WO2014025167A1

WO2014025167A1 - Camera lens module

Info

Publication number: WO2014025167A1
Application number: PCT/KR2013/007004
Authority: WO
Inventors: 김기현; 김성원; 사진성; 이명원
Original assignee: 쓰리에이치비젼주식회사
Priority date: 2012-08-06
Filing date: 2013-08-02
Publication date: 2014-02-13
Also published as: KR101314178B1; CN104541199A

Abstract

Provided is a camera lens module. The present invention includes: a lens housing having at least one lens; a main frame accommodating the lens housing in an inner space; a cover portion having an exposure hole for exposing the lens housing, and assembled on one open side of the main frame; a module substrate mounted with an image sensor corresponding to the lens housing, and assembled on the other open side of the main frame; a support guide unit assembled with the main frame so as to guide and support the lens housing in the optical axis direction; and a driving unit driving the lens housing in the optical axis direction by using the interaction between the magnetic force of a magnetic body provided in the lens housing and the electric field of a coil provided on one side surface of the main frame. The coil is mounted on a pattern substrate exposed to the inner surface of one side outer wall of the main frame which corresponds to the magnetic body.

Description

Camera lens module

The present invention relates to a camera lens module, and more particularly, to a camera lens module that integrates a side board on which a coil is mounted to another member, thereby reducing the number of components and easily performing electrical connection with the module board. .

In recent years, portable terminals such as mobile phones and PDAs (hereinafter referred to as 'terminals') are being used not only for simple phone functions but also for multi-convergence with music, movies, TV, and games. One of the driving factors for the development is the camera lens module (CAMERA MODULE).

The camera lens module mounted in the terminal has recently been equipped with various additional functions such as an auto focus function (AUTO FOCUS: AF), an optical zoom, etc. in order to meet the change of the high pixel and the high function centered on user's request. It is changing.

Autofocus technology is a technology that maintains the optimal resolution of the captured image by automatically controlling the focus of the optical lens among the components constituting the camera lens module. In order to implement such an auto focusing technology, a camera module mounted in a terminal generally adopts an auto focusing actuator (AFA) for focusing.

Generally known auto focusing actuators (AFAs) can be classified into two types: a voice coil motor (VCM) type using a principle of interaction between a magnetic field and an electric field, and an encoding type having an automatic positioning function by a sensor.

Such VCM and encoding types can be distinguished from the viewpoint of structure and control.

In other words, the encoding type has the advantage of high driving accuracy as it has an operating mechanism based on the sensor and the control unit integrally mounted on its own, and requires expensive components such as the sensor and the controller. Therefore, the manufacturing cost is high. Therefore, in view of the market situation that seeks a reasonable price, it is disadvantageous compared to the VCM type in terms of cost.

The VCM type has been widely adopted due to the low manufacturing cost compared to the encoding type while having a relatively good driving accuracy. However, as the smart phone is developed to a high pixel of 8 million pixels or more recently, the position control precision, the focusing adjustment yield, and the unit separately The adoption rate is gradually decreasing due to high precision and weakness.

These VCM type actuators have various types of products, but basically, the principle is that the auto focus function is realized by using the electromagnetic force generated by the interaction of the magnetic field generated by the magnetic material and the electric field generated by the coil. Soy.

Korean Patent Laid-Open No. 10-2009-0026023 (2009.03.11) discloses a camera lens module that can easily move a lens housing and prevent foreign matters from being mixed during assembly.

As shown in FIG. 8, the camera lens module 100 includes a main frame 102 for accommodating the lens housing 101 while being disposed in an optical axis direction, and a support 103 for engaging with the lens housing while engaging with the main frame. And the cover part 104 which is combined with the main frame 102 to keep the lens housing 101 accommodated in the main frame and the support part 103 which is combined with the cover part 104 to move in the optical axis direction. And an adjustment member 105 to move the lens housing 101 along with the support 103 in the optical axis direction.

In addition, an inner substrate 109 having a magnetic body 107 which is a permanent magnet on one side of the lens housing 101, and a coil 106 corresponding to the magnetic body 107 on an inner surface of the support part 103. ), The lens housing 101 is moved in the optical axis direction by using an electromagnetic force generated by the interaction between the magnetic field of the magnetic body 107 and the electric field of the coil 106.

The support part 103 protrudes from the left and right sides of the guide protrusion 133 moving along the guide groove 113 formed in the lens housing 101, and the assembly protrusion 122 protruding from the main frame 102. The corresponding coupling grooves 132 are formed on the left and right sides and correspondingly assembled to seal the opened one side of the main frame 102 and to guide the optical axis movement of the lens housing 101.

A module substrate 123 on which the image sensor 121 is mounted is disposed below the main frame 102, and a connection terminal 123a formed at an end of the module substrate 123 is located below the internal substrate 109. The connection terminal 135 formed at the lower end of the side substrate 135 and the connection terminal 123a of the module substrate 123 are electrically connected to correspond to the connection terminal 109a formed at the end thereof.

However, the assembly of the conventional camera lens module 100 to fix the position of the side substrate 135 to the support 103 is performed manually by an operator and exposed to the lower end of the support 103. Since the connection of the connection terminal 135 of the substrate 135 to the connection terminal 123a of the module substrate 123 and the electrical connection is very cumbersome, there is a problem of lowering productivity.

The present invention is to solve the problems described above, the object is to integrate the side board on which the coil is mounted to the other member to reduce the number of components and the camera lens that can easily perform the electrical connection work with the module board We want to provide a module.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

As a specific means for achieving the above object, the present invention, a lens housing having at least one lens; A main frame accommodating the lens housing in an inner space; A cover part having an exposure hole for exposing the lens housing and assembled at an open side of the main frame; A module substrate mounted on the other open side of the main frame by mounting an image sensor corresponding to the lens housing; A guide support unit assembled to the main frame to guide the lens housing in an optical axis direction; A driving unit for driving the lens housing in an optical axis direction by an interaction between a magnetic force of a magnetic body provided in the lens housing and an electric field of a coil provided on one side of the main frame; It includes, wherein the coil provides a camera lens module, characterized in that mounted on the pattern circuit exposed on the inner surface of the outer wall of one side of the main frame corresponding to the magnetic material.

Preferably, the guide support is a pair of left and right vertical guide jaw correspondingly coupled to the left and right vertical guide grooves formed on the inner surface of the main frame, and the left and right pair of left and right pairs are disposed on the cutout formed in the upper side of the outer wall of the main frame It includes a connecting rod connecting between the vertical guide jaw.

Preferably, the pattern circuit is made of a conductive conductor that is integrally provided on the outer wall of the main frame to be injection molded and exposed to the inner surface corresponding to the magnetic material.

Preferably, the pattern circuit includes a first connection terminal exposed to a lower end of an outer wall of the main frame, and the first connection terminal is electrically connected to a second connection terminal formed on a module substrate assembled to the main frame. Correspondence is connected.

The present invention also provides a lens housing comprising at least one lens; A main frame accommodating the lens housing in an inner space; A cover part having an exposure hole for exposing the lens housing and assembled at an open side of the main frame; A module substrate mounted on the other open side of the main frame by mounting an image sensor corresponding to the lens housing; A guide support unit assembled to cover the open side opening of the main frame while guiding the lens housing in an optical axis direction; A driving unit for driving the lens housing in an optical axis direction by an interaction between a magnetic force of a magnetic body provided in the lens housing and an electric field of a coil provided on one side of the main frame; Including,

The coil provides a camera lens module, characterized in that mounted on the pattern circuit exposed on the inner surface of the guide support corresponding to the magnetic material.

Preferably, the guide support part is a pair of left and right vertical guide jaw correspondingly coupled to the left and right vertical guide grooves formed on the inner surface of the main frame, the vertical guide jaw integrally on the left and right sides of the inner surface corresponding to the lens housing And vertical walls on both left and right ends of the assembly jaw formed on both sides of the opening to cover and seal the one side opening of the main frame.

Preferably, the pattern circuit is formed of a conductive pattern which is first formed by using a laser on the vertical wall of the guide support to be injection-molded selectively, and then secondarily by electroless plating.

Preferably, the pattern circuit includes a first connection terminal exposed to the lower end of the vertical wall of the guide support, wherein the first connection terminal is electrically connected to the second connection terminal formed on the module substrate assembled to the main frame. The corresponding connection is made to be connected.

According to the present invention as described above has the following advantages.

(1) Since the coil is mounted on the outer wall of one side of the main frame in which the lens housing is accommodated and the pattern circuit electrically connected to the module board is integrated, the board on which the coil is mounted can be integrally provided in the main frame. The manufacturing cost can be reduced by reducing the total number of components and the productivity of work can be improved by easily performing electrical connection work with the module board.

(2) The board on which the coil is mounted is integrally provided with a pattern circuit which is mounted on the vertical wall of the guide support part assembled on the open side of the main frame in which the lens housing is accommodated and electrically connected to the module substrate. Since it can be provided integrally, the total number of components of the module can be reduced to reduce manufacturing costs, and electrical connection with the module substrate can be easily performed to increase work productivity.

1A and 1B are overall perspective views illustrating a camera lens module according to a first embodiment of the present invention.

2A and 2B are exploded perspective views illustrating a camera lens module according to a first embodiment of the present invention.

3A to 3C are perspective views illustrating a main frame employed in a camera lens module according to a first embodiment of the present invention.

4A and 4B are detailed views illustrating the pattern circuit of the main frame employed in the camera lens module according to the first embodiment of the present invention.

5A and 5B are exploded perspective views illustrating a camera lens module according to a fifth embodiment of the present invention.

6A to 6C are perspective views illustrating a guide support unit employed in the camera lens module according to the first embodiment of the present invention.

7A and 7B are detailed views illustrating the pattern circuit of the guide support unit employed in the camera lens module according to the first embodiment of the present invention.

8 is an exploded perspective view illustrating a camera lens module according to the prior art.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing in detail the structural principle of the preferred embodiment of the present invention, when it is determined that the detailed description of the related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, the same reference numerals are used for parts having similar functions and functions throughout the drawings.

In addition, throughout the specification, when a part is 'connected' to another part, it is not only 'directly connected' but also 'indirectly connected' with another element in between. Include. In addition, the term 'comprising' a certain component means that the component may be further included, without excluding the other component unless specifically stated otherwise.

The camera lens module 1 according to the first exemplary embodiment of the present invention has a lens housing 10 and a main body as shown in FIGS. 1A, 4B, 4B, 4C, and 4C. The frame 20, the cover 30, the module substrate 40, the guide support 50, and the driving unit 60 are included.

The lens housing 10 is a substantially cylindrical barrel structure having at least one lens in the optical axis direction in the inner space,

The upper surface of the lens housing 10 is formed through the lens hole 12 for exposing the lens, and on one side of the flat portion to securely install the magnetic body 62 made of permanent magnets to generate a magnetic force of a certain intensity ( 14).

Right and left sides of the lens housing 10 may include guide

protrusions

16 and 16 for guiding movement of the lens housing 10 in the optical axis direction corresponding to the guide support 50.

The main frame 20 may be formed of a substantially rectangular parallelepiped box structure having an internal space of a predetermined size so as to internally accommodate the lens housing 10 in the optical axis direction.

The upper and lower portions of the main frame 20 are open, respectively, the one side outer wall 22 corresponding to the guide support 50 may be partially open or fully open, in the first embodiment the guide support 50 ) And partially open the partial region of the outer wall.

The cover part 30 penetrates the exposure hole 32 that exposes the lens hole 12 of the lens housing 10 disposed on the main frame 20 to the outside in a substantially central area, thereby forming the main frame 20. The cover member is assembled with the main frame so as to seal the upper part of the upper part of the figure.

An elastic body such as a coil spring may be disposed between the cover part 30 and the lens housing 10 and the lower portion of the lens housing so as to return the lens housing moving in the optical axis direction to an initial state.

The module substrate 40 has an image sensor 42 mounted on an upper surface corresponding to the lens housing 10 to detect an image of a subject incident through a lens and converts an electric signal into the main frame 20. It is a substrate member assembled with the main frame to seal the lower portion of the other side that is open.

The guide support 50 is a guide support member assembled to the main frame 20 to guide the lens housing 10 in the optical axis direction.

The guide support 50 is a pair of left and right vertical guide jaw (54, 54) and correspondingly coupled to the left and right vertical guide grooves 24 formed on the inner surface of the main frame 20, and the main frame 20 It is disposed on the incision portion (22a) formed on the top of one side outer wall 22 and includes a connecting table 55 for connecting between the left and right pair of vertical guide jaw (54).

It is formed between the cover portion 30 and the main frame 20 by the connecting table 55 disposed on the cutout portion 22a formed on the top of one outer wall 22 of the main frame 20. It will seal the gap.

Here, the guide support 50 is formed by recessing the guide groove (54a, 54a) in the vertical guide jaw (54, 54) corresponding to the guide projection jaw (16, 16) formed on the left and right sides of the lens housing, At least one friction reducing member 56 such as steel balls is disposed between the

guide protrusions

16 and 16 and the

guide grooves

54a and 54a to the guide support 50, which is a fixed member fixed to the main frame 20. The frictional resistance and the frictional force generated during the optical axis movement of the lens housing 10 as the movable member can be minimized.

In this case, the guide support 50 is provided with a friction reducing member to guide and support the lens housing 10 in the optical axis direction, but the present invention is not limited thereto, and the guide support 50 is assembled to be guided in a guide groove formed in the lens housing. It may be provided as a guide hole provided as a guide jaw or assembled on the guide vertical axis.

The driving unit 60 is an interaction between the magnetic force of the magnetic body 62 provided on one side of the lens housing 10 and the electric field of the coil 64 provided on the inner surface of one outer wall 22 of the main frame 20. By generating the external force to drive the lens housing 10 in the optical axis direction.

Meanwhile, the coil 64 constituting the driving unit 60 is electrically connected to the pattern circuit 66 provided to expose the inner surface of the outer wall 22 of one side of the main frame 20 corresponding to the magnetic body 62. The inner wall 22 of the outer wall 22 may be mounted at any position.

Inside the coil 64 electrically connected to the pattern circuit 66, the coil is configured to electrically connect the hall sensor 68 and the drive driver 69, which sense and control the position of the lens housing, with the pattern circuit, respectively. Like 64, the inner wall 22 is mounted at any position on the inner surface.

The pattern circuit 66 may be formed of a conductive conductor disposed in the cavity to be exposed to the outside while being integrally provided on the outer wall 22 of the main frame 20 which is injection molded by the resin injected into the cavity.

In addition, a first connection terminal 65 is formed on the outer surface of the outer wall of the main frame 20 to be exposed to the lower end, and the first connection terminal 65 is the main frame 20 and the module substrate 40. ) Are connected to each other so as to be electrically connected to the second connection terminal 44 formed on the upper surface of the module substrate 40 assembled under the main frame.

In addition, the first connection terminal 65 exposed to the outer surface of the outer wall 22 is a via hole 66 formed through the outer wall of the main frame 20, as shown in Figure 4 (a) (b) It is electrically connected to the pattern circuit 66 via).

Accordingly, the hall sensor 68 and the driving driver 69 are mounted on the pattern circuit 66 formed on the outer wall 22 of the main frame 20 together with the coil 64 of the driving unit 60. By connecting the first connecting terminal 65 formed on the lower end of the outer wall 22 and the second connecting terminal 44 of the module substrate 40 to each other on the inner side of the support part assembled on the opened side of the main frame. It is possible to manufacture and complete the camera lens module without the need to assemble a separate side board.

The camera lens module 1a according to the second exemplary embodiment of the present invention has a lens as in the first embodiment, as shown in FIGS. 5 (a) (b) and 6 (a) (b) (c). The housing 10, the main frame 20, the cover 30, the module substrate 40, the guide support 50a, and the driver 60 are included.

Here, in the description of the second preferred embodiment of the present invention, the same reference numerals in the drawings or the same reference numerals for the same configuration as the first embodiment or easily understood through the first embodiment, Detailed descriptions may also be omitted.

The guide support part 50a is a guide support member assembled to cover and seal an open one side opening of the main frame 20 corresponding to the lens housing 10 while supporting the lens housing 10 in the optical axis direction.

The guide support part 50a includes a pair of left and right

vertical guide jaws

54 and 54 corresponding to the left and right vertical guide grooves 24 formed on the inner surface of the main frame 20, and the

vertical guide jaw

54, 54 may be integrally provided at left and right sides of the inner surface corresponding to the lens housing, and both left and right ends thereof may be assembled to assembly jaws 24a formed at both sides of the opening to cover and seal one side opening of the main frame 20. Straight wall 51 is included.

By the vertical wall 51 which is assembled in one opening of the main frame 20, the main frame 20 is all the vertical outer wall is sealed.

Here, the guide support 50a is

guide grooves

54a and 54a in

vertical guide jaws

54 and 54 corresponding to guide

protrusions

16 and 16 formed on the left and right sides of the lens housing, as in the first embodiment. And a fixing member fixed to the main frame 20 by placing at least one friction reducing member 56 such as steel balls between the

guide protrusions

16 and 16 and the

guide grooves

54a and 54a. The frictional resistance and the frictional force generated when the lens housing 10 which is the moving member in the optical axis direction with respect to the guide support 50a can be minimized.

In this case, the guide support 50a is provided with a friction reducing member to guide and support the lens housing 10 in the optical axis direction, but the present invention is not limited thereto. It may be provided as a guide hole provided as a guide jaw or assembled on the guide vertical axis.

Like the first embodiment, the driving unit 60 includes a magnetic force of the magnetic body 62 provided on one side of the lens housing 10 and a coil 64 provided on an inner surface of the vertical wall 51 of the guide support 50a. The external force for driving the lens housing 10 in the optical axis direction is generated by the interaction between the electric fields.

Meanwhile, the coil 64 constituting the driving unit 60 is electrically connected to the pattern circuit 63 provided to be exposed to the inner surface of the vertical wall 51 of the guide support 50a corresponding to the magnetic body 62. It is to be mounted at any position on the inner surface of the vertical wall (51).

Inside the coil 64, which is electrically connected to the pattern circuit 63, the coil is configured to electrically connect the hall sensor 68 and the drive driver 69, which sense and control the position of the lens housing, with the pattern circuit, respectively. Similar to 64, it is mounted at any position on the inner surface of the vertical wall 51).

In this case, the pattern circuit 63 may first form a predetermined pattern selectively using a laser on the vertical wall 51 of the guide support part which is injection-molded by the resin injected into the cavity, and then use the electroless plating. It is formed by a MID (Molded Interconnect Device) method for forming a conductive pattern.

In addition, a first connection terminal 67 is formed on an outer surface of the vertical wall 51 and extends from the pattern circuit 63 to be exposed to a lower end of the vertical wall 51, and the first connection terminal ( 67 corresponds to be electrically connected to the second connection terminal 44 formed on the upper surface of the module substrate 40 assembled to the lower part of the main frame when the main frame 20 and the module substrate 40 are mutually coupled. Connected.

In addition, as shown in FIG. 7, the pattern circuit 63 formed on the inner surface of the vertical wall 51 and the first connection terminal 67 exposed on the outer surface of the vertical wall 51 are formed in the coil. A series of circuits electrically connecting the 64 and the module substrate 40 to each other are formed.

Accordingly, the hall sensor together with the coil 64 of the drive unit 60 in the pattern circuit 63 formed on the vertical wall 51 of the guide support 50a assembled in one open opening of one side of the main frame 20. 68 and the drive driver 69 are mounted, and the first connecting terminal 67 formed at the lower end of the vertical wall 51 and the second connecting terminal 44 of the module substrate 40 are interconnected. It is possible to manufacture and complete the camera lens module without the need of assembling a separate side board on the inner side of the support that is assembled on the opened side of the main frame.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge.

Claims

A lens housing having at least one lens;

A main frame accommodating the lens housing in an inner space;

A cover part having an exposure hole for exposing the lens housing and assembled at an open side of the main frame;

A module substrate mounted on the other open side of the main frame by mounting an image sensor corresponding to the lens housing;

A guide support unit assembled to the main frame to guide the lens housing in an optical axis direction;

A driving unit for driving the lens housing in an optical axis direction by an interaction between a magnetic force of a magnetic body provided in the lens housing and an electric field of a coil provided on one side of the main frame; Including,

The coil is mounted on the pattern circuit exposed on the inner surface of the outer wall of one side of the main frame corresponding to the magnetic material.
The method of claim 1,

The guide support part is disposed on the left and right pair of vertical guide jaws correspondingly coupled to the left and right vertical guide grooves formed on the inner surface of the main frame, and the left and right pair of vertical guide jaws are disposed on the cutout formed in the upper side of the outer wall of the main frame. Camera lens module comprising a connecting rod for connecting between.
The method of claim 1,

The pattern circuit is a camera lens module, characterized in that consisting of a conductive conductor that is integrally provided on the outer wall of the main frame to be injection-molded and externally exposed on the inner surface corresponding to the magnetic material.
The method of claim 1,

The pattern circuit may include a first connection terminal exposed to a lower end of an outer wall of the main frame, and the first connection terminal may be correspondingly connected to be electrically connected to a second connection terminal formed on a module substrate assembled to the main frame. Camera lens module, characterized in that.
A lens housing having at least one lens;

A main frame accommodating the lens housing in an inner space;

A cover part having an exposure hole for exposing the lens housing and assembled at an open side of the main frame;

A module substrate mounted on the other open side of the main frame by mounting an image sensor corresponding to the lens housing;

A guide support unit assembled to cover the open side opening of the main frame while guiding the lens housing in an optical axis direction;

A driving unit for driving the lens housing in an optical axis direction by an interaction between a magnetic force of a magnetic body provided in the lens housing and an electric field of a coil provided on one side of the main frame; Including,

And the coil is mounted on a pattern circuit exposed on the inner surface of the guide support corresponding to the magnetic material.
The method of claim 5,

The guide support part is provided with a pair of left and right vertical guide jaw correspondingly coupled to the left and right vertical guide grooves formed on the inner surface of the main frame, the vertical guide jaw integrally on the left and right sides of the inner surface corresponding to the lens housing, And a vertical wall on which left and right ends are assembled to assembly jaws formed at both sides of the opening to cover and seal the opening of one side of the main frame.
The method of claim 5,

The pattern circuit is a camera lens module, characterized in that formed on the vertical wall of the guide support to be injection-molded by using a laser to selectively form a predetermined pattern first, and then a conductive pattern formed by secondary using electroless plating .
The method of claim 5,

The pattern circuit may include a first connection terminal exposed to a lower end of a vertical wall of the guide support, and the first connection terminal may be electrically connected to a second connection terminal formed on a module substrate assembled to the main frame. Camera lens module, characterized in that connected.