Lens driving device base and lens driving device

Abstract

The utility model relates to the technical field of optical anti-shake, in particular to a lens driving device base and a lens driving device, the lens driving device base comprises a body, a circuit layer and an OIS coil, the circuit layer is embedded in the body, the OIS coil is arranged in the body and located above the circuit layer, the OIS coil is electrically connected with the circuit layer, the body is provided with a through hole, and the through hole is communicated with the circuit layer. The through hole at least exposes part of the circuit layer; in the injection molding process of the base, the circuit layer is directly embedded in the base in advance, and the OIS coil is synchronously welded on the circuit layer and then is subjected to injection molding, so that additional parts do not need to be designed to provide protection for the coil, the condition that the OIS coil is collided to cause skin breakage is avoided on the premise that the overall thickness of the base is not increased, and the service life of the OIS coil is prolonged. And the service life of the lens driving device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of optical image stabilization technology, and in particular to a lens drive device base and a lens drive device. Background Technology

[0002] The demand for camera functions in portable electronic devices (such as tablets and smartphones) continues to grow rapidly. To meet the diverse imaging requirements of users, a stabilization motor is typically added to the camera module as a lens drive to compensate for motion during shooting, thereby improving image quality.

[0003] Currently, most image stabilization motors on the market use a coil + magnet driving method. However, in a conventional layout, the magnet and coil may collide, causing the coil to break. Chinese patent CN218767525U discloses a lens driving device that uses a limiting block and a winding block on the base to protect the coil. However, this solution undoubtedly increases the thickness of the base, leading to an increase in the overall size of the image stabilization motor.

[0004] It should be noted that the information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] To address the technical problems of conventional image stabilization motor bases failing to provide protection for the coil or having excessive thickness, this utility model provides a lens drive device base. The lens drive device base includes a body, a circuit layer, and an OIS coil. The circuit layer is embedded inside the body, and the OIS coil is disposed inside the body and above the circuit layer. The OIS coil is electrically connected to the circuit layer. The body has through holes, and the through holes expose at least a portion of the circuit layer.

[0006] Furthermore, the circuit layer has a plurality of first solder joints and a plurality of second solder joints, the through-holes expose the first solder joints, and the OIS coil is electrically connected to the plurality of second solder joints.

[0007] Furthermore, the OIS coil and the second solder joint are coated with a heat insulation layer.

[0008] Furthermore, the OIS coil includes at least two oppositely arranged first coils and two oppositely arranged second coils, the two first coils being electrically connected to the second solder joint, and the two second coils being electrically connected to the second solder joint.

[0009] Furthermore, the lens driving device base also includes a first IC and a second IC, which are disposed inside the body and located below the circuit layer, and are electrically connected to the circuit layer respectively.

[0010] Furthermore, this utility model also provides a lens driving device, comprising the lens driving device base described in any one of the above claims.

[0011] Furthermore, the lens driving device also includes an OIS frame and a lens mount. The OIS frame is movably disposed on the upper surface of the lens driving device base, and the lens mount is movably disposed in the OIS frame. The lens mount is electrically connected to the circuit layer.

[0012] Furthermore, the OIS frame is provided with a number of magnets, which are distributed around the OIS frame.

[0013] Furthermore, the mirror mount is provided with an AF coil, which is sleeved on the mirror mount and electrically connected to the circuit layer.

[0014] Furthermore, the lens driving device also includes a first spring, a second spring, and a suspension wire. The first spring is located between the OIS frame and the lens driving device base, and is connected to the OIS frame and the lens mount respectively. The second spring is disposed above the OIS frame, and is connected to the OIS frame and the lens mount respectively. The second spring is electrically connected to the AF coil.

[0015] The two ends of the suspension wire are electrically connected to the first solder joint and the second spring piece, respectively.

[0016] Based on the above, the lens driving device base and lens driving device provided by this utility model, compared with the prior art, directly embed the circuit layer inside the base during the injection molding process of the base, and simultaneously weld the OIS coil onto the circuit layer before injection molding. There is no need to design additional components to protect the coil. Without increasing the overall thickness of the base, it avoids the OIS coil from being damaged by bumps, thus improving the service life of the lens driving device. Attached Figure Description

[0017] 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. 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 creative effort. Unless otherwise specified, the positional relationships shown in the drawings in the following description are based on the direction in which the components are drawn in the figures.

[0018] Figure 1 This is an exploded structural diagram of a lens driving device according to an embodiment of the present invention;

[0019] Figure 2 This is an exploded structural diagram of a lens driving device base according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the lower surface structure of the circuit layer provided in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of an OIS frame provided in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of a mirror mount structure provided in one embodiment of the present invention.

[0023] Figure label:

[0024] 10-Lens drive unit base; 20-OIS frame; 30-Lens mount

[0025] 40-Magnet 50-AF Coil 60-First Spring

[0026] 70-Second shrapnel 80-Suspension wire 90-Outer cover

[0027] 11-Body; 12-Linear Layer; 13-OIS Coil

[0028] 14-First IC 15-Second IC 111-Through Hole

[0029] 121 - First solder joint; 122 - Second solder joint; 123 - Pin

[0030] 131 - First coil; 132 - Second coil Detailed Implementation

[0031] 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 embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation 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, or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof mean "at least comprising."

[0033] Please see Figure 1 and Figure 2 , Figure 1 This is an exploded structural diagram of a lens driving device according to an embodiment of the present invention; Figure 2 This is an exploded structural diagram of a lens driving device base according to an embodiment of the present invention.

[0034] To address the technical problems of conventional image stabilization motor bases failing to provide protection for the coil or having excessive thickness, or to achieve at least one or more of the aforementioned advantages, an embodiment of this utility model provides a lens drive device base 10. As shown in the figure, the lens drive device base 10 includes a body 11, a circuit layer 12, and an OIS coil 13.

[0035] The circuit layer 12 and the OIS coil 13 are pre-embedded inside the body 11, and the OIS coil 13 is electrically connected to the circuit layer 12. The circuit layer 12 can be a stamped metal circuit. The circuit layer 12 has a plurality of first solder joints 121 and second solder joints 122. The OIS coil 13 is electrically connected to the plurality of second solder joints 122. Preferably, the circuit layer 12 also has pins 123 to realize the overall circuit lead-out of the power supply and signal of the lens drive device base 10.

[0036] In practice, following the direction shown in the diagram, the metal wires are stamped to form a circuit layer 12. The OIS coil 13 is then fixed to the upper surface of the circuit layer 12 using methods such as dispensing adhesive, and the OIS coil 13 is soldered to several second solder points 122. Subsequently, the circuit layer 12 and the OIS coil 13 are injection molded as a whole to form the lens drive device base 10.

[0037] Since the OIS coil 13 is directly embedded inside the body 11, the OIS coil 13 is protected without the need to design additional components or structures to protect it. Without increasing the thickness, the OIS coil 13 is protected from being damaged by bumps, thus improving the service life of the lens drive device.

[0038] Preferably, a heat insulation layer (not shown) can be coated on the OIS coil 13 and the second solder joint 122 to prevent the high temperature during the injection molding process from causing the solder joint between the OIS coil 13 and the second solder joint 122 to become loose or have poor soldering.

[0039] Of course, the circuit layer 12 is not limited to stamped metal circuits, but can also be replaced by flexible circuit boards, and there is no restriction on this.

[0040] Furthermore, such as Figure 3 As shown, the lens drive device base 10 also includes a first IC 14 and a second IC 15. The first IC 14 and the second IC 15 are pre-embedded inside the body 11 and located below the circuit layer 12. The first IC 14 and the second IC 15 are electrically connected to the circuit layer 12, respectively.

[0041] In a specific implementation, the OIS coil 13 includes at least two oppositely arranged first coils 131 and two oppositely arranged second coils 132. The two first coils 131 are electrically connected to the circuit layer 12 and the first IC 14 through the second solder joint 122. The first IC 14 can control the two first coils 131 to generate a magnetic field.

[0042] The two second coils 132 are electrically connected to the circuit layer and the second IC 15 via the second solder joint 122. The second IC 15 can control the two second coils 132 to generate a magnetic field, which facilitates the normal operation of the anti-shake function.

[0043] Based on the above, a through-hole 111 can be formed on the body 11. The through-hole 111 exposes at least a portion of the circuit layer 12. Specifically, the through-hole 111 exposes the first solder joint 121 of the circuit layer 12, facilitating soldering during subsequent manufacturing and assembly processes.

[0044] Preferably, the height of the first solder joint 121 is lower than the height of the second solder joint 122 to improve strength and prevent damage.

[0045] Please combine Figure 1 See Figure 4 In some preferred embodiments, the present invention also provides a lens driving device, comprising the lens driving device base 10, OIS frame 20 and lens mount 30 described above.

[0046] With reference to the direction shown in the figure, the OIS frame 20 is movably mounted on the upper surface of the lens drive device base 10. In specific implementation, the OIS frame 20 can move relative to the lens drive device base 10 along the X-axis and / or Y-axis. The OIS frame 20 is provided with a plurality of magnets 40. The plurality of magnets 40 are distributed on the inner circumference of the OIS frame 20. Preferably, the number of magnets 40 is four, which are respectively arranged on the inner circumference of the four sides of the OIS frame 20.

[0047] When the two first coils 131 and / or the two second coils 132 are energized, they generate an Ampere force under the magnetic field of the magnet 40 to cut magnetic field lines, thereby driving the OIS frame 20 to move relative to the lens drive device base 10 along the X-axis and / or Y-axis, achieving the purpose of image stabilization and improving image quality.

[0048] The mirror mount 30 is movably mounted within the OIS frame 20. In practice, the mirror mount 30 can move relative to the OIS frame 20 along the Z-axis. Figure 5 As shown, an AF coil 50 is provided on the mirror mount 30. Specifically, the AF coil 50 is a toroidal coil. The AF coil 50 is sleeved on the mirror mount 30. The AF coil 50 is electrically connected to the circuit layer 12.

[0049] When the AF coil 50 is energized, it generates a magnetic field. Under the influence of the magnetic field of the magnet 40, it generates an Ampere force to cut the magnetic field lines, thereby pushing the lens mount 30 to move relative to the OIS frame 20 along the Z-axis to achieve focusing and zooming functions and improve image quality.

[0050] Based on the above, the lens driving device may further include a first spring 60, a second spring 70, and a suspension wire 80. In specific implementation, the first spring 60 is located between the OIS frame 20 and the lens driving device base 10, and the first spring 60 is connected to both the OIS frame 20 and the lens mount 30. The first spring 60 can provide a restoring force for the lens mount 30, while making the movement of the lens mount 30 more linear, which is beneficial to the normal realization of focusing and zoom functions.

[0051] The second spring 70 is positioned above the OIS frame 20. The second spring 70 is connected to both the OIS frame 20 and the lens mount 30. The second spring 70 is electrically connected to the AF coil 50. The second spring 70 also provides a restoring force to the lens mount 30, and simultaneously leads the power and signal lines of the AF coil 50 to the second spring 70.

[0052] One end of the suspension wire 80 is electrically connected to the first solder joint 121, and the other end is electrically connected to the second spring 70, thereby realizing the electrical connection between the AF coil 50 and the circuit layer 12.

[0053] In some embodiments, the image stabilization motor may also include an outer cover 90. The outer cover 90 covers the lens drive base 10.

[0054] In summary, the lens driving device base and lens driving device provided by this utility model, compared with the prior art, directly embed the circuit layer inside the base during the injection molding process, and simultaneously weld the OIS coil onto the circuit layer before injection molding. There is no need to design additional components to protect the coil. Without increasing the overall thickness of the base, it avoids the OIS coil from being damaged by bumps, thus improving the service life of the lens driving device.

[0055] Although this document uses terms such as "body" and "OIS coil" frequently, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0056] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of this utility model can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lens driving device base, characterized by: The body; The circuit layer is embedded inside the body; The OIS coil is arranged inside the body and above the circuit layer, and is electrically connected to the circuit layer respectively; The body is provided with a through hole, and the through hole exposes at least part of the circuit layer. The circuit layer has a plurality of first solder joints and a plurality of second solder joints, and the through hole exposes the first solder joints, and the OIS coil is electrically connected to the plurality of second solder joints.

2. The lens driving device mount according to claim 1, characterized by: The OIS coil and the second solder joint are coated with a thermal insulation layer.

3. The lens driving device mount according to claim 2, characterized by: The OIS coil at least includes two oppositely arranged first coils and two oppositely arranged second coils, and the two first coils are electrically connected to the second solder joint, and the two second coils are electrically connected to the second solder joint.

4. The lens driving device mount according to claim 2, characterized by: The lens driving device base further includes a first IC and a second IC, which are arranged inside the body and below the circuit layer, and the first IC and the second IC are electrically connected to the circuit layer respectively.

5. The lens driving device mount according to claim 1, wherein: The lens driving device base includes the lens driving device base.

6. A lens driving apparatus characterized by comprising: The lens driving device further includes an OIS frame and a lens seat, the OIS frame is movably arranged on the upper surface of the lens driving device base, the lens seat is movably arranged in the OIS frame, and the lens seat is electrically connected to the circuit layer.

7. The lens driving device according to claim 6, wherein: The OIS frame is provided with a plurality of magnets, and the plurality of magnets are distributed around the OIS frame.

8. The lens driving device according to claim 7, wherein: The lens seat is provided with an AF coil, the AF coil is sleeved on the lens seat, and the AF coil is electrically connected to the circuit layer.

9. The lens driving device according to claim 7, wherein: The lens driving device further includes a first elastic sheet, a second elastic sheet and a suspension wire, the first elastic sheet is located between the OIS frame and the lens driving device base, the first elastic sheet is connected to the OIS frame and the lens seat respectively, the second elastic sheet is arranged above the OIS frame, the second elastic sheet is connected to the OIS frame and the lens seat respectively, and the second elastic sheet and the AF coil are electrically connected; 10. The lens driving device according to claim 9, wherein: The two ends of the suspension wire are electrically connected to the first solder joint and the second elastic sheet respectively. ​

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