KR20210021649A - Actuator of vcm type - Google Patents

Abstract

The present invention provides a VCM type actuator, which comprises: a carrier on which a lens is mounted and which moves in the optical axis direction; a driving coil wound around the outer periphery of the carrier; a base supporting the carrier; a magnet unit disposed outside the driving coil; an elastic member connected to the carrier and the base to elastically support the carrier; and one or more ribs which have a shape protruding to the outside of the carrier and to which an end of a driving coil wound on the carrier is connected. According to the present invention, the process itself can be implemented more easily and accurately.

Description

VCM type actuator {ACTUATOR OF VCM TYPE}

The present invention relates to a VCM type actuator, and more particularly, to a VCM type actuator with improved electrical connection structure.

As hardware technology for image processing advances and user needs for image capture increase, as well as independent camera devices, auto focus (AF, Auto Focus), etc., on camera modules mounted on mobile terminals such as mobile phones, smartphones, etc. Functions such as OIS (Optical Image Stabilization) are being implemented.

The auto focus (auto focus control) function allows a carrier equipped with a lens, etc., to move linearly in the direction of the optical axis to adjust the focal length to the subject so that a clear image is generated by an image sensor (CMOS, CCD, etc.) provided at the rear end of the lens. Means function.

As one of the representative methods of implementing the autofocus or OIS function, after installing a magnet (coil) on a moving body (carrier) and installing a coil (magnet) on a fixed body (housing or other type of carrier, etc.), between the coil and the magnet. A method of moving the moving body in the direction of the optical axis or in a direction perpendicular to the optical axis by generating an electromagnetic force is mentioned.

In the case of VCM (Voice Coil Motor) type, a coil is wound around the outer circumference of a carrier on which the lens is mounted, and a magnet is installed on the fixture to face the coil, and the carrier is linear in the optical axis direction by using the magnetic force between the coil and the magnet. It corresponds to the method of controlling to move.

According to the embodiment, a thin plate-shaped metal plate that can function as a spring is provided above and/or below the carrier so that the carrier is elastically supported.

In the case of a VCM type actuator, a structure in which external power is applied to a coil located inside the actuator must be implemented in order to generate a magnetic force of an appropriate size and direction.

In the case of a conventional actuator, a process of manually connecting the start and ends of the coil to the interfacing structure through which external power is supplied after winding the coil on the outer circumferential surface of the carrier was applied. .

However, since this method is basically a human-dependent method, there is a high possibility that electrical defects such as short circuits may occur, as well as the process of electrically connecting the ends of the coils must be performed manually, which takes a long time to perform the process. Of course, it can be said that the process efficiency is extremely reduced because it is difficult to fully automate the process line.

The present invention was invented to solve the above-described problems in the background as described above, and by improving the structure of electrically connecting the ends of the coils, it is possible to induce process automation, as well as the reliability of the electrical connection. Its purpose is to provide a VCM type actuator that can be further improved.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. In addition, the objects and advantages of the present invention can be realized by the configuration shown in the claims and a combination of the configuration.

The VCM type actuator of the present invention for achieving the above object includes a carrier mounted with a lens and moving in an optical axis direction; A driving coil wound around the outer circumferential surface of the carrier; A base supporting the carrier; A magnet part disposed outside the driving coil; An elastic member connected to the carrier and the base to physically elastically support the carrier; And one or more ribs having a shape protruding outward of the carrier and to which an end of a driving coil wound around the carrier is connected.

Here, the elastic member of the present invention includes an upper elastic member disposed on the upper portion of the carrier; And a lower elastic member disposed under the carrier.

Preferably, the lower elastic member of the present invention connects a first plate physically connected to the carrier, a second plate physically connected to the base and electrically connected to an external power source, and the first plate and the second plate In this case, the rib may be provided under the carrier, and the first plate may be configured to include a connection part electrically connected to an end of a driving coil connected to the rib.

In addition, the connection portion of the present invention is preferably configured to have a shape protruding in a direction corresponding to the rib so as to face the rib.

Further, the magnet part of the present invention may be made of a plurality of magnets, and may include a first magnet whose height is smaller with respect to the optical axis direction than other magnets. In this case, the rib and the connection part of the present invention are located under the first magnet. It can be configured to be located.

According to an embodiment, the base of the present invention has a length shorter than that of the first magnet based on a longitudinal direction perpendicular to the optical axis, and the lower portion of the first magnet is physically adjusted so that the upper height of the first magnet is the same as that of other magnets. A guide wall portion supporting it may be provided.

In addition, the magnet part of the present invention may include a second magnet having a mounting space formed at a lower side of the side, and in this case, the rib and the connection part may be configured to be located in the mounting space of the second magnet. I can.

More preferably, the lower elastic member of the present invention may include a first lower elastic member and a second lower elastic member each including the first plate, the second plate and the middle plate, the rib of the present invention A first rib connected to one end of the driving coil; And a second rib provided at a different position from the first rib and connected to the other end of the driving coil. In this case, the first plate of the first lower elastic member is the driving coil connected to the first rib. And a first connection part electrically connected to one end of the second lower elastic member, and the first plate of the second lower elastic member may include a second connection part electrically connected to the other end of the driving coil connected to the second rib.

In addition, the second plate of the first lower elastic member of the present invention includes a first connection terminal exposed to the outside and having a bent shape for electrical connection with an external power source, and a second plate of the second lower elastic member The plate may include a second connection terminal exposed to the outside for electrical connection with an external power source and having a bent shape. In this case, the first and second connection terminals are preferably configured to be exposed in the same direction.

According to a preferred embodiment of the present invention, by implementing a rib structure exposed to the outside and configuring the end of the driving coil to be connected to the rib structure, the process of connecting the end of the driving coil itself can be implemented more easily and accurately. It can provide a good effect.

Further, an interfacing structure for electrical connection can be more effectively implemented through structural improvement in which a connection part structure that is electrically connected to the coil end connected to the rib and faces the rib is implemented in an elastic member that elastically supports the carrier.

In addition, according to the present invention, it is possible to provide an infrastructure structure capable of implementing a bonding process such as soldering performed on an electrical connection portion as well as a connection process of the coil end as an automated process.

The following drawings appended to the present specification illustrate preferred embodiments of the present invention, and serve to more effectively understand the technical spirit of the present invention together with the detailed description of the present invention to be described later. It is limited to matters and should not be interpreted.
1 is an exploded view showing the configuration of a VCM type actuator according to a preferred embodiment of the present invention,
Figure 2 is a view showing the rib structure shown in Figure 1,
3 is a view showing an elastic member according to a preferred embodiment of the present invention,
Figure 4 is a bottom view showing the coupling relationship between the lower elastic member and the carrier of the present invention,
5 is a view showing a rib of the present invention, an end portion of a driving coil connected to the rib, and a connection portion facing the rib;
6 and 7 are diagrams showing a magnet and a configuration related thereto according to exemplary embodiments of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors appropriately explain the concept of terms in order to explain their own invention in the best way. Based on the principle that it can be defined, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all the technical spirit of the present invention, and thus various equivalents that can replace them at the time of application It should be understood that there may be water and variations.

1 is an exploded view showing the configuration of a VCM type actuator (hereinafter referred to as'actuator') 1000 according to a preferred embodiment of the present invention, and FIG. 2 is a rib 1310 structure shown in FIG. It is a diagram showing.

As shown in FIG. 1 and the like, the actuator 1000 of the present invention includes a carrier 1100, a base 1200, a driving coil 1300, a magnet part 1400, one or more elastic members 1510, 1520, and a rib. 1110).

As described above, the actuator 1000 of the present invention is a VCM type actuator, in which a lens (not shown) is mounted in the mounting space 1105, and the driving coil 1300 is mounted on the carrier 1100, which is a moving chain linearly moving in the direction of the optical axis. ) Is provided, and corresponds to a fixed body from a relative viewpoint of the carrier 1100 and a magnet part 1400 may be provided on the side of the base 1200 supporting the carrier 1100.

When power of an appropriate size and direction is applied to the driving coil 1300, a magnetic force is generated between the driving coil 1300 and the magnet unit 1400, and the magnetic force is used to drive the carrier 1100 in the optical axis direction (Z axis direction). It moves linearly. The optical axis direction refers to a direction in which light of a subject is vertically incident on the lens, and refers to a direction corresponding to the Z axis shown in the drawing.

Depending on the embodiment, the actuator 1000 according to the present invention is driven by a hall sensor (not shown) using a hall effect, detecting the position of the carrier 1100, and using a decoded signal system according to the detected position. It goes without saying that a configuration for controlling the size and direction of power applied to the coil 1300 may be included.

As shown in FIG. 1 and the like, a driving coil 1300 for generating magnetic force is provided on the outer periphery of the carrier 1100 in a form of winding, and an outer circumference of the driving coil 1300 surrounds the driving coil 1300. The magnet part 1400 is located in a shape or the like.

The elastic members 1510 and 1520 of the present invention are partially physically connected to the carrier 1100, which is a movable body, and the other part is connected to a physical structure corresponding to a fixed body such as the base 1200 or the base 1200. The carrier 1100 is physically elastically supported while guiding the movement of the (1100).

Depending on the embodiment, the elastic member of the present invention may be implemented with one or more of the upper elastic member 1510 disposed on the carrier 1100 or the lower elastic member 1520 disposed below the carrier 1100.

However, as shown in FIG. 1 and the like, the elastic member is an upper elastic member 1510 so that the elastic support of the carrier 1100 is more flexible and the linear movement of the carrier 1100 in the optical axis direction can be guided more effectively. ) And the lower elastic member 1520 is preferably configured to be included. The detailed configuration of the elastic members 1510 and 1520, in particular, the lower elastic member 1520 will be described later.

The base 1200 of the present invention physically supports the carrier 1100 as described above, and corresponds to a fixed body from a relative viewpoint with the carrier 1100 moving in the optical axis direction.

As shown in FIG. 1 and the like, a case 1700 that can function as a shield can for preventing magnetic field leakage and blocking electromagnetic waves may be coupled to an upper direction of the base 1200.

In order to improve the durability of the actuator 1000 and to more effectively implement physical support for an internal configuration such as the carrier 1100 according to the embodiment, a space is formed inside as shown in FIG. 1 and an appropriate height based on the optical axis direction. It is preferable to configure the spacer 1600 to be further included.

As shown in FIG. 2, the carrier 1100 of the present invention has a shape protruding in an outward direction and includes at least one rib 1110 to which the end of the driving coil 1300 wound around the carrier 1100 is connected. It is desirable to configure.

As will be described later, the rib 1110 of the present invention is preferably formed under the carrier 1100 so that electrical connection with the lower elastic member 1520 is effectively implemented. In addition, so that the end 1310 of the driving coil 1300 can be provided on the rib 1110 in a more easily wound form, so that a neck structure having a narrow center portion as shown in FIG. 2 is included. It is desirable to implement the shape of the rib 1110.

When the rib 1110 is provided in the carrier 1100 on which the driving coil 1300 is wound as described above, in the process of winding the driving coil 1300 on the carrier 1100, the start part of the driving coil 1300 ) And the end part can be connected to the rib 1110 in the form of winding, so that the end of the driving coil 1300 can be connected more accurately and quickly by an automated device or module.

That is, in the case of this invention, after winding the driving coil 1300 around the outer circumference of the carrier 1100 with the end portion of the driving coil 1300 left as much as an appropriate margin length, the operator is left as much as the margin length. Since the conventional process of manually connecting the end of the driving coil 1300 to a structure for other electrical connection can be omitted, process efficiency can be maximized and reliability for electrical connection can be further increased.

Figure 3 is a view showing the elastic members (1510, 1520) according to a preferred embodiment of the present invention, Figure 4 is a bottom view showing the coupling relationship between the lower elastic member (1520) and the carrier (1100) of the present invention to be.

As shown in FIG. 3, the lower elastic member 1520 of the present invention may be divided into a first lower elastic member 1520-1 and a second lower elastic member 1520-2. Since the detailed configuration of the second lower elastic member 1520-2 is the same as the first lower elastic member 1520-1, the first lower elastic member 1520-1 will be described in detail below.

The first lower elastic member 1520-1 may include a first plate 151, a second plate 152 and a leg plate 153. The second lower elastic member 1520-2 may include a first plate 151-2, a second plate 152-2, and a leg plate 153-2.

The first plate 151 is a part that is physically connected to the carrier 1100, as shown in FIG. 4, and at least one first coupling hole that is fitted with the first protrusion 1130 formed on the bottom surface of the carrier 1100, etc. 156 can be formed.

In addition, the first plate 151 includes a first connection part 157 electrically connected to an end 1310 of the driving coil 1300 connected to the rib 1110 of the carrier 1100, and the first connection part ( It is preferable to configure 157 to have a shape protruding in a direction corresponding to the rib 1110 so as to face the rib 1110. The connection portion provided on the first plate 151-2 of the second lower elastic member 1520-2 is referred to as a second connection portion 157-2.

The second plate 152 is a part that is physically connected to the base 1200, and a second coupling hole 155 that is fitted to the coupling protrusion 1201 (see FIG. 2) formed on the base 1200 may be formed. In addition, as shown in the figure, it goes without saying that the second coupling hole 155 may be formed in a plurality so that the physical coupling with the base 1200 is more easily implemented.

In addition, the second plate 152 may include a first connection terminal 154 that is exposed to the outside of the actuator 1000 and implemented in a bent shape for electrical interfacing with an external power source.

The leg plate 153 is a part that interconnects the first plate 151 and the second plate 152 and has a bent shape such as a zigzag shape so that physical support and elastic force can be more effectively provided as shown in the drawing. It is desirable to configure it to be included.

The first plate 151, the second plate 152, and the leg plate 153 are preferably formed integrally, and the lower elastic member 1520 is made of a conductive metal material for power interfacing with an external power source. .

Through such an electrical connection structure, the driving coil 1300 provided inside the actuator 1000 is a first connection part connected to the end 1310 of the driving coil connected to the rib 1110 and the end 1310 of the driving coil ( 157), the body of the first lower elastic member 1520-1 made of a conductive material and the first connection terminal 154 are electrically interfaced with an external power source.

5 is a view showing a rib 1110 of the present invention, an end 1310 of a driving coil 1300 connected to the rib, and connection portions 157 and 157-2 facing the rib 1110.

As described above, the end 1310 of the driving coil 1300 connected to the rib 1110 faces or faces the connection part 157 of the first lower elastic member 1520-1 and is exposed to the outside. Therefore, a process of bonding the connection part 157 and the end 1310 of the driving coil 1300 by a method such as soldering can also be implemented more easily.

As shown in FIG. 5, one end 1310 (for example, a start part) of the driving coil 1300 is connected to the first rib 1110 provided in the carrier 1100, and the other end of the driving coil 1300 The 1320 (eg, end part) may be configured to be connected to the second rib 1110-2 provided at a different position from the first rib 1110.

The first lower elastic member 1520- so that the driving coil 1300 can form a closed circuit with an external power source without a short, and further corresponds to the structure of the first and second ribs 1110 and 1110-2. The first connection portion 157 formed on the first plate 151 of 1) is configured to be electrically connected to one end 1310 of the driving coil 1300 connected to the first rib 1110, and the second rib ( The other end 1320 of the driving coil 1300 connected to 1110-2 is the first plate 151-1 of the second lower elastic member 1520-2 that is physically and electrically independent from the first lower elastic member 1520-1. It is configured to be electrically connected to the second connection part 157-2 formed in 2).

In addition, the second plate 152-1 of the first lower elastic member 1520-1 includes a first connection terminal 154 that is exposed to the outside for electrical connection with an external power source and has a curved shape, The second plate 152-2 of the second lower elastic member 1520-2 has a shape corresponding to the first connection terminal 154, and a second connection terminal 154-2 electrically connected to an external power source. It is configured to include.

Further, as shown in FIG. 3 and the like, the first connection terminal 154 and the first connection terminal 154 and the overall shape of each of the first lower elastic member 1520-1 and the second lower elastic member 1520-2 are bent at a right angle. It is preferable to configure the second connection terminal 154-2 to be exposed in the same direction so that interfacing for electrical connection with an external power source is more easily implemented.

6 and 7 are diagrams showing a magnet unit 1400 and a configuration related thereto according to exemplary embodiments of the present invention.

The magnet unit 1400 of the present invention may be made of a plurality of magnets 1410 and 1420 disposed outside the driving coil 1300, and some of the plurality of magnets are different magnets based on the optical axis (Z axis) direction. A first magnet portion 1420 having a height smaller than that of 1410 may be included.

As described above, the rib 1110 has a shape protruding outward from the carrier 1100, so that the size of the actuator 1000 itself is not increased, the rib 1110 and the connection part 157 of the present invention are It is preferable to configure it to be located under the 1 magnet 1420.

In addition, the base 1200 of the present invention has a length shorter than that of the first magnet 1420 based on a longitudinal direction perpendicular to the optical axis (X-axis direction based on FIG. 6), and the upper height of the first magnet 1420 It is preferable to include a guide wall portion 1210 for physically supporting the lower portion of the first magnet 1420 so that the (Z axis reference) is the same as the other magnets 1410.

In this way, when the first magnet part 1410 is supported by the guide wall part 1210, it is possible to secure a space in which the ribs 1110 and the like are provided without increasing the volume of the actuator 1000 itself. A process of mounting the magnets 1410 and 1420 constituting the magnet unit 1400 and an alignment process of allowing their positions to correspond to each other can be implemented more effectively.

In addition, according to an embodiment, a magnet provided on the same surface as the rib 1110 as shown in FIG. 7 may be implemented as a second magnet 1420 having a mounting space formed at a lower side thereof.

In the above, although the present invention has been described by a limited embodiment and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be described by those of ordinary skill in the art to which the present invention pertains. It goes without saying that various modifications and variations are possible within the equal scope of the claims.

In the description of the present invention described above, modifiers such as first and second are only terms of instrumental concepts used to relatively distinguish constituent elements, so they are used to indicate a specific order, priority, etc. It should be interpreted that it is not a term to be used.

The accompanying drawings for the description of the present invention and examples thereof may be shown in a somewhat exaggerated form in order to emphasize or highlight the technical content according to the present invention, but the contents described above and the items shown in the drawings are described. In consideration of this, it should be interpreted that it is obvious that various types of modifications can be applied at the level of those of ordinary skill in the art.

1000: actuator
1110: carrier 1105: lens mounting space
1110: rib 1130: first protrusion
1200: base 1201: coupling protrusion
1210: guide wall
1300: drive coil 1310: one end of the drive coil
1320: the other end of the drive coil
1400: magnet part
1510: upper elastic member
1520-1: first lower elastic member 1520-2: second lower elastic member
151: first plate 152: second plate
153: leg plate 154: first connection terminal
155: second coupling hole 156: first coupling hole
157: connection
1600: spacer 1700: case

Claims (9)

A carrier on which the lens is mounted and moving in the optical axis direction;
A driving coil wound around the outer circumference of the carrier;
A base supporting the carrier;
A magnet part disposed outside the driving coil;
An elastic member connected to the carrier and the base to physically elastically support the carrier; And
A VCM type actuator comprising at least one rib having a shape protruding outward of the carrier and to which an end of a driving coil wound around the carrier is connected. The method of claim 1, wherein the elastic member,
An upper elastic member disposed on the carrier; And
VCM type actuator comprising a lower elastic member disposed under the carrier. The method of claim 2, wherein the lower elastic member,
A first plate physically connected to the carrier, a second plate physically connected to the base and electrically connected to an external power source, and a leg plate connecting the first plate and the second plate,
The rib is provided under the carrier,
The first plate,
A VCM type actuator comprising a connection part electrically connected to an end of the driving coil connected to the rib. The method of claim 3, wherein the connection part,
VCM type actuator, characterized in that it has a shape protruding in a direction corresponding to the rib so as to face the rib. The method of claim 3, wherein the magnet part,
Consisting of a plurality of magnets, including a first magnet having a smaller height relative to the optical axis direction than other magnets,
VCM type actuator, characterized in that the rib and the connection portion is located under the first magnet. The method of claim 5, wherein the base,
It has a length shorter than that of the first magnet based on a longitudinal direction perpendicular to the optical axis, and a guide wall part for physically supporting a lower portion of the first magnet is provided so that the upper height of the first magnet is the same as that of other magnets. VCM type actuator. The method of claim 3, wherein the magnet part,
Consisting of a plurality of magnets, including a second magnet with a mounting space formed in the lower side,
The rib and the connection part are VCM type actuators, characterized in that located in the mounting space of the second magnet. The method of claim 3, wherein the lower elastic member,
Including a first lower elastic member and a second lower elastic member each including the first plate, the second plate and the middle plate,
The rib,
A first rib connected to one end of the driving coil; And
And a second rib provided at a different position from the first rib and connected to the other end of the driving coil,
The first plate of the first lower elastic member includes a first connection part electrically connected to one end of the driving coil connected to the first rib,
The first plate of the second lower elastic member includes a second connection part electrically connected to the other end of the driving coil connected to the second rib. The method of claim 8, wherein the second plate of the first lower elastic member,
It includes a first connection terminal exposed to the outside for electrical connection with an external power source and having a bent shape,
The second plate of the second lower elastic member includes a second connection terminal exposed to the outside for electrical connection with an external power source and having a bent shape,
The VCM type actuator, wherein the first and second connection terminals are exposed in the same direction.

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