JP2016157040A - Optical vibration control device and optical apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized optical vibration control device and an optical apparatus using the same.SOLUTION: The optical vibration control device comprises a flexible substrate, a fixation member for fixing the flexible substrate and a movement member for holding a vibration control element of a lens or an image pickup device. A flat face where the flexible substrate and the fixation member come in contact with each other is provided with at least two of a first positioning part and a second positioning part adjacent to each other for restricting rotation and movement. The device comprises detection means capable of measuring a movement amount of the movement member at the first positioning part, and has a deflection part of length longer than that of the case where the flexible substrate is connected in the contact plane at a connection part where the first positioning part and the second positioning part at which the flexible substrate is fixed are connected. The deflection part is present on the fixation member side more than the contact plane.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optical image stabilizer that is mounted on an optical apparatus such as an imaging device, an interchangeable lens, and an observation device to suppress image blur.

  In order to suppress image blur due to camera shake such as camera shake during handheld shooting / observation, the optical image stabilizer is an optical element such as a lens or an image sensor based on the detection result of the shake of the optical instrument. The vibration element is moved in a direction (shift direction) different from the light traveling direction (optical axis direction). Such an optical vibration isolator has a base member constituting the apparatus main body, and a shift member that holds the optical element or the imaging element and is movable in the shift direction with respect to the base member. In Patent Document 1, as a driving means, the shift member is controlled by providing a measuring means for holding the coil on the shift member and holding the magnet on the base member and measuring the displacement amount of the base member and the shift member.

  In general, the same flexible substrate is used to energize the sensor on the base member and the coil on the shift member. Therefore, the flexible substrate is disposed on the fixing member and the shift member, and a rising portion from the fixing member to the optical axis direction shift member side is provided on the flexible substrate in order to connect the fixing member to the shift member. There is a fixed part of the sensor that becomes the starting part and the measuring means. It is known that the raising portion and the fixing portion are generally positioned in order to improve performance.

  With respect to positioning of a fixed portion of a sensor serving as a measuring means, Patent Document 2 discloses positioning of a Hall element mounted on a flexible substrate. By sandwiching the positioning of the Hall element, not the flexible board, with the fixing member, it is possible to position the Hall element without an error in mounting the Hall element with respect to the flexible board.

JP 2011-158924 A JP 2013-92563 A

  The anti-vibration device having the flexible substrate rising portion and the positioning portion on the same plane flexible substrate as in the prior art disclosed in the above-mentioned Patent Document 1 also uses Hall elements as in Patent Document 2. Is preferably positioned. In that case, considering the mounting error of the Hall element on the flexible board, it is necessary to have a deflection part where the distance between the fixed part of the flexible board and the positioning part of the Hall element is set longer than the distance between the positioning parts. is there. However, if the flexible portion is provided, a force is generated in the flexible substrate, which may lead to the floating of the Hall element and reduce the sensing accuracy. In addition, it is necessary to secure a space in order to prevent the flexible portion from interfering with the shift member.

  Therefore, an object of the present invention is to provide a small and highly accurate optical image stabilizer and an optical apparatus using the same.

  In order to achieve the above object, the present invention provides an optical vibration isolator having a flexible board, a fixing member for fixing the flexible board, and a moving member for holding a vibration isolating element of a lens or an image sensor. The plane where the substrate and the fixing member contact each other has at least two adjacent first positioning portions and second positioning portions that restrict rotation and movement, and the first positioning portion includes the moving member. Detecting means capable of measuring a moving amount, wherein the flexible substrate is connected to the first positioning portion of the fixing member at the connecting portion connecting the first positioning portion and the second positioning portion to which the flexible substrate is fixed. It has a flexible part longer than the positioning part and the length of the 2nd positioning part of a fixed member, and the flexible part is the contact It exists in the said fixing member side rather than the plane to do.

  ADVANTAGE OF THE INVENTION According to this invention, provision of a small and highly accurate optical vibration isolator and an optical apparatus using the same is realizable.

It is a figure which shows the vicinity of the 1st positioning part 01a of Example 1 and the 2nd positioning part 01c in detail. It is a schematic diagram of an interchangeable lens and camera using the optical image stabilizer of the present invention. It is a figure which shows the vibration isolator of Example 1. FIG. It is a figure which shows the structure of the assembly | attachment of the fixing member of the vibration isolator of Example 1, and a moving member. FIG. 3 is a diagram illustrating a fixing member and a flexible substrate of Example 1 from the assembly side of a moving member 02. It is a figure which shows the fixing member and flexible substrate of Example 1 from the assembly | attachment side and moving side of a moving member. It is a figure which shows the vicinity of the 1st positioning part 01a of Example 2 and the 2nd positioning part 01c in detail.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 is a schematic diagram of an interchangeable lens and camera using the optical image stabilizer 0 of the present invention.

  The interchangeable lens includes an optical image stabilizer 0, a diaphragm 1, a focus lens group 2, a zoom lens group 3, a lens side CPUMPU (microprocessing unit) 4, and a lens side terminal 5. The camera also has a camera side terminal 6, a camera side MPU 7, and an image sensor 8.

  The optical image stabilizer 0, the diaphragm 1, the focus lens group 2, and the zoom lens group 3 can be controlled by the lens side MPU4. The lens-side MPU 4 is connected to the camera-side MPU 7 through the lens-side terminal 5 and the camera-side terminal 6 and controls the optical image stabilizer 0, the diaphragm 1, the focus lens group 2, and the zoom lens group 3 according to commands from the camera-side MPU. It is possible. An image obtained by the optical image stabilizer 0, the diaphragm 1, the focus lens group 2, and the zoom lens group 3 can be obtained by the imaging element 8.

  At this time, the arrangement of the optical image stabilizer 0, the diaphragm 1, the focus lens group 2, and the zoom lens group 3 is not limited to the figure. Needless to say, the camera may have an optical image stabilizer. Although FIG. 2 shows a schematic diagram of an interchangeable lens and a camera, it goes without saying that the interchangeable lens using the optical image stabilizing device 0 or a camera having a lens barrel, an optical device such as a microscope may be used.

[Example 1]
FIG. 3 shows a vibration isolator according to an embodiment of the present invention. This vibration isolator has a fixed member 00, a flexible substrate 01, a moving member 02, and a lens 03 as a vibration isolator. The flexible substrate 01 is fixed to the fixed member 00 and the moving member 02 by a double-sided tape.

  FIG. 4 is a diagram showing a configuration for assembling the fixed member 00 and the moving member 02. The moving member 02 is biased by a spring 04a, a spring 04b, and a spring 04c via a ball 05a, a ball 05b, and a ball 05c. Therefore, the moving member 02 is movable in parallel with the central axis of the lens 03 with respect to the fixed member 00. A voice coil motor is provided as an actuator for moving the moving member 02. The configuration will be described below.

  FIG. 5 is a view showing the fixed member 00 and the flexible substrate 01 from the assembly side of the moving member 02. On the fixing member 00, a lower yoke 07a and a lower yoke 07b, in which a driving magnet 06a and a driving magnet 06b having two poles on the same surface are attracted and held by a magnetic force, are fixed by screws. The fixing member 00 holds the upper yoke 08 so that a gap is provided between the driving magnet 06a and the driving magnet 06b. The moving member 02 holds the coil 09a and the coil 09b between the driving magnet 06a, the driving magnet 06b, and the upper yoke 08, respectively.

  The coils 09a and 09b are connected to the flexible substrate 01 and can supply electricity. At this time, the driving direction of the driving magnet 06a, the lower yoke 07a, the upper yoke 08, and the coil 09a is the X direction, and the driving direction of the driving magnet 06b, the lower yoke 07b, the upper yoke 08, and the coil 09b is the Y direction.

  FIG. 6 is a view showing the fixed member 00 and the flexible substrate 01 from the side opposite to the assembly side of the moving member 02. In order to detect the amount of movement of the moving member 02, the Hall element 011c mounted on the flexible substrate 01, the Hall element 013c and the detecting magnet 10a having two poles on the same surface held by the moving member 02, and the detecting magnet 10b have. At this time, the Hall element 011c detects the amount of movement of the moving member 02 in the Y direction, and the Hall element 013c detects the amount of movement of the moving member 02 in the X direction. The configuration will be described below.

  The first positioning portion 01a in the vicinity of the Hall element 011c of the flexible substrate 01 has a long hole portion 011a and a long hole portion 011b having long sides in the Y direction. Further, the fixing member 00 has positioning pins 001a and 001b at positions where the flexible substrate 01 can be inserted into the long hole portion 011a and the long hole portion 011b without being bent. In the first positioning portion 01a, the reinforcing plate 4a has the same shape as the flexible substrate 01 and is bonded with a double-sided tape. The flexible substrate 01 and the reinforcing plate 014a are fixed to the fixing member 00 by caulking the positioning pins 001a and 001b.

  Since the positioning pins 001a and 001b are substantially the same in length in the X direction as the long hole portions 011a and 011b, they are positioned in the X direction and also in the rotational direction.

  In the first positioning portion 01a in the vicinity where the Hall element 011c is mounted, the flexible substrate 01 is held between the fixed member 00 and the moving member 02, and the Hall element 011c is a moving member as viewed from the flexible substrate 01. It is mounted on the opposite side to the side with 02. The hall element 011c is press-fitted and held in the hall element fixing part 001c by a hall element biasing part 001d having a spring property, and is positioned in the Y direction. By positioning the Y direction, which is the detection direction of the Hall element, on the Hall element itself, it is possible to detect the position with high accuracy with respect to the Y direction. Thus, the movement and rotation of the first positioning unit 01a in the vicinity of the Hall element 011c are restricted.

  Similarly, the third positioning portion 01b in the vicinity of the Hall element 013c of the flexible substrate 01 is moved and rotated by the positioning pin 003a and the positioning pin 003b with respect to the X direction and is also positioned with respect to the rotation direction. The Similarly, the third positioning part 01b in the vicinity where the Hall element 013c is mounted is similarly positioned in the Y direction by the positioning part 013c and the positioning part 013d. Further, the reinforcing plate 014b and the flexible substrate 01 are fixed to the fixing member 00 by caulking the positioning pins 003a and 003b. Therefore, the movement and rotation of the third positioning part 01b in the vicinity of the Hall element 013c are restricted.

  In the second positioning portion 01c having the rising portion 015 extending on the moving member of the flexible substrate 01, the flexible substrate 01 has a long hole portion 012a and a hole portion 012b. Further, the fixing member 00 has positioning pins 001a and 001b at positions where they can be inserted without being bent into the long hole portions 012a and 012b. Further, the flexible substrate 01 is fixed to the fixing member 00 by caulking the positioning pins 002a and 002b and providing a double-sided tape. As a result, movement and rotation can be restricted at the 01 part, the positional accuracy of the rising part 015 can be improved, and the anti-vibration performance can be stabilized.

  FIG. 1 is an external view showing in detail the vicinity of the first positioning part 01a and the second positioning part 01c. As shown in FIG. 1, between the first positioning portion 01a and the second positioning portion 01c of the flexible substrate 01, there is a flexible portion 015a portion that absorbs the tolerance caused by the mounting deviation of the Hall element 013c to the flexible substrate 01. doing. Further, the fixing member 00 has a concave portion in a region overlapping with the bent portion in the optical axis direction.

  The bending portion 015a is in a recess on the opposite side of the moving member 02 from the surface where the fixing member 00 and the flexible substrate 01 are in contact with each other in the first positioning portion 01a. For this reason, the flexible portion can efficiently use the space by entering the concave portion of the fixing member 00. Further, the fixing member 00 and the bent portion 015a are not in contact with each other in the central axis direction of the lens 03. Therefore, the force in the central axis direction of the lens 03 generated by the bending portion 015a and the fixing member coming into contact with the central axis direction of the lens 03 does not occur in the flexible substrate 01. Therefore, the force by which the flexible substrate 01 floats in the direction of the moving member 02 in the first positioning portion 01a can be reduced.

  Therefore, the detection magnet 10a of the moving member 02 and the Hall element 011c can be brought close to each other, so that the size can be reduced and the displacement of the moving member can be accurately detected.

  Further, the reinforcing plate 014a is not bonded to the bent portion 015a, and is present at least at a position where it overlaps with the bent portion 015a of the flexible substrate 01 in the central axis direction of the lens 03. As a result, the bent portion 015a is a restricting portion that positively prevents the flexible portion 015a from moving to the moving member 02 side from the surface where the fixed member 00 and the flexible substrate 01 are in contact with each other. The third positioning unit 01b and the second positioning unit 01c have the same configuration.

[Example 2]
FIG. 7 is a diagram illustrating in detail the vicinity of the first positioning unit 01a and the second positioning unit 01c according to the second embodiment. As shown in FIG. 7, Example 2 has the same configuration except for the flexible substrate 01 and the reinforcing plate 014c.

  The flexible substrate 01 has a flexible portion 015a as in the first embodiment. The reinforcing plate 014c is bonded to the first positioning portion 01a of the flexible substrate 01 with a double-sided tape, and does not overlap the flexible portion 015a in the optical axis direction. In addition, the fixing member 00 has a concave portion in a region overlapping with the bent portion in the optical axis direction, as in the first embodiment.

  The flexible substrate 01 has a folded portion 015b so as to protrude toward the base member side in the optical axis direction at the bent portion 015a. Thereby, the bending part 015a can be regulated in the recessed part of the fixing member 00. Therefore, the space can be used efficiently, and the flexure 015a can be restricted from moving toward the moving member 02 from the surface where the fixing member 00 and the flexible substrate 01 are in contact with each other when receiving an impact.

  Similarly to the first embodiment, the fixing member 00 and the bent portion 015a are not in contact with each other in the central axis direction of the lens 03. Therefore, the detection magnet 10a of the moving member 02 and the Hall element 011c can be brought close to each other, so that the size can be reduced and the displacement of the moving member can be accurately detected. The third positioning unit 01b and the second positioning unit 01c have the same configuration. In the embodiment, the example in which the flexible substrate and the reinforcing plate are partially bonded with the double-sided tape has been described. However, the reinforcing plate may not be bonded to the flexible substrate. Needless to say, a CMOS sensor may be used as the vibration isolation element.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

  The present invention is useful for an optical image stabilizer that is mounted on an optical apparatus such as an imaging device, an interchangeable lens, and an observation device to suppress image blur.

00 fixing member, 01 flexible substrate, 01a first positioning part,
01b 2nd positioning part, 02 moving member, 03 lens (vibration isolation element),
04a spring, 04b spring, 04c spring, 05a ball, 05b ball,
05c ball, 06a driving magnet, 06b driving magnet,
07a Lower yoke, 07b Lower yoke, 08 Upper yoke, 09a Coil,
09b coil, 10a detection magnet, 10b detection magnet,
001a positioning pin (first positioning part positioning means),
001b positioning pin (first positioning part positioning means),
001c Hall element fixing part, 001d Hall element biasing part,
002a positioning pin (second positioning unit positioning means),
002b positioning pin (second positioning unit positioning means),
003a Positioning pin, 003b Positioning pin, 003c Hall element fixing part,
003d Hall element biasing portion, 011a slotted portion (first positioning portion positioning means),
011b long hole portion (first positioning portion positioning means), 011c Hall element,
012a long hole portion (second positioning portion positioning means),
012b hole (second positioning part positioning means), 013a long hole part,
013b slot, 013c Hall element,
014a reinforcing plate (regulating means in Example 1), 014b reinforcing plate,
014c Reinforcing plate (regulating means in Example 2), 015a Deflection part

Claims (4)

A flexible substrate;
A fixing member for fixing the flexible substrate;
An optical vibration isolator having a moving member that holds a vibration isolator of a lens or an image sensor,
The plane on which the flexible substrate and the fixing member are in contact has at least two adjacent first positioning portions and second positioning portions that restrict rotation and movement,
The first positioning unit has a detecting means capable of measuring the moving amount of the moving member,
The flexible substrate is the length of the first positioning portion of the fixing member and the second positioning portion of the fixing member in the connecting portion connecting the first positioning portion and the second positioning portion to which the flexible substrate is fixed. Characterized by having a longer flexure than connected by
The optical vibration isolator according to claim 1, wherein the flexible portion is present on the fixing member side with respect to the contacting surface. The optical vibration isolator according to claim 1, further comprising a restricting unit that restricts the flexible portion so as to exist on the side of the fixing member with respect to the contacting flat surface. 3. The optical protection according to claim 1, wherein the detecting means detects a moving amount of the moving member by a Hall element attached to the flexible substrate and a magnet attached to the moving member. Shaker. An electronic apparatus including a lens barrel having the optical image stabilizer according to any one of claims 1 to 3 and an imaging device.