CN218678791U - Position control assembly and voice coil motor - Google Patents

Abstract

The application discloses a position control assembly and a voice coil motor, which comprise the position control assembly and a base, wherein a conductive frame is connected to the base, and a lower elastic sheet is assembled on the base; the lower elastic sheet is connected with the carrier, and the coil wound on the carrier is connected with the lower elastic sheet; at least two magnets are arranged in the base and on one side of the coil, and the upper shell and the base are enclosed to form an accommodating space; this application carries out the integrated design through will moving the pole piece and shell fragment down, has solved prior art and has connected comparatively difficult and even the two problem that also very easily takes place to separate of electrode plate, light sensing element.

Description

Position control assembly and voice coil motor

Technical Field

The utility model relates to a product technical field makes a video recording, concretely relates to position control subassembly and voice coil motor.

Background

At present, most cameras of electronic equipment have an optical anti-shake function, and in an application process, an optical path during shaking is mainly compensated by using movement of a lens or movement of a photosensitive element, so that imaging quality of the camera during photographing is guaranteed. Along with the increasing of the size of the lens, the increasing of the weight, the difficulty of moving the lens is increasing, and the photosensitive element is receiving more and more attention due to the small size and light weight. In some camera modules which use a movable photosensitive element to realize optical anti-shake, in order to achieve faster and more stable focusing, a hall sensor or a driving chip with a hall sensor detection function is usually arranged in the camera, and a corresponding magnet for detection is arranged in the camera to detect the moving position of the photosensitive element, so that closed-loop control is realized when the photosensitive element is driven to move, and the aim of stably and quickly controlling the camera module to focus is achieved. However, the internal space of the camera module is occupied, the miniaturization of the camera module is not facilitated, the cost of the Hall device is high, and the reduction of the cost of the camera module is not facilitated.

Therefore, according to the camera module and the electronic device (application publication number: CN 113572938A) disclosed in the patent library, the problem that the space in the camera module is insufficient can be effectively solved, the second electrode plate of each group of electrode plates can move along with the movement of the photosensitive element, so that the size of a capacitor formed by the relative arrangement of the first electrode plate and the second electrode plate in each group of electrode plates can be changed, the position detection of two different directions of a moving plane where the photosensitive element is located can be realized by the arrangement of at least two groups of electrode plates, the movement of the photosensitive element can be controlled by the arrangement of the driving assembly according to the size of the capacitor, namely, the driving assembly can control the driving process through the detected size of the capacitor while driving the photosensitive element to move, and therefore, the closed-loop control is realized when the photosensitive element is driven to move.

However, the prior art (CN 113572938A) disclosed above still has the following problems: because the volumes of the photosensitive element and the electrode plates (the first electrode plate and the second electrode plate are equivalent to the fixed pole piece and the movable pole piece in the application) are tiny and are independent spare and accessory parts, the photosensitive element and the electrode plates are difficult to connect together; secondly, in practical applications, the connection between the photosensitive element and the electrode plate is usually performed by dispensing or hot riveting, but the photosensitive element and the electrode plate are easily separated even if they are connected together because of few contact surfaces.

Disclosure of Invention

In view of this, the utility model aims at providing a position control subassembly and voice coil motor, this application has solved the problem that plate electrode, photosensitive element are connected comparatively difficultly and even the two is connected and also very easily takes place the separation through carrying out the integrated design with movable pole piece and lower shell fragment.

In a first aspect, the utility model discloses a position control assembly, which comprises a lower elastic sheet, a conductive frame and a chip, wherein one end of the lower elastic sheet is electrically connected with the chip; the chip is electrically connected with a conductive frame, the conductive frame is connected with a fixed pole piece, and the chip is electrically connected with a capacitor cathode terminal and a capacitor anode terminal; the other end of the lower elastic sheet and the fixed pole piece form an overlapping area, and the lower elastic sheet overlapped on the fixed pole piece is used as a movable pole piece.

As the further optimization to the shell fragment, the shell fragment divides into two down, two branch electricity connect on the corresponding access contact end of chip, wherein the free end of shell fragment extends to the week side of chip under one branch, and the free end of shell fragment extends to the far away of chip under the other branch, and the body middle part of shell fragment is snakelike arranging under two branches.

In a second aspect, the utility model discloses a voice coil motor, which comprises a position control assembly and a base, wherein a conductive frame is connected with the base, and a lower elastic sheet is assembled on the base; the lower elastic sheet is connected with the carrier, and the coil wound on the carrier is connected with the lower elastic sheet; at least two magnets are arranged in the base and on one side of the coil, and the upper shell and the base are enclosed to form an accommodating space.

As a further limitation to the connection relation between the conductive frame and the base, the conductive frame is embedded in the base, penetrates through the corresponding upper surface of the base, and the fixed pole piece extends to the upper side of the base.

As a further optimization of the base, the four corner positions of the base are respectively provided with an upwards extending blocking and leaning part.

As a further optimization of the application, an upper elastic sheet is arranged above the carrier and connected with the carrier.

As a further optimization of the present application, two branch spring pieces are additionally arranged on two sides of the original two branch lower spring pieces, and the two branch spring pieces and the two branch lower spring pieces jointly form an annular frame body.

As another embodiment of the lower spring, the two branch springs are electrically connected to the corresponding access contacts on the chip, and the two corresponding output contacts of the chip are electrically connected to the positive terminal and the negative terminal, respectively.

The beneficial effects of the utility model reside in that following several:

first, the present application differs from the prior art in that: the movable pole piece is integrally formed at the tail end of the lower elastic piece, and the separate and additional movable pole piece is not needed, so that the lower elastic piece has the functions of buffering, conducting and acting as the movable pole piece, and compared with the prior art, the movable pole piece has stronger function; secondly, the defects that the movable pole piece and the photosensitive element are difficult to directly connect and are easy to loosen after the movable pole piece and the photosensitive element are connected in the traditional technology are overcome, and the material cost and the installation space in the voice coil motor can be saved.

Drawings

Fig. 1 is a schematic view of an assembly structure of a lower spring and a chip.

Fig. 2 is a schematic view of a connection structure of a conductive frame and a chip.

Fig. 3 is a schematic view of a connection structure of the chip, the conductive frame, the fixed pole piece, the lower elastic piece and each terminal.

Fig. 4 is a schematic perspective view of the position control assembly assembled on the base.

Fig. 5 is a schematic view of an assembly structure of the carrier and the coil.

Fig. 6 shows that the connecting portion between the lower spring and the coil is of a half-open window structure.

FIG. 7 is an assembly view showing the upper case and the magnet.

Fig. 8 is an assembly structure diagram of the upper spring plate.

Fig. 9 is a schematic perspective view of the spring with two branches.

FIG. 10 is a perspective view of two separate spring leaves.

In the figure, a lower spring sheet 1, a branch lower spring sheet 101, a branch spring sheet 102, a conductive frame 2, a chip 3, a fixed pole piece 4, a capacitor cathode terminal 5, a capacitor anode terminal 6, a base 7, a rivet 8, an assembly hole 9, a carrier 10, a coil 11, a magnet 12, an upper shell 13, a blocking part 14, an upper spring sheet 15, a positive terminal 16 and a negative terminal 17.

Detailed description of the preferred embodiments

For clear understanding of the technical solution of the present application, a position control assembly and a voice coil motor provided in the present application will be described in detail below with reference to specific embodiments and accompanying drawings.

The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of this application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, such as "one or more", unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" means one, two or more.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically stated.

Example 1

The embodiment provides a position control assembly, and firstly, referring to fig. 1, an assembly structure schematic diagram of a lower elastic sheet 1 and a chip 3 is shown, and as can be seen from the diagram, the position control assembly comprises the lower elastic sheet 1, a conductive frame 2 and the chip 3, wherein the lower elastic sheet 1 is divided into two branches, the two branches are both connected to corresponding access contact ends of the chip 3 in a dispensing and hot riveting mode (the model of the chip 3 is selected from CHMD 9500), the free end of the lower elastic sheet 101 of one branch extends to the peripheral side of the chip 3, the free end of the lower elastic sheet 101 of the other branch extends to the far away side of the chip 3, and the middles of the elastic bodies of the two branch lower elastic sheets 101 are distributed in a serpentine shape. Then, referring to fig. 2, a schematic diagram of a connection structure of the conductive frame 2 and the chip 3 is shown, as shown in the drawing, the conductive frame 2 is connected to the access contact end corresponding to the chip 3, the conductive frame 2 is in a half-ring shape as a whole, two fixed pole pieces 4 are welded to a frame body of the conductive frame 2 through solder paste, and the two fixed pole pieces 4 are distributed above the conductive frame 2 at intervals. Referring to fig. 3, a schematic diagram of a connection structure of the chip 3, the conductive frame 2, the fixed pole piece 4, the lower spring plate 1 and the terminals is shown, and it can be seen from the diagram that a capacitor cathode terminal 5 and a capacitor anode terminal 6 are soldered on two corresponding output contact ends of the chip 3, where the two terminals are made of copper white.

In this embodiment, BF158 is selected for use as the material of the lower elastic sheet 1, as can be seen from fig. 3, the straight portion of the other end of the lower elastic sheet 1 is disposed above the corresponding fixed pole piece 4, the straight portion of the lower elastic sheet 1 and the upper portion of the fixed pole piece 4 form an overlapping area, the straight portion of the lower elastic sheet 1 overlapped on the fixed pole piece 4 directly serves as a moving pole piece, and the chip 3 controls the carrier 10 to move in the focusing direction according to the capacitance signal formed between the corresponding moving pole piece and the fixed pole piece 4 (the carrier 10 will be introduced later, and the end edge of the lower elastic sheet 1 will be connected to the coil 11 on the carrier 10). When the lower elastic sheet 1 moves, the corresponding movable pole piece is driven to move, and the vertical distance (L) between the movable pole piece and the corresponding fixed pole piece 4 changes, so that the capacitance changes, the moving position of the carrier 10 can be detected, and focusing is realized to ensure the definition of a shot image. The difference of this application and prior art lies in: the movable pole piece is integrally formed at the tail end of the lower elastic sheet 1, and no separate movable pole piece is needed to be arranged, so that the lower elastic sheet 1 has the functions of buffering, conducting and acting as the movable pole piece, and compared with the prior art, the movable pole piece has stronger function; secondly, the defects that the movable pole piece and the photosensitive element are difficult to directly connect and are easy to loosen after the movable pole piece and the photosensitive element are connected in the traditional technology are overcome, and the material cost and the installation space in the voice coil motor can be saved.

Example 2

The embodiment provides a voice coil motor, which includes the position control assembly in embodiment 1, and further includes a base 7, as shown in fig. 4, which shows a schematic three-dimensional structure of the position control assembly assembled on the base 7, as can be seen from the figure, the conductive frame 2 is embedded in the base 7, two branches on the conductive frame 2 penetrate through the corresponding upper surface of the base 7, and the fixed pole piece 4 soldered on the branches extends to the upper side of the base 7, and the manner that the conductive frame 2 and the fixed pole piece 4 are embedded in the base 7 further saves the internal space of the base 7, so that the installation space of other parts is enlarged; two sets of rivets 8 are formed on two corners of the base 7, each set of rivets 8 is divided into two, two sets of assembly holes 9 are formed in two branches of the lower elastic sheet 1 respectively, the assembly holes 9 correspond to the rivets 8 one to connect the assembly holes 9 and the rivets 8 into a whole in a hot riveting and dispensing mode, and the positioning of the lower elastic sheet 1 is facilitated.

Referring to fig. 5, an assembly structure of the carrier 10 and the coil 11 is schematically shown, and as can be seen from the figure, the carrier 10 is disposed above the lower spring 1, the coil 11 is wound on the circumferential surface of the carrier 10, and the coil 11 is connected to the lower spring 1; when the coil 11 is connected with the lower elastic sheet 1, the embodiment is connected in a solder paste welding manner, and meanwhile, as shown in fig. 6, the connecting portion between the lower elastic sheet 1 and the coil 11 is of a half-open window type structure, so that the solder paste is prevented from climbing to the inner side of the carrier 10 by utilizing the design of the half-open window type structure, and further the solder paste is prevented from damaging components such as a lens.

Referring to fig. 7, an assembly and display diagram of the upper housing 13 and the magnets 12 is shown, and it can be seen that four magnets 12 are arranged around the base 7 at equal intervals; the upper shell 13 covers the base 7 and forms an accommodating space with the base 7 for arranging the carrier 10, the magnet 12 and other components. The coil 11 wound on the carrier 10 generates an electromagnetic thrust under the action of a magnetic field formed by the magnet 12, so as to push the carrier 10 to move, thereby focusing a lens mounted on the carrier 10 (the lens is a conventional technical means in the prior art, and is not an object protected by the present application, and is not described herein again).

Further, in order to ensure the dislocation of the upper housing 13 and the base 7 during the docking process, referring to fig. 4 or 5, a stop portion 14 extending upward is provided at each of four corners of the base 7.

Further, in order to prevent the carrier 10 from colliding with the base 7 or the upper case 13 during the movement, a certain buffering force is required to be provided between the carrier 10 and the base 7 and the upper case 13; as shown in fig. 8, which shows an assembly structure schematic diagram of the upper elastic sheet 15, the upper elastic sheet 15 is disposed above the carrier 10, the upper elastic sheet 15 and the carrier 10 are connected by means of hot riveting and dispensing, and the other end of the upper elastic sheet 15 is connected with the upper housing 13. As shown in fig. 9 and 10, fig. 9 is a schematic perspective view of a three-dimensional structure with two separate spring leaves 102, fig. 10 is a schematic perspective view of a three-dimensional structure with two separate spring leaves 102, and as can be seen from the two figures, the two separate spring leaves 102 are respectively arranged on two sides of the original two-branch lower spring plate 101, the two separate spring leaves 102 and the two separate lower spring plates 101 together form an annular frame, and the integrally formed annular frame serves as a buffer for the carrier 10; on the other hand, the two branch springs 102 can be used not only as a buffer but also as a lead wire connected to the coil 11, as shown in fig. 10, the two branch springs 102 are electrically connected to corresponding input contacts on the chip 3, and the corresponding two output contacts on the chip 3 are electrically connected to the positive terminal 16 and the negative terminal 17, respectively. This application is through collecting buffer function and conductive function jointly under on shell fragment 1, save the loaded down with trivial details of establishing the wire in addition, reduce simultaneously to base 7, the occupation of last casing 13 accommodation space.

Claims (8)

1. A position control assembly, characterized by: the conductive frame comprises a lower elastic sheet (1), a conductive frame (2) and a chip (3), wherein one end of the lower elastic sheet (1) is electrically connected with the chip (3); the chip (3) is electrically connected with a conductive frame (2), the conductive frame (2) is connected with a fixed pole piece (4), and the chip (3) is electrically connected with a capacitor cathode terminal (5) and a capacitor anode terminal (6); the other end of the lower elastic sheet (1) and the fixed pole piece (4) form an overlapping area, and the lower elastic sheet (1) overlapped on the fixed pole piece (4) is used as a movable pole piece.

2. The position control assembly of claim 1, wherein: the lower elastic sheet (1) is divided into two branches, the two branches are electrically connected to the corresponding access contact ends of the chip (3), the free end of one branch lower elastic sheet (101) extends to the peripheral side of the chip (3), the free end of the other branch lower elastic sheet (101) extends to the far away of the chip (3), and the middle parts of the elastic bodies of the two branch lower elastic sheets (101) are arranged in a snake shape.

3. A voice coil motor, comprising: the position control assembly comprises the position control assembly as claimed in any one of claims 1 to 2, and further comprises a base (7), the conductive frame (2) is connected to the base (7), and the lower elastic sheet (1) is assembled on the base (7); the lower elastic sheet (1) is connected with the carrier (10), and a coil (11) wound on the carrier (10) is connected with the lower elastic sheet (1); at least two magnets (12) are arranged in the base (7) and on one side of the coil (11), and the upper shell (13) and the base (7) are enclosed to form an accommodating space.

4. A voice coil motor as claimed in claim 3, wherein: the conductive frame (2) is embedded in the base (7), the conductive frame (2) penetrates through the corresponding upper surface of the base (7), and the fixed pole piece (4) extends to the position above the base (7).

5. A voice coil motor as claimed in claim 3, wherein: four corners of the base (7) are provided with a stop part (14) extending upwards.

6. A voice coil motor as claimed in claim 3, wherein: an upper elastic sheet (15) is arranged above the carrier (10), and the upper elastic sheet (15) is connected with the carrier (10).

7. A voice coil motor as claimed in claim 3, wherein: two branch spring plates (102) are arranged on two sides of the original two branch lower spring plates (101), and the two branch spring plates (102) and the two branch lower spring plates (101) form an annular frame together.

8. The voice coil motor of claim 7, wherein: the two branch reeds (102) are electrically connected with corresponding access contact ends on the chip (3), and the two corresponding output contact ends of the chip (3) are respectively electrically connected with a positive terminal (16) and a negative terminal (17).

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