CN107526147B - Lens driving device - Google Patents
Lens driving device Download PDFInfo
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- CN107526147B CN107526147B CN201710451087.8A CN201710451087A CN107526147B CN 107526147 B CN107526147 B CN 107526147B CN 201710451087 A CN201710451087 A CN 201710451087A CN 107526147 B CN107526147 B CN 107526147B
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- corner
- coil
- holding member
- wire
- driving device
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
Abstract
The invention provides a lens driving device, wherein even if strong impact is applied to a lens driving device body, a wire of a coil is not easy to break. A lens driving device (100) is provided with a lens holding member (20), a plate spring, and a coil (10), wherein the lens holding member is provided with a prismatic protruding portion (21) having a plurality of corner portions (22) including a first corner portion (23), and the coil has: a coil body (11) formed by winding a conductive wire (19) around the outer periphery of the lens holding member; a winding section (13) formed by winding a wire around the protruding section; and a wound portion (15) located between the coil main body portion and the wound portion, the leaf spring having a joint portion adjacent to the wound portion, the joint portion of the wound portion and the leaf spring being joined by a joining material, the first corner portion being a corner portion of the plurality of corner portions, to which the wire of the wound portion extending from the wound portion first comes into contact, and having a curved surface portion (23a) of an arc shape gentler than the other corner portions.
Description
Technical Field
The present invention relates to a lens driving device, and more particularly, to a lens driving device in which an end of a coil is connected to a plate spring by solder or the like.
Background
Portable electronic devices such as mobile phones and smart phones include products having an imaging function. The lens used for photographing in these apparatuses is driven by a lens driving device using a VCM (Voice Coil Motor). The lens driving device includes a lens holding member capable of holding a lens body, a driving mechanism for moving the lens holding member in the optical axis direction, and a biasing member for movably supporting the lens holding member in the optical axis direction. A coil is provided in the drive mechanism, and a plate spring is used as the urging member. Then, the coil is configured such that its end is welded to the plate spring.
As a lens driving device in which an end portion of the coil is welded to the plate spring, a lens driving device described in patent document 1 is known. Hereinafter, a lens driving device 900 described in patent document 1 will be described with reference to fig. 9.
The lens driving device 900 includes: a lens holding member 901, a plate spring 902 for movably supporting the lens holding member 901, a support member to which the plate spring 902 is fixed, and a moving mechanism including at least a magnet and a coil 905 for moving the lens holding member 901 in the optical axis direction. A projection 901a projecting downward (in the Z2 direction) of the plate spring 902 is provided at the lower portion (on the Z2 side) of the lens holding member 901, an end 905b of the coil 905 is wound around the projection 901a, a joint 902a is provided to the plate spring 902, and the end 905b of the coil 905 is welded to the joint 902 a. The distance separating the end 905b of the coil 905 wound around the projection 901a from the joint 902a is set to be greater on the tip side of the projection 901a than on the base side of the projection 901 a.
With this configuration, the lens driving device 900 achieves the following effects: the end 905b of the coil 905 can be reliably welded to the plate spring 902, and the plate spring 902 can be prevented from coming into contact with each other when mounted on the lens holding member 901.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2015-099322
Problems to be solved by the invention
In the lens driving device 900, a wire of a coil 905 is wound around a protrusion 901a provided on a lens holding member 901. However, since the protrusion 901a is formed in a prism shape having a plurality of corners, when an undesirable strong impact is applied by dropping or the like, the wire of the coil 905 may be broken at the corners. In particular, when a strong impact such as dropping is applied, the possibility of wire breakage of the coil 905 at the corner where the wire of the coil 905 starts to be wound becomes relatively high.
Disclosure of Invention
The present invention has been made in view of the above-described circumstances of the conventional technology, and provides a lens driving device in which a wire of a coil is not easily broken even when a strong impact is applied to a lens driving device main body.
Means for solving the problems
In order to solve the above problem, a lens driving device according to the present invention includes: a cylindrical lens holding member capable of holding a lens body; a plate spring, a part of which is fixed to the lens holding member and supports the lens holding member to be movable in an optical axis direction; and a driving mechanism configured to move the lens holding member in the optical axis direction, the driving mechanism including at least a magnet and a coil, wherein the lens holding member is provided with a prismatic protruding portion protruding in the optical axis direction, the prismatic protruding portion having a plurality of corners including a first corner, and the coil includes: a coil body portion formed by winding a conductive wire around an outer periphery of the lens holding member; a winding portion around which the wire is wound; and a wound portion located between the coil main body portion and the wound portion, wherein the leaf spring has an engaging portion located adjacent to the wound portion, and the wound portion and the engaging portion of the leaf spring are joined by a joining material, and the leaf spring has the following characteristics: the first corner portion is a corner portion, of the plurality of corner portions, to which the wire material of the winding portion extending from the drawn portion first comes into contact, and has a curved surface portion having a more gentle arc shape than the other corner portions.
In the lens driving device configured as described above, the first corner portion of the protruding portion, which the wire of the winding portion extending from the winding portion first contacts, has a gently arc-shaped curved surface portion, and therefore, even when a large impact is applied by dropping or the like, the wire can be made less likely to be cut at the first corner portion.
The above configuration has the following features: and a guide portion that is provided outside the protruding portion, has an arc shape that is larger than the arc shape of the first corner portion and that allows the wire material to abut against the guide portion, and guides the wire material of the winding portion to the protruding portion side, the wire material extending along the guide portion to the first corner portion, and the wire material extending along the guide portion to the first corner portion.
In the lens driving device configured as described above, the wire is guided to the first corner portion via the guide portion having the circular arc shape larger than the curved surface portion of the first corner portion, and the first corner portion has the curved surface portion having the circular arc shape gentler than the other corner portion of the protruding portion.
The above configuration has the following features: the protruding portion is provided adjacent to the guide portion so that one side surface of the protruding portion is continuous with the guide portion.
In the lens driving device configured as described above, the protruding portion and the guide portion are continuously adjacent to each other, and therefore, the wire can be prevented from being broken between the protruding portion and the guide portion.
The above configuration has the following features: the lens holding member is provided with a base portion, the guide portion is formed by a part of a peripheral surface of the base portion, and the protrusion portion is provided on the base portion.
In the lens driving device configured as described above, since the projection is provided on the base portion, the winding portion can be easily formed by winding the wire material from the root portion of the projection.
The above configuration has the following features: the protrusion is formed in a substantially quadrangular prism shape, a portion of the winding portion is held linearly by the protrusion while facing the wire located between the first corner portion and the guide portion, and the wire is engaged with the plate spring.
In the lens driving device configured as described above, since the protruding portion is formed in a substantially quadrangular prism shape, even if the first corner portion has a large arc-shaped curved surface portion, the wire can be appropriately held by the protruding portion through the other corner portions. Further, since the linear wound portion located between the two different corner portions from the first corner portion is joined to the leaf spring, the joining by the joining material such as solder is also performed favorably.
Effects of the invention
In the lens driving device according to the present invention, the first corner of the protruding portion, which the wire of the winding portion extending from the winding portion first contacts, has a gently arc-shaped curved surface portion, and therefore, even when a large impact is applied by dropping or the like, the wire can be made less likely to be cut at the first corner.
Drawings
Fig. 1 is an exploded perspective view showing each component constituting a lens driving device according to an embodiment of the present invention.
Fig. 2 is a perspective view showing an external appearance of the lens driving device.
Fig. 3 is a perspective view showing an external appearance of the lens driving device in a state where the yoke and the cover are removed.
Fig. 4 is a perspective view of the lens holding member equipped with the coil and the plate spring.
Fig. 5 is an enlarged perspective view of the lens holding member.
Fig. 6 is an enlarged perspective view of the lens holding member of the wire material around which the coil is wound.
Fig. 7 is an enlarged side view of the lens holding member after the coil and the plate spring are welded.
Fig. 8 is an enlarged perspective view of the lens holding member after the coil and the plate spring are welded.
Fig. 9 is a side view showing a lens holding member around which a coil is wound in the conventional example.
In the figure:
10 coil
11 coil body part
13 winding part
15 draw-wound part
19 wire rod
20 lens holding member
21 projection
21a tip end portion
21b root of Siberian ginseng
21c side surface
22 corner
22a inner corner
22b outside corner
23 first corner
23a curved surface part
24 flange part
25 lens holding part
25a thread groove
26 cylindrical part
27 pedestal portion
28 guide part
28a inclined plane
29 fitting part
30 leaf spring
30a one side
30b another side
30c joint
31 leaf spring part
31a inner part
31b outer part
31c spring part
33 upper leaf spring
33a inner part
33b outer part
33c spring part
40 base part
45 sheet metal part
49 fitting part
50 driving mechanism
54 magnet
56 magnetic yoke
56a top surface
56b outer wall part
56c inner wall portion
60 cover body
71 bonding material
100 lens driving device
L1 optical axis direction
Detailed Description
[ embodiment ] A method for producing a semiconductor device
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The lens driving device 100 of the present embodiment is used as a VCM used in a camera built in a mobile electronic device such as a mobile phone or a smart phone, for example. The application of the lens driving device 100 of the present embodiment is not limited to these, and can be appropriately changed.
First, the overall configuration of the lens driving device 100 will be described with reference to fig. 1 to 4. Fig. 1 is an exploded perspective view showing components constituting a lens driving device 100, and fig. 2 is a perspective view showing an external appearance of the lens driving device 100. Fig. 3 is a perspective view showing an external appearance of the lens driving device 100 with the yoke 56 and the cover 60 removed, and fig. 4 is a perspective view of the lens holding member 20 with the coil 10 and the plate spring 30 attached. Fig. 4 is described with the + Z direction set to the lower side of the drawing, contrary to fig. 2 and 3.
As shown in fig. 1, the lens driving device 100 includes a base member 40 made of a synthetic resin material, a lens holding member 20 disposed on the upper side of the base member 40, a plate spring 30 and an upper plate spring 33 supporting the lens holding member 20 movably in an optical axis direction L1 (Z direction), a driving mechanism 50 having a yoke 56, a plurality of magnets 54 and a coil 10 for moving the lens holding member 20 in an optical axis direction L1, a metal plate member 45 provided on the base member 40, and a cover 60, wherein the plate spring 30 constitutes a lower plate spring with respect to the upper plate spring 33.
As shown in fig. 2, the lens driving device 100 is formed in a substantially rectangular parallelepiped shape, and a large opening penetrating in the Z direction is formed in the center portion, a lens body as an external component can be held by the lens holding member 20 and can be driven in the optical axis direction L1 (Z direction) by the driving mechanism 50, and a cover 60 made of a synthetic resin material is attached to the lens driving device 100 in order to protect the upper leaf spring 33.
The yoke 56 constituting a part of the drive mechanism 50 is formed of a metal plate material, and is formed into a rectangular shape in a plan view with the Z-direction open, as shown in fig. 2. The yoke 56 has a top surface 56a with an opening formed in the center, and has: an annular outer wall portion 56b that continuously forms a side surface of the yoke 56 from the outer periphery of the top surface 56 a; and four inner wall portions 56c (see fig. 1) which are continuous from the opening of the top surface 56a and which face the corner portions of the outer wall portion 56b inside the outer wall portion 56 b.
The lens holding member 20 is made of a synthetic resin material and is formed in a substantially cylindrical shape as shown in fig. 3, the lens holding member 20 has a cylindrical portion 26 extending in the Z direction to form a cylindrical shape, and a flange portion 24 extending in the radial direction of the cylindrical portion 26 is provided at one end portion in the optical axis direction L1 of the cylindrical portion 26 as shown in fig. 4, and further, a lens holding portion 25 forming a cylindrical shape capable of holding a lens body as an external component is formed inside the cylindrical portion 26, and a screw groove 25a capable of attaching the lens body is formed along the inner peripheral surface of the lens holding portion 25 in the lens holding portion 25.
The coil 10 is formed of a conductive wire material 19, and as shown in fig. 4, is wound around the lens holding member 20 in a ring shape of a substantially octagonal shape in a plan view, and is bundled to form a part of the driving mechanism 50, and by passing a current through the coil 10, the driving mechanism 50 shown in fig. 2 can be driven, and the lens holding member 20 holding the lens body can be moved in the optical axis direction L1, and the configuration of the coil 10 will be described in detail later.
As shown in fig. 3, the magnet 54 is formed in a columnar shape having a substantially trapezoidal shape in a plan view. In the present embodiment, four magnets 54 are used, and the four magnets 54 are attached to the corner portions of the outer wall portion 56b of the yoke 56 shown in fig. 2 with an adhesive. The magnet 54 is magnetized in a direction of a straight line orthogonal to the short-side surface and the long-side surface (strictly speaking, circular arc surface) of the substantially trapezoidal shape.
The plate spring 30 and the upper plate spring 33 are made of a conductive metal thin plate, and as shown in fig. 3, the plate spring 30 and the upper plate spring 33 are disposed so as to face each other with the lens holding member 20 interposed therebetween. Further, the plate spring 30 is insulated from the upper plate spring 33.
The leaf spring 30 constitutes a lower (-Z side) leaf spring, and is formed of two leaf spring portions 31 as shown in fig. 4. The two leaf spring portions 31 are formed by connecting an inner portion 31a forming an arc shape in plan view and an outer portion 31b forming the outer periphery of the leaf spring 30 by spring portions 31c of two thin metal plates having a serpentine shape. In the plate spring 30, two plate spring portions 31 are disposed to face each other, and the two plate spring portions 31 form a pair and have a substantially square shape having an opening at the center in a plan view. The two plate spring portions 31 are connected to the coil 10 by solder. As a result, the two plate spring portions 31 are electrically connected via the coil 10.
As shown in fig. 3, the upper plate spring 33 is formed in a substantially square shape having an opening at the center in a plan view by connecting an inner portion 33a forming a substantially circular shape in a plan view and an outer portion 33b forming a substantially square shape of the outer periphery of the upper plate spring 33 by spring portions 33c of four thin metal plates having a serpentine shape.
As shown in fig. 4, the plate spring 30 is assembled with two inner portions 31a forming a circular opening, and fitted to the fitting portions 29 provided at a plurality of positions on the lens holding member 20. As shown in fig. 3, two outer side portions 31b that are combined to form a substantially square-shaped outer periphery are attached to attachment portions 49 provided at a plurality of positions on the base member 40. Similarly, in the upper plate spring 33, an inner portion 33a forming an opening is also attached to the lens holding member 20 with an adhesive, and an outer portion 33b forming an outer periphery of a substantially square shape is attached to the top surface 56a of the yoke 56 with an attachment portion (not shown) protruding from the lower surface of the cover 60.
With this configuration, the inner portion 31a of the two plate spring portions 31 forming the opening of the plate spring 30 can move in the Z direction with respect to the outer portion 31b of the two plate spring portions 31 forming the outer periphery of the substantially square shape, and the same applies to the upper plate spring 33, in other words, the lens holding member 20 holding the lens body can move in the optical axis direction L1 (Z direction) with respect to the base member 40 and the cover 60 fixed to the portable electronic device incorporating the lens driving device 100, and as a result, the lens holding member 20 holding the lens body can generate a thrust in the optical axis direction L1 by causing the driving mechanism 50 to operate by passing a current through the coil 10.
A metal plate member 45 is embedded in the base member 40. As shown in fig. 3, a part of the metal plate member 45 is exposed from the bottom surface of the base member 40. The metal plate member 45 is composed of a plurality of members, one of which is connected to one plate spring portion 31 of the plate spring 30, and the other of which is connected to the other plate spring portion 31 of the plate spring 30. The metal plate members 45 connected to the two plate spring portions 31 are configured such that: is connected to a main body of a portable electronic device such as a mobile phone or a smart phone incorporating the lens driving device 100, and applies a voltage for driving the lens from the main body of the portable electronic device between the two leaf spring portions 31 to flow a current through the coil 10.
Next, the structure of the lens holding member 20, the method of winding the wire 19 of the coil 10 around the protrusion 21, and the joining of the coil 10 and the plate spring 30 in the lens holding member 20 will be described with reference to fig. 4 to 8. Fig. 5 is an enlarged perspective view of the lens holding member 20, and fig. 6 is an enlarged perspective view of the lens holding member 20 in a state where the wire 19 of the coil 10 is wound. Fig. 7 is an enlarged side view schematically showing the lens holding member 20 in a state where the coil 10 and the plate spring 30 are welded to each other, and fig. 8 is an enlarged perspective view of the lens holding member 20 in a state where the coil 10 and the plate spring 30 are welded to each other. Fig. 5 to 8 are also drawn with the + Z direction set to the lower side of the drawing, as in fig. 4.
As shown in fig. 4, the flange portion 24 of the lens holding member 20 is provided with two projecting portions 21 projecting in the optical axis direction L1 (Z direction) at two locations, and the wire 19 forming the coil 10 is wound around each of the two projecting portions 21, and both ends of the coil 10 can be held by the lens holding member 20 by winding the wire 19 of the coil 10 around each of the two projecting portions 21, and in each of the two projecting portions 21, the position of the projecting portion 21 on the-X side in fig. 4 is the winding start side of the coil 10, and the position of the projecting portion 21 on the + X side is the winding end side, and the winding end side of the coil 10 is shown in fig. 5 to 8 to be described later.
As shown in fig. 4, the coil 10 has: a coil body 11 formed by winding a wire 19 around the outer periphery of a lens holding member 20; a winding portion 13 in which a wire 19 is spirally wound around the protrusion portion 21; and a wound portion 15 located between the coil main body portion 11 and the wound portion 13.
As shown in fig. 5, the lens holding member 20 is provided with a base portion 27 formed in a substantially rectangular shape in a plan view significantly higher than the flange portion 24 in the-Z direction, and the protrusion portion 21 is provided on the base portion 27, and the protrusion portion 21 is formed to protrude in a prism shape along the optical axis direction L1, that is, the protrusion portion 21 is formed to extend in the upward direction (-Z direction) of fig. 5 from a base portion 21b on the base portion 27, and has a tip portion 21a having a flat surface at the upper end, and has four side surfaces including a side surface 21c on the + Y side, and is formed in a substantially quadrangular shape.
The protruding portion 21 has a plurality of (four in the present embodiment) corner portions 22 each including two inner corner portions 22a and two outer corner portions 22b, and one of the two inner corner portions 22a constitutes a first corner portion 23.
As shown in fig. 6, the first corner 23 is a corner, among the plurality of (four) corners 22, with which the wire 19 of the winding portion 13 extending from the drawn portion 15 of the coil 10 first comes into contact, and as shown in fig. 5 and 6, has a curved surface portion 23a having a gentler arc shape than the other corners 22.
Further, a guide portion 28 is provided on the outer side (outer peripheral side) of the protruding portion 21, the guide portion 28 having an arc shape larger than the arc shape of the curved portion 23a of the first corner portion 23, against which the wire 19 can be abutted, and guiding the wire 19 of the pull-and-wind portion 15 to the protruding portion 21 side, the wire 19 extending along the guide portion 28 to the first corner portion 23. As shown in fig. 5, the protruding portion 21 is provided adjacent to the guide portion 28 so that the one side surface 21c of the protruding portion 21 is continuous with the guide portion 28.
The guide portion 28 is formed by a part of the peripheral surface of the base portion 27, and an inclined surface 28a rising in the-Z direction from the end portion of the base portion 27 on the + X side toward the first corner portion 23 is formed on the side thereof. Therefore, as shown in fig. 6, the wire 19 of the wound portion 15 extends toward the first corner portion 23 while coming into contact with the guide portion 28 and the inclined surface 28 a.
As shown in fig. 6, the wire 19 of the wound portion 15 of the coil 10 extends from the guide portion 28 to the first corner portion 23, then bends along the curved surface portion 23a of the first corner portion 23, which is one of the inner corner portions 22a, and then is wound via the other inner corner portion 22a and the two outer corner portions 22 b. The wire 19 is wound around the protruding portion 21a plurality of times to form a wound portion 13.
Since the first corner 23 of the protruding portion 21, which the wire 19 of the winding portion 13 extending from the drawn portion 15 first contacts, has the gently arc-shaped curved surface portion 23a, the wire 19 is less likely to be cut at the first corner 23 even when a large impact is applied by dropping or the like. On the other hand, the wire 19 can be reliably held at the inner corner 22a and two outer corners 22b of the protrusion 21 other than the first corner 23.
As shown in fig. 7, in the plate spring 30, the outer portion 31b is located on the-Z side, the inner portion 31a is located on the + Z side, the outer portion 31b is located on the outer side (the front side in fig. 7) of the protruding portion 21, and the inner portion 31a is located on the inner side and the lateral side of the protruding portion 21. The + Z side of the inner portion 31a is one surface 30a of the plate spring 30, and the-Z side of the inner portion 31a is the other surface 30b of the plate spring 30.
In the plate spring 30, one surface 30a of the plate spring 30 faces the flange portion 24 of the lens holding member 20 in parallel, and has a predetermined interval in a side view. Then, as described above, the protrusion 21 is provided to protrude from the seat portion 27 of the lens holding member 20 toward the other surface 30b side of the plate spring 30. The distal end 21a of the protruding portion 21 protrudes in the-Z direction with respect to the end of the wire 19 forming the winding portion 13 of the coil 10.
The plate spring 30 has an engaging portion 30c at the inner portion 31a, and the wire 19 of the winding portion 13 and the engaging portion 30c of the plate spring 30 are engaged by the engaging material 71. The engaging portion 30c is provided at a portion adjacent to the protruding portion 21 on the other surface 30b side of the plate spring 30. Solder is used as the bonding material 71. In the present embodiment, solder is used as the bonding material 71, but a conductive adhesive may be used as the bonding material 71.
As shown in fig. 8, a part of the winding portion 13 of the coil 10 is held linearly in the protruding portion 21 with the protruding portion 21 interposed therebetween, while the wire 19 located between the first corner portion 23 of the protruding portion 21 and the guide portion 28 adjacent to the protruding portion 21 is opposed to the protruding portion 21, and the wire 19 of the part is joined to the plate spring 30. The wire 19 is wound between two corners 22 each including an inner corner 22a different from the first corner 23 and an outer corner 22b adjacent to the inner corner 22 a. In this way, the portion of the straight wound portion 13 between the two corner portions 22 of the wound portion 13, which are constituted by the inner corner portion 22a and the outer corner portion 22b adjacent thereto, is joined to the leaf spring 30, and therefore, the joining can be performed satisfactorily.
An insulating film is applied to the wire 19 of the coil 10 at the portions on the coil body 11 and the drawn portion 15 sides, but no insulating film is applied to the wire 19 of the wound portion 13 to which welding is applied. Therefore, the welding can be performed between the wire 19 of the winding portion 13 of the coil 10 and the joint portion 30c of the plate spring 30. Further, before welding, pre-welding may be applied to the wire 19 of the winding portion 13 to which the insulating film is applied, so that welding is facilitated.
In the present embodiment, the winding portion 13 of the protruding portion 21 on the winding end side of the coil 10 is described, but the present invention can also be applied to the winding portion 13 of the protruding portion 21 on the winding start side of the coil 10.
The following describes the effects of the present embodiment.
In the lens driving device 100, the first corner 23 of the protruding portion 21, which is first contacted by the wire 19 of the winding portion 13 extending from the winding portion 15, has the gently arc-shaped curved surface portion 23a, and therefore, even when a large impact is applied by dropping or the like, the wire 19 is less likely to be cut at the first corner 23.
Further, since the wire material 19 is guided to the first corner portion 23 via the guide portion 28 having the circular arc shape larger than the curved surface portion 23a of the first corner portion 23 and the first corner portion 23 has the curved surface portion 23a having the circular arc shape gentler than the other corner portion 22 of the protruding portion 21, the wire material 19 is guided from the coil main body portion 11 to the winding portion 13 so as to gradually change the curvature, and it is possible to make the pressure less likely to be applied to the wire material 19 and to make the wire material 19 less likely to break.
Further, since the protruding portion 21 and the guide portion 28 are continuously adjacent, the wire 19 can be prevented from being broken between the protruding portion 21 and the guide portion 28.
Further, since the projection 21 is provided on the pedestal 27, the winding portion 13 can be easily formed by winding the wire material 19 from the root portion 21b of the projection 21.
Further, since the protruding portion 21 is formed in a substantially quadrangular prism shape, even if the first corner portion 23 has the curved surface portion 23a having a large circular arc shape, the wire 19 can be appropriately held by the protruding portion 21 through the other corner portions 22. Further, since the straight wound portion 13 located between the two corner portions 22 different from the first corner portion 23 is joined to the leaf spring 30, joining by welding or the like is also performed satisfactorily.
As described above, in the lens driving device of the present invention, since the first corner portion of the protruding portion, which the wire of the winding portion extending from the winding portion first contacts, has the curved surface portion having the gentle arc shape, even when a large impact is applied by dropping or the like, the wire can be made difficult to be cut at the first corner portion.
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, although the embodiment described above shows a mode in which the end of the coil 10 is soldered to the plate spring 30 located on the-Z side (lower side) of the lens drive device 100, the present invention is not limited to this, and may be applied to a case in which the end of the coil is soldered to an upper plate spring located on the + Z side (upper side) as in a lens drive device having a camera-shake correction function.
Claims (5)
1. A lens driving device is provided with: a cylindrical lens holding member capable of holding a lens body; a plate spring, a part of which is fixed to the lens holding member and supports the lens holding member to be movable in an optical axis direction; and a drive mechanism configured to move the lens holding member in the optical axis direction, the drive mechanism including at least a magnet and a coil,
the lens holding member is provided with a prismatic projection portion having a plurality of corners including a first corner, the coil having: a coil body portion formed by winding a conductive wire around an outer periphery of the lens holding member; a winding portion around which the wire is wound; and a wound portion located between the coil main body portion and the wound portion, wherein the leaf spring has an engaging portion located adjacent to the wound portion, and the wound portion and the engaging portion of the leaf spring are engaged with each other by an engaging material,
the first corner portion is a corner portion, of the plurality of corner portions, to which the wire material of the winding portion extending from the drawn portion first comes into contact, and has a curved surface portion having a more gentle arc shape than the other corner portions,
a guide portion having an arc shape larger than the arc shape of the first corner portion and capable of being abutted by the wire rod is provided outside the protrusion portion, and guides the wire rod of the winding portion to the protrusion portion side, and the wire rod extends to the first corner portion along the guide portion.
2. The lens driving device according to claim 1,
the protruding portion is provided adjacent to the guide portion so that one side surface of the protruding portion is continuous with the guide portion.
3. The lens driving device according to claim 1 or 2,
the lens holding member is provided with a base portion, the guide portion is formed by a part of a peripheral surface of the base portion, and the protrusion portion is provided on the base portion.
4. The lens driving device according to claim 1 or 2,
the protrusion is formed in a substantially quadrangular prism shape, a portion of the winding portion is opposed to the wire material located between the first corner portion and the guide portion with the protrusion interposed therebetween, and is linearly held by the protrusion, and the wire material of the portion is engaged with the leaf spring.
5. The lens driving device according to claim 3,
the protrusion is formed in a substantially quadrangular prism shape, a portion of the winding portion is opposed to the wire material located between the first corner portion and the guide portion with the protrusion interposed therebetween, and is linearly held by the protrusion, and the wire material of the portion is engaged with the leaf spring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-122346 | 2016-06-21 | ||
| JP2016122346A JP6678071B2 (en) | 2016-06-21 | 2016-06-21 | Lens drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107526147A CN107526147A (en) | 2017-12-29 |
| CN107526147B true CN107526147B (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710451087.8A Active CN107526147B (en) | 2016-06-21 | 2017-06-15 | Lens driving device |
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| CN108075589A (en) * | 2018-01-10 | 2018-05-25 | 上海硅泰电子有限公司 | The stator module and disc type electric machine of stator core winding unit, disc type electric machine |
| JP7041750B2 (en) * | 2018-08-09 | 2022-03-24 | アルプスアルパイン株式会社 | Manufacturing method of lens drive device, camera module, and lens drive device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1949415A (en) * | 2005-10-03 | 2007-04-18 | 东京零件工业股份有限公司 | Coiling sheet stype common mode choking coil |
| CN102411187A (en) * | 2010-09-17 | 2012-04-11 | 阿尔卑斯电气株式会社 | Lens Driving Device |
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| JP3199668B2 (en) * | 1997-08-25 | 2001-08-20 | 株式会社ボッシュオートモーティブシステム | Coil device |
| JP2011175160A (en) * | 2010-02-25 | 2011-09-08 | Mitsumi Electric Co Ltd | Lens driving device |
| CN202837651U (en) * | 2012-08-29 | 2013-03-27 | 阿尔卑斯电气株式会社 | Lens drive unit |
| JP5939088B2 (en) * | 2012-08-30 | 2016-06-22 | 株式会社デンソー | Rotating electric machine |
| JP3187257U (en) * | 2013-09-06 | 2013-11-14 | アルプス電気株式会社 | Lens drive device |
| JP6192044B2 (en) * | 2013-11-20 | 2017-09-06 | アルプス電気株式会社 | Lens drive device |
| JP6306357B2 (en) * | 2014-01-29 | 2018-04-04 | アルプス電気株式会社 | Lens drive device |
| JP6238236B2 (en) * | 2014-09-03 | 2017-11-29 | アルプス電気株式会社 | Lens drive device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949415A (en) * | 2005-10-03 | 2007-04-18 | 东京零件工业股份有限公司 | Coiling sheet stype common mode choking coil |
| CN102411187A (en) * | 2010-09-17 | 2012-04-11 | 阿尔卑斯电气株式会社 | Lens Driving Device |
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| Publication number | Publication date |
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| JP2017227695A (en) | 2017-12-28 |
| CN107526147A (en) | 2017-12-29 |
| JP6678071B2 (en) | 2020-04-08 |
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