WO2010082730A2

WO2010082730A2 - Camera actuator module

Info

Publication number: WO2010082730A2
Application number: PCT/KR2009/007645
Authority: WO
Inventors: 이덕열; 유재창
Original assignee: (주)하이소닉
Priority date: 2009-01-13
Filing date: 2009-12-21
Publication date: 2010-07-22
Also published as: WO2010082730A3; KR100964541B1

Abstract

The present invention relates to a camera actuator module, and more particularly, to a camera actuator module in which a housing with a driving unit for driving a lens holder in the upward and downward direction and a base with an image sensor are coupled together by a screw, and power is supplied to the driving unit through a simple configuration. The camera actuator module of the present invention comprises: the lens holder provided with a lens; the housing which covers the lens holder, and which has a threaded first coupling portion; the driving unit arranged in the lens holder or the housing to drive the lens holder in an optical axis direction; a base which is disposed beneath the housing, and which has a second coupling portion fastened to the first coupling portion of the housing by means of a screw, and the interior of which has an image sensor; and a terminal unit for supplying power to the driving unit. The terminal unit includes a first positive terminal and a first negative terminal arranged on the bottom of the housing and connected to the driving unit, and a second positive terminal and a second negative terminal mounted on the top of the base to contact the first positive terminal and the first negative terminal, respectively, to supply power.

Description

Camera actuator module

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera actuator module, and more particularly, a power source applied to a driving unit in a camera actuator module in which a housing having a driving unit for driving a lens holder in a vertical direction and a base having an image sensor are fastened by a screw method. It relates to a camera actuator module that can be applied through a simpler structure.

In general, a camera is provided with a plurality of lenses and a machine capable of photographing a subject through a lens. In general, a camera adjusts a focus by adjusting a relative distance between a plurality of lenses.

In particular, recently, camera modules have been installed in mobile communication devices such as mobile phones and PDAs to capture still images. In order to satisfy the miniaturization, light weight, and multifunctionality required by such mobile communication devices, induction of permanent magnets and coils is required. Auto focusing devices for cameras that use magnetic forces to focus precisely are being developed.

Such a camera module generally includes a lens holder with a built-in lens, an image sensor for converting an optical signal of an object into an electrical signal, a printed circuit board for connecting an image signal output from the image sensor to the outside, and an AF lens. (Auto Focus Lens) is made to include a drive for adjusting the focus.

Typically, the lens holder and the driving unit are disposed inside the case, and the image sensor is coupled to a printed circuit board fixed to the bottom of the case.

In the manufacturing of the camera module, a process of appropriately adjusting the distance between the lens holder and the image sensor is performed in order to focus. This process is performed by adjusting the distance between the lens and the image sensor by moving the lens holder disposed inside the case.

However, in order to proceed with the above process, it is necessary to use special equipment such as a dedicated wrench that can move the lens holder.

In this process, a considerable amount of time is required to reduce productivity, and when a force is applied to the lens holder using a dedicated wrench, there is a problem that the initial focus may be distorted due to a slight deformation of the driving unit.

In order to solve such a problem, a camera module as shown in FIGS. 1 and 2 has been developed.

1 is a perspective view of a conventional camera actuator module, Figure 2 is a cross-sectional structural view of a conventional camera actuator module.

As shown in FIGS. 1 and 2, the conventional camera module includes a housing 200 in which the lens holder 210 and the driving unit are built, and a base 300 in which the image sensor 420 is embedded. The housing 200 and the base 300 are coupled through screwing.

By combining the lens holder 210 with the housing 200 and the base 300 with the screw method as described above, the initial focus of the lens can be easily focused without a tool such as a wrench.

On the other hand, the driving unit serves to move the lens holder 210 in the optical axis direction, the driving unit is made of a coil 240, a magnet 232, the yoke 234 and the like.

When a current is applied to the coil 240, the lens holder 210 is moved in the optical axis direction by the interaction between the electric field generated by the coil 240 and the magnetic field generated by the magnet 232.

Meanwhile, the coil 240 receives power from the outside of the camera module.

To this end, a first brush 310 is formed on the top of the base 300 to apply a positive voltage to the coil 240 through the yoke 234, and a second brush 320 on the bottom of the base 300. ) Is applied to the coil 240 through the lower plate spring 270.

However, the conventional camera module has a problem in that the structure for supplying power to the coil 240 is complicated as described above, and the productivity is reduced due to the large number of parts and the number of assembling processes.

An object of the present invention is to provide a camera actuator module that can supply a current supplied to a coil through a simpler structure in a camera actuator module for screwing a housing and a base in which a lens holder is built.

In order to achieve the above object, the camera actuator module of the present invention comprises a lens holder with a lens; A housing surrounding the lens holder and having a threaded first coupling part; A driving unit mounted to the lens holder or the housing to drive the lens holder in an optical axis direction; A base disposed under the housing and having a second coupling part for screwing with the first coupling part of the housing and having an image sensor mounted therein; A terminal part for applying power to the driving part, wherein the terminal part comprises: a first (+) terminal part and a first (−) terminal part mounted under the housing and connected to the driving part; And a second (+) terminal portion and a second (-) terminal portion mounted on the base and supplying power by contacting the first (+) terminal portion and the first (−) terminal portion, respectively.

The first (+) terminal portion and the first (-) terminal portion are formed concentrically spaced around the first coupling portion, respectively, and the second (+) terminal portion and the second (-) terminal portion, respectively, the first It is arranged to contact the (+) terminal portion and the first (-) terminal portion, the second (+) terminal portion and the second (-) terminal portion, respectively, the elastic projection protrudes in the housing direction, the first (+ The terminal portion and the second (+) terminal portion, the first (-) terminal portion and the second (-) terminal portion are connected to each other by the elastic projections.

The first (+) terminal portion and the first (−) terminal portion are formed as concentric circles having a closed curve around the first coupling portion.

The second (+) terminal portion and the second (-) terminal portion are formed spaced apart concentrically around the second coupling portion, respectively, the first (+) terminal portion and the first (-) terminal portion, respectively, the second It is arranged to contact the (+) terminal portion and the second (-) terminal portion, the first (+) terminal portion and the first (-) terminal portion, respectively, the elastic projection protrudes in the base direction, the first (+ The terminal portion and the second (+) terminal portion, the first (-) terminal portion and the second (-) terminal portion are connected to each other by the elastic projections.

The second (+) terminal portion and the second (-) terminal portion wires are formed on the surface of the base, respectively, the terminal portion disposed on the outside of the second (+) terminal portion and the second (-) terminal portion The terminal portion formed in an open open curve shape and disposed inside is disposed across the open end of the terminal portion formed in a closed curve shape and disposed outside.

The driving unit may include a magnet coupled to any one of the lens holder and the housing; A coil coupled to the other of the lens holder or the housing; And a leaf spring elastically supporting the lens holder on the housing, wherein the first (+) terminal portion and the first (−) terminal portion are connected to the coil.

The terminal part is inserted into the housing or the base by injection molding.

The terminal portion is plated on the housing or base.

The terminal portion is made of FPCB and mounted to the housing or base.

According to the camera actuator module of the present invention as described above has the following advantages.

A terminal portion mounted on the lower portion of the housing and connected to the driving portion; By the second (+) terminal portion for supplying power and the second (-) terminal portion to supply the power, it is possible to supply the current supplied to the drive through a simpler structure.

In addition, by directly connecting the first (+) terminal portion and the first (-) terminal portion to the coil without an intermediate medium, it is possible to prevent the power is not applied to the coil due to the connection failure of the medium.

In addition, by disposing the (+) terminal portion and the (-) terminal portion in the form of concentric circles, the positive voltage and the negative voltage can be easily supplied without a complicated structure.

1 is a perspective view of a conventional camera actuator module,

2 is a cross-sectional structural view of a conventional camera actuator module,

3 is a perspective view of a camera actuator module according to a first embodiment of the present invention;

4 is an exploded perspective view of a camera actuator module according to a first embodiment of the present invention;

5 is an exploded perspective view of another direction of the camera actuator module according to the first embodiment of the present invention;

6 is a perspective view of a terminal unit according to the first embodiment of the present invention;

FIG. 7 is a perspective view illustrating a connection structure between a terminal part and a coil in FIG. 6;

8 is a cross-sectional view taken along line A-A of FIG.

9 is a perspective view of a camera actuator module according to a second embodiment of the present invention;

10 is an exploded perspective view of a camera actuator module according to a second embodiment of the present invention;

11 is an exploded perspective view of another direction of the camera actuator module according to the second embodiment of the present invention;

12 is a perspective view of a terminal unit according to a second embodiment of the present invention;

FIG. 13 is a perspective view illustrating a connection structure between a terminal part and a coil in FIG. 12;

FIG. 14 is a cross-sectional view taken along line B-B of FIG. 9.

제1실시예First embodiment

3 is a perspective view of a camera actuator module according to a first embodiment of the present invention, FIG. 4 is an exploded perspective view of a camera actuator module according to a first embodiment of the present invention, and FIG. 5 is a first embodiment of the present invention. Another direction exploded perspective view of a camera actuator module according to the present invention, Figure 6 is a perspective view of the terminal unit according to the first embodiment of the present invention, Figure 7 is a perspective view showing a connection structure of the terminal unit and the coil in Figure 6, Figure 8 is It is sectional drawing which looked at the AA line of FIG.

3 to 8, the camera actuator module of the present invention includes a lens holder 10, a housing 20, a driving unit 30, a base 40, and a terminal unit 50. It is done by

The lens holder 10 is formed in a cylindrical shape, the lens is embedded therein.

The flange portion 11 protrudes from the outer circumferential surface of the lens holder 10.

The housing 20 surrounds the lens holder 10 and is separated into an upper housing 21, a main body housing 22, and a lower housing 23.

The upper housing 21 is formed in a cylindrical shape having a hollow, and is disposed above the lens holder 10.

The body housing 22 is disposed in the direction of the outer circumferential surface of the lens holder 10, and an upper portion thereof is coupled to a lower portion of the upper housing 21.

The lower housing 23 has an upper portion coupled to a lower portion of the body housing 22, and a first coupling portion 24 having a hollow protrusion shape having a thread formed on an outer circumferential surface thereof is formed at the lower center thereof.

At this time, the diameter of the first coupling portion 24 is smaller than the diameter of the lower housing 23, the lower housing 23 is flat between the outer peripheral surface of the lower housing 23 and the first coupling portion (24) The bottom of is formed.

In addition, the flange portion 11 of the lens holder 10 is hung on the upper portion of the first coupling portion 24, so as to be moved up and down by the drive unit 30 in the housing 20. have.

The driving unit 30 is disposed inside the housing 20 and is mounted on the lens holder 10 or the housing 20 to drive the lens holder 10 in the optical axis direction, that is, in the vertical direction.

The driving unit 30 may include a magnet 32 coupled to either the lens holder 10 or the housing 20, and a coil coupled to the other of the lens holder 10 or the housing 20. 31), a yoke 33 for transmitting the magnetic force generated by the magnet 32 to the coil 31, and a leaf spring elastically supporting the lens holder 10 to the housing 20. .

In the present embodiment, the magnet 32 and the yoke 33 are coupled to the lens holder 10, and the magnet 32 is coupled to the upper surface of the lower housing 23 in detail.

The leaf spring has an upper circumferential surface coupled to an upper circumference of the lens holder 10 and an outer circumferential surface fixedly coupled between the upper housing 21 and the main body housing 22, and an inner circumferential surface of the leaf spring. It is coupled to the upper surface of the flange portion 11 and the outer peripheral surface is composed of a lower plate spring 35 fixedly coupled between the body housing 22 and the lower housing 23.

As described above, the lens holder 10 is elastically supported by the upper and lower plate springs 34 and 35 and the lower plate spring 35 to be maintained in a suspended state inside the housing 20.

At this time, the magnet 32 and the yoke 33 is coupled to the upper surface of the lower plate spring 35, the coil 31 is disposed below the lower plate spring (35).

Of course, the drive unit 30 may use any of the known structures.

The base 40 is disposed below the housing 20, and a second coupling portion 44 that is screwed with the first coupling portion 24 of the housing 20 is formed at a central portion of the housing 20.

The first coupling part 24 is formed in a hollow protrusion shape, and the second coupling part 44 is formed in a groove shape into which the first coupling part 24 is inserted.

On the contrary, the first coupling part 24 may be formed in a groove shape, and the second coupling part 44 may be formed in a hollow protrusion shape.

An image sensor 45 is disposed below the base 40 to capture an image incident through the lens holder 10.

The terminal part 50 is for applying power to the driving part 30. In detail, the terminal part 50 is connected to the coil 31 as shown in FIG. 7 to supply power to the coil 31. To supply.

As shown in FIGS. 6 and 7, the terminal part 50 includes a first (+) terminal part 51 and a first (+) terminal mounted on a lower surface of the lower housing 23 in detail. And a second (+) terminal portion 53 and a second (-) terminal portion 54 mounted on the upper portion of the base 40.

The first (+) terminal portion 51 is connected to the second (+) terminal portion 53, and the first (−) terminal portion 52 is connected to the second (−) terminal portion 54.

In addition, the first (+) terminal portion 51 and the first (-) terminal portion 52 is connected to the coil 31, the second (+) terminal portion 53 and the second (-) terminal portion ( 54 is connected to an external power source.

Therefore, the external power source is moved to the first (+) terminal portion 51 and the first (-) terminal portion 52 through the second (+) terminal portion 53 and the second (-) terminal portion 54. In addition, the first (+) terminal 51 and the first (-) terminal 52 is moved to the coil 31 is connected.

The first (+) terminal portion 51 and the first (-) terminal portion 52 are each formed concentrically spaced around the first coupling portion 24, the second (+) terminal portion 53 ) And the second (-) terminal portion 54 are disposed in contact with the first (+) terminal portion 51 and the first (-) terminal portion 52, respectively.

At this time, the first (+) terminal portion 51 and the first (-) terminal portion 52 is formed in a concentric circle of the closed curve shape around the first coupling portion (24).

As described above, the first (+) terminal portion 51 and the first (−) terminal portion 52 are formed in a closed curve shape of concentric circles spaced apart from each other, so as to rotate the housing 20 at any angle when the housing 20 is rotated. The terminal 51 and the first (-) terminal 52 may be in contact with the second (+) terminal 53 and the second (-) terminal 54.

In addition, since the first (+) terminal portion 51 and the first (−) terminal portion 52 are spaced apart from each other, there is no fear of crosstalk.

An elastic protrusion 55 protrudes from the second (+) terminal portion 53 and the second (-) terminal portion 54 toward the housing 20, respectively, so that the first (+) terminal portion 51 and The second (+) terminal portion 53, the first (-) terminal portion 52 and the second (-) terminal portion 54 are connected to each other by the elastic projection (55).

When the housing 20 is screwed to the base 40, the elastic protrusion 55 has the first (+) terminal portion 51 and the second (+) terminal portion 53 at a predetermined distance or more. When the first (-) terminal portion 52 and the second (-) terminal portion 54 are brought into contact with each other, and the housing 20 is further rotated to be fastened to the base 40, the elastic protrusion 55 is While compressively deforming, the terminal unit 50 is continuously connected to each other.

The terminal part 50 is inserted into the housing 20 or the base 40 by being inserted into the insert, formed by plating, or made of FPCB and mounted to the housing 20 or the base 40.

Hereinafter, looks at with respect to the assembly method and the operation of the present invention made of the above-described configuration.

The housing 20 in which the lens holder 10 is embedded is coupled to the base 40.

At this time, the first coupling part 24 formed on the bottom surface of the housing 20 is inserted into the second coupling part 44 formed on the upper surface of the base 40 and fastened by a screw method.

When the housing 20 or the base 40 is rotated and fastened, when the predetermined distance is inserted, the first (+) terminal portion 51 and the second (+) terminal portion 53 by the elastic protrusion 55 are inserted. ), The first (-) terminal portion 52 and the second (-) terminal portion 54 are in contact with each other.

In this state, the housing 20 is finely rotated to adjust the initial focus of the lens.

As the housing 20 is rotated, the housing 20 is further inserted in the direction of the base 40, and the elastic protrusion 55 is elastically deformed, and the first (+) terminal portion 51 and the second are formed. The positive terminal portion 53, the first (-) terminal portion 52 and the second (-) terminal portion 54 are continuously connected to each other.

When the initial focus adjustment is completed by rotating the housing 20 as described above, as shown in FIG. 8, the second (+) terminal portion 53 is in contact with the first (+) terminal portion 51. It is connected to the coil 31, the second (-) terminal portion 54 is in contact with the first (-) terminal portion 52 is connected to the coil 31.

Accordingly, a positive voltage and a negative voltage are applied to the coil 31 through the terminal part 50, and thus the mutual field between the electric field generated in the coil 31 and the magnetic field generated in the magnet 32 is applied to the coil 31. The lens holder 10 is moved in the vertical direction by the action.

As described above, the first (+) terminal portion 51 and the first (-) terminal portion 52 directly connected to the coil 31 is mounted on the lower portion of the housing 20, and the base 40 The second (+) terminal portion 53 and the second (-) terminal portion 54 which are in contact with the first (+) terminal portion 51 and the first (-) terminal portion 52 to supply power, respectively By attaching, power can be supplied to the coil 31 with a simpler structure.

In addition, by directly connecting the first (+) terminal portion 51 and the first (-) terminal portion 52 to the coil 31 without an intermediate medium, power is supplied to the coil 31 due to a connection failure of the medium. It can be prevented from being applied.

제2실시예Second embodiment

FIG. 9 is a perspective view of a camera actuator module according to a second embodiment of the present invention, FIG. 10 is an exploded perspective view of a camera actuator module according to a second embodiment of the present invention, and FIG. 11 is a second embodiment of the present invention. 12 is an exploded perspective view of another direction of the camera actuator module according to the present invention, FIG. 12 is a perspective view of a terminal unit according to a second embodiment of the present invention, FIG. 13 is a perspective view illustrating a connection structure of a terminal unit and a coil in FIG. It is sectional drawing which looked at the BB line of FIG.

9 to 14, the camera actuator module of the present invention includes a lens holder 10, a housing 20, a driving unit 30, a base 40, and a terminal unit 50. It is done by

Compared to the first embodiment, the second embodiment is different from the mounting position of the terminal unit 50, which will be mainly described.

As shown in FIGS. 12 to 14, the terminal part 50 includes a first (+) terminal part 51 and a first (+) terminal mounted on a lower surface of the lower housing 23 in detail. And a second (+) terminal portion 53 and a second (-) terminal portion 54 mounted on the upper portion of the base 40.

The second (+) terminal portion 53 and the second (-) terminal portion 54 are each formed concentrically spaced around the second coupling portion 44, the first (+) terminal portion 51 ) And the first (-) terminal portion 52 are disposed in contact with the second (+) terminal portion 53 and the second (-) terminal portion 54, respectively.

An elastic protrusion 55 protrudes from the first (+) terminal portion 51 and the first (-) terminal portion 52 toward the base 40, respectively, so that the first (+) terminal portion 51 and The second (+) terminal portion 53, the first (-) terminal portion 52 and the second (-) terminal portion 54 are connected to each other by the elastic projection (55).

In this case, the second (+) terminal portion 53 and the second (-) terminal portion 54 are each formed with wires exposed on the surface of the base 40, the second (+) terminal portion 53 and the first The terminal portion 50 disposed on the outside of the 2 (-) terminal portion 54 is formed in an open curved shape with one end open, and the terminal portion 50 disposed inside is formed in a closed curve and disposed outside. Is disposed across the open end of c).

In the present embodiment, the second (+) terminal portion 53 is disposed outside to form an open curved end, and the second (-) terminal portion 54 is disposed inside to form a closed curve shape. The second (-) terminal portion 54 is arranged across the open end of the second (+) terminal portion 53.

Other matters are the same as those of the first embodiment, and detailed description thereof will be omitted.

The camera actuator module of the present invention is not limited to the above-described embodiments, and may be variously modified and implemented within the scope of the technical idea of the present invention.

The present invention is applied to the camera actuator module for screwing and fastening the housing and the base in which the lens holder is built, so that the supply of current applied to the coil can be supplied through a simpler structure.

Claims

A lens holder with a built-in lens;

A housing surrounding the lens holder and having a threaded first coupling part;

A driving unit mounted to the lens holder or the housing to drive the lens holder in an optical axis direction;

A base disposed under the housing and having a second coupling part for screwing with the first coupling part of the housing and having an image sensor mounted therein;

Consists of a terminal unit for applying power to the drive unit,

The terminal portion,

A first (+) terminal portion and a first (−) terminal portion mounted on the lower portion of the housing and connected to the driving portion;

A camera actuator comprising a second (+) terminal portion and a second (-) terminal portion mounted on the base and supplying power by contacting the first (+) terminal portion and the first (−) terminal portion, respectively. module.
The method of claim 1,

The first (+) terminal portion and the first (-) terminal portion are formed spaced apart concentrically around the first coupling portion, respectively,

The second (+) terminal portion and the second (-) terminal portion is disposed in contact with the first (+) terminal portion and the first (-) terminal portion, respectively,

The second (+) terminal portion and the second (-) terminal portion, respectively, the elastic protrusion protrudes in the housing direction,

And the first (+) terminal portion and the second (+) terminal portion, and the first (-) terminal portion and the second (-) terminal portion are connected to each other by the elastic protrusions.
The method of claim 2,

The first (+) terminal portion and the first (-) terminal portion of the camera actuator module, characterized in that formed in a concentric circle of the closed curve shape around the first coupling portion.
The method of claim 1,

The second (+) terminal portion and the second (-) terminal portion are formed spaced apart concentrically around the second coupling portion, respectively,

The first (+) terminal portion and the first (-) terminal portion is disposed in contact with the second (+) terminal portion and the second (-) terminal portion, respectively,

The first (+) terminal portion and the first (-) terminal portion, respectively, the elastic projection protrudes in the base direction,

And the first (+) terminal portion and the second (+) terminal portion, and the first (-) terminal portion and the second (-) terminal portion are connected to each other by the elastic protrusions.
The method of claim 4, wherein

The second (+) terminal portion and the second (-) terminal portion of the wiring is formed on the surface of the base, respectively,

The terminal portion disposed on the outside of the second (+) terminal portion and the second (-) terminal portion is formed in an open curved shape with one end open, and the terminal portion disposed inside is formed in a closed curve shape to open the terminal portion disposed outside. Camera actuator module, characterized in that it is disposed across one end.
The method according to any one of claims 1 to 5,

The driving unit,

A magnet coupled to any one of the lens holder and the housing;

A coil coupled to the other of the lens holder or the housing;

It comprises a plate spring for elastically supporting the lens holder in the housing,

The first (+) terminal portion and the first (-) terminal portion of the camera actuator module, characterized in that connected to the coil.
The method according to any one of claims 1 to 5,

The terminal unit is inserted into the housing or the base is inserted into the camera actuator module.
The method according to any one of claims 1 to 5,

And the terminal portion is formed by plating the housing or the base.
The method according to any one of claims 1 to 5,

The terminal unit is made of FPCB camera actuator module, characterized in that mounted on the housing or base.