Lens drive device

Abstract

The present invention belongs to the technical field of optical imaging equipment, and specifically relates to a lens driving device, including a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism; a prism transmitting plate is built-in at the rear side of the base, a nodding receiving plate is arranged on the side of the prism transmitting plate, a shaking head receiving plate is built-in at the side of the base, the prism transmitting plate is connected to the prism carrier capacitor IC, and the prism carrier capacitor IC, the nodding receiving plate and the shaking head receiving plate are all powered by the built-in circuit of the base; a prism carrier built-in metal is arranged in the prism carrier, and a prism carrier metal plate is arranged on the rear side and one side of the built-in metal of the prism carrier, the prism carrier metal plate on the rear side is arranged opposite to the prism transmitting plate and the nodding receiving plate, and the lens carrier metal plate on the side is arranged opposite to the shaking head receiving plate. The present invention does not need to power the two prism carrier metal plates located on the prism carrier, that is, no power-on structure needs to be arranged at the prism carrier, and the structural design is more concise.

Description

Technical Field

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

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

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

[0004] The lens part usually moves along the optical axis direction of the lens to achieve the purpose of zooming. In the prior art, in order to monitor the moving position of the lens part, a capacitor structure is generally formed by two metal plates that are relatively arranged and powered. When applied to a lens driving device, it is necessary to set a powered structure for the metal plate on the lens carrier, which inevitably increases the power supply layout and increases the structural complexity in the structural design. Summary of the invention

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

[0006] A lens driving device comprises a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism, wherein the lens carrier and the prism carrier are arranged in the base along a first direction, the zoom driving mechanism drives the lens carrier to move along the first direction, and the prism driving mechanism drives the prism carrier to move around the first direction and a second direction perpendicular to the first direction;

[0007] A prism transmitting plate is built into the rear side of the base, a nodding receiving plate is arranged on the side of the prism transmitting plate along a third direction perpendicular to the first direction, a shaking receiving plate is built into the side of the base, the prism transmitting plate is connected to a prism carrier capacitor IC arranged in the base, and the prism carrier capacitor IC, the nodding receiving plate and the shaking receiving plate are all powered by a base built-in circuit arranged in the base;

[0008] A prism carrier built-in metal is arranged in the prism carrier, and a prism carrier metal plate is arranged on the rear side and one side of the prism carrier built-in metal. The prism carrier metal plate on the rear side of the prism carrier built-in metal is arranged opposite to the prism emitting plate and the nodding receiving plate, and the prism carrier metal plate on the side of the prism carrier built-in metal is arranged opposite to the shaking head receiving plate.

[0009] Optionally, there are two nodding receiving plates, and the two nodding receiving plates are arranged on both sides of the prism emitting plate along the third direction;

[0010] There are two oscillating receiving plates, and the two oscillating receiving plates are arranged side by side along the first direction.

[0011] Optionally, the prism carrier includes a first prism carrier and a second prism carrier arranged at the lower end of the first prism carrier, the bottom end of the second prism carrier is provided with a shaking ball, the shaking ball abuts against the inner bottom end of the base, and the second prism carrier moves around the first direction with the shaking ball as a fulcrum, and a nodding ball is provided at the top end of the second prism carrier, the nodding ball abuts against the bottom end of the first prism carrier, and the first prism carrier moves around the second direction with the nodding ball as a fulcrum;

[0012] Among them, the prism carrier built-in metal is arranged in the first prism carrier, and the prism carrier built-in metal is the first prism carrier built-in metal.

[0013] Optionally, a shaking ball groove is provided between the bottom end of the second prism carrier and the base, and a movable ball is rollingly connected in the shaking ball groove.

[0014] Optionally, three shaking head ball grooves are arranged between the bottom end of the second prism carrier and the base, and the three shaking head ball grooves are distributed in a herringbone shape along the first direction. The shaking head ball is fixed in the middle shaking head ball groove, and the movable balls are rollingly connected in the shaking head ball grooves on both sides.

[0015] Optionally, a supporting groove is provided at the bottom end of the first prism carrier, a supporting protrusion is provided on the second prism carrier, a nodding ball is provided at the top end of the supporting protrusion, the supporting protrusion cooperates with the supporting groove, and the nodding ball abuts against the top groove wall of the supporting groove.

[0016] Optionally, two nodding balls are arranged at the top end of the second prism carrier along the second direction.

[0017] Optionally, the prism driving mechanism includes a nodding coil arranged on the inner rear side of the base, a shaking head coil arranged on the inner bottom end of the base, a nodding magnet arranged on the inner rear side of the first prism carrier, and a shaking head magnet arranged on the bottom end of the second prism carrier, the nodding coil and the nodding magnet are arranged opposite to each other, and the shaking head coil and the shaking head magnet are arranged opposite to each other.

[0018] Optionally, there are two nodding coils, and the two nodding coils are arranged on the inner rear side of the base along the second direction;

[0019] There are two groups of nodding magnets, and the two groups of nodding magnets are arranged on the rear side of the first prism carrier along the second direction. Each group of nodding magnets has one or several nodding magnets arranged side by side.

[0020] Optionally, there are two oscillating coils, and the two oscillating coils are arranged at the bottom end of the base along the second direction;

[0021] The oscillating magnets are in two groups, and the two groups of oscillating magnets are arranged at the bottom of the second prism carrier along the second direction. Each group of oscillating magnets has one or several oscillating magnets arranged side by side.

[0022] Optionally, a first prism carrier built-in metal is disposed in the first prism carrier, the first prism carrier built-in metal has a rear side surface, and the rear side surface of the first prism carrier built-in metal is arranged opposite to the nodding magnet and adsorbs to each other.

[0023] Optionally, a first prism carrier built-in metal is disposed in the first prism carrier, and a first prism carrier adsorption metal is disposed at the middle bottom end of the first prism carrier built-in metal;

[0024] A second prism carrier built-in metal is disposed in the second prism carrier, and an adsorption magnet mounting portion is disposed at the top of the middle portion of the second prism carrier built-in metal;

[0025] The second prism carrier is provided with a first prism carrier adsorption magnet, and the first prism carrier adsorption magnet is respectively arranged opposite to and adsorbed to the first prism carrier adsorption metal and is arranged opposite to and adsorbed to the adsorption magnet mounting portion.

[0026] Optionally, a second prism carrier built-in metal is disposed in the second prism carrier, and a bottom end of the second prism carrier built-in metal is disposed opposite to the shaking head magnet and is attracted to each other.

[0027] Optionally, a bottom adsorption iron sheet is provided in the base, and the bottom adsorption iron sheet is located below the shaking head coil. The bottom adsorption iron sheet and the shaking head magnet are arranged opposite to each other and adsorbed to each other.

[0028] Optionally, the zoom driving mechanism includes a zoom coil arranged on the inner side wall of the base and a zoom magnet arranged on the side wall of the lens carrier, and the zoom coil and the zoom magnet are arranged opposite to each other.

[0029] Optionally, a cover plate for fixing the lens is detachably provided on the top of the lens carrier.

[0030] Optionally, anti-collision parts are respectively provided at the front and rear ends of the lens carrier.

[0031] Optionally, a lens ball groove is provided between the bottom end of the lens carrier and the inner bottom end of the base, and a lens ball is rollingly connected in the lens ball groove.

[0032] Optionally, a lens carrier adsorption magnet is provided at the bottom end of the lens carrier, and a base built-in metal is provided in the base, and the base built-in metal and the lens carrier adsorption magnet are arranged opposite to each other and adsorbed to each other;

[0033] The bottom end of the built-in metal of the lens carrier is arranged opposite to the lens carrier adsorption magnet and adsorbs to each other.

[0034] Optionally, the built-in metal of the lens carrier has a side surface on a side away from the metal plate of the lens carrier, and the side surface of the built-in metal of the lens carrier is arranged opposite to the zoom magnet and is attracted to each other.

[0035] Optionally, the lens driving device further comprises a shell, which is detachably connected to the base and forms a hollow cavity, and the prism carrier, the lens carrier, the prism driving mechanism and the zoom driving mechanism are arranged in the hollow cavity.

[0036] Optionally, a downward depression is provided on the shell, and an upward protrusion is provided on the top of the prism carrier. After the shell and the base are detachably connected, the depression is located on the side of the protrusion to form a limiting structure between the shell and the base.

[0037] Optionally, the shell has recesses on both sides of the rear end, the recesses are arranged across the rear side and the side of the shell, the top rear side and both sides of the prism carrier have protrusions, and after the shell is detachably connected to the base, the recess is located between two adjacent protrusions.

[0038] Optionally, the front side surface of the recess is a first inclined surface, the rear side surfaces of the protrusions located on both sides of the prism carrier are second inclined surfaces, and the inclination angle of the first inclined surface of the recess is consistent with the inclination angle of the second inclined surface of the protrusion.

[0039] Beneficial effects: The present invention has at least one or more of the following advantages: The present invention arranges the prism carrier metal plate on the rear side relative to the prism transmitting plate and the nodding receiving plate, and the side prism carrier metal plate relative to the shaking receiving plate. The capacitance value between the prism transmitting plate and the nodding receiving plate, and the capacitance value between the prism transmitting plate and the shaking receiving plate can be monitored by the prism carrier capacitor IC. When the two prism carrier metal plates perform nodding and shaking movements with the prism carrier, the capacitance value between the prism transmitting plate and the nodding receiving plate will change, and the capacitance value between the prism transmitting plate and the shaking receiving plate will change. According to the change in capacitance value, the position of the prism carrier in the nodding direction and the shaking direction can be monitored, and the structure acts as a position sensor. Compared with the prior art, the present invention does not need to power the two prism carrier metal plates on the prism carrier, that is, no power-on structure needs to be set at the prism carrier, and the structural design is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A structural schematic diagram of the present invention;

[0041] Figure 2 for Figure 1 AA section view;

[0042] Figure 3 for Figure 1 BB cross-sectional view;

[0043] Figure 4 for Figure 1 CC section view;

[0044] Figure 5 for Figure 1 Exploded diagram of

[0045] Figure 6 for Figure 5 Further exploded diagram of;

[0046] Figure 7 A schematic diagram of the structure of the base of the present invention;

[0047] Figure 8 A schematic diagram of the structure of the prism carrier of the present invention;

[0048] Fig. 9 for Figure 8 Exploded diagram of

[0049] Fig.10 for Fig. 9 Schematic diagram from another angle;

[0050] Fig.11 A schematic diagram of the structure of the lens carrier of the present invention;

[0051] Fig.12 An exploded diagram showing the positional relationship of the internal structures of the present invention;

[0052] Fig.13 for Fig.12 Schematic diagram from another angle.

[0053] Fig.14 This is a positional relationship diagram between the lens carrier metal plate, the prism carrier metal plate and the base of the present invention. DETAILED DESCRIPTION

[0054] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0055] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0056] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0057] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0058] In the following description, the first direction is defined as the direction along the optical axis of the lens, the second direction is defined as the direction perpendicular to the first direction and parallel to the lower surface of the base, and the third direction is defined as the direction perpendicular to the first direction and the second direction, that is, the third direction is the direction of the plumb line when the base is normally placed, that is, a coordinate system is established with the third direction as the Z-axis and the first direction as the X-axis, and the second direction is the Y-axis.

[0059] Reference Figures 1 to 14The present embodiment provides a lens driving device, which includes a base 10, a prism carrier, a lens carrier 60, a prism driving mechanism and a zoom driving mechanism.

[0060] The prism carrier and the lens carrier 60 are arranged in the base 10 along the first direction. Specifically, a prism carrier accommodating cavity and a lens carrier accommodating cavity may be arranged in the base 10 along the first direction. The prism carrier is used to install the prism 91 and is arranged in the prism carrier accommodating cavity. The lens carrier 60 is used to install the lens 92 and is arranged in the lens carrier accommodating cavity.

[0061] The zoom drive mechanism drives the lens carrier 60 to move along the first direction to realize the zoom function, and the prism drive mechanism drives the prism carrier to move around the first direction and the second direction perpendicular to the first direction to realize the optical image stabilization function. The prism carrier drives the prism to nod and shake its head, and the prism can turn the direction of the light passing through. The prism carrier can move the prism to change the irradiation direction of the light. Among them, the nodding action refers to the action of the prism carrier rotating around the second direction, and the shaking action refers to the action of rotating around the first direction.

[0062] Reference Figure 3 , Figure 12 to Figure 14 , a lens emitting plate 81 and a lens receiving plate 82 are built into the side wall of the base 10, and the lens emitting plate 81 and the lens receiving plate 82 are arranged along a third direction perpendicular to the first direction, and the lens emitting plate 81 is connected to a lens carrier capacitor IC83 arranged in the base 10, and the lens carrier capacitor IC83 and the lens receiving plate 82 are powered by a base built-in circuit arranged in the base 10. The lens carrier capacitor IC83 can monitor the capacitance value between the lens emitting plate 81 and the lens receiving plate 82. A lens carrier built-in metal 64 is arranged in the lens carrier 60, and a lens carrier metal plate 84 is arranged on the side of the lens carrier built-in metal 64, and the lens carrier metal plate 84 moves as the lens carrier 60 moves along the first direction. The lens carrier metal plate 84 is arranged opposite to the lens emitting plate 81 and the lens receiving plate 82. The projection area directly between the lens carrier metal plate 84 and the lens emitting plate 81, and the projection area directly between the lens carrier metal plate 84 and the lens receiving plate 82 are changed as the lens carrier metal plate 84 moves.

[0063] The capacitance between the projection area of ​​the lens emitting plate 81 and the projection area of ​​the lens receiving plate 82 will change due to the jump bridge characteristics of the lens carrier metal plate 84. When a positive voltage signal is given to the lens emitting plate 81, a large amount of positive charge will be accumulated on the surface of the lens emitting plate 81, and the side of the lens carrier metal plate 84 corresponding to the lens emitting plate 81 will accumulate negative charge; since the lens carrier metal plate 84 has no external circuit, the charge will not be transferred, and since the charge of the lens carrier metal plate 84 itself is conserved, the positive charge will be accumulated on the other side, that is, the side close to the lens receiving plate 82; then the side of the lens receiving plate 82 will be affected by the positive charge of the lens carrier metal plate 84, and negative charge will be accumulated on the surface, thus completing the capacitance effect between the two plates.

[0064] Therefore, due to the existence of the lens carrier metal plate 84, the dielectric in the space between the lens emitting plate 81 and the lens receiving plate 82 occupied by the lens carrier metal plate 84 is equivalent to disappearing. The distance between the lens emitting plate 81 and the lens receiving plate 82 is equivalently shortened, so according to the capacitance calculation formula C=εS / 4πkd, where C is capacitance, ε is dielectric constant, k is electrostatic force constant, S is overlapping area of ​​the two plates, and d is vertical distance between the two plates, it can be known that due to the existence of the lens carrier metal plate 84, the distance d between the lens emitting plate 81 and the lens receiving plate 82 is equivalently shortened, so that the capacitance of part of the lens emitting plate 81 and part of the lens receiving plate 82 with the projection area on the lens carrier metal plate 84 is larger, so that when the lens carrier metal plate 84 moves with the lens carrier 60, the capacitance between the lens emitting plate 81 and the lens receiving plate 82 will show a linear change trend, so that the lens carrier capacitor IC83 can more easily determine the position of the lens carrier 60 according to the linearly changing capacitance between the lens emitting plate 81 and the lens receiving plate 82, and control the lens carrier 60 to move in the focusing direction, so that the lens carrier 60 can be moved to the target position, thereby improving the accuracy of the focusing closed-loop control.

[0065] In the present invention, when the lens carrier metal plate 84 moves with the lens carrier 60, the capacitance value between the lens transmitting plate 81 and the lens receiving plate 82 will change. The moving position of the lens carrier 60 can be monitored according to the change in the capacitance value. This structure plays the role of a position sensor.

[0066] In one embodiment, there are two lens receiving plates 82 , and the two lens receiving plates 82 are arranged side by side along the first direction and are located below the lens emitting plate 81 .

[0067] At this time, the length of the lens emitting plate 81 may be greater than or equal to the lengths of the two lens receiving plates 82. In the case where there is a gap between the two lens receiving plates 82, the length of the lens emitting plate 81 is greater than or equal to the sum of the lengths of the two lens receiving plates 82 and the gap. The length of the lens emitting plate 81 and the length of the lens receiving plate 82 are both the lengths along the first direction, the width of the lens emitting plate 81 and the width of the lens receiving plate 82 are the same, and the two lens receiving plates 82 have the same shape and size.

[0068] At this time, as the lens carrier 60 moves along the first direction, the area of ​​the projection area between the lens carrier metal plate 84 and one lens receiving plate 82 gradually decreases, and the area of ​​the projection area between the lens carrier metal plate 84 and the other lens receiving plate 82 gradually increases, while the area of ​​the projection area between the lens carrier metal plate 84 and the lens transmitting plate 81 remains unchanged during the movement. Therefore, as the lens carrier metal plate 84 moves along the first direction as the lens carrier 60 moves, the reference capacitance between the lens transmitting plate 81 and one lens receiving plate 82 gradually increases, and the reference capacitance between the lens transmitting plate 81 and the other lens receiving plate 82 gradually decreases. In this embodiment, two lens receiving plates 82 are provided. The capacitance between the lens transmitting plate 81 and the two lens receiving plates 82 changes linearly, thereby enhancing the robustness of the capacitance signal and further improving the accuracy of the focus closed-loop control. At the same time, in this embodiment, the lens carrier 60 is controlled to move to the target position by the two reference capacitances formed, which is more convenient to offset the influence of environmental factors on the acquired capacitance signal, so that the position of the lens carrier 60 movement is controlled more accurately, thereby improving the accuracy of the focus closed-loop control.

[0069] In one embodiment, referring to Figure 4 , Figure 12 to Figure 14 A prism transmitting plate 85 is built into the rear side of the base 10, a nodding receiving plate 86 is arranged on the side of the prism transmitting plate 85 along the third direction, a shaking receiving plate 87 is built into the side of the base 10, the prism transmitting plate 85 is connected to the prism carrier capacitor IC88 arranged in the base 10, and the prism carrier capacitor IC88, the nodding receiving plate 86, and the shaking receiving plate 87 are all powered by the base built-in circuit arranged in the base 10. A prism carrier built-in metal is arranged in the prism carrier, and a prism carrier metal plate 89 is arranged on the rear side and one side of the built-in metal of the prism carrier. The prism carrier metal plate 89 on the rear side of the built-in metal of the prism carrier is arranged opposite to the prism transmitting plate 85 and the nodding receiving plate 86, and the prism carrier metal plate 89 on the side of the built-in metal of the prism carrier is arranged opposite to the shaking receiving plate 87.

[0070] Similarly, the prism transmitting plate 85, the nodding receiving plate 86, and the prism carrier metal plate 89 on the rear side of the built-in metal of the prism carrier are combined to form a capacitive monitoring structure that is the same as the lens carrier 60, thereby realizing position monitoring of the prism carrier and the prism in the nodding direction; the prism transmitting plate 85, the shaking head receiving plate 87, and the prism carrier metal plate 89 on the side of the built-in metal of the prism carrier are also combined to form the above-mentioned capacitive monitoring structure, thereby realizing position monitoring of the prism carrier and the prism in the shaking head direction.

[0071] In one embodiment, there are two nodding receiving plates 86 , and the two nodding receiving plates 86 are respectively arranged on the upper and lower sides of the prism emitting plate 85 .

[0072] There are two oscillating receiving plates 87 , and the two oscillating receiving plates 87 are arranged side by side along the first direction.

[0073] In one embodiment, the lens carrier capacitor IC83 and the prism carrier capacitor IC88 are both existing capacitor IC chips.

[0074] For example, a camera motor driver chip of the prior art is used. The capacitor IC chip can be a CH9914N / 9914P / 9914A series chip, and the capacitor IC chip preferably uses a CHM9500 model chip.

[0075] In one embodiment, the prism carrier includes a first prism carrier 20 and a second prism carrier 30, and the second prism carrier 30 is disposed at the lower end of the first prism carrier 20. The prism 91 is mounted on the first prism carrier 20.

[0076] Reference Figure 8 and Fig.10 The second prism carrier 30 is provided with a swaying ball 41 at the bottom end thereof, and the swaying ball 41 abuts against the inner bottom end of the base 10, and the second prism carrier 30 moves around the first direction with the swaying ball 41 as a fulcrum. Fig. 9 A nodding ball 42 is disposed at the top of the second prism carrier 30 , and the nodding ball 42 abuts against the bottom of the first prism carrier 20 . The first prism carrier 20 moves around the second direction with the nodding ball 42 as a fulcrum.

[0077] The prism carrier built-in metal is disposed in the first prism carrier 20 , and the prism carrier built-in metal is the first prism carrier built-in metal 22 .

[0078] The present invention provides rolling support through the shaking head ball 41 and the nodding ball 42, so that the nodding and shaking head movements are light and smooth, reducing the activity resistance of the prism carrier, so that the prism carrier can achieve stable nodding and shaking head movements.

[0079] In one embodiment, referring to Figure 7 and Figure 8A shaking ball groove is provided at the bottom end of the second prism carrier 30 and the bottom end of the base 10, and a movable ball 43 is rollingly connected in the shaking ball groove.

[0080] The movable ball 43 is not fixedly connected to the base 10 or the second prism carrier 30, and can roll freely in the oscillating ball groove. When the second prism carrier 30 performs an oscillating motion, the movable ball 43 rolls in the oscillating ball groove.

[0081] In one embodiment, referring to Figure 7 and Figure 8 Three shaking head ball grooves are respectively arranged at the bottom end of the second prism carrier 30 and the bottom end of the base 10. The three shaking head ball grooves are distributed in a herringbone shape along the first direction. A shaking head ball 41 is fixed in the shaking head ball groove at the front end of the middle part, and movable balls 43 are rollingly connected in the shaking head ball grooves on both sides of the rear end.

[0082] The oscillating ball 41 is fixed in the oscillating ball groove at the bottom end of the second prism carrier 30 , and the bottom end of the oscillating ball 41 abuts (contacts) with the oscillating ball groove at the bottom end of the base 10 .

[0083] In one embodiment, referring to Fig. 9 and Fig.10 A supporting groove 21 is provided at the bottom end of the first prism carrier 20, a supporting protrusion 31 is provided on the second prism carrier 30, a nodding ball 42 is provided at the top of the supporting protrusion 31, the supporting protrusion 31 is inserted into the supporting groove 21, and the nodding ball 42 abuts against the top groove wall of the supporting groove 21.

[0084] In one embodiment, referring to Fig. 9 Two nodding balls 42 are arranged at the top of the second prism carrier 30 along the second direction.

[0085] Specifically, the two nodding balls 42 are preferably located on the left and right sides of the top end of the second prism carrier 30 .

[0086] In one embodiment, referring to Figure 7 , Figure 8 and Fig.10 The prism driving mechanism includes a nodding coil 51 arranged at the rear side of the base 10, a shaking coil 52 arranged at the bottom end of the base 10, a nodding magnet 53 arranged in the nodding magnet mounting groove 25 at the rear side of the first prism carrier 20, and a shaking magnet 54 arranged at the bottom end of the second prism carrier 30. The nodding coil 51 and the nodding magnet 53 are arranged opposite to each other and drive the first prism carrier 20 to nod under the cooperation of the two. The shaking coil 52 and the shaking magnet 54 are arranged opposite to each other and drive the second prism carrier 30 and the first prism carrier 20 to shake under the cooperation of the two.

[0087] The nodding coil 51 and the shaking coil 52 are both powered by a built-in circuit in the base 10 .

[0088] In one embodiment, referring to Figure 7 There are two nodding coils 51, and the two nodding coils 51 are arranged on the inner rear side of the base 10 along the second direction.

[0089] Reference Figure 8 There are two groups of nodding magnets 53, and the two groups of nodding magnets 53 are arranged on the rear side of the first prism carrier 20 along the second direction. Each group of nodding magnets 53 has one or several nodding magnets 53 arranged side by side.

[0090] When each group has a plurality of nodding magnets 53, the plurality of nodding magnets 53 may be arranged side by side along the second direction, or may be arranged side by side as shown in FIG. Figure 8 As shown, they are arranged side by side along the third direction.

[0091] In one embodiment, referring to Figure 7 There are two oscillating coils 52 , and the two oscillating coils 52 are arranged at the bottom end of the base 10 along the second direction.

[0092] Reference Figure 8 and Fig.10 There are two groups of shaking head magnets 54, and the two groups of shaking head magnets 54 are arranged at the bottom end of the second prism carrier 30 along the second direction. Each group of shaking head magnets 54 has one or several shaking head magnets 54 arranged side by side.

[0093] When each group has a plurality of oscillating magnets 54, the plurality of oscillating magnets 54 may be arranged side by side along the second direction, or may be arranged as follows: Figure 8 As shown, they are arranged side by side along a first direction.

[0094] In one embodiment, referring to Fig.12 and Fig.13 A first prism carrier built-in metal 22 is disposed in the first prism carrier 20. The first prism carrier built-in metal 22 has a rear side surface. The rear side surface of the first prism carrier built-in metal 22 is arranged opposite to the nodding magnet 53 and adsorbed to each other to improve the connection stability of the nodding magnet 53.

[0095] In one embodiment, referring to Fig.12 and Fig.13 A first prism carrier built-in metal 22 is disposed in the first prism carrier 20 , and a first prism carrier adsorption metal 23 is disposed at the middle bottom end of the first prism carrier built-in metal 22 .

[0096] A second prism carrier built-in metal 32 is disposed in the second prism carrier 30 , and an adsorption magnet mounting portion 33 is disposed at the top of the middle portion of the second prism carrier built-in metal 32 .

[0097] A first prism carrier adsorption magnet 34 is arranged on the second prism carrier 30. The first prism carrier adsorption magnet 34 and the first prism carrier adsorption metal 23 are arranged opposite to each other and adsorbed to each other. The first prism carrier adsorption magnet 34 and the adsorption magnet mounting portion 33 are arranged opposite to each other and adsorbed to each other to improve the connection stability between the first prism carrier 20 and the second prism carrier 30.

[0098] In one embodiment, referring to Fig.12 and Fig.13 A second prism carrier built-in metal 32 is disposed in the second prism carrier 30 , and the bottom end of the second prism carrier built-in metal 32 is disposed opposite to the shaking head magnet 54 and adsorbed to each other to improve the connection stability of the shaking head magnet 54 .

[0099] In one embodiment, a bottom adsorption iron sheet is disposed in the base 10 and is located below the shaking head coil 52 . The bottom adsorption iron sheet and the shaking head magnet 54 are disposed opposite to each other and adsorbed to each other to improve the connection stability between the second prism carrier 30 and the base 10 .

[0100] In one embodiment, referring to Figure 6 and Fig.12 The zoom driving mechanism includes a zoom coil 55 arranged on the inner wall of the base 10 and a zoom magnet 56 arranged on the side wall of the lens carrier 60. The zoom coil 55 and the zoom magnet 56 are arranged opposite to each other, and the two cooperate to generate a driving force to enable the lens carrier 60 to perform a zoom movement action.

[0101] The zoom coil 55 is powered by a built-in circuit in the base 10 .

[0102] In one embodiment, referring to Figure 5 , Figure 6 and Fig.11 A cover plate 61 is detachably provided on the top of the lens carrier 60 , and the cover plate 61 is used to fix the lens 92 .

[0103] In one embodiment, referring to Figure 6 and Fig.11 Anti-collision parts 62 are respectively provided at the front and rear ends of the lens carrier 60 to avoid collision with the base 10 or the rear side of the lens carrier 60.

[0104] The anti-collision part 62 is made of elastic material, such as rubber, plastic or silicone etc. Preferably, the anti-collision part 62 is made of soft rubber.

[0105] In one embodiment, referring to Figure 7 and Fig.11 A lens ball groove is provided between the bottom end of the lens carrier 60 and the bottom end of the base 10, and a lens ball 44 is rollingly connected in the lens ball groove to reduce the friction force when the lens carrier 60 moves.

[0106] Specifically, longer lens ball grooves 66 may be provided on the left and right sides of the bottom end of the lens carrier 60, respectively; a shorter lens ball groove and a lens ball 44 may be provided on one side of the bottom end of the base 10, and two shorter lens ball grooves and lens balls 44 may be provided on the other side of the bottom end of the base 10, respectively; the length directions of the lens ball grooves are all in the first direction, and each lens ball 44 may roll freely in the upper and lower lens ball grooves.

[0107] In one embodiment, referring to Fig.12 and Fig.13 The bottom of the lens carrier 60 is provided with a lens carrier adsorption magnet 63, and the base 10 is provided with a base built-in metal, which is arranged opposite to the lens carrier adsorption magnet 63 and adsorbed to each other. The lens carrier 60 is provided with a lens carrier built-in metal 64, and the bottom of the lens carrier built-in metal 64 is arranged opposite to the lens carrier adsorption magnet 63 and adsorbed to each other, making the structure between the lens carrier 60 and the base 10 more stable.

[0108] Specifically, refer to Fig.11 A magnet adsorption installation groove 65 may be provided at the bottom end of the lens carrier 60 , and the lens carrier magnet adsorption 63 may be installed in the magnet adsorption installation groove 65 .

[0109] In one embodiment, referring to Fig.12 and Fig.13 A lens carrier built-in metal 64 is provided in the lens carrier 60. The lens carrier built-in metal 64 has a side surface on the side away from the lens carrier metal plate 84. The side surface of the lens carrier built-in metal 64 is arranged opposite to the zoom magnet 56 and adsorbed to each other to improve the connection stability of the zoom magnet 56.

[0110] In one embodiment, referring to Figure 1 and Figure 5 The lens driving device also includes a shell 70, which is detachably connected to the base 10 and forms a hollow cavity. The prism carrier, the lens carrier 60, the prism driving mechanism and the zoom driving mechanism are arranged in the hollow cavity.

[0111] In one embodiment, referring to Figure 1 and Figure 5 The housing 70 is provided with a downward depression 71 , which is equivalent to a downward protrusion relative to the top surface inside the housing 70 .

[0112] Reference Figure 5 and Fig. 9 The top of the first prism carrier 20 is provided with an upward protrusion 24 .

[0113] After the housing 70 and the base 10 are detachably connected, the recess 71 is located on the side of the protrusion 24, and there is a preset small gap between the two, and the two cooperate with each other to form a limit structure between the housing 70 and the base 10. The gap between the two can be determined according to the actual anti-shake floating requirements of the prism carrier, so as not to hinder the normal nodding and shaking movements of the prism carrier.

[0114] Normally, when the prism carrier is nodding or shaking its head, the top of the first prism carrier 20 will not touch the outer shell 70. However, in extreme cases, such as when a terminal equipped with a lens driving device falls from a high place, the prism carrier may move a large amount and the adsorption parts may detach. At this time, the top of the first prism carrier 20 may touch the outer shell 70.

[0115] If the above-mentioned recess 71 and protrusion 24 are not designed, the first prism carrier 20 may collide with the outer shell 70 at the front end, the rear end, or the side. This collision is uncontrollable, and the point where the collision force is transmitted is also uncontrollable, which will cause the prism carrier to be unable to return to its original position after the collision, resulting in the problem that the anti-shake operation cannot be performed.

[0116] In this embodiment, through the cooperation of the above-mentioned recess 71 and protrusion 24, the first prism carrier 20 can only be restricted to shaking within a smaller range, and the collision contact between the prism carrier and the outer shell 70 can only be restricted between the recess 71 and the protrusion 24, ultimately achieving the purpose of controllable contact surface and collision force transfer point.

[0117] In one embodiment, referring to Figure 1 and Figure 5 The outer shell 70 has recesses 71 on both sides of the rear end, and the recesses 71 are arranged across the rear side and the side of the outer shell 70. The top rear side and both sides of the prism carrier have protrusions 24. After the outer shell 70 and the base 10 are detachably connected, each recess 71 is located between two adjacent protrusions 24.

[0118] In one embodiment, referring to Figure 5 The front side of the recess 71 is a first inclined surface 71a. Fig. 9 The rear side surfaces of the protrusions 24 located on both sides of the prism carrier are second inclined surfaces 24 a , and the inclination angle of the first inclined surface 71 a of the recess 71 is consistent with the inclination angle of the second inclined surface 24 a of the protrusion 24 .

[0119] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A lens driving device, comprising a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism, wherein the lens carrier and the prism carrier are arranged in the base along a first direction, the zoom driving mechanism drives the lens carrier to move along the first direction, and the prism driving mechanism drives the prism carrier to rotate around the first direction and a second direction perpendicular to the first direction; It is characterized in that A prism transmitting plate is built into the rear side of the base, and a nodding receiving plate is arranged on the side of the prism transmitting plate along a third direction perpendicular to the first direction, and there are two nodding receiving plates, which are arranged on both sides of the prism transmitting plate along the third direction; a shaking head receiving plate is built into the side of the base, and there are two shaking head receiving plates, which are arranged side by side along the first direction; the prism transmitting plate is connected to a prism carrier capacitor IC arranged in the base, and the prism carrier capacitor IC, the nodding receiving plate, and the shaking head receiving plate are all powered by a base built-in circuit arranged in the base; The prism carrier is provided with a prism carrier built-in metal, and a prism carrier metal plate is provided on the rear side and one side of the prism carrier built-in metal. The prism carrier metal plate on the rear side of the prism carrier built-in metal is arranged opposite to the prism emitting plate and the nodding receiving plate, and the prism carrier metal plate on the side of the prism carrier built-in metal is arranged opposite to the shaking receiving plate. The prism transmitting plate, the nodding receiving plate, and the prism carrier metal plate on the rear side of the built-in metal of the prism carrier form a capacitive monitoring structure to monitor the position of the prism carrier and the prism in the nodding direction; The prism transmitting plate, the shaking receiving plate, and the prism carrier metal plate on the metal side of the prism carrier form a capacitive monitoring structure to monitor the position of the prism carrier and the prism in the shaking direction; When the two prism carrier metal plates nod and shake their heads along with the prism carrier, the capacitance value between the prism transmitting plate and the nodding receiving plate will change, as will the capacitance value between the prism transmitting plate and the shaking receiving plate. The capacitance value between the prism transmitting plate and the nodding receiving plate, as well as the capacitance value between the prism transmitting plate and the shaking receiving plate, are monitored by the prism carrier capacitance IC, and the position of the prism carrier in the nodding direction and the shaking direction is monitored based on the capacitance value changes.

2. The lens driving device according to claim 1, wherein: The prism carrier comprises a first prism carrier and a second prism carrier arranged at the lower end of the first prism carrier, a shaking ball is arranged at the bottom end of the second prism carrier, the shaking ball abuts against the inner bottom end of the base, and the second prism carrier rotates around the first direction with the shaking ball as a fulcrum, and a nodding ball is arranged at the top end of the second prism carrier, the nodding ball abuts against the bottom end of the first prism carrier, and the first prism carrier rotates around the second direction with the nodding ball as a fulcrum; Among them, the prism carrier built-in metal is arranged in the first prism carrier, and the prism carrier built-in metal is the first prism carrier built-in metal.

3. The lens driving device according to claim 2, wherein: An oscillating ball groove is provided between the bottom end of the second prism carrier and the base, and a movable ball is rollingly connected in the oscillating ball groove.

4. The lens driving device according to claim 3, characterized in that: Three shaking head ball grooves are arranged between the bottom end of the second prism carrier and the base, and the three shaking head ball grooves are distributed in a herringbone shape along the first direction. The shaking head ball is fixed in the middle shaking head ball groove, and the movable balls are rollingly connected in the shaking head ball grooves on both sides.

5. The lens driving device according to claim 2, wherein: A supporting groove is arranged at the bottom end of the first prism carrier, a supporting protrusion is arranged on the second prism carrier, a nodding ball is arranged at the top end of the supporting protrusion, the supporting protrusion cooperates with the supporting groove, and the nodding ball abuts against the top groove wall of the supporting groove.

6. The lens driving device according to claim 5, characterized in that: Two nodding balls are arranged at the top end of the second prism carrier along the second direction.

7. The lens driving device according to claim 2, wherein: The prism driving mechanism includes a nodding coil arranged on the rear side of the base, a shaking head coil arranged on the bottom end of the base, a nodding magnet arranged on the rear side of the first prism carrier, and a shaking head magnet arranged on the bottom end of the second prism carrier. The nodding coil is arranged opposite to the nodding magnet, and the shaking head coil is arranged opposite to the shaking head magnet.

8. The lens driving device according to claim 7, wherein: A first prism carrier built-in metal is disposed in the first prism carrier, the first prism carrier built-in metal has a rear side surface, and the rear side surface of the first prism carrier built-in metal is disposed opposite to the nodding magnet and is attracted to each other; And / or, a second prism carrier built-in metal is disposed in the second prism carrier, and the bottom end of the second prism carrier built-in metal is disposed opposite to the shaking magnet and is attracted to each other; And / or, a bottom adsorption iron sheet is arranged in the base, the bottom adsorption iron sheet is located below the shaking head coil, and the bottom adsorption iron sheet and the shaking head magnet are arranged opposite to each other and adsorbed to each other.

9. The lens driving device according to claim 2, wherein: A first prism carrier built-in metal is disposed in the first prism carrier, and a first prism carrier adsorption metal is disposed at the middle bottom end of the first prism carrier built-in metal; A second prism carrier built-in metal is disposed in the second prism carrier, and an adsorption magnet mounting portion is disposed at the top of the middle portion of the second prism carrier built-in metal; The second prism carrier is provided with a first prism carrier adsorption magnet, and the first prism carrier adsorption magnet is respectively arranged opposite to and adsorbed to the first prism carrier adsorption metal and is arranged opposite to and adsorbed to the adsorption magnet mounting portion.

10. The lens driving device according to claim 1, wherein: The zoom driving mechanism comprises a zoom coil arranged on the inner side wall of the base and a zoom magnet arranged on the side wall of the lens carrier, wherein the zoom coil and the zoom magnet are arranged opposite to each other; And / or, a cover plate for fixing the lens is detachably provided on the top of the lens carrier; And / or, the lens carrier is provided with anti-collision parts at both the front and rear ends; And / or, a lens ball groove is provided between the bottom end of the lens carrier and the inner bottom end of the base, and a lens ball is rollingly connected in the lens ball groove; And / or, a lens carrier adsorption magnet is arranged at the bottom end of the lens carrier, a base built-in metal is arranged in the base, the base built-in metal and the lens carrier adsorption magnet are arranged opposite to each other and adsorbed to each other; a lens carrier built-in metal is arranged in the lens carrier, and the bottom end of the lens carrier built-in metal and the lens carrier adsorption magnet are arranged opposite to each other and adsorbed to each other.

11. The lens driving device according to claim 10, wherein: A lens carrier metal plate is arranged on the side of the built-in metal of the lens carrier, and a side of the built-in metal of the lens carrier away from the lens carrier metal plate has a side surface, and the side surface of the built-in metal of the lens carrier is arranged opposite to the zoom magnet and is attracted to each other.

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