Lens drive device

Abstract

The present invention belongs to the technical field of optical imaging equipment, and specifically relates to a lens drive device, comprising a base, a prism carrier, a lens carrier, a prism drive mechanism, and a zoom drive mechanism. The lens carrier and the prism carrier are arranged in a first direction within the base; a lens emitting plate and a lens receiving plate are built into the sidewalls of the base, and the lens emitting plate and the lens receiving plate are arranged in a third direction. The lens emitting plate is connected to a lens carrier capacitor IC, and the lens carrier capacitor IC and the lens receiving plate are both powered by a base-built circuit disposed within the base; a lens carrier built-in metal is disposed within the lens carrier, and a lens carrier metal plate is disposed on the side of the lens carrier built-in metal, and the lens carrier metal plate is disposed opposite the lens emitting plate and the lens receiving plate. Compared to the prior art, the present invention does not require powering the lens carrier metal plate located on the lens carrier, i.e., no power supply structure is required at the lens carrier, resulting in a simpler structural design.

Description

Technical Field

[0001] The present 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 smartphones or digital cameras) now have the function of taking photos or recording videos. These electronic devices are becoming more and more common, and are developing in the direction of convenient and lightweight designs to provide users with more choices.

[0003] Lens drive devices are used in lightweight designs because they significantly reduce the thickness and weight of the device. The lens drive device typically consists of two parts: a lens and a prism. The prism is located at the rear end, and an imaging chip is located at the front end of the lens. Light is reflected by the prism, redirecting it to the lens, where it is then zoomed and then transferred to the imaging chip.

[0004] The lens portion usually moves along the optical axis of the lens to achieve the purpose of zooming. In the prior art, in order to monitor the moving position of the lens portion, a capacitor structure is generally formed by two metal plates arranged opposite to each other and powered. When applied to a lens driving device, it is necessary to set a powered structure on the metal plate on the lens carrier, which inevitably increases the power supply layout and 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 lens emitting plate and a lens receiving plate are built into the side wall of the base, and the lens emitting plate and the lens receiving plate are arranged along a third direction perpendicular to the first direction. The lens emitting plate is connected to a lens carrier capacitor IC provided in the base, and the lens carrier capacitor IC and the lens receiving plate are both powered by a base built-in circuit provided in the base;

[0008] A lens carrier built-in metal is provided in the lens carrier, a lens carrier metal plate is provided on the side of the lens carrier built-in metal, and the lens carrier metal plate is arranged opposite to the lens emitting plate and the lens receiving plate.

[0009] Optionally, there are two lens receiving plates, which are arranged side by side along the first direction and located below the lens emitting plate.

[0010] 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.

[0011] Optionally, a cover plate for fixing the lens is detachably provided on the top of the lens carrier.

[0012] Optionally, anti-collision parts are respectively provided at the front and rear ends of the lens carrier.

[0013] 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.

[0014] 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;

[0015] The bottom end of the built-in metal of the lens carrier and the lens carrier adsorption magnet are arranged opposite to each other and adsorbed to each other.

[0016] Optionally, the built-in metal of the lens carrier has a side surface on a side away from the lens carrier metal plate, 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.

[0017] Optionally, a prism transmitting plate is built into the rear side of the base, a nodding receiving plate is provided 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 provided 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 provided in the base;

[0018] A prism carrier built-in metal is provided in the prism carrier, 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 head receiving plate.

[0019] 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;

[0020] There are two oscillating receiving plates, and the two oscillating receiving plates are arranged side by side along the first direction.

[0021] 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 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 the top end of the second prism carrier is provided with a nodding ball, the nodding ball abuts 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;

[0022] 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.

[0023] 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.

[0024] Optionally, three shaking head ball grooves are provided 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 shaking head ball groove in the middle, and the movable balls are rollingly connected in the shaking head ball grooves on both sides.

[0025] 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, the top of the supporting protrusion is provided with the nodding ball, the supporting protrusion cooperates with the supporting groove, and the nodding ball abuts against the top groove wall of the supporting groove.

[0026] Optionally, two nodding balls are provided at the top end of the second prism carrier along the second direction.

[0027] Optionally, the prism driving mechanism includes a nodding coil arranged on the rear side of the base, a shaking head coil arranged at 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 at 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.

[0028] 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;

[0029] There are two groups of nodding magnets, which are arranged at 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.

[0030] Optionally, there are two oscillating coils, and the two oscillating coils are arranged at the bottom end of the base along the second direction;

[0031] There are two groups of shaking head magnets, and the two groups of shaking head magnets are arranged at the bottom of the second prism carrier along the second direction. Each group of shaking head magnets has one or several shaking head magnets arranged side by side.

[0032] Optionally, a first prism carrier built-in metal is provided 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 is attracted to each other.

[0033] Optionally, a first prism carrier built-in metal is provided in the first prism carrier, and a first prism carrier adsorption metal is provided at the bottom middle portion of the first prism carrier built-in metal;

[0034] A second prism carrier built-in metal is provided in the second prism carrier, and an adsorption magnet mounting portion is provided at the top of the middle portion of the second prism carrier built-in metal;

[0035] 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 the first prism carrier adsorption metal and adsorbed to each other, and is respectively arranged opposite to the adsorption magnet mounting portion and adsorbed to each other.

[0036] Optionally, a second prism carrier built-in metal is provided in the second prism carrier, and the bottom end of the second prism carrier built-in metal is arranged opposite to the oscillating magnet and is attracted to each other.

[0037] Optionally, a bottom adsorption iron sheet is provided in the base, and the bottom adsorption iron sheet is located below the oscillating coil. The bottom adsorption iron sheet and the oscillating magnet are arranged opposite to each other and adsorbed to each other.

[0038] Optionally, the lens driving device further includes 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.

[0039] 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.

[0040] Optionally, the shell has recesses on both sides of the rear end, the recesses spanning the rear side and side of the shell, and the top rear side and both sides of the prism carrier have protrusions respectively. After the shell and the base are detachably connected, the recess is located between two adjacent protrusions.

[0041] 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.

[0042] Beneficial Effects: The present invention has at least one or more of the following advantages: The lens carrier metal plate is arranged relative to the lens emitting plate and the lens receiving plate, and the lens carrier capacitor IC can monitor the capacitance value between the lens emitting plate and the lens receiving plate. When the lens carrier metal plate moves with the lens carrier, the capacitance value between the lens emitting plate and the lens receiving plate changes. The movement position of the lens carrier can be monitored based on the change in capacitance value, thus functioning as a position sensor. Compared with the prior art, the present invention does not require powering the lens carrier metal plate located on the lens carrier, i.e., no power supply structure is required at the lens carrier, resulting in a simpler structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A structural schematic diagram of the present invention;

[0044] Figure 2 for Figure 1 AA section view;

[0045] Figure 3 for Figure 1 BB cross-sectional view;

[0046] Figure 4 for Figure 1 CC cross-sectional view;

[0047] Figure 5 for Figure 1 Exploded diagram;

[0048] Figure 6 for Figure 5 Further exploded diagram of

[0049] Figure 7 A structural schematic diagram of the base of the present invention;

[0050] Figure 8 A schematic structural diagram of a prism carrier of the present invention;

[0051] Figure 9 for Figure 8 Exploded diagram;

[0052] Figure 10 for Figure 9 Schematic diagram from another angle;

[0053] Figure 11 Schematic diagram of a structure of the lens carrier of the present invention;

[0054] Figure 12 An exploded view of the positional relationship of the internal structures of the present invention;

[0055] Figure 13 for Figure 12 Schematic diagram from another angle.

[0056] Figure 14 This is a diagram showing the positional relationship between the lens carrier metal plate, the prism carrier metal plate, and the base of the present invention. DETAILED DESCRIPTION

[0057] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, 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.

[0058] In the following description, for the purpose of illustrating the various disclosed embodiments, certain specific details are set forth in order 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 this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0059] Reference throughout this specification to "one embodiment" or "an embodiment" means 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 this 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.

[0060] 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 words such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and should not be understood as restrictive terms.

[0061] 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 and second directions. That is, the third direction is the direction of the plumb line when the base is normally placed. In other words, 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.

[0062] Reference Figures 1 to 14 This 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.

[0063] 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 provided 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, and the lens carrier 60 is used to install the lens 92 and is arranged in the lens carrier accommodating cavity.

[0064] The zoom drive mechanism drives the lens carrier 60 in a first direction to achieve zooming, while the prism drive mechanism drives the prism carrier in a first direction and a second direction perpendicular to the first direction to achieve optical image stabilization. The prism carrier drives the prism to perform nodding and shaking movements, redirecting the light passing through it. The prism carrier can move the prism, thereby changing the direction of light. The nodding movement refers to the prism carrier rotating in the second direction, while the shaking movement refers to the prism carrier rotating in the first direction.

[0065] Reference Figure 3 、 Figures 12 to 14 A lens emitting plate 81 and a lens receiving plate 82 are built into the sidewalls of the base 10. These plates are arranged along a third direction perpendicular to the first direction. The lens emitting plate 81 is connected to a lens carrier capacitor IC 83 located within the base 10. Both the lens carrier capacitor IC 83 and the lens receiving plate 82 are powered by circuitry built into the base 10. The lens carrier capacitor IC 83 can monitor the capacitance between the lens emitting plate 81 and the lens receiving plate 82. A lens carrier built-in metal element 64 is located within the lens carrier 60. A lens carrier metal plate 84 is positioned on the side of the built-in metal element 64. The lens carrier metal plate 84 moves as the lens carrier 60 moves in the first direction. The lens carrier metal plate 84 is positioned opposite the lens emitting plate 81 and the lens receiving plate 82. The projection areas directly between the lens carrier metal plate 84 and the lens emitting plate 81, and the projection areas directly between the lens carrier metal plate 84 and the lens receiving plate 82, both change as the lens carrier metal plate 84 moves.

[0066] The capacitance between the projected areas of the lens emitting plate 81 and the lens receiving plate 82 varies due to the jump-bridge characteristics of the lens carrier metal plate 84. When a positive voltage signal is applied to the lens emitting plate 81, a large amount of positive charge accumulates on its surface, while the surface of the lens carrier metal plate 84, which faces the lens emitting plate 81, accumulates negative charge. Since the lens carrier metal plate 84 lacks an external circuit, the charge does not transfer. Furthermore, because the lens carrier metal plate 84 inherently conserves charge, positive charge accumulates on the other side, the side closest to the lens receiving plate 82. The positive charge of the lens carrier metal plate 84 influences the surface of the lens receiving plate 82, causing negative charge to accumulate on its surface, thus completing the capacitive effect between the two plates.

[0067] 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. Therefore, according to the capacitance calculation formula C=εS / 4πkd, where C is the capacitance, ε is the dielectric constant of the medium, k is the electrostatic force constant, S is the overlapping area of ​​the two plates, and d is the vertical distance between the two plates, it can be seen that due to the presence 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 the part of the lens emitting plate 81 and the part of the lens receiving plate 82 with the projection area on the lens carrier metal plate 84 is larger. Therefore, 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 movement of the lens carrier 60 in the focusing direction, so that the lens carrier 60 can move to the target position, thereby improving the accuracy of the focus closed-loop control.

[0068] 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 based on the change in the capacitance value. This structure acts as a position sensor.

[0069] In one embodiment, there are two lens receiving plates 82 , which are arranged side by side along the first direction and are located below the lens emitting plate 81 .

[0070] In this case, the length of the lens emitting plate 81 can be greater than or equal to the lengths of the two lens receiving plates 82. If a gap exists 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 lengths of the lens emitting plate 81 and the lens receiving plate 82 are both measured along the first direction. The widths of the lens emitting plate 81 and the lens receiving plate 82 are the same, and the two lens receiving plates 82 have the same shape and size.

[0071] At this time, as the lens carrier 60 moves in the first direction, the projection area between the lens carrier metal plate 84 and one lens receiving plate 82 gradually decreases, while the projection area between the lens carrier metal plate 84 and the other lens receiving plate 82 gradually increases. However, the projection area between the lens carrier metal plate 84 and the lens transmitting plate 81 remains unchanged during movement. Therefore, as the lens carrier metal plate 84 moves in the first direction, the reference capacitance between the lens transmitting plate 81 and one lens receiving plate 82 gradually increases, while the reference capacitance between the lens transmitting plate 81 and the other lens receiving plate 82 gradually decreases. This embodiment provides two lens receiving plates 82. The linearly varying capacitance between the lens transmitting plate 81 and the two lens receiving plates 82 enhances the robustness of the capacitance signal and further improves the accuracy of the focus closed-loop control. Furthermore, this embodiment uses two reference capacitances to control the movement of the lens carrier 60 to the target position, further offsetting the effects of environmental factors on the acquired capacitance signal. This allows for more precise control of the position of the lens carrier 60, thereby improving the accuracy of the focus closed-loop control.

[0072] In one embodiment, referring to Figure 4 、 Figures 12 to 14 A prism emitting plate 85 is built into the rear side of the base 10. A nodding receiving plate 86 is provided on the side of the prism emitting plate 85 along the third direction. A shaking receiving plate 87 is built into the side of the base 10. The prism emitting plate 85 is connected to a prism carrier capacitor IC88 provided in the base 10. The prism carrier capacitor IC88, the nodding receiving plate 86, and the shaking receiving plate 87 are all powered by a base built-in circuit provided in the base 10. A prism carrier built-in metal is provided in the prism carrier. A prism carrier metal plate 89 is provided 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 emitting plate 85 and the nodding receiving plate 86. 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.

[0073] 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 capacitance monitoring structure identical to the lens carrier 60, thereby enabling 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 capacitance monitoring structure, thereby enabling position monitoring of the prism carrier and the prism in the shaking head direction.

[0074] In one embodiment, there are two nodding receiving plates 86 , which are respectively arranged on the upper and lower sides of the prism emitting plate 85 .

[0075] There are two oscillating receiving plates 87 , and the two oscillating receiving plates 87 are arranged side by side along the first direction.

[0076] In one embodiment, both the lens carrier capacitor IC83 and the prism carrier capacitor IC88 are existing capacitor IC chips.

[0077] 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 is preferably a CHM9500 model chip.

[0078] In one embodiment, the prism carrier includes a first prism carrier 20 and a second prism carrier 30 , wherein the second prism carrier 30 is disposed at the lower end of the first prism carrier 20 , wherein the prism 91 is mounted on the first prism carrier 20 .

[0079] Reference Figure 8 and Figure 10 The bottom end of the second prism carrier 30 is provided with an oscillating ball 41, which abuts against the bottom end of the base 10. The second prism carrier 30 moves around the first direction with the oscillating ball 41 as a fulcrum. Figure 9 A nodding ball 42 is provided 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.

[0080] 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 .

[0081] The present invention provides rolling support through the shaking ball 41 and the nodding ball 42, so that the nodding and shaking movements are light and smooth, reducing the movement resistance of the prism carrier, and allowing the prism carrier to achieve stable nodding and shaking movements.

[0082] 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 respectively, and a movable ball 43 is connected in a rolling manner in the shaking ball groove.

[0083] The movable ball 43 is not fixedly connected to the base 10 or the second prism carrier 30, and can roll movably in the oscillating ball groove. When the second prism carrier 30 oscillates, the movable ball 43 rolls in the oscillating ball groove.

[0084] In one embodiment, referring to Figure 7 and Figure 8 Three shaking ball grooves are respectively provided at the bottom end of the second prism carrier 30 and the bottom end of the base 10. The three shaking ball grooves are distributed in a herringbone shape along the first direction. A shaking ball 41 is fixed in the shaking ball groove at the front end of the middle part, and movable balls 43 are rollingly connected in the shaking ball grooves on both sides of the rear end.

[0085] 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) the oscillating ball groove at the bottom end of the base 10 .

[0086] In one embodiment, referring to Figure 9 and Figure 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, and 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.

[0087] In one embodiment, referring to Figure 9 Two nodding balls 42 are provided at the top of the second prism carrier 30 along the second direction.

[0088] Specifically, the two nodding balls 42 are preferably located on the left and right sides of the top of the second prism carrier 30 .

[0089] In one embodiment, referring to Figure 7 、 Figure 8 and Figure 10 The prism drive mechanism includes a nodding coil 51 arranged on 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 on 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, under the cooperation of the two, drive the first prism carrier 20 to nod. The shaking coil 52 and the shaking magnet 54 are arranged opposite to each other and, under the cooperation of the two, drive the second prism carrier 30 and the first prism carrier 20 to shake.

[0090] The nodding coil 51 and the shaking coil 52 are both powered by a built-in circuit in the base 10 .

[0091] 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.

[0092] 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.

[0093] When each group has a plurality of nodding magnets 53, the plurality of nodding magnets 53 can be arranged side by side along the second direction, or as shown in FIG. Figure 8 As shown, they are arranged side by side along the third direction.

[0094] 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.

[0095] Reference Figure 8 and Figure 10 There are two groups of shaking magnets 54, and the two groups of shaking magnets 54 are arranged at the bottom end of the second prism carrier 30 along the second direction. Each group of shaking magnets 54 has one or several shaking magnets 54 arranged side by side.

[0096] When each group has a plurality of oscillating magnets 54, the plurality of oscillating magnets 54 can be arranged side by side along the second direction, or as shown in FIG. Figure 8 As shown, they are arranged side by side along a first direction.

[0097] In one embodiment, referring to Figure 12 and Figure 13 A first prism carrier built-in metal 22 is provided 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.

[0098] In one embodiment, referring to Figure 12 and Figure 13 A first prism carrier built-in metal 22 is provided in the first prism carrier 20 , and a first prism carrier adsorption metal 23 is provided at the middle bottom end of the first prism carrier built-in metal 22 .

[0099] A second prism carrier built-in metal 32 is provided in the second prism carrier 30 , and an adsorption magnet mounting portion 33 is provided at the top of the middle portion of the second prism carrier built-in metal 32 .

[0100] A first prism carrier adsorption magnet 34 is provided 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.

[0101] In one embodiment, referring to Figure 12 and Figure 13 A second prism carrier built-in metal 32 is provided in the second prism carrier 30 , and the bottom end of the second prism carrier built-in metal 32 is arranged opposite to the shaking magnet 54 and adsorbed to each other to improve the connection stability of the shaking magnet 54 .

[0102] In one embodiment, a bottom adsorption iron sheet is provided in the base 10, and the bottom adsorption iron sheet is located below the shaking coil 52. The bottom adsorption iron sheet and the shaking magnet 54 are arranged opposite to each other and adsorbed to each other to improve the connection stability between the second prism carrier 30 and the base 10.

[0103] In one embodiment, referring to Figure 6 and Figure 12 The zoom drive 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.

[0104] The zoom coil 55 is powered by a built-in circuit in the base 10 .

[0105] In one embodiment, referring to Figure 5 、 Figure 6 and Figure 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 .

[0106] In one embodiment, referring to Figure 6 and Figure 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.

[0107] The anti-collision portion 62 is made of elastic material, such as rubber, plastic or silicone etc. Preferably, the anti-collision portion 62 is made of soft rubber.

[0108] In one embodiment, referring to Figure 7 and Figure 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 when the lens carrier 60 moves.

[0109] Specifically, longer lens ball grooves 66 can be provided on the left and right sides of the bottom end of the lens carrier 60, a shorter lens ball groove is provided on one side of the bottom end of the base 10 and a lens ball 44 is provided, and two shorter lens ball grooves are provided on the other side of the bottom end of the base 10 and a lens ball 44 is provided respectively. The length direction of the lens ball grooves is the first direction, and each lens ball 44 can roll freely in the upper and lower lens ball grooves.

[0110] In one embodiment, referring to Figure 12 and Figure 13 The bottom of the lens carrier 60 is provided with a lens carrier adsorption magnet 63. The base 10 is provided with a base built-in metal. The base built-in metal and the lens carrier adsorption magnet 63 are arranged opposite and mutually attracted. The lens carrier 60 is provided with a lens carrier built-in metal 64. The bottom of the lens carrier built-in metal 64 is arranged opposite and mutually attracted to the lens carrier adsorption magnet 63, making the structure between the lens carrier 60 and the base 10 more stable.

[0111] Specifically, refer to Figure 11 An adsorption magnet mounting groove 65 may be provided at the bottom end of the lens carrier 60 , and the lens carrier adsorption magnet 63 may be installed in the adsorption magnet mounting groove 65 .

[0112] In one embodiment, referring to Figure 12 and Figure 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.

[0113] 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.

[0114] In one embodiment, referring to Figure 1 and Figure 5 The housing 70 is provided with a downward recess 71 , which is equivalent to a downward protrusion relative to the top surface inside the housing 70 .

[0115] Reference Figure 5 and Figure 9 The top of the first prism carrier 20 is provided with an upward protrusion 24 .

[0116] After the housing 70 and base 10 are detachably connected, the recess 71 is located on the side of the protrusion 24, with a small preset gap between the two. The two cooperate to form a retaining structure between the housing 70 and the base 10. The gap between the two can be determined based on the actual anti-shake and floating requirements of the prism carrier to ensure that the normal nodding and shaking movements of the prism carrier are not hindered.

[0117] 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 undergo a large amount of movement, and the various adsorption parts may be detached. At this time, the top of the first prism carrier 20 may touch the outer shell 70.

[0118] If the above-mentioned recess 71 and protrusion 24 are not designed, the first prism carrier 20 may collide with the housing 70 at the front end, the rear end, or the side. This collision is uncontrollable, and the point at which the collision force is transmitted is also uncontrollable. As a result, the prism carrier cannot return to its original position after the collision, resulting in the inability to perform anti-shake operation.

[0119] 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 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 transmission point.

[0120] In one embodiment, referring to Figure 1 and Figure 5 There are recesses 71 on both sides of the rear end of the shell 70, and the recesses 71 are arranged across the rear side and side of the shell 70. There are protrusions 24 on the top rear side and both sides of the prism carrier. After the shell 70 and the base 10 are detachably connected, each recess 71 is located between each adjacent two protrusions 24.

[0121] In one embodiment, referring to Figure 5 The front side of the recess 71 is a first inclined surface 71a. Figure 9 The rear side surfaces of the protrusions 24 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 .

[0122] While the preferred embodiments of the present invention have been described in detail above, 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. Such equivalents also fall within the scope of the claims appended hereto.

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 disposed within 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 about the first direction and in a second direction perpendicular to the first direction; It is characterized by: A lens emitting plate and a lens receiving plate are built into the side wall of the base, and the lens emitting plate and the lens receiving plate are arranged along a third direction perpendicular to the first direction. The lens emitting plate is connected to a lens carrier capacitor IC provided in the base, and the lens carrier capacitor IC and the lens receiving plate are both powered by a base built-in circuit provided in the base; A lens carrier built-in metal is provided in the lens carrier, a lens carrier metal plate is provided on the side of the lens carrier built-in metal, and the lens carrier metal plate is arranged opposite to the lens transmitting plate and the lens receiving plate; The direct projection area between the lens carrier metal plate and the lens emitting plate, and the direct projection area between the lens carrier metal plate and the lens receiving plate both change as the lens carrier metal plate moves. Due to the presence of the lens carrier metal plate, the distance between the lens emitting plate and the lens receiving plate is effectively shortened, resulting in a larger capacitance of the portion of the lens emitting plate and the portion of the lens receiving plate whose projection area is on the lens carrier metal plate. As a result, as the lens carrier metal plate moves with the lens carrier, the capacitance between the lens emitting plate and the lens receiving plate exhibits a linear change trend, allowing the lens carrier capacitor IC to determine the position of the lens carrier based on the linearly changing capacitance. When the lens carrier metal plate moves with the lens carrier, the capacitance value between the lens emitting plate and the lens receiving plate will change. The capacitance value between the lens emitting plate and the lens receiving plate is monitored by the lens carrier capacitor IC, and the movement position of the lens carrier is monitored according to the change in the capacitance value. There is no need to power the lens carrier metal plate located on the lens carrier.

2. The lens driving device according to claim 1, wherein: There are two lens receiving plates, which are arranged side by side along the first direction and located below the lens emitting plate.

3. The lens driving device according to claim 1, wherein: The zoom drive mechanism includes a zoom coil provided on the inner side wall of the base and a zoom magnet provided on the side wall of the lens carrier, wherein the zoom coil and the zoom magnet are provided 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 the front and rear ends respectively; 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 rotatably connected in the lens ball groove; And / or, a lens carrier adsorption magnet is provided at the bottom end of the lens carrier, a base built-in metal is provided 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; 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.

4. The lens driving device according to claim 3, wherein: The 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.

5. The lens driving device according to claim 1, 2, 3 or 4, wherein: The prism carrier includes a first prism carrier and a second prism carrier arranged at the lower end of the first prism carrier, a shaking ball is provided at the bottom end of the second prism carrier, the shaking ball abuts the bottom end of the base, and the second prism carrier moves around the first direction with the shaking ball as the fulcrum, and a nodding ball is provided at the top end of the second prism carrier, the nodding ball abuts the bottom end of the first prism carrier, and the first prism carrier moves around the second direction with the nodding ball as the fulcrum.

6. The lens driving device according to claim 5, wherein: An oscillating ball groove is provided between the bottom end of the second prism carrier and the base, and a movable ball is rotatably connected in the oscillating ball groove.

7. The lens driving device according to claim 6, wherein: Three shaking head ball grooves are arranged between the bottom end of the second prism carrier and the base. The three shaking head ball grooves are distributed in a herringbone shape along the first direction. The shaking head ball is fixed in the shaking head ball groove in the middle, and the movable balls are rollingly connected in the shaking head ball grooves on both sides.

8. The lens driving device according to claim 5, wherein: 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.

9. The lens driving device according to claim 8, wherein: Two nodding balls are provided at the top end of the second prism carrier along the second direction.

10. The lens driving device according to claim 5, wherein: The prism driving mechanism includes a nodding coil arranged on the rear side of the base, a shaking coil arranged at the bottom end of the base, a nodding magnet arranged on the rear side of the first prism carrier, and a shaking magnet arranged at the bottom end of the second prism carrier. The nodding coil is arranged opposite to the nodding magnet, and the shaking coil is arranged opposite to the shaking magnet.

11. The lens driving device according to claim 10, wherein: A first prism carrier built-in metal is provided 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 is attracted to each other; And / or, a second prism carrier built-in metal is provided in the second prism carrier, and the bottom end of the second prism carrier built-in metal is arranged opposite to the oscillating magnet and is attracted to each other; And / or, a bottom adsorption iron sheet is provided in the base, the bottom adsorption iron sheet is located below the oscillating head coil, and the bottom adsorption iron sheet and the oscillating head magnet are arranged opposite to each other and adsorbed to each other.

12. The lens driving device according to claim 5, wherein: A first prism carrier built-in metal is provided in the first prism carrier, and a first prism carrier adsorption metal is provided at the bottom of the middle portion of the first prism carrier built-in metal; A second prism carrier built-in metal is provided in the second prism carrier, and an adsorption magnet mounting portion is provided 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 the first prism carrier adsorption metal and adsorbed to each other, and is respectively arranged opposite to the adsorption magnet mounting portion and adsorbed to each other.

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