Optical driving base and optical driving assembly

Abstract

The utility model discloses an optical driving pedestal and an optical driving assembly, and the optical driving pedestal comprises an insulating pedestal, and a conductive branch and a metal plate which are embedded in the insulating pedestal. The projections of the conductive branch and the metal plate in the thickness direction of the metal plate are at least partially overlapped; wherein an isolating layer is formed on the surface, facing the metal plate, of the conductive branch and / or the surface, facing the conductive branch, of the metal plate, and the isolating layer insulates and separates the conductive branch and the metal plate. The optical driving base and the optical driving assembly are used for preventing short circuit caused by mutual lap joint of the conductive branch and the metal plate, and the size of the optical driving base is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of camera modules, in particular to an optical drive base and an optical drive assembly. Background Art

[0002] Generally, a motor is provided in a camera module, and a main component of the motor is an optical drive base. The optical drive base includes an insulating base, a conductive branch, and a metal plate. The conductive branch and the metal plate are embedded in the insulating base. The conductive branch can be used for electrically connecting with electronic components, and the metal plate can be used for enhancing the mechanical strength of the optical drive base.

[0003] The distance between the conductive branch and the metal plate will affect the volume of the optical drive base. If the distance between the conductive branch and the metal plate is small, when the conductive branch and the metal plate are embedded in the insulating base, due to reasons such as the shaking of the device and the impact of molten plastic during the injection molding of the insulating base, the conductive branch and the metal plate may generate a position and overlap, and at this time, the conductive branch and the metal plate are in electrical contact and may cause a short circuit during use. If the distance between the conductive branch and the metal plate is increased, the volume of the optical drive base will become larger. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an optical drive base and an optical drive assembly for preventing the conductive branch and the metal plate from short - circuiting due to mutual overlap and reducing the volume of the optical drive base.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] An optical drive base includes an insulating base and a conductive branch and a metal plate embedded in the insulating base; the projections of the conductive branch and the metal plate along the thickness direction of the metal plate overlap at least partially.

[0007] Wherein, an isolation layer is formed on the surface of the conductive branch facing the metal plate, and / or on the surface of the metal plate facing the conductive branch, and the isolation layer insulates and separates the conductive branch and the metal plate.

[0008] Preferably, the part with the smallest distance between the conductive branch and the metal plate along the thickness direction of the metal plate is indirectly abutted through the isolation layer so that the part with the smallest distance between the conductive branch and the metal plate along the thickness direction of the metal plate is insulated and separated by the isolation layer; and / or,

[0009] The minimum distance between the metal plate and the conductive branch along the thickness direction of the metal plate is less than or equal to 0.15 mm.

[0010] Preferably, in the thickness direction of the metal plate, the metal plate and the conductive branch are spaced apart, and a partial structure of the insulating base is filled in the space between the metal plate and the conductive branch. The metal plate and the conductive branch are insulated from each other by the isolation layer and the partial insulating base filled between the metal plate and the conductive branch;

[0011] Among them, the minimum distance between the metal plate and the conductive branch in the thickness direction of the metal plate is 0.1 mm.

[0012] Preferably, the insulating base includes an insulating block formed by a first injection molding and an insulating body formed by a second injection molding. The insulating block covers at least part of the conductive branch and at least part of the metal plate to fix the conductive branch and the metal plate.

[0013] Preferably, the isolation layer is a dotting layer, a silk-screen printing layer, an inkjet layer, or an electrophoresis layer; and / or, the material of the isolation layer is at least one of thermosetting glue, ink, and Teflon.

[0014] Preferably, it further includes an electronic component. The electronic component is electrically connected to the surface of the conductive branch facing away from the metal plate, and the projection of the electronic component and the metal plate in the thickness direction of the metal plate overlaps.

[0015] Preferably, the insulating base is provided with a receiving groove for receiving the electronic component. A part of the conductive branch is exposed in the receiving groove and forms a welding part. The electronic component is fixedly connected to the welding part to be electrically connected to the conductive branch.

[0016] Preferably, the electronic component includes a coil. In the thickness direction of the metal plate, the coil and the metal plate are arranged on opposite sides of the welding part, and the projection of the coil in the thickness direction of the metal plate completely falls within the area where the metal plate is located; and / or,

[0017] The material of the metal plate is a magnetic material.

[0018] Preferably, the metal plate is provided with a positioning hole. The positioning hole projects onto the surface of the conductive branch facing the metal plate in the thickness direction of the metal plate. The positioning hole is used for an external jig to pass through to press and position the conductive branch;

[0019] and / or, the surface of the metal plate facing away from the conductive branch is flush with the surface of the insulating base.

[0020] An optical drive assembly includes:

[0021] The optical drive base according to any one of the above;

[0022] A magnetic component, which can generate magnetic force and is attracted by the metal plate of the optical drive base.

[0023] Compared with the prior art, the beneficial effects of the present utility model at least include:

[0024] By providing an isolation layer to separate the conductive branch and the metal plate, it is possible to prevent short circuits caused by the conductive branch and the metal plate overlapping each other. The conductive branch can be arranged adjacent to the metal plate and is not prone to short - circuit risks, thereby reducing the distance between the conductive branch and the metal plate; therefore, the thickness of the insulating block covering the conductive branch and the metal plate can also be relatively thin, and thus the volume of the optical drive base can be reduced. Description of the Drawings

[0025] Figure 1 is a schematic structural view of the optical drive base according to an embodiment of the present utility model;

[0026] Figure 2 is an exploded view of the optical drive base according to an embodiment of the present utility model;

[0027] Figure 3 is Figure 2 a further exploded perspective view;

[0028] Figure 4 is a partial cross - sectional view of the optical drive base according to an embodiment of the present utility model;

[0029] Figure 5 is Figure 4 an enlarged view of part A in

[0030] Figure 6 is Figure 4 an enlarged view of part A in another arrangement mode of the conductive branch and the metal plate in

[0031] Figure 7 is a partial structural view of the optical drive base according to an embodiment of the present utility model.

[0032] In the figure: 1. Insulating base; 11. Insulating block; 12. Insulating body; 13. Receiving groove; 2. Conductive branch; 21. Welding part; 3. Metal plate; 31. Positioning hole; 4. Isolation layer; 5. Electronic component; 51. Coil; 52. Integrated circuit. Detailed Embodiments

[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this utility model will be more complete and comprehensive, and the concept of the example embodiments will be fully conveyed to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their repeated description will be omitted.

[0034] The words expressing positions and directions described in this utility model are all illustrated by taking the accompanying drawings as examples, but can be changed according to needs, and all the changes made are included in the protection scope of this utility model.

[0035] As Figures 1 to 3 shown, this utility model provides an optical drive base, which can be applied in the optical drive mechanism of a camera module and is used to drive optical elements such as a lens assembly, a prism assembly, or an aperture assembly. The optical drive base can be a focus motor base, an anti-shake motor base, an aperture assembly base, a periscope motor base, a voice coil motor base, etc. The optical drive base includes an insulating base 1, a conductive branch 2 and a metal plate 3 embedded in the insulating base 1, and may also include an electronic component 5.

[0036] The insulating base 1 may include an insulating block 11 formed by one-shot injection molding and an insulating body 12 formed by secondary injection molding. When the insulating block 11 is formed by one-shot injection molding, it can cover part of the conductive branch 2 and at least part of the metal plate 3, so that the conductive branch 2 and the metal plate 3 can be embedded in the insulating block 11 in an integrally formed manner and maintain relative fixation of their positions. When the insulating body 12 is formed by secondary injection molding, it can cover the insulating block 11 and the conductive branch 2 and the metal plate 3 protruding from the insulating block 11, so that the insulating base 1, the conductive branch 2 and the metal plate 3 form an integral structure. Among them, the insulating block 11 and the insulating body 12 are respectively prepared from insulating materials such as plastics.

[0037] The conductive branch 2 is used for electrically connecting with the electronic component 5. There may be a plurality of conductive branches 2, and the plurality of conductive branches 2 are spaced apart from each other. The plurality of conductive branches 2 can be used for electrically connecting with one or more electronic components 5. Among them, the conductive branch 2 is a metal branch, for example, the conductive branch 2 is formed by a conductive terminal made of a metal material. The conductive branch 2 may be provided with a welding portion 21, and the conductive branch 2 is welded to the electronic component 5 through the welding portion 21 or adhered by a conductive adhesive to achieve a fixed connection, thereby realizing the electrical connection between the conductive branch 2 and the electronic component 5.

[0038] The metal plate 3 is made of a metal material, and the metal plate 3 has relatively high structural strength. After the metal plate 3 is embedded in the insulating base 1, the structural strength of the insulating base 1 can be enhanced. The projection of the metal plate 3 and the conductive branch 2 in the thickness direction of the metal plate 3 can be arranged to at least partially overlap. Among them, the metal plate 3 at least overlaps with the conductive branch 2 in the position of the insulating block 11 in the thickness direction of the metal plate 3. After the metal plate 3 is embedded in the insulating block 11, the surface of the metal plate 3 facing away from the conductive branch 2 can be exposed, and the surface of the metal plate 3 facing away from the conductive branch 2 can be flush with the surface of the insulating base 1; specifically, the surface of the metal plate 3 facing away from the conductive branch 2 can be flush with the surface of the insulating block 11 adjacent to the metal plate 3.

[0039] Refer to Figure 2 and Figure 3 , for the convenience of positioning the conductive branch 2, the metal plate 3 can be provided with a positioning hole 31. The positioning hole 31 can penetrate the metal plate 3 along the thickness direction of the metal plate 3, and the projection of the positioning hole 31 and the conductive branch 2 in the thickness direction of the metal plate 3 can overlap each other, so that the projection of the positioning hole 31 in the thickness direction of the metal plate 3 can be projected onto the surface of the conductive branch 2 facing the metal plate 3. When the insulating block 11 is injection-molded at one time, an external pressing fixture can pass through the positioning hole 31 of the metal plate 3 to press and position the conductive branch 2, thereby realizing the fixation of the conductive branch 2. When the conductive branch 2 is pressed by the pressing fixture, the insulating block 11 can be injection-molded.

[0040] Refer to Figures 4 to 6 , after the conductive branch 2 and the metal plate 3 are embedded in the insulating block 11, to prevent the conductive branch 2 and the metal plate 3 from being mutually lapped and generating electrical contact due to the relative displacement of the metal plate 3 and the conductive branch 2 during preparation, an isolation layer 4 can be formed on the surface of the conductive branch 2 facing the metal plate 3 and / or the surface of the metal plate 3 facing the conductive branch 2. When the conductive branch 2 and the metal plate 3 are lapped, the conductive branch 2 and the metal plate 3 can be separated by the isolation layer 4, so that the conductive branch 2 and the metal plate 3 are insulated from each other, thereby preventing the risk of short circuit after the conductive branch 2 and the metal plate 3 are mutually lapped.

[0041] Among them, the isolation layer 4 can be a dotting layer formed by dotting, a silk screen layer formed by printing, an inkjet layer formed by spraying, or an electrophoresis layer formed by electrophoresis. The material of the isolation layer 4 is an insulating material. For example, the material of the isolation layer 4 is a thermosetting adhesive, ink, or Teflon. Among them, the thermosetting adhesive can be an adhesive such as silica gel or UV curable adhesive, and Teflon can be PTFE (polytetrafluoroethylene).

[0042] By providing the isolation layer 4 to separate the conductive branch 2 and the metal plate 3, it is possible to prevent a short circuit from occurring due to the mutual overlap of the conductive branch 2 and the metal plate 3. The conductive branch 2 can be disposed adjacent to the metal plate 3 with a low risk of short circuit, thereby reducing the distance between the conductive branch 2 and the metal plate 3. At this time, the thickness of the insulating block 11 covering the conductive branch 2 and the metal plate 3 can also be relatively thin, thereby reducing the volume of the optical drive base, which is beneficial to the thin design of the optical drive base.

[0043] Referring to Figure 6 , in some specific embodiments, during the extension of the conductive branch 2, there may be a portion that bends and extends in the thickness direction of the metal plate 3, resulting in different distances between the conductive branch 2 and the metal plate 3. To further reduce the distance between the conductive branch 2 and the metal plate 3, in the thickness direction of the metal plate 3, the minimum distance between the conductive branch 2 and the metal plate 3 can be the same as the thickness of the isolation layer 4, so that the portion of the conductive branch 2 and the metal plate 3 at the minimum distance indirectly abuts through the isolation layer 4, and the conductive branch 2 and the metal plate 3 are only insulated and separated by the isolation layer 4 at the minimum distance. The portions with a larger distance between the conductive branch 2 and the metal plate 3 can be spaced apart from each other, and at least part of the insulating block 11 is formed or filled in the larger gap between the conductive branch 2 and the metal plate 3. The conductive branch 2 and the metal plate 3 can be insulated and separated by the isolation layer 4 and part of the insulating block 11 at the portions with a larger distance. Among them, the portion with a larger distance between the conductive branch 2 and the metal plate 3 can be the portion where the distance between the conductive branch 2 and the metal plate 3 is greater than the minimum distance. When only one of the surface of the conductive branch 2 facing the metal plate 3 and the surface of the metal plate 3 facing the conductive branch 2 is provided with the isolation layer 4, the minimum distance between the conductive branch 2 and the metal plate 3 in the thickness direction of the metal plate 3 is the same as the thickness of one isolation layer 4. When the surface of the conductive branch 2 facing the metal plate 3 and the surface of the metal plate 3 facing the conductive branch 2 are respectively provided with the isolation layer 4, the minimum distance between the conductive branch 2 and the metal plate 3 in the thickness direction of the metal plate 3 is the same as the sum of the thicknesses of the two isolation layers 4.

[0044] In other embodiments, if the distance between the conductive branch 2 and the metal plate 3 remains the same in the thickness direction of the metal plate 3, the conductive branch 2 and the metal plate 3 can be indirectly abutted entirely through the isolation layer 4, and the conductive branch 2 and the metal plate 3 are only insulated and separated by the isolation layer 4. When only one of the surface of the conductive branch 2 facing the metal plate 3 and the surface of the metal plate 3 facing the conductive branch 2 is provided with the isolation layer 4, the distance between the conductive branch 2 and the metal plate 3 in the thickness direction of the metal plate 3 is the same as the thickness of one isolation layer 4. When the surface of the conductive branch 2 facing the metal plate 3 and the surface of the metal plate 3 facing the conductive branch 2 are respectively provided with the isolation layer 4, the distance between the conductive branch 2 and the metal plate 3 in the thickness direction of the metal plate 3 is the same as the sum of the thicknesses of the two isolation layers 4.

[0045] Referring to Figure 5 , in some other specific embodiments, if the metal plate 3 or the conductive branch 2 is bent, or there are relatively large burrs at the edges when the metal plate 3 and the conductive branch 2 are formed, there may be a situation where the burrs on the metal plate 3, the conductive branch 2, or formed on the metal plate 3 and the conductive branch 2 may penetrate through the isolation layer 4 and cause electrical contact between the metal plate 3 and the conductive branch 2. To further improve the reliability of the insulation separation between the metal plate 3 and the conductive branch 2, even the smallest spacing between the metal plate 3 and the conductive branch 2 is kept spaced apart, and a partial insulating base 1 is formed or filled between the metal plate 3 and the conductive branch 2. For example, a partial insulating block 11 is formed or filled between the metal plate 3 and the conductive branch 2. Therefore, in the thickness direction of the metal plate 3, any part between the metal plate 3 and the conductive branch 2 is insulated and separated by the isolation layer 4 and the partial insulating block 11 respectively, so that the isolation layer 4 and the insulating block 11 located between the metal plate 3 and the conductive branch 2 are jointly used to insulate and separate the metal plate 3 and the conductive branch 2, effectively improving the reliability of the insulation separation between the metal plate 3 and the conductive branch 2. Among them, the minimum spacing between the metal plate 3 and the conductive branch 2 in the thickness direction of the metal plate 3 is less than or equal to 0.15 mm, preferably 0.07 mm, 0.09 mm or 0.1 mm.

[0046] The electronic component 5 can be electrically connected to the surface of the side of the conductive branch 2 facing away from the metal plate 3. For example, the electronic component 5 can be soldered to the surface of the side of the conductive branch 2 facing away from the metal plate 3; and the projection of the electronic component 5 and the metal plate 3 in the thickness direction of the metal plate 3 can be overlapped. Among them, the electronic component 5 can include a coil 51 or a Hall sensor (Hall Sensor, HS), or the electronic component 5 can be an integrated circuit (Integrated Circuit, IC) containing a Hall sensor (Hall Sensor), or a driving integrated circuit (Driver IC) 52 connecting the coil 51 and containing a Hall sensor.

[0047] Referring to Figure 2 and Figure 7 , in some specific embodiments, to facilitate accommodating the electronic component 5, the insulating base 1 can be provided with a receiving groove 13 for accommodating the electronic component 5. Specifically, the insulating block 11 of the insulating base 1 can be provided with this receiving groove 13. The welding part 21 of the conductive branch 2 can be exposed in the receiving groove 13, so that when the electronic component 5 is installed in the receiving groove 13, it can be soldered to the welding part 21 exposed in the receiving groove 13 to realize the electrical connection between the electronic component 5 and the conductive branch 2.

[0048] In some specific embodiments, when the electronic component 5 includes a coil 51 and an integrated circuit (IC) 52 containing a Hall Sensor, the coil 51 and the metal plate 3 can be arranged on opposite sides of the welding part 21 of the conductive branch 2, and the coil 51 is welded to at least a part of the welding parts 21. The outer shape of the coil 51 can be smaller than the area of the surface of the metal plate 3 facing the coil 51, and the projection of the coil 51 in the thickness direction of the metal plate 3 can completely fall within the surface area of the metal plate 3. To increase the magnetic flux of the coil 51, the material of the metal plate 3 can be a magnetic material. Therefore, the metal plate 3 can form a magnetic yoke structure to prevent the leakage of the magnetic flux when the coil 51 is working, increase the magnetic flux when the coil 51 is working, and improve the magnetic shielding effect of the optical drive base. The coil 51 in this embodiment is a hollow coil, and the integrated circuit (IC) 52 is located in the hollow part wound by the coil 51 and is welded to a part of the welding parts 21. The welding parts 21 welded to the integrated circuit (IC) 52 and the positioning holes 31 of the metal plate 3 overlap in the projection along the thickness direction of the metal plate 3, so that the welding parts 21 can be pressed tightly through the positioning holes 31 by a jig, thereby realizing the precise positioning of the welding parts 21.

[0049] The present utility model also provides an optical drive assembly, including a magnetic element and the above-mentioned optical drive base.

[0050] The magnetic element can be a magnet. A wall with a relatively fixed position can be arranged between the magnetic element and the metal plate 3 of the optical drive base. The magnetic element can attract each other with the metal plate 3 and make the magnetic element fit against the wall between the magnetic element and the metal plate 3 under the attraction of the metal plate 3. When the magnetic element moves, it will slide along the wall, thereby reducing the noise generated by the movement of the magnetic element and reducing the shaking generated by the magnetic element. Among them, the optical drive assembly can be arranged in the motor of the camera module, and the magnetic element can be a magnet arranged on a carrier, a lens or a prism in the motor. And, through the attraction of the metal plate 3, the magnetic element can be attracted and reset by the metal plate 3 after moving, and at the same time, the alignment accuracy of the magnetic element can also be improved.

[0051] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present utility model. Without departing from the principle and purpose of the present utility model, those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the utility model, and all these changes should fall within the protection scope of the claims of the present utility model.

Claims

1. An optical drive base, characterized in that, It includes an insulating base (1), a conductive branch (2) and a metal plate (3) embedded in the insulating base (1); the conductive branch (2) and the metal plate (3) are arranged such that their projections in the thickness direction of the metal plate (3) overlap at least partially. Wherein, an isolation layer (4) is formed on the surface of the conductive branch (2) facing the metal plate (3) and / or on the surface of the metal plate (3) facing the conductive branch (2), and the isolation layer (4) insulates and separates the conductive branch (2) and the metal plate (3).

2. The optical drive base according to claim 1, wherein The part with the smallest distance between the conductive branch (2) and the metal plate (3) in the thickness direction of the metal plate (3) is indirectly in contact through the isolation layer (4) so that the part with the smallest distance between the conductive branch (2) and the metal plate (3) in the thickness direction of the metal plate (3) is insulated and separated by the isolation layer (4); and / or, The minimum distance between the metal plate (3) and the conductive branch (2) in the thickness direction of the metal plate (3) is less than or equal to 0.15 mm.

3. The optical drive base according to claim 1, wherein In the thickness direction of the metal plate (3), the metal plate (3) and the conductive branch (2) are arranged at intervals, and the interval between the metal plate (3) and the conductive branch (2) is filled with a part of the structure of the insulating base (1), and the metal plate (3) and the conductive branch (2) are insulated and separated by the isolation layer (4) and a part of the insulating base (1) filled between the metal plate (3) and the conductive branch (2).

4. The optical drive base according to claim 1, characterized in that, The insulating base (1) includes an insulating block (11) formed by one-time injection molding and an insulating body (12) formed by secondary injection molding. The insulating block (11) covers at least part of the conductive branch (2) and at least part of the metal plate (3) to fix the conductive branch (2) and the metal plate (3).

5. The optical drive base according to claim 1, wherein The isolation layer (4) is a dotting layer, a silk-screening layer, an ink-jet layer, or an electrophoresis layer; and / or, the material of the isolation layer (4) is at least one of thermosetting glue, ink, and Teflon.

6. The optical drive base according to claim 1, wherein It further includes an electronic component (5). The electronic component (5) is electrically connected to the surface of the conductive branch (2) facing away from the metal plate (3), and the projection of the electronic component (5) and the metal plate (3) in the thickness direction of the metal plate (3) overlaps.

7. The optical drive base according to claim 6, characterized in that, The insulating base (1) is provided with a receiving groove (13) for receiving the electronic component (5). A part of the conductive branch (2) is exposed in the receiving groove (13) and forms a welding part (21), and the electronic component (5) is fixedly connected to the welding part (21) to be electrically connected to the conductive branch (2).

8. The optical drive base according to claim 7, wherein, The electronic component (5) includes a coil (51). In the thickness direction of the metal plate (3), the coil (51) and the metal plate (3) are arranged on opposite sides of the welding part (21), and the projection of the coil (51) in the thickness direction of the metal plate (3) completely falls within the area where the metal plate (3) is located; and / or, The material of the metal plate (3) is a magnetic material.

9. The optical drive base according to claim 7, wherein The metal plate (3) is provided with positioning holes (31), and the positioning holes (31) are projected onto the surface of the conductive branch (2) facing the metal plate (3) along the thickness direction of the metal plate (3). The positioning holes (31) are used for an external jig to pass through to press and position the conductive branch (2); And / or, the surface of the metal plate (3) facing away from the conductive branch (2) is flush with the surface of the insulating base (1).

10. An optical drive component, characterized in that, Comprising: The optical drive base according to any one of claims 1 to 9; A magnetic element that can generate a magnetic force and is attracted by the metal plate (3) of the optical drive base.

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