TWI624135B - Electromagnetic driving module and lens driving device using the same - Google Patents

Electromagnetic driving module and lens driving device using the same

Info

Publication number
TWI624135B
TWI624135B TW105136582A TW105136582A TWI624135B TW I624135 B TWI624135 B TW I624135B TW 105136582 A TW105136582 A TW 105136582A TW 105136582 A TW105136582 A TW 105136582A TW I624135 B TWI624135 B TW I624135B
Authority
TW
Taiwan
Prior art keywords
portion
movable portion
electromagnetic
coil substrate
opening
Prior art date
Application number
TW105136582A
Other languages
Chinese (zh)
Other versions
TW201729520A (en
Inventor
游証凱
胡朝彰
Original Assignee
台灣東電化股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US201662291311P priority Critical
Priority to US62/291,311 priority
Application filed by 台灣東電化股份有限公司 filed Critical 台灣東電化股份有限公司
Priority claimed from CN201611066776.9A external-priority patent/CN107040111B/en
Publication of TW201729520A publication Critical patent/TW201729520A/en
Application granted granted Critical
Publication of TWI624135B publication Critical patent/TWI624135B/en

Links

Abstract

The present disclosure provides an electromagnetic drive module including: a movable portion, a fixed portion, and an electromagnetic assembly. The fixed portion and the movable portion are disposed along a main axis. The fixing portion has a surface facing the movable portion. The electromagnetic component is configured to drive the movement of the movable portion relative to the fixed portion by magnetic force. The portion of the movable portion closer to the main axis than the fixed portion overlaps the plane on which the surface is located, as viewed in the direction perpendicular to the main axis, in a range in which at least a portion of the movable portion moves relative to the fixed portion.

Description

Electromagnetic drive module and lens driving device using the same

The present disclosure relates to a driving module and a lens driving device using the same, and particularly relates to an electromagnetic driving module that generates mechanical energy by using an electromagnetic effect and a lens driving device using the electromagnetic driving module.

Electronic products are typically equipped with a drive module that drives a component to move over a distance. For example, a camera module is generally provided with a driving module configured to drive one or more lens assemblies to move along the optical axis of a vertical lens to achieve anti-shake function.

However, conventional drive modules use high cost precision drive components as a source of power for the drive components (eg, stepper motors, ultrasonic motors, piezoelectric actuators, etc.) and a significant number of transmission components. Not only the mechanical structure is complicated, but also has the disadvantages of cumbersome assembly steps, large volume, high cost, and large power consumption, so that the price cannot be lowered.

On the other hand, in the above-described driving module, when an external force collision or an excessive movement of the movable member occurs, the movable portion collides with the fixed portion, and the element is damaged. Currently known drive modules are usually increased by The spacing between the moving part and the fixed part to avoid collision between the two, however, this solution does not meet the design trend of reducing the thickness of the driving module.

In view of the above, an object of the present disclosure is to provide an electromagnetic driving module having a lower thickness of an electromagnetic driving module and preventing or avoiding collision between the movable portion and the fixed portion.

According to some embodiments of the present disclosure, the electromagnetic driving module includes a movable portion, a fixed portion, and an electromagnetic component. The fixed portion and the movable portion are disposed along a main axis. The fixing portion has a surface facing the movable portion. The electromagnetic component is configured to drive the movement of the movable portion relative to the fixed portion by magnetic force. In a portion of the portion where the movable portion moves relative to the fixed portion, the portion of the movable portion that is closer to the main shaft than the fixed portion overlaps the plane on which the surface is viewed as viewed in the direction of the vertical main axis.

In the above embodiment, the fixing portion includes a coil substrate which is viewed from a direction perpendicular to the main axis, and a portion of the movable portion overlaps with a plane on which an upper surface of the coil substrate is located. Additionally, the movable portion includes a magnetic element and the electromagnetic assembly includes an OIS drive coil. The OIS drive coil is disposed above the coil substrate and faces the magnetic element.

In the above embodiment, the coil substrate is penetrated by an opening, and a plurality of recessed holes are formed at the edge of the opening of the coil substrate, and a portion of the movable portion is located in the recessed hole.

In the above embodiment, the fixing portion includes a base through which the base and the coil substrate are respectively penetrated, wherein the width of the opening of the base is smaller than the width of the opening of the coil substrate, and the portion of the movable portion is located above the base.

In the above embodiment, the fixing portion includes a circuit board that connects the coil substrate and is away from the movable portion from the coil substrate, wherein the portion of the movable portion overlaps with the plane of an upper surface of the circuit board as viewed from the direction of the vertical main axis.

In the above embodiment, the circuit board is penetrated by an opening, and the circuit board includes an electrical connection hole formed on the edge of the opening and covered by the coil substrate, wherein a conductive material is disposed on the electrical connection hole to electrically connect Circuit board to coil substrate.

In the above embodiment, the fixing portion includes a base, an opening penetrating the base, wherein a flange protrudes from the edge of the opening toward the movable portion, and a plurality of grooves are formed on the flange, and a portion of the movable portion is located in the groove Inside.

In the above embodiment, the electromagnetic driving module further includes a lower elastic member, and the lower elastic member fixes the lower surface of the movable portion by a connecting material, wherein the connecting material is viewed from the direction of the vertical main axis when the carrier is closest to the fixed portion. The position overlaps the plane in which the surface of the fixed portion lies.

In the above embodiment, the electromagnetic assembly includes a focus drive coil and a magnetic element. The focus drive coil and the magnetic element are both disposed on the movable portion, and the magnetic element is disposed facing the focus drive coil. Viewed from the direction of the vertical main axis, the portion of the magnetic element overlaps the plane in which the surface of the fixed portion lies in all the movement ranges in which the movable portion moves relative to the fixed portion.

Another object of the present disclosure is to provide a lens driving device using the electromagnetic driving module according to any of the above embodiments. The lens driving device further includes a lens assembly. The lens assembly is disposed on the movable portion, and the optical axis of the lens assembly is overlapped with the main shaft.

1, 1a‧‧‧ lens drive

2, 2a‧‧‧ electromagnetic drive module

3, 3a‧‧‧ lens components

10, 10a‧‧‧ fixed department

11, 11a‧‧‧ shell structure

111, 111a‧‧‧ upper shell

112, 112a‧‧‧ side shell parts

12, 12a‧‧‧ base

122a‧‧‧Flange

124a‧‧‧ Groove

13‧‧‧Positioning column

14, 14a‧‧‧ circuit board

141a‧‧‧Electrical access

143a‧‧‧ recessed hole

161a‧‧‧ recessed hole

16, 16a‧‧‧ coil substrate

33, 33a‧‧‧OIS drive coil

34, 34a‧‧‧OIS drive coil

18, 18a‧‧‧ movable department

20, 20a‧‧‧ framework

201, 201a‧‧‧ side frame

203, 203a‧‧‧ grooves

205a‧‧‧ accommodating slots

22, 22a‧‧‧elastic components (first elastic component)

25, 25a‧‧‧elastic components (second elastic component)

26, 26a‧‧‧ Linked materials

27, 27a‧‧‧ carried

271, 271a‧‧ channels

28, 28a‧‧‧ electromagnetic components

29, 29a‧‧ ‧ focus drive coil

30‧‧‧Magnetic components (focus magnetic components)

30a‧‧‧Magnetic components

32, 32a‧‧‧ magnetic components (OIS magnetic components)

34, 34a‧‧‧ Magnetic components (OIS magnetic components)

O1, O2, O3, O4, O5, O6‧‧‧ openings

P2, P3‧‧ plane

1 is a structural exploded view of an electromagnetic drive module of some embodiments of the present disclosure.

2 is a cross-sectional view showing an electromagnetic drive module of some embodiments of the present disclosure.

Figure 3 is a cross-sectional view showing an electromagnetic drive module of a portion of the embodiment of the present disclosure, wherein the movable portion is adjacent to the fixed portion.

4 is a structural exploded view of an electromagnetic drive module of some embodiments of the present disclosure.

FIG. 5 is a structural exploded view showing a part of components of the electromagnetic drive module of some embodiments of the present disclosure.

Figure 6 is a cross-sectional view showing an electromagnetic drive module of some embodiments of the present disclosure.

Figure 7 is a cross-sectional view showing an electromagnetic drive module of a portion of the embodiment of the present disclosure, wherein the movable portion is adjacent to the fixed portion.

In the following, a number of specific preferred embodiments will be described in detail with reference to the accompanying drawings, which illustrate several embodiments. However, the present disclosure can be implemented in many different forms, and is not limited to the embodiments described below, and the embodiments provided herein may be made to provide a more thorough and complete disclosure of the scope of the disclosure. By.

It is to be understood that the elements specifically described or illustrated may be in various forms well known to those skilled in the art. In addition, when a layer is "on" another layer or substrate It may be referred to as being "directly" on another layer or substrate, or by referring to a layer on another layer or substrate, or by interposing other layers between other layers or substrates.

In addition, relative terms such as "lower" or "bottom" and "higher" or "top" may be used in the embodiments to describe the relative relationship of one element to another. It will be understood that if the illustrated device is flipped upside down, the component described on the "lower" side will be the component on the "higher" side.

Here, the terms "about" and "about" are usually expressed within 20% of a given value or range, preferably within 10%, and more preferably within 5%. The quantity given here is an approximate quantity, meaning that the meaning of "about" or "about" may be implied without specific explanation.

Fig. 1 shows an exploded view of a lens driving device 1 of a part of the embodiment of the present disclosure. The lens driving device 1 includes an electromagnetic driving module 2 and a lens assembly 3. The electromagnetic drive module 2 is configured to carry the lens assembly 3 and control the displacement of the lens assembly 3. In some embodiments, the electromagnetic drive module 2 includes a fixing portion 10, a housing structure 11, a movable portion 18, and two elastic components, such as a first elastic component 22 and a second elastic component 25. The components of the electromagnetic drive module 2 can be increased or decreased as needed, and are not limited to this embodiment.

The housing structure 11 includes an upper housing member 111 and a side housing member 112. The upper casing member 111 is rectangular, and the side casing member 112 extends from the edge of the upper casing member 111 toward the base 12. The fixing portion 10 includes a base 12, four positioning posts 13, a circuit board 14 and a coil substrate 16. The shape of the base 12 corresponds to the shape of the upper case member 111 and is coupled to the side case member 112 of the case structure 11. A circular opening O1 extends through the base 12, wherein the center of the opening O1 passes through the main axis M. The four positioning posts 13 are respectively disposed at the four corners of the base 12 for the movable portion 18 to be coupled.

The circuit board 14 is disposed on the base 12 and is configured to electrically connect a control module (not shown) and internal electronic components of the electromagnetic drive module 2. A substantially rectangular opening O2 extends through the circuit board 14, wherein the center of the opening O2 passes through the main axis M. The coil substrate 16 is disposed on the circuit board 14 and electrically connected to the circuit board 14 . A substantially rectangular opening O3 extends through the substantial center of the coil substrate 16, wherein the center of the opening O3 passes through the major axis M. In some embodiments, as shown in FIG. 2, the width of the opening O1 is smaller than the width of the opening O2, and the width of the opening O3 is smaller than the width of the opening O2.

In some embodiments, the base 12, the circuit board 14, and the coil substrate 16 are integrally formed. For example, the base 12, the circuit board 14, and the coil substrate 16 are made by a method of manufacturing a fixing portion as disclosed in Chinese Patent Application No. 10413893.

With continued reference to FIG. 1, the movable portion 18 is configured to carry the lens assembly 3. In some embodiments, the movable portion 18 includes a frame 20 and a carrier 27. The components of the movable portion 18 can be increased or decreased as needed, and are not limited to this embodiment.

In some embodiments, the frame 20 includes four side frames 201 that are coupled to each other and disposed about the main axis M. The upper surface and/or the lower surface of the four side frames 201 may be A positioning post is included to facilitate positioning of the resilient member 22 and/or the lower resilient member 25. In addition, the frame 20 further includes four accommodating grooves 203, and each of the accommodating grooves 203 is formed at a position where two adjacent side frames 201 are coupled.

The carrier 27 is surrounded by the frame 20. A passage 271 extends through the carrier 27 along the main axis M, and the lens assembly 3 is disposed in the passage 271. The upper surface and/or the lower surface of the carrier 27 may include a plurality of positioning posts to facilitate positioning of the first resilient component 22 and/or the second resilient component 25.

The first elastic component 22 is coupled to one side of the carrier 27 near the upper casing member 111 and extends in a plane perpendicular to the main axis M. The second elastic member 25 is coupled to one side of the carrier 27 near the fixed portion 10. The first elastic component 22 can be the same or different from the second elastic component 25. Moreover, the positions at which the first elastic component 22 and the second elastic component 25 are disposed may be interchanged.

In some embodiments, as shown in FIG. 2, the first elastic component 22 and the second elastic component 25 are fixed to the carrier 27 and the frame 20 through the connecting material 26 of the movable portion 18. The joining material 26 can be glue. Alternatively, the joining material 26 is a connecting post originally formed on the carrier 27 or the frame 20. In some embodiments, the distance between the joining material 26 and the main axis M is less than the distance between any of the elements of the fixed portion 10 and the major axis M. That is, the joining material 26 is closer to the main axis M than the fixing portion 10. Next, the positioning post is heated to deform, thereby fixing the first elastic component 22 and the second elastic component 25 above the carrier 27 and the frame 20.

Referring to Figure 1, the movable portion 18 further includes an electromagnetic component 28 configured for The movement of the carrier 27 relative to the fixed portion 10 is driven by magnetic force. In some embodiments, the electromagnetic component 28 includes a focus drive coil 29, a plurality of magnetic components for adjusting the focal length, such as: four focus magnetic elements 30, a plurality of magnetic elements for stabilizing the image, for example: four OIS The optical element 32 and a plurality of OIS driving coils, for example, two OIS driving coils 33 and two OIS driving coils 34.

The focus drive coil 29 is disposed on the outer surface of the carrier 27 and electrically connected to the circuit board 14 . The OIS drive coils 33 and 34 are disposed on the coil substrate 16 and are electrically connected to the circuit board 14 through the internal wiring of the coil substrate 16. In some embodiments, as shown in FIG. 1, the two OIS drive coils 33 are respectively disposed adjacent to the base 12 on opposite sides in the X direction. In addition, the two OIS drive coils 34 are respectively disposed adjacent to the base 12 on opposite sides in the Y direction.

The four focus magnetic elements 30 are respectively disposed in the four accommodating grooves 203, and the four OIS magnetic elements 32 are respectively disposed on the bottom surfaces of the four side frames 201. Positioned by the frame 20, four focus magnetic elements 30 are disposed corresponding to the focus drive coil 29, and four OIS magnetic elements 32 are disposed corresponding to the OIS drive coils 33, 34.

In some embodiments, as shown in FIG. 2, the portion of the focusing magnetic element 30 near the bottom surface is located in the opening O3 but does not enter the opening O2. When viewed from the direction of the vertical spindle M, the portion of the focusing magnetic member 30 close to the bottom surface overlaps with the plane P3 where the upper surface of the coil substrate 16 is located. That is, the focusing magnetic element 30 is passed through the plane P3. The bottom surface of the focusing magnetic element 30 faces the upper surface of the base 12 and is separated from the base 12 by a Spacing, no contact.

It should be understood that the position at which the focusing magnetic member 30 is disposed is not limited to the above embodiment. In some embodiments, the portion of the focusing magnetic element 30 that is near the bottom surface is located between the opening O3 and the opening O2. As seen from the direction of the vertical spindle M, the portion of the focusing magnetic member 30 close to the bottom surface overlaps with the plane P3 where the upper surface of the coil substrate 16 is located and the plane P2 where the upper surface of the circuit board 14 is located. That is, the focusing magnetic element 30 is disposed through the plane P3 and the plane P2.

The four focus magnetic elements 30 may each be a magnet, wherein one pole (eg, N pole) of the magnet faces the focus drive coil 29. The four OIS magnetic elements 32 can each be a magnet, wherein one pole (eg, N pole) of the magnet faces the OIS drive coils 33, 34. The four focus magnetic elements 30 and the four OIS magnetic elements 32 can be disposed over the frame 20 by any suitable means (e.g., gluing).

Referring to FIGS. 1 and 2, in this embodiment, the focus drive coil 29 and the four focus magnetic elements 30 together constitute a "zoom drive assembly" for driving the movement of the carrier 27 relative to the frame 20. Further, the OIS drive coils 33 and 34 and the four OIS magnetic elements 32 constitute an "OIS drive unit" for driving the movement of the frame 20 and the carrier 27 with respect to the fixed portion 10.

When the electromagnetic drive module 2 is actuated, a control module (not shown) provides drive current to the OIS drive coils 33, 34. Then, the position of the frame 20 and the carrier 27 can be moved in the direction of the vertical main axis M with respect to the fixed portion 10 by the magnetic force of the "OIS drive unit", and the optical axis of the lens unit 3 is superposed on the position of the main axis M.

On the other hand, when the focus position of the lens unit 3 is to be changed, a control module (not shown) supplies a drive current to the focus drive coil 29. Then, the position of the carrier 27 can be moved on the main spindle M with respect to the fixed portion 10 by the magnetic force of the "zoom drive unit". It is to be noted that since the portion of the focusing magnetic member 30 close to the bottom surface overlaps with the plane P3 where the upper surface of the coil substrate 16 is located, the thickness of the lens driving device 1 is advantageously reduced. On the other hand, in the case where the lens driving device 1 maintains the same thickness, the focusing magnetic member 30 can have a larger height than the conventional focusing magnetic member. Therefore, the stroke in which the carrier 27 is movable relative to the fixed portion 10 is increased. The electromagnetic drive module 2 can be applied to a variety of lens assemblies 3.

In some embodiments, as viewed from the direction of the vertical main axis M, when the carrier 27 moves toward the fixed portion 10, the portion of the movable portion 18 overlaps with the plane P3 where the upper surface of the coil substrate 16 is located. For example, as shown in FIG. 3, when the carrier 27 is driven by the "zoom drive unit" to approach the fixed portion 10, or when the carrier 27 approaches the fixed portion 10 due to an external force impact, the joining material 26 is The plane P3 where the upper surface of the coil substrate 16 is placed overlaps. That is, the joining material 26 is laid through the plane P3. In some embodiments, the joining material 26 is located between the opening O3 and the opening O2. Alternatively, the joining material 26 is located in the opening O3 but does not enter the opening O2. With the above configuration, it is possible to prevent the joining material 26 from striking the fixing portion 10, so that particles are not generated, causing contamination inside the lens driving device 1. On the other hand, since the joining material 26 is not damaged by the collision, the stability of the lens driving device 1 can be increased.

In some embodiments, during the operation of the electromagnetic driving module 2, one or more sensing components (not shown) can continuously sense the focusing magnetic component 30. And/or the magnetic field of the OIS magnetic element 32 changes, and returns the movable portion 18 and/or the position of the carrier 27 relative to the fixed portion 10 to the control module for calculation (not shown) to form a closed loop control (closed-loop control) ).

Fig. 4 is a view showing an exploded view of the lens driving device 1a of a part of the embodiment of the present disclosure. The lens driving device 1a includes an electromagnetic driving module 2a and a lens assembly 3a. The electromagnetic drive module 2a is configured to carry the lens assembly 3a and control the displacement of the lens assembly 3a. In some embodiments, the electromagnetic drive module 2a includes a fixing portion 10a, a housing structure 11a, a movable portion 18a, a first elastic assembly 22a, and a second elastic assembly 25a. The components of the electromagnetic drive module 2a can be increased or decreased as needed, and are not limited to this embodiment.

The housing structure 11a includes an upper housing member 111a and a side housing member 112a. The upper case member 111a has a rectangular shape, and the side case member 112a extends from the edge of the upper case member 111a toward the base 12a. The fixing portion 10a includes a base 12a, a circuit board 14a, and a coil substrate 16a. The shape of the base 12a corresponds to the shape of the upper case member 111a and is coupled to the side case member 112a of the case structure 11a. A circular opening O4 extends through the base 12a, wherein the center of the opening O4 passes through the main axis M. A flange 122a protrudes from the edge of the opening O4 toward the movable portion 18a.

The circuit board 14a is disposed on the base 12a and is configured to electrically connect internal components of a control module (not shown) and the electromagnetic drive module 2a. A substantially circular opening O5 extends through the circuit board 14a, wherein the center of the opening O5 passes through the main axis M. The coil substrate 16a is disposed on the circuit board 14a and electrically connected to the circuit board 14a. a substantially circular opening O6 penetrating the substantial center of the coil substrate 16a, The center of the middle opening O6 passes through the main axis M.

Fig. 5 shows an exploded view of the fixed portion 10a. In some embodiments, the width of the opening O5 of the circuit board 14a is greater than the width of the opening O6 of the coil substrate 16a. A plurality of electrical vias 141a are formed at the edges of the opening O5. After the circuit board 14a is coupled to the coil substrate 16a, the electrical contact hole 141a is covered by the lower surface of the coil substrate 16a. Moreover, the electrical contact holes 141a correspond to electrical contacts (not shown) on the coil substrate 16a. The electrical contact 141a is electrically connected to the electrical contact on the coil substrate 16a through a conductive material (for example, a conductive paste, not shown).

In addition, a plurality of recessed holes 161a are formed at the edges of the opening O6. Further, a plurality of recessed holes 143a are formed at the edge of the opening O5 and communicate with the recessed holes 161a. The recessed holes 161a and the recessed holes 143a may have corresponding numbers and sizes, but the disclosure is not limited thereto. The number of the recessed holes 143a may be smaller than the number of the recessed holes 161a. Alternatively, the provision of the recessed holes 143a is omitted. In some embodiments, the width of the opening O6 of the coil substrate 16a is greater than the width of the opening O4 of the base 12. The flange 122a of the base 12a is disposed in the opening O5 and the opening O6. In some embodiments, the base 12a includes a plurality of recesses 124a that communicate with the recessed holes 161a and/or the recessed holes 143a.

With continued reference to FIG. 4, the movable portion 18a is configured to carry the lens assembly 3. In some embodiments, the movable portion 18a includes a frame 20a and a carrier 27a. The components of the movable portion 18a can be increased or decreased as needed, and are not limited to this embodiment.

The frame 20a includes four side frames 201a which are sequentially connected around the main axis M. Each of the side frames 201a defines a receiving groove 205a for accommodating the magnetic member 30a. Four side frames The upper surface and/or the lower surface of 201a may each include a locating post to facilitate positioning of the first resilient component 22a and/or the second resilient component 25a.

The carrier 27a is surrounded by the frame 20a. A passage 271a extends through the carrier 27a along the main axis M, and the lens unit 3 is disposed in the above-mentioned passage 271a. The upper surface and/or the lower surface of the carrier 27a may include a plurality of positioning posts to facilitate positioning of the first resilient component 22a and/or the second resilient component 25a.

The first elastic member 22a is coupled to the carrier 27a on a side close to the upper casing member 111a and extends in a plane perpendicular to the main axis M. The second elastic member 25a is coupled to one side of the carrier 27a near the fixed portion 10a. The first elastic component 22a may be the same or different from the second elastic component 25a. Also, the positions at which the first elastic member 22a and the second elastic member 25a are disposed may be interchanged.

In some embodiments, as shown in Fig. 6, the first elastic member 22a and the second elastic member 25a are fixed to the carrier 27a and the frame 20a via a connecting material 26a of the movable portion 18a. The joining material 26a can be glue. Alternatively, the joining material 26a is a connecting post originally formed on the carrier 27a or the frame 20a. Next, the positioning post is heated to deform, thereby fixing the first elastic component 22a and the second elastic component 25a over the carrier 27a and the frame 20a.

Referring to Fig. 4, the movable portion 18a further includes an electromagnetic unit 28a configured to drive the movement of the carrier 27a relative to the fixed portion 10a by magnetic force. In some embodiments, the electromagnetic component 28a includes a focus drive coil 29a, a plurality of magnetic components 30a, and a plurality of OIS drive coils, for example, two OIS drive coils 33a and two OIS drives. The coil 34a.

The focus drive coil 29a is disposed on the outer surface of the carrier 27a and electrically connected to the circuit board 14a. The OIS drive coils 33a and 34a are provided on the coil substrate 16a, and are electrically connected to the circuit board 14a via the internal wiring of the coil substrate 16a. In some embodiments, as shown in Fig. 4, the two OIS drive coils 33a are respectively disposed adjacent to the base 12a on opposite sides in the X direction. Further, the two OIS drive coils 34a are respectively disposed adjacent to the base 12a on opposite sides in the Y direction.

Referring to Figures 4 and 6, the four magnetic elements 30a are respectively disposed in the accommodating grooves 205a of the four side frames 201a. Positioned by the frame 20a, four magnetic elements 30a are provided corresponding to the focus drive coil 29a and the OIS drive coils 33a, 34a. The four magnetic elements 30a can be disposed over the frame 20a by any suitable means (e.g., gluing).

When the electromagnetic drive module 2a is actuated, a control module (not shown) supplies drive current to the OIS drive coils 33a, 34a. Then, the position of the frame 20a and the carrier 27a can be moved by the magnetic force of the magnetic element 30a and the OIS driving coils 33a, 34a to move in the direction of the vertical main axis M with respect to the fixed portion 10, and the optical axis of the lens assembly 3 is overlapped with the main axis. The location of M.

When the focus position of the lens unit 3a is to be changed, a control module (not shown) supplies a drive current to the focus drive coil 29a. Then, the position of the carrier 27a can be moved on the main spindle M with respect to the fixed portion 10a by the magnetic force of the magnetic element 30a and the focus drive coil 29a.

In some embodiments, as viewed from the direction of the vertical main axis M, when the carrier 27a moves toward the fixed portion 10a, the portion of the movable portion 18a overlaps with the plane P3 where the upper surface of the coil substrate 16a is located. For example, as shown in FIG. 7, when viewed from the direction of the vertical main axis M, when the carrier 27a is driven by the magnetic force to approach the fixed portion 10a, or when the carrier 27a is brought close to the fixed portion 10a due to an external force impact, the connection is made. The material 26a overlaps with the plane P3 where the upper surface of the coil substrate 16a is located. That is, the joining material 26a is passed through the plane P3. In some embodiments, the joining material 26a is located within the recess 161a. That is, the portion of the movable portion 18a overlaps the recessed hole 161a as viewed in the direction of the vertical spindle M. In the embodiment in which the recessed hole 161a communicates with the recess 124a and/or the recessed hole 143a, the joining material 26a is simultaneously located in the recessed hole 161a, the recessed 124a, and/or the recessed hole 143a. With the above configuration, particles generated by the bonding material 26a striking the fixed portion 10a can be avoided. On the other hand, since the joining material 26a is not broken by the collision, the stability of the lens driving device 1a can be increased.

The present disclosure has been disclosed in the preferred embodiments, and is not intended to limit the scope of the disclosure. It is to be understood that the present invention can be modified in various ways without departing from the spirit and scope of the disclosure. And the scope of protection of this disclosure is subject to the definition of the scope of the appended patent application.

Claims (10)

  1. An electromagnetic driving module includes: a movable portion including a carrier and an electromagnetic component; a fixing portion disposed along a main axis of the movable portion and having a surface facing the movable portion, wherein the electromagnetic component is Configuring to move the movement of the carrier relative to the fixed portion by magnetic force; wherein, in a portion of the portion of the movable portion that moves relative to the fixed portion, the movable portion is closer to the main shaft than the fixed portion when viewed from a direction perpendicular to the main shaft The portion overlaps the plane in which the surface lies.
  2. The electromagnetic drive module of claim 1, wherein the fixing portion comprises a coil substrate, and a portion of the movable portion overlaps a plane of an upper surface of the coil substrate when viewed from a direction perpendicular to the main shaft; And the electromagnetic component includes a magnetic component and an OIS driving coil disposed on the coil substrate and facing the magnetic component.
  3. The electromagnetic drive module of claim 2, wherein the coil substrate is penetrated by an opening, and a plurality of recessed holes are formed at an edge of the opening of the coil substrate, wherein the movable portion is opposite to the fixed portion In the partial range in which the portion moves, the portion of the movable portion overlaps the concave hole as viewed in the direction perpendicular to the main axis.
  4. The electromagnetic drive module of claim 2, wherein the fixing portion comprises a base, the base and the coil substrate are respectively penetrated by an opening, wherein a width of the opening of the base is smaller than that of the coil substrate The width of the opening, and the portion of the movable portion is located above the base.
  5. The electromagnetic drive module of claim 2, wherein the fixing portion comprises a circuit board that connects the coil substrate and is away from the movable portion from the coil substrate, wherein the direction from the vertical axis is observed. A portion of the movable portion overlaps with a plane on which an upper surface of the circuit board lies.
  6. The electromagnetic drive module of claim 5, wherein the circuit board is penetrated by an opening, and the circuit board includes an electrical contact hole formed on the edge of the opening and covered by the coil substrate, wherein A conductive material is disposed on the electrical contact hole to electrically connect the circuit board to the coil substrate.
  7. The electromagnetic drive module of claim 1, wherein the fixing portion comprises a base, an opening penetrating the base, wherein a flange protrudes from the edge of the opening toward the movable portion, and a plurality of grooves are formed Above the flange, a portion of the movable portion is located within the recess.
  8. The electromagnetic drive module of claim 1, wherein the movable portion further comprises a connecting material, and the electromagnetic driving module further comprises an elastic component, wherein the elastic component fixes the movable portion by the connecting material The lower surface, wherein when the movable portion is closest to the fixed portion, the joint material position overlaps with the plane of the surface of the fixed portion as viewed in a direction perpendicular to the main shaft.
  9. The electromagnetic drive module of claim 1, wherein the electromagnetic component comprises: a frame; a focus drive coil disposed on the carrier; and a magnetic component disposed facing the focus drive coil, and Set on the frame, The portion of the magnetic element overlaps the plane in which the surface of the fixed portion is located, as viewed in a direction perpendicular to the main axis, in all ranges of movement of the movable portion relative to the fixed portion.
  10. A lens driving device comprising: the electromagnetic driving module according to claim 1; and a lens assembly disposed on the movable portion, wherein an optical axis of the lens assembly is overlapped with the main shaft.
TW105136582A 2016-02-04 2016-11-10 Electromagnetic driving module and lens driving device using the same TWI624135B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US201662291311P true 2016-02-04 2016-02-04
US62/291,311 2016-02-04

Applications Claiming Priority (3)

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CN201611066776.9A CN107040111B (en) 2016-02-04 2016-11-28 The lens driving apparatus of electromagnetic drive module and application the electromagnetic drive module
US15/421,057 US20170227784A1 (en) 2016-02-04 2017-01-31 Electromagnetic driving module and lens driving device using the same
JP2017018760A JP2017156742A (en) 2016-02-04 2017-02-03 Electromagnetic drive module and lens drive unit having the same

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TWI468769B (en) * 2013-12-11 2015-01-11 Tdk Taiwan Corp An apparatus having a spring plate connecting with 3d circuit terminals
JP6666538B2 (en) * 2014-05-14 2020-03-18 ミツミ電機株式会社 Lens driving device, camera module, and mobile terminal with camera
JP6458378B2 (en) * 2014-07-11 2019-01-30 ミツミ電機株式会社 Lens driving device, camera module, and mobile terminal with camera
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TW201129822A (en) * 2010-02-22 2011-09-01 Tdk Taiwan Corp Anti-shake structure of lens auto-focus module
TW201403160A (en) * 2012-07-04 2014-01-16 Tdk Taiwan Corp Lens focusing device
TW201543135A (en) * 2014-05-15 2015-11-16 Tdk Taiwan Corp Tri-axis closed-loop anti-shake structure
TWM504958U (en) * 2014-12-02 2015-07-11 Largan Precision Co Ltd Lens actuating module

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