CN114422681B - Driving mechanism, driving mechanism combination, camera module and electronic equipment - Google Patents
Driving mechanism, driving mechanism combination, camera module and electronic equipment Download PDFInfo
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- CN114422681B CN114422681B CN202210103626.XA CN202210103626A CN114422681B CN 114422681 B CN114422681 B CN 114422681B CN 202210103626 A CN202210103626 A CN 202210103626A CN 114422681 B CN114422681 B CN 114422681B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
- H02K41/0352—Unipolar motors
- H02K41/0354—Lorentz force motors, e.g. voice coil motors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/58—Means for changing the camera field of view without moving the camera body, e.g. nutating or panning of optics or image sensors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
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- Studio Devices (AREA)
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Abstract
The invention provides a driving mechanism for driving an image sensor assembly to move, the driving mechanism comprises a mounting area and a butt joint area arranged at one side of the mounting area, a part of the driving mechanism corresponding to the mounting area comprises a mounting unit for mounting and electrically connecting the image sensor assembly, the driving mechanism comprises an elastic body, an insulating layer arranged on the elastic body and a conductive circuit layer arranged on the insulating layer, the elastic body, the insulating layer and the conductive circuit layer are positioned in the mounting area and the butt joint area, the insulating layer and the conductive circuit layer extend beyond the elastic body in the direction from the mounting area to the butt joint area, and the part of the conductive circuit layer beyond the elastic body comprises a plurality of connecting sheets.
Description
Technical Field
The present invention relates to the field of electronic devices, and in particular, to a driving mechanism, a driving mechanism assembly, a camera module, and an electronic device.
Background
With the development of electronic technology, photographing performance of electronic devices has become more and more powerful. When the existing electronic equipment is used for photographing, the electronic equipment not only can be used for automatically focusing, but also can be used for automatically preventing shake.
Currently, when an electronic device is photographed, both automatic focusing and automatic anti-shake are realized through a driving device arranged in the electronic device. Specifically, the driving device comprises a focusing driving motor and an anti-shake driving device, the lens is driven to move along the optical axis direction of the lens by the focusing driving motor so as to realize an automatic focusing function, and the image sensor is driven to move in a plane perpendicular to the optical axis of the lens by the anti-shake driving device so as to realize an automatic anti-shake function.
In the prior art, an image sensor driving mechanism is connected with a main circuit board through a flexible circuit board, one end of the flexible circuit board is provided with a connecting sheet, the connecting sheet at one end of the flexible circuit board is connected with a signal connecting sheet of the image sensor driving mechanism through a welding mode, the other end of the flexible circuit board is provided with a connecting sheet or a connector connected with the main circuit board, and the main circuit board is connected with the other end of the flexible circuit board through a welding mode (the connecting sheet of the main circuit board is welded with the connecting sheet of the flexible circuit board) or a plugging mode (the main circuit board is plugged into the connector arranged at the other end of the flexible circuit board), so that signals of the image sensor driving mechanism can be communicated with the main circuit board through the flexible circuit board.
For example, in chinese patent application CN108780207a, an electrical trace and an electrical connection element (i.e. a connection pad) corresponding to the electrical trace are manufactured on a substrate disposed on an upper surface of an elastomer of the photosensitive assembly driving mechanism by a metal deposition process, and the electrical connection element is connected to the main circuit board through a flexible circuit board. Therefore, the connecting piece of the photosensitive assembly driving mechanism is connected with the connecting piece of the flexible circuit board in a welding mode, on one hand, poor connection can be caused by unstable welding process, the reliability of connection can be reduced after long-time use, and the signal transmission performance is reduced. On the other hand, the signals of the photosensitive assembly driving mechanism are communicated with the main circuit board only through two times of welding of the flexible circuit board (namely, the connecting piece at one end of the flexible circuit board is welded with the connecting piece of the photosensitive assembly driving mechanism, and the connecting piece at the other end of the flexible circuit board is welded with the connecting piece of the main circuit board), so that the circuit resistance is increased, and the signal loss rate is high. In addition, the photosensitive assembly driving mechanism is further welded with the flexible circuit board, so that the welding structure increases the installation space, the thickness of the whole part is increased, and the light and thin integrated design of the camera module and the electronic equipment is not facilitated.
Therefore, it is necessary to provide a new driving mechanism, a driving mechanism combination, a camera module and an electronic device.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a novel driving mechanism, a driving mechanism combination, a camera module and electronic equipment, so as to overcome the defects of the prior art.
The first technical scheme adopted by the invention for solving the problems in the prior art is as follows:
the utility model provides a actuating mechanism for drive image sensor subassembly motion, actuating mechanism include the installation region and set up in the butt joint region of installation region one side, the installation region is including being used for installing and electric connection the installation unit of image sensor subassembly, actuating mechanism include the elastomer, set up in insulating layer on the elastomer and set up in conductive line layer on the insulating layer, the elastomer the insulating layer with conductive line layer all is located the installation region with the butt joint region, the insulating layer with conductive line layer in the installation region extremely extend in the direction of butt joint region surpass the elastomer, the conductive line layer surpass the part of elastomer includes a plurality of connection pieces.
Further, the mounting area further comprises a flexible circuit part located at the periphery of the mounting unit and an external fixing unit located at the periphery of the flexible circuit part, the mounting unit can move relative to the external fixing unit so as to drive the flexible circuit part to elastically deform, and the butt joint area is arranged on the external fixing unit.
Further, the insulating layer comprises a main body portion and a flexible extension portion, the flexible extension portion and the main body portion are arranged in the same layer, the main body portion is arranged corresponding to the installation area, and the flexible extension portion is arranged corresponding to the butt joint area.
Further, the main body portion and the flexible extension portion are made of the same material and integrally connected.
Further, the driving mechanism further includes a flexible reinforcing portion provided separately from the flexible extension portion, the flexible reinforcing portion being attached below the flexible extension portion to support the flexible extension portion.
Further, the elastomer includes upper surface and the lower surface of relative setting, the elastomer includes from the recess area that the upper surface undercut formed, the recess area is located the butt joint area, flexibility enhancing part pack in the recess area and extend the recess area.
Further, the thickness of the insulating layer is 5um-200um, and the thickness of the flexibility enhancing part is 5um-50um.
Further, the flexible reinforcing part is attached to the inner wall of the concave area in a bonding or hot pressing mode.
Further, the thickness of the flexible reinforcing portion is equal to or similar to the depth of the recessed region in the thickness direction of the elastic body, the upper surface of the elastic body is flush with the upper surface of the flexible reinforcing portion, and the insulating layer is attached to the upper surface of the elastic body and the upper surface of the flexible reinforcing portion.
Further, the insulating layer and the flexible reinforcing part are respectively made of flexible materials with the same or different materials.
Further, the insulating layer and/or the flexibility enhancing portion is made of a polyimide material.
Further, the elastic body is a metal supporting plate.
Further, the elastomer includes upper surface and the lower surface of relative setting, the elastomer includes from the lower surface upwards sunken depressed region that forms, the depressed region is located the butt joint region, the elastomer still includes and is located the reservation portion of depressed region top, flexibility enhancing part with reservation portion abutment setting.
Further, the driving mechanism further comprises a reinforcing plate, the reinforcing plate is filled in the concave area, and the reinforcing plate is attached to the lower surface of the retaining part and the lower surface of the flexible reinforcing part.
Further, the insulating layer extends beyond the edge of the elastomer, and the insulating layer is attached to the upper surface of the elastomer and the upper surface of the flexibility enhancing portion.
Further, the driving mechanism further comprises a connector, the connector comprises a plurality of connecting terminals, and the connecting terminals and the connecting sheets of the conductive circuit layer are arranged in one-to-one correspondence and are connected together.
Further, the driving mechanism further comprises a guard plate, the guard plate is arranged corresponding to the connector in the thickness direction of the insulating layer, and the insulating layer is arranged between the connector and the guard plate.
Further, the driving mechanism further comprises a protection layer arranged on the conductive circuit layer, the protection layer is located in the installation area and the butt joint area, the protection layer extends beyond the elastic body in the direction from the installation area to the butt joint area, and the connecting sheet is exposed out of the protection layer.
The second technical scheme adopted by the invention for solving the problems in the prior art is as follows:
a drive mechanism assembly, comprising:
an image sensor assembly including an image sensor and an anti-shake coil; and
the driving mechanism as described above, wherein the image sensor assembly is mounted and electrically connected to the mounting unit of the driving mechanism, and the driving mechanism drives the image sensor assembly to move.
Further, the image sensor further comprises a bearing piece, and the image sensor assembly is formed after the image sensor and the anti-shake coil are mounted on the bearing piece.
Further, the carrier is a flexible circuit board or a ceramic substrate.
The third technical scheme adopted by the invention for solving the problems in the prior art is as follows:
a camera module, comprising:
a voice coil motor including a magnet; and
in combination with the driving mechanism described above, the magnet and the anti-shake coil generate a driving force for driving the image sensor assembly to move.
The fourth technical scheme adopted by the invention for solving the problems in the prior art is as follows:
an electronic device comprises the camera module and the main circuit board, wherein the connecting piece of the driving mechanism of the camera module is electrically connected with the main circuit board.
The invention has the beneficial effects that: in the invention, the insulating layer and the conductive circuit layer of the driving mechanism extend beyond the elastomer in the direction from the mounting area to the butt joint area, the conductive circuit layer on the upper side of the insulating layer is directly and electrically connected with the main circuit board, a flexible circuit board connected between the driving mechanism and the main circuit board is omitted, the welding process between the driving mechanism and the main circuit board and the flexible circuit board is omitted, the assembly process is simplified, the assembly cost is reduced, the stability of the electrical connection is improved, the signal loss is reduced, the signal transmission performance is improved, the mounting space of the flexible circuit board is saved, and the light and thin integrated design of products is facilitated.
Drawings
The above object, technical solution and beneficial effects of the invention can be achieved by the following drawings:
fig. 1 is a schematic structural view of a driving mechanism according to a first embodiment of the present invention;
FIG. 2 is a schematic view of the drive mechanism of FIG. 1 from another perspective;
FIG. 3 is an exploded perspective view of the drive mechanism of FIG. 1;
FIG. 4 is an enlarged view of the circled portion illustrated in FIG. 1;
FIG. 5 is a partial cross-sectional view taken along the direction A-A of FIG. 1;
fig. 6 is a partial enlarged view of fig. 5.
Fig. 7 is a schematic structural view of a driving mechanism according to a second embodiment of the present invention;
FIG. 8 is a schematic view of the drive mechanism of FIG. 7 from another perspective;
FIG. 9 is an exploded perspective view of the drive mechanism of FIG. 7;
FIG. 10 is an enlarged view of the circled portion illustrated in FIG. 7;
FIG. 11 is a partial cross-sectional view taken along the direction B-B in FIG. 7;
fig. 12 is a partial enlarged view of fig. 11.
Fig. 13 is a schematic structural view of a driving mechanism of a third embodiment of the present invention;
FIG. 14 is a schematic view of the drive mechanism of FIG. 13 from another perspective;
FIG. 15 is an exploded perspective view of the drive mechanism of FIG. 13;
FIG. 16 is an enlarged view of the circled portion illustrated in FIG. 13;
FIG. 17 is a partial cross-sectional view taken along the direction C-C of FIG. 13;
fig. 18 is a schematic structural view of a driving mechanism of a fourth embodiment of the present invention;
FIG. 19 is a schematic view of the drive mechanism of FIG. 18 from another perspective;
FIG. 20 is an exploded perspective view of the drive mechanism of FIG. 18;
FIG. 21 is an enlarged view of the circled portion illustrated in FIG. 18;
fig. 22 is a sectional view taken along the direction D-D shown in fig. 18.
Description of main reference numerals:
the driving mechanism 100, the mounting area 101, the docking area 102, the mounting unit 103, the flexible circuit portion 104, the first flexible circuit portion 1041, the second flexible circuit portion 1042, the external fixing unit 105, the elastic body 10, the upper surface 11, the lower surface 12, the retaining portion 13, the depressed area 14, the insulating layer 20, the main body portion 21, the flexible extension 22, the conductive wiring layer 30, the connection piece 31, the conductive sheet 32, the conductive wiring 33, the protection layer 40, the flexible reinforcing portion 50, the reinforcing plate 60, the connector 70, the solder terminal 71, the protection plate 80, and the adhesive layer 90.
Detailed Description
The invention is described in further detail below with reference to the drawings of embodiments.
As shown in fig. 1 to 22, the driving mechanism 100 provided by the embodiments of the present invention is used for installing an image sensor assembly (not shown) and driving the image sensor assembly to move along a horizontal X, Y axis and a vertical Z axis, and even rotate around X, Y or the Z axis in all directions, and the driving mechanism 100 of the present invention can be installed below a voice coil motor to form a camera module together after being matched with the image sensor assembly, so as to achieve a better anti-shake function of the camera module by controlling the displacement of the image sensor. The driving mechanism 100 includes a mounting region 101 and a docking region 102 provided on one side of the mounting region 101. The mounting area 101 is generally rectangular or square in overall. The mounting region 101 is provided with a rectangular mounting unit 103, a flexible circuit portion 104 surrounding the periphery of the rectangular mounting unit 103, and an external fixing unit 105 surrounding the flexible circuit portion 104. The image sensor assembly is an assembly including an image sensor, for example, the image sensor and the anti-shake coil may be included, and the image sensor and the anti-shake coil are first mounted on a carrier such as a Flexible Printed Circuit (FPC) or a ceramic substrate to form an assembly, or the image sensor and the anti-shake coil may be mounted on the mounting unit 103 in a separate manner. The image sensor assembly is mechanically mounted and electrically connected to the rectangular mounting unit 103. The mounting unit 103 is a movable unit, and can drive the flexible circuit portion 104 to move along with the image sensor assembly relative to the external fixing unit 105 in the moving process of the image sensor assembly, and the flexible circuit portion 104 includes a plurality of elastic arms (not numbered) arranged at intervals, which are elastically deformed in the moving process of the mounting unit 103 so as to provide an elastic deformation force. In this embodiment, the mounting unit 103 has a hollow frame structure, but the shape and structure thereof may be adjusted according to the practical situation in the implementation, and is not particularly limited, and the mounting unit 103 may have a solid rectangular or square structure. The external fixing unit 105 is a stationary unit, and may be directly or indirectly fixed to a device (not shown), and a portion of the driving mechanism 100 corresponding to the docking area 102 is disposed on the external fixing unit 105. The external fixation unit 105 may be a closed frame-type structure or other structure, such as a U-type structure with one side open. The portion of the driving mechanism 100 located in the docking area 102 is directly electrically connected to a main circuit board (PCB, not shown) that provides driving signals for the driving mechanism 100.
As shown in fig. 1 to 6, in a first embodiment of the present invention, a portion of the driving mechanism 100 located in the mounting area 101 and the butt-joint area 102 is a layered structure, which includes an elastic body 10, an insulating layer 20 disposed on the elastic body 10, a conductive circuit layer 30 disposed on the insulating layer 20, and a protective layer 40 disposed on the conductive circuit layer 30. The insulating layer 20 includes a main body portion 21 and a flexible extension portion 22, and the flexible extension portion 22 is provided in the same layer as the main body portion 21. The main body 21 is disposed corresponding to the mounting region 101, and the flexible extension 22 is disposed corresponding to the docking region 102. The material of the main body 21 and the material of the flexible extension 22 may be the same or different. Alternatively, the body portion 21 and the flexible extension 22 may be of unitary construction, i.e., the flexible extension 22 integrally extends from the body portion 21. The elastomer 10, the insulating layer 20, the conductive circuit layer 30 and the protective layer 40 are all located in the mounting area 101 and the butt-joint area 102. The insulating layer 20, the conductive circuit layer 30 and the protective layer 40 extend beyond the elastic body 10 in the direction from the mounting region 101 to the abutting region 102, and a portion of the conductive circuit layer 30 beyond the elastic body 10 includes a plurality of connection pads 31 exposed outside the protective layer 40.
In the prior art, the insulation layer extends outwards beyond the elastomer, the flexibility of the part which is not supported by the elastomer is weaker, the whole flexible supporting requirements of the extended insulation layer, the conductive circuit layer and the protective layer cannot be met, and the part of the insulation layer, the conductive circuit layer and the protective layer beyond the elastomer is easy to bend and even break and lose efficacy in the use process of the image sensor driving mechanism.
In comparison with the prior art, in the present invention, it is considered that the portion of the butt-joint region 102 beyond the elastic body 10 is enhanced in flexibility, thereby improving the overall flexibility of the portion of the butt-joint region 102 beyond the elastic body 10.
In the first embodiment of the present invention, the elastic body 10 includes an upper surface 11 and a lower surface 12 disposed opposite to each other, and the elastic body 10 includes a concave region 14 formed by recessing downward from the upper surface 11, where the concave region 14 is located in the abutting region 102. The drive mechanism 100 further includes a flexible reinforcement 50, the flexible reinforcement 50 being disposed separate from the flexible extension 22 and affixed beneath the flexible extension 22. The flexible reinforcing portion 50 is filled in the concave region 14 and extends out of the concave region 14, the flexible reinforcing portion 50 is attached to the inner wall of the concave region 14 by means of adhesion or hot pressing, for example, the flexible reinforcing portion 50 is attached to the inner wall of the concave region 14 by means of an adhesive layer 90, and the flexible reinforcing portion 50 mainly plays a role in reinforcing strength for the flexible extension portion 22 located in the butt joint region 102. Since the thickness of the flexible reinforcing portion 50 is equal to or similar to the depth of the recessed portion 14 in the thickness direction of the elastic body 10, the similar means that the thickness of the flexible reinforcing portion 50 is not more than 10% different from the depth of the recessed portion 14, and the recessed portion 14 is used for accommodating glue, the depth of the recessed portion 14 is greater than the thickness of the flexible reinforcing portion 50. The upper surface of the flexible reinforcement 50 is flush with the upper surface of the elastic body 10, and the insulation layer 20 is attached to the upper surface of the elastic body 10 and the upper surface of the flexible reinforcement 50, and the thickness of the flexible reinforcement 50 may be greater than, less than, or equal to the thickness of the insulation layer 20. The insulating layer 20 and the flexible reinforcing portion 50 are made of flexible materials which are the same or different, respectively. In this embodiment, the material of the insulating layer 20 and the material of the flexible reinforcing portion 50 may be the same as each other, and thus the manufacturing cost is reduced, for example, when the material of the insulating layer 20 and the material of the flexible reinforcing portion 50 are the same as each other, they may be Polyimide (PI) films, and in this case, in order to enhance the strength of the flexible reinforcing portion 50 and make the structural strength thereof larger than that of the insulating layer 20, the thickness of the flexible reinforcing portion 50 is larger than or equal to that of the insulating layer 20. In another preferred embodiment, the material of the insulating layer 20 and the material of the flexible reinforcement portion 50 may be different, for example, the insulating layer 20 may be a Polyimide (PI) film, the flexible reinforcement portion 50 may be an Epoxy Resin (Epoxy Resin) film or a metal film, and the metal material may be aluminum or stainless steel, so that the material hardness of the flexible reinforcement portion 50 is higher than that of the insulating layer 20, the flexibility is stronger, and the thickness of the flexible reinforcement portion 50 may be less than or equal to that of the insulating layer 20, but the structural strength of the flexible reinforcement portion may still be higher than that of the insulating layer 20, and at this time, the recess depth of the recess region 14 may be reduced, so as to further ensure the structural strength of the elastomer 10 in the butt joint region 102. The conductive circuit layer 30 is formed on the surface of the insulating layer 20 through a metallization process, the conductive circuit layer 30 includes a plurality of conductive circuits 33, a plurality of connection pads 31 and a plurality of conductive pads 32 that are connected to the plurality of conductive circuits 33 in a one-to-one correspondence manner, the plurality of connection pads 31 are disposed at outer ends (i.e., free ends) of the docking area 102, and the plurality of conductive pads 32 are disposed at the rectangular mounting unit 103, where the metallization process includes, but is not limited to, etching, electroplating, electroless plating, and the like. In this embodiment, the conductive circuit layer 30 is formed by chemical plating and etching. Specifically, a conductive metal film (a precursor of the conductive wiring layer 30) is plated on the insulating layer 20; pressing a dry film on the conductive metal film to mask the place where the conductive line 33 is required to be formed; and (3) exposure and development: etching away places other than the conductive lines 33; finally, the dry film is removed by etching, leaving the desired conductive traces 33, and the final conductive trace layer 30 is formed. After the conductive circuit layer 30 is formed, the connection piece 31 of the conductive circuit layer 30 is directly and electrically connected with the connection piece of the main circuit board in the butt joint area 102, and the electrical connection can be formed in a welding mode or in other modes such as plugging; the conductive sheet 32 is electrically connected to pins of the image sensor assembly at the rectangular mounting unit 103. The protection layer 40 is disposed on the conductive circuit layer 30, the plurality of connection pads 31 and the plurality of conductive pads 32 of the conductive circuit layer 30 are exposed outside the protection layer 40, when the conductive circuit layer 30 needs to be soldered, the protection layer 40 prevents solder from running onto the conductive circuit 33 when the conductive circuit layer 30 is soldered, and the protection layer 40 can also prevent the conductive circuit 33 from being oxidized due to exposure to air. In this embodiment, the elastic body 10 is a metal support plate made of copper, titanium, high carbon steel or stainless steel, and has both elastic support and grounding conductive function, and in other embodiments, the elastic body 10 may be made of other materials, such as plastic, and only has elastic support function. In this embodiment, the thicknesses of the flexible reinforcement portion 50 and the insulating layer 20 are 5um-50um, and in other embodiments, the thicknesses of the two may be different based on the difference of the materials of the two, and different thickness settings may be selected to adapt to the respective elastic requirements.
As shown in fig. 7 to 12, in a driving mechanism 100 according to a second embodiment of the present invention, portions of the driving mechanism 100 located in a mounting area 101 and a butt-joint area 102 are both in a layered structure, and the driving mechanism includes an elastic body 10, an insulating layer 20 disposed on the elastic body 10, a conductive circuit layer 30 disposed on the insulating layer 20, and a protective layer 40 disposed on the conductive circuit layer 30. The insulating layer 20 includes a main body 21 and a flexible extension 22, the flexible extension 22 and the main body 21 are arranged in the same layer, the main body 21 is arranged corresponding to the mounting area 101, and the flexible extension 22 is arranged corresponding to the butt joint area 102. The material of the main body 21 and the material of the flexible extension 22 may be the same or different. Alternatively, the body portion 21 and the flexible extension 22 may be of unitary construction, i.e., the flexible extension 22 integrally extends from the body portion 21. The elastic body 10, the insulating layer 20, the conductive circuit layer 30 and the protective layer 40 are all located in the mounting area 101 and the butt joint area 102, the insulating layer 20, the conductive circuit layer 30 and the protective layer 40 extend beyond the elastic body 10 in the direction from the mounting area 101 to the butt joint area 102, and the part of the conductive circuit layer 30 beyond the elastic body 10 comprises a plurality of connecting sheets 31 exposed outside the protective layer 40.
The elastic body 10 includes an upper surface 11 and a lower surface 12 disposed opposite to each other, the elastic body 10 includes a recess 14 formed by recessing upward from the lower surface 12, the recess 14 is located in the abutting region 102, the driving mechanism 100 further includes a reinforcing plate 60, and the reinforcing plate 60 is filled in the recess 14. The elastomer 10 further comprises a retention portion 13 located above the recessed region 14, the sum of the depth of the recessed region 14 and the thickness of the retention portion 13 being equal to the thickness of the elastomer 10. The driving mechanism 100 further includes a flexible enhancing portion 50, where the flexible enhancing portion 50 is disposed adjacent to the retaining portion 13, for example, the flexible enhancing portion 50 and the retaining portion 13 may be directly attached (i.e., a side surface of the flexible enhancing portion 50 is directly attached to a side surface of the retaining portion 13); or the flexible reinforcing part 50 and the retaining part 13 are adjacently arranged and combined with each other, for example, the flexible reinforcing part 50 and the retaining part 13 are combined by a mechanical combination mode such as a dovetail groove, and the combination mode is stronger in combination. Since the thickness of the flexible reinforcing portion 50 is equal to or similar to the thickness of the retaining portion 13, the upper surface of the flexible reinforcing portion 50 is substantially at the same height as the upper surface of the retaining portion 13, the lower surface of the flexible reinforcing portion 50 is substantially at the same height as the lower surface of the retaining portion 13, the insulating layer 20 is attached to the upper surface of the elastic body 10 and the upper surface of the flexible reinforcing portion 50, and the reinforcing plate 60 is attached to the lower surface of the retaining portion 13 and the lower surface of the flexible reinforcing portion 50, in this embodiment, the reinforcing plate 60 is a stainless steel plate, the reinforcing plate 60 does not need to be elastic, only the retaining portion 13 and the flexible reinforcing portion 50 need to be supported, especially, the strength of the position where the retaining portion 13 abuts the flexible reinforcing portion 50 is weak, the strength is improved by the support, and the occurrence of a fracture condition is prevented. In this embodiment, the insulation layer 20 may be attached to the upper surface of the elastic body 10, and then the flexibility enhancing portion 50 may be attached to the lower surface of the insulation layer 20, so that the flexibility enhancing portion 50 is disposed adjacent to the retaining portion 13. As also described in the first embodiment, the insulating layer 20 and the flexible reinforcing portion 50 of the present embodiment may also be made of the same or different materials, thicknesses, and combinations thereof.
As shown in fig. 13 to 17, in a driving mechanism 100 according to a third embodiment of the present invention, portions of the driving mechanism 100 located in a mounting area 101 and a butt-joint area 102 are both in a layered structure, and include an elastic body 10, an insulating layer 20 disposed on the elastic body 10, a conductive circuit layer 30 disposed on the insulating layer 20, and a protective layer 40 disposed on the conductive circuit layer 30. The insulating layer 20 includes a main body 21 and a flexible extension 22, the flexible extension 22 and the main body 21 are arranged in the same layer, the main body 21 is arranged corresponding to the mounting area 101, and the flexible extension 22 is arranged corresponding to the butt joint area 102. The material of the main body 21 and the material of the flexible extension 22 may be the same or different. Alternatively, the body portion and the flexible extension portion may be of unitary construction, i.e., the flexible extension portion 22 integrally extends from the body portion 21. The elastic body 10, the insulating layer 20, the conductive circuit layer 30 and the protective layer 40 are all located in the mounting area 101 and the butt joint area 102, the insulating layer 20, the conductive circuit layer 30 and the protective layer 40 extend beyond the elastic body 10 in the direction from the mounting area 101 to the butt joint area 102, and the part of the conductive circuit layer 30 beyond the elastic body 10 comprises a plurality of connecting sheets 31 exposed outside the protective layer 40.
In this embodiment, the insulating layer 20 extends beyond the edge of the elastomer 10, the connection pieces 31 of the conductive circuit layer 30 are attached to the upper surface of the portion of the insulating layer 20 beyond the elastomer 10, the thickness of the insulating layer 20 is 50um-200um, the material of the insulating layer 20 is a flexible material, for example, the material of the insulating layer 20 is Polyimide (PI) or carbon fiber. In the third embodiment, the thickness of the insulating layer 20 is mainly controlled to be the same as and relatively thicker than the thickness of the flexible extension portion 22 in the main body portion 21, so that the rigidity of the portion beyond the elastic body 10 can be enhanced, but the elastic stress of the main body portion 21 in the mounting region 101 becomes larger, at this time, the driving mechanism 100 is more suitable for a product with low requirement on the movement accuracy of the image sensor assembly, and of course, the thickness of the main body portion 21 of the insulating layer 20 can be made thinner by controlling the manufacturing process, and the thickness of the flexible extension portion 22 is relatively thicker, so that the thickness of the flexible extension portion 22 can be further increased under the condition that the elastic stress of the main body portion 21 in the mounting region 101 is unchanged, but the manufacturing process in this way is more complex and the manufacturing cost is higher.
As shown in fig. 18 to 22, in a driving mechanism 100 according to a fourth embodiment of the present invention, portions of the driving mechanism 100 located in a mounting area 101 and a butt-joint area 102 are both in a layered structure, and include an elastic body 10, an insulating layer 20 disposed on the elastic body 10, a conductive circuit layer 30 disposed on the insulating layer 20, and a protective layer 40 disposed on the conductive circuit layer 30. The insulating layer 20 includes a main body 21 and a flexible extension 22, the flexible extension 22 and the main body 21 are arranged in the same layer, the main body 21 is arranged corresponding to the mounting area 101, and the flexible extension 22 is arranged corresponding to the butt joint area 102. The material of the main body 21 and the material of the flexible extension 22 may be the same or different. Alternatively, the body portion and the flexible extension portion may be of unitary construction, i.e., the flexible extension portion 22 integrally extends from the body portion 21. The elastic body 10, the insulating layer 20, the conductive circuit layer 30 and the protective layer 40 are all located in the mounting area 101 and the butt joint area 102, the insulating layer 20, the conductive circuit layer 30 and the protective layer 40 extend beyond the elastic body 10 in the direction from the mounting area 101 to the butt joint area 102, and the part of the conductive circuit layer 30 beyond the elastic body 10 comprises a plurality of connecting sheets exposed outside the protective layer 40.
The drive mechanism 100 further includes a connector 70, the connector 70 including a plurality of solder terminals 71. The connector 70 is electrically connected between the main wiring board and the conductive wiring layer 30. In this embodiment, the connector 70 is disposed on the upper side of the portion of the insulating layer 20 not attached by the conductive trace layer 30 and the protective layer 40; in other embodiments, the connector 70 may also be disposed on the underside of the portion of the insulating layer 20 that extends beyond the elastomer 10. In the direction from the mounting region 101 to the mating region 102, the conductive trace layer 30 extends beyond the protective layer 40, the insulating layer 20 extends beyond the conductive trace layer 30, and the connector 70 is located on a portion of the insulating layer 20 beyond the conductive trace layer 30. The driving mechanism 100 further includes a cover 80, the cover 80 being disposed corresponding to the connector 70 in a thickness direction of the insulating layer 20, the insulating layer 20 being disposed between the connector 70 and the cover 80. The guard plate 80 is made of metal to provide rigid support for the connector 70, so that the connector 70 is convenient to weld and insert and pull, and the guard plate 80 can also have the function of electrifying and grounding. The conductive circuit layer 30 includes a plurality of conductive circuits 33, a plurality of connection pads 31 and a plurality of conductive pads 32, which are connected to the plurality of conductive circuits 33 in a one-to-one correspondence manner, the plurality of connection pads 31 are disposed at the outer end of the docking area 102, and the plurality of conductive pads 32 are disposed at the rectangular mounting unit 103. After the conductive circuit layer 30 is formed, the connection pieces 31 of the conductive circuit layer 30 are arranged in a one-to-one correspondence manner with the welding terminals 71 of the connector 70 in the butt joint area 102 and are connected together to form electrical connection, and the electrical connection can be formed in a welding manner or in other manners such as plugging; the conductive sheet 32 is electrically connected to pins of the image sensor at the rectangular mounting unit 103. The protection layer 40 is disposed on the conductive circuit layer 30, the plurality of connection pads 31 and the plurality of conductive pads 32 of the conductive circuit layer 30 are exposed outside the protection layer 40, when the conductive circuit layer 30 needs to be soldered, the protection layer 40 prevents solder from running onto the conductive circuit 33 when the conductive circuit layer 30 is soldered, and the protection layer 40 can also prevent the conductive circuit 33 from being oxidized due to exposure to air.
The present invention also provides a drive mechanism assembly comprising: an image sensor unit including an image sensor (not shown) and an anti-shake coil (not shown), and the driving mechanism 100. The image sensor assembly is mounted and electrically connected to the mounting unit 103 of the driving mechanism 100, and the driving mechanism 100 drives the image sensor assembly to move. The image sensor assembly may further include a carrier (not shown), and the image sensor and the anti-shake coil are mounted on the carrier to form the image sensor assembly, wherein the carrier may be a flexible circuit board or a ceramic substrate.
The invention also provides a camera module, comprising: a voice coil motor including a magnet; and the driving mechanism is combined, and the magnet and the anti-shake coil generate force for driving the image sensor assembly to move.
The invention also provides an electronic device, which comprises the camera module and a main circuit board, wherein the connecting piece 31 of the driving mechanism 100 of the camera module is electrically connected with the main circuit board, and the electronic device can be intelligent devices such as a mobile phone, a computer and the like.
In the invention, the insulating layer 20 of the driving mechanism 100 comprises the main body part 21 and the flexible extension part 22, the flexible extension part 22 is directly and integrally extended from the main body part 21, welding connection is not needed, the connecting sheet 31 of the conductive circuit layer 30 on the upper side of the flexible extension part 22 is directly connected with the connecting sheet of the main circuit board, an intermediate connecting piece of a flexible circuit board (FPC) connected between the driving mechanism 100 and the main circuit board is omitted, the welding flow between the driving mechanism 100 and the main circuit board and the flexible circuit board respectively is omitted, the assembly process is simplified, the assembly cost is reduced, the stability of electric connection is improved, the signal loss is reduced, the signal transmission performance is improved, the installation space of the flexible circuit board is saved, and the light, thin and integrated design of products is facilitated. The driving mechanism 100 further includes a flexible reinforcing portion 50, where the flexible reinforcing portion 50 is disposed on the lower side of the flexible extension portion 22 of the insulating layer 20 in the docking area 102 and attached to the flexible extension portion 22, and the flexible reinforcing portion 50 mainly plays a role in reinforcing strength for the flexible extension portion 22 in the docking area 102.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples merely illustrate embodiments of the invention and are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (19)
1. The utility model provides a driving mechanism for drive image sensor subassembly motion, driving mechanism include the installation region and set up in the butt joint region of installation region one side, the installation region is including being used for installing and electric connection the installation unit of image sensor subassembly, its characterized in that, driving mechanism include elastomer, flexible reinforcing portion, set up in insulating layer on the elastomer and set up in conductive line layer on the insulating layer, the elastomer insulating layer with conductive line layer all is located the installation region with the butt joint region, insulating layer with conductive line layer in the installation region extremely in the direction of butt joint region extends beyond the elastomer, conductive line layer surpass the part of elastomer includes a plurality of connection pieces, the installation region is still including being located flexible circuit portion and being located in flexible circuit portion outlying outside fixed unit, the installation unit can relative outside fixed unit takes place to move into and drive flexible circuit portion takes place elastic deformation, the butt joint region set up in outside fixed unit, extension fixed unit metal support plate is in the extension is corresponding to flexible portion with flexible portion is the extension flexible portion sets up in the extension flexible portion is corresponding to flexible portion the flexible portion.
2. The drive mechanism of claim 1, wherein the body portion is the same material as and integrally connected to the flexible extension.
3. The drive mechanism of claim 1, wherein the elastomer includes an upper surface and a lower surface disposed opposite each other, the elastomer includes a recessed region recessed downwardly from the upper surface, the recessed region is located in the docking region, and the flexible reinforcement fills the recessed region and extends out of the recessed region.
4. The drive mechanism of claim 1, wherein the insulating layer has a thickness of 5um to 200um and the flexibility enhancing portion has a thickness of 5um to 50um.
5. A driving mechanism according to claim 3, wherein the flexible reinforcement is attached to the inner wall of the recessed area by means of adhesion or heat pressing.
6. A driving mechanism according to claim 3, wherein the thickness of the flexible reinforcing portion is equal to or similar to the depth of the recessed region in the thickness direction of the elastic body, the upper surface of the elastic body is flush with the upper surface of the flexible reinforcing portion, and the insulating layer is attached to the upper surface of the elastic body and the upper surface of the flexible reinforcing portion.
7. The driving mechanism according to claim 1, wherein the insulating layer and the flexibility enhancing portion are made of flexible materials which are the same or different, respectively.
8. The drive mechanism of claim 1, wherein the insulating layer and/or the flexibility enhancing portion is made of a polyimide material.
9. The drive mechanism of claim 1, wherein the elastomer includes oppositely disposed upper and lower surfaces, the elastomer including a recessed region recessed upwardly from the lower surface, the recessed region being located in the interface region, the elastomer further including a retention portion located above the recessed region, the flexible reinforcement portion being disposed adjacent the retention portion.
10. The drive mechanism of claim 9, further comprising a reinforcing plate filling the recessed area, the reinforcing plate being attached to a lower surface of the retaining portion and a lower surface of the flexible reinforcing portion.
11. The drive mechanism of claim 9, wherein the insulating layer extends beyond an edge of the elastomer, the insulating layer being attached to the upper surface of the elastomer and an upper surface of the flex-enhancing portion.
12. The drive mechanism of claim 1, further comprising a connector including a plurality of connection terminals disposed in one-to-one correspondence with and connected together with the plurality of connection pads of the conductive trace layer.
13. The drive mechanism according to claim 12, further comprising a shield plate provided in a thickness direction of the insulating layer corresponding to the connector, the insulating layer being provided between the connector and the shield plate.
14. The drive mechanism of claim 1, further comprising a protective layer disposed on the conductive trace layer, the protective layer being located at the mounting region and the docking region, the protective layer extending beyond the elastomer in a direction from the mounting region to the docking region, the connecting tab being exposed outside the protective layer.
15. A drive mechanism assembly, comprising:
an image sensor assembly including an image sensor and an anti-shake coil; and
the drive mechanism of any one of claims 1-14, wherein the image sensor assembly is mounted and electrically connected to the mounting unit of the drive mechanism, the drive mechanism driving the image sensor assembly in motion.
16. The drive mechanism of claim 15, further comprising a carrier, the image sensor assembly being formed after the image sensor and the anti-shake coil are mounted to the carrier.
17. The image sensor driving mechanism assembly according to claim 16, wherein the carrier is a flexible circuit board or a ceramic substrate.
18. A camera module, comprising:
a voice coil motor including a magnet; and
the drive mechanism of any one of claims 15 to 17, wherein the magnet and the anti-shake coil generate a drive force for driving the image sensor assembly.
19. An electronic device comprising the camera module of claim 18 and a main circuit board, wherein the connection piece of the driving mechanism of the camera module is electrically connected to the main circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210103626.XA CN114422681B (en) | 2022-01-27 | 2022-01-27 | Driving mechanism, driving mechanism combination, camera module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210103626.XA CN114422681B (en) | 2022-01-27 | 2022-01-27 | Driving mechanism, driving mechanism combination, camera module and electronic equipment |
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| CN114422681A CN114422681A (en) | 2022-04-29 |
| CN114422681B true CN114422681B (en) | 2023-06-23 |
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| CN202210103626.XA Active CN114422681B (en) | 2022-01-27 | 2022-01-27 | Driving mechanism, driving mechanism combination, camera module and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115038232B (en) * | 2022-06-21 | 2023-12-08 | 苏州杰腾电子有限公司 | Structure and method for enhancing contact strength of electronic circuit surface |
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| CN114422681A (en) | 2022-04-29 |
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