Lens driving device

Abstract

The invention belongs to the technical field of optical imaging equipment, and particularly relates to a lens driving device which comprises a shell, a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism. At least one corner of the top end of the prism carrier is provided with a corner internal pressing groove matched with the corner internal pressing protrusion, and after the shell is detachably connected with the base, the corner internal pressing protrusion is located in the corner internal pressing groove so as to limit the position of the prism carrier. According to the invention, the position of the prism carrier is limited through the cooperation of the corner inward-pressing projection at the top end of the housing and the corner inward-pressing groove at the top end of the prism carrier.

Description

Technical Field

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

[0002] With the development of technology, many electronic devices (such as smart phones or digital cameras) now have the function of taking photos or recording videos. These electronic devices are becoming more and more popular and are developing in the direction of convenient and lightweight 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, both of which are arranged in a hollow cavity formed by a shell and a base, wherein the prism part is arranged at the rear end, and an 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] Specifically, the prism part can usually nod and shake its head on the base to change the angle of light, and the top of the prism part usually does not touch the outer shell when doing these actions. However, in extreme cases, such as special scenarios where a terminal equipped with a lens drive device falls from a high place, the prism part may move a large amount, and the various adsorption parts may detach, at which time the top of the part may touch the outer shell. The collision point between the prism part and the outer shell is uncontrollable, and the point at which the collision force is transmitted is also uncontrollable, which will cause the prism part to be unable to return to its position after the collision, resulting in the problem that the anti-shake operation cannot be performed. 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, comprising a housing, a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism, wherein the housing and the base are detachably connected and form 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;

[0007] At least one corner position of the top end of the shell is provided with a corner inward pressure protrusion protruding toward the inside of the shell, and at least one corner position of the top end of the prism carrier is provided with a corner inward pressure groove matched with the corner inward pressure protrusion. After the shell and the base are detachably connected, the corner inward pressure protrusion is located in the corner inward pressure groove to achieve position limitation of the prism carrier.

[0008] Optionally, two adjacent corner positions on the rear side of the top end of the housing are respectively provided with a corner internal pressure protrusion;

[0009] The prism carrier is arranged at the rear side of the hollow cavity, and two adjacent corners at the rear side of the top end of the prism carrier are respectively provided with a corner inner pressure groove.

[0010] Optionally, a limiting groove is provided on one of the side walls of the shell and the side walls of the base and a limiting protrusion matching the limiting groove is provided on the other; after the shell and the base are detachably connected, the limiting protrusion is plugged into the limiting groove to limit the position of the shell.

[0011] Optionally, one of the shell side wall and the base side wall is provided with one or more locking holes and the other is provided with a locking protrusion matching the locking hole, and the locking protrusion is engaged with the locking hole to achieve a detachable connection between the shell and the base.

[0012] Optionally, a base built-in bottom plate is arranged in the bottom surface of the base, the base built-in bottom plate has a bottom plate welding head, a base built-in circuit is distributed in the base, the base built-in circuit has a built-in circuit welding head, a welding port is arranged on the base, and the bottom plate welding head and the built-in circuit welding head are respectively located in the welding port;

[0013] The shell is provided with an avoidance groove. After the shell is detachably connected to the base, the avoidance groove is located outside the welding port, so that the welding port is open to the shell.

[0014] Optionally, a horizontal bar for limiting the movement of the lens is arranged at the top of the lens carrier.

[0015] Optionally, the zoom drive mechanism drives the lens carrier to move along a first direction, and the zoom drive mechanism includes a zoom coil arranged on the inner 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.

[0016] Optionally, a lens carrier built-in metal is arranged in the lens carrier, the lens carrier built-in metal has a side surface, and the side surface of the lens carrier built-in metal is arranged opposite to the zoom magnet and is attracted to each other.

[0017] Optionally, the zoom coil is powered by a base built-in circuit in the base.

[0018] Optionally, zoom balls are arranged on both sides of the bottom end of the lens carrier, and zoom ball grooves are arranged on both sides of the inner bottom end of the base, and the zoom balls abut against the zoom ball grooves.

[0019] Optionally, a lens carrier adsorption magnet is arranged at the bottom end of the lens carrier, and a base built-in bottom plate made of a metal material is arranged in the bottom surface of the base, and the base built-in bottom plate and the lens carrier adsorption magnet are arranged opposite to each other and adsorbed to each other.

[0020] Optionally, a lens carrier built-in metal is provided in the lens carrier, and the bottom end of the lens carrier built-in metal is arranged opposite to the lens carrier adsorption magnet and adsorbs to each other.

[0021] Optionally, the zoom drive mechanism drives the lens carrier to move along a first direction;

[0022] A lens emitter plate and a lens receiver plate are built into the side wall of the base, and the lens emitter plate and the lens receiver plate are arranged along a third direction perpendicular to the first direction, and the lens emitter plate and the lens receiver plate are respectively powered by a base built-in circuit in the base and are respectively connected to a zoom chip, and the zoom chip is used to monitor the capacitance value between the lens emitter plate and the lens receiver plate;

[0023] A lens carrier built-in metal is arranged in the lens carrier, a built-in movable metal plate is arranged on one side of the lens carrier built-in metal, and the built-in movable metal plate is arranged opposite to the lens emitting plate and the lens receiving plate.

[0024] Optionally, there are two lens receiving plates, and the two lens receiving plates are arranged side by side along the first direction.

[0025] Optionally, the lens carrier and the prism carrier are arranged in the base along a first direction, and the prism driving mechanism drives the prism carrier to move around the first direction and a second direction perpendicular to the first direction;

[0026] A bottom protrusion is provided in the base, and the height of the bottom protrusion is higher than the installation area in the base for installing the lens carrier. The front side of the bottom protrusion is provided as a base slope structure, and the front bottom end of the prism carrier is provided as a carrier slope structure adapted to the base slope structure. After the prism carrier is installed in the base, the carrier slope structure abuts against the base slope structure.

[0027] Optionally, the prism carrier includes a first prism carrier and a second prism carrier arranged in a mounting groove at the bottom end of the first prism carrier, the corner inward pressure groove is located at at least one corner position of the top end of the first prism carrier, the carrier slope structure is located at the bottom end of the front side of the first prism carrier, and a mounting protrusion is provided at the bottom end of the first prism carrier, and the mounting protrusion extends from a mounting protrusion avoidance port provided on the second prism carrier to realize the connection between the first prism carrier and the second prism carrier.

[0028] Optionally, the prism driving mechanism includes a nodding coil and a shaking head coil arranged on the inner wall of the rear side of the base, a nodding magnet and a shaking head magnet arranged on the rear side of the first prism carrier, the nodding coil has the shaking head coil on both sides, the nodding magnet has the shaking head magnet on both sides, the nodding coil and the nodding magnet are arranged opposite to each other, and each shaking head coil is arranged opposite to a corresponding shaking head magnet.

[0029] Optionally, a nodding magnet groove for mounting the nodding magnet is provided in the middle of the rear side of the first prism carrier, and shaking head magnet grooves for mounting the shaking head magnet are provided on both sides of the nodding magnet groove.

[0030] Optionally, a first prism carrier built-in metal is disposed in the first prism carrier, a rear back plate is disposed on the first prism carrier built-in metal, and the rear back plate is respectively disposed opposite to the nodding magnet and the shaking magnet and adsorbed to each other.

[0031] Optionally, the nodding coil and the shaking coil are powered by a built-in circuit in the base respectively.

[0032] Optionally, a fixed ball groove and two movable ball grooves are provided on the bottom protrusion, the two movable ball grooves are distributed along the second direction, and the two movable ball grooves and the fixed ball groove are distributed in a triangle;

[0033] A fixed ball and two movable balls are disposed at the bottom end of the second prism carrier, the fixed ball abuts against the fixed ball groove, each movable ball abuts against a corresponding movable ball groove, and the second prism carrier moves around the first direction with the fixed ball as a fulcrum;

[0034] Two nodding ball support grooves are arranged in the installation groove, and two nodding balls are arranged on the top of the second prism carrier. The two nodding balls are distributed along the second direction, and each nodding ball is respectively abutted against a corresponding nodding ball support groove, and the first prism carrier moves around the second direction with the nodding balls as fulcrums.

[0035] Optionally, a second prism carrier built-in metal is disposed in the second prism carrier.

[0036] Optionally, a prism carrier adsorption magnet is provided on one of the bottom end of the mounting protrusion and the top end of the bottom protrusion, and an adsorption component is provided on the other, and the prism carrier adsorption magnet and the adsorption component are arranged opposite to each other and adsorbed to each other.

[0037] Optionally, the prism carrier adsorption magnet is arranged in the magnet installation groove at the bottom end of the installation protrusion, and the adsorption member is arranged at the top end of the bottom protrusion;

[0038] The first prism carrier is provided with a first prism carrier built-in metal, the first prism carrier built-in metal is provided with a mounting protrusion supporting metal, the mounting protrusion supporting metal is pre-buried in the mounting protrusion, and the mounting protrusion supporting metal and the prism carrier adsorption magnet are arranged opposite to each other and adsorbed to each other.

[0039] Optionally, a first prism carrier built-in metal is provided in the first prism carrier, a nodding emitter plate and a shaking head emitter plate are provided on the first prism carrier built-in metal, a first contact point is provided on the first prism carrier built-in metal, a second contact point is provided on the base, the second contact point is powered by a base built-in circuit in the base, the second contact point is connected to the first contact point through a metal elastic member and energized, and the base built-in circuit sequentially powers the shaking head emitter plate and the nodding emitter plate via the second contact point, the metal elastic member and the first contact point;

[0040] A nodding receiving plate arranged opposite to the nodding transmitting plate is arranged at the bottom end of the base, and a shaking head receiving plate arranged opposite to the shaking head transmitting plate is arranged in the side wall of the base. The nodding receiving plate and the shaking head receiving plate are respectively powered by the built-in circuit of the base and are respectively connected to the prism chip. The prism chip is respectively used to monitor the capacitance value between the nodding transmitting plate and the nodding receiving plate, and to detect the capacitance value between the shaking head transmitting plate and the shaking head receiving plate.

[0041] Optionally, the metal elastic member is a spring leaf.

[0042] Beneficial effect: The present invention has at least one or more of the following advantages: The present invention realizes the position limitation of the prism carrier through the cooperation of the corner internal pressure protrusion at the top of the shell and the corner internal pressure groove at the top of the prism carrier, so that the prism carrier can only be restricted to shaking within a smaller range, which will not hinder the small movements of the prism carrier when nodding, and the collision contact between the prism carrier and the shell can only be limited between the corner internal pressure protrusion and the corner internal pressure groove, ultimately achieving the purpose of controllable contact surface and collision force transfer point. 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 3for Figure 1 BB cross-sectional view;

[0046] Figure 4 for Figure 1 CC section view;

[0047] Figure 5 for Figure 1 Exploded diagram of

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

[0049] Figure 7 for Figure 6 Another angle further exploded the diagram;

[0050] Figure 8 A schematic diagram of the internal structure of the base of the present invention;

[0051] Fig. 9 for Figure 8 Exploded diagram of

[0052] Fig.10 A schematic diagram of the structure of the lens carrier and the prism carrier of the present invention;

[0053] Fig.11 for Fig.10 Schematic diagram of another corner of ;

[0054] Fig.12 A diagram showing the positional relationship between the metal built into the lens carrier and the zoom magnet of the present invention;

[0055] Fig.13 A schematic diagram of the structure of the prism carrier of the present invention;

[0056] Fig.14 for Fig.13 Exploded diagram of

[0057] Fig.15 for Fig.14 Schematic diagram of another corner of ;

[0058] Fig.16 for Fig.14 Schematic diagram of the internal structure. DETAILED DESCRIPTION

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] Reference Figures 1 to 16 An embodiment of the present invention provides a lens driving device, which includes a housing 10, a base 20, a prism carrier 30, a lens carrier 40, a prism driving mechanism and a zoom driving mechanism.

[0065] The housing 10 and the base 20 are detachably connected to form a hollow cavity, and the prism carrier 30, the lens carrier 40, the prism driving mechanism and the zoom driving mechanism are arranged in the hollow cavity.

[0066] A prism carrier 30 is provided on one side of the hollow cavity, and the prism carrier 30 is used to install a prism. A lens carrier 40 is provided on the other side of the hollow cavity, and the lens carrier 40 is used to install a lens. The lens carrier 40 and the prism carrier 30 are arranged in the hollow cavity along a first direction. The zoom drive mechanism drives the lens carrier 40 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. The prism can turn the direction of the passing light, and the prism carrier can move the prism to change the irradiation direction of the light. 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.

[0067] Reference Figure 5 At least one corner position at the top of the shell 10 is provided with a corner inward pressure protrusion 11 protruding toward the inside of the shell 10, and at least one corner position at the top of the prism carrier 30 is provided with a corner inward pressure groove 31 adapted to the corner inward pressure protrusion 11. After the shell 10 and the base 20 are detachably connected, the corner inward pressure protrusion 11 is located in the corner inward pressure groove 31 to limit the position of the prism carrier 30.

[0068] During specific implementation, the corner internal pressure protrusion 11 can move within the corner internal pressure groove 31, that is, there is a preset gap between the two, and the gap can be determined according to the actual anti-shake floating requirements of the prism carrier 30. The smaller gap allows the corner internal pressure protrusion 11 and the corner internal pressure groove 31 to cooperate with each other to limit the prism carrier 30 while not hindering the small movements of the prism carrier 30 when nodding.

[0069] Normally, when the prism carrier 30 is nodding or shaking its head, the top of the prism carrier 30 will not touch the outer shell 10. However, in extreme cases, such as when a terminal equipped with a lens driving device falls from a high place, the prism carrier 30 may move a large amount and the adsorption parts may detach. At this time, the top of the prism carrier 30 may touch the outer shell 10.

[0070] If the above-mentioned corner internal pressure protrusion 11 and corner internal pressure groove 31 are not designed, the prism carrier 30 may collide with the outer shell 10 at the front end, the rear end, or the side. This collision is uncontrollable, and the transmission point of the collision force is also uncontrollable, which will cause the prism carrier 30 to be unable to return to its original position after the collision, resulting in the problem that the anti-shake operation cannot be performed.

[0071] The present invention, through the cooperation of the above-mentioned corner internal pressure protrusion 11 and the corner internal pressure groove 31, can limit the shaking of the prism carrier 30 to a smaller range, and the collision contact between the prism carrier 30 and the outer shell 10 can only be limited between the corner internal pressure protrusion 11 and the corner internal pressure groove 31, ultimately achieving the purpose of controllable contact surface and collision force transfer point.

[0072] In one embodiment, two adjacent corners at the rear side of the top of the housing 10 are respectively provided with a corner inner pressure protrusion 11. The prism carrier 30 is disposed at the rear side of the hollow cavity, and two adjacent corners at the rear side of the top of the prism carrier 30 are respectively provided with a corner inner pressure groove 31.

[0073] In one embodiment, a limiting groove is provided on one of the side walls of the shell 10 and the side walls of the base 20 and a limiting protrusion matching the limiting groove is provided on the other. After the shell 10 and the base 20 are detachably connected, the limiting protrusion is inserted into the limiting groove to achieve position limitation of the shell 10.

[0074] Reference Figure 5 and Figure 6 A limiting groove 12 is provided on the side wall of the shell 10, and a limiting protrusion 22 matching the limiting groove 12 is provided on the side wall of the base 20. After the shell 10 and the base 20 are detachably connected, the limiting protrusion 22 is plugged into the limiting groove 12 to realize the position limitation of the shell 10.

[0075] In one embodiment, one of the side walls of the shell 10 and the side walls of the base 20 is provided with one or more locking holes and the other is provided with a locking protrusion matching the locking hole, and the locking protrusion is engaged with the locking hole to achieve a detachable connection between the shell 10 and the base 20.

[0076] Reference Figure 5 and Figure 6 The side wall of the shell 10 is provided with a plurality of locking holes 13, and the side wall of the base 20 is provided with a plurality of locking protrusions 23 that match the locking holes 13. The locking protrusions 23 are engaged with the locking holes 13 to achieve a locking connection between the shell 10 and the base 20.

[0077] In one embodiment, referring to Figure 5 , Figure 6 , Figure 8 and Fig. 9The bottom surface of the base 20 is provided with a base built-in bottom plate 241, the base built-in bottom plate 241 has a bottom plate welding head 2411, the base built-in circuit 242 is distributed in the base 20, the base built-in circuit 242 has a built-in circuit welding head 2421, the base 20 is provided with a welding port 24, the bottom plate welding head 2411 and the built-in circuit welding head 2421 are respectively located in the welding port 24. The housing 10 is provided with an avoidance groove 14, after the housing 10 and the base 20 are detachably connected, the avoidance groove 14 is located outside the welding port 24, so that the welding port 24 is open to the housing 10.

[0078] Usually, the built-in bottom plate 241 of the base and the built-in circuit 242 of the base are made of two different metals, and they cannot be designed as an integrated structure, and can only be welded in the later process. The welding port 24 in this embodiment is located at the intersection of the bottom plate welding head 2411 and the built-in circuit welding head 2421. After welding, the built-in bottom plate 241 of the base and the built-in circuit 242 of the base can be connected, so that the built-in bottom plate 241 of the base can achieve a grounding effect. In this embodiment, through the design of the welding port 24 and the avoidance groove 14, the welding operation can also be performed on the welding port 24 after the housing 10 is installed, which provides convenience for the subsequent welding process.

[0079] In a specific implementation, the avoidance groove 14 is preferably located at a corner of the housing 10 , and avoids the welding opening 24 disposed on the side wall of the base 20 .

[0080] In one embodiment, referring to Figures 5 to 7 , Fig.11 A cross bar 41 for limiting the movement of the lens is provided at the top of the lens carrier 40.

[0081] In this embodiment, a horizontal piece 41 is provided at the top of the lens carrier 40 to improve the installation stability of the lens installed on the lens carrier 40 .

[0082] In one embodiment, the lens carrier 40 and the prism carrier 30 are arranged in the base 20 along the first direction, and the zoom driving mechanism drives the lens carrier 40 to move along the first direction to realize the zoom function. Figure 4 , Figures 7 to 11 The zoom driving mechanism includes a zoom coil 51 arranged on the inner wall of the base 20 and a zoom magnet 52 arranged on the side wall of the lens carrier 40. The zoom coil 51 and the zoom magnet 52 are arranged opposite to each other, and the two cooperate to generate a driving force to enable the lens carrier 40 to perform a zoom movement action.

[0083] In one embodiment, referring to Fig.12A lens carrier built-in metal 42 is disposed in the lens carrier 40 . The lens carrier built-in metal 42 has a side surface 421 . The side surface 421 of the lens carrier built-in metal 42 is disposed opposite to the zoom magnet 52 and is attracted to each other to improve the connection stability of the zoom magnet 52 .

[0084] In one embodiment, the zoom coil 51 is powered by a base built-in circuit 242 within the base 20 .

[0085] In one embodiment, referring to Fig.10 , zoom balls 43 are arranged on both sides of the bottom end of the lens carrier 40. Figure 6 and Figure 7 Zoom ball grooves 25 are provided on both sides of the bottom end of the base 20 , and the zoom ball 43 abuts against the zoom ball grooves 25 .

[0086] The zoom ball 43 cooperates with the zoom ball groove 25 to reduce the friction force of the lens carrier 40 when it moves.

[0087] In one embodiment, referring to Fig.10 The bottom end of the lens carrier 40 is provided with a lens carrier adsorption magnet 44. Figure 8 and Fig. 9 A built-in base plate 241 made of metal is disposed on the bottom surface of the base 20 , and the built-in base plate 241 and the lens carrier adsorption magnet 44 are disposed opposite to each other and adsorbed to each other.

[0088] An adsorption force is generated between the lens carrier adsorption magnet 44 and the built-in bottom plate 241 of the base, so that the connection structure between the lens carrier 40 and the base 20 is more stable, and the zoom ball 43 is prevented from being separated from the zoom ball groove 25.

[0089] In one embodiment, referring to Fig.12 A lens carrier built-in metal 42 is disposed in the lens carrier 40, and the bottom end of the lens carrier built-in metal 42 is disposed opposite to the lens carrier adsorption magnet 44 and adsorbed to each other, so that the structure between the lens carrier 40 and the base 20 is more stable.

[0090] In one embodiment, the zoom driving mechanism drives the lens carrier 40 to move along the first direction to achieve the zoom function. Figure 4 , Figure 8 and Fig. 9, a lens emitter plate 61 and a lens receiving plate 62 are built into the side wall of the base 20, and the lens emitter plate 61 and the lens receiving plate 62 are arranged along a third direction perpendicular to the first direction, and the lens emitter plate 61 and the lens receiving plate 62 are respectively powered by the base built-in circuit 242 in the base 20 and are respectively connected to the zoom chip 63, and the zoom chip 63 is used to monitor the capacitance value between the lens emitter plate 61 and the lens receiving plate 62. In other words, the zoom chip 63 is a capacitor IC chip used to monitor the capacitance value in the prior art.

[0091] Reference Figure 4 and Fig.12 A lens carrier built-in metal 42 is provided in the lens carrier 40, and a built-in movable metal plate 422 is provided on one side of the lens carrier built-in metal 42. The built-in movable metal plate 422 is arranged opposite to the lens emitter plate 61 and the lens receiving plate 62 to form a floating capacitor structure.

[0092] When the built-in movable metal plate 422 moves along the first direction with the lens carrier 40, the projection area between the built-in movable metal plate 422 and the lens emitter plate 61, and the projection area between the built-in movable metal plate 422 and the lens receiver plate 62 change with the movement of the built-in movable metal plate 422. Therefore, the capacitance value between the lens emitter plate 61 and the lens receiver plate 62 will change, and the moving position of the lens carrier 40 can be monitored according to the change in the capacitance value, and this structure plays the role of a position sensor.

[0093] In a specific implementation, when the lens carrier built-in metal 42 has a side surface 421, as Fig.12 As shown, the side surface 421 is disposed opposite to the built-in movable metal plate 422 .

[0094] In one embodiment, there are two lens receiving plates 62 , and the two lens receiving plates 62 are arranged side by side along the first direction and are located below the lens emitting plate 61 .

[0095] At this time, the length of the lens emitter plate 61 may be greater than or equal to the length of the two lens receiving plates 62. In the case where there is a gap between the two lens receiving plates 62, the length of the lens emitter plate 61 is greater than or equal to the sum of the length of the two lens receiving plates 62 and the gap. Among them, the length of the lens emitter plate 61 and the length of the lens receiving plate 62 are both lengths along the first direction, the width of the lens emitter plate 61 and the width of the lens receiving plate 62 are the same, and the two lens receiving plates 62 have the same shape and size.

[0096] At this time, as the lens carrier 40 moves along the first direction, the area of ​​the projection area between the built-in movable metal plate 422 and one lens receiving electrode plate 62 gradually decreases, and the area of ​​the projection area between the built-in movable metal plate 422 and the lens emitting electrode plate 61 gradually increases, while the area of ​​the projection area between the built-in movable metal plate 422 and the lens emitting electrode plate 61 remains unchanged during the movement. Therefore, as the built-in movable metal plate 422 moves along the first direction as the lens carrier 40 moves, the reference capacitance between the lens emitting electrode plate 61 and one lens receiving electrode plate 62 gradually increases, and the reference capacitance between the lens emitting electrode plate 61 and the other lens receiving electrode plate 62 gradually decreases. In this embodiment, two lens receiving electrodes 62 are provided. The capacitance between the lens emitting electrode plate 61 and the two lens receiving electrodes 62 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 40 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 40 movement is controlled more accurately, thereby improving the accuracy of the focus closed-loop control.

[0097] In one embodiment, the lens carrier 40 and the prism carrier 30 are disposed in the base 20 along a first direction, and the prism driving mechanism drives the prism carrier 30 to move around the first direction and a second direction perpendicular to the first direction.

[0098] Reference Figure 2 and Figure 6 The base 20 is provided with a bottom protrusion 26, the height of the bottom protrusion 26 is higher than the mounting area of ​​the base 20 for mounting the lens carrier 40, and the front side of the bottom protrusion 26 is provided with a base slope structure 261. Fig.13 The front bottom end of the prism carrier 30 is configured as a carrier slope structure 32 that is compatible with the base slope structure 261 . After the prism carrier 30 is installed in the base 20 , the carrier slope structure 32 abuts against the base slope structure 261 .

[0099] In this embodiment, the two slope structures cooperate to make the prism carrier 30 more stable when performing the nodding action.

[0100] In one embodiment, referring to Figures 13 to 15The prism carrier 30 includes a first prism carrier 30a and a second prism carrier 30b arranged in a mounting groove 33 at the bottom end of the first prism carrier 30a. The corner inner pressure groove 31 is located at at least one corner position of the top end of the first prism carrier 30a. The carrier slope structure 32 is located at the bottom end of the front side of the first prism carrier 30a. A mounting protrusion 341 is provided at the bottom end of the first prism carrier 30a. The mounting protrusion 341 extends from a mounting protrusion avoidance opening 342 provided on the second prism carrier 30b to realize the connection between the first prism carrier 30a and the second prism carrier 30b.

[0101] In one embodiment, referring to Figures 6 to 9 , Fig.11 , Fig.13 and Fig.15 The prism driving mechanism includes a nodding coil 53 and a shaking coil 54 arranged on the inner wall of the rear side of the base 20, and a nodding magnet 55 and a shaking magnet 56 arranged on the rear side of the first prism carrier 30a. The nodding coil 53 has a shaking coil 54 on both sides, and the nodding magnet 55 has a shaking magnet 56 on both sides. The nodding coil 53 and the nodding magnet 55 are arranged opposite to each other and drive the first prism carrier 30a and the prism to nod relative to the second prism carrier 30b under the cooperation of the two. Each shaking coil 54 is arranged opposite to a corresponding shaking magnet 56 and drives the second prism carrier 30b, the first prism carrier 30a and the carrier to shake relative to the base 20 under the cooperation of the two.

[0102] In one embodiment, a nodding magnet groove for mounting a nodding magnet 55 is disposed in the middle of the rear side of the first prism carrier 30 a , and shaking head magnet grooves for mounting a shaking head magnet 56 are disposed on both sides of the nodding magnet groove.

[0103] In one embodiment, there are two nodding magnets 55 , and the two nodding magnets 55 are arranged side by side along the third direction.

[0104] In one embodiment, there are four shaking head magnets 56 , and the four shaking head magnets 56 are arranged in groups of two on both sides of the nodding magnet 55 along the second direction.

[0105] In one embodiment, referring to Fig.16 A first prism carrier built-in metal 35 is provided in the first prism carrier 30a, and a rear back plate 351 is provided on the first prism carrier built-in metal 35. The rear back plate 351 is respectively arranged opposite to the nodding magnet 55 and the shaking magnet 56 and adsorbed to each other to play the role of fixing the magnet.

[0106] In one embodiment, the nodding coil 53 and the shaking coil 54 are powered by the base built-in circuit 242 in the base 20 respectively.

[0107] In one embodiment, referring to Figure 6 and Figure 7 A fixed ball groove 262 and two movable ball grooves 263 are provided on the bottom protrusion 26 . The two movable ball grooves 263 are distributed along the second direction, and the two movable ball grooves 263 and the fixed ball grooves 262 are distributed in a triangle.

[0108] Reference Fig.10 , Fig.13 and Fig.15 A fixed ball 361 and two movable balls 362 are provided at the bottom end of the second prism carrier 30b. The fixed ball 361 abuts against the fixed ball groove 262, and each movable ball 362 abuts against a corresponding movable ball groove 263. When shaking the head, the second prism carrier 30b shakes and rotates around the first direction with the fixed ball 361 as a fulcrum, and the two movable balls 362 move in the movable ball groove 263.

[0109] Reference Fig.15 Two nodding ball support grooves 371 are provided in the mounting groove 33. Fig.14 Two nodding balls 372 are provided at the top of the second prism carrier 30b. The two nodding balls 372 are distributed along the second direction. Each nodding ball 372 is respectively abutted against a corresponding nodding ball support groove 371. When the first prism carrier 30a performs a nodding action, the first prism carrier 30a performs a nodding action around the second direction with the nodding ball 372 as a fulcrum.

[0110] In one embodiment, a second prism carrier built-in metal 38 is disposed in the second prism carrier 30 b , and the second prism carrier built-in metal 38 can enhance the structural strength of the second prism carrier 30 b and provide better supporting force for the fixed balls 361 and the movable balls 362 .

[0111] In a specific implementation, the installation protrusion avoidance opening 342 penetrates the second prism carrier built-in metal 38 , so that the installation protrusion 341 passes through the second prism carrier built-in metal 38 in the second prism carrier 30 b .

[0112] In one embodiment, in order to ensure the stability of the connection structure between the first prism carrier 30a, the second prism carrier 30b and the base 20, a prism carrier adsorption magnet is provided on one of the bottom end of the mounting protrusion 341 and the top end of the bottom protrusion 26, and an adsorption component is provided on the other. The prism carrier adsorption magnet and the adsorption component are arranged opposite to each other and adsorbed to each other. An adsorption force is generated between the prism carrier adsorption magnet and the adsorption component, so that the first prism carrier 30a and the second prism carrier 30b are tightly abutted against each ball, thereby avoiding the phenomenon of each ball falling out of the groove.

[0113] In one embodiment, referring to Fig.13 and Fig.15The bottom end of the mounting protrusion 341 is provided with a magnet mounting groove and a prism carrier adsorption magnet 343 is installed. Figure 6 and Figure 7 The top of the bottom protrusion 26 is provided with an adsorption component installation groove and is installed with an adsorption component 264. The prism carrier adsorption magnet 343 and the adsorption component 264 are arranged opposite to each other and adsorbed to each other.

[0114] Reference Fig.16 The first prism carrier 30a is provided with a first prism carrier built-in metal 35, and the first prism carrier built-in metal 35 is provided with a mounting protrusion support metal 352, and the mounting protrusion support metal 352 is pre-buried in the mounting protrusion 341, and the mounting protrusion support metal 352 and the prism carrier adsorption magnet 343 are arranged opposite to each other and adsorbed to each other. The mounting protrusion support metal 352 can adsorb and fix the prism carrier adsorption magnet 343, thereby improving the installation stability of the prism carrier adsorption magnet 343.

[0115] In one embodiment, referring to Figure 2 , Figure 3 and Fig.16 The first prism carrier 30a is provided with a first prism carrier built-in metal 35, a nodding emitter plate 64 and a shaking emitter plate 65 are provided on the first prism carrier built-in metal 35, and a first contact point 353 is provided on the first prism carrier built-in metal 35. Figure 8 and Fig. 9 A second contact point 271 is provided on the base 20, and the second contact point 271 is powered by the built-in circuit 242 in the base 20. The second contact point 271 is connected to the first contact point 353 through the metal elastic part 272 and energized. The built-in circuit 242 in the base sequentially supplies power to the shaking head emitter plate 65 and the nodding emitter plate 64 via the second contact point 271, the metal elastic part 272 and the first contact point 353.

[0116] Reference Figure 2 , Figure 3 , Figure 8 and Fig. 9 The bottom end of the base 20 is provided with a nodding receiving plate 66 arranged opposite to the nodding transmitting plate 64, and the side wall of the base 20 is provided with a shaking receiving plate 67 arranged opposite to the shaking transmitting plate 65. The nodding receiving plate 66 and the shaking receiving plate 67 are respectively powered by the built-in circuit 242 of the base and are respectively connected to the prism chip 68. The prism chip 68 is used to monitor the capacitance value between the nodding transmitting plate 64 and the nodding receiving plate 66, and to detect the capacitance value between the shaking transmitting plate 65 and the shaking receiving plate 67. In other words, the prism chip 68 is a capacitor IC chip used to monitor the capacitance value in the prior art.

[0117] In this embodiment, the nodding emitter plate 64 and the nodding receiver plate 66 are arranged opposite to each other and form a capacitor structure. When the first prism carrier 30a performs a nodding action, the capacitance value of the capacitor structure will change, thereby realizing the position monitoring of the nodding direction of the prism. The shaking emitter plate 65 and the shaking receiver plate 67 are arranged opposite to each other and form a capacitor structure. When the first prism carrier 30a performs a shaking action along with the second prism carrier 30b, the capacitance value of the capacitor structure will change, thereby realizing the position monitoring of the shaking direction of the prism.

[0118] In one embodiment, there are two nodding receiving plates 66 , and the two nodding receiving plates 66 are arranged side by side along the first direction.

[0119] In one embodiment, there are two oscillating receiving plates 67 , and the two oscillating receiving plates 67 are arranged side by side along the first direction.

[0120] In one embodiment, the metal elastic member 272 is a spring.

[0121] Specifically, the spring sheet includes two connecting parts and a spring wire, and the two ends of the spring wire are respectively connected to the two connecting parts, one connecting part is connected to the first contact point 353, and the other connecting part is connected to the second contact point 271, so as to establish a connection between the first contact point 353 and the second contact point 271 through the spring sheet to conduct electricity.

[0122] In the above-mentioned design of the present invention, a capacitor structure is formed between the lens emitting plate 61 and the lens receiving plate 62, between the nodding emitting plate 64 and the nodding receiving plate 66, and between the shaking emitting plate 65 and the shaking receiving plate 67 after power is turned on, and the transmitting and receiving relationship thereof still has the effect of the capacitor structure in reverse, that is, the relationship between the emitting plate and the receiving plate can be swapped, which does not affect the position monitoring effect of the capacitor structure.

[0123] 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 housing, a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism, wherein the housing and the base are detachably connected and form 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; It is characterized in that At least one corner position of the top end of the shell is provided with a corner inward pressure protrusion protruding toward the inside of the shell, and at least one corner position of the top end of the prism carrier is provided with a corner inward pressure groove matched with the corner inward pressure protrusion. After the shell and the base are detachably connected, the corner inward pressure protrusion is located in the corner inward pressure groove to achieve position limitation of the prism carrier.

2. The lens driving device according to claim 1, wherein: Two adjacent corners at the rear side of the top end of the housing are respectively provided with a corner internal pressure protrusion; The prism carrier is arranged at the rear side of the hollow cavity, and two adjacent corners at the rear side of the top end of the prism carrier are respectively provided with a corner inner pressure groove.

3. The lens driving device according to claim 1, wherein: A limiting groove is provided on one of the side walls of the shell and the side walls of the base, and a limiting protrusion matched with the limiting groove is provided on the other side wall. After the shell and the base are detachably connected, the limiting protrusion is plugged into the limiting groove to limit the position of the shell; And / or, one of the side wall of the shell and the side wall of the base is provided with one or more locking holes and the other is provided with a locking protrusion matched with the locking hole, and the locking protrusion is engaged with the locking hole to realize a detachable connection between the shell and the base; And / or, a built-in base plate is provided in the bottom surface of the base, the built-in base plate has a base plate welding head, a built-in base circuit is distributed in the base, the built-in base circuit has a built-in circuit welding head, a welding port is provided on the base, the base plate welding head and the built-in circuit welding head are respectively located in the welding port; an avoidance groove is provided on the outer shell, and after the outer shell and the base are detachably connected, the avoidance groove is located outside the welding port, so that the welding port is open to the outer shell.

4. The lens driving device according to claim 1, 2 or 3, characterized in that: A horizontal bar for limiting the movement of the lens is arranged at the top of the lens carrier; And / or, the zoom drive mechanism drives the lens carrier to move along the first direction, the zoom drive 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, the zoom coil and the zoom magnet are arranged opposite to each other; preferably, a lens carrier built-in metal is arranged in the lens carrier, the lens carrier built-in metal has a side surface, the side surface of the lens carrier built-in metal is arranged opposite to the zoom magnet and is attracted to each other; preferably, optionally, the zoom coil is powered by a base built-in circuit in the base; And / or, zoom balls are arranged on both sides of the bottom end of the lens carrier, zoom ball grooves are arranged on both sides of the bottom end of the base, and the zoom balls abut against the zoom ball grooves; preferably, a lens carrier adsorption magnet is arranged on the bottom end of the lens carrier, and a base built-in bottom plate made of metal material is arranged on the bottom surface of the base, and the base built-in bottom plate and the lens carrier adsorption magnet are arranged opposite to each other and adsorbed to each other; more preferably, a lens carrier built-in metal is arranged in the lens carrier, and the bottom end of the lens carrier built-in metal is arranged opposite to the lens carrier adsorption magnet and adsorbed to each other; And / or, the zoom drive mechanism drives the lens carrier to move along a first direction; a lens emitter plate and a lens receiving plate are built into the side wall of the base, the lens emitter plate and the lens receiving plate are arranged along a third direction perpendicular to the first direction, the lens emitter plate and the lens receiving plate are respectively powered by the base built-in circuit in the base and are respectively connected to the zoom chip, the zoom chip is used to monitor the capacitance value between the lens emitter plate and the lens receiving plate; a lens carrier built-in metal is provided in the lens carrier, a built-in movable metal plate is provided on one side of the built-in metal of the lens carrier, and the built-in movable metal plate is arranged opposite to the lens emitter plate and the lens receiving plate; preferably, there are two lens receiving plates, and the two lens receiving plates are arranged side by side along the first direction.

5. The lens driving device according to claim 1, 2 or 3, characterized in that: The lens carrier and the prism carrier are arranged in the base along a first direction, and the prism driving mechanism drives the prism carrier to move around the first direction and a second direction perpendicular to the first direction; A bottom protrusion is provided in the base, and the height of the bottom protrusion is higher than the installation area in the base for installing the lens carrier. The front side of the bottom protrusion is provided as a base slope structure, and the front bottom end of the prism carrier is provided as a carrier slope structure adapted to the base slope structure. After the prism carrier is installed in the base, the carrier slope structure abuts against the base slope structure.

6. The lens driving device according to claim 5, characterized in that: The prism carrier includes a first prism carrier and a second prism carrier arranged in a mounting groove at the bottom end of the first prism carrier, the corner inner pressure groove is located at at least one corner position of the top end of the first prism carrier, the carrier slope structure is located at the bottom end of the front side of the first prism carrier, and a mounting protrusion is provided at the bottom end of the first prism carrier. The mounting protrusion extends from a mounting protrusion avoidance port provided on the second prism carrier to realize the connection between the first prism carrier and the second prism carrier.

7. The lens driving device according to claim 6, wherein: The prism driving mechanism comprises a nodding coil and a shaking head coil arranged on the inner wall of the rear side of the base, a nodding magnet and a shaking head magnet arranged on the rear side of the first prism carrier, the shaking head coil is respectively provided on both sides of the nodding coil, the shaking head magnet is respectively provided on both sides of the nodding magnet, the nodding coil and the nodding magnet are arranged opposite to each other, and each shaking head coil is arranged opposite to a corresponding shaking head magnet; Preferably, a nodding magnet groove for mounting the nodding magnet is provided in the middle of the rear side of the first prism carrier, and shaking head magnet grooves for mounting the shaking head magnet are provided on both sides of the nodding magnet groove; Preferably, a first prism carrier built-in metal is arranged in the first prism carrier, a rear back plate is arranged on the first prism carrier built-in metal, and the rear back plate is respectively arranged opposite to the nodding magnet and the shaking magnet and adsorbed to each other; Preferably, the nodding coil and the shaking coil are powered by a base built-in circuit in the base respectively.

8. The lens driving device according to claim 6, wherein: The bottom protrusion is provided with a fixed ball groove and two movable ball grooves, the two movable ball grooves are distributed along the second direction, and the two movable ball grooves and the fixed ball groove are distributed in a triangle; A fixed ball and two movable balls are disposed at the bottom end of the second prism carrier, the fixed ball abuts against the fixed ball groove, each movable ball abuts against a corresponding movable ball groove, and the second prism carrier moves around the first direction with the fixed ball as a fulcrum; Two nodding ball support grooves are arranged in the installation groove, and two nodding balls are arranged on the top of the second prism carrier. The two nodding balls are distributed along the second direction, and each nodding ball is respectively abutted against a corresponding nodding ball support groove, and the first prism carrier moves around the second direction with the nodding balls as fulcrums.

9. The lens driving device according to claim 8, wherein: A second prism carrier built-in metal is disposed in the second prism carrier; And / or, a prism carrier adsorption magnet is provided on one of the bottom end of the mounting protrusion and the top end of the bottom protrusion, and an adsorption component is provided on the other, and the prism carrier adsorption magnet is arranged opposite to the adsorption component and adsorbs to each other; preferably, the prism carrier adsorption magnet is arranged in the magnet mounting groove at the bottom end of the mounting protrusion, and the adsorption component is arranged on the top end of the bottom protrusion; a first prism carrier built-in metal is arranged in the first prism carrier, a mounting protrusion supporting metal is arranged on the first prism carrier built-in metal, and the mounting protrusion supporting metal is pre-buried in the mounting protrusion, and the mounting protrusion supporting metal and the prism carrier adsorption magnet are arranged opposite to each other and adsorb to each other.

10. The lens driving device according to claim 6, wherein: A first prism carrier built-in metal is provided in the first prism carrier, a nodding emitter plate and a shaking emitter plate are provided on the first prism carrier built-in metal, a first contact point is provided on the first prism carrier built-in metal, a second contact point is provided on the base, the second contact point is powered by a base built-in circuit in the base, the second contact point is connected to the first contact point through a metal elastic member, and the base built-in circuit supplies power to the shaking emitter plate and the nodding emitter plate via the second contact point, the metal elastic member and the first contact point in sequence; A nodding receiving plate arranged opposite to the nodding transmitting plate is arranged at the bottom end of the base, and a shaking head receiving plate arranged opposite to the shaking head transmitting plate is arranged in the side wall of the base. The nodding receiving plate and the shaking head receiving plate are respectively powered by the built-in circuit of the base and are respectively connected to the prism chip, and the prism chip is respectively used to monitor the capacitance value between the nodding transmitting plate and the nodding receiving plate, and to detect the capacitance value between the shaking head transmitting plate and the shaking head receiving plate; Preferably, the metal elastic member is a leaf spring.

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