ball grooves 81 on both sides of the bottom end of the base 10 and on both sides of the bottom end 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. Preferably, the ball groove at the bottom end of the lens carrier 30 is the lens carrier ball groove 31, and the length direction of the lens carrier ball groove 31 is the first direction.

[0077] Reference Figure 10 and Figure 11A zoom magnet mounting groove 32 is provided on one side wall of the lens carrier 30. The bottom end of the zoom magnet mounting groove 32 is connected to the middle of the lens carrier ball bearing groove 31 on the same side. A zoom magnet 46 is installed in the zoom magnet mounting groove 32, which divides the lens carrier ball bearing groove 31 into two independent areas. Each independent area is provided with a ball bearing 80. By blocking the lens carrier ball bearing groove 31 with the zoom magnet 46, the ball bearing 80 is limited, so that the ball bearing 80 in each independent area rolls independently, thus avoiding the problem of the lens carrier 30 not moving smoothly during zooming, which would be caused by all the ball bearing 80 being located at one end.

[0078] In one embodiment, the ball groove 81 is one of a V-groove, a circular arc groove, or a planar groove.

[0079] like Figure 6 As shown, the ball groove 81 on one side of the bottom inner end of the base 10 adopts a V-shaped groove, as shown in the figure. Figure 7 The ball groove 81 on the other side of the inner bottom of the base 10 is a flat groove. For example... Figure 10 and Figure 11 As shown, the lens carrier ball groove 31 on one side of the bottom end of the lens carrier 30 adopts a V-shaped groove, while the lens carrier ball groove 31 on the other side of the bottom end of the lens carrier 30 adopts a flat groove.

[0080] In one embodiment, reference is made to Figure 10 and Figure 11 The lens carrier ball grooves 31 are located on both sides of the bottom end of the lens carrier 30. The lens carrier ball groove 31 on the same side as the zoom magnet mounting groove 32 extends from one end of the bottom end of the lens carrier 30 along a first direction to the other end of the bottom end of the lens carrier 30. That is to say, the lens carrier ball groove 31 on this side is a relatively long ball groove, which almost spans the entire bottom end of the lens carrier 30. The lens carrier ball groove 31 on the side away from the zoom magnet mounting groove is located in the middle of the bottom end of the lens carrier 30. That is to say, the lens carrier ball groove 31 on this side is a relatively short ball groove, which is located in the middle of the bottom end of the lens carrier 30. With the above design, the lens carrier ball grooves 31 at the bottom end of the lens carrier 30 form a triangular or triangular distribution pattern under the separation of the zoom magnet 46.

[0081] In one embodiment, reference is made to Figure 10 and Figure 11 An adsorption magnet 33 is provided on the bottom side of the lens carrier 30 away from the zoom magnet mounting groove 32. A first base built-in metal 12 is provided inside the base 10. The first base built-in metal 12 and the adsorption magnet 33 are arranged opposite to each other and are attracted to each other.

[0082] The built-in metal 12 in the first base generates an attractive force with the adsorption magnet 33, causing the lens carrier to be tightly pressed against the base, making the connection structure between the lens carrier and the base more stable and preventing the ball bearings from coming out of the groove.

[0083] In one embodiment, reference is made to Figure 11 The bottom end of the lens carrier 30, away from the zoom magnet mounting groove 32, is provided with an adsorption magnet mounting groove 36, and the adsorption magnet 33 is installed in the adsorption magnet mounting groove 36.

[0084] In one embodiment, reference is made to Figure 10 and Figure 11 The lens carrier 30 has one or more anti-collision block mounting grooves 34 on its front and rear end faces in the first direction. Anti-collision blocks 35 are installed in the anti-collision block mounting grooves 34, and one end of the anti-collision block 35 in the first direction extends out of the anti-collision block mounting groove 34.

[0085] Since the lens carrier 30 moves within the base 10 along the first direction, this embodiment provides anti-collision blocks 35 at both ends of the lens carrier 30 in the first direction, which can buffer the lens carrier 30 when it moves and collides with the base 10.

[0086] In one embodiment, reference is made to Figure 10 and Figure 11 The ends of the anti-collision block 35 are designed with pointed ends.

[0087] The pointed structure in this embodiment can be a triangular pyramid, a triangular prism, a square pyramid, a square prism, or other polyhedral pyramid or polyprism structure. The anti-collision block 35 is designed with a pointed end, which can reduce the collision force when the anti-collision block 35 and the base 10 collide, resulting in a better buffering effect.

[0088] In one embodiment, the anti-collision block 35 is made of a flexible soft rubber material, which can buffer the lens carrier 30 when it moves and collides with the base 10.

[0089] In one embodiment, reference is made to Figures 6 to 8 The base 10 is provided with a light outlet 13 that is connected to the inside and outside. The light outlet 13 is located at the front end of the lens carrier 30. The inner side of the light outlet 13 is provided with a plate slot, and a plate 14 is inserted into the plate slot. The plate 14 is provided with a clearance hole 141. The clearance hole 141 on different plates 14 is of different sizes. The size of the light outlet 13 of the base 10 can be adjusted as needed by replacing the plate 14 with a different aperture, thereby changing the angle range of the emitted light.

[0090] In one embodiment, a cross axis is provided between the prism carrier 20 and the base 10. The prism driving mechanism drives the prism carrier 20 to rotate around the first direction and the second direction with the cross axis as the fulcrum, so as to realize the prism carrier 20 to nod and shake its head with the cross axis as the fulcrum, making the movement of the prism carrier 20 easier and reducing the movement resistance of the prism carrier 20.

[0091] Reference Figure 10 , Figures 13 to 15 The cross axis 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.

[0092] Reference Figure 6 and Figure 8 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.

[0093] 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 invention uses a spring-limiting portion 71 to abut 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, the other end of the nodding shaft 61 is confined within the side wall of the base 10.

[0094] In one embodiment, reference is made to Figures 4 to 10 , Figures 12 to 15 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.

[0095] The nodding coil 41 and the shaking coil 42 are preferably powered by the base built-in circuit 11 located in the base 10.

[0096] Reference Figures 12 to 15 A prism carrier 20 has a swaying magnet mounting groove 21 on one side, and a swaying magnet 44 is installed in the swaying magnet mounting groove 21. A support platform mounting groove 22 is provided on one side of the prism carrier 20 near the middle and on the opposite side.

[0097] Reference Figures 6 to 8 The base 10 contains two support platforms. The two ends of the nodding shaft 61 are respectively mounted on the two support platforms. One support platform, 15a, is located on the side, and the other, 15b, is located near the center, extending into the mounting slots 22 of the two support platforms. The oscillating magnet 44 is located outside the second support platform 15b. (See reference...) Figure 12and Figure 15 The spring limiting part 71 extends into the position between the support platform mounting groove 22 where the second support platform 15b is located and the head-shaking magnet mounting groove 21. That is to say, the spring limiting part 71 is located between the head-shaking magnet 44 and one side of the head-shaking shaft 61 and abuts against one side of the head-shaking shaft 61.

[0098] When the prism carrier 20 is equipped with a swaying magnet 44 on one side, it affects the design position of the support platform mounting groove that accommodates the second support platform 15b. Therefore, the second support platform 15b, which should be located on one side wall of the base 10, is positioned closer to the center. Correspondingly, a support platform mounting groove 22 is provided on the side wall of the prism carrier 20 near the center to accommodate the second support platform 15b. The nodding shaft 61 at the bottom of the prism carrier 20 is mounted on the two support platforms. The swaying magnet mounting groove 21 for mounting the swaying magnet 44 is located outside the support platform mounting groove 22 corresponding to the second support platform 15b. This design does not affect the installation operation of the swaying magnet 44.

[0099] 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 preferably adopts a V-shaped groove structure.

[0100] In one embodiment, reference is made to Figure 6 and Figure 8 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.

[0101] 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.

[0102] In one embodiment, the reed support 72 adopts a U-shaped structure with the opening facing upwards. This U-shaped structure allows the reed support 72 to avoid contact with the oscillating coil on its outer side and prevents scratches.

[0103] In one embodiment, reference is made to Figure 6 , Figure 12 and Figure 13 The reed 70 has several reed fixing holes 73, and the bottom end of the prism carrier 20 has several prism carrier fixing posts 23. The reed 70 is connected to the bottom end of the prism carrier 20 by inserting the reed fixing holes 73 into the prism carrier fixing posts 23. And / or, refer to Figures 6 to 8 The spring 70 is provided with several spring fixing holes 73, and the bottom of the base 10 is provided with several base fixing posts 16. The spring 70 is connected to the base 10 by inserting the spring fixing holes 73 into the base fixing posts 16.

[0104] Both the prism carrier fixing post 23 and the base fixing post 16 adopt a conical structure or a truncated conical structure. In this embodiment, the spring 70 and the prism carrier 20 and / or base 10 abandon the traditional hot riveting method and instead adopt a conical hole mating structure to achieve positioning through taper.

[0105] In one embodiment, reference is made to Figure 6 , Figure 10 , Figures 12 to 15 The prism carrier 20 has several anti-collision protrusions 24 on its top and around its perimeter. The thickness of the rear anti-collision protrusion 24a on the rear side of the prism carrier 20 in the first direction is less than the thickness of the anti-collision protrusions 24 in other positions.

[0106] In this embodiment, the anti-collision protrusions 24 at the top, front, and sides of the prism carrier 20 are slightly higher (thicker) than the rear anti-collision protrusion 24a, in order to achieve the purpose of a first-level and second-level step. During the nodding action, there can be two stages of impact, reducing the frontal impact space, mitigating the impact force during impact, dispersing the impact intensity, while ensuring that the head-shaking and nodding drives have sufficient mechanical space.

[0107] In one embodiment, reference is made to Figures 13 to 15 The prism carrier 20 has a nodding shaft mounting groove 25 and a swaying shaft mounting groove 26 at its bottom end. The nodding shaft mounting groove 25 and the swaying shaft mounting groove 26 are perpendicular to each other and connected. The swaying shaft mounting groove 26 is located below the middle of the nodding shaft mounting groove 25. A nodding shaft 61 is installed in the nodding shaft mounting groove 25, and a swaying shaft 62 is installed in the swaying shaft mounting groove 26. The bottom end of the prism carrier 20 has a nodding magnet mounting groove 27, in which a nodding magnet 43 is installed. The nodding magnet mounting groove 27 is located below the cross shaft mounting groove formed by the connection of the nodding shaft mounting groove 25 and the swaying shaft mounting groove 26.

[0108] In one embodiment, reference is made to Figures 6 to 9 A head position sensor 91 is provided on the base 10, and a magnetic induction mounting groove 28 is provided at the rear end of the prism carrier 20. The magnetic induction mounting groove 28 is located at the rear end of the first direction of the oscillating shaft mounting groove 26. A magnetic induction magnet 92 is installed in the magnetic induction mounting groove 28, and the magnetic induction magnet 92 is positioned opposite to the head position sensor 91.

[0109] The position monitoring of the nodding motion of the prism carrier 20 can be achieved through the cooperation of the sensing magnet 92 and the nodding position sensor 91. Furthermore, the sensing magnet mounting slot 28 is preferably connected to the oscillating shaft mounting slot 26, so that the sensing magnet 92 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. Of course, the other end of the oscillating shaft 62 is confined within the oscillating shaft mounting slot 26.

[0110] In one embodiment, reference is made to Figures 6 to 8 The head nodding position sensor 91 is located on the rear side of the head nodding coil 41 in the first direction.

[0111] In one embodiment, a zoom position sensor is disposed in the middle of the zoom coil 45. Since the zoom coil 45 and the zoom magnet 46 are arranged opposite each other, the zoom position sensor disposed in the middle of the zoom coil 45 is also arranged opposite to the zoom magnet 46. Through the cooperation of the zoom position sensor and the zoom magnet 46, the zoom position of the lens carrier 30 can be monitored.

[0112] A swaying position sensor is disposed in the middle of the swaying coil 42. Since the swaying coil 42 and the swaying magnet 44 are arranged opposite each other, the swaying position sensor disposed in the middle of the swaying coil 42 is also arranged opposite to the swaying magnet 44. Through the cooperation of the swaying position sensor and the swaying magnet 44, the swaying position of the prism carrier 20 can be monitored.

[0113] In one embodiment, reference is made to Figure 9 The base 10 contains a second base embedded metal 17, which is positioned opposite to and attracted to the induction magnet 92 and the nodding magnet 43. The induction magnet 92 and the nodding magnet 43 both generate an attractive force with the second base embedded metal 17 embedded in the base 10, making the structure between the prism carrier 20 and the base 10 more stable.

[0114] In one embodiment, the zoom coil 45, the head-nodding coil 41, the head-shaking coil 42, the head-nodding position sensor 91, the head-shaking position sensor, and the zoom position sensor are formed together with the base 10 by injection molding.

[0115] The first base has built-in metal 12, the second base has built-in metal 17, and the base has built-in wiring 11, which are made together with the base 10 by injection molding.

[0116] In practice, during the base processing, each coil and position sensor is first injection molded to form a one-time molding structure. Then, a second injection molding is performed to embed the base's internal metal and internal wiring, thus completing the base processing and molding.

[0117] In one embodiment, reference is made to Figure 1 The lens driving device also 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.

[0118] In one embodiment, one of the housing 50 and the base 10 is provided with a slot and the other is provided with a buckle, so that the housing 50 and the base 10 can be detachably connected by the slot and the buckle engaging.

[0119] like Figure 1 As shown, the outer casing 50 has a slot 51 on its side and the base 10 has a buckle 18 on its side. The outer casing 50 and the base 10 can be detachably connected by the slot 51 and the buckle 18 engaging.

[0120] In one embodiment, the outer surface of the buckle 18 is an inclined surface that slopes from the upper inner side to the lower outer side. When the buckle 18 is made with an inclined surface, the connection between the outer shell 50 and the base 10 can be achieved by directly pressing the outer shell 50 under the guidance of the inclined surface. The connection is simple, convenient and effortless.

[0121] In one embodiment, one of the housing 50 and the base 10 is provided with a positioning groove and the other is provided with a positioning protrusion. The positioning of the housing 50 and the base 10 is achieved by the positioning groove and the positioning protrusion being inserted into each other.

[0122] like Figure 1 As shown, the outer shell 50 has a positioning groove 52 on its side and the base 10 has a positioning protrusion 19 on its side. The positioning of the outer shell 50 and the base 10 is achieved by the insertion of the positioning groove 52 and the positioning protrusion 19.

[0123] 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, the lens driving device comprising a base, a lens carrier and a zoom driving mechanism, the zoom driving mechanism driving the lens carrier to move within the base along a first direction; Its features are, A ball groove is provided between the bottom end of the lens carrier and the bottom end of the base, and a ball is rotatably connected in the ball groove; 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. The ball bearing groove at the bottom of the lens carrier is the lens carrier ball bearing groove, and the length direction of the lens carrier ball bearing groove is the first direction. A zoom magnet mounting groove is provided on one side wall of the lens carrier. The bottom end of the zoom magnet mounting groove is connected to the middle part of the lens carrier ball bearing groove on the same side. The zoom magnet is installed in the zoom magnet mounting groove. The zoom magnet divides the lens carrier ball bearing groove into two independent areas, and the two independent areas are respectively provided with the ball bearing.

2. The lens driving device as described in claim 1, characterized in that, The lens carrier ball groove is disposed on both sides of the bottom end of the lens carrier. The lens carrier ball groove on the same side as the zoom magnet mounting groove extends from one end of the bottom end of the lens carrier along the first direction to the other end of the bottom end of the lens carrier. The lens carrier ball groove on the side away from the zoom magnet mounting groove is located in the middle of the bottom end of the lens carrier. And / or, an adsorption magnet is provided on the bottom end of the lens carrier away from the zoom magnet mounting groove, and a first base built-in metal is provided in the base, the first base built-in metal is arranged opposite to the adsorption magnet and they are attracted to each other. And / or, the base is provided with an internal and external light outlet, the light outlet is located at the front end of the lens carrier, the inner side of the light outlet is provided with a plate slot, the plate slot is used to insert a plate, the plate is provided with clearance holes, the clearance holes on different plates are of different sizes, and the size of the light outlet of the base is adjusted by changing the plate.

3. The lens driving device as described in claim 1, characterized in that, The lens carrier is provided with one or more anti-collision block mounting slots on the front and rear end faces in the first direction. Anti-collision blocks are installed in the anti-collision block mounting slots, and one end of the anti-collision block extends out of the anti-collision block mounting slot.

4. The lens driving device as described in claim 3, characterized in that, The ends of the anti-collision block have a pointed structure.

5. The lens driving device as described in claim 3, characterized in that, The anti-collision block is made of a flexible soft rubber material.

6. The lens driving device as claimed in claim 1, characterized in that, The lens driving device further includes a prism carrier and a prism driving mechanism, wherein the lens carrier and the prism carrier are disposed in the base at a front and rear position along a first direction. A cross axis is provided between the prism carrier and the base. The prism driving mechanism drives the prism carrier to rotate around a first direction and a second direction perpendicular to the first direction with the cross axis as the fulcrum. The cross axis includes a head-shaking axis extending along the first direction and a head-nodding axis extending along the second direction. 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 prism driving mechanism 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. 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. A swaying magnet mounting groove is provided on one side of the prism carrier, and the swaying magnet is installed in the swaying magnet mounting groove. A support platform mounting groove is provided on one side of the prism carrier near the middle and on the opposite side. 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 swaying magnet is located outside the second support platform. The spring limiting part extends into the position between the support platform mounting groove where the second support platform is located and the oscillating magnet mounting groove.

8. The lens driving device as described in claim 6, characterized in that, 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; And / or, the spring is provided with a plurality of spring fixing holes, and the bottom end of the prism carrier and / or the inner bottom end of the base is provided with a plurality of fixing posts. The fixing posts adopt a conical structure or a truncated conical structure, and the spring is connected to the prism carrier and / or the base by being inserted into the fixing posts through the spring fixing holes.

9. The lens driving device as described in claim 8, characterized in that, The spring support section adopts a U-shaped structure with the opening facing upwards.

10. The lens driving device as claimed in claim 1, characterized in that, The lens driving device further includes a prism carrier and a prism driving mechanism, wherein the lens carrier and the prism carrier are disposed in the base at a front and rear position along a first direction. The prism carrier has several anti-collision protrusions at its top and around its perimeter. The thickness of the anti-collision protrusions on the rear side of the prism carrier in the first direction is less than the thickness of the anti-collision protrusions at other locations.

11. The lens driving device as claimed in claim 7, characterized in that, The nodding coil and the shaking coil are powered by the built-in circuitry of the base. And / or, the bottom end of the prism carrier is provided with a nodding shaft mounting groove and a swaying shaft mounting groove, wherein the nodding shaft is installed in the nodding shaft mounting groove and the swaying shaft is installed in the swaying shaft mounting groove; the bottom end of the prism carrier is provided with a nodding magnet mounting groove, wherein the nodding magnet is installed in the nodding magnet mounting groove, and the nodding magnet mounting groove is located below the cross shaft mounting groove formed by the connection of the nodding shaft mounting groove and the swaying shaft mounting groove; And / or, a zoom position sensor is provided in the middle of the zoom coil, and a yaw position sensor is provided in the middle of the yaw coil.

12. The lens driving device as claimed in claim 11, characterized in that, The base is provided with a nodding position sensor, and the rear end of the prism carrier is provided with a sensing magnet mounting groove. The sensing magnet mounting groove is located at the rear end of the first direction of the yaw shaft mounting groove. A sensing magnet is installed in the sensing magnet mounting groove, and the sensing magnet is arranged opposite to the nodding position sensor.

13. The lens driving device as claimed in claim 12, characterized in that, The nodding position sensor is located on the rear side of the nodding coil in the first direction.

14. The lens driving device as claimed in claim 12, characterized in that, The base has a second base built-in metal, which is respectively positioned opposite to and attracted to the sensing magnet and the nodding magnet.

15. The lens driving device as claimed in claim 14, characterized in that, The zoom coil, the nodding coil, the swaying coil, the nodding position sensor, the swaying position sensor, and the zoom position sensor are manufactured together with the base by injection molding. The base has a first base built-in metal, and the first base built-in metal, the second base built-in metal, and the base built-in circuit are formed by injection molding.

16. The lens driving device according to any one of claims 6 to 15, characterized in that, The lens driving device also includes a housing, which is detachably connected to the base to form a receiving cavity, and the prism carrier, the lens carrier, the prism driving mechanism and the zoom driving mechanism are disposed in the receiving cavity.

17. The lens driving device as claimed in claim 16, characterized in that, One of the outer shell and the base is provided with a slot and the other is provided with a buckle, and the outer shell and the base are detachably connected by the slot and the buckle engaging.

18. The lens driving device as claimed in claim 17, characterized in that, The outer casing has a slot on its side, and the base has a buckle on its side. The outer surface of the buckle is an inclined surface that slopes from the inner side at the top to the outer side at the bottom.

19. The lens driving device as claimed in claim 16, characterized in that, One of the outer shell and the base is provided with a positioning groove and the other is provided with a positioning protrusion. The positioning of the outer shell and the base is achieved by the positioning groove and the positioning protrusion being inserted into each other.

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