JP2019070739A - Blade driving device, imaging device, and electronic apparatus - Google Patents

Abstract

To provide a blade driving device with which it is possible to suppress variation in the performance of an imaging device, and which is installable in a limited space.SOLUTION: A blade driving device 1 comprises: a bottom plate part 3 having an opening 1A; a fist blade member 50 in which an engaging hole 58 is formed; a second blade member 60 in which an engaging hole 68 is formed; and a lever 4 having a first drive pin 35 that engages with the engaging hole 58 and a second drive pin 36 that engages with the engaging hole 68. The lever 4 is constituted so as to move the blade members 50, 60 by moving the drive pins 35, 36 to the bottom plate part 3 and change the size of the opening 1A. The blade driving device 1 further includes a wire spring 95, fixed to a surface 50A of the first blade member 50, for pressing the first drive pin 35 against an edge of the engaging hole 58.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a blade driving device, an imaging device, and an electronic device, and more particularly to a blade driving device for driving a blade member such as a diaphragm blade or a shutter blade in an imaging device.

  An imaging device such as a camera often incorporates a blade driving device that drives blade members such as a diaphragm blade and a shutter blade to perform a diaphragm operation, a shutter operation, and the like. In such a blade drive device, the drive pin of the drive member is engaged with the engagement hole of the blade member, and the blade member is moved by driving the drive member. In such a mechanism, the moving direction of the drive pin and the moving direction of the blade are often different, and in such a case, the blade member needs to move relative to the drive pin. A gap is formed between the inner peripheral wall of the engagement hole and the drive pin. When such a gap is large, the engagement between the engagement hole of the blade member and the drive pin becomes inaccurate, and the driving accuracy of the blade member becomes unstable.

  In order to solve such a problem, a method has been proposed in which a torsion coil spring is provided on the shaft of the base plate to which the blade member is attached, and the blade member is biased toward the drive pin by this torsion coil spring (for example, patent document 1). However, in this method, since it is necessary to provide a torsion coil spring across the ground plate and the blade members, a space for the torsion coil spring must be secured between the ground plate and the blade members. Therefore, there is a problem that it is difficult to apply to a small-sized electronic device with limited space such as a smartphone.

Unexamined-Japanese-Patent No. 2015-222392

  The present invention has been made in view of the problems of the prior art as described above, and it is an object of the present invention to provide a blade driving device capable of driving a blade member with high accuracy and being able to be installed in a limited space. The purpose of 1.

  The second object of the present invention is to provide an imaging device with good optical characteristics.

  Furthermore, a third object of the present invention is to provide an electronic apparatus including an imaging device with good optical characteristics.

  According to a first aspect of the present invention, there is provided a blade driving device capable of driving a blade member with high accuracy and capable of being installed in a limited space. The blade drive device has a base plate portion, a blade member configured to be movable with respect to the base plate portion and having an engagement hole formed therein, and a drive portion engaged with the engagement hole of the blade member. A driving member for moving the blade member by moving the driving portion relative to the base plate portion, and a drive member fixed to the front surface or the back surface of the blade member, the driving portion of the driving member being an edge of the engagement hole And a biasing member for pressing the part.

  According to the blade drive device according to the present invention, when moving the blade member by the drive member, the drive member of the drive member is always pressed against the edge of the engagement hole of the blade member by the biasing member. Therefore, when the drive unit moves, rattling of the drive unit in the engagement hole of the blade member is suppressed. Therefore, the blade member can be driven accurately by the driving member. Further, the mechanism for suppressing rattling in the engagement hole of the drive part can be realized only by fixing the biasing member on the front surface or the back surface of the blade member. There is no need to provide a member straddling the gap, and the apparatus can be thinned. Therefore, the blade drive device according to the present invention can be installed in a limited space.

  Here, preferably, the biasing member is configured to bias the drive portion of the drive member in the moving direction of the blade member. With such a configuration, rattling of the drive unit in the moving direction of the blade member can be effectively suppressed.

  The biasing member may include a fixing portion fixed to the blade member, and a contact portion extending from the fixing portion toward the driving portion and contacting the driving portion.

  Alternatively, the biasing member is connected to the fixed portion fixed to the blade member, an intermediate portion extending in the first direction from the fixed portion, and the intermediate portion, the second portion being different from the first direction. And a contact portion extending toward and in contact with the drive along the direction of. By configuring the biasing member in this manner, the fixing portion of the biasing member can be brought closer to the drive portion, so that the biasing force of the biasing member can be increased. The rattling can be suppressed more effectively.

  The biasing member may be constituted by a wire spring, a leaf spring, or a spring such as a torsion coil spring. When a flat spring is used, the contact portion between the biasing member and the drive portion can be in surface contact, so that the biasing force of the biasing member can be increased. Can be more effectively suppressed. Further, since the contact portion between the biasing member and the driving portion is surface contact, the durability of the biasing member is also improved. When a torsion coil spring is used, it is possible to adjust the biasing force of the biasing member by changing the number of turns of the coil.

  Here, it is preferable that the biasing member be fixed to the front surface or the back surface of the blade member by an adhesive. Thus, the blade driving device can be effectively thinned, and the throughput of the manufacturing process can be improved.

  According to a second aspect of the present invention, an imaging device with good optical characteristics is provided. The imaging device is disposed on a surface on which at least one lens, the blade driving device disposed on the optical axis of the at least one lens, and light transmitted through the at least one lens form an image. And an imaging element.

  According to the third aspect of the present invention, there is provided an electronic device exhibiting stable optical performance. The electronic device includes the imaging device described above.

  According to the blade drive device of the present invention, the blade member can be driven with high precision by the drive member, and can be installed in a limited space.

FIG. 1 is a perspective view showing a smartphone incorporating an imaging device according to an embodiment of the present invention. FIG. 2 is a perspective view showing a lens module in the imaging device shown in FIG. FIG. 3 is an exploded perspective view of the lens module shown in FIG. FIG. 4 is a front view showing a blade driving device in the first embodiment of the present invention. FIG. 5 is an exploded perspective view of the blade driving device shown in FIG. FIG. 6 is a front view showing a state in which the cover portion is removed from the blade driving device shown in FIG. FIG. 7 is a front view showing a state in which the lever is driven in the blade driving device shown in FIG. FIG. 8 is a front view showing a state in which the cover portion is removed from the blade driving device in the second embodiment of the present invention. FIG. 9 is a perspective view showing a blade driving device according to a third embodiment of the present invention with the cover removed. FIG. 10 is a perspective view showing a blade driving device according to a fourth embodiment of the present invention with the cover removed.

  Hereinafter, embodiments of an electronic device including a blade driving device according to the present invention will be described in detail with reference to FIGS. 1 to 10. Note that, in FIG. 1 to FIG. 10, the same or corresponding components are given the same reference numerals, and duplicate explanations are omitted. Further, in FIGS. 1 to 10, the scale and dimensions of each component may be exaggerated and shown, or some components may be omitted.

  FIG. 1 is a perspective view showing a smartphone 101 as an example of an electronic device according to the present invention, and a camera 102 as an imaging device according to the present invention is incorporated inside the smartphone 101. As shown in FIG. 1, the camera 102 includes a lens module 103 embedded on the back of the smartphone 101, and an imaging device (not shown) disposed on an imaging surface on which light transmitted through the lens module 103 forms an image. Is equipped. The electronic device according to the present invention is not limited to the smart phone as described in the present embodiment, and the present invention can be applied to various electronic devices such as a tablet computer, a laptop computer, and a drone. .

  FIG. 2 is a perspective view showing the lens module 103, and FIG. 3 is an exploded perspective view. As shown in FIGS. 2 and 3, the lens module 103 includes a lens holder 110 for holding one or more lenses 104, a blade drive device 1 for driving the diaphragm blade (blade member), the lens holder 110 and the blade drive. And a stopper 114 attached to the device 1. As shown in FIG. 3, the blade driving device 1 in the present embodiment has an insertion portion 17 in which a blade member is accommodated, and the insertion portion 17 can be inserted into the lens holder 110. ing. The insertion portion 17 is formed with an opening 1A through which light transmitted through the lens 104 passes. In the present specification, the object side may be referred to as “front” or “front” along the optical axis (X axis) of the lens module 103, and the imaging surface side may be referred to as “rear” or “rear”. In addition, in FIG.2 and FIG.3, the blade drive device 1 is shown typically.

  FIG. 4 is a front view showing the blade drive device 1 according to the first embodiment of the present invention, and FIG. 5 is an exploded perspective view of the blade drive device 1. The blade drive device 1 can drive the diaphragm blade based on the drive signal to automatically perform the diaphragm operation. As shown in FIGS. 4 and 5, the main plate 3 and the front of the main plate 3 can be operated. And a lever (drive member) 4 for moving the blade members 50 and 60, and a cover 5 for covering the blade members 50 and 60 in front of the blade members 50 and 60. ing.

  As shown in FIG. 5, the base plate 3 includes a base member 10, two yokes 21, a substrate coil 33 having two coil patterns 33 A printed on the inner layer of the substrate, and a blade attached to the surface of the base member 10. A presser 40 and a flexible printed circuit board 20 disposed on the back surface of the base member 10 are included.

  On the surface of the base member 10, a fixed shaft 11 for fixing the cover 5, a rotating shaft 12 for rotating the lever 4, and a guide for moving the first blade member 50 in the Z direction A shaft 15 and a guide shaft 16 for moving the second blade member 60 in the Z direction are formed. Each of the shafts 11, 12, 15, 16 extends from the surface of the base member 10 in the -X direction. The end 23 of the flexible printed circuit board 20 is bent upward, and the bent end 23 is disposed on the surface side of the base member 10 through a notch 18 formed in the lower portion of the base member 10.

  The substrate coil 33 of the ground plate 3 is formed with a through hole 22 through which the pivot shaft 12 of the base member 10 is inserted. A yoke 21 is disposed behind the substrate coil 33. The coil pattern 33A of the substrate coil 33 is connected to a circuit for supplying a drive signal via the flexible printed circuit 20.

  The blade presser 40 of the base plate 3 has an extending portion 43 extending from the central portion in the + Z direction. In the extension portion 43, a circular opening 47 that constitutes the above-described opening 1A is formed. Further, the blade holder 40 has a through hole 41 through which the fixed shaft 11 of the base member 10 is inserted, a through hole 45 through which the guide shaft 15 is inserted, a through hole 46 through which the guide shaft 16 is inserted, and rotation. A through hole 42 through which the shaft 12 is inserted is formed. Further, elongated holes 48 and 49 are formed in the vicinity of the end portion on the + Y direction side and the −Z direction side of the blade holder 40 and in the vicinity of the end portion on the −Y direction side and the −Z direction side.

  The lever 4 is disposed between the substrate coil 33 and the blade holder 40, and includes a lever body 30 and two magnets 31 attached to the lever body 30. The two magnets 31 of the lever 4 constitute a voice coil motor (VCM) together with the coil pattern 33A of the substrate coil 33. The lever main body 30 includes a first drive pin (drive portion) 35 extending in the −X direction from the vicinity of the end on the + Y direction side of the lever main body 30, and the vicinity of the end in the −Y direction side of the lever main body 30 And a second drive pin (drive portion) 36 extending in At substantially the center of the lever 4 in the Y direction, a through hole 32 through which the pivot shaft 12 of the base member 10 is inserted is formed. The blade drive device 1 in this embodiment is configured to rotate the lever 4 around the pivot shaft 12 using the VCM as an actuator.

  As shown in FIGS. 4 and 5, the cover 5 is formed to have substantially the same outer shape and dimensions as the base plate 3 in a front view, and includes a side plate 70 and a cover main body 80. In the side plate 70, an opening 77 having a diameter smaller than the diameter of the opening 47 of the blade holder 40, a through hole 71 through which the fixed shaft 11 of the base member 10 is inserted, and a pivot 12 of the base member 10 are inserted. A through hole 72 is formed, an elongated hole 78 corresponding to the elongated hole 48 of the blade presser 40 and an elongated hole 79 corresponding to the elongated hole 49 of the blade presser 40 are formed. Further, in the cover main body 80, a fitting hole 81 in which the fixed shaft 11 of the base member 10 is fitted, a fitting hole 82 in which the pivot shaft 12 of the base member 10 is fitted, A long hole 88 corresponding to the long hole 89 and a long hole 89 corresponding to the long hole 49 of the blade retainer 40 are formed.

  The first blade member 50 and the second blade member 60 are formed in a substantially U-shape with substantially line symmetry, and the first blade member 50 is aft (a side close to the ground plate 3), a second blade The member 60 is located on the front side (the side far from the main plate 3). Recesses are respectively formed on the front surface of the blade holder 40 and the rear surface of the side plate 70. When the blade holder 40 and the side plate 70 are superimposed, a blade accommodation space is formed between the blade holder 40 and the side plate 70. It is supposed to be The wing members 50 and 60 are housed in the wing housing space.

  The first blade member 50 has two guide grooves 55 through which the guide shaft 15 of the base member 10 is inserted, an engagement hole 58 with which the first drive pin 35 of the lever 4 engages, and the blade presser 40. A throttle hole 57 capable of communicating with the opening 47 and the opening 77 of the side plate 70 is formed. The guide groove 55 is formed as an elongated hole extending in the Z direction, and the engagement hole 58 is formed to allow movement of the first drive pin 35 of the lever 4. The aperture hole 57 includes a circular portion 57A slightly larger in diameter than the opening 47 of the blade holder 40, and an extension portion 57B extending in the -Z direction from the edge on the -Z direction side of the circular portion 57A. .

  The second blade member 60 includes two guide grooves 66 through which the guide shaft 16 of the base member 10 is inserted, an engagement hole 68 with which the second drive pin 36 of the lever 4 is engaged, and A throttle hole 67 capable of communicating with the opening 47 and the opening 77 of the side plate 70 is formed. The guide groove 66 is formed as a long hole extending in the Z direction, and the engagement hole 68 is formed to allow movement of the second drive pin 36 of the lever 4. The aperture hole 67 includes a circular portion 67A slightly larger in diameter than the opening 47 of the blade holder 40, and an extension portion 67B extending in the + Z direction from the edge on the + Z direction side of the circular portion 67A.

  As shown in FIGS. 4 and 5, the fixed shaft 11 of the base member 10 is inserted into the through hole 41 of the blade holder 40 and the through hole 71 of the side plate 70 and fitted into the fitting hole 81 of the cover main body 80. . Further, the pivot shaft 12 of the base member 10 is inserted through the through hole 22 of the substrate coil 33, the through hole 32 of the lever 4, the through hole 42 of the blade holder 40, and the through hole 72 of the side plate 70. The fitting hole 82 is fitted. Thus, the cover 5 is fixed to the main plate 3 in a state in which the blade members 50 and 60 are accommodated between the blade holder 40 and the side plate 70.

  6 shows a state in which the cover 5 is removed from the blade driving device 1 shown in FIG. As shown in FIGS. 5 and 6, the guide shaft 15 of the base member 10 is inserted through the through hole 45 of the blade holder 40 and the guide groove 55 of the first blade member 50, and the guide groove of the first blade member 50. 55 is to be engaged. Further, the guide shaft 16 of the base member 10 is inserted into the through hole 46 of the blade holder 40 and the guide groove 66 of the second blade member 60 so as to engage with the guide groove 66 of the second blade member 60. ing.

  The first drive pin 35 of the lever 4 is inserted into the long hole 48 of the blade holder 40, the engagement hole 58 of the first blade member 50, the long hole 78 of the side plate 70, and the long hole 88 of the cover body 80. There is. The first drive pin 35 is engaged with the engagement hole 58 of the first blade member 50. Further, the second drive pin 36 of the lever 4 is inserted into the long hole 49 of the blade holder 40, the engagement hole 68 of the second blade member 60, the long hole 79 of the side plate 70, and the long hole 89 of the cover main body 80. It is done. The second drive pin 36 is engaged with the engagement hole 68 of the second blade member 60.

  As shown in FIG. 6, a wire spring (biasing member) 95 is provided on the surface 50 </ b> A of the first blade member 50. The wire spring 95 is in contact with the first drive pin 35 of the lever 4 engaged with the engagement hole 58 of the first blade member 50, and in the example shown in FIG. It is biased in the direction. The wire spring 95 has a fixed portion 91 fixed to the surface 50 A of the first blade member 50 and a contact portion 92 extending from the fixed portion 91 toward the first drive pin 35 of the lever 4. The fixing portion 91 of the wire spring 95 is fixed to the first blade member 50 by, for example, a resin such as a UV curing resin. The wire spring 95 is in contact with the first drive pin 35 near the tip of the contact portion 92, and biases the first drive pin 35 in the -Z direction to thereby make the first drive pin 35 the first. The edge of the engagement hole 58 of the blade member 50 is pressed.

  Similarly, a wire spring (biasing member) 96 is provided on the rear surface of the second blade member 60. The wire spring 96 is in contact with the second drive pin 36 of the lever 4 engaged with the engagement hole 68 of the second blade member 60. In the example shown in FIG. 6, the second drive pin 36 is in the + Z direction. I am biased. The wire spring 96 has a fixing portion 93 fixed to the rear surface of the second blade member 60 and a contact portion 94 extending from the fixing portion 93 toward the second drive pin 36 of the lever 4. The fixing portion 93 of the wire spring 96 is fixed to the second blade member 60 by, for example, a resin such as a UV curing resin. The wire spring 96 is in contact with the second drive pin 36 in the vicinity of the tip of the contact portion 94, and biases the second drive pin 36 in the + Z direction to thereby move the second drive pin 36 to the second blade. The edge of the engagement hole 68 of the member 60 is pressed.

  The guide grooves 55 of the first blade member 50 extend in the Z direction, and the width in the Y direction is formed to be substantially equal to the outer diameter of the guide shaft 15 of the base member 10. The engagement between the guide shaft 15 and the guide groove 55 allows the first blade member 50 to move in the Z direction. Similarly, the guide grooves 66 of the second blade member 60 extend in the Z direction, and the length in the Y direction is formed to be substantially equal to the outer diameter of the guide shaft 16 of the base member 10. The engagement between the guide shaft 16 and the guide groove 66 allows the second blade member 60 to move in the Z direction.

  As described above, since the first drive pin 35 of the lever 4 is engaged with the engagement hole 58 of the first blade member 50, the first blade member 50 is a first driven member by the drive of the lever 4. As the drive pin 35 rotates around the rotation axis 12, it moves in the + Z direction with respect to the main plate 3. Similarly, since the second drive pin 36 of the lever 4 is engaged with the engagement hole 68 of the second blade member 60, the second blade member 60 is a second drive pin driven by the lever 4. The main plate 3 is adapted to move in the -Z direction with rotation around the pivot shaft 12 of 36.

  In the state of FIG. 6, when a drive signal is sent to the substrate coil 33, a predetermined current flows in the coil pattern 33A to generate a magnetic field, and the interaction between this magnetic field and the magnet 31 of the lever 4 makes the lever 4 counterclockwise. Rotate. Along with this, the first drive pin 35 rotates counterclockwise around the pivot shaft 12, but as described above, since the wire spring 95 biases the first drive pin 35, the wire spring 95 The force is transmitted to the first blade member 50 via the first blade member 50, and the first blade member 50 moves in the + Z direction by the engagement between the guide shaft 15 and the guide groove 55 described above. Also, although the second drive pin 36 rotates counterclockwise around the pivot shaft 12, the wire spring 96 biases the second drive pin 36, so that the second blade via the wire spring 96. The force is transmitted to the member 60, and the second blade member 60 moves in the -Z direction by the engagement of the guide shaft 16 and the guide groove 66 described above.

  Here, while the first blade member 50 and the second blade member 60 move from the state of FIG. 6 until the state of FIG. Since the first drive pin 35 is pressed against the edge of the engagement hole 58 of the blade member 50, rattling of the first drive pin 35 in the engagement hole 58 is suppressed. Further, since the second drive pin 36 is also always pressed against the edge of the engagement hole 59 of the second blade member 60 by the wire spring 96, the second drive pin 36 is in the engagement hole 59. The rattling is suppressed.

  Thus, according to the present embodiment, when the first blade member 50 and the second blade member 60 move in the Z direction in the throttling operation, the engagement holes of the drive pins 35, 36 by the wire springs 95, 96 Since it is possible to suppress rattling in 58 and 59, variations in the diameter of the opening formed by the first blade member 50 and the second blade member 60 are less likely to occur. As a result, the performance of the camera 102 is stabilized.

  Further, the wire spring 95 fixed to the surface 50A of the first blade member 50 and the wire spring 96 fixed to the back surface of the second blade member 60 do not require a large space in the X direction. That is, according to the present embodiment, the mechanism for suppressing the rattling of the drive pins 35, 36 in the engagement holes 58, 59 is fixed to the front or back surface of the blade members 50, 60 with the wire springs 95, 96. It can be realized just by doing. Therefore, it is not necessary to provide a member straddling between the ground plate 3 and the blade members 50 and 60, and the blade drive device 1 can be thinned. As described above, the blade drive device 1 of the present embodiment can be installed in a limited space, and can be incorporated into a small electronic device such as a smartphone.

  FIG. 8 is a plan view showing a blade driving device 201 according to a second embodiment of the present invention. As shown in FIG. 8, in the present embodiment, a clip-type wire spring 295 is fixed to the surface 50 </ b> A of the first blade member 50 as a biasing member. The wire spring 295 is fixed to the first drive pin 35 along a direction different from the fixed portion 291 fixed to the surface 50 A of the first blade member 50, the intermediate portion 297 extending from the fixed portion 291, and the intermediate portion 297. And a contact portion 292 extending toward the end. The middle portion 297 and the contact portion 292 are connected by a curved portion. The fixing portion 291 of the wire spring 295 is fixed to the first blade member 50 by, for example, a resin such as a UV curing resin. The wire spring 295 is in contact with the first drive pin 35 in the vicinity of the tip of the contact portion 292, and biases the first drive pin 35 in the −Z direction to make the first drive pin 35 the first. The edge of the engagement hole 58 of the blade member 50 is pressed. Similarly, although a clip type wire spring is fixed as a biasing member also to the back surface of the second blade member 60, illustration is omitted in FIG.

  Even with such a configuration, the same effect as that of the above-described first embodiment can be obtained. Further, in the present embodiment, since the clip-type wire spring is used as the biasing member, the fixing portion 291 of the wire spring 295 can be brought close to the drive pin 35. Therefore, since the biasing force of the biasing member can be increased compared to the wire springs 95 and 96 of the first embodiment, rattling of the drive pins 35 and 36 in the engagement holes 58 and 68 is more effective. Can be suppressed.

  FIG. 9 is a perspective view showing a blade driving device 301 according to a third embodiment of the present invention. As shown in FIG. 9, in the present embodiment, a plate spring 395 is fixed to the surface 50A of the first blade member 50 as a biasing member. The leaf spring 395 has a fixing portion 391 fixed to the surface 50A of the first blade member 50, an intermediate portion 397 extending from the fixing portion 391, and a first drive pin 35 along a direction different from the intermediate portion 397. And a contact portion 392 extending toward the The middle portion 397 and the contact portion 392 are connected by a curved portion. The fixing portion 391 of the plate spring 395 is fixed to the first blade member 50 by, for example, a resin such as a UV curing resin. The plate spring 395 is in contact with the first drive pin 35 in the vicinity of the tip of the contact portion 392, and biases the first drive pin 35 in the -Z direction to thereby make the first drive pin 35 the first. Is pressed against the edge of the engagement hole 58 of the blade member 50 of FIG. Similarly, a plate spring is also fixed as a biasing member to the back surface of the second blade member 60, but illustration is omitted in FIG.

  Also with this configuration, the same effect as that of the second embodiment described above can be obtained. Further, in the present embodiment, since the plate spring is used as the biasing member, the contact portion between the biasing member and the drive pin 35 can be in surface contact. Therefore, since the biasing force of the biasing member can be increased compared to the wire spring 295 of the second embodiment, rattling of the drive pins 35, 36 in the engagement holes 58, 68 can be more effectively performed. It can be suppressed. Further, since the contact portion between the biasing member and the drive pin 35 is a surface contact, the durability of the biasing member is also improved.

  FIG. 10 is a perspective view showing a blade drive device 401 according to a fourth embodiment of the present invention. As shown in FIG. 10, in the present embodiment, a torsion coil spring 495 is fixed to the surface 50A of the first blade member 50 as a biasing member. The torsion coil spring 495 has a fixed portion 491 fixed to the surface 50 A of the first blade member 50, an intermediate portion 497 extending from the fixed portion 491, and a first drive pin 35 along a direction different from the intermediate portion 497. And a contact portion 492 extending toward the The intermediate portion 497 and the contact portion 492 are connected by a spiral portion 493. The fixing portion 491 of the torsion coil spring 495 is fixed to the first blade member 50 by, for example, a resin such as a UV curing resin. The torsion coil spring 495 is in contact with the first drive pin 35 in the vicinity of the tip of the contact portion 492, and biases the first drive pin 35 in the -Z direction to thereby make the first drive pin 35 the first. Is pressed against the edge of the engagement hole 58 of the blade member 50 of FIG. Similarly, a torsion coil spring is fixed as a biasing member also to the back surface of the second blade member 60, but illustration is omitted in FIG.

  Also with this configuration, the same effect as that of the second embodiment described above can be obtained. Further, in the present embodiment, since a torsion coil spring is used as the biasing member, it is possible to adjust the biasing force of the biasing member by changing the number of turns of the helical portion 493.

  In the above-described embodiments, the biasing member is provided on the front surface 50A of the first blade member 50 and the back surface of the second blade member 60. However, the biasing member is the back surface of the first blade member 50 Alternatively, it may be provided on the surface of the second blade member 60. It goes without saying that a biasing member (for example, rubber) other than the above-described spring can be used as the biasing member.

  Moreover, although the example which fixes an urging member using resin was demonstrated in the above-mentioned each embodiment, the fixing method of an urging member is not restricted to this. In the case of fixing the biasing member with resin, there is no need to form a structure for fixing the biasing member to the blade member, so the structure of the blade member can be simplified. Therefore, the blade driving device can be effectively thinned, and the throughput of the manufacturing process can be improved.

  In each of the above-described embodiments, the blade drive device for adjusting the aperture diameter by the diaphragm blade has been described as an example, but the blade drive device according to the present invention is not limited to this. The present invention can also be applied to a blade drive device for blocking light and a blade drive device for switching a filter by attaching a filter for transmitting a predetermined wavelength to the blade.

  Although the preferred embodiments of the present invention have been described above, it is needless to say that the present invention is not limited to the above-described embodiments and may be implemented in various different forms within the scope of the technical idea thereof.

  The terms "front", "back", "front", "back", and other terms used in the present specification are used in the context of the illustrated embodiment, It changes with the relative positional relationship of.

1,201,301,401 Blade drive unit 1A Optical path opening 3 Base plate 4 lever (drive member)
DESCRIPTION OF SYMBOLS 5 cover part 10 base member 11 fixed axis 12 rotation axis 15, 16 guide axis 17 insertion part 18 notch 20 flexible printed circuit board 21 yoke 22, 32, 71, 72, 81, 82 through hole 23 end (flexible printed circuit board )
Reference Signs List 30 lever main body 31 magnet 33 substrate coil 33A coil pattern 35 first drive pin (drive portion)
36 2nd drive pin (drive section)
DESCRIPTION OF REFERENCE NUMERALS 40 blade retainers 41, 42, 45 and 46 through holes 47 and 77 openings 48 and 49 long holes 50 first blade member 50 A (of first blade member) surface 55 and 66 guide groove 57 and 67 throttle hole 58, 68 engagement hole 60 second blade member 70 side plate 78, 79, 88, 89 long hole 80 cover main body 91, 93 fixing portion 92, 94 contact portion 95, 96 wire spring (biasing member)
101 Smartphone (Electronic Equipment)
102 Camera (imaging device)
103 lens module 110 lens holder 114 stopper 291 fixing part 292 contact part 295 wire spring (biasing member)
297 Middle part 391 Fixing part 392 Contact part 395 Leaf spring (biasing member)
397 middle part 491 fixed part 492 contact part 493 helical part 495 torsion coil spring (biasing member)
497 Middle part

Claims (11)

Ground plate section,
A blade member configured to be movable with respect to the ground plate portion and having an engagement hole formed therein;
A drive member having a drive portion engaged with the engagement hole of the blade member, and moving the blade member by moving the drive portion relative to the base plate portion;
And a biasing member fixed on a front surface or a back surface of the blade member and pressing the driving portion of the driving member against an edge of the engagement hole.   The blade driving device according to claim 1, wherein the biasing member is configured to bias the driving portion of the driving member in a moving direction of the blade member. The biasing member is
A fixing portion fixed to the blade member;
The blade drive device according to claim 1, further comprising: a contact portion extending from the fixed portion toward the drive portion and in contact with the drive portion. The biasing member is
A fixing portion fixed to the blade member;
An intermediate portion extending in the first direction from the fixing portion;
The contact part which is connected to the middle part, extends toward the drive part along the 2nd direction different from the 1st direction, and contacts the drive part. Blade drive.   The blade driving device according to any one of claims 1 to 4, wherein the biasing member is constituted by a spring.   The blade driving device according to claim 5, wherein the biasing member comprises a wire spring.   The blade driving device according to claim 5, wherein the biasing member comprises a plate spring.   The blade driving device according to claim 1, wherein the biasing member comprises a torsion coil spring.   The blade driving device according to any one of claims 1 to 8, wherein the biasing member is fixed to the front surface or the back surface of the blade member by an adhesive. With at least one lens,
10. A blade drive according to any one of the preceding claims, arranged on the optical axis of the at least one lens.
An imaging device disposed on a surface on which the light transmitted through the at least one lens forms an image; An electronic apparatus comprising the imaging device according to claim 10.

Images