JP2016110106A - Lens holder, lens drive device, camera device and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens holder that can facilitate aligned winding with respect to the lens holder and can suppress a coil wound around the lens holder from playing in a voice coil motor type lens drive device having a prescribed length in up/bottom directions, and a coil wound in an outer periphery, and to provide a lens drive device, a camera device and an electronic apparatus that have the lens holder employed.SOLUTION: A lens holder 4 has: a flange part 14 that protrudes outwardly in a radial direction from an outer peripheral wall of the lens holder 4 and positions a height position on a bottom side of a coil 5 to be wound around an outer periphery of the lens holder 4; and a projection part 13c that projects outwardly in the radial direction from the outer peripheral wall of the lens holder 4. The projection part 13c comprises an inclination face 15c inclining downwardly from an outer side in the radial direction toward an inner side in the radial direction, in which a most inner diameter side of the inclination face 15c positions a height position on a top side of the coil 5.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a lens holder in a voice coil motor type lens driving device having a predetermined length in the vertical direction and having a coil wound around the outer periphery thereof, a lens driving device including the lens holder, and a camera device In addition, the present invention relates to an electronic device.

  2. Description of the Related Art Conventionally, a voice coil motor type (VCM type) lens driving device has been employed in autofocus cameras and electronic devices with cameras. This lens driving device adjusts the position of the lens in the optical axis direction or the like to perform focusing or zooming.

  In the lens driving device of the voice coil motor system, for example, a configuration as shown in (Patent Document 1) has been proposed.

  The lens driving device of this (Patent Document 1) includes a lens holder, a spacer portion, a coil, a yoke, a magnet, a pair of fixing members, and a conductive sheet member.

  The lens holder has a predetermined length in the vertical direction, and holds the lens in a state of being surrounded from the periphery.

  A plurality of spacer portions are formed at regular intervals in the circumferential direction on the outer peripheral surface of the lens holder, and have a guide surface at a position spaced apart from the outer peripheral surface by a predetermined distance.

  The coil is annular in plan view, and is attached so as to surround the lens holder in a state where the inner peripheral surface is in surface contact with the guide surfaces of the plurality of spacer portions.

  The yoke is combined with the lens holder and includes an outer tube portion and a plurality of claw portions. The outer cylinder portion has a frame shape that can accommodate the coil therein. The plurality of claw portions are bent at 90 degrees from the outer edge on one end side in the vertical direction of the outer cylinder portion toward the lens holder side, and further bent at 90 degrees from the back portion, and adjacent to each other. It is arranged between the coil and the outer peripheral surface of the lens holder between the spacer portions.

  The magnet is fixed to the inner surface of the outer cylindrical portion of the yoke and is disposed to face the coil.

  A pair of fixing members sandwich and fix the yoke from above and below while the lens holder is movable.

  The conductive sheet member is sandwiched between the pair of fixing members and the yoke, and applies a spring force in the reverse direction when the lens holder moves and is electrically connected to the coil.

  The guide surface is formed to be at least as high as the height of the coil in the vertical direction.

  Furthermore, the plurality of spacer portions have protrusions that position the coils in the height direction.

  In the lens driving device of this (Patent Document 1), the coil is a directly wound coil that is directly wound around the guide surfaces of the plurality of spacer portions.

  The coil can be stably supported in an accurately positioned state, and the gap between the parts can be minimized to reduce the size.

  FIGS. 7A and 7B are diagrams for explaining a method in which a coil is wound around a conventional lens holder employed in such a lens driving device. Conventionally, spacer portions 101 a and 101 b that are projections to be positioned in the height direction of the coil 102 are formed on the outer peripheral surface of the lens holder 101. In order to securely put the coil wire between the spacer portions 101a and 101b, the vertical distance between the spacer portions 101a and 101b is the vertical winding width of the coil 102 when aligned winding + lens holder It was necessary to exceed the dimensional tolerance of 101.

  The aligned winding is necessary for obtaining a stable thrust for performing position control such as focus.

  In the method shown in FIG. 7A, the coil 102 is wound in the circumferential direction of the lens holder 101 with reference to the spacer portions 101a and 101b. That is, the vertical winding width of the coil 5 is formed to be the same as the vertical distance between the spacer portions 101a and 101b. For this reason, there is a problem that alignment winding is difficult.

  The method shown in FIG. 7B performs aligned winding without being restricted by the position of the spacer portion 101a. If it does in this way, a crevice will be formed between spacer part 101a and coil 102 after winding. Due to the existence of this gap, there is a problem that the coil 102 wound around the lens holder 101 is rattled as indicated by an arrow 103.

JP 2007-121695 A

  The present invention makes it possible to easily perform aligned winding of a coil around a lens holder in a voice coil motor type lens driving device having a predetermined length in the vertical direction and having a coil wound around the outer periphery, In addition, an object of the present invention is to propose a lens holder that can prevent the coil wound around the lens holder from rattling, and a lens driving device, a camera device, and an electronic device in which the lens holder is used.

The invention of claim 1
A lens holder in a voice coil motor type lens driving device having a predetermined length in the vertical direction and having a coil wound around the outer periphery,
A flange that projects outward in the radial direction from the outer peripheral wall of the lens holder and positions a height position on the lower side of the coil wound around the outer periphery of the lens holder;
A protrusion projecting outward in the radial direction from the outer peripheral wall of the lens holder,
The protrusion has an inclined surface that is inclined downward from the outer side in the radial direction toward the inner side in the radial direction, and the innermost diameter side of the inclined surface positions the height position on the upper side of the coil. This is a lens holder.

  According to the present invention, it is possible to easily perform the winding of the coil around the lens holder in the voice coil motor type lens driving device having a predetermined length in the vertical direction and having the coil wound around the outer periphery. In addition, it is possible to provide a lens holder that can prevent the coil wound around the lens holder from rattling, a lens driving device, a camera device, and an electronic device in which the lens holder is employed.

The disassembled perspective view showing an example of the lens drive device of this invention by which the lens holder of this invention is employ | adopted. It is a figure showing an example of the lens drive device of this invention by which the lens holder of this invention is employ | adopted, Comprising: (a) is a top view, (b) is AA sectional drawing. The partially expanded perspective view from the downward direction of the lens holder which concerns on one Embodiment of this invention. The perspective view of the lens holder which concerns on one Embodiment of this invention. The front view of the lens holder which concerns on one Embodiment of this invention. The front view showing the lens holder which shows the state by which the coil which concerns on one Embodiment of this invention is wound. (A), (b) is a figure explaining the conventional system which winds a coil around the conventional lens holder employ | adopted as a lens drive device.

  The present invention is employed in an electronic device such as an autofocus camera in which a VCM lens driving device is incorporated, a mobile phone equipped with such an autofocus camera, or a multi-function mobile phone.

(Embodiment 1)
An embodiment of a lens holder of the present invention will be described with reference to the accompanying drawings. First, a VCM type lens driving apparatus in which the lens holder according to the first embodiment is employed will be described with reference to FIGS.

  In FIG. 2B, the upper side is the front side in the optical axis direction, and the lower side is the rear side in the optical axis direction.

  A lens driving device 1 illustrated in FIGS. 1 and 2 includes a frame 2, a yoke 3, a lens holder 4, a coil 5, a magnet 6, a front spring 7, a rear spring 8, and a base 9.

  A yoke 3 is supported on a base 9, and a magnet 6 is attached to the yoke 3. A lens (not shown) is supported by a lens holder 4 having a predetermined length in the vertical direction (optical axis direction). A coil 5 is disposed on the outer periphery of the lens holder 4 so as to face the magnet 6 described above. In the illustrated example, the yoke 3 is annular and is fixedly disposed between the base 9 and the frame 2.

  The front spring 7 and the rear spring 8 supported by the frame 2 and the base 9 respectively sandwich the lens holder 4 from the front and rear in the optical axis direction. Thereby, the lens holder 4 is supported so as to be movable in the vertical direction and the like.

  The magnet 6 is disposed inside the outer peripheral wall 3 a of the yoke 3. In the illustrated embodiment, the annular yoke 3 is a substantially rectangular tubular body that is substantially rectangular in plan view. The four magnets 6 are respectively arranged inside the outer peripheral walls 3 a of the four corners of the yoke 3.

  The lens holder 4 having a predetermined length in the vertical direction (optical axis direction) supports a lens (not shown) inside thereof. A coil 5 is wound around the outer periphery of the lens holder 4 so as to face the four magnets 6. In the illustrated embodiment, a gap is provided between the outer periphery of the lens holder 4 and the coil 5 at a position corresponding to the four magnets 6, and the inner peripheral wall 3 b of the yoke 3 is inserted into the gap. .

  In the illustrated embodiment, the inner peripheral side of each magnet 6 has an arc shape along the outer periphery of the lens holder 4 in correspondence with the lens holder 4 having a substantially cylindrical shape.

  Thrust is generated by controlling the current applied to the coil 5, and the lens holder 4 and the lens supported by the lens holder 4 are moved in the optical axis direction. As a result, the lens (not shown) moves to a position that balances the restoring force of the front spring 7 and the rear spring 8, and focusing, zooming, and the like are performed.

  3-6 represents an example of the lens holder 4 of embodiment of this invention.

  The lens holder 4 has a cylindrical shape and has a predetermined length in the vertical direction (optical axis direction). The lens holder 4 supports a lens (not shown) on its inner side, and a coil 5 is wound around its outer periphery.

  Protrusions 13a, 13b, 13c, and 13d that protrude outward from the outer peripheral wall 12 in the radial direction are formed on the outer periphery of the lens holder 4 at a predetermined interval in the circumferential direction.

  The protrusions 13 a to 13 d serve to position the height position on the upper side of the coil 5 wound around the outer periphery of the lens holder 4.

  On the other hand, in the illustrated embodiment, the upper side surface of the annular flange 14 formed on the outer periphery on the lower side of the lens holder 4 is the height position on the lower side of the coil 5 wound around the outer periphery of the lens holder 4. Plays a role in positioning.

  As shown in FIGS. 4 and 5, in the lens holder 4 of the present embodiment, the flange 14 provided on the outer peripheral wall of the lens holder 4 is cut at a predetermined position in the circumferential direction of the outer peripheral wall of the lens holder 4. A notch 24 is provided. In the illustrated embodiment, the notch 24 is formed at a position where the protrusions 13 a to 13 d are formed in the circumferential direction of the lens holder 4.

  Although the notch 24 is formed in the flange 14 at the position where the protrusions 13a to 13d are formed, the height position of the upper side surface of the flange 14 is also at the position where the notch 24 is formed. Is the height position on the lower side of the coil 5 wound around the outer periphery of the lens holder 4.

  Further, a winding surface 4a that protrudes outward in the radial direction from the main body of the outer peripheral wall 12 with a predetermined interval in the circumferential direction between the protrusions 13a to 13d and the flange portion 14 in the optical axis direction. 4b, 4c, 4d are formed. When the coil 5 is wound, the inner peripheral surface of the coil 5 comes into contact with the winding surfaces 4a to 4d.

  In the present embodiment, the protrusions 13a to 13d are provided at positions corresponding to the winding surfaces 4a to 4d, respectively. Moreover, the notch part 24 is provided in the collar part 14 in the position corresponding to protrusion part 13a-13d. On the contrary, the collar body part other than the notch 24 of the collar 14 is provided at a position corresponding to the circumferential interval between the protrusions 13a to 13d. The inner peripheral wall 3b of the yoke 3 is inserted into a gap between two adjacent winding surfaces of the raised winding surfaces 4a to 4b.

  In addition, it can also be set as the structure which does not raise the winding surfaces 4a-4d from the main body of the outer peripheral wall 12. FIG. In this case, the yoke 3 has a structure that does not include the inner peripheral wall 3 b that is inserted into the gap formed between the outer periphery of the lens holder 4 and the coil 5.

  The protrusions 13a to 13d include inclined surfaces 15a to 15d that are inclined downward from the outer side in the radial direction toward the inner side in the radial direction. The inclined surfaces provided in the protrusions 13a to 13d are represented by reference numerals 15a to 15d, respectively.

  Since the protrusions 13a to 13d are provided with the inclined surfaces 15a to 15d, the dimension in the vertical direction (optical axis direction) from the flange 14 to the protrusions 13a to 13d is the innermost diameter side of the protrusions 13a to 13d. Smallest and larger toward the outer diameter side.

  The vertical distance between the upper side surface of the flange 14 and the innermost diameter side of the protrusions 13a to 13d, that is, the vertical dimension of the winding surfaces 4a to 4d is the winding width when the coils 5 are aligned and wound ( (Dimension in the vertical direction). In addition, the vertical distance between the upper side surface of the flange 14 and the outermost diameter side of the protrusions 13a to 13d can be reliably wound even when the dimensional tolerance between the lens holder 4 and the coil wire is taken into consideration. Dimension that can be rotated. That is, the vertical distance between the upper side surface of the flange 14 and the outermost diameter side of the protrusions 13 a to 13 d is set to a dimension equal to or greater than the vertical width of the coil 5 + the dimensional tolerance of the lens holder 4. .

  Moreover, in this Embodiment, the inclined surfaces 15a-15d are formed except the edge part of the circumferential direction of protrusion part 13a-13d, and the main-body part of protrusion part 13a-13d is formed in the edge part of the circumferential direction. Are provided with second inclined surfaces 15e. Thereby, it can suppress that a coil wire is damaged at the time of winding. The second inclined surface 15e is not limited to a flat surface, but may be an R surface or other surface shape, and may be any shape as long as the coil wires are not easily damaged at the edges of the circumferential ends of the inclined surfaces 15a to 15d.

  The lens holder 4 of this embodiment is aligned and wound. Then, even if the vertical distance between the upper side surface of the flange 14 and the outermost diameter side of the protrusions 13a to 13d is small within the tolerance range, the coil wire is surely connected to the flange 14 and the protrusion. Between 13a-13d, it can almost be aligned.

  Even if the distance in the vertical direction between the upper side surface of the flange 14 and the outermost diameter side of the protrusions 13a to 13d is large within the tolerance range, the coil 5 moves on the winding surfaces 4a to 4d. There is almost no room to move. Therefore, it is possible to suppress the coil 5 from rattling in the optical axis direction. Thereby, the innermost diameter side of the inclined surfaces 15 a to 15 d can position the height position on the upper side of the coil 5.

  In addition, by providing a plurality of protrusions 13a to 13d at predetermined intervals in the circumferential direction, the vertical distance between the upper side surface of the flange 14 and the innermost diameter side of the protrusions 13a to 13d is a tolerance. Even if a small one can be made within the range, it can be easily aligned.

In this embodiment, a notch 24 is provided in the collar corresponding to the protrusions 13a to 13d. However, the protrusions 13a to 13d are formed at a predetermined interval in the circumferential direction of the lens holder 4, and the collar body part other than the notch 24 of the collar 14 is between the protrusions 13a to 13d. It is provided at a position corresponding to the circumferential interval. Therefore, even in the portion where the notch 24 is formed, the distance in the vertical direction between the position corresponding to the upper surface of the flange 14 and the innermost diameter side of the protrusions 13a to 13d is small within the tolerance range. Even if it can, it can be easily aligned winding.
Further, as shown in FIGS. 3 to 5, when viewed from the optical axis direction, the collar body portion other than the notch 24 of the collar 14 and the protrusions 13 a to 13 d do not overlap. That is, in the circumferential direction of the lens holder 4, there is no portion where the coil 5 is sandwiched between both the collar body portion and the protrusions 13a to 13d. As a result, the aligned winding can be more easily performed. Even if the dimension between the flange 14 and the innermost diameter side of the protrusions 13a to 13d can be reduced, the coil wire is not forcedly inserted between them, and the coil wire can escape to the space where the coil wire is vacant. Since it can be done, it is easy to arrange and wind.
Moreover, as shown in FIG. 3, the notch 24 is formed flush with the winding surface 4a. The cutout portion 24 may be recessed radially inward from the winding surface 4a. Since the cutout portion 24 does not protrude outward in the radial direction from the winding surface 4a, the cutout portion 24 can be manufactured using only the upper and lower molds when the lens holder 4 is manufactured. Therefore, the lens holder 4 can be easily manufactured.

  Therefore, according to this embodiment, it is possible to provide a lens holder that can simultaneously realize aligned winding and play in the optical axis direction.

  As shown in FIGS. 4 and 5, in the lens holder 4 of the present embodiment, the collar part 14 includes a collar inclination part 25 in which the upper side surface of the collar part 14 is inclined downward toward the notch part 24. ing. Further, a protrusion 26 protruding downward is provided on the flange 14 opposite to the flange inclined part 25 in the vertical direction.

  In winding the coil 5 around the lens holder 4, the coil wire is first hooked on the protrusion 26 and then introduced into the notch 24 from below the notch 24, and passes through the flange inclined part 25. To the upper side of the collar 14. The upper side surface of the flange portion 14 positions the height position on the lower side of the coil 5 wound around the outer periphery of the lens holder 4. By using the heel part inclined part 25 as an inclined part at the start of winding, the load at which the coil wire at the start of winding starts to be bent can be reduced, and the second row that goes around the outer periphery of the lens holder 4 can be entered straight. . As a result, the aligned winding can be performed more easily and more accurately.

  Next, aligned winding is performed in order from the inner peripheral side, and finally the coil wire is led from the notch 24 at another position to the lower part of the notch 24 and is hooked by the protrusion 26 at the position where the notch 24 is located. To finish.

  The protrusion 26 may protrude outward in the radial direction.

  Further, a winding adjustment jig of the winding device is inserted between the adjacent protrusions 13a to 13d to guide the coil wire between the winding surfaces 4a to 4d, or the winding width in the vertical direction of the coil 5 May be regulated.

  As described above, according to the lens holder 4 of the present embodiment, the height on the lower side of the coil 5 that protrudes outward in the radial direction from the outer peripheral wall 12 of the lens holder 4 and is wound around the outer periphery of the lens holder 4. A flange 14 for positioning the position and projections 13a to 13d that protrude outward from the outer peripheral wall 12 of the lens holder 4 in the radial direction are provided. The protrusions 13 a to 13 d include inclined surfaces 15 a to 15 d that are inclined downward from the outer side in the radial direction toward the inner side in the radial direction, and the innermost diameter side of the inclined surfaces 15 a to 15 d is the height on the upper side of the coil 5. The position is determined. Therefore, it is possible to provide a lens holder that can simultaneously realize aligned winding and play in the optical axis direction. The alignment winding is necessary for obtaining a stable thrust for performing position control such as focus. According to the lens holder of this embodiment, position control such as focus can be performed more stably. .

  Therefore, according to the voice coil motor type lens driving device 1 provided with the lens holder 4 of the present embodiment, the lens holder 4 can be moved more precisely, and the coil 5 is rattled during use. Therefore, it is possible to provide the lens driving device 1 that is less likely to cause the occurrence of the problem and can perform the position control such as the focus more stably.

  In addition, according to electronic devices such as a camera device such as an autofocus camera equipped with the lens driving device 1 of this embodiment, a mobile phone equipped with such a camera device, a multi-function mobile phone, etc. It is possible to provide an electronic device that can move the lens holder more precisely, is less prone to problems such as looseness of the coil 5 during use, and can perform position control such as focusing more stably. .

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments, and various modifications can be made within the technical scope grasped from the description of the claims. Can be changed.

DESCRIPTION OF SYMBOLS 1 Lens drive device 2 Frame 3 Yoke 4 Lens holder 5 Coil 6 Magnet 7 Front side spring 8 Rear side spring 9 Base 12 Outer peripheral wall 13a, 13b, 13c, 13d Projection part 14 Ridge part 15a, 15b, 15c, 15d Inclined surface 24 Cutting Notch 25 Inclined part of buttocks

The invention described in claim 1
A lens holder in a voice coil motor type lens driving device having a predetermined length in the vertical direction and having a coil wound around the outer periphery,
A flange that projects outward in the radial direction from the outer peripheral wall of the lens holder and positions a height position on the lower side of the coil wound around the outer periphery of the lens holder;
A protrusion projecting outward in the radial direction from the outer peripheral wall of the lens holder,
The protrusion has an inclined surface that is inclined downward from the outer side in the radial direction toward the inner side in the radial direction, and the dimension between the innermost diameter side of the inclined surface and the upper side surface of the flange portion is the same as that of the coil. The lens holder is characterized in that it coincides with the winding width when aligned winding is performed, and the innermost diameter side of the inclined surface positions the height position on the upper side of the coil.

Claims (6)

A lens holder in a voice coil motor type lens driving device having a predetermined length in the vertical direction and having a coil wound around the outer periphery,
A flange that projects outward in the radial direction from the outer peripheral wall of the lens holder and positions a height position on the lower side of the coil wound around the outer periphery of the lens holder;
A protrusion projecting outward in the radial direction from the outer peripheral wall of the lens holder,
The protrusion has an inclined surface that is inclined downward from the outer side in the radial direction toward the inner side in the radial direction, and the innermost diameter side of the inclined surface positions the height position on the upper side of the coil. Lens holder.   The lens holder according to claim 1, wherein a plurality of the protrusions are provided at predetermined intervals in the circumferential direction.   The lens holder according to claim 2, wherein a second inclined surface connected to a main body portion of the protruding portion is formed at an end portion in the circumferential direction of the inclined surface.   A voice coil motor type lens driving device comprising the lens holder according to claim 1.   A camera device comprising the lens driving device according to claim 4.   An electronic apparatus comprising the lens driving device according to claim 5.

Images