Lens driving device

Abstract

The utility model belongs to the technical field of optical imaging equipment, and particularly relates to a lens driving device, which comprises a 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 utility model, 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] This utility model belongs to the field of optical imaging equipment technology, and specifically relates to a lens driving device. Background Technology

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

[0003] Lens drive mechanisms are used in lightweight designs because they can significantly reduce the overall thickness and weight of the device. A typical lens drive mechanism consists of two parts: a lens section and a prism section. Both are housed within a hollow cavity formed by a housing and a base. The prism section is located at the rear end, while the imaging chip is positioned at the front end of the lens section. Light is reflected by the prism section, redirecting its path to the lens section, where it is then focused before reaching the imaging chip.

[0004] Specifically, the prism component typically nods and tilts on the base to change the angle of light, and its tip usually doesn't touch the outer casing during these movements. However, in extreme cases, such as when a terminal with a lens drive mechanism falls from a height, the prism component may experience significant movement, causing the adhesive parts to detach. In this situation, the tip of the prism component might hit the outer casing. The point of impact between the prism component and the outer casing is uncontrollable, and the transmission of the impact force is also unpredictable. This can cause the prism component to fail to return to its original position after the impact, resulting in the inability to perform image stabilization. Utility Model Content

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

[0006] A lens driving device includes a housing, a base, a prism carrier, a lens carrier, a prism driving mechanism, and a zoom driving mechanism. The housing and the base are detachably connected and form a hollow cavity. The prism carrier, the lens carrier, the prism driving mechanism, and the zoom driving mechanism are disposed in the hollow cavity.

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

[0008] Optionally, a corner indentation protrusion is provided at each of two adjacent corners on the rear side of the top of the outer casing;

[0009] The prism carrier is disposed on the rear side of the hollow cavity, and a corner indentation groove is provided at each of the two adjacent corner positions on the rear side of the top of the prism carrier.

[0010] Optionally, one of the outer shell sidewall and the base sidewall is provided with a limiting groove and the other is provided with a limiting protrusion that cooperates with the limiting groove. After the outer shell and the base are detachably connected, the limiting protrusion is inserted into the limiting groove to limit the position of the outer shell.

[0011] Optionally, one of the sidewalls of the outer casing and the sidewall of the base is provided with one or more locking holes, and the other is provided with a locking protrusion that mates with the locking hole. The locking protrusion engages with the locking hole to achieve a detachable connection between the outer casing and the base.

[0012] Optionally, the base has an internal base plate inside its bottom surface, the internal base plate has a base plate welding head, the base has internal circuits distributed inside its interior, the internal circuits have internal circuit welding heads, the base has a welding port, and the base plate welding head and the internal circuit welding head are respectively located inside the welding port.

[0013] The outer shell is provided with a clearance groove. After the outer shell and the base are detachably connected, the clearance groove is located outside the weld joint, so that the weld joint is open to the outer shell.

[0014] Optionally, the top of the lens carrier is provided with a crossbar for limiting lens movement.

[0015] Optionally, the zoom drive mechanism drives the lens carrier to move along a first direction. The zoom drive mechanism includes a zoom coil disposed on the inner sidewall of the base and a zoom magnet disposed on the sidewall of the lens carrier. The zoom coil and the zoom magnet are disposed opposite to each other.

[0016] Optionally, the lens carrier contains a built-in metal element, which has a side surface. The side surface of the built-in metal element is positioned opposite to and attracted to the zoom magnet.

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

[0018] Optionally, zoom balls are provided on both sides of the bottom end of the lens carrier, and zoom ball grooves are provided on both sides of the bottom end of the base, with the zoom balls abutting against the zoom ball grooves.

[0019] Optionally, the bottom of the lens carrier is provided with a lens carrier magnet, and the bottom surface of the base is provided with a metal base plate. The base plate and the lens carrier magnet are arranged opposite to each other and are attracted to each other.

[0020] Optionally, the lens carrier contains a built-in metal element, the bottom end of which is positioned opposite to and attracted to the lens carrier magnet.

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

[0022] The base has a built-in lens emitting electrode plate and a lens receiving electrode plate. The lens emitting electrode plate and the lens receiving electrode plate are arranged along a third direction perpendicular to the first direction. The lens emitting electrode plate and the lens receiving electrode plate are powered by the 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 emitting electrode plate and the lens receiving electrode plate.

[0023] The lens carrier contains a built-in metal element, and a movable metal plate is provided on one side of the built-in metal element. The movable metal plate is positioned opposite to the lens emitting electrode plate and the lens receiving electrode plate.

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

[0025] Optionally, the lens carrier and the prism carrier are disposed 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] The base has a bottom protrusion, the height of which is higher than the mounting area of ​​the lens carrier inside the base. The front side of the bottom protrusion is configured as a base ramp structure, and the bottom front side of the prism carrier is configured as a carrier ramp structure adapted to the base ramp structure. After the prism carrier is installed in the base, the carrier ramp structure abuts against the base ramp structure.

[0027] Optionally, the prism carrier includes a first prism carrier and a second prism carrier disposed in a mounting groove at the bottom end of the first prism carrier. The corner indentation groove is located at at least one corner of the top end of the first prism carrier. The carrier ramp structure is located at the bottom front end of the first prism carrier. The bottom end of the first prism carrier is provided with a mounting protrusion. The mounting protrusion extends from a mounting protrusion clearance opening disposed 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 swaying coil disposed on the inner wall of the rear side of the base, and a nodding magnet and a swaying magnet disposed on the rear side of the first prism carrier. The nodding coil has a swaying coil on each side, and the nodding magnet has a swaying magnet on each side. The nodding coil and the nodding magnet are disposed opposite to each other, and each swaying coil is disposed opposite to a corresponding swaying 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 a swaying magnet groove for mounting the swaying magnet is provided on both sides of the nodding magnet groove.

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

[0031] Optionally, the nodding coil and the shaking coil are powered by the built-in circuitry within the base.

[0032] Optionally, 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.

[0033] The bottom end of the second prism carrier is provided with a fixed ball and two movable balls. The fixed ball abuts against the fixed ball groove, and each of the movable balls abuts against a corresponding movable ball groove. The second prism carrier moves around the first direction with the fixed ball as the fulcrum.

[0034] The mounting groove is provided with two ball bearing support slots, and the top of the second prism carrier is provided with two ball bearings. The two ball bearings are distributed along the second direction, and each ball bearing abuts against a corresponding ball bearing support slot. The first prism carrier moves around the second direction with the ball bearings as fulcrums.

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

[0036] Optionally, one of the mounting protrusion bottom end and the bottom protrusion top end is provided with a prism carrier adsorbing magnet and the other is provided with an adsorbing element, the prism carrier adsorbing magnet and the adsorbing element are arranged opposite to each other and adsorb each other.

[0037] Optionally, the prism carrier adsorbs magnets in the magnet mounting groove at the bottom of the mounting protrusion, and the adsorption element is provided at the top of the bottom protrusion;

[0038] The first prism carrier has a built-in metal, and a mounting protrusion support metal is provided on the built-in metal. The mounting protrusion support metal is embedded in the mounting protrusion, and the mounting protrusion support metal and the prism carrier adsorption magnet are arranged opposite to each other and are attracted to each other.

[0039] Optionally, the first prism carrier contains a built-in metal, on which a nodding emitter plate and a swaying emitter plate are disposed. A first contact point is disposed on the built-in metal, and a second contact point is disposed on the base. The second contact point is powered by a built-in circuit within the base. The second contact point and the first contact point are connected and energized by a metal elastic element. The built-in circuit of the base supplies power to the swaying emitter plate and the nodding emitter plate in sequence through the second contact point, the metal elastic element, and the first contact point.

[0040] The base has a nodding receiving plate disposed at its inner bottom, opposite to the nodding emitting plate. The base has a swaying receiving plate disposed inside its side wall, opposite to the swaying emitting plate. The nodding receiving plate and the swaying receiving plate are powered by the base's built-in circuitry and are respectively connected to a prism chip. The prism chip is used to monitor the capacitance value between the nodding emitting plate and the nodding receiving plate, and to detect the capacitance value between the swaying emitting plate and the swaying receiving plate.

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

[0042] Beneficial effects: This utility model has at least one or more of the following advantages: This utility model achieves positional limitation of the prism carrier by cooperating with the inner pressure protrusion at the corner of the top of the outer shell and the inner pressure groove at the corner of the top of the prism carrier, so that the prism carrier can only be limited to shaking within a small range. It will not hinder the small-amplitude movement of the prism carrier when it nods. Moreover, the collision contact between the prism carrier and the outer shell can only be limited between the inner pressure protrusion and the inner pressure groove at the corner, ultimately achieving the purpose of controllable contact surface and collision force transmission point. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of this utility model;

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

[0045] Figure 3 for Figure 1 BB section view;

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

[0047] Figure 5 for Figure 1 Exploded view;

[0048] Figure 6 for Figure 5 Further exploded view;

[0049] Figure 7 for Figure 6 The other corner is further exploded;

[0050] Figure 8 This is a schematic diagram of the internal structure of the base of this utility model;

[0051] Figure 9 for Figure 8 Exploded view;

[0052] Figure 10 This is a schematic diagram of the structure of the lens carrier and prism carrier of this utility model;

[0053] Figure 11 for Figure 10 Another corner diagram;

[0054] Figure 12 This diagram illustrates the positional relationship between the built-in metal and the zoom magnet in the lens carrier of this utility model.

[0055] Figure 13 This is a schematic diagram of the structure of the prism carrier of this utility model;

[0056] Figure 14 for Figure 13 Exploded view;

[0057] Figure 15 for Figure 14 Another corner diagram;

[0058] Figure 16 for Figure 14 A schematic diagram of the internal structure. Detailed Implementation

[0059] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are only for illustrating the essential spirit of the technical solution of the present invention.

[0060] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0061] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0062] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0063] In the following description, the first direction is defined as the direction along the optical axis of the lens, the second direction is the direction perpendicular to the first direction and parallel to the lower surface of the base, and the third direction is the direction perpendicular to the first and second directions. That is, the third direction is the direction of the plumb line when the base is normally placed. In other words, if a coordinate system is established with the third direction as the Z-axis and the first direction as the X-axis, then the second direction is the Y-axis.

[0064] Reference Figures 1 to 16 This utility model 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 outer shell 10 and the base 20 are detachably connected and form a hollow cavity. 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 disposed on one side of the hollow cavity, for mounting a prism. A lens carrier 40 is disposed on the other side of the hollow cavity, for mounting a lens. The lens carrier 40 and the prism carrier 30 are disposed within the hollow cavity along a first direction. A zoom drive mechanism drives the lens carrier 40 to move along the first direction to achieve zoom functionality. A prism drive mechanism drives the prism carrier to move around the first direction and in a second direction perpendicular to the first direction to achieve optical image stabilization. The prism carrier drives the prism to perform nodding and shaking motions. The prism can deflect the direction of passing light, and the prism carrier can move the prism to change the direction of light illumination. The nodding motion refers to the prism carrier rotating around the second direction, and the shaking motion refers to the prism carrier rotating around the first direction.

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

[0068] In practice, the corner inner pressure protrusion 11 can move within the corner inner pressure groove 31, meaning there is a preset gap between them. The gap can be determined according to the actual anti-shake floating requirements of the prism carrier 30. The smaller gap allows the corner inner pressure protrusion 11 and the corner inner pressure groove 31 to cooperate in limiting the prism carrier 30 while not hindering the small-amplitude movements of the prism carrier 30 when it nods.

[0069] Normally, when the prism carrier 30 makes a nodding or shaking motion, the top of the prism carrier 30 will not touch the outer shell 10. However, in extreme cases, such as when a terminal with a lens driving device falls from a height, the prism carrier 30 may experience a large amount of movement, and the adsorption parts may detach. In this case, the top of the prism carrier 30 may touch the outer shell 10.

[0070] Without the aforementioned corner inner pressure protrusion 11 and corner inner pressure groove 31, the prism carrier 30 may collide with the outer shell 10 at its front end, rear end, or side. Such collisions are uncontrollable, and the point at which the collision force is transmitted is also uncontrollable. This would cause the prism carrier 30 to be unable to return to its original position after the collision, resulting in the inability to perform anti-shake operation.

[0071] By combining the corner inner pressure protrusion 11 and the corner inner pressure groove 31, this utility model restricts the prism carrier 30 to a small range of swaying, and the collision contact between the prism carrier 30 and the outer shell 10 is limited to the corner inner pressure protrusion 11 and the corner inner pressure groove 31, thus achieving the purpose of controllable contact surface and collision force transmission point.

[0072] In one embodiment, a corner indentation protrusion 11 is provided at each of the two adjacent corners on the rear side of the top of the outer shell 10. The prism carrier 30 is disposed on the rear side of the hollow cavity, and a corner indentation groove 31 is provided at each of the two adjacent corners on the rear side of the top of the prism carrier 30.

[0073] In one embodiment, a limiting groove is provided on one of the side walls of the outer shell 10 and the side wall of the base 20, and a limiting protrusion that cooperates with the limiting groove is provided on the other. After the outer shell 10 and the base 20 are detachably connected, the limiting protrusion is inserted into the limiting groove to limit the position of the outer shell 10.

[0074] Reference Figure 5 and Figure 6 The outer shell 10 has a limiting groove 12 on its side wall, and the base 20 has a limiting protrusion 22 that cooperates with the limiting groove 12 on its side wall. After the outer shell 10 and the base 20 are detachably connected, the limiting protrusion 22 is inserted into the limiting groove 12 to limit the position of the outer shell 10.

[0075] In one embodiment, one of the sidewalls of the housing 10 and the base 20 is provided with one or more locking holes, and the other is provided with a locking protrusion that cooperates with the locking hole. The locking protrusion engages with the locking hole to achieve a detachable connection between the housing 10 and the base 20.

[0076] Reference Figure 5 and Figure 6 The outer shell 10 has several locking holes 13 on its side wall, and the base 20 has several locking protrusions 23 on its side wall that cooperate with the locking holes 13. The locking protrusions 23 engage with the locking holes 13 to achieve a locking connection between the outer shell 10 and the base 20.

[0077] In one embodiment, reference is made to Figure 5 , Figure 6 , Figure 8 and Figure 9The base 20 has an internal base plate 241 on its bottom surface, which has a base plate welding head 2411. Internal wiring 242 is distributed within the base 20, and each internal wiring has an internal wiring welding head 2421. A welding port 24 is provided on the base 20, with the base plate welding head 2411 and the internal wiring welding head 2421 located within the welding port 24. The outer casing 10 has a clearance groove 14. After the outer casing 10 and the base 20 are detachably connected, the clearance groove 14 is located outside the welding port 24, causing the welding port 24 to be open outside the outer casing 10.

[0078] Typically, the base plate 241 and the built-in wiring 242 are made of two different metals and cannot be designed as a single unit; they must be soldered together in a later process. In this embodiment, the solder joint 24 is located at the intersection of the base plate solder head 2411 and the built-in wiring solder head 2421. After soldering, the base plate 241 and the built-in wiring 242 are connected, enabling the base plate 241 to achieve grounding. This embodiment, through the design of the solder joint 24 and the clearance groove 14, allows for soldering of the solder joint 24 even after the outer casing 10 is installed, providing convenience for subsequent soldering processes.

[0079] In practice, the clearance groove 14 is preferably located at a corner of the outer casing 10, which avoids the welding port 24 provided on the side wall of the base 20.

[0080] In one embodiment, reference is made to Figures 5 to 7 , Figure 11 The top of the lens carrier 40 is provided with a crossbar 41 for restricting the movement of the lens.

[0081] This embodiment improves the installation stability of the lens mounted on the lens carrier 40 by providing a horizontal bar 41 at the top of the lens carrier 40.

[0082] In one embodiment, the lens carrier 40 and the prism carrier 30 are disposed within the base 20 along a first direction, and the zoom drive mechanism drives the lens carrier 40 to move along the first direction to achieve the zoom function. (Refer to...) Figure 4 , Figures 7 to 11 The zoom drive mechanism includes a zoom coil 51 disposed on the inner side wall of the base 20 and a zoom magnet 52 disposed on the side wall of the lens carrier 40. The zoom coil 51 and the zoom magnet 52 are disposed opposite to each other, and the two work together to generate a driving force, causing the lens carrier 40 to perform zoom movement.

[0083] In one embodiment, reference is made to Figure 12The lens carrier 40 has a built-in metal 42, which has a side 421. The side 421 of the built-in metal 42 is arranged opposite to the zoom magnet 52 and they are 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-integrated circuit 242 within the base 20.

[0085] In one embodiment, reference is made to Figure 10 Zoom balls 43 are located on both sides of the bottom of the lens carrier 40. (Refer to...) Figure 6 and Figure 7 The base 20 has zoom ball grooves 25 on both sides of the bottom end, and the zoom ball 43 abuts against the zoom ball grooves 25.

[0086] The friction of the lens carrier 40 during movement is reduced by the cooperation of the zoom ball 43 and the zoom ball groove 25.

[0087] In one embodiment, reference is made to Figure 10 A lens carrier magnet 44 is provided at the bottom of the lens carrier 40. (Refer to...) Figure 8 and Figure 9 The base 20 has a metal base plate 241 inside its bottom surface. The base plate 241 is positioned opposite to and attracted to the lens carrier magnet 44.

[0088] The lens carrier attracts the magnet 44 and the base plate 241 to generate an attraction force, making the connection structure between the lens carrier 40 and the base 20 more stable and preventing the zoom ball 43 from dislodging from the zoom ball groove 25.

[0089] In one embodiment, reference is made to Figure 12 The lens carrier 40 has a built-in metal 42 inside. The bottom end of the built-in metal 42 is positioned opposite to the lens carrier magnet 44 and they attract each other, making the structure between the lens carrier 40 and the base 20 more stable.

[0090] In one embodiment, the zoom drive mechanism drives the lens carrier 40 to move along a first direction to achieve the zoom function. (See reference...) Figure 4 , Figure 8 and Figure 9The base 20 has a lens emitting electrode 61 and a lens receiving electrode 62 built into its side wall. The lens emitting electrode 61 and lens receiving electrode 62 are arranged along a third direction perpendicular to the first direction. The lens emitting electrode 61 and lens receiving electrode 62 are powered by the base's built-in circuit 242 and are respectively connected to the zoom chip 63. The zoom chip 63 is used to monitor the capacitance value between the lens emitting electrode 61 and the lens receiving electrode 62. In other words, the zoom chip 63 is a capacitor IC chip used in the prior art for monitoring capacitance values.

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

[0092] As the built-in movable metal plate 422 moves along the first direction with the lens carrier 40, the projection areas between the built-in movable metal plate 422 and the lens emitting electrode 61, and between the built-in movable metal plate 422 and the lens receiving electrode 62, both change with the movement of the built-in movable metal plate 422. This causes a change in the capacitance value between the lens emitting electrode 61 and the lens receiving electrode 62. Based on this change in capacitance, the movement position of the lens carrier 40 can be monitored, thus this structure functions as a position sensor.

[0093] In practical implementation, when the lens carrier has a built-in metal 42 with a side surface 421, such as Figure 12 As shown, the side 421 is positioned opposite to the built-in movable metal plate 422.

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

[0095] At this time, the length of the lens emitting electrode 61 can be greater than or equal to the length of the two lens receiving electrodes 62. When there is a gap between the two lens receiving electrodes 62, the length of the lens emitting electrode 61 is greater than or equal to the sum of the lengths of the two lens receiving electrodes 62 and the gap. Specifically, the lengths of both the lens emitting electrode 61 and the lens receiving electrode 62 are along the first direction, the widths of the lens emitting electrode 61 and the lens receiving electrode 62 are the same, and the two lens receiving electrodes 62 have the same shape and size.

[0096] At this time, as the built-in movable metal plate 422 moves along the first direction with the lens carrier 40, the area of ​​its projection region with one lens receiving plate 62 gradually decreases, while the area of ​​its projection region with the other lens receiving plate 62 gradually increases. Meanwhile, the area of ​​its projection region with the lens emitting plate 61 remains unchanged during the movement. Therefore, as the built-in movable metal plate 422 moves along the first direction with the lens carrier 40, the reference capacitance between the lens emitting plate 61 and one lens receiving plate 62 gradually increases, while the reference capacitance between the lens emitting plate 61 and the other lens receiving plate 62 gradually decreases. This embodiment uses two lens receiving plates 62. The linearly varying capacitance between the lens emitting plate 61 and the two lens receiving plates 62 enhances the robustness of the capacitance signal, further improving the accuracy of the focus closed-loop control. Simultaneously, this embodiment uses two reference capacitances to control the lens carrier 40 to the target position, making it easier to counteract the influence of environmental factors on the acquired capacitance signal, resulting in more precise control of the lens carrier 40's position and thus improving the accuracy of the focus closed-loop control.

[0097] In one embodiment, the lens carrier 40 and the prism carrier 30 are disposed within 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 has a bottom protrusion 26, the height of which is higher than the mounting area of ​​the lens carrier 40 within the base 20. The front side of the bottom protrusion 26 is configured as a base ramp structure 261. (See reference...) Figure 13 The front bottom end of the prism carrier 30 is configured as a carrier ramp structure 32 that is adapted to the base ramp structure 261. After the prism carrier 30 is installed in the base 20, the carrier ramp structure 32 abuts against the base ramp structure 261.

[0099] In this embodiment, the combination of two ramp structures makes the prism carrier 30 more stable when it nods.

[0100] In one embodiment, reference is made to Figures 13 to 15The prism carrier 30 includes a first prism carrier 30a and a second prism carrier 30b disposed in a mounting groove 33 at the bottom end of the first prism carrier 30a. The corner indentation groove 31 is located at at least one corner position at the top end of the first prism carrier 30a. The carrier ramp structure 32 is located at the bottom front side of the first prism carrier 30a. The bottom end of the first prism carrier 30a is provided with a mounting protrusion 341. The mounting protrusion 341 extends from the mounting protrusion clearance opening 342 disposed 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, reference is made to Figures 6 to 9 , Figure 11 , Figure 13 and Figure 15 The prism driving mechanism includes a nodding coil 53 and a swaying coil 54 disposed on the inner rear wall of the base 20, and a nodding magnet 55 and a swaying magnet 56 disposed on the rear side of the first prism carrier 30a. The nodding coil 53 has a swaying coil 54 on each side, and the nodding magnet 55 has a swaying magnet 56 on each side. The nodding coil 53 and the nodding magnet 55 are positioned opposite each other, and their combined action drives the first prism carrier 30a and the prism to nod relative to the second prism carrier 30b. Each swaying coil 54 is positioned opposite to a corresponding swaying magnet 56, and their combined action drives the second prism carrier 30b, the first prism carrier 30a, and the carrier to sway relative to the base 20.

[0102] In one embodiment, a nodding magnet groove for mounting a nodding magnet 55 is provided at the center of the rear side of the first prism carrier 30a, and a swaying magnet groove for mounting a swaying magnet 56 is provided on both sides of the nodding magnet groove.

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

[0104] In one embodiment, there are four nodding magnets 56, which are arranged in pairs along the second direction on both sides of the nodding magnet 55.

[0105] In one embodiment, reference is made to Figure 16 The first prism carrier 30a contains a first prism carrier built-in metal 35, and the first prism carrier built-in metal 35 is provided with a rear back plate 351. The rear back plate 351 is respectively arranged opposite to the nodding magnet 55 and the shaking magnet 56 and attracts each other to fix the magnets.

[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.

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

[0108] Reference Figure 10 , Figure 13 and Figure 15 The bottom end of the second prism carrier 30b is provided with a fixed ball 361 and two movable balls 362. 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 performing the shaking motion, the second prism carrier 30b rotates around the first direction with the fixed ball 361 as the fulcrum, and the two movable balls 362 move within the movable ball groove 263.

[0109] Reference Figure 15 Two ball bearing support grooves 371 are provided within the mounting groove 33. (Refer to...) Figure 14 The top of the second prism carrier 30b is provided with two nodding balls 372. The two nodding balls 372 are distributed along the second direction. Each nodding ball 372 abuts 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 balls 372 as the fulcrum.

[0110] In one embodiment, a second prism carrier 30b is provided with a second prism carrier built-in metal 38. The second prism carrier built-in metal 38 can enhance the structural strength of the second prism carrier 30b and provide better support for the fixed ball 361 and the movable ball 362.

[0111] In practice, the installation protrusion avoidance opening 342 penetrates the built-in metal 38 of the second prism carrier so that the installation protrusion 341 can pass through the built-in metal 38 of the second prism carrier 30b.

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

[0113] In one embodiment, reference is made to Figure 13 and Figure 15The bottom of the mounting protrusion 341 is provided with a magnet mounting groove, and a prism carrier is installed to attract the magnet 343. (Refer to...) Figure 6 and Figure 7 The bottom protrusion 26 has an adsorption component mounting groove at the top and an adsorption component 264 is installed thereon. The prism carrier adsorption magnet 343 is arranged opposite to the adsorption component 264 and adsorbs each other.

[0114] Reference Figure 16 The first prism carrier 30a contains a built-in metal 35, and a mounting protrusion support metal 352 is provided on the built-in metal 35. The mounting protrusion support metal 352 is embedded in the mounting protrusion 341. The mounting protrusion support metal 352 and the prism carrier adsorption magnet 343 are positioned opposite to each other and are attracted to each other. The mounting protrusion support metal 352 can attract and fix the prism carrier adsorption magnet 343, thereby improving the installation stability of the prism carrier adsorption magnet 343.

[0115] In one embodiment, reference is made to Figure 2 , Figure 3 and Figure 16 The first prism carrier 30a contains a built-in metal 35, on which a nodding emitter plate 64 and a tilting emitter plate 65 are disposed. A first contact point 353 is also disposed on the built-in metal 35. (Refer to...) Figure 8 and Figure 9 The base 20 is provided with a second contact point 271, which is powered by the base built-in circuit 242 inside the base 20. The second contact point 271 and the first contact point 353 are connected and energized by a metal elastic element 272. The base built-in circuit 242 supplies power to the oscillating emitting electrode plate 65 and the nodding emitting electrode plate 64 in sequence through the second contact point 271, the metal elastic element 272 and the first contact point 353.

[0116] Reference Figure 2 , Figure 3 , Figure 8 and Figure 9 The base 20 has a nodding receiving plate 66 disposed at its bottom inner end, opposite to the nodding transmitting plate 64. The base 20 also has a swing receiving plate 67 disposed on its side wall, opposite to the swing transmitting plate 65. The nodding receiving plate 66 and the swing receiving plate 67 are powered by the built-in circuit 242 and connected to the prism chip 68. The prism chip 68 is used to monitor the capacitance between the nodding transmitting plate 64 and the nodding receiving plate 66, and to detect the capacitance between the swing transmitting plate 65 and the swing receiving plate 67. In other words, the prism chip 68 is a capacitor IC chip used in the prior art for monitoring capacitance values.

[0117] In this embodiment, the nodding transmitting electrode 64 and the nodding receiving electrode 66 are arranged opposite each other to form a capacitor structure. When the first prism carrier 30a nods, the capacitance value of this capacitor structure changes, thereby enabling position monitoring of the nodding direction of the prism. The swaying transmitting electrode 65 and the swaying receiving electrode 67 are arranged opposite each other to form a capacitor structure. When the first prism carrier 30a sways along with the second prism carrier 30b, the capacitance value of this capacitor structure changes, thereby enabling position monitoring of the swaying direction of the prism.

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

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

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

[0121] Specifically, the reed includes two connecting parts and a spring wire. The two ends of the spring wire are connected to the two connecting parts respectively. 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 and conduct electricity between the first contact point 353 and the second contact point 271 through the reed.

[0122] In the above design of this utility model, a capacitor structure is formed between the lens emitting electrode 61 and the lens receiving electrode 62, between the nodding emitting electrode 64 and the nodding receiving electrode 66, and between the tilting emitting electrode 65 and the tilting receiving electrode 67 after being energized. The emitting and receiving relationship is reversed and still has the effect of the capacitor structure. That is to say, the relationship between the emitting electrode and the receiving electrode can be interchanged without affecting the position monitoring effect of the capacitor structure.

[0123] The preferred embodiments of this utility model have been described in detail above. However, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to this utility model. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A lens driving device, 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 disposed within the hollow cavity. Its features are, At least one corner of the top of the outer shell is provided with a corner inward pressure protrusion protruding inward toward the inside of the outer shell, and at least one corner of the top of the prism carrier is provided with a corner inward pressure groove adapted to the corner inward pressure protrusion. After the outer shell and the base are detachably connected, the corner inward pressure protrusion is located in the corner inward pressure groove to limit the position of the prism carrier.

2. The lens driving device as described in claim 1, characterized in that, The top rear side of the outer shell is provided with a corner inward pressure protrusion at each of the two adjacent corner positions; The prism carrier is disposed on the rear side of the hollow cavity, and a corner indentation groove is provided at each of the two adjacent corner positions on the rear side of the top of the prism carrier.

3. The lens driving device as described in claim 1, characterized in that, One of the outer shell sidewall and the base sidewall is provided with a limiting groove and the other is provided with a limiting protrusion that cooperates with the limiting groove. After the outer shell and the base are detachably connected, the limiting protrusion is inserted into the limiting groove to limit the position of the outer shell. And / or, one of the sidewalls of the outer casing and the sidewall of the base is provided with one or more locking holes and the other is provided with a locking protrusion that mates with the locking hole, the locking protrusion engaging with the locking hole to achieve a detachable connection between the outer casing and the base; And / or, the base has an internal base plate with a base plate welding head, and the base has internal wiring with internal wiring welding heads. The base has a welding port, and the base plate welding head and the internal wiring welding head are located in the welding port. The outer shell has a clearance groove. After the outer shell and the base are detachably connected, the clearance groove is located outside the welding port, so that the welding port is open to the outer shell.

4. The lens driving device as described in claim 1, 2, or 3, characterized in that, The top of the lens carrier is provided with a horizontal bar to restrict the movement of the lens. And / or, the zoom drive mechanism drives the lens carrier to move along a first direction. The zoom drive mechanism includes a zoom coil disposed on the inner side wall of the base and a zoom magnet disposed on the side wall of the lens carrier. The zoom coil and the zoom magnet are disposed opposite to each other. And / or, zoom balls are provided on both sides of the bottom end of the lens carrier, and zoom ball grooves are provided on both sides of the bottom end of the base, with the zoom balls abutting against the zoom ball grooves. And / or, the zoom drive mechanism drives the lens carrier to move along a first direction; the base sidewall has a built-in lens emitting electrode plate and a lens receiving electrode plate, the lens emitting electrode plate and the lens receiving electrode plate are arranged along a third direction perpendicular to the first direction, the lens emitting electrode plate and the lens receiving electrode plate are respectively powered by the base built-in circuit in the base and respectively connected to the zoom chip, the zoom chip is used to monitor the capacitance value between the lens emitting electrode plate and the lens receiving electrode plate; the lens carrier has a built-in metal, and a built-in movable metal plate is provided on one side of the built-in metal, the built-in movable metal plate is arranged opposite to the lens emitting electrode plate and the lens receiving electrode plate.

5. The lens driving device as described in claim 4, characterized in that, The lens carrier contains a built-in metal element, which has a side surface. The side surface of the built-in metal element is positioned opposite to and attracted to the zoom magnet.

6. The lens driving device as described in claim 4, characterized in that, The zoom coil is powered by the built-in circuitry within the base.

7. The lens driving device as described in claim 4, characterized in that, The bottom of the lens carrier is provided with a lens carrier magnet, and the bottom surface of the base is provided with a metal base plate. The base plate and the lens carrier magnet are arranged opposite to each other and are attracted to each other.

8. The lens driving device as described in claim 7, characterized in that, The lens carrier contains a built-in metal element, and the bottom end of the built-in metal element is positioned opposite to and attracted to the lens carrier magnet.

9. The lens driving device as described in claim 4, characterized in that, There are two lens receiving plates, which are arranged side by side along the first direction.

10. The lens driving device as described in claim 1, 2, or 3, characterized in that, The lens carrier and the prism carrier are disposed 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; The base has a bottom protrusion, the height of which is higher than the mounting area of ​​the lens carrier inside the base. The front side of the bottom protrusion is configured as a base ramp structure, and the bottom front side of the prism carrier is configured as a carrier ramp structure adapted to the base ramp structure. After the prism carrier is installed in the base, the carrier ramp structure abuts against the base ramp structure.

11. The lens driving device as claimed in claim 10, characterized in that, The prism carrier includes a first prism carrier and a second prism carrier disposed in a mounting groove at the bottom end of the first prism carrier. The corner indentation groove is located at at least one corner of the top end of the first prism carrier. The carrier ramp structure is located at the bottom front end of the first prism carrier. The bottom end of the first prism carrier is provided with a mounting protrusion. The mounting protrusion extends from a mounting protrusion clearance opening provided on the second prism carrier to realize the connection between the first prism carrier and the second prism carrier.

12. The lens driving device as claimed in claim 11, characterized in that, The prism driving mechanism includes a nodding coil and a swaying coil disposed on the inner wall of the rear side of the base, and a nodding magnet and a swaying magnet disposed on the rear side of the first prism carrier. The nodding coil has a swaying coil on each side, and the nodding magnet has a swaying magnet on each side. The nodding coil and the nodding magnet are arranged opposite to each other, and each swaying coil is arranged opposite to a corresponding swaying magnet.

13. The lens driving device as claimed in claim 12, characterized in that, The first prism carrier has a nodding magnet groove in the middle of its rear side for mounting the nodding magnet, and a swaying magnet groove is provided on both sides of the nodding magnet groove for mounting the swaying magnet.

14. The lens driving device as claimed in claim 12, characterized in that, The first prism carrier contains a built-in metal, and a rear back plate is provided on the built-in metal. The rear back plate is respectively positioned opposite to the nodding magnet and the shaking magnet and attracts each other.

15. The lens driving device as claimed in claim 12, characterized in that, The nodding coil and the shaking coil are powered by the built-in circuitry within the base.

16. The lens driving device as claimed in claim 11, characterized in that, 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 are arranged in a triangle with the fixed ball groove. The bottom end of the second prism carrier is provided with a fixed ball and two movable balls. The fixed ball abuts against the fixed ball groove, and each of the movable balls abuts against a corresponding movable ball groove. The second prism carrier moves around the first direction with the fixed ball as the fulcrum. The mounting groove is provided with two ball bearing support slots, and the top of the second prism carrier is provided with two ball bearings. The two ball bearings are distributed along the second direction, and each ball bearing abuts against a corresponding ball bearing support slot. The first prism carrier moves around the second direction with the ball bearings as fulcrums.

17. The lens driving device as claimed in claim 16, characterized in that, The second prism carrier contains a built-in metal. And / or, one of the mounting protrusion bottom end and the bottom protrusion top end is provided with a prism carrier adsorbing magnet and the other is provided with an adsorbing element, the prism carrier adsorbing magnet and the adsorbing element are arranged opposite to each other and adsorb each other.

18. The lens driving device as claimed in claim 17, characterized in that, The prism carrier adsorbs magnets in the magnet mounting groove at the bottom of the mounting protrusion, and the adsorption element is provided at the top of the bottom protrusion; the first prism carrier has a built-in metal, and a mounting protrusion support metal is provided on the built-in metal, which is embedded in the mounting protrusion, and the mounting protrusion support metal is arranged opposite to and adsorbs the prism carrier adsorbs magnets.

19. The lens driving device as claimed in claim 11, characterized in that, The first prism carrier contains a built-in metal element. A nodding emission electrode and a swaying emission electrode are disposed on the built-in metal element. A first contact point is disposed on the built-in metal element. A second contact point is disposed on the base. The second contact point is powered by a built-in circuit within the base. The second contact point and the first contact point are connected and energized by a metal elastic element. The built-in circuit of the base supplies power to the swaying emission electrode and the nodding emission electrode in sequence through the second contact point, the metal elastic element, and the first contact point. The base has a nodding receiving plate disposed at its inner bottom, opposite to the nodding emitting plate. The base has a swaying receiving plate disposed inside its side wall, opposite to the swaying emitting plate. The nodding receiving plate and the swaying receiving plate are powered by the base's built-in circuitry and are respectively connected to a prism chip. The prism chip is used to monitor the capacitance value between the nodding emitting plate and the nodding receiving plate, and to detect the capacitance value between the swaying emitting plate and the swaying receiving plate.

20. The lens driving device as claimed in claim 19, characterized in that, The metal elastic element is a spring.

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