Vane drive device, camera device, and electronic device

Abstract

The present invention provides a blade driving device capable of supplying power to a coil located at a position away from the bottom surface. The blade driving device (1) includes: a fixing portion including a base (43); a first metal component (94) having an embedded portion (942) embedded in the base (43) and a standing portion (943) standing up from the embedded portion (942); a blade (11); a movable ring (22) supported rotatably relative to the fixing portion to move the blade (11) by rotation; a front coil substrate (20) and a rear coil substrate (40) fixed to the fixing portion and each embedded with a plurality of coils (121); a magnet (21) sandwiched between the front coil substrate (20) and the rear coil substrate (40) and fixed to the movable ring (22), and the front coil substrate (20) is electrically connected to the standing portion (943) of the first metal component (94). The present invention provides a camera device and an electronic device.

Description

Technical Field

[0001] The present invention relates to a vane drive device, a camera device, and an electronic device used in electronic devices such as smartphones. Background Art

[0002] Various techniques have been proposed for adjusting the amount of light incident on a lens body by sliding vanes of a camera device. The camera module disclosed in Patent Document 1 arranges three vanes around an entrance hole and drives these three vanes to change the amount of light incident on the lens body. This camera module arranges three drive coils on an FPC (Flexible Printed Circuits) on the bottom surface of a housing that holds the vanes, and arranges three drive magnets on a movable ring facing the housing. By the electromagnetic force generated by the drive coils and the drive magnets, the movable ring is rotated around the optical axis, thereby driving the vanes. The aperture mechanism device disclosed in Patent Document 2 arranges two substantially L-shaped vanes called blades facing each other around an entrance hole and drives these two vanes to change the amount of light incident on the lens body. This aperture mechanism device arranges three coils on an FPC on the bottom surface of a base, and arranges three permanent magnets on a rotating ring above the base. By the electromagnetic force generated by the coils and the permanent magnets respectively, the rotating ring is rotated around the optical axis, thereby driving the vanes.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Chinese Patent Publication No. 110858048A

[0006] Patent Document 2: Korean Patent Publication No. 2018-0105970A Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] However, the problems with the techniques described in Patent Documents 1 and 2 are that it is difficult to supply power to the coils when the coils are located at positions away from the substrate on the bottom surface.

[0009] The present invention has been completed in view of such problems, and an object thereof is to provide a vane drive device that can also supply power to coils located at positions away from the bottom surface.

[0010] Means for Solving the Problems

[0011] In order to solve the above problems, a blade driving device as a preferred embodiment of the present invention is characterized by comprising: a fixing part including a base; a metal component having an embedding part buried in the bottom surface of the base and a standing part standing forward from the embedding part; a blade; a movable ring supported in a rotatable manner relative to the fixing part, and the blade is moved by rotation; a front coil substrate and a rear coil substrate fixed to one of the fixing part and the movable ring, respectively embedded with a plurality of coils; and a magnet sandwiched between the front coil substrate and the rear coil substrate and fixed to the other of the fixing part and the movable ring, and the front coil substrate is electrically connected to the standing part of the metal component.

[0012] In this embodiment, it may also be that there is a circuit board disposed on the base, the front coil substrate is electrically connected to the circuit board via the metal component, and the rear coil substrate is directly electrically connected to the circuit board.

[0013] Alternatively, the front end of the standing part of the metal component may be soldered to the front coil substrate.

[0014] Alternatively, there may be a leaf spring connecting the metal component and the movable ring, the metal component is electrically connected to one end of the leaf spring, and the front coil substrate and the rear coil substrate fixed to the movable ring are electrically connected to the other end of the leaf spring.

[0015] Alternatively, there may be an FPC mounted on the movable ring and electrically connected to the leaf spring, and the front coil substrate and the rear coil substrate are electrically connected to the FPC.

[0016] Alternatively, the standing part of the metal component may stand from the inner peripheral end of the base.

[0017] A camera device as another preferred embodiment of the present invention is characterized by comprising the above-mentioned blade driving device.

[0018] An electronic device as another preferred embodiment of the present invention is characterized by comprising the above-mentioned camera device.

[0019] Effects of the Invention

[0020] The vane driving device of the present invention includes: a fixed part including a base; a metal part having an embedded part buried in the bottom surface of the base and a standing part standing forward from the embedded part; a vane; a movable ring rotatably supported relative to the fixed part and moving the vane by rotation; a front coil substrate and a rear coil substrate fixed to one of the fixed part and the movable ring and respectively embedded with a plurality of coils; and a magnet sandwiched between the front coil substrate and the rear coil substrate and fixed to the other of the fixed part and the movable ring, the front coil substrate being electrically connected to the standing part of the metal part. Thus, a vane driving device capable of supplying power to a coil located at a position away from the bottom surface can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a front view of a smartphone 9 equipped with a camera device 8 including a vane driving device 1 and a lens driving device 5 according to an embodiment of the present invention.

[0022] Figure 2 is Figure 1 a perspective view of the vane driving device 1 and the lens driving device 5.

[0023] Figure 3 is Figure 2 a perspective view of the vane driving device 1.

[0024] Figure 4 is Figure 3 a perspective view of the disassembled vane driving device 1.

[0025] Figure 5 is a view after removing the housing 10 from Figure 3 it.

[0026] Figure 6 is a view after removing the vane 11 from Figure 5 it.

[0027] Figure 7 is a view after removing the fixing plate 12 from Figure 6 it.

[0028] Figure 8 is a view after removing the front coil substrate 20 from Figure 7 it.

[0029] Figure 9 is a view after removing the movable ring 22 from Figure 8 it.

[0030] Figure 10 is a view showing Figure 9 the base 43 of it. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As Figure 1 shown, a camera device 8 including a blade driving device 1 as an embodiment of the present invention is housed in a smartphone 9.

[0032] The camera device 8 includes: a lens body 7; an image sensor 6 that converts light from the lens body 7 into an electrical signal; a lens driving device 5 that drives the lens body 7; and a blade driving device 1 that drives a blade 11 disposed on the front side of the lens body 7.

[0033] Hereinafter, the direction in which light from a subject is incident will be appropriately referred to as the Z direction, one direction orthogonal to the Z direction will be appropriately referred to as the X direction, and the direction orthogonal to both the Z direction and the X direction will be appropriately referred to as the Y direction. In addition, sometimes the +Z side on the subject side of the optical axis of the lens body 7 is referred to as the front side, and the -Z side on the side of the image sensor 6 opposite to the subject is referred to as the rear side. In addition, sometimes the +X side is referred to as the upper side, the -X side is referred to as the lower side, the +Y side is referred to as the left side, and the -Y side is referred to as the right side.

[0034] As Figure 2 shown, the lens driving device 5 has a lens carrier 70 inside, and the lens carrier 70 holds the lens body 7. On the +Y side and -Y side of the front surface of the lens carrier 70, there are provided metal carrier-side receiving portions 701 for supporting the blade driving device 1 and supplying power to the blade driving device 1. Corresponding blade-side receiving portions 953 and 963 are provided on the blade driving device 1. The blade driving device 1 is configured such that the optical axis of the lens body 7 becomes the center of the blade driving device 1. In order to be supported by the carrier-side receiving portions 701 and the blade-side receiving portions 953 and 963, the blade driving device 1 does not contact the lens body 7. The lens carrier 70 is supported so as to be movable at least in the optical axis direction of the lens body 7, and the blade driving device 1 moves together with the lens carrier 70 and the lens body 7.

[0035] As Figure 4 shown, the blade driving device 1 includes a housing 10, four blades 11, a fixing plate 12, a front-side coil substrate 20, four magnets 21, a movable ring 22, four plate springs 30, a rear-side coil substrate 40, a circuit substrate 41, a Hall IC 42, and a base 43. Among them, the housing 10, the fixing plate 12, the front-side coil substrate 20, the rear-side coil substrate 40, the circuit substrate 41, the Hall IC 42, and the base 43 constitute a fixed portion that does not move relative to the lens carrier 70.

[0036] The housing 10 is annular. The blades 11 are flat plates, and four blades 11 are arranged in a cycle. At the portion that protrudes substantially in a rectangular shape at the outer edge of the blade 11, a fixing hole 113 and a movable hole 114 are provided. The fixing hole 113 is circular. The movable hole 114 has a shape that stretches the circle in the direction of its diameter. An opening is formed on the inner peripheral side of the four blades 11, and by rotating the blade 11 around the fixing hole 113, the size of the opening is controlled to control the amount of light that travels from the subject through the lens body 7 to the image sensor 6.

[0037] The fixing plate 12 has a disk portion 127, an inner peripheral wall portion 128, and an outer peripheral wall portion 129. At positions on the outer peripheral edges of the disk portion 127 near the +X side, -X side, +Y side, and -Y side, fixing pins 123 and long holes 124 are respectively provided. The fixing pins 123 and the long holes 124 are arranged close to the tangential direction of the circle, and the long holes 124 extend along the tangential direction of the circumference. In addition, holes 125 are respectively provided on the inner peripheral edges of the disk portion 127 at the +X+Y side and the +X-Y side. The inner peripheral wall portion 128 and the outer peripheral wall portion 129 extend from the inner peripheral edge and the outer peripheral edge of the disk portion 127 toward the -Z side. Cuts 120 are provided on the +Y side and the -Y side at the rear end of the outer peripheral wall portion 129.

[0038] The front coil substrate 20 is annular. Two coils 121 are respectively embedded on the +X side, -X side, +Y side, and -Y side of the through hole at the center of the front coil substrate 20. The two coils 121 arranged on the +X side and the -X side have straight portions that are arranged side by side in the Y direction and extend along the Y direction respectively. The two coils 121 arranged on the +Y side and the -Y side have straight portions that are arranged side by side in the X direction and extend along the X direction respectively. The eight coils 121 are arranged side by side at the same height. Connection portions 201 are provided at positions on the inner peripheral edge of the front coil substrate 20 at the +X+Y side and the +X-Y side. The two connection portions 201 are electrically connected to each other via the respective coils 121 arranged in the front coil substrate 20.

[0039] The movable ring 22 is annular. On the +X side, -X side, +Y side, and -Y side of the inner peripheral wall of the movable ring 22, there are recesses 220 that are recessed toward the outer peripheral side. Magnets 21 are respectively received and fixed in the recesses 220 on the +X side, -X side, +Y side, and -Y side. The magnets 21 are magnetized in such a way that opposite magnetic poles are formed in the inner peripheral side half and the outer peripheral side half along the front-rear direction.

[0040] On the +X side, -X side, +Y side, and -Y side of the outer peripheral edge in front of the movable ring 22, there are projecting portions 222 that project forward respectively. On each projecting portion 222, there is also a movable pin 224 that projects forward. On the +X+Y side, +X-Y side, -X+Y side, and -X-Y side of the inner peripheral wall of the movable ring 22, that is, between the recessed portions 220, there are gaps 223 respectively. The gaps 223 are recessed toward the outer side in the radial direction of the movable ring 22.

[0041] The leaf spring 30 has two plate-like portions and a wrist portion that is elastically connected to the two plate-like portions. The wrist portion is composed of a linear and zigzag elastic member.

[0042] The rear coil substrate 40 is annular. On the +X side, -X side, +Y side, and -Y side of the through hole at the center of the rear coil substrate 40, two coils 121 are respectively embedded. On the +X side and -X side, the two coils 121 arranged have straight portions that are arranged side by side along the Y direction and extend along the Y direction respectively. On the +Y side and -Y side, the two coils 121 arranged have straight portions that are arranged side by side along the X direction and extend along the X direction respectively. The eight coils 121 are arranged side by side at the same height. At the position of the +X+Y side of the inner peripheral edge of the rear coil substrate 40, that is, at the position between the -X side coil 121 and the +Y side coil 121, there is a rectangular cutout 401. On the +X side of the outer peripheral edge of the rear coil substrate 40, there are two connection portions (not shown). The two connection portions are electrically connected to each other via each coil 121 arranged in the rear coil substrate 40.

[0043] The circuit board 41 is annular. At the position on the front surface of the circuit board 41 corresponding to the cutout 401 on the -X+Y side, the Hall IC 42 is fixed. The Hall IC 42 is a magnetic position sensor. At the position on the circuit board 41 where the Hall IC 42 is fixed, there are six connection portions (not shown). The six connection portions are electrically connected to the six contacts of the Hall IC 42.

[0044] On the +X side of the outer peripheral edge of the circuit board 41, there are two connection portions (not shown). On the +Y side and -Y side of the rear surface of the circuit board 41, there are three connection portions (not shown) respectively.

[0045] For the base 43, the body of the base 43 is resin, and it is insert-molded in a state where two first metal members 94, two second metal members 95, and two third metal members 96 are embedded in the resin.

[0046] The base 43 has an annular bottom surface. On the +X+Y side, +X-Y side, -X+Y side, and -X-Y side of the inner peripheral edge surrounding the central through hole in the base 43, there are column portions 431 that stand up toward the +Z side. On the +Y side and -Y side of the base 43, there are three holes 434 respectively. The three holes 434 are arranged side by side in the X direction.

[0047] Each first metal component 94 has: an exposed portion 941 that is hook-shaped and exposed in the front and rear of the hole 434 on the +X side; a buried portion 942 that projects from the exposed portion 941 toward the +X side in a buried state, bends and extends to the nearest column portion 431; and an erected portion 943 that stands on the column portion 431 and extends forward along the column portion 431. The front end portion of the erected portion 943 projects and is exposed to the front of the leading edge of the column portion 431.

[0048] Each second metal component 95 has: an exposed portion 951 that is hook-shaped and exposed in the front and rear of the middle hole 434; a buried portion 952 that extends from the exposed portion 951 toward the outer peripheral side in a buried state; and a blade-side receiving portion 953 that stands stepwise at the front end of the buried portion 952 and then projects to the outside of the outer edge of the base 43.

[0049] Each third metal component 96 has: an exposed portion 961 that is hook-shaped and exposed in the front and rear of the hole 434 on the -X side; a buried portion 962 that extends from the exposed portion 961 toward the outer peripheral side in a buried state; and a blade-side receiving portion 963 that stands stepwise at the front end of the buried portion 962 and then projects to the outside of the outer edge of the base 43.

[0050] The erected portions of the blade-side receiving portions 953 and 963 are covered by a horizontally long thin plate portion 439 in the X direction, and the blade-side receiving portions 953 and 963 project outward from the side surface of the thin plate portion 439.

[0051] The blade driving device 1 is manufactured in the following manner.

[0052] On the front surface of the base 43, the circuit board 41 is fixed. The exposed portions 941, 951, and 961 on the +Y side and the exposed portions 941, 951, and 961 on the -Y side of the base 43 are respectively soldered to three wiring portions on the +Y side and three wiring portions on the -Y side of the circuit board 41.

[0053] The rear side coil board 40 is fixed to the front of the circuit board 41. The Hall IC 42 on the circuit board 41 is received in the cutout 401 on the -X+Y side of the rear side coil board 40. Two wiring portions on the +X side of the circuit board 41 are respectively soldered to two wiring portions on the +X side of the rear side coil board 40. The erected portion 943 of the first metal component 94 of the base 43 extends through the edge of the through hole of the circuit board 41 to the front side.

[0054] On the outer peripheral side of the four column portions 431 of the base 43, the movable ring 22 is supported in the air via four plate springs 30. The plate-like portion on the inner peripheral side of the plate spring 30 is fixed to the side surface of the column portion 431. The outer peripheral side plate-like portion of the plate spring 30 is inserted into and fixed to the slit 223 of the movable ring 22. The front end portion of the erected portion 943 of the first metal member 94 of the base 43 is soldered to the wiring portion 201 of the front side coil substrate 20.

[0055] The front side coil substrate 20 is pre-fixed to the rear surface of the disk portion 127 of the fixing plate 12. Thus, the lower edges of the inner peripheral wall portion 128 and the outer peripheral wall portion 129 of the fixing plate 12 are fixed to the inner peripheral edge and the outer peripheral edge of the base 43. The wiring portion 201 of the front side coil substrate 20 is soldered and electrically connected to the front end portion of the erected portion 943 of the first metal member 94 of the base 43 via the hole 125. As Figure 6 shown, the blade side receiving portions 953 and 963 of the base 43 are exposed to the outer peripheral side through the cutout 120 of the fixing plate 12.

[0056] The front side coil substrate 20, the movable ring 22, the rear side coil substrate 40, and the circuit substrate 41 are housed in the annular space formed between the inner peripheral wall portion 128 and the outer peripheral wall portion 129 of the fixing plate 12. In this annular space, the coils 121 on the +X side, -X side, +Y side, and -Y side of the front side coil substrate 20 and the rear side coil substrate 40 face each other with the magnets 21 on the X side, -X side, +Y side, and -Y side interposed therebetween.

[0057] The Hall IC 42 is housed in the cutout 401 on the -X + Y side of the rear side coil substrate 40. The Hall IC 42 is located at the angular position between the -X side group and the +Y side group among the four groups formed by the magnet 21 and the front and rear coils 121. On the front side of the Hall IC 42, there is a plate spring 30 on the -X + Y side. The six contacts of the Hall IC 42 are electrically connected to the six wiring portions on the front surface of the circuit substrate 41.

[0058] As Figure 6 shown, the movable pin 224 of the movable ring 22 passes through the long hole 124 of the fixing plate 12 and projects forward. Thus, as Figure 5 shown, the fixing pin 123 of the fixing plate 12 is inserted into the fixing hole 113 of the blade 11, and the movable pin 224 is inserted into the movable hole 114 of the blade 11. The housing 10 is fixed to the outer peripheral edge of the disk portion 127 of the fixing plate 12.

[0059] As Figure 2As shown, the blade-side receiving portions 953 and 963 protruding from the +Y side and -Y side cutouts 120 of the blade driving device 1 are respectively placed on the front end portions of the two carrier-side receiving portions 701 on the +Y side and -Y side of the lens carrier 70. The carrier-side receiving portion 701 and the blade-side receiving portions 953 and 963 are fixed and electrically connected by welding or soldering.

[0060] The Hall IC 42 connected to the carrier-side receiving portion 701 senses the magnetic field of the magnet 21 to detect the position of the magnet 21 relative to the Hall IC 42 in the rotational direction, and based on the result, outputs the current supplied to the supply coil 121. When current is supplied to the coils 121 of the front coil substrate 20 and the rear coil substrate 40 of the blade driving device 1, the electromagnetic force generated by the coil 121 and the magnet 21 is used to generate a thrust in the optical axis direction. Using this thrust, the movable ring 22 rotates relative to the fixed plate 12. Along with this rotation, the movable pin 224 of the movable ring 22 moves within the movable hole 114 of the blade 11, and the blade 11 rotates around the axis of the fixed pin 123 embedded in the fixed hole 113.

[0061] The above are the details of this embodiment. The blade driving device 1 in this embodiment includes: a fixing portion, which includes a base 43; a buried portion 942 buried in the bottom surface of the base 43;

[0062] and a metal component 94 including a standing portion 943 standing forward from the buried portion 942;

[0063] A first metal component 94, which has a buried portion 942 buried in the base 43 and a standing portion 943 standing from the buried portion 942; a blade 11; a movable ring 22, which is supported in a rotatable form relative to the fixing portion and moves the blade 11 by rotation; a front coil substrate 20 and a rear coil substrate 40, which are fixed to the fixing portion and respectively buried with a plurality of coils 121; and a magnet 21, which is clamped by the front coil substrate 20 and the rear coil substrate 40 and fixed to the movable ring 22, and the front coil substrate 20 is electrically connected to the standing portion 943 of the first metal component 94. Thus, a blade driving device 1 that can also supply power to the coil 121 located at a position away from the bottom surface can be provided.

[0064] In addition, in the above-described embodiment, it is also possible that the coil is fixed to the movable ring 22 and the magnet is fixed to the fixed plate 12. In this case, in order for the coil, which is the object of current supply, to move together with the movable ring 22, the leaf spring disposed between the first metal member 94 on the base 43 and the movable ring 22 can be utilized as an electrical connection component. It is only necessary that the first metal member 94 is electrically connected to the plate portion of the leaf spring on the inner peripheral side, and the front coil substrate 20 and the rear coil substrate 40 are electrically connected to the plate portion of the leaf spring on the outer peripheral side. Further, at this time, an FPC mounted on the movable ring 22 and electrically connected to the leaf spring is provided, and it is only necessary that the front coil substrate 20 and the rear coil substrate 40 are electrically connected to the FPC.

[0065] In addition, in the above-described embodiment, the number of sets of the magnet 21 and the coil 121 may be 2 sets, 3 sets, or 5 sets or more.

[0066] Reference Signs:

[0067] 1 Vane driving device; 5 Lens driving device; 6 Image sensor; 7 Lens body; 8 Camera device; 9 Smart phone; 10 Housing; 11 Vane; 12 Fixed plate; 20 Front coil substrate; 21 Magnet; 22 Movable ring; 30 Leaf spring; 40 Rear coil substrate; 41 Circuit board; 42 Hall IC; 43 Base; 70 Lens carrier; 94 First metal member; 95 Second metal member; 96 Third metal member; 113 Fixing hole; 114 Movable hole; 120, 401 Cutout; 121 Coil; 123 Fixing pin; 124 Long hole; 125 Hole; 127 Disk portion; 128 Inner peripheral wall portion; 129 Outer peripheral wall portion; 201 Wiring portion; 220 Recess; 222 Table portion; 223 Gap; 224 Movable pin; 431 Column portion; 434 Hole; 439 Thin plate portion; 701 Carrier side receiving portion; 941, 951, 961 Exposed portion; 942, 952, 962 Buried portion; 943 Upright portion; 953, 963 Vane side receiving portion.

Claims

1. A blade driving device, characterized in that, Comprising: A fixing part including a base; A metal component having an embedded part embedded in the bottom surface of the base and a standing part standing forward from the embedded part; A blade; A movable ring supported in a rotatable form relative to the fixing part, and the blade is moved by rotation; A front coil substrate and a rear coil substrate fixed to one of the fixing part and the movable ring, respectively embedded with a plurality of coils; And A magnet sandwiched between the front coil substrate and the rear coil substrate and fixed to the other of the fixing part and the movable ring, The front coil substrate is electrically connected to the standing part of the metal component.

2. The blade driving device according to claim 1, characterized in that There is a circuit board disposed on the base, The front coil substrate is electrically connected to the circuit board via the metal component, and the rear coil substrate is directly electrically connected to the circuit board.

3. The blade driving device according to claim 1, characterized in that The front end of the standing part of the metal component is soldered to the front coil substrate.

4. The blade driving device according to claim 1, characterized in that There is a leaf spring connecting the metal component and the movable ring, the metal component is electrically connected to one end of the leaf spring, and the front coil substrate and the rear coil substrate fixed to the movable ring are electrically connected to the other end of the leaf spring.

5. The blade driving device according to claim 4, characterized in that There is an FPC mounted on the movable ring and electrically connected to the leaf spring, and the front coil substrate and the rear coil substrate are electrically connected to the FPC.

6. The blade driving device according to claim 1, characterized in that The standing part of the metal component stands from the inner peripheral end of the base.

7. A camera device, characterized in that, Comprising the blade driving device according to any one of claims 1 to 6.

8. An electronic device, characterized in that, Comprising the camera device according to claim 7.

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