KR100960575B1 - Compact image photographing device - Google Patents

Abstract

The present invention is to provide a compact camera module that is formed integrally with the leaf spring of the FPCB terminal portion, the positive electrode and the negative electrode are non-electrically integrated to simplify and facilitate assembly.

The compact camera module of the present invention includes a housing disposed above the image sensor; A lens holder including a lens therein and mounted to be moved up and down in the housing; A driving unit disposed between the housing and the lens holder to vertically move the lens holder when power is applied; A leaf spring mounted to the housing to elastically support the lens holder up and down; A control unit disposed under the housing to adjust power applied to the driving unit; It is made, including, the leaf spring, the lower insulating layer; A first conductor laminated on the lower insulating layer; A second conductor stacked on the lower insulating layer and spaced apart from the first conductor; An upper insulating layer stacked on the first conductor and the second conductor and formed to expose a portion of the first conductor and the second conductor; And the first conductor and the second conductor partially exposed are connected to the control unit and the driving unit so as to electrically communicate with the control unit and the driving unit.

 Camera, Module, Leaf Spring

Description

Small Camera Module {COMPACT IMAGE PHOTOGRAPHING DEVICE}

The present invention relates to a small camera module, and more particularly, to a small camera module equipped with a leaf spring for elastically supporting a vertically driven lens holder in the vertical direction.

Small communication devices such as mobile phones are equipped with a small camera module.

1 and 2 show a conventional small camera module 400.

The small camera module 400 shown in FIGS. 1 and 2 includes a lens group 500, a lens holder 550, a housing 600, a leaf spring 650, a cover 750, a driver 800, and a controller. 850.

The lens group 500 is composed of a plurality of lenses for changing the magnification of the subject, and is inserted into and fixed to the lens holder 550.

The lens holder 550 in which the lens group 500 is embedded is disposed in the housing 600 and is mounted to be moved up and down.

In this case, a driving unit 800 is mounted between the housing 600 and the lens holder 550 to float the lens holder 550 by electromagnetic force when power is applied.

Specifically, the driving unit 800 is mounted on the magnet 810 mounted on the housing 600, the lens holder 550, and magnetic flux emitted from the magnet 810 when power is supplied from the control unit 850. Received by the coil 820 for generating a force for driving the lens holder 550 in the optical axis direction.

The driving unit 800 is connected to the control unit 850 for controlling the power applied to the coil 820 is supplied with power.

The leaf spring 650 is elastically supported to guide the lens holder 550 up and down to flow in the optical axis direction of the lens group 500.

In general, the leaf spring 650 is mounted on the upper and lower ends of the lens holder 550, respectively, to support the lens holder 550. In particular, the leaf spring 650 mounted at the lower end is the coil 820. It is connected to and serves to transfer the power of the controller 850 to the coil 820 through the FPCB terminal 760.

In addition, the leaf spring 650 is electrically connected to the disconnection of the coil 820 to prevent the coil 820 made of a thin wire to be broken to minimize the movement of the coil 820.

The leaf spring 650 is electrically connected to the FPCB terminal 760 which is attached to the outside of the cover 750, the FPCB terminal 760 is connected to the control unit 850 to the leaf spring 650. Transfer power to the coil 820 connected to.

At this time, the leaf spring 650 disposed on the lower side is separated into two and serves as a negative electrode terminal and a positive electrode terminal, respectively, and is made of a metal material through which electricity is good.

However, since the plate spring 650 is separated from the negative electrode terminal and the positive electrode terminal, the assembly process is complicated, and the process of connecting back to the FPCB terminal 760 attached to the outside of the cover 750 is performed. Since it has to go through, there exists a problem that assembly property falls.

Of course, it may be formed by extending the terminal in the leaf spring 650, the leaf spring 650 has a very thin thickness is difficult to fix the position.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a compact camera module in which the leaf spring is integrally formed with the FPCB terminal portion, and the anode terminal and the cathode terminal are non-electrically integrated to simplify and facilitate assembly. There is a purpose.

In order to achieve the above object, the compact camera module of the present invention includes a housing disposed on the upper part of the image sensor; A lens holder including a lens therein and mounted to be moved up and down in the housing; A driving unit disposed between the housing and the lens holder to vertically move the lens holder when power is applied; A leaf spring mounted to the housing to elastically support the lens holder up and down; A control unit disposed under the housing to adjust power applied to the driving unit; , ≪ / RTI >

The leaf spring may include a lower insulating layer; A first conductor laminated on the lower insulating layer; A second conductor stacked on the lower insulating layer and spaced apart from the first conductor; An upper insulating layer stacked on the first conductor and the second conductor and formed to expose a portion of the first conductor and the second conductor; And the first conductor and the second conductor partially exposed are connected to the control unit and the driving unit so as to electrically communicate with the control unit and the driving unit.

The leaf spring may include a first support part mounted to the housing; A second support part mounted to the lens holder; An elastic part elastically connecting between the first support part and the second support part; An extension part extending from the first support part in a lateral direction of the housing; The second support part includes the upper insulating layer and the lower insulating layer in contact with each other to non-electrically connect the first conductor and the second conductor.

A portion of the first conductor and the second conductor is exposed on the second support portion, and a first terminal portion is formed to be connected to the driving portion, and the extension portion exposes a portion of the first conductor and the second conductor. A second terminal portion connected to the controller is formed.

The driving unit may include a coil member wound up and down in different directions along an outer surface of the lens holder; A magnet disposed adjacent to the coil member and mounted to the housing; It is made, including, wherein the lens holder is formed with an escape groove in which the disconnection of the coil member is formed, the escape groove is formed at a position where the elastic portion is disposed.

The camera module may further include a cover mounted to cover the housing on the upper portion of the housing, wherein the housing is formed with a seating groove into which the extension part is bent downward and inserted into the housing, and the extension part is assembled when the cover is assembled. The housing is bent in the lateral direction and inserted into the seating groove.

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

A leaf spring for vertically and elastically supporting the lens holder includes the first and second conductors stacked between the lower insulating layer, the upper insulating layer, the lower insulating layer and the upper insulating layer. By exposing a portion of the first conductor and the second conductor and connecting the control unit and the driving unit, the leaf spring is integrally formed with the terminal connecting the control unit, thereby reducing the number of parts and simplifying assembly.

Since the upper insulating layer and the lower insulating layer of the second support part are in contact with each other and non-electrically connect the first conductor and the second conductor, the separated first conductor and the second conductor can be assembled together. Has the effect of facilitating sex.

By forming the first terminal portion in the second support portion and the second terminal portion in the extension portion, the first terminal portion and the second terminal portion are disposed adjacent to the control portion and the driving portion to facilitate connection. It is effective.

By forming an escape groove through which disconnection of the coil member passes through the lens holder, and forming the escape groove at a position where the elastic portion is disposed, minimizing the interference of the elastic portion with the lens holder and disconnection of the coil member. This prevents the interference with the housing.

The extension part is bent downwardly and inserted into the housing to form a seating groove, and the extension part is bent in the lateral direction of the housing when the cover is assembled to be inserted into the seating groove, thereby guiding the position of the extension part and the extension. There is an effect of preventing the addition and damage to the housing exposed.

Figure 3 is a perspective view showing a small camera module according to the present invention, Figure 4 is an exploded perspective view showing a small camera module according to the present invention, Figure 5 is an exploded perspective view showing a leaf spring according to the present invention, Figure 6 is a plan view of a leaf spring according to the present invention, Figure 7 is a cross-sectional view of a small camera module according to the present invention as seen from AA of Figure 3, Figure 8 is a cross-sectional view of a small camera module according to the present invention as seen from BB of FIG. to be.

4 to 8, the compact camera module of the present invention includes a housing 110, a lens holder 120, a driver 130, a cover 140, a leaf spring 150, and a controller 160. It is done by

The housing 110 has an hexahedral shape, the upper and lower ends of which are opened, and the lens holder 120 is disposed therein.

In addition, insertion grooves 111 through which the inner and outer surfaces of the housing 110 pass through are formed at both sides of the housing 110.

The insertion groove 111 is formed in communication with the inside and the outside of the housing 110 in a rectangular shape.

In addition, the side of the housing 110 in which the insertion groove 111 is formed, the fixing protrusion 112 is protruded on both sides of the insertion groove 111.

The fixing protrusion 112 is formed to protrude toward the outer surface of the housing 110 and the top is inclined downward so that the cover 140 is gently inserted into the housing 110 when the cover 140 is assembled. Be sure to

The lens holder 120 has a hexahedron shape and has an opening hole formed at an upper and lower end thereof in a central portion thereof.

A plurality of lenses (not shown) for adjusting the magnification of the subject are inserted into the opening holes.

In addition, the upper end of the lens holder 120 is formed to extend in the lateral direction to contact the upper surface of the housing 110.

That is, the upper end of the lens holder 120 is in contact with the upper surface of the housing 110 is supported so as not to move to the lower portion of the housing 110.

The lens holder 120 is disposed above the control unit 160 in which the image sensor is mounted together with the housing 110 so that an image of a subject passing through the lens is captured by the image sensor.

In addition, the driving unit 130 is disposed between the lens holder 120 and the housing 110 to move the lens holder 120 up and down.

Specifically, the driving unit 130 has a coil member 131 wound around the optical axis of the lens on the side of the lens holder 120 and a magnet 132 disposed adjacent to the side of the coil member 131. It is made to include.

The coil member 131 is wound around the side of the lens holder 120 in the vertical direction and the thin wire, respectively, the electromagnetic force generated when the power is applied to move the lens holder 120 up and down.

The magnet 132 is formed in a hexahedral shape of the upper and lower two poles, and is inserted into the insertion groove 111 of the housing 110.

Meanwhile, the cover 140 is mounted to the housing 110 to surround the top and side surfaces of the housing 110.

The cover 140 has a rectangular shape and the outer surface is bent in the direction of the housing 110 to surround the housing 110.

In addition, the side of the cover 140 is formed with a fixing groove 141 is inserted into the fixing protrusion 112 protruding in the side of the housing 110 is formed so that the cover 140 is fixed to the housing 110. do.

In addition, the fixing groove 141 is formed such that one end adjacent to the side edge of the cover 140 is opened.

That is, the fixing groove 141 is open at one end in the lateral direction so that the side of the cover 140 in contact with the fixing protrusion 112 elastically moves.

As described above, the fixing protrusion 112 is formed on the side of the housing 110, and the fixing protrusion 141 is formed on the side of the cover 140 to insert the fixing protrusion 112. By forming one end adjacent to the side edge of the cover 140 of the open), when the cover 140 is assembled, the cover 140 in contact with the fixing protrusion 112 is elastically opened to facilitate assembly. It's effective.

In addition, the cover 140 is made of a magnetic material to fix the magnet 132 inserted into the insertion groove 111 to the cover 140.

That is, as shown in FIG. 7, the magnet 132 is attached to the inner surface of the cover 140 by magnetic force.

In this case, the insertion groove 111 may be formed through the inner surface and the outer surface of the housing 110, thereby minimizing the gap between the magnet 132 and the cover 140 to reduce the overall size.

As such, the insertion groove 111 into which the magnet 132 is inserted is formed on the side of the housing 110, and the cover 140 is formed of a magnetic material to insert the magnet 132 into the insertion groove 111. By fixing the cover 140 to the cover 140, the magnet 132 can be fixed without using an adhesive, thereby improving assembly performance and shortening assembly time.

Also, in the related art, a yoke member made of a magnetic material is attached to an outer surface of the magnet 132 to induce a magnetic field generated in the magnet 132 in the direction of the lens holder 120 and increase an electromagnetic force.

However, in the present invention, the cover 140 is made of a magnetic material, thereby having the same function as the yoke member that collects the magnetic force of the magnet 132 in the direction of the lens holder 120, thereby reducing the number of parts to improve assembly and overall size. Has the effect of reducing

On the other hand, the leaf spring 150 is mounted on the upper end of the lens holder 120.

The leaf spring 150 is a thin flexible circuit board (FPCB), a part of which is in contact with the lens holder 120 and the other part is mounted to the housing 110 to elastically support the lens holder 120.

In detail, the leaf spring 150 includes a lower insulating layer 151, a first conductor 152, a second conductor 153, and an upper insulating layer 154.

The lower insulating layer 151 is made of an insulator material, and is mainly made of polyamide-based synthetic resin.

The first conductor 152 is stacked on the lower insulating layer 151, and the second conductor 153 is stacked on the lower insulating layer 151, but the first conductor 152 is stacked on top of the lower insulating layer 151. Spaced apart.

That is, the first conductor 152 and the second conductor 153 are separately formed symmetrically with respect to the lens holder 120.

In addition, the upper insulating layer 154 is stacked on the first conductor 152 and the second conductor 153.

Like the lower insulating layer 151, the upper insulating layer 154 is made of an insulator material to wrap the remaining portions of the upper insulating layer 152 except for the portions of the first conductor 152 and the second conductor 153 so as not to be exposed to the outside.

In this case, the first conductor 152 and the second conductor 153 are made of an electrically conductive metal material, and the control unit 160 and the driving unit 130 are partially connected to the upper insulating layer 154. The controller 160 is electrically connected to the controller 160 and the driver 130.

The lower spring 151, the upper insulating layer 154, the lower insulating layer 151, and the upper insulating layer 154 may support the plate spring 150 that vertically and elastically supports the lens holder 120. The control unit 160 and the first conductor 152 and the second conductor 153 stacked between the first conductor 152 and the second conductor 153 are exposed to expose a part of the first conductor 152 and the second conductor 153. By connecting with the driving unit 130, the leaf spring 150 is formed integrally with the terminal connecting with the control unit 160 has the effect of reducing the number of parts and simplify assembly.

In addition, the leaf spring 150 is composed of a first support portion 150a, a second support portion 150b, an elastic portion 150c and an extension portion 150d, as shown in FIGS. 5 and 6.

The first support part 150a is positioned at an edge portion of the leaf spring 150 and is formed at four locations symmetrical with respect to the lens holder 120.

The first support part 150a is provided with a groove into which a protrusion protruding from the upper surface of the housing 110 is inserted to fix the leaf spring 150 so as not to move horizontally from the upper surface of the housing 110. .

The second support part 150b is mounted on an upper surface of the lens holder 120 in a circular ring shape.

At this time, the second support portion 150b is formed such that the inner circumferential surface thereof does not move left and right in contact with the outer circumferential surface of the lens holder 120.

In addition, the second support part 150b non-electrically connects the first conductor 152 and the second conductor 153 formed symmetrically about the lens holder 120.

That is, the second support part 150b is formed between the first conductor 152 and the second conductor 153 such that the upper insulating layer 154 and the lower insulating layer 151 are in contact with each other. The first conductor 152 and the second conductor 153 are integrally connected.
In other words, as shown in FIG. 6, the second support part 150b has the first conductor 152 and the second conductor 153 spaced apart from each other with the upper insulating layer 154 and the lower part interposed therebetween. The insulating layer 151 is made in contact with each other.

As such, the upper insulating layer 154 and the lower insulating layer 151 of the second support part 150b contact each other to non-electrically connect the first conductor 152 and the second conductor 153. When assembling, the first conductor 152 and the second conductor 153 separated from each other may be assembled at a time, thereby facilitating assembly.

The elastic part 150c is formed between the first support part 150a and the second support part 150b to elastically connect the first support part 150a and the second support part 150b.

That is, the elastic part 150c is formed to be bent in the horizontal direction so that the second support part 150b is tensionally contracted in the vertical direction with respect to the first support part 150a when the lens holder 120 moves up and down.

The extension part 150d extends from the first support part 150a in the lateral direction of the housing 110.

That is, the extension part 150d is connected to two first support parts 150a adjacent to the side surface of the housing 110 and protrudes in the side direction of the housing 110.

As shown in FIG. 8, the extension part 150d is bent downward to contact the side surface of the housing 110 when the cover 140 is assembled to the housing 110.

In this case, a mounting groove 113 into which the extension part 150d is inserted is formed at a side surface of the housing 110.

The depth of the seating groove 113 is equal to or larger than the thickness of the extension part 150d so that the extension part 150d does not protrude to the outside of the car recess 113.

As described above, the extension part 150d is formed downwardly bent in the housing 110 so as to be inserted into the mounting groove 113, and when the extension part 150d is assembled with the cover 140, the housing 110 is formed. By bending in the lateral direction and inserting into the seating groove 113, there is an effect of guiding the location of the extension part 150d and preventing the extension part 150d from being exposed to the housing 110 and being damaged. .

Meanwhile, a portion of the first conductor 152 and the second conductor 153 is exposed on the second support part 150b to form a first terminal part 155 connected to the driving part 130, and the extension part A portion of the first conductor 152 and the second conductor 153 is exposed at 150d to form a second terminal portion 156 connected to the controller 160.

The first terminal portion 155 is formed at both ends of the second support portion 150b adjacent to the elastic portion 150c, and disconnection of the coil member 131 mounted on the side of the lens holder 120 is formed. Soldering is fixed.

At this time, the upper end of the lens holder 120 is formed with an escape groove 121 through which the disconnection of the coil member 131 is disposed.

The escape groove 121 is vertically open so that the coil member 131 mounted at the side of the lens holder 120 is connected to the leaf spring 150 mounted at the upper end of the lens holder 120.

The escape groove 121 prevents disconnection of the coil member 131 due to interference with other components.

In addition, the escape groove 121 is formed in the lower direction of the elastic portion 150c of the leaf spring 150.

That is, the elastic part 150c is disposed up and down between the housing 110 and the lens holder 120 when the lens holder 120 is raised, wherein the elastic part 150c is disposed in the escape groove 121. The insertion and placement may be prevented from interfering with the lens holder 120.

The second terminal portion 156 is formed at the center of the extension portion 150d and is adjacent to the lower end of the housing 110.

That is, since the control unit 160 connected to the second terminal unit 156 is disposed under the housing 110, the second terminal unit 156 may be formed adjacent to the lower end of the housing 110. Do.

The first terminal portion 155 is formed in the coil member 131 and the second support portion 150b, and the second terminal portion 156 is formed in the extension portion 150d. 155 and the second terminal unit 156 are disposed adjacent to the control unit 160 and the driving unit 130, respectively, to facilitate the connection.

The following describes the operation state of the small camera module of the present invention in detail.

9 is an operation state diagram of a small camera module according to the present invention.

When no power is applied to the driving unit 130, the lens holder 120 maintains an initial position in contact with an upper surface of the housing 110.

In addition, the leaf spring 150 is horizontally disposed like the housing 110 and the lens holder 120, and elastically supports the lens holder 120 in a downward direction so that the lens holder 120 does not rise arbitrarily. do.

In addition, the magnet 132 is fixed to the cover 140 so as not to be separated in the direction of the lens holder 120 by the magnetic force, is inserted into the insertion groove 111 does not move up, down, left and right.

As such, the insertion groove 111 into which the magnet 132 is inserted is formed on the side of the housing 110, and the cover 140 is formed of a magnetic material to insert the magnet 132 into the insertion groove 111. By fixing the cover 140 to the cover 140, the magnet 132 can be fixed without using an adhesive, thereby improving assembly performance and shortening assembly time.

As shown in FIG. 9, when power is applied to the coil member 131 through the leaf spring 150, the lens holder 120 moves upward.

At this time, the second support part 150b is raised together with the lens holder 120 and the coil member 131, and the elastic part 150c is elastically supported upward and downward while continuing to support the lens holder 120 downward. do.

In addition, the extension part 150d is fixed to the housing 110 together with the first support part 150a and does not move.

As such, the leaf spring 150 performs both a function of elastically supporting the lens holder 120 and a function of a terminal unit electrically connecting the control unit 160 and the coil member 131 to form an overall component number. Reduce, and can be assembled without the need to connect the conventional terminal portion and the leaf spring separately has the effect of improving the assembly.

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

1 is a perspective view showing a conventional small camera module,

2 is an exploded perspective view showing a conventional small camera module,

3 is a perspective view of a small camera module according to the present invention;

4 is an exploded perspective view illustrating a small camera module according to the present invention;

5 is an exploded perspective view showing a leaf spring according to the present invention,

6 is a plan view of a leaf spring according to the present invention,

7 is a cross-sectional view of a small camera module according to the present invention as seen from A-A of FIG.

8 is a cross-sectional view of the small camera module according to the present invention as seen from B-B of FIG.

9 is an operation state diagram of a small camera module according to the present invention.

<Description of the symbols for the main parts of the drawings>

110: housing, 111: insertion groove,

113: seating groove, 120: lens holder,

121: escape groove, 130: drive unit,

131: coil member, 132: magnet,

140: cover, 150: leaf spring,

151: lower insulating layer, 152: first conductor,

153: second conductor, 154: upper insulating layer,

155: first terminal, 156: second terminal,

160: control unit,

Claims (5)

A housing disposed above the image sensor; A lens holder including a lens therein and mounted to be moved up and down in the housing; A driving unit disposed between the housing and the lens holder to vertically move the lens holder when power is applied; A leaf spring mounted to the housing to elastically support the lens holder up and down; A control unit disposed under the housing to adjust power applied to the driving unit; , &Lt; / RTI &gt; The leaf spring is, A lower insulating layer; A first conductor laminated on the lower insulating layer; A second conductor stacked on the lower insulating layer and spaced apart from the first conductor; An upper insulating layer stacked on the first conductor and the second conductor and formed to expose a portion of the first conductor and the second conductor; It is made, including The partially exposed first conductor and the second conductor are connected to the control unit and the driving unit to electrically communicate with the control unit and the driving unit. The method of claim 1, The leaf spring is, A first support mounted to the housing; A second support part mounted to the lens holder; An elastic part elastically connecting between the first support part and the second support part; An extension part extending from the first support part in a lateral direction of the housing; , &Lt; / RTI &gt; The second support portion is a miniature camera module, characterized in that the upper insulating layer and the lower insulating layer are in contact with each other with the first and second conductors spaced apart from each other. The method of claim 2, The second support portion is formed with a first terminal portion that is exposed to the first conductor and a portion of the second conductor and connected to the drive unit, The extension part is a miniature camera module, characterized in that the second terminal portion is connected to the control unit by exposing a portion of the first conductor and the second conductor. The method according to claim 2 or 3, The driving unit includes: A coil member wound up and down in different directions along an outer surface of the lens holder; A magnet disposed adjacent to the coil member and mounted to the housing; , &Lt; / RTI &gt; Small lens module is characterized in that the lens holder is formed with an escape groove through which the disconnection of the coil member is disposed, the escape groove is formed in the position where the elastic portion is disposed. The method according to claim 2 or 3, The camera module, It further comprises a cover that is mounted to surround the housing at the top of the housing, The housing is provided with a seating groove in which the extension is bent downwardly inserted; The extension part is bent in the lateral direction of the housing when assembling the cover small camera module, characterized in that inserted into the seating groove.

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