CN204886643U - Camera module and its voice coil motor - Google Patents

Abstract

The utility model relates to a voice coil motor, it includes base, lower shell fragment, two conductive terminal, carrier, coil, goes up shell fragment shell and a plurality of magnet. The structure is characterized in that two conductive terminals are arranged, one end of the coil is electrically connected with one conductive terminal, the other end of the coil is electrically connected with the other conductive terminal, the mode that a lower elastic sheet is directly welded with two ends of the coil in the traditional technology is changed, the two conductive terminals are arranged on the upper surface of the base at intervals and extend out of the lower surface of the base, two ends of the coil are led to the lower surface of the base through the conductive terminals, namely the outer part of the voice coil motor, two ends of the coil are respectively electrically connected with the circuit board through the two conductive terminals, and the. Simultaneously, a camera module of the voice coil motor is provided.

Description

Camera module and its voice coil motor

technical field

The utility model relates to the technical field of cameras, in particular to a camera module and a voice coil motor thereof.

Background technique

Voice coil motor (VCM, VoiceCoilMotor), is a kind of motor. Because the principle is similar to that of a speaker, it is called a voice coil motor, which has the characteristics of high frequency response and high precision. The main principle is to control the magnitude of the ampere force on the coil by changing the DC current of the inner coil of the motor in a permanent magnetic field, thereby driving the lens module to move up and down. Mobile phone cameras widely use VCM to realize the auto-focus function, through which the position of the lens can be adjusted to present a clear image.

The current transmission method of the traditional voice coil motor is that the two ends of the coil are directly welded to the two relatively independent parts of the lower shrapnel, and the lower shrapnel is then electrically connected to the circuit board, and the circuit board supplies power to the coil. However, since the two ends of the coil are directly welded to the two parts of the lower shrapnel, it is easy to cause a short circuit.

Utility model content

Based on this, it is necessary to provide a camera module and a voice coil motor thereof that can effectively prevent short circuit in order to address the above technical problems.

A voice coil motor, comprising:

The base is provided with a first light hole;

The lower elastic piece is arranged on the upper surface of the base, and the second light hole is opened on the lower elastic piece;

Two conductive terminals are arranged at intervals on the upper surface of the base and protrude from the lower surface of the base, and the two conductive terminals are respectively used for electrical connection with an external circuit board;

a carrier, arranged on the base, and a third light hole is opened on the carrier;

a coil wound around the outer periphery of the carrier, one end of the coil is connected to one of the conductive terminals, and the other end of the coil is connected to the other of the conductive terminals;

The upper elastic piece is provided with a fourth light-through hole, and the two ends of the carrier are respectively held on the inner sidewall of the second light-through hole of the lower elastic piece and the inner sidewall of the fourth light-through hole of the upper elastic piece;

The casing includes side walls and a top wall, the casing and the base form a receiving space, and the top wall is provided with a fifth light hole; and

A plurality of magnets are respectively installed on the inner surface of the side wall of the housing, and the plurality of magnets are arranged opposite to the coil, wherein the carrier, the coil, the upper elastic piece, the lower elastic piece and the plurality of magnets are all accommodated in the inside the containment space.

In one embodiment, a positioning column is provided on the upper surface of the base, a first positioning hole is opened on the lower elastic piece, and the lower elastic piece is arranged on the positioning column through the first positioning hole.

In one embodiment, the lower elastic piece is composed of two relatively independent half elastic pieces.

In one embodiment, one end of the two conductive terminals is provided with a fixing plate, and a second positioning hole is opened on the fixing plate, and the conductive terminal is arranged on the positioning column through the second positioning hole.

In one of the embodiments, the lower elastic piece is a square sheet-shaped structure with a second light hole opened in the middle.

In one embodiment, a first step is provided at the intersection of the upper surface and the side surface of the base, and one end of each conductive terminal is provided with a second step matching the first step.

In one embodiment, the upper elastic piece and the lower elastic piece include an outer frame and a linear elastic arm bent into multiple sections extending inward from the outer frame.

In one of the embodiments, a carrying sheet is further provided, and the carrying sheet is clamped on the outer periphery of the carrier and located below the coil.

In one of the embodiments, a washer is further included, and the washer is accommodated in the housing and located above the upper elastic piece.

A camera module, comprising:

circuit board;

a bracket, the bottom of which is arranged on the circuit board, the bracket and the circuit board form a cavity, and the cavity runs through the upper surface of the bracket;

an image sensor is arranged on the circuit board and accommodated in the cavity;

a filter set on the bracket and above the image sensor;

The voice coil motor as described in any one of the above, which is arranged on the support, and the coil is electrically connected to the circuit board through the conductive terminal; and

The lens module is arranged in the voice coil motor, and the voice coil motor is used to drive the lens module to move along its optical axis.

The aforementioned camera module and its voice coil motor have at least the following advantages:

Two conductive terminals are set, one end of the coil is electrically connected to one of the conductive terminals, and the other end is electrically connected to the other conductive terminal, which changes the way in which the lower shrapnel is directly welded to both ends of the coil in the traditional technology, and the two conductive terminals are arranged at intervals On the upper surface of the base and protruding from the lower surface of the base, the two ends of the coil are led to the lower surface of the base through the conductive terminals, that is, the outside of the voice coil motor, and the two ends of the coil are respectively connected to the The circuit board is electrically connected, and such a structure can effectively prevent short circuits.

Description of drawings

FIG. 1 is an exploded schematic diagram of a voice coil motor in an embodiment;

FIG. 2 is an exploded schematic diagram of a voice coil motor in another embodiment.

Detailed ways

In order to make the above purpose, features and advantages of the present utility model more obvious and understandable, the specific implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a full understanding of the present invention. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below .

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model. The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The camera module in one embodiment includes a circuit board, a bracket, an image sensor, a filter, a voice coil motor 100 and a lens module. The circuit board can be a flexible circuit board, a rigid circuit board, or a rigid-flex circuit board. When the circuit board is a flexible circuit board, a reinforcement board may be provided to increase the strength of the flexible circuit board.

The bottom of the bracket is set on the circuit board. The bracket and the circuit board form a cavity, and the cavity penetrates the upper surface of the bracket so that external light can pass through the bracket and enter the cavity. The optical filter is arranged on the bracket and above the image sensor. The image sensor is arranged on the circuit board and accommodated in the cavity. The external light enters the cavity through the penetrating part of the upper surface of the bracket and passes through the optical filter. onto the image sensor. The filter can be an infrared cut filter.

Please refer to FIG. 1 , which is a voice coil motor 100 in an embodiment. The lens module (not shown) is arranged in the voice coil motor 100, and the voice coil motor 100 is arranged on the support for driving the lens module (not shown) to move along its optical axis to achieve the purpose of focusing.

Specifically in this embodiment, the voice coil motor 100 includes a base 110 , a lower elastic piece 120 , two conductive terminals 130 , a carrier 140 , a carrier piece 150 , a coil 160 , an upper elastic piece 170 , a washer 180 , a casing 191 and a plurality of magnets 192 . Specifically, the base 110 is disposed on the support. The base 110 is provided with a first light hole 110a, and the first light hole 110a corresponds to the position of the cavity formed by the bracket and the circuit board. The base 110 is roughly rectangular. The upper surface of the base 110 is provided with positioning posts 111 , the number of the positioning posts 111 may be four, and the four positioning posts 111 are respectively close to the four corners of the base 110 .

The lower elastic piece 120 is disposed on the upper surface of the base 110 . Specifically, the lower elastic piece 120 is provided with a first positioning hole 120a, and the lower elastic piece 120 is positioned on the upper surface of the base 110 through the first positioning hole 120a pierced on the positioning post 111 . A second light through hole 120b is opened on the lower elastic piece 120, and the second light through hole 120b may be a circular through hole. In this embodiment, the lower elastic piece 120 is composed of two relatively independent half elastic pieces, and the two relatively independent half elastic pieces form a square sheet-like structure with a circular through hole. The lower elastic piece 120 includes an outer frame and a linear elastic arm bent into multiple sections extending inward from the outer frame. Multi-segment linear elastic arms are formed at the four corners thereof.

Two conductive terminals 130 are spaced apart on the upper surface of the base 110 and protrude from the lower surface of the base 110 , and the two conductive terminals 130 can be electrically connected to the circuit board respectively. Specifically, the two conductive terminals 130 are respectively disposed at two adjacent corners of the base 110 .

Specifically in this embodiment, one end of the two conductive terminals 130 is provided with a fixing plate 131 , and a second positioning hole 132 is opened on the fixing plate 131 , and the conductive terminal 130 is disposed on the positioning post 111 through the second positioning hole 132 . The other ends of the two conductive terminals 130 are extension ends, the extension ends are perpendicular to the fixing plate 131, and the extension ends extend toward the lower surface of the base 110 and exceed the plane where the lower surface of the base 110 is located, specifically, the extension ends are vertical On the upper and lower surfaces of the base 110 , the two extension ends are electrically connected to the circuit board.

Certainly, please refer to FIG. 2 , in other implementation manners, the lower elastic piece 120 may also be a closed square sheet-like structure with a second light hole 120b opened in its middle. The second light through hole 120b may be a circular through hole. At this time, a first step 112 is provided at the intersection of the upper surface and the side surface of the base 110 , and a second step 231 matching the first step is provided at one end of each conductive terminal 130 . In this embodiment, the conductive terminal 130 is not in contact with the closed lower elastic piece 120 . The lower elastic piece 120 includes an outer frame and a linear elastic arm bent into multiple sections extending inward from the outer frame. Multi-segment linear elastic arms are formed at the four corners thereof.

Please continue to refer to FIG. 1 , the carrier 140 is disposed on the base 110 , and a third light hole (not shown) is opened on the carrier 140 . Specifically, an inner thread may be provided on the inner wall of the third light hole, the lens module may be provided with an outer thread, and the lens module may be arranged on the carrier 140 by screwing the inner thread and the outer thread. Therefore, the lens module can move with the movement of the carrier 140 .

The coil 160 is wound around the outer periphery of the carrier 140 , one end of the coil 160 is electrically connected to one of the conductive terminals 130 , and the other end is electrically connected to the other conductive terminal 130 . Specifically, the coil 160 can be wound by a wire, and has two wire ends that can serve as welding contact points, and the two ends of the coil 160 are respectively welded to the two conductive terminals 130 . The two conductive terminals 130 lead the coil 160 out of the base 110 , so it is beneficial to reduce the phenomenon of short circuit. The two conductive terminals 130 are electrically connected to the circuit board, and the circuit board supplies power to the coil 160 through the conductive terminals 130 .

The outer periphery of the carrier 140 also holds the carrying sheet 150 , and the carrying sheet 150 is located below the coil 160 for carrying the coil 160 and preventing the coil 160 from falling down.

The upper elastic piece 170 defines a fourth light through hole 170a, and the two ends of the carrier 140 are held on the inner sidewall of the second light through hole 120b of the lower elastic piece 120 and the inner sidewall of the fourth light through hole 170a of the upper elastic piece 170 respectively. The carrier 140 can move up and down under the drive of the ampere force. At this time, the upper elastic piece 170 and the lower elastic piece 120 are stretched by the force. After the ampere force disappears, the upper elastic piece 170 and the lower elastic piece 120 restore the carrier 140 to the original position. Specifically, the upper elastic piece 170 is a square thin sheet structure, the fourth light through hole 170a is opened in the middle of the upper elastic piece 170, and the fourth light through hole 170a may be a circular through hole. The upper elastic piece 170 includes an outer frame and a multi-segmented linear elastic arm extending inwardly from the outer frame. When the carrier 140 moves, the elastic arms of the upper elastic piece 170 and the lower elastic piece 120 are stretched. After the ampere force disappears, the upper elastic piece 170 and the elastic arm of the lower elastic piece 120 restore the carrier 140 to its original position.

The housing 191 is a hollow lower open structure, and the housing 191 and the base 110 form a receiving space. The casing 191 includes a side wall and a top wall. A fifth light hole 191 a is defined on the top wall of the casing 191 . The fifth light hole 191 a may be a circular hole. The casing 191 is made of metal and is roughly in the shape of a rectangular box. The first light through hole 110a, the second light through hole 120b, the third light through hole, the fourth light through hole 170a and the fifth light through hole 191a may be arranged coaxially.

A plurality of magnets 192 are installed on the inner surface of the side wall of the casing 191 respectively, and are respectively arranged opposite to the coil 160 . Specifically, four magnets 192 are included, and the four magnets 192 are respectively arranged at four corners of the casing 191 . The carrier 140 , the coil 160 , the upper elastic piece 170 , the lower elastic piece 120 , the carrier piece 150 , the washer 180 and the plurality of magnets 192 are all accommodated in the accommodation space.

The washer 180 is accommodated in the casing 191 and is located above the upper elastic piece 170 , so the upper elastic piece 170 does not directly contact the top surface of the casing 191 . The gasket 180 can increase the buffer force between the upper elastic piece 170 and the casing 191 . The gasket 180 may be made of synthetic resin material.

The aforementioned camera module and its voice coil motor 100 have at least the following advantages:

Two conductive terminals 130 are provided, one end of the coil 160 is directly electrically connected to one of the conductive terminals 130, and the other end is electrically connected to the other conductive terminal 130, which changes the traditional technology in which the coil 60 is electrically connected to the conductive terminal 130 through the lower elastic piece 120 Two conductive terminals 130 are arranged at intervals on the upper surface of the base 110 and protrude from the lower surface of the base 110, and the two ends of the coil 160 are led to the lower surface of the base 110 through the conductive terminals 130, that is, the voice coil Outside the motor 100 , both ends of the coil 160 are electrically connected to the circuit board through two conductive terminals 130 , such a structure can effectively prevent short circuit.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be understood as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (10)

1. a voice coil motor, is characterized in that, comprising:

Pedestal, offers the first light hole;

Lower shell fragment, is arranged at the upper surface of described pedestal, and described lower shell fragment offers the second light hole;

Two conducting terminals, be arranged at intervals at the upper surface of described pedestal and stretch out in the lower surface of described pedestal, two described conducting terminals are respectively used to be electrically connected with the circuit board of outside;

Carrier, is arranged on described pedestal, described carrier offers the 3rd light hole;

Coil, is set around the outer peripheral edges of described carrier, and one end of described coil is connected to wherein conducting terminal described in, and the other end of described coil is connected to wherein conducting terminal described in another;

Upper shell fragment, offers the 4th light hole, and the two ends of described carrier are fastened on the madial wall of the madial wall of the second light hole of described lower shell fragment and the 4th light hole of described upper shell fragment respectively;

Shell, comprises sidewall and roof, and described shell and described pedestal form a receiving space, and described roof offers five-way unthreaded hole; And

Multiple magnet, is arranged on the inner surface of the sidewall of described shell respectively, and multiple described magnet and described coil are oppositely arranged, and wherein said carrier, coil, upper shell fragment, lower shell fragment and multiple magnet are all contained in described receiving space.

2. voice coil motor according to claim 1, is characterized in that, the upper surface of described pedestal is provided with reference column, and described lower shell fragment offers the first location hole, and described lower shell fragment is arranged on described reference column by described first location hole.

3. voice coil motor according to claim 2, is characterized in that, described lower shell fragment is made up of two relatively independent half shell fragments.

4. voice coil motor according to claim 3, is characterized in that, one end of two described conducting terminals is provided with fixed head, described fixed head offers the second location hole, and described conducting terminal is arranged on described reference column by the second location hole.

5. voice coil motor according to claim 2, is characterized in that, described lower shell fragment is the closed square sheet shape structure that middle part offers the second light hole.

6. voice coil motor according to claim 5, is characterized in that, the upper surface of described pedestal and the intersection of side surface are provided with first step, and one end of each conducting terminal is provided with the second step matched with described first step.

7. voice coil motor according to claim 1, is characterized in that, the linear elasticity arm being bent into multistage that described upper shell fragment and described lower shell fragment comprise housing and extend internally from housing.

8. voice coil motor according to claim 1, is characterized in that, is also provided with carrying tablet, and described carrying tablet is fastened in the outer peripheral edges of described carrier and is positioned at the below of described coil.

9. voice coil motor according to claim 1, is characterized in that, also comprises packing ring, and described packing ring is contained in described shell, and is positioned at the top of described upper shell fragment.

10. a camera module, is characterized in that, comprising:

Circuit board;

Support, is arranged on described circuit board bottom it, described support and described circuit board form a cavity, and described cavity runs through the upper surface of described support;

Image sensor, is arranged on described circuit board, and is contained in described cavity;

Filter, is arranged on described support, and is positioned at above described image sensor;

Voice coil motor as in one of claimed in any of claims 1 to 9, it is arranged on described support, and described coil is electrically connected with described circuit board by described conducting terminal; And

Camera lens module, is arranged in described voice coil motor, and described voice coil motor moves along its optical axis direction for driving described camera lens module.