CN218956987U - Base and lens driving mechanism - Google Patents

Abstract

The utility model discloses a base and a lens driving mechanism, wherein the base comprises a plate body, a plurality of metal strips and a chip, the plate body is annular, a protective shell is embedded in the plate body, one of the bottom surface or the top surface of the protective shell is provided with a mounting groove, and the other surface of the protective shell is provided with a plurality of ventilation holes communicated with the mounting groove. The metal strips are positioned in the plate body, and part of connecting ends of the metal strips are exposed in the mounting grooves and correspond to the air holes. The chip is positioned in the mounting groove and is electrically connected with the connecting end of the metal strip. The base is formed by two times of injection molding, the protective shell is formed by the first time of injection molding, the protective shell presses the chip connecting end by using the clamp in the injection molding process, the chip connecting end is prevented from moving or misplacement in the injection molding process, the chip connecting end is ensured to be at a preset position, and the accuracy of electric connection with the chip is improved.

Description

Base and lens driving mechanism

Technical Field

The present utility model relates to the field of optical driving, and in particular, to a base and a lens driving mechanism.

Background

In recent years, along with the development of technology, many electronic devices have photographing or video recording functions. The use of these electronic devices is becoming more and more popular and is evolving towards a convenient and light-weight design that provides users with more options.

In practice, in order to adapt to photographing of various scenes, the lens needs to be continuously focused, and lens shake needs to be prevented during focusing or photographing. In the prior art, a lens is driven to move in three dimensions, i.e., in an optical axis direction and in two mutually perpendicular directions perpendicular to the optical axis by a lens driving device, wherein the lens moves in the optical axis direction mainly for focusing, and the lens moves in the direction perpendicular to the optical axis for anti-shake. In the prior art, the lens driving mechanism comprises a shell, a base, a circuit board, a frame, a carrier, an upper reed and a lower reed, wherein the shell and the base are matched to form an accommodating space, a metal strip is arranged in the base, the metal strip is communicated with an embedded circuit of the base, and the circuit board is stacked to the top surface of the base. The frame is movably connected to the top of the base and positioned in the accommodating space, and the magnet group is arranged on the frame. The carrier is provided with a coil which can be movably connected with the frame, and the coil on the carrier can be matched with the magnet group to drive the carrier to move along the optical axis direction after being electrified. The upper reed is connected to the top of carrier and frame, and the lower reed is connected to the bottom of carrier and frame, and upper reed and lower reed cooperation can make carrier and frame elastic connection, and the carrier is moved back along the optical axis, and upper reed and lower reed can assist the carrier to reset.

A plurality of groups of coils are arranged in the circuit board, and a built-in circuit of the base is electrically connected with the coils in the circuit board. In addition, a plurality of chips are arranged in the base to control the power-off or power-on condition of the coils in the circuit board. In the injection molding process of the base, a chip mounting position is required to be reserved, and part of connecting ends of the built-in circuits are exposed to the chip mounting position, so that the chip can be conveniently mounted, and the chip is electrically connected with the built-in circuits of the base. In order to ensure accurate connection between the chip and the built-in circuit, a base processing method is needed to improve injection molding precision of the mounting position of the chip and ensure accurate connection between the chip and the built-in circuit.

Disclosure of Invention

The utility model aims to provide a base, a processing method of the base and a lens driving mechanism, wherein the base is subjected to injection molding twice so as to ensure the accurate electric connection between a chip and a metal strip in the base.

In order to solve the above technical problems, the present utility model provides a base, including:

the plate body is annular, a protective shell is embedded in the plate body, one surface of the bottom surface or the top surface of the protective shell is provided with a mounting groove, and the other surface of the protective shell is provided with a plurality of air holes communicated with the mounting groove;

the metal strips are positioned in the plate body, and the connecting ends of part of the metal strips are exposed in the mounting grooves and are arranged corresponding to the air holes; and

and the chip is positioned in the mounting groove and is electrically connected with the metal strip positioned in the mounting groove.

In one embodiment, the mounting groove is located at the bottom surface of the protective housing, and the ventilation hole is located at the top surface of the protective housing. In one embodiment, the shape of the plurality of ventilation holes is the same as the shape of the plurality of connection ends, respectively.

In one embodiment, the top surface of the protective shell is flush with the top surface of the plate.

In one embodiment, the plate body is rectangular, the two protecting shells are located at two adjacent sides of the plate body, and the two chips are respectively installed in the installation grooves of the two protecting shells.

In one embodiment, the device further comprises two sensors, wherein the two sensors are respectively positioned in the two mounting grooves and are electrically connected with part of the connecting ends.

In one embodiment, the ends of four of the plurality of metal strips are exposed to the top surface of the bottom plate and are located at four corners, respectively.

The present utility model also relates to a lens driving mechanism comprising:

the base is provided with a plurality of grooves,

a housing connected to an outer circumference of the base and forming an accommodating space;

the circuit board covers the top surface of the base and is internally provided with a first group of coils, and the first group of coils are electrically connected with the metal strip;

the frame is positioned in the annular accommodating space, the frame is provided with a magnet group, and the magnet group is matched with the first group of coils to drive the frame to move along the direction perpendicular to the optical axis;

the carrier is used for mounting the lens, is provided with a second group of coils and can be movably mounted in the frame, and the second group of coils can drive the carrier to move along the optical axis direction by matching with the magnet group;

the bottom ends of the suspension wires are electrically connected with the metal strips, and the top ends of the suspension wires are electrically connected with the second group of coils;

the upper reed and the lower reed are respectively elastic, two ends of the upper reed are respectively connected with the carrier and the top of the frame, two ends of the lower reed are respectively connected with the carrier and the bottom of the frame, and the upper reed and the lower reed are matched to enable the carrier to be elastically connected with the frame.

The base is formed by two times of injection molding, the protective shell is formed by the first time of injection molding, the protective shell presses the chip connecting end by using the clamp in the injection molding process, the chip connecting end is prevented from moving or misplacement in the injection molding process, the chip connecting end is ensured to be at a preset position, and the accuracy of electric connection with the chip is improved.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is an exploded view of a lens driving mechanism according to an embodiment of the present utility model.

Fig. 2 is an assembly view of the lens driving mechanism of the embodiment shown in fig. 1.

Fig. 3 and 4 are assembled views of the frame and carrier of the embodiment of fig. 1.

Figure 5 is an assembled view of the frame, carrier and lower reed of the embodiment of figure 1.

Fig. 6 is an assembled view of the base and suspension wires of the embodiment shown in fig. 1.

Fig. 7 and 8 are perspective views of the metal strip and protective case of the embodiment shown in fig. 1.

Reference numerals: 100. a lens driving mechanism; 1. a housing; 2. a base; 21. a plate body; 22. a metal strip; 221. a chip connection end; 222. a protective shell; 223. ventilation holes; 23. a chip; 24. a sensor; 25. a second damping gel; 3. a circuit board; 4. a frame; 41. a magnet group; 5. a carrier; 51. a first damping gel; 6. an upper reed; 7. a lower reed; 8. a suspension wire; 9. a circuit board.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the utility model, numerous specific details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.

In the following description, for the purposes of explanation of various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment may be practiced without one or more of the specific details. In other instances, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and variations such as "comprises" and "comprising" will be understood to be open-ended, meaning of inclusion, i.e. to be interpreted to mean "including, but not limited to.

The following detailed description of various embodiments of the present utility model will be provided in connection with the accompanying drawings to provide a clearer understanding of the objects, features and advantages of the present utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the utility model, but rather are merely illustrative of the true spirit of the utility model.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clarity of presentation of the structure and manner of operation of the present utility model, the description will be made with the aid of directional terms, but such terms as "forward," "rearward," "left," "right," "outward," "inner," "outward," "inward," "upper," "lower," etc. are to be construed as convenience, and are not to be limiting.

The present utility model relates to a lens driving mechanism 100, a base 2 and a processing method of the base 2, wherein a metal strip 22 is arranged in the base 2, and the precise electrical connection between a chip 23 and the metal strip 22 is ensured by two injection molding, and the lens driving mechanism 100 and the base 2 according to an embodiment of the present utility model are described in detail below with reference to the accompanying drawings.

Fig. 1 is an exploded view of a lens driving mechanism 100 according to an embodiment of the present utility model. Fig. 2 is an assembly view of the lens driving mechanism 100 of the embodiment shown in fig. 1. As shown in fig. 1 and 2, the lens driving mechanism 100 comprises a base 2, a circuit board 93 stacked on the top surface of the base 2, a housing 1, a frame 4, a carrier 5, four suspension wires 8, an upper reed 6 and a lower reed 7, wherein the base 2 comprises a plastic plate 21 and a plurality of metal strips 22 embedded in the plastic plate 21. The plate body 21 is a rectangular plate with a central hole, and a plurality of metal strips 22 are arranged at intervals, namely, each metal strip 22 is not intersected with other metal strips 22. The plurality of metal strips 22 are arranged in a rectangular structure and embedded inside the plate body, and it should be understood that the plurality of metal strips 22 may be any shape or arranged in any other manner, and the specific arrangement of the plurality of metal strips 22 is not limited herein.

Each metal strip 22 has two connection ends, and as shown in fig. 7 and 8, the connection ends of part of the metal strips 22 are exposed to the bottom of the plastic plate 21 for connection to an external power source. In addition, the connection ends of four metal strips 22 among the plurality of metal strips 22 are exposed to four corners of the plate body 21 for electrically connecting the four suspension wires 8. The connection ends of part of the metal strips 22 of the plurality of metal strips 22 are gathered at the position where the chip 23 is mounted, the part connection ends are chip connection ends 221, and the position where the chip is mounted is a chip mounting position for connecting the chip 23.

The plurality of chip connection terminals 221 are gathered at intervals at the chip mounting position, the outside of the chip mounting position is covered with a protective shell 222, the protective shell 222 is arranged around the chip mounting position, the bottom is provided with a mounting groove for mounting the chip 23, and the plurality of chip connection terminals 221 are exposed in the mounting groove and are used for being electrically connected with the chip 23. In the embodiment shown in fig. 6, 7 and 8, two chip mounting positions are respectively located at two adjacent sides of the board 21, two protective cases 222 are wrapped outside the two chip mounting positions, and two chips 23 are respectively located in the two mounting grooves and electrically connected with the plurality of chip connection ends 221 in the two mounting grooves. It should be appreciated that the mounting slot of each protective shell 222 may mount a single chip 23 or multiple chips 23, and that the shape of each protective shell 222 need to be capable of encasing a single chip 23 or multiple chips 23, without limiting the specific shape or number of protective shells 222.

When the base 2 is processed, the small-sized die is utilized to perform injection molding on the chip mounting position in advance to form the protective shell 222, the protective shell 222 is smaller, and the injection molding precision of the protective shell 222 can be ensured. In the injection molding process of the protective shell 222, a plurality of clamps can be used for pressing a plurality of chip connecting ends 221 so as to ensure that the chip connecting ends 221 cannot be found to be misplaced or moved in the injection molding process, ensure that the chip connecting ends 221 are at preset positions and improve the accurate positioning connection between the chip 23 and the chip connecting ends 221.

The circuit board 93 is stacked on the top surface of the base 2, and has a plurality of first coils disposed therein, and the plurality of first coils are electrically connected to a portion of the metal strips 22 inside the base 2, and the portion of the metal strips 22 can energize the plurality of first coils.

The bottom opening of the shell 1 can be sleeved on the periphery of the base 2, namely, the base 2 covers the bottom opening of the shell 1 and is matched with the shell 1 to form an accommodating space which can accommodate the frame 4, the carrier 5 and the lens of the carrier 5. Specifically, the frame 4 is a rectangular frame, the frame 4 is suspended above the base 2, and four magnet sets 41 are disposed inside the frame. The four magnet groups 41 are respectively embedded into four rims of the frame 4, and the four magnet groups 41 can drive the frame 4 to move along the direction perpendicular to the optical axis in cooperation with the first group of coils so as to prevent lens shake.

The carrier 5 is annular, and a lens can be mounted in the annular. The carrier 5 is movably mounted in the frame 4 as shown in fig. 3 and 4, i.e. the carrier 5 is movable in the direction of the optical axis relative to the frame 4. The four corners of the outer periphery of the carrier 5 are respectively provided with a first damping gel 51. The first damping gel 51 is clamped between the outer periphery of the carrier 5 and the inner periphery of the frame 4, preventing the carrier 5 from colliding with the frame 4 during movement. The carrier 5 is wound with a second set of coils, and the second set of coils are matched with the magnets of the frame 4 to drive the carrier 5 to move along the optical axis direction so as to adjust the focal length of the lens.

The upper reed 6 and the lower reed 7 have elasticity, and as shown in fig. 2 and 5, the upper reed 6 is used for being connected with the top of the carrier 5 and the top of the frame 4, the lower reed 7 is used for being connected with the bottom of the carrier 5 and the bottom of the frame 4, and the carrier 5 and the frame 4 can be elastically connected by matching the upper reed 6 and the lower reed 7 so as to drive the carrier 5 to reset.

The upper reed 6 is also electrically conductive and has a substantially rectangular outer periphery, and the upper reed 6 is electrically connected to the second set of coils on the carrier 5. Four corners of the upper reed 6 are respectively and electrically connected with the top ends of the four suspension wires 8, and the frame 4 is suspended above the base 2 through the four suspension wires 8.

The four suspension wires 8 can conduct electricity, the bottom ends of the four suspension wires extend to the four corners of the base 2 respectively, and the four suspension wires are electrically connected with the connecting ends of the plurality of metal strips 22, namely, the metal strips 22 can energize the second group of coils through the suspension wires 8 and the upper reed 6. The top surface of the base 2 is further provided with four second damping adhesives 25, as shown in fig. 6, the four second damping adhesives 25 are respectively close to the bottom ends of the four suspension wires 8 and are respectively located at the radial inner sides of the four suspension wires 8, and the four second damping adhesives 25 can prevent the frame 4 from colliding with the base 2 in the moving process.

In the preferred embodiment of fig. 5 and 6, the mounting slot is open toward the bottom of the protective case 222, and the chip 23 is mounted into the mounting slot from the bottom of the protective case 222. The top of the protective housing 222 is provided with a plurality of ventilation holes 223, the ventilation holes 223 are communicated with the mounting groove, and the shape of the ventilation holes 223 is the same as the shape of the corresponding chip connecting ends 221. When the protective housing 222 is moulded plastics, firstly place a plurality of chip link 221 on the mould, use a plurality of anchor clamps to fix a position respectively and press a plurality of chip link 221, the radial cross-sectional shape of a plurality of anchor clamps is the same with the shape of chip link 221 basically, a plurality of anchor clamps are along the route of a plurality of chip link 221 to press a plurality of chip link 221, mould plastics the chip installation position again, can guarantee the stability of chip link 221 in the in-process of moulding plastics, prevent that chip link 221 from taking place dislocation or removal's phenomenon, thereby guarantee that a plurality of chip link 221 are in the preset position, the convenience is connected with chip 23 electricity. After the protective shell 222 is injection molded, the plurality of clamps are taken out from the protective shell 222 to form a plurality of ventilation holes.

It should be appreciated that in other embodiments, the mounting groove may also be open toward the top of the protective shell 222, and the plurality of ventilation holes 223 are located at the bottom of the protective shell 222, without limiting the opening direction of the mounting groove. The shape of the plurality of ventilation holes 223 may be slightly different from the shape of the chip connection terminal 221, so long as the chip connection terminal 221 is located at a predetermined position after the protective case 222 is molded.

In the embodiment shown in fig. 7, the protecting shell 222 is a rectangular shell, and the top surface of the protecting shell 222 does not exceed the top surface of the board 21, and preferably, the top surface of the protecting shell 222 is flush with the top surface of the board 21, so as to ensure the surface flatness of the top surface of the base 2.

In addition, in the embodiment of fig. 7 and 8, two sensors 24 are further provided in the two mounting grooves, respectively, and the connection ends of part of the metal sheets in the mounting grooves are used for electrically connecting with the sensors 24, or the two sensors 24 are electrically connected with the chip connection ends 221 in the mounting grooves, respectively, and the two sensors 24 are used for sensing displacement of the frame 4 moving in the direction perpendicular to the optical axis.

The utility model also relates to a processing method of the base 2, and the processing method of the base 2 comprises the following steps:

s1, providing a plurality of metal strips 22, and forming chip mounting positions after chip connecting ends 221 of part of the metal strips 22 are gathered, so that the chip connecting ends 221 are arranged at intervals;

s2, placing the chip connecting ends 221 of the plurality of metal strips 22 in a first die, respectively pressing the plurality of chip connecting ends 221 of the chip mounting position by using a plurality of clamps, performing primary injection molding on the chip mounting position to form a protective shell 222, and forming a mounting groove on the top surface or the bottom surface of the protective shell 222;

and S3, placing the semi-finished product formed in the step S2 in a second die, and performing secondary injection molding on the metal strip 22 outside the protective shell 222 to form the plate body 21 of the base 2.

In practice, after the injection molding of the base 2, the chip 23 may be mounted to the mounting groove by soldering and electrically connected to the chip connection terminals 221 in the mounting groove. Or after the semi-finished product is completed in step S2, the chip 23 is mounted in the mounting groove and the chip connection terminals 221 are electrically connected, and step S3 is performed, without limiting the step of mounting the chip 23 to the mounting groove.

The base 2 of the present utility model is formed by two injection molding, the first injection molding forming the protective shell 222 and the second injection molding forming the plate body. In the first injection molding process, the clamp is used for pressing the chip connecting end 221, so that the chip connecting end 221 is prevented from moving or dislocating in the injection molding process, the chip connecting end 221 is ensured to be at a preset position, and the accuracy of electric connection with the chip 23 is improved.

While the preferred embodiments of the present utility model have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the utility model and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims (8)

1. A base, characterized in that the base comprises:

the plate body is annular, a protective shell is embedded in the plate body, one surface of the bottom surface or the top surface of the protective shell is provided with a mounting groove, and the other surface of the protective shell is provided with a plurality of air holes communicated with the mounting groove;

the metal strips are positioned in the plate body, and the connecting ends of part of the metal strips are exposed in the mounting grooves and are arranged corresponding to the air holes; and

and the chip is positioned in the mounting groove and is electrically connected with the metal strip positioned in the mounting groove.

2. The base of claim 1, wherein the mounting groove is located on a bottom surface of the protective housing and the ventilation holes are located on a top surface of the protective housing.

3. The base of claim 1, wherein the plurality of ventilation holes have the same shape as the plurality of connection terminals, respectively.

4. The base of claim 1, wherein the top surface of the protective shell is flush with the top surface of the plate.

5. The base of claim 1, wherein the plate body is rectangular, two protecting shells are located on two adjacent sides of the plate body, and two chips are respectively installed in the installation grooves of the two protecting shells.

6. The base of claim 5, further comprising two sensors positioned in the two mounting slots and electrically connected to a portion of the connection terminals, respectively.

7. The base of claim 5, wherein ends of four of the plurality of metal strips are exposed at a top surface of the plate body and are located at four corners, respectively.

8. A lens driving mechanism, characterized by comprising:

the base of any one of claim 1 to 7,

a housing connected to an outer circumference of the base and forming an accommodating space;

the circuit board covers the top surface of the base and is internally provided with a first group of coils, and the first group of coils are electrically connected with the metal strip;

the frame is positioned in the annular accommodating space, the frame is provided with a magnet group, and the magnet group is matched with the first group of coils to drive the frame to move along the direction perpendicular to the optical axis;

the carrier is used for mounting the lens, is provided with a second group of coils and can be movably mounted in the frame, and the second group of coils can drive the carrier to move along the optical axis direction by matching with the magnet group;

the bottom ends of the suspension wires are electrically connected with the metal strips, and the top ends of the suspension wires are electrically connected with the second group of coils;

the upper reed and the lower reed are respectively elastic, two ends of the upper reed are respectively connected with the carrier and the top of the frame, two ends of the lower reed are respectively connected with the carrier and the bottom of the frame, and the upper reed and the lower reed are matched to enable the carrier to be elastically connected with the frame.

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