Optical driving base

Abstract

The utility model discloses an optical driving base, which comprises a plastic body, a metal circuit arranged on the plastic body, a coil and an electronic element, the coil and the electronic element are electrically connected with the metal circuit, and a magnetic isolation sheet is arranged between the coil and at least part of the metal circuit. According to the optical driving base, the magnetic isolation sheet is arranged between the coil and the metal circuit, the magnetic isolation sheet has the effect of shielding a magnetic field, and the magnetic isolation sheet can prevent or reduce magnetic interference of the coil on the metal circuit used for transmitting signals, so that the influence on the use performance of an electronic element is prevented or reduced, and the service life of the electronic element is prolonged. And timely and accurate signal transmission of the electronic element is ensured, so that the driving precision and stability of the optical element are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera equipment technical field especially relates to an optical drive base. BACKGROUND

[0002] The camera module includes an optical drive base for driving optical elements such as lenses or prisms to move, the optical elements are arranged on another cooperating assembly cooperating with the optical drive base, the coil on the optical drive base cooperates with the magnet on the other cooperating assembly to generate driving force to directly or indirectly drive the optical elements to move, and the real-time position of the optical elements is detected and determined through the electronic elements on the optical drive base, so as to change the current of the coil to make the optical elements accurately reach the target position. However, when the coil is connected with the current and generates a magnetic field with the corresponding magnet, the magnetic field is easy to overflow and cause magnetic interference to the metal circuit around the coil for signal transmission, thereby affecting the use performance of the electronic elements connected to the metal circuit.

[0003] Therefore, the existing optical drive base needs to be improved. SUMMARY

[0004] The utility model discloses a kind of optical drive base, which can prevent or reduce the magnetic interference of coil to metal circuit for signal transmission, to prevent or reduce the use performance of electronic element, and then ensure the accuracy and stability of the driving of optical element.

[0005] The utility model discloses the following technical solutions to achieve the purpose:

[0006] An optical drive base comprises a plastic body, a metal circuit arranged on the plastic body, and a coil and an electronic element electrically connected to the metal circuit, and a magnetic shielding sheet is arranged between the coil and at least part of the metal circuit.

[0007] Preferably, in the length and width directions of the coil, the size of the magnetic shielding sheet is greater than the size of the coil, so that the edges of the magnetic shielding sheet protrude beyond the corresponding edges of the coil; and / or,

[0008] The projection of the metal circuit and the coil on the same plane along the thickness direction of the coil at least partially overlaps.

[0009] Preferably, the plastic body is provided with a receiving groove for accommodating the coil, the magnetic shielding sheet is arranged on the bottom surface of the receiving groove or flush with the bottom surface of the receiving groove, and the coil is arranged in close contact with the magnetic shielding sheet.

[0010] Preferably, the magnetic shielding sheet is attached to the bottom surface of the receiving groove; or,

[0011] The edge of the magnetic isolation sheet is embedded in the plastic body, and the position corresponding to the coil of the magnetic isolation sheet is exposed to the accommodating groove.

[0012] Preferably, the magnetic isolation sheet is integrally embedded in the plastic body, the coil is arranged apart from the magnetic isolation sheet, the plastic body is provided with an accommodating groove for accommodating the coil, and the coil is attached to the bottom surface of the accommodating groove.

[0013] Preferably, at least one side of the magnetic isolation sheet facing the metal circuit is provided with an insulating layer for preventing short circuit between the magnetic isolation sheet and the metal circuit; and / or,

[0014] At least one side of the metal circuit facing the magnetic isolation sheet is provided with an insulating layer for preventing short circuit between the magnetic isolation sheet and the metal circuit.

[0015] Preferably, the insulating layer is at least one of a thermosetting adhesive coating, an ink coating, and a Teflon coating.

[0016] Preferably, the bottom surface of the accommodating groove is provided with a plurality of adhesive reservoirs for containing adhesive.

[0017] When the magnetic isolation sheet is connected to the bottom surface of the accommodating groove by the adhesive, at least part of the adhesive is filled in the adhesive reservoirs to increase the contact area between the adhesive and the magnetic isolation sheet.

[0018] When the coil is connected to the bottom surface of the accommodating groove by the adhesive, at least part of the adhesive is filled in the adhesive reservoirs to increase the contact area between the adhesive and the coil.

[0019] Preferably, the plastic body includes a bottom portion and a side portion arranged at an angle with the bottom portion, the coil is located at the bottom portion of the plastic body or the side portion of the plastic body, and the electronic component is located at the bottom portion of the plastic body or the side portion of the plastic body.

[0020] Preferably, the plastic body is provided with an accommodating groove for accommodating the coil, the accommodating groove is located at the bottom portion of the plastic body or the side portion of the plastic body, and the electronic component is located at the accommodating groove or a position other than the accommodating groove.

[0021] When the electronic component is located at the accommodating groove, the bottom surface of the accommodating groove is further recessed to form a receiving groove for accommodating the electronic component, the bottom surface of the receiving groove is lower than the position where the magnetic isolation sheet is located, the coil includes a main body portion and a lead portion, the electronic component is located in a cavity formed around the main body portion of the coil, and the metal circuit is provided with a connecting portion exposed to the receiving groove for connecting with the electronic component.

[0022] Preferably, a winding post is further included for positioning the coil, and the magnetic isolation sheet is provided with a first hollow part corresponding to the position of the winding post to expose the winding post or the winding post is directly arranged on the magnetic isolation sheet; and / or,

[0023] The magnetic isolation sheet is provided with a second hollow part corresponding to the position of the electronic element to expose the electronic element; and / or,

[0024] The magnetic isolation sheet is at least one of copper, aluminum, nickel alloy, ferrite material and silicon steel sheet.

[0025] Preferably, the metal circuit includes at least a first branch connected with the coil and a second branch connected with the electronic element, the second branch includes a signal branch for signal transmission and passing through the coil along at least one side of the thickness direction of the coil, and the magnetic isolation sheet is located between the coil and the signal branch along the thickness direction of the coil for shielding or reducing the magnetic interference of the coil on the signal branch.

[0026] Compared with the prior art, the utility model has at least the following beneficial effects:

[0027] The optical drive base of the utility model, by setting the magnetic isolation sheet between the coil and at least part of the metal circuit, the magnetic isolation sheet has the effect of shielding the magnetic field, and the magnetic isolation sheet can prevent or reduce the magnetic interference of the coil on the metal circuit for signal transmission, thereby preventing or reducing the influence on the use performance of the electronic element, ensuring the timely and accurate signal transmission of the electronic element, and further ensuring the precision and stability of the driving of the optical element. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is an exploded schematic view of an optical drive base of an embodiment of the utility model.

[0029] Figure 2 is Figure 1 the local enlarged view of A in figure

[0030] Figure 3 is Figure 1 the local enlarged view of B in figure

[0031] Figure 4 is a three-dimensional structure schematic view of an optical drive base of an embodiment of the utility model.

[0032] Figure 5 is a plane structure schematic view of an optical drive base of an embodiment of the utility model.

[0033] Figure 6 is a sectional view along Figure 5 A-A line in figure

[0034] Figure 7 is Figure 6 is a partial enlarged view of C in the middle.

[0035] Figure 8 is a perspective structural schematic view of another optical drive base according to an embodiment of the present application.

[0036] Figure 9 is an exploded schematic view of another optical drive base according to an embodiment of the present application.

[0037] Figure 10 is Figure 9 is a partial enlarged view of D in the middle.

[0038] Figure 11 is a plan structural schematic view of another optical drive base according to an embodiment of the present application.

[0039] Figure 12 is a cross-sectional schematic view along Figure 11 B-B line in the middle.

[0040] Figure 13 is Figure 12 is a partial enlarged view of E in the middle.

[0041] In the figure: 100, optical drive base; 1, plastic body; 11, accommodating groove; 111, glue storage groove; 112, containing groove; 12, bottom; 13, side; 14, winding column; 2, metal circuit; 21, first end; 211, solder leg; 212, connecting part; 22, second end; 23, first branch; 24, second branch; 241, signal branch; 3, coil; 31, main body part; 311, cavity; 32, lead part; 4, electronic element; 5, magnetic isolation sheet; 51, insulation layer; 52, first hollow part; 53, second hollow part; 54, third hollow part. DETAILED DESCRIPTION

[0042] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and fully convey the inventive aspects of example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and descriptions of the same elements will not be repeated.

[0043] The words expressing position and direction described in the present application are explained by taking the drawings as an example, but changes can also be made as needed, and the changes made are included in the protection scope of the present application.

[0044] Referring to Figures 1 to 13The utility model provides a kind of optical drive pedestal 100, this optical drive pedestal 100 is applied in the optical drive mechanism of camera module, and it is used to drive lens assembly or aperture assembly etc.

[0045] Specifically, referring to Figure 1 、 Figure 2 、 Figure 4 、 Figure 8 、 Figure 9 The plastic body 1 can be formed by injection molding, at least part of the metal circuit 2 can be embedded in the plastic body 1, the number of metal circuits 2 can be one or more, and the metal circuit 2 can be exposed from the plastic body 1. In this embodiment, the number of metal circuits 2 is multiple, the metal circuit 2 has a first end 21 and a second end 22, the first end 21 of the metal circuit 2 can be electrically connected with the coil 3 and the electronic element 4, more specifically, part of the first end 21 of the metal circuit 2 can form a soldering leg 211 and be electrically connected with the coil 3, part of the first end 21 of the metal circuit 2 can form a connecting part 212 and be electrically connected with the electronic element 4, the second end 22 of the metal circuit 2 can be electrically connected with external components, the coil 3 and the electronic element 4 can be electrically connected or communicate between the metal circuit 2 and external components (not shown), which can be a flexible circuit board or a printed circuit board (PCB). Of course, the coil 3, the electronic element 4 and the external components can also be electrically connected with the positions between the first end 21 and the second end 22 of the metal circuit 2. The metal circuit 2 can also be electrically connected with other components (not shown) in the optical drive pedestal 100, and the electronic element 4 can be electrically connected or communicate between the metal circuit 2 and other components in the optical drive pedestal 100.

[0046] The coil 3 can include a main body part 31 and a lead part 32, and the lead part 32 of the coil 3 can be electrically connected with the solder leg 211 formed by the first end 21 of the metal circuit 2. The lead part 32 of the coil 3 and the solder leg 211 of the metal circuit 2 can be electrically connected by conductive glue or solder, so that the connection between the lead part 32 of the coil 3 and the metal circuit 2 is more stable. The coil 3 can cooperate with a magnet on another cooperating assembly (not shown) to generate a magnetic field and form a driving force to drive the optical drive base 100 to move relative to the other cooperating assembly, thereby driving the optical element to move. In the present embodiment, the optical element is arranged on the other cooperating assembly.

[0047] The electronic element 4 can be a sensor element or an integrated circuit of an integrated sensor element, etc. The sensor element in the present embodiment can be a Hall sensor (HS) or an integrated circuit (IC) of an integrated Hall sensor, can also be a tunnel magneto resistance sensor (TMR Sensor), and can also be a capacitance IC for detecting the moving position of the optical element by detecting the change amount of the capacitance value. The electronic element 4 can be used to detect the relative position of the optical drive base 100 and the other cooperating assembly to control the position of the optical element, thereby achieving focusing, zooming or anti-shake functions. Of course, the electronic element 4 can also be other types of electronic devices. The connecting part 212 of the electronic element 4 and the metal circuit 2 can be electrically connected by conductive glue or solder, so that the connection between the electronic element 4 and the metal circuit 2 is more stable.

[0048] The metal circuit 2 can be produced by punching, laser cutting, etc. In production, the metal circuit 2 is preferably obtained by punching, and the metal circuit 2 is connected with a material belt (not shown), which is preferably punched together with the metal circuit 2. The material belt can connect multiple metal circuits 2 together, which facilitates batch injection molding of the metal circuit 2 and the plastic body 1, facilitates automatic production, and can simultaneously produce multiple optical drive bases 100, thereby improving production efficiency. At the same time, the material belt has a positioning effect on the metal circuit 2, and can further avoid the position of the metal circuit 2 on the plastic body 1 from being deviated during the injection molding process.

[0049] Referring to Figure 1 , Figure 7 , Figure 9 , Figure 13A magnetic shielding sheet 5 can be arranged between the coil 3 and the at least partial metal circuit 2, the magnetic shielding sheet 5 has a shielding effect on a magnetic field, and is used to shield or reduce the magnetic field generated by the coil 3 from overflowing and causing magnetic interference to the metal circuit 2, especially to the metal circuit 2 used for signal transmission. The magnetic shielding sheet 5 can be in a flat plate shape, and is preferably arranged in parallel with the coil 3. In some embodiments, the magnetic shielding sheet 5 can also be in other shapes, which can be set according to actual needs.

[0050] The magnetic shielding sheet 5 is preferably made of a material with high structural strength and is not easy to deform, so as to ensure that the magnetic shielding sheet 5 has high structural strength. The magnetic shielding sheet 5 can be made of at least one of copper, aluminum, nickel alloy, ferrite material, and silicon steel sheet. The magnetic shielding sheet 5 has a supporting effect on the plastic body 1, and the structural strength of the magnetic shielding sheet 5 is preferably greater than that of the plastic body 1, so as to enhance the structural strength of the plastic body 1 and the overall structural strength of the optical drive base 100.

[0051] The magnetic shielding sheet 5 is more preferably made of a magnetic material, which not only prevents the magnetic field generated by the coil 3 from leaking outward and improves the magnetic shielding effect of the magnetic shielding sheet 5, but also can be adsorbed by a magnet arranged on a cooperating component (such as a carrier, a lens, or a prism), so as to reset or improve the precise alignment of the cooperating component. This can prevent the optical drive base 100 and the cooperating component from tilting, thereby avoiding abnormal sound when the optical drive base 100 and the cooperating component move relative to each other, and can also concentrate the magnetic force of the magnet and prevent the magnetic field from leaking outward.

[0052] As a preferred mode, the metal circuit 2 and the coil 3 at least partially overlap in projection on the same plane along the thickness direction of the coil 3, that is, at least part of the metal circuit 2 is located below the coil 3 in the thickness direction of the coil 3, especially the metal circuit 2 used for signal transmission is located below the coil 3. The magnetic shielding sheet 5 can shield at least part of the magnetic field generated by the coil 3, that is, can prevent or reduce the magnetic field generated by the coil 3 from overflowing and causing magnetic interference to the metal circuit 2, thereby ensuring the performance of the electronic element 4. More specifically, the metal circuit 2 includes at least a first branch 23 connected to the coil 3 and a second branch 24 connected to the electronic element 4, the second branch 24 includes a signal branch 241 used for signal transmission and passing through the coil 3 along at least one side of the thickness direction of the coil 3, and the signal branch 241 connected to the same electronic element 4 can include two, four, etc., which can be set according to actual needs. The first branch 23 can be connected only to the coil 3, and in other embodiments, the first branch 23 can be connected to both the coil 3 and the electronic element 4. The magnetic shielding sheet 5 is located between the coil 3 and the signal branch 241 along the thickness direction of the coil 3, so as to shield or reduce the magnetic interference caused by the coil 3 to the signal branch 241.

[0053] In some embodiments, the projection of the metal circuit 2 and the coil 3 along the thickness direction of the coil 3 can also not overlap, i.e. the metal circuit 2 can be located outside the projection area of the coil 3 along the thickness direction of the coil 3, for example, the metal circuit 2 is located at the periphery of the coil 3. Since the coil 3 generates a magnetic field when energized, the magnetic field diffuses outward from the coil 3, i.e. the magnetic field generated by the coil 3 will also cause magnetic interference to the metal circuit 2 located outside the projection area of the coil 3 along the thickness direction of the coil 3. The magnetic shielding sheet 5 can also prevent or reduce the magnetic interference of the magnetic field generated by the coil 3 to the metal circuit 2 close to the coil 3.

[0054] As a preferred mode, in the length and width directions of the coil 3, the size of the magnetic shielding sheet 5 is greater than the size of the coil 3, so that the edge of the magnetic shielding sheet 5 protrudes beyond the corresponding edge of the coil 3. That is, in the thickness direction of the coil 3, the projection of the coil 3 and the magnetic shielding sheet 5 along the same plane in the thickness direction of the coil 3, the projection of the coil 3 does not exceed the projection range of the magnetic shielding sheet 5, i.e. the surface area of the magnetic shielding sheet 5 is greater than the outer shape of the coil 3, or in other words, the outer edge of the coil 3 does not exceed the outer edge of the magnetic shielding sheet 5. The corresponding arrangement of the magnetic shielding sheet 5 and the coil 3 can ensure that the magnetic field of the coil 3 can be fully shielded by the magnetic shielding sheet 5 without leaking outward, thereby improving the magnetic shielding effect of the magnetic shielding sheet 5.

[0055] In this application, by arranging the magnetic shielding sheet 5 between the coil 3 and the metal circuit 2, the magnetic shielding sheet 5 has the function of shielding the magnetic field, which can prevent or reduce the magnetic interference of the coil 3 to the metal circuit 2 for signal transmission, thereby preventing or reducing the influence on the use performance of the electronic element 4, ensuring the timely and accurate signal transmission of the electronic element 4, and further ensuring the accuracy and stability of the driving of the optical element.

[0056] In a specific embodiment, referring to Figure 1 , Figure 3 , Figure 4 , Figure 8 , Figure 9 , Figure 10 , the plastic body 1 can be provided with a receiving groove 11 for accommodating the coil 3, and the magnetic shielding sheet 5 can be arranged on the bottom surface of the receiving groove 11 or flush with the bottom surface of the receiving groove 11. The coil 3 can be arranged in close contact with the magnetic shielding sheet 5, such as the coil 3 and the magnetic shielding sheet 5 can be fixed together by glue. Since the metal wire of the coil 3 is coated with an insulating material, especially at the main body portion 31, the coil 3 and the magnetic shielding sheet 5 will not cause a short circuit even if they are in direct contact. The receiving groove 11 not only can accommodate the coil 3 to reduce the overall volume of the optical drive base 100, but also has a positioning effect on the coil 3, which is convenient for positioning during installation of the coil 3, and can also prevent the coil 3 from being shifted, and also has a certain protection effect on the coil 3.

[0057] The magnetic isolation sheet 5 can be fixed to the bottom surface of the accommodating groove 11 by means of attaching, riveting, gluing, clamping, etc. In the present embodiment, the magnetic isolation sheet 5 can be attached to the bottom surface of the accommodating groove 11, for example, the magnetic isolation sheet 5 can be connected to the bottom surface of the accommodating groove 11 by means of an adhesive (not shown), such as glue, and the coil 3 can also be connected to the magnetic isolation sheet 5 by means of the adhesive. The side of the magnetic isolation sheet 5 facing the coil 3 can be provided with a glue accommodating groove (not shown) for accommodating the adhesive, such as glue. The glue accommodating groove can not only increase the contact area between the coil 3 and the magnetic isolation sheet 5, improve the bonding force between the magnetic isolation sheet 5 and the coil 3, and prevent the coil 3 from falling off the magnetic isolation sheet 5, but also increase the volume of the adhesive, thereby increasing the bonding force between the plastic body 1 and the coil 3 or the magnetic isolation sheet 5.

[0058] The magnetic isolation sheet 5 can also be embedded in the plastic body 1 by means of insert molding. During the injection molding process of the plastic body 1, the edge position of the magnetic isolation sheet 5 can be injection molded in the plastic body 1, thereby being embedded in the plastic body 1. The position corresponding to the coil 3 of the magnetic isolation sheet 5 is exposed to the accommodating groove 11 and can be flush with the bottom surface of the accommodating groove 11, and the coil 3 can be connected to the magnetic isolation sheet 5 by means of an adhesive. The side of the magnetic isolation sheet 5 facing away from the coil 3 can also be embedded in the plastic body 1. In this way, not only can the bonding force between the magnetic isolation sheet 5 and the plastic body 1 be improved to prevent the magnetic isolation sheet 5 from falling off the plastic body 1, but also the thickness of the plastic body 1 can be reduced. The side of the magnetic isolation sheet 5 facing the coil 3 is further preferably arranged flush with the bottom surface of the accommodating groove 11.

[0059] The magnetic isolation sheet 5 can also be integrally embedded in the plastic body 1 by means of insert molding, i.e., the magnetic isolation sheet 5 is embedded in the plastic body 1. The coil 3 and the magnetic isolation sheet 5 can be arranged apart from each other, and the plastic body 1 isolates the coil 3 and the magnetic isolation sheet 5. The plastic body 1 can be provided with an accommodating groove 11 for accommodating the coil 3. The coil 3 can be attached to the bottom surface of the accommodating groove 11, and the coil 3 can be connected to the plastic body 1 by means of an adhesive, such as glue.

[0060] Referring to Figure 1 , Figure 4 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 13The bottom surface of the accommodating groove 11 can be provided with a plurality of adhesive storage grooves 111 for accommodating adhesive, such as glue. If the magnetic shielding sheet 5 or the coil 3 is directly adhered to the accommodating groove 11 by adhesive, the adhesive is easily pressed and flows away due to the gravity of the magnetic shielding sheet 5 or the coil 3, resulting in a small contact area between the adhesive and the magnetic shielding sheet 5 or the coil 3, and there is not enough adhesive in contact with the magnetic shielding sheet 5 or the coil 3. The adhesive storage grooves 111 not only increase the contact area between the adhesive and the plastic body 1, improve the bonding force between the plastic body 1 and the adhesive, and prevent the adhesive from falling off the plastic body 1, but also increase the volume of the adhesive, thereby increasing the bonding force between the plastic body 1 and the coil 3 or the magnetic shielding sheet 5.

[0061] When the magnetic shielding sheet 5 is connected to the bottom surface of the accommodating groove 11 by adhesive, at least part of the adhesive fills the adhesive storage grooves 111 to increase the contact area between the adhesive and the magnetic shielding sheet 5, thereby enhancing the stability and reliability of the connection between the magnetic shielding sheet 5 and the bottom surface of the accommodating groove 11.

[0062] When the coil 3 is connected to the bottom surface of the accommodating groove 11 by adhesive, at least part of the adhesive fills the adhesive storage grooves 111 to increase the contact area between the adhesive and the coil 3, thereby enhancing the stability and reliability of the connection between the coil 3 and the bottom surface of the accommodating groove 11.

[0063] Referring to Figure 13 When the magnetic shielding sheet 5 is arranged in the plastic body 1, i.e., the magnetic shielding sheet 5 is embedded in the plastic body 1 by injection molding, at least one side of the magnetic shielding sheet 5 facing the metal circuit 2 can be provided with an insulating layer 51 for preventing short circuit between the magnetic shielding sheet 5 and the metal circuit 2. The insulating layer 51 can isolate the magnetic shielding sheet 5 from the metal circuit 2, effectively preventing the phenomenon of lap joint short circuit between the magnetic shielding sheet 5 and the metal circuit 2.

[0064] At least one side of the metal circuit 2 facing the magnetic shielding sheet 5 can also be provided with an insulating layer 51 for preventing short circuit between the magnetic shielding sheet 5 and the metal circuit 2. The insulating layer 51 can isolate the magnetic shielding sheet 5 from the metal circuit 2, effectively preventing the phenomenon of lap joint short circuit between the magnetic shielding sheet 5 and the metal circuit 2.

[0065] That is, at least one of the side of the magnetic shielding sheet 5 facing the metal circuit 2 and the side of the metal circuit 2 facing the magnetic shielding sheet 5 is provided with an insulating layer 51, which isolates the magnetic shielding sheet 5 from the metal circuit 2, effectively preventing the phenomenon of lap joint short circuit between the magnetic shielding sheet 5 and the metal circuit 2.

[0066] In a specific embodiment, referring to Figure 1 ,Figure 4 、 Figure 8 、 Figure 9 The plastic body 1 can be a quadrilateral as a whole, and can include a bottom portion 12 and a side portion 13 arranged at an angle with the bottom portion 12. The bottom portion 12 of the plastic body 1 can be arranged vertically or substantially vertically with the side portion 13 of the plastic body 1, for example, the bottom portion 12 of the plastic body 1 can be arranged horizontally and the side portion 13 of the plastic body 1 can be arranged vertically. Of course, the bottom portion 12 of the plastic body 1 and the side portion 13 of the plastic body 1 can also be arranged at other angles.

[0067] The coil 3 can be arranged on the bottom portion 12 or the side portion 13 of the plastic body 1, and the electronic component 4 can also be arranged on the bottom portion 12 or the side portion 13 of the plastic body 1. That is, the coil 3 and the electronic component 4 can be arranged on the bottom portion 12 or the side portion 13 of the plastic body 1, or the coil 3 and the electronic component 4 can be arranged separately and arranged on the bottom portion 12 and the side portion 13 of the plastic body 1, respectively. When the coil 3 is arranged on the bottom portion 12 of the plastic body 1, the electronic component 4 can be arranged on the bottom portion 12 of the plastic body 1, or the electronic component 4 can also be arranged on the side portion 13 of the plastic body 1, in which case the metal circuit 2 connected to the electronic component 4 extends from the bottom portion 12 to the side portion 13 of the plastic body 1. When the coil 3 is arranged on the side portion 13 of the plastic body 1, the electronic component 4 can be arranged on the bottom portion 12 of the plastic body 1, or the electronic component 4 can also be arranged on the side portion 13 of the plastic body 1.

[0068] The plastic body 1 can be provided with a receiving groove 11 for receiving the coil 3, and the receiving groove 11 can be arranged on the bottom portion 12 or the side portion 13 of the plastic body 1. The electronic component 4 can be arranged in the receiving groove 11 or outside the receiving groove 11. That is, when the receiving groove 11 is arranged on the bottom portion 12 of the plastic body 1, the electronic component 4 can be arranged in the receiving groove 11 or at a position corresponding to the receiving groove 11, or the electronic component 4 can also be arranged outside the receiving groove 11. When the coil 3 is arranged on the side portion 13 of the plastic body 1, the electronic component 4 can be arranged in the receiving groove 11 or at a position corresponding to the receiving groove 11, or the electronic component 4 can also be arranged outside the receiving groove 11.

[0069] As an example, reference is made to Figure 7 、 Figure 13When the electronic component 4 is located in the accommodating groove 11, the bottom surface of the accommodating groove 11 can be further recessed to be provided with a containing groove 112 containing the electronic component 4. Not only can the connecting part 212 provided on the partial metal circuit 2 and connected with the electronic component 4 be exposed from the bottom surface of the containing groove 112 to ensure that the electronic component 4 can be electrically connected with the metal circuit 2, but also the containing groove 112 can have the protection and positioning effects on the electronic component 4. The bottom surface of the containing groove 112 can be lower than the position where the magnetic isolation sheet 5 is located, that is, the distance from the bottom surface of the containing groove 112 to the bottom surface of the accommodating groove 11 is greater than the distance from the magnetic isolation sheet 5 to the bottom surface of the accommodating groove 11. The electronic component 4 can be located in the cavity 311 formed around the main body part 31 of the coil 3, that is, the containing groove 112 can be located in the cavity 311 formed around the main body part 31 of the coil 3. Of course, the electronic component 4 can also be located at a position outside the cavity 311 formed around the main body part 31 of the coil 3.

[0070] With reference to Figure 1 , Figure 4 , Figure 6 , Figure 8 , Figure 9 , Figure 12 The optical drive base 100 can further include a winding post 14 for positioning the coil 3. The coil 3 can be sleeved on the winding post 14. The winding post 14 can facilitate the installation of the coil 3, prevent the coil 3 from being deviated, and support the movement of the coil 3 to prevent the coil 3 from being deformed. The number of the winding post 14 can be one or more. In the embodiment, the number of the winding post 14 is two. In the length direction of the coil 3, the two winding posts 14 are respectively arranged close to the two ends of the cavity 311 of the coil 3. In some cases, the coil 3 can be directly wound on the winding post 14.

[0071] With reference to Figure 1 When the coil 3 is arranged in abutment with the magnetic isolation sheet 5, the magnetic isolation sheet 5 can be provided with a first hollow part 52 corresponding to the winding post 14 to expose the winding post 14. For example, the winding post 14 can be integrally formed with the plastic body 1, that is, the winding post 14 can be formed with the plastic body 1 by injection molding. In this way, the winding post 14 and the plastic body 1 can be injection molded to improve the production efficiency and ensure that the bonding force between the winding post 14 and the plastic body 1 is large enough to prevent the winding post 14 from being separated from the plastic body 1. Of course, in order to facilitate the connection between the coil 3 and the metal circuit 2, if the lead part 32 of the coil 3 is not covered by an insulating material, the magnetic isolation sheet 5 can be provided with a third hollow part 54 corresponding to the lead part 32 of the coil 3 to prevent the magnetic isolation sheet 5 from being short-circuited by being lapped with the lead part 32. Moreover, the solder leg 211 provided on the metal circuit 2 and connected with the lead part 32 of the coil 3 is located at a position outside the magnetic isolation sheet 5.

[0072] The winding post 14 can also be directly mounted on the magnetic shielding sheet 5. For example, the winding post 14 can be separate from the plastic body 1, and can be injection molded onto the magnetic shielding sheet 5, or installed and fixed onto the magnetic shielding sheet 5 by means of attachment, riveting, gluing, snap-fitting, etc. That is to say, when the winding post 14 is directly mounted on the magnetic shielding sheet 5, the magnetic shielding sheet 5 may not have the first hollow part 52. Similarly, referring to... Figure 8 When the magnetic shielding sheet 5 is embedded in the plastic body 1, the first hollow part 52 does not need to be set at the position of the winding post 14 corresponding to the magnetic shielding sheet 5. This can increase the actual effective area of ​​the magnetic shielding sheet 5, further prevent the magnetic field generated by the coil 3 from leaking outward through the first hollow part 52, thereby improving the shielding effect of the magnetic shielding sheet 5, further reducing the magnetic interference caused by the coil 3 to the metal circuit 2 used for signal transmission, reducing the impact on the performance of the electronic component 4, ensuring timely and accurate signal transmission of the electronic component 4, and thus ensuring the accuracy and stability of the drive of the optical component.

[0073] Of course, when the winding post 14 is directly mounted on the magnetic shielding sheet 5, the winding post 14 can also be integrally formed with the plastic body 1. For example, a portion of the plastic body 1 can cover the magnetic shielding sheet 5 and connect to the winding post 14. This portion of the plastic body 1 is preferably a thinner plastic body 1, which increases the stability of the winding post 14 position and avoids affecting the installation of the coil 3 due to the excessive thickness of the plastic body 1 at this location. In this embodiment, the material of the winding post 14 and the plastic body 1 is preferably the same material, and regardless of whether the winding post 14 and the plastic body 1 are integrally formed or separate, the winding post 14 is preferably formed together with the plastic body 1 by injection molding. Of course, the winding post 14 and the plastic body 1 can also be formed by two injection molding processes.

[0074] Reference Figure 1 , Figure 8 When the electronic component 4 is positioned corresponding to the magnetic shielding sheet 5, a second cutout portion 53 can be provided at the position corresponding to the electronic component 4 to expose the electronic component 4. The second cutout portion 53 not only facilitates the connection between the electronic component 4 and the metal circuit 2, but also facilitates heat dissipation of the electronic component 4, ensuring the stability of the performance of the electronic component 4.

[0075] In some embodiments, the plastic body 1 can also not be provided with the accommodating groove 11, and the magnetic isolation sheet 5 can be directly arranged on the surface of the plastic body 1 or exposed from the surface of the plastic body 1, and the coil 3 can be arranged on the magnetic isolation sheet 5. Alternatively, when the magnetic isolation sheet 5 is arranged on the plastic body 1 and the coil 3 is arranged apart from the magnetic isolation sheet 5, for example, the magnetic isolation sheet 5 is embedded in the plastic body 1, the coil 3 can be directly arranged on the surface of the plastic body 1, for example, the coil 3 can be connected to the surface of the plastic body 1 through an adhesive. The surface of the plastic body 1 can also be provided with a plurality of glue storage grooves 111, which can also increase the bonding force between the plastic body 1 and the coil 3 or the magnetic isolation sheet 5.

[0076] When the plastic body 1 is not provided with the accommodating groove 11, the accommodating groove 112 can be directly arranged on the plastic body 1, not only part of the metal circuit 2 can be exposed from the bottom surface of the accommodating groove 112 to ensure that the electronic element 4 can be electrically connected to the metal circuit 2, but also the accommodating groove 112 can have the protection and positioning effect on the electronic element 4, and can also reduce the height of the electronic element 4 protruding from the plastic body 1, thereby reducing the overall volume of the optical drive base 100. When the electronic element 4 is arranged corresponding to the magnetic isolation sheet 5, the position corresponding to the electronic element 4 of the magnetic isolation sheet 5 can also be provided with a second hollow part 53 to expose the electronic element 4. The accommodating groove 112 can be arranged on the side of the plastic body 1 facing the coil 3, and the accommodating groove 112 can also be arranged on the side of the plastic body 1 away from the coil 3.

[0077] In some cases, the metal circuit 2 can be exposed from the plastic body 1 without the need to arrange the accommodating groove 112, so that the electronic element 4 can also be electrically connected to the metal circuit 2. That is, the electronic element 4 can be arranged at a position outside the projection area of the magnetic isolation sheet 5, or the electronic element 4 can be arranged on the side of the plastic body 1 away from the coil 3.

[0078] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments without departing from the principles and purposes of the present application within the scope of the present application. All these changes should be within the protection scope of the claims of the present application.

Claims

1. An optical drive base, characterized by, The application relates to a plastic body, a metal circuit arranged on the plastic body, and a coil and an electronic component electrically connected with the metal circuit, wherein a magnetic isolation sheet is arranged between the coil and at least part of the metal circuit. In the length and width directions of the coil, the size of the magnetic isolation sheet is greater than the size of the coil, so that the edges of the magnetic isolation sheet protrude from the corresponding edges of the coil; and / or, 2. The optical drive base of claim 1, wherein, The projection of the metal circuit and the coil on the same plane in the thickness direction of the coil at least partially overlaps. The plastic body is provided with a receiving groove for receiving the coil, the magnetic isolation sheet is arranged on the bottom surface of the receiving groove or is flush with the bottom surface of the receiving groove, and the coil is arranged in close contact with the magnetic isolation sheet.

3. The optical drive base of claim 1, wherein, The magnetic isolation sheet is attached to the bottom surface of the receiving groove; or, 4. The optical drive base of claim 3, wherein, The edge position of the magnetic isolation sheet is embedded in the plastic body, and the corresponding position of the magnetic isolation sheet and the coil is exposed to the receiving groove. The magnetic isolation sheet is integrally embedded in the plastic body, the coil and the magnetic isolation sheet are arranged in a spaced manner, the plastic body is provided with a receiving groove for receiving the coil, and the coil is attached to the bottom surface of the receiving groove.

5. The optical drive base of claim 1, wherein, At least one side of the magnetic isolation sheet facing the metal circuit is provided with an insulating layer for preventing short circuit between the magnetic isolation sheet and the metal circuit; and / or, 6. The optical drive base of claim 5, wherein, At least one side of the metal circuit facing the magnetic isolation sheet is provided with an insulating layer for preventing short circuit between the magnetic isolation sheet and the metal circuit. The insulating layer is at least one of a thermosetting adhesive coating, an ink coating and a Teflon coating.

7. The optical drive base of claim 6, wherein, The bottom surface of the receiving groove is provided with a plurality of adhesive storage grooves for containing adhesive; 8. The optical drive base of claim 3 or 5, wherein, When the magnetic isolation sheet is connected to the bottom surface of the receiving groove through the adhesive, at least part of the adhesive is filled in the adhesive storage groove, so as to increase the contact area between the adhesive and the magnetic isolation sheet; When the coil is connected to the bottom surface of the receiving groove through the adhesive, at least part of the adhesive is filled in the adhesive storage groove, so as to increase the contact area between the adhesive and the coil. The plastic body comprises a bottom and a side arranged at an angle with the bottom, the coil is located on the bottom of the plastic body or the side of the plastic body, and the electronic component is located on the bottom of the plastic body or the side of the plastic body.

9. The optical drive base of claim 1, wherein, The plastic body is provided with a receiving groove for receiving the coil, the receiving groove is located on the bottom of the plastic body or the side of the plastic body, and the electronic component is located in the receiving groove or outside the receiving groove; 10. The optical drive base of claim 9, wherein, When the electronic component is located in the receiving groove, the bottom surface of the receiving groove is further recessed to be provided with a containing groove for containing the electronic component, the bottom surface of the containing groove is lower than the position where the magnetic isolation sheet is located, the coil comprises a main body part and a lead part, the electronic component is located in the cavity formed by the main body part of the coil, and the metal circuit is provided with a connecting part exposed in the containing groove to be connected with the electronic component. ​ 11. The optical drive base of claim 1, wherein, Further comprising a winding post for positioning the coil, the position corresponding to the winding post of the magnetic isolation sheet is provided with a first hollow part to expose the winding post or the winding post is directly provided on the magnetic isolation sheet; and / or, The position corresponding to the electronic element of the magnetic isolation sheet is provided with a second hollow part to expose the electronic element.

12. The optical drive base of claim 1, wherein, The metal circuit comprises at least a first branch connected with the coil and a second branch connected with the electronic element, the second branch comprises a signal branch for signal transmission and passing through the coil along at least one side of the thickness direction of the coil, the magnetic isolation sheet is located between the coil and the signal branch along the thickness direction of the coil for shielding or reducing the magnetic interference of the coil on the signal branch.

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