Driving force enhanced combined anti-shake lens and electronic device

Abstract

The utility model discloses a kind of combined anti-shake lens of driving force enhancement and electronic equipment, the lens includes lens assembly, for carrying lens assembly's carrier and for installing the support of carrier;It further includes driving mechanism, the driving mechanism includes AF coil, OIS coil and shared magnetite;The AF coil and shared magnetite cooperation can drive carrier movement relative to support along optical axis direction and drive lens assembly to realize automatic focusing;The OIS coil and shared magnetite cooperation can drive support movement relative to base along XY plane perpendicular to optical axis and drive lens assembly to realize X axis and Y axis direction's anti-shake.The utility model is by AF and OIS magnetite sharing and shared magnetite two two relative rectangular arrangement, maximize magnetite volume and magnetic flux, provide stronger magnetic field for AF and OIS system.

Description

Technical Field

[0001] This utility model belongs to the field of optical lens technology, and in particular relates to a combined image stabilization lens and electronic device with enhanced driving force. Background Technology

[0002] In the consumer electronics field, the optical image stabilization (OIS) performance of camera modules is one of the key factors affecting image quality. The OIS motor, as the core component for achieving optical image stabilization, directly determines the quality of the stabilization effect through its driving force output efficiency. Currently, mainstream OIS motors on the market often use 3D springs as displacement support components to work with voice coil motors (VCMs) to drive the OIS bracket and carrier to move along the X and Y axes, thereby compensating for shake generated during shooting and ensuring clear images.

[0003] To meet the miniaturization demands of consumer electronics, existing OIS motors typically reduce their overall size by optimizing the magnet and coil arrangement of the VCM motor. Specifically, the magnets often employ trapezoidal or triangular structures, with their corresponding coils positioned at the four corners of the OIS bracket. While this arrangement effectively reduces the space occupied by the OIS motor and accommodates the installation requirements of miniaturized camera modules, it has significant drawbacks in terms of drive force transmission. Because the OIS bracket itself has a rectangular structure, its center of gravity does not match the direction of the Lorentz force generated by the magnets and coils at the four corners. This Lorentz force actually acts at a 45-degree angle to the OIS bracket, rather than perpendicular to the effective driving direction along the bracket's edges. This causes a shift in the driving force, preventing it from fully meeting the displacement requirements of the OIS bracket and directly resulting in insufficient effective driving force received by the OIS bracket.

[0004] At the same time, the effective conductive length of the coil paired with the trapezoidal or triangular magnet is limited by the shape and placement of the magnet, making it impossible to maximize the design and further weakening the output strength of the Lorentz force.

[0005] The combination of these two issues results in insufficient driving force in existing OIS motors using 3D springs, leading to an imbalance in OIS performance. In shaky shooting scenarios, the OIS bracket and carrier cannot complete displacement compensation in a timely and sufficient manner, significantly reducing the image stabilization effect and even failing to meet the basic requirements for image stability in daily shooting. This seriously affects the overall performance of the camera module and the user experience. Utility Model Content

[0006] The purpose of this invention is to provide a combined image stabilization lens and electronic device with enhanced driving force, which partially solves or alleviates the above-mentioned deficiencies in the prior art and can improve the image stabilization driving force while ensuring miniaturization.

[0007] To solve the aforementioned technical problems, the present invention specifically adopts the following technical solution: The first aspect of this utility model is to provide a combined image stabilization lens with enhanced driving force, including a lens assembly, a carrier for supporting the lens assembly, and a bracket for mounting the carrier; it also includes a driving mechanism, which includes an AF coil, an OIS coil, and a common magnet; the AF coil and the common magnet cooperate to drive the carrier to move relative to the bracket along the optical axis, thereby enabling the lens assembly to autofocus; the OIS coil and the common magnet cooperate to drive the bracket to move relative to the base along an XY plane perpendicular to the optical axis, thereby enabling the lens assembly to achieve image stabilization in the X and Y axes.

[0008] Furthermore, the shared magnet consists of four magnets, arranged in a rectangular pattern in pairs opposite each other along the X and Y axes of the support; the OIS coil consists of four sets of coils arranged on the base directly below the four shared magnets; and the AF coil is fixed on the carrier and located inside the four shared magnets.

[0009] Furthermore, the shared magnet is rectangular, and the OIS coil is hollow and waist-shaped; the magnetic force generated by the two long sides of the OIS of all the shared magnets respectively cooperates with the inner and outer magnetic poles of the magnet to form a resultant force in the same direction.

[0010] Furthermore, the four shared magnets all face the same magnetic pole towards the inside; the AF coil is a ring with four long sides, each of which is matched with one of the four magnets.

[0011] Furthermore, it also includes an AF spring for carrier reset and an OIS spring for support reset.

[0012] Furthermore, the OIS spring includes a spring body parallel to the XY plane, and elastic baffles perpendicular to the spring body are provided at the four corners of the spring body. The elastic baffles act on the side wall of the support to achieve reset.

[0013] Furthermore, the AF coil is connected to the OIS spring, and the OIS spring is provided with pins for connecting to the terminals on the base to power the AF coil.

[0014] Furthermore, the elastic baffle is formed by bending the elastic sheet body twice.

[0015] Furthermore, the AF spring is arranged parallel to the XY plane and is connected to the carrier and the support respectively.

[0016] Furthermore, the bracket is provided with anti-collision protrusions at the four corners that cooperate with the base to limit the bracket in the optical axis direction.

[0017] The present invention also provides an electronic device including the above-described combined image stabilization lens.

[0018] Beneficial effects:

[0019] In this invention, four rectangular shared magnets are arranged in pairs facing each other in a rectangular configuration, maximizing the magnet volume and magnetic flux to provide a stronger magnetic field for the AF and OIS systems. Simultaneously, the uniform magnetic pole design on the inner side of the magnets creates a uniform radial magnetic field, avoiding force loss caused by magnetic field disturbances. The OIS coil is waist-shaped and positioned directly below the magnet, while the AF coil is a ring with four long sides located inside the magnet. Both maximize the effective cutting length of magnetic field lines through shape adaptation. Combined with the strong magnetic field, this increases the driving force, directly improving image stabilization response speed and focusing speed. The OIS coil is parallel to and corresponds to the long sides of the magnet, with the force direction strictly along the X / Y axis, avoiding force loss in traditional diagonal magnet designs. The AF coil experiences forces in the same direction on its four long sides, forming a focusing resultant force and improving force efficiency.

[0020] This invention abandons the traditional design of separate magnets for AF and OIS, instead using a single set of magnets to reduce the number of parts and save internal lens space. The magnet, OIS coil, and AF coil are arranged in layers, with a three-level nested structure of bracket, carrier, and base, eliminating redundant space and effectively controlling axial thickness, making it suitable for miniaturized devices such as smartphones. The OIS spring also functions as a reset device and AF coil power supply, eliminating the need for separate wires or FPCs, further reducing space and weight. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 This is an exploded view of the present invention.

[0023] Figure 2 This is a schematic diagram of the OIS coil and the common magnet.

[0024] Figure 3 This is a schematic diagram of the AF coil and the common magnet.

[0025] Figure 4 A schematic diagram of the carrier and the shared magnet.

[0026] Figure 5 This is a schematic diagram of an OIS shrapnel.

[0027] Figure 6 This is a schematic diagram showing the fit between the base and the bracket.

[0028] Figure 7 This is a schematic diagram of the OIS spring sheet being bent twice.

[0029] Summary of attached labeling and identification: 1-Lens assembly, 2-Housing shell, 3-AF spring, 4-Bracket, 5-Common magnet, 6-Carrier, 7-OIS spring, 8-OIS coil, 9-Base, 10-AF coil, 41-Anti-collision boss, 71-Elastic baffle, 72-Pin, 11-Terminal. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] In this document, suffixes such as "module," "part," or "unit" used to denote elements are used only for the purpose of illustrative purposes and have no specific meaning in themselves. Therefore, "module," "part," or "unit" can be used interchangeably.

[0032] In this document, the terms "upper," "lower," "inner," "outer," "front," "rear," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In this document, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this document, "and / or" includes any and all combinations of one or more of the listed related items.

[0035] In this article, "multiple" means two or more, that is, it includes two, three, four, five, etc.

[0036] Example 1:

[0037] like Figure 1 As shown, this embodiment provides a combined image stabilization lens with enhanced driving force, including a lens assembly, a carrier 6 for supporting the lens assembly, and a bracket 4 for mounting the carrier 6; it also includes a driving mechanism, which includes an AF coil 10, an OIS coil 8, and a common magnet 5; the AF coil 10 and the common magnet 5 cooperate to drive the carrier 6 to move relative to the bracket 4 along the optical axis, thereby enabling the lens assembly to achieve autofocus; the OIS coil 8 and the common magnet 5 cooperate to drive the bracket 4 to move relative to the base 9 along an XY plane perpendicular to the optical axis, thereby enabling the lens assembly to achieve image stabilization in the X and Y axes.

[0038] In this invention, the base 9 provides a fixed reference for the entire lens; the support 4, as the middle layer, supports the carrier 6 and enables its own XY plane movement relative to the base 9 for image stabilization; the carrier 6, as the innermost layer, directly supports the lens assembly and enables its movement relative to the optical axis (Z-axis) of the support 4 for focusing. This hierarchical structure achieves physical isolation and decoupling of Z-axis focusing and XY-axis image stabilization, preventing interference between the two movements.

[0039] This invention employs a drive mechanism where the AF coil 10 and OIS coil 8 share the same magnet. This breaks through the traditional design of independently configured magnets for the AF and OIS systems in image stabilization lenses, avoiding the problems of dispersed magnetic circuits and large space occupation caused by traditional solutions where AF and OIS each use a separate set of magnets. The shared magnet 5 in this invention provides a magnetic field source for both AF and OIS, simplifying the structure, reducing the number of magnets and assembly complexity, and enhancing magnetic field strength through a centralized magnetic circuit. Within the same volume, the shared magnet 5 can be designed with a larger volume or higher magnetic energy product, increasing the magnetic field density.

[0040] The AF coil 10 is fixed to the carrier 6. When energized, it experiences a Lorentz force along the optical axis, which pushes the carrier 6 relative to the support 4 to move along the Z-axis, thus achieving focusing. The OIS coil 8 is fixed to the base 9. By controlling the direction and magnitude of the current in the coils along the X and Y axes, a Lorentz force along the X or Y axis can be generated, driving the support 4 to move relative to the base 9 in the XY plane to compensate for shooting shake.

[0041] Specifically, such as Figures 2-4As shown, in this embodiment, there are four shared magnets 5, arranged in a rectangular pattern in pairs opposite each other along the X and Y axes of the support 4; the OIS coils 8 are four sets distributed on the base 9 directly below the four shared magnets 5; the AF coils 10 are fixed on the carrier 6 and located inside the four shared magnets 5. More specifically, the shared magnets 5 are rectangular, and the OIS coils 8 are hollow and waist-shaped; the magnetic forces generated by the two long sides of the OIS of all the shared magnets 5 respectively cooperate with the inner and outer magnetic poles of the magnets to form a resultant force in the same direction. In addition, the four shared magnets 5 all have the same magnetic pole facing inward; the AF coils 10 are rings with four long sides, each of which cooperates with one of the four magnets.

[0042] In this embodiment, the bracket 4 is rectangular. Four magnets are fixed at the midpoints of the four sides of the bracket 4, with two magnets facing each other along the X-axis and two facing each other along the Y-axis, so that the magnetic field forms a symmetrical cross-shaped distribution in the XY plane. Compared with the diagonal arrangement of magnets at the four corners in traditional image-stabilized lenses, the rectangular arrangement of magnets can generate a linear magnetic field along the X and Y axes, rather than a tilted magnetic field along the diagonal direction, thus avoiding the force decomposition loss caused by the mismatch between the magnetic field direction and the driving demand direction in traditional designs.

[0043] The four magnets are positioned in pairs, with the magnetic fields of the two magnets in opposite directions along the X-axis and the same applies along the Y-axis. When the OIS coil 8 is energized, the two pairs of coils generate equal and opposite driving forces, making the translation of the bracket 4 in the XY plane smoother and preventing the bracket 4 from tilting or rotating due to excessive force on one side, thus ensuring the accuracy of image stabilization compensation.

[0044] The rectangular arrangement distributes the magnets along the four sides of the support, maximizing the use of the outer perimeter space of the support and allowing the magnets to be designed as larger rectangular structures (with lengths that fit the four sides of the support). Compared to the smaller magnets at the four corners, the magnets have higher magnetic flux, providing a magnetic field basis for enhanced driving force.

[0045] Four sets of OIS coils 8 are located directly below the four magnets. The OIS coils 8 are designed as hollow, waist-shaped structures, with semicircular ends and a parallel long side in the middle. The two long sides of the waist-shaped coil correspond parallel to the two long sides of the rectangular magnets. Figure 2 As shown, taking the X-axis + direction as an example, the inner side of the magnet on the X-axis is the N pole and the outer side is the S pole. The current directions of the inner and outer long sides of the OIS coil 8 are opposite, so that the two long sides of the OIS coil 8 generate a thrust in the X+ direction with the two poles of the common magnet 5, thereby causing the support 4 to move in the X+ direction.

[0046] The AF coil 10 is fixed to the carrier 6 and located inside the four shared magnets 5. A radial magnetic field is formed inside the four shared magnets 5, with the inner side of the magnet being the N pole and the outer side the S pole, and the magnetic field direction pointing from the inside to the outside. The AF coil 10 is positioned around the carrier 6 inside the magnets, and its current direction is designed to be perpendicular to the radial magnetic field. According to the left-hand rule, this generates a Lorentz force along the optical axis. Because the coil is located in the strong magnetic field region inside the magnets, and the coil's circumference can be adapted to the inner contour of the four magnets, the length of the effective cut magnetic field lines is maximized, directly improving the driving force for AF focusing.

[0047] In addition, the AF coil 10 is located inside the common magnet 5, and the OIS coil 8 is located on the common magnet 5. The two are spatially layered, avoiding electromagnetic interference between the coils and ensuring independent control of AF focusing and OIS image stabilization. The bracket 4 supports the common magnet 5, the carrier 6 supports the AF coil 10, and the base 9 supports the OIS coil 8. The three-layer structure is tightly nested with no redundant space, which can meet the stringent requirements of miniaturization of lens modules in consumer electronic devices such as smartphones.

[0048] like Figure 5 As shown, this embodiment also includes an AF spring 3 for resetting the carrier 6 and an OIS spring 7 for resetting the bracket 4. The function of the AF spring 3 and the OIS spring 7 is to return the moving parts (carrier 6 / bracket 4) to their initial positions through the elastic deformation rebound force after the driving current disappears, ensuring that the lens maintains a reference posture in the non-working state or after the driving ends, and providing a stable starting point for the next focusing / image stabilization.

[0049] Specifically, the OIS spring 7 includes a spring body parallel to the XY plane. Elastic baffles 71, perpendicular to the spring body, are provided at the four corners of the spring body. These elastic baffles 71 act on the sidewall of the support 4 to achieve repositioning. The elastic baffles 71 extend perpendicularly to the spring body along the Z-axis and act directly on the sidewall of the support 4. When the support 4 is displaced in the XY plane, the corresponding elastic baffle 71 is compressed and deformed. Its rebound force acts directly on the sidewall of the support 4 in the opposite direction of displacement, forming a directional repositioning force. Compared to the oblique tensile force generated by the bending of the body in traditional springs, the method of acting perpendicular to the sidewall allows the repositioning force to be output 100% along the XY axis, with no redundant force components, thus improving repositioning accuracy.

[0050] The elastic baffles 71 at the four corners of the spring body are symmetrically distributed, with two elastic baffles 71 symmetrically arranged on each side, so that a balanced restoring force can be obtained in the four directions of X+, X-, Y+ and Y-, and the support 4 is prevented from deviating.

[0051] In addition, to further reduce weight, several weight-reducing holes can be made on the elastic baffle 71 to reduce the overall weight of the OIS spring 7.

[0052] like Figure 7 The elastic baffle 71 is formed by bending the spring body twice. Specifically, it is first bent at approximately 45° to the spring body at point P1, and then bent at approximately 45° at point P2. After the two bending, a buffer portion is formed between the elastic baffle 71 and the spring body.

[0053] Traditional vertically bent elastic baffles concentrate stress at the bend during deformation, making them prone to fatigue fracture. The buffer section formed by two 45° bends, however, effectively adds a transition zone for deformation, resulting in a more even stress distribution. When the elastic baffle is compressed by the support, the buffer section deforms first, dispersing stress and preventing excessive stress on a single bend point, thereby improving the fatigue life of the elastic baffle.

[0054] The presence of the buffer section allows the elastic baffle 71 more flexible movement when interacting with the sidewall of the support. A single bend restricts the baffle's range of motion, while two bends allow for slight twisting or oscillation in the X / Y plane. This allows the baffle to more gently contact and apply a restoring force when the support experiences a slight shift, preventing posture disturbances caused by rigid collisions. Simultaneously, the release of the restoring force is more linear because the deformation of the buffer section is gradual, resulting in a smoother restoring process and reducing excessive rebound.

[0055] The AF coil 10 is connected to the OIS spring 7, which has pins 72 for connecting to terminals 11 on the base 9 to power the AF coil 10. In traditional designs, the AF coil 10 requires a separate wire or flexible printed circuit board (FPC) to connect to terminals 11 on the base 9. These wires are prone to interference with moving parts and occupy additional space. The OIS spring, made of conductive metal, combines elastic reset and conductivity, directly connecting the AF coil 10 to terminals 11 on the base 9, eliminating the need for a separate wire.

[0056] The AF spring 3 is arranged parallel to the XY plane and is connected to the carrier 6 and the support 4 respectively. When the carrier 6 moves up and down along the Z-axis, the AF spring 3 is stretched or compressed, and the deformation direction is along the Z-axis. Its rebound force acts directly on the carrier 6 along the Z-axis direction, which is completely consistent with the driving force direction of the AF coil 10, ensuring that the lens assembly always moves along the optical axis during the focusing process.

[0057] The primary working motion of bracket 4 is anti-vibration displacement along the XY plane. However, under extreme conditions such as equipment drops or severe vibrations, it may experience offset in the Z-axis direction. If the offset is too large, bracket 4 may rigidly collide with the base 9, causing damage to the precision components on bracket 4. To solve this problem, such as... Figure 6As shown, in this embodiment, the bracket 4 is provided with anti-collision protrusions 41 at the four corners that cooperate with the base 9 to limit the bracket 4 in the optical axis direction. When the bracket 4 moves toward the base 9 due to accident, the anti-collision protrusions 41 can contact the base 9 in advance to support the entire bracket 4 and prevent the bracket 4 body from colliding with the base 9 and causing damage.

[0058] Understandably, in order to prevent dust and other foreign objects from entering the lens, a housing 2 that is fastened to the base 9 can also be used to shield the internal parts.

[0059] Example 2:

[0060] This embodiment also provides an electronic device, including the above-described combined image stabilization lens.

[0061] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0062] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A combined image stabilization lens with enhanced driving force, characterized in that: The device includes a lens assembly, a carrier for supporting the lens assembly, and a bracket for mounting the carrier; it also includes a drive mechanism, which includes an AF coil, an OIS coil, and a common magnet; the AF coil and the common magnet work together to drive the carrier to move relative to the bracket along the optical axis, thereby enabling the lens assembly to autofocus; the OIS coil and the common magnet work together to drive the bracket to move relative to the base along an XY plane perpendicular to the optical axis, thereby enabling the lens assembly to achieve image stabilization in the X and Y axes.

2. The combined image stabilization lens with enhanced driving force according to claim 1, characterized in that: The common magnet consists of four magnets, arranged in a rectangular pattern in pairs opposite each other along the X and Y axes of the support. The OIS coil consists of four sets of coils located on the base directly below the four common magnets. The AF coil is fixed to the carrier and located inside the four common magnets.

3. The combined image stabilization lens with enhanced driving force according to claim 2, characterized in that: The shared magnet is rectangular, and the OIS coil is hollow and waist-shaped; the magnetic force generated by the two long sides of the OIS coil cooperates with the inner and outer magnetic poles of the shared magnet to form a resultant force in the same direction.

4. The combined image stabilization lens with enhanced driving force according to claim 2, characterized in that: The four shared magnets all face inwards and share the same magnetic pole; the AF coil is a ring with four long sides, each of which is matched with one of the four shared magnets.

5. A combined image stabilization lens with enhanced driving force according to claim 1, characterized in that: It also includes an AF spring for carrier reset and an OIS spring for support reset.

6. A combined image stabilization lens with enhanced driving force according to claim 5, characterized in that: The OIS spring includes a spring body parallel to the XY plane, and elastic baffles perpendicular to the spring body are provided at the four corners of the spring body. The elastic baffles act on the side wall of the support to achieve reset.

7. A combined image stabilization lens with enhanced driving force according to claim 5, characterized in that: The AF coil is connected to the OIS spring, and the OIS spring is provided with pins for connecting to the terminals on the base to power the AF coil.

8. A combined image stabilization lens with enhanced driving force according to claim 6, characterized in that: The elastic baffle is formed by bending the elastic body twice.

9. A combined image stabilization lens with enhanced driving force according to claim 1, characterized in that: The bracket has anti-collision protrusions at its four corners that cooperate with the base to limit the bracket in the optical axis direction.

10. An electronic device, characterized in that: Includes the combined image stabilization lens as described in any one of claims 1 to 9.

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