KR102258860B1 - Voice coil motor, assembly method of voice coil motor, and camera module having the same - Google Patents

Abstract

The voice coil motor of the present invention includes: a base having an opening; a mover disposed on the base and including a bobbin having a lens fixed therein and a coil surrounding an outer surface of the bobbin; a stator disposed on the base and including a magnet facing the coil and a yoke surrounding a rear surface of the magnet; and an upper leaf spring coupled to an upper portion of the bobbin, wherein the upper leaf spring includes a hole exposing a portion of an upper surface of the bobbin, and an adhesive is provided in the hole so that the upper leaf spring and the bobbin are coupled to each other do.

Description

Voice coil motor, assembly method, and camera module having the same {VOICE COIL MOTOR, ASSEMBLY METHOD OF VOICE COIL MOTOR, AND CAMERA MODULE HAVING THE SAME}

The present invention relates to a voice coil motor, an assembly method, and a camera module having the same.

In recent years, various optical devices, for example, a mobile phone with a built-in miniature digital camera, a high-resolution digital camera, and the like have been developed.

In the case of a miniature digital camera applied to a conventional mobile phone, etc., the distance between the image sensor and the lens for controlling the magnification and focus could not be adjusted, but recently, a lens driving device such as a voice coil motor for adjusting the distance between the image sensor and the lens has been introduced. As it was developed, it became possible to adjust the distance between the image sensor and the lens.

In the case of the voice coil motor, the distance between the image sensor and the lens is adjusted by using the attractive and repulsive force according to the electric line of force generated from the coil and the magnetic force line of the magnet facing the coil.

On the other hand, in the case of the voice coil motor, the bobbin in which the lens is accommodated and up-down is elastically supported by the leaf spring, which is electrically connected to the coil to provide current to the coil.

The leaf springs that elastically support the bobbin of the voice motor coil are disposed at the upper and lower ends of the bobbin, respectively. Holes formed in the leaf spring are inserted into bosses formed at the upper and lower ends of the bobbin, and each leaf spring is fixed to the bobbin.

However, in the process of coupling the leaf spring to the bobbin, the hole of the leaf spring is not correctly fitted into the boss of the bobbin because the leaf spring disposed at the upper and lower ends of the bobbin is thin, making handling of the leaf spring difficult and the leaf spring is easily deformed. misalignment occurs frequently. For this reason, there is a problem in that the time it takes to assemble the voice coil motor is increased and productivity is lowered.

The present invention provides a voice coil motor that facilitates alignment and coupling between a bobbin and a leaf spring.

The present invention provides a method of assembling a voice coil motor that facilitates alignment and coupling of a bobbin and a leaf spring.

The present invention provides a camera module including the voice coil motor.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

In one embodiment, the voice coil motor includes a base having an opening; a mover disposed on the base and including a bobbin having a lens fixed therein and a coil surrounding an outer surface of the bobbin; a stator disposed on the base and including a magnet facing the coil and a yoke surrounding a rear surface of the magnet; and an upper leaf spring coupled to an upper portion of the bobbin, wherein the upper leaf spring includes a hole exposing a portion of an upper surface of the bobbin, and an adhesive is provided in the hole so that the upper leaf spring and the bobbin are coupled to each other do.

In the voice coil motor, a bobbin groove in which the adhesive is accommodated is formed in a portion of the upper surface of the bobbin corresponding to the hole.

A plurality of the holes and the bobbin grooves of the voice coil motor are formed on the upper surface of the bobbin to be symmetrical with respect to the center of the bobbin.

The voice coil motor further includes an alignment pin inserted into the bobbin groove to align the upper leaf spring and the bobbin with each other.

A boss coupled to the upper plate spring is formed on the upper surface of the bobbin of the voice coil motor, and the upper plate spring is inserted into the boss.

A planar shape and a planar size of the bobbin groove of the voice coil motor are the same as those of the boss insertion hole.

The bobbin groove of the voice coil motor is any one of a circle, a triangle, a square, and a polygon in a plan view.

The voice coil motor further includes a lower plate spring coupled to a boss formed on a lower surface opposite to the upper surface of the bobbin, a lower alignment groove is formed in the lower surface, and a lower alignment groove is formed in the lower leaf spring and a lower side alignment hole aligned with the lower side alignment groove is formed.

In one embodiment, a method of assembling a voice coil motor includes: providing a bobbin in which a lens is accommodated; disposing a leaf spring having a hole exposing a portion of the upper surface of the bobbin on the upper surface of the bobbin; and providing an adhesive to the hole to couple the leaf spring and the bobbin to each other.

In the step of preparing the bobbin, a bobbin groove in which the adhesive is accommodated is formed in the upper surface of the bobbin in correspondence with the boss and the hole, and a boss insertion hole inserted into the boss is formed in the leaf spring.

Before the step of mutually coupling the leaf spring and the bobbin, the method further includes inserting an alignment pin into the bobbin groove and hole to align the leaf spring and the bobbin.

Before the step of mutually coupling the leaf spring and the bobbin, the method further includes the step of separating the alignment pin from the bobbin groove.

After the step of separating the alignment pin from the bobbin groove, the adhesive is provided in the bobbin groove.

In one embodiment, the camera module includes a base having an opening, a mover including a bobbin disposed on the base and having a lens fixed therein, and a coil surrounding an outer surface of the bobbin, disposed on the base and comprising the coil and a stator including a facing magnet and a yoke surrounding a rear surface of the magnet, and an upper plate spring coupled to an upper portion of the bobbin, wherein the upper plate spring includes a hole exposing a portion of an upper surface of the bobbin; a voice coil motor in which an adhesive is provided in the hole so that the upper leaf spring and the bobbin are coupled to each other; and an image sensor module that converts external light incident through the lens of the voice coil motor into a digital image.

According to the voice coil motor, assembly method, and camera module having the same of the present invention, grooves for alignment are formed in the upper and lower ends of the bobbin of the voice coil motor, and alignment holes are formed in the leaf spring coupled to the bobbin, and then the alignment pin If you align the bobbin and the leaf spring by aligning the alignment hole with the alignment groove using the have an effect

1 is an exploded perspective view showing an exploded voice coil motor according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a bobbin among the movers shown in FIG. 1 .
FIG. 3 is a perspective view illustrating the upper leaf spring shown in FIG. 1 .
4 is a view showing a state in which the upper leaf spring is aligned and coupled to the upper end of the bobbin.
FIG. 5 is a perspective view illustrating the lower leaf spring shown in FIG. 1 .
6 is a cross-sectional view illustrating an alignment pin for aligning and fixing the leaf spring to the bobbin.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms specifically defined in consideration of the configuration and operation of the present invention may vary according to the intention or custom of users or operators. Definitions of these terms should be made based on the content throughout this specification.

1 is an exploded perspective view showing an exploded voice coil motor according to an embodiment of the present invention.

Referring to FIG. 1 , the voice coil motor 900 includes a base 100 , a mover 200 , a stator 300 , and leaf springs 400 and 500 . In addition, the voice coil motor 900 may optionally further include spacers 120 and 600 and a cover 700 .

The base 100 may have, for example, a rectangular frame shape having an opening. Alternatively, the base 100 may have various shapes, such as a cylindrical shape having an opening. In one embodiment of the present invention, the opening may have a circular shape when viewed in a plan view.

The base 100 includes pillars. For example, the pillars are respectively disposed at the four corners of the upper surface of the base 100 having a rectangular frame shape in which an opening is formed. In one embodiment of the present invention, the pillar may have various shapes, such as a triangular pillar, a square pillar, a polygonal pillar, a cylinder, and the like. The pillars formed on the base 100 support the cover 700 to be described later.

The mover 200 is disposed on the base 100 . The mover 200 moves up and down with respect to the base 100 to drive a lens (not shown) up and down with respect to the base 100 .

The mover 200 includes a bobbin 220 and a coil 250 .

FIG. 2 is a perspective view illustrating a bobbin among the movers shown in FIG. 1 .

Referring to FIG. 2 , the bobbin 220 has, for example, a cylindrical shape. The diameter of the bobbin 220 having a cylindrical shape is slightly smaller than the diameter of the opening of the base 100 and is fitted into the opening of the base 100 .

The bobbin 220 serves to fix a lens (not shown), and a spiral-shaped groove for fixing the lens is formed on the inner surface of the bobbin 220, and the lens is connected to the bobbin 220 by the spiral-shaped groove. ) is fixed at a specified position inside the

Bosses 221 and 222 for coupling with the plate springs 120 and 400 to be described later protrude from the lower end facing the base 100 and the upper end facing the lower end of the bobbin 220 . Here, the bosses 222 formed at the upper end of the bobbin 220 protrude from the outer and inner edges of the upper end of the bobbin 220, and the bosses 222a protruding from the outer edge and the boss protruding from the inner edge ( 222b) are alternately arranged at regular intervals. In one embodiment of the present invention, the bosses 221 and 222 formed at the upper end and lower end of the bobbin 220 have a rectangular prism shape.

In addition, upper alignment grooves 224 for easily aligning the leaf spring 400 to the upper end of the bobbin 220 are formed at the upper end of the bobbin 220 . The upper alignment grooves 224 of the bobbin 220 are formed on the upper end of the bobbin 220 to be symmetrical with respect to the center of the bobbin 220 . For example, the upper alignment grooves 224 are formed in portions adjacent to the bosses 222a protruding from the outer edge of the upper end of the bobbin 220 as shown in FIG. 2 .

The upper surface of the bobbin 220 has a width that is the distance between the inner surface of the bobbin 220 and the outer surface of the bobbin 220, and the upper surface of the bobbin 220 has a first portion 227 having a first width; and a second portion 228 having a second width greater than the first width. The bobbin 220 includes an alignment groove 224 concavely formed in the second portion 228 of the upper surface of the bobbin 220 , and an alignment groove 228 in the second portion 228 of the upper surface of the bobbin 220 , and It may include a boss 222a that is spaced apart and protruded. The first portion 227 of the upper surface of the bobbin 220 includes four first portions 227 spaced apart from each other, and the second portion 228 of the upper surface of the bobbin 220 includes four first portions 227 . ) and four second parts 228 disposed between, the alignment groove 224 of the bobbin 220 and the boss 222a of the bobbin 220 are to be formed in each of the four second parts 228 . can

At the lower end of the bobbin 220 , lower alignment grooves 226 for easily aligning the leaf spring 500 may be formed at the lower end of the bobbin 200 . The lower alignment grooves 226 of the bobbin 220 are formed symmetrically with respect to the center of the bobbin 220 on the lower end of the bobbin 220 .

The upper alignment groove 224 and the lower alignment groove 226 according to an embodiment of the present invention may have any one shape among a circle, a triangle, a square, and a polygon when viewed in a plan view.

The coil 250 , which is one of the components of the mover 200 , is wound on the outer surface of the bobbin 220 . Both ends of the coil 250 are electrically connected to a leaf spring 500 to be described later, and a driving signal such as a current is provided to the coil 250 through the leaf spring 500 .

Referring back to FIG. 1 , the stator 300 is coupled to the outside of the mover 200 and disposed around the opening of the base 100 . The stator 300 also serves as a driver to fix the mover 200 and up-down the mover 200 .

The stator 300 includes a yoke 320 and a magnet 350 .

The yoke 320 is disposed around the opening of the base 100 and the yoke 320 may have, for example, a rectangular frame shape.

The magnets 350 are disposed at each corner portion where the inner surfaces of the yoke 320 meet. Since there are all four corners where the inner surfaces of the yoke 320 meet, four magnets 350 are disposed on the yoke 320 .

Among the magnets 350 , the rear surface of the magnet 350 facing the yoke 320 has a shape in close contact with each corner, and the front side of the magnet 350 facing the coil 250 has a curvature of the coil 250 . has the same curvature as

In one embodiment of the present invention, the yoke 320 shields the magnetic field generated from the magnet 350 to prevent the magnetic field from leaking to the outside, and the magnet 350 is, for example, a yoke by an ultraviolet curing adhesive or the like. Attached to the inner surface of the 320.

The leaf springs 400 and 500 are coupled to the upper and lower ends of the bobbin 220 as the mover 200 , respectively, and serve to elastically support the bobbin 220 and the coil 250 . In the present embodiment, the leaf springs 400 and 500 may be manufactured by pressing a metal plate having a thin thickness in order to easily generate displacement even with a small force. The leaf springs 400 and 500 may have a thickness of about 50 μm.

The leaf spring includes an upper leaf spring and a lower leaf spring.

FIG. 3 is a perspective view illustrating the upper leaf spring shown in FIG. 1 , and FIG. 4 is a view showing a state in which the upper leaf spring is aligned and coupled to the upper end of the bobbin.

3 and 4 , the upper leaf spring 400 is coupled to the upper end of the bobbin 220 , and the upper leaf spring 400 is fixed by bosses 222 formed at the upper end of the bobbin 220 . .

The upper leaf spring 400 coupled to the upper end of the bobbin 220 has an opening through which the bobbin 220 and the coil 250 pass. The upper leaf spring 400 includes an inner spring unit 401 disposed at a position corresponding to the upper end of the bobbin 220 , an outer spring unit 403 and an inner spring unit 401 disposed at a position corresponding to the base 100 . ) and a finger portion 402 connecting the outer spring portion 403 . The outer spring portion 403 is disposed on the yoke 320 , and the inner spring portion 401 is coupled to the boss 222 formed at the upper end of the bobbin 220 .

The inner spring portion 401 of the upper leaf spring 400 includes a third portion 430 disposed on the first portion 227 of the bobbin 220 and a second portion 228 disposed on the bobbin 220 . It includes a fourth portion 440 , and the finger portion 402 of the upper leaf spring 400 may be connected to the third portion 430 of the inner spring portion 401 of the upper leaf spring 400 .

Boss receiving grooves 410 are formed in the inner spring part 401 that are inserted into the boss 222 formed at the upper end of the bobbin 220 to fix the upper leaf spring 400 to the upper end of the boss. Since the boss receiving grooves 410 are fitted to the respective bosses 222 , the boss receiving grooves 410 correspond to the bosses 222 on the outer and inner edges of the inner spring part 401 as shown in FIG. 4 . ) are formed. The size of the boss receiving groove 410 is slightly larger than the size of the boss 222 so that the boss receiving groove 410 is fitted into the boss 222 .

In addition, upper alignment holes 420 are formed in the inner spring part 401 to correspond to the upper alignment grooves 224 of the bobbin 220 . A planar shape and a planar size of the upper alignment hole 420 are the same as those of the upper alignment groove 224 . In an embodiment of the present invention, the upper alignment hole 420 may have any one of a circular shape, a triangular shape, a rectangular shape, and a polygonal shape when viewed in a plan view. Therefore, when the boss receiving groove 410 of the upper plate spring 400 is accurately aligned with the boss 222 protruding from the upper end of the bobbin 220, and the upper plate spring 400 is coupled to the upper end of the bobbin 220, As shown in FIG. 4 , the upper alignment holes 410 are precisely positioned in the portion where the upper alignment grooves 224 are formed.

FIG. 5 is a perspective view illustrating the lower leaf spring shown in FIG. 1 .

1 and 5 , the lower leaf spring 500 includes a leaf spring body 510 and a terminal part 540 .

The leaf spring body 510 includes an inner spring portion disposed at a position corresponding to the opening of the base 100, an outer spring portion disposed on the base 100, and a finger portion connecting the inner spring portion and the outer spring portion, The leaf spring body 510 is displaced by the finger part.

In the inner spring part, boss receiving grooves 520 that are inserted into the boss 221 formed at the lower end of the bobbin 220 to fix the lower plate spring 500 to the upper end of the boss 221 are formed in correspondence with the boss 221 . . The size of the boss receiving groove 520 is slightly larger than that of the boss 221 so that the boss receiving groove 520 is fitted into the boss 221 .

In addition, upper alignment holes 420 are formed in the inner spring part 401 to correspond to the upper alignment grooves 224 of the bobbin 220 . A planar shape and a planar size of the upper alignment hole 420 are the same as those of the upper alignment groove 224 . In an embodiment of the present invention, the upper alignment hole 420 may have any one of a circular shape, a triangular shape, a rectangular shape, and a polygonal shape when viewed in a plan view.

The lower plate spring 500 is made of two, and the outer spring part of each of the two lower plate springs 500 is disposed on the base 100, and the inner spring part is combined with the bosses 221 of the bobbin 220. The two lower leaf springs 500 elastically support the bobbin 220 and the coil 250 .

On the other hand, one end of the conductive coil 250 wound around the bobbin 220 is electrically connected to any one of the two lower plate springs 500 and one side of the coil 250 . The other end opposite to the end is electrically connected to the other lower leaf spring 500 among the two lower leaf springs 500 .

In order to apply a driving signal applied from the outside to the coil 250 through the two lower leaf springs 500 , vertically bent terminal parts 540 are disposed on each of the leaf spring bodies 510 .

Referring back to FIG. 1 , the voice coil motor 900 may further include spacers 120 and 600 .

Among the spacers 120 and 600 , the spacer 120 disposed under the bobbin 220 is disposed around the opening of the base 100 , and the spacer 120 includes a magnet 350 fixed to the yoke 320 and a lower plate. It is in contact with the spring 500 to prevent a short circuit.

Among the spacers 120 and 600 , the spacer 600 disposed above the bobbin 220 presses the outer spring part 403 of the upper leaf spring 400 coupled to the upper end of the bobbin 220 to press the upper leaf spring 400 . ) from deviated from the designated position.

The cover 700 includes the spacer 120 accommodated in the base 100, the lower plate spring 500, the bobbin 220, the coil 250, and the yoke 320 to which the magnet 350 is coupled, the upper plate spring ( 400 ) and the spacer 600 may be hook-coupled to the pillar of the base 100 so that they are not separated, and the upper surface of the cover 700 has a through hole so that light can be incident to the lens accommodated in the bobbin 220 . .

The voice coil motor 900 according to an embodiment of the present invention further includes an alignment pin 800 for easily aligning and fixing the leaf springs 400 and 500 to the upper and lower ends of the bobbin 220 .

6 is a cross-sectional view illustrating an alignment pin for aligning and fixing the leaf spring to the bobbin.

6, the alignment pin 800 is for easily and quickly aligning the bobbin 220 and the leaf springs 400 and 500, and the alignment pin 800 is an alignment hole formed in the leaf springs 400 and 500 ( After passing through 420 and 530 , the plate springs 400 and 500 are accurately aligned with the bobbin 220 by being inserted into the alignment grooves 224 and 226 on the upper and lower sides of the bobbin 220 . In this embodiment, the length of the alignment pin 800 is equal to the sum of the thickness of the leaf springs 400 and 500 and the depth of the alignment grooves 224 and 226 formed in the bobbin 220 .

Although not shown, the voice coil motor according to another embodiment of the present invention aligns the bobbin and the leaf spring easily and quickly using an alignment pin, and then fills the plate with an adhesive in the alignment hole and the alignment groove aligned at the same position. Attach the spring to the bobbin.

An image sensor module (not shown) that converts external light incident through the lens of the voice coil motor 500 into a digital image may be disposed under the base 100 of the voice coil motor 700 described above.

A method of assembling a voice coil motor according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6 as follows. For convenience of description, a method of assembling the upper leaf spring to the upper end of the bobbin will be described as an example.

Referring to FIGS. 1 and 2 , first, alignment grooves 224 and 226 are formed to a specified depth at the upper end and lower end of the bobbin 220 in which the lens is accommodated. The alignment grooves 224 and 226 are formed to have any one of a circular shape, a triangular shape, a rectangular shape, and a polygonal shape when viewed in a plan view.

When the alignment grooves 224 and 226 are formed at the upper end and lower end of the bobbin 220 , the coil 250 is wound on the outer surface of the bobbin 220 .

Thereafter, the upper plate spring 400 and the lower plate spring 500 are coupled to the upper and lower ends of the bobbin 220 , respectively. For convenience of description, a method of assembling the bobbin and the leaf spring will be described in detail by taking the upper plate spring coupled to the upper end of the bobbin as an example.

In order to couple the upper leaf spring 400 to the upper end of the bobbin 220 , first, the boss receiving holes 410 of the upper leaf spring 400 are located in the respective bosses 221 and 222 protruding from the upper end of the bobbin 220 . ), the upper plate spring 400 is placed on the upper end of the bobbin 220 so that they are fitted. However, since the thickness of the upper plate spring 400 is thin and difficult to handle, when the boss receiving holes 410 of the upper plate spring are not accurately fitted to the boss 222 of the bobbin 220 and span the boss 222 there are many

So, after placing the upper leaf spring 400 on the upper end of the boss 220 , one end of the alignment pin 800 is inserted into the alignment hole 420 formed in the upper leaf spring 400 , and the alignment pin 800 . to move the upper leaf spring 400 toward the alignment groove 224 of the bobbin 220 by using . Then, as shown in FIG. 4 , the alignment hole 420 of the upper leaf spring 400 is positioned at a position corresponding to the alignment groove 222 of the bobbin 220 while being positioned on the boss 222 of the bobbin 220 . The boss receiving hole 410 of the leaf spring 400 is completely inserted, so that the bobbin 220 and the upper leaf spring 400 are aligned.

When the bobbin 220 and the upper leaf spring 400 are aligned, the alignment pin 800 partially fitted into the alignment hole 420 of the upper leaf spring 400 is aligned with the bobbin 220 as shown in FIG. 6 . The upper leaf spring 400 is fixed to the upper end of the bobbin 220 by inserting it into the groove 224 .

After the upper leaf spring 400 and the bobbin 220 are aligned and coupled, the alignment pin 800 is separated without being inserted into the alignment groove 224 and the alignment hole 420, and then the alignment groove 224 and the alignment The hole 420 may be filled with an adhesive to fix the upper leaf spring 400 to the upper end of the bobbin 220 .

Since the coupling of the bobbin 220 and the lower leaf spring 500 is the same as the coupling of the above-described bobbin 220 and the upper leaf spring 400 , a detailed description thereof will be omitted.

When each leaf spring is coupled to the upper end and lower end of the bobbin, the bobbin 220, the magnet 350, and the yoke to which the spacer 120, the coil 250, and the leaf springs 400 and 500 are coupled to the base 100 320 and the spacer 600 are combined. Thereafter, the voice coil motor 900 according to the present invention is assembled by coupling the cover 700 to the base 100 in order to fix the components coupled to the base 100 .

As described in detail above, when an alignment groove is formed at the upper end and lower end of the bobbin of the voice coil motor and an alignment hole is formed in the leaf spring coupled to the bobbin, and the leaf spring is coupled to the upper end and lower end of the bobbin, the bobbin and the leaf spring can be combined quickly and easily.

Although the embodiments according to the present invention have been described above, these are merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent ranges of embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

100: base 200: mover
300: stator

Claims (20)

a cover including an upper plate and a side plate extending from the upper plate;
a bobbin disposed within the cover;
a coil disposed on the bobbin;
a magnet disposed between the coil and the side plate of the cover and facing the coil; and
It includes an upper elastic member coupled to the upper surface of the bobbin,
The bobbin includes a boss formed on the upper surface of the bobbin, and a groove formed on the upper surface of the bobbin and spaced apart from the boss,
The upper elastic member includes a groove formed at a position corresponding to the boss of the bobbin, and a hole formed at a position corresponding to the groove of the bobbin,
the boss of the bobbin protrudes from the inner edge of the bobbin,
The groove of the upper elastic member is opened inwardly,
The upper elastic member includes an inner spring portion disposed on the bobbin, an outer spring portion disposed outside the inner spring portion, and a finger portion connecting the inner spring portion and the outer spring portion,
A width of a region including the hole of the inner spring part has a maximum width among widths of the inner spring. The method of claim 1,
the upper surface of the bobbin has a width that is the distance between the inner edge of the bobbin and the outer edge of the bobbin;
a width between the outer edge of the bobbin and the boss is greater than a width between the outer edge of the bobbin and the groove on the bobbin. The method of claim 1,
the upper surface of the bobbin has a width that is the distance between the inner edge of the bobbin and the outer edge of the bobbin;
the groove of the bobbin is disposed within the width of the upper surface of the bobbin;
wherein the boss of the bobbin is spaced apart from the outer edge of the bobbin. The method of claim 3,
The upper elastic member includes an inner spring portion disposed on the bobbin, an outer spring portion disposed outside the inner spring portion, and a finger portion connecting the inner spring portion and the outer spring portion,
The inner spring portion of the upper elastic member has a width corresponding to the width of the upper surface of the bobbin voice coil motor. The method of claim 1,
The upper elastic member includes an inner spring portion disposed on the bobbin, an outer spring portion disposed outside the inner spring portion, and a finger portion connecting the inner spring portion and the outer spring portion,
The groove and the hole of the upper elastic member are formed in the inner spring part of the upper elastic member. The method of claim 1,
the upper surface of the bobbin has a width that is the distance between the inner edge of the bobbin and the outer edge of the bobbin;
The upper surface of the bobbin includes a first portion having a first width and a second portion having a second width greater than the first width. The method of claim 1,
The upper elastic member includes an inner spring portion disposed on the bobbin, an outer spring portion disposed outside the inner spring portion, and a finger portion connecting the inner spring portion and the outer spring portion,
A width of a region including the hole of the inner spring portion is greater than a width of another region of the inner spring. The method of claim 1,
The upper surface of the bobbin is a surface that is flush with a surface in contact with a lower surface of the upper elastic member. The method of claim 1,
An adhesive is disposed in the groove of the bobbin and the hole of the upper elastic member. The method of claim 1,
The groove of the upper elastic member is formed to be larger than the size of the boss so that the boss of the bobbin is fitted. The method of claim 1,
The groove of the upper elastic member surrounds three side surfaces of the boss of the bobbin. The method of claim 1,
a base disposed under the bobbin and coupled to the side plate of the cover; and
and a lower elastic member coupled to a lower surface of the bobbin and the base,
The lower elastic member is a voice coil motor electrically connected to the coil. The method of claim 12,
and a spacer disposed between the magnet and the upper plate of the cover,
A portion of the upper elastic member is disposed between the spacer and the base. The method of claim 1,
The upper plate of the cover includes an opening,
The boss of the bobbin and the groove of the bobbin are exposed through the opening of the cover. The method of claim 1,
The grooves of the bobbin include a plurality of grooves,
A distance in a circumferential direction of the bobbin between the plurality of grooves in the bobbin is greater than a distance in a corresponding direction between the boss of the bobbin and the grooves in the bobbin. The voice coil motor of claim 1;
a lens coupled to the bobbin of the voice coil motor; and
A camera module including an image sensor disposed under the lens. a cover including an upper plate and a side plate extending from the upper plate;
a bobbin disposed within the cover;
a coil disposed on the bobbin;
a magnet disposed between the coil and the side plate of the cover and facing the coil; and
It includes an upper elastic member coupled to the upper surface of the bobbin,
The bobbin includes a boss formed on the upper surface of the bobbin, and a groove formed on the upper surface of the bobbin and spaced apart from the boss,
The upper elastic member includes a groove formed at a position corresponding to the boss of the bobbin, and a hole formed at a position corresponding to the groove of the bobbin,
the upper surface of the bobbin has a width that is the distance between the inner edge of the bobbin and the outer edge of the bobbin;
a width between the outer edge of the bobbin and the boss is greater than a width between the outer edge of the bobbin and the groove on the bobbin. The method of claim 17,
the groove of the bobbin is disposed within the width of the upper surface of the bobbin;
wherein the boss of the bobbin is spaced apart from the outer edge of the bobbin. The method of claim 17,
The upper elastic member includes an inner spring portion disposed on the bobbin, an outer spring portion disposed outside the inner spring portion, and a finger portion connecting the inner spring portion and the outer spring portion,
The inner spring portion of the upper elastic member has a width corresponding to the width of the upper surface of the bobbin voice coil motor. The method of claim 17,
The upper elastic member includes an inner spring portion disposed on the bobbin, an outer spring portion disposed outside the inner spring portion, and a finger portion connecting the inner spring portion and the outer spring portion,
A voice coil motor having a boss receiving groove disposed in the inner spring portion to be inserted into the boss disposed on the upper surface of the bobbin to fix the upper elastic member to the upper end of the boss.

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