JP2013120248A - Elastic support structure of optical vibration-proof device and optical vibration-proof device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elastic support structure of an optical vibration-proof device, which prevents plastic deformation in an imaging optical axis direction when an optical lens drops.SOLUTION: An optical vibration-proof device 1 includes a movable portion 10, a compensation unit 20, and a plurality of suspension wires 5. A lens 105 is mounted in the movable portion 10. The compensation unit 20 faces the movable portion 10 and is located on the same imaging optical axis 7 as the movable portion 10. Both ends of each of the suspension wires 5 are connected to the movable portion 10 and the compensation unit 20. An upper flat spring 108 is disposed on the movable portion 10. Each of the suspension wires 5 has one end part connected onto an outer peripheral side arm portion 1081 and at least one auxiliary portion 1082 and has the other end part connected to the compensation unit 20, so that the movable portion 10 and the compensation unit 20 face each other and are spaced from each other by a prescribed gap.

Description

  The present invention relates to an elastic support structure for an optical vibration isolator, and in particular, an optical vibration isolator capable of enhancing the seismic strength of the lens unit by preventing permanent deformation when the lens unit falls, and It relates to the elastic support structure.

  Due to advances in science and technology, the volume of digital cameras is becoming increasingly smaller. In addition, many small electronic devices such as mobile phones have a digital imaging function due to the miniaturization of the lens unit. A voice coil motor (hereinafter referred to as “VCM”) is used in many conventional small lenses. The VCM has a structure in which a coil magnet and an elastic piece are combined, and realizes an autofocus function and a zoom function by moving a mounted lens back and forth along the imaging optical axis direction. In addition, demands for imaging quality and functions are increasing, and professional cameras and amateur cameras are distinguished by 10 million pixels and a camera shake prevention function.

  In an optical system composed of a lens unit and an image compensation unit, for example, when an external force is applied or a camera shake occurs, the light path shifts due to vibrations on the image compensation unit. Imaging becomes unstable, and the captured image becomes unclear. As a solution to this problem, a method of sharpening a captured image by providing a compensation mechanism is most often performed. The compensation mechanism may be a digital compensation mechanism or an optical compensation mechanism.

  The digital compensation mechanism acquires a clear digital image by performing analysis and processing on the captured digital image data by the image compensation unit. This method is also called a digital image stabilization mechanism. In general, the optical compensation mechanism is one in which a vibration compensation device is arranged on an optical lens group or an image compensation unit. This method is also called an optical image stabilization mechanism. However, the conventional optical vibration isolation mechanism is complicated or uses a structure or member having a large volume, so that it is difficult to assemble, the cost is high, and the volume cannot be reduced. Therefore, improvement has been demanded.

  FIG. 1 is an exploded perspective view showing an optical compensation mechanism of Patent Document 1. In FIG. In the optical compensation mechanism of Patent Document 1, by using flexible members 400a to 403a made of metal wires or the like, the circuit board 301a on which the image sensor 300a is mounted moves in a direction perpendicular to the optical axis 201a. To do. Further, the X axis between the photographic lens member 203a (including the photographic lens 200a and the holding unit 202a) and the circuit board 301a is provided by the two shake detection sensors 500a and 501a and the position detection sensor 503a. The amount of Y-axis displacement is transmitted to the image stabilization controller 504a. Next, the shift driving member 502a is controlled based on the amount of displacement, whereby the circuit board 301a is driven to move in a direction perpendicular to the optical axis 201a. This prevents the image sensor 300a from generating a blurred image due to vibration.

  The conventional technique of Patent Document 1 is a technique for preventing an image from becoming unclear due to camera shake. In the present invention, an autofocus unit is combined with a similar concept to prevent displacement of the X axis and the Y axis due to camera shake in the lateral direction, and when the lens member falls, the lens member moves in the Z axis direction (with the imaging optical axis). It is an object of the present invention to provide an optical vibration isolator capable of preventing permanent (plastic) deformation in the same direction and improving vibration resistance against vibration generated by a drop impact.

JP 2002-207148 A

  The main object of the present invention is to add an auxiliary part to the upper leaf spring of the movable part that is an autofocus unit, and to strengthen the strength of the outer peripheral arm of the upper leaf spring, when the lens falls, An object of the present invention is to provide an elastic support structure for an optical vibration isolator capable of preventing plastic deformation in the imaging optical axis direction.

  In order to solve the above-described problem, the optical image stabilizer of the present invention includes a movable part, a compensation unit, and a plurality of first elastic members (hereinafter also referred to as “suspension wires”). On the optical image stabilizer, an X-axis direction, a Y-axis direction, and a Z-axis direction that are perpendicular to each other are defined. A lens is disposed in the movable portion, and an imaging optical axis that is parallel to the Z axis is defined. By connecting both ends of each suspension wire to the movable part and the compensation unit, the movable part is suspended and fixed on the compensation unit along the Z-axis direction. At least one second elastic member (hereinafter also referred to as “plate spring”) is disposed on the movable portion. The leaf spring includes an outer peripheral side portion coupled to the movable portion, an inner peripheral side portion coupled to the lens, at least one inner peripheral arm portion connecting between the outer peripheral side portion and the inner peripheral side portion, A plurality of connection ends located on the outer peripheral side portion. One end of each suspension wire is coupled onto the corresponding connection end.

  The connection ends of the leaf springs and the outer peripheral side portion are connected by the outer peripheral side arm portion and the auxiliary portion. That is, one end portion of the outer arm portion and the auxiliary portion is connected to the connection end. The other end of the outer peripheral side arm and the auxiliary part is connected to the outer peripheral side.

  The elastic support structure of the optical vibration isolator according to the present invention can prevent the outer peripheral arm portion from being permanently deformed by the outer peripheral arm portion when the maximum stress generated when the outer arm portion is dropped exceeds the yield stress. In addition, since the strength of the outer arm is increased by adding the auxiliary part, the displacement in the Z-axis direction exceeds the allowable range when the movable part suspended by the suspension wire falls. Can be prevented.

It is a disassembled perspective view which shows the optical compensation mechanism of patent document 1 which is a prior art. It is a disassembled perspective view which shows the optical vibration isolator by 1st Embodiment of this invention. It is a perspective view which shows the optical vibration isolator by 1st Embodiment of this invention. It is a top view which shows the leaf | plate spring of the optical vibration isolator by 1st Embodiment of this invention. FIG. 5 is an enlarged view of FIG. 4. It is a top view which shows the leaf | plate spring of the conventional optical vibration isolator. It is a perspective view which shows the suspension wire of the optical vibration isolator by 2nd Embodiment of this invention. It is a perspective view which shows the suspension wire of the optical vibration isolator by 3rd Embodiment of this invention.

(First embodiment)
This will be described with reference to FIGS. FIG. 2 is an exploded perspective view showing the optical image stabilizer according to the first embodiment of the present invention. FIG. 2 is a perspective view showing the optical image stabilizer according to the first embodiment of the present invention.

  The elastic support structure of the optical image stabilizer according to the first embodiment of the present invention defines an X-axis direction, a Y-axis direction, and a Z-axis direction that are perpendicular to each other. The optical image stabilizer 1 includes a movable part 10, a compensation unit 20, a sensor unit 30 and a plurality of first elastic members 5. In the present embodiment, the plurality of first elastic members 5 (hereinafter also referred to as “suspension wires 5”) are a plurality of suspension wires. The movable unit 10 (hereinafter also referred to as “autofocus unit 10”) is an autofocus unit or a zoom unit, and a lens 105 is disposed therein. An imaging optical axis 7 is defined in the lens 105. In another embodiment not shown in FIG. 1, the movable unit 10 may be a lens unit that does not have an autofocus function or a zoom function. The surface of the movable part 10 is substantially parallel to a plane constituted by the X-axis direction and the Y-axis direction. The compensation unit 20 faces the movable part 10 and is located on the same imaging optical axis 7. The imaging optical axis 7 is substantially parallel to the Z axis. The plurality of suspension wires 5 (first elastic members 5) are arranged substantially parallel to the Z axis, and the coupling end 51 and the fixed end 52 of each suspension wire 5 are respectively an autofocus unit 10 and a compensation unit. 20, and the autofocus unit 10, the compensation unit 20, and the sensor unit 30 are positioned on substantially the same imaging optical axis 7. Further, the outer side of the optical image stabilizer 1 is covered with the housing 40, so that the sensor unit 30 facing the autofocus unit 10 takes in an external image from the through hole 401 on the housing 40.

In this embodiment, the autofocus unit 10 includes a base 101, a lens holder 102, a coil 103, a plurality of magnets 104, a lens 105, a cover plate 106, an insulating plate 107, a second elastic member 108, a lower leaf spring 109, and a magnet. The fixing member 110 includes two X-axis magnets 111 and two Y-axis magnets 112.
The compensation unit 20 is an optical image stabilization unit, and is used to compensate for displacement of the lens 105 due to vibration in at least the Y-axis direction and the Z-axis direction. The compensation unit 20 includes a substrate 201, a correction circuit substrate 202, two X-axis magnet drive coils 203, two Y-axis magnet drive coils 204, an X-axis shake detection sensor 205, and a Y-axis shake detection sensor 206. In the present invention, the second elastic member 108 also has a leaf spring structure and is positioned above the autofocus unit 10. For this reason, the second elastic member 108 is also referred to as an upper leaf spring 108 hereinafter.

  The autofocus unit 10 may include a VCM. In the base 101 of the autofocus unit 10, a lens holder 102 having a lens 105 is mounted on the imaging optical axis 7 (substantially parallel to the Z axis). On the outer periphery of the lens holder 102, a plurality of magnets 104 disposed on the inner peripheral edge portion of the base 101 are disposed, and a corresponding coil 103 is wound. A plurality of magnets 104 and coils 103 constitute a VCM electromagnetic drive unit, and the lens holder 102 and the lens 105 in the lens holder 102 linearly move along the direction of the imaging optical axis 7. The lens holder 102 moves back and forth on the imaging optical axis 7 by generating various magnetic fields with the magnet 104 depending on the magnitude of the current input to the coil 103. Thereby, a zoom function or an autofocus function is realized.

  The lens holder 102 is disposed in the base 101 and is elastically clamped by the upper leaf spring 108 (second elastic member) and the lower leaf spring 109. The upper leaf spring 108 and the lower leaf spring 109 are made of a metal material, and are elastic plate bodies having a hollow plate-like thin plate structure, and are manufactured by press molding or etching. The cover plate 106 covers the lens holder 102 and is coupled to the base 101 to limit the movement range of the lens holder 102. The insulating plate 107 is disposed between the lid plate 106 and the upper leaf spring 108 and provides an insulating effect. The magnet fixing member 110 is disposed at the bottom of the base 101 and faces the compensation unit 20. The two X-axis magnets 111 and the two Y-axis magnets 112 are arranged opposite to each other on the magnet fixing member 110. The two Y-axis magnets 112 are positioned next to the two X-axis magnets 111, respectively.

  The compensation unit 20 mainly moves the autofocus unit 10 horizontally in the direction perpendicular to the imaging optical axis 7 (X-axis direction or Y-axis direction). The substrate 201 faces the base 101 of the autofocus unit 10. The correction circuit board 202 is coupled to the board 201 and is electrically connected to the board 201. The two X-axis magnet drive coils 203 are disposed opposite to each other on the correction circuit board 202 and are opposed to the two X-axis magnets 111. The two Y-axis magnet drive coils 204 are disposed opposite to each other on the correction circuit board 202 and are positioned next to the two X-axis magnet drive coils 203 to face the two Y-axis magnets 112. The X-axis shake detection sensor 205 is disposed on the substrate 201 and is used to detect the amount of displacement of one X-axis magnet 111 in the two X-axis magnets 111. The Y-axis shake detection sensor 206 is disposed on the substrate 201 and is used to detect the amount of displacement of one Y-axis magnet 112 in the two Y-axis magnets 112. The X-axis shake detection sensor 205 and the Y-axis shake detection sensor 206 are composed of a Hall sensor, a magnetic sensor (MR Sensor), a fluxgate sensor (Fluxgate), an optical position sensor, or an optical encoder (Optical Encoder). This is a shake detection sensor element. In the present embodiment shown in FIG. 2, the X-axis magnet drive coil 203 and the Y-axis magnet drive coil 204 are arranged on the correction circuit board 202. However, in other embodiments not shown, the X-axis magnet drive coil 203 and The Y-axis magnet drive coil 204 may be disposed directly on the substrate 201, whereby the correction circuit substrate 202 can be omitted.

  The sensor unit 30 is located below the compensation unit 20. The sensor unit 30 includes a circuit board 301 and an image sensor 302. The imaging element 302 is disposed on the circuit board 301 and is positioned on the same imaging optical axis 7 together with the autofocus unit 10. The image sensor 302 of the sensor unit 30 captures an external image via the autofocus unit 10. The plurality of suspension wires 5 are made of a flexible wire. The suspension wire 5, the upper leaf spring 108, and the lower leaf spring 109 are all conductive and can be conductive wires that transmit the drive current of the autofocus unit 10.

  In the present embodiment, the number of suspension wires 5 is four, and it is preferable that the suspension wires 5 are arranged at equal intervals outside the base 101. Further, each coupling end 51 of the suspension wire 5 is connected on the four corners of the upper leaf spring 108 of the autofocus unit 10 on the average, and the outer side arm formed by extending the upper leaf spring 108. The unit 1081 is coupled with the at least one auxiliary unit 1082 added. Please refer to FIG. 4 and FIG. FIG. 4 is a plan view showing a leaf spring of the optical image stabilizer according to the first embodiment of the present invention. FIG. 5 is an enlarged view of FIG. As shown in FIGS. 4 and 5, the upper leaf spring 108 has a hollow thin plate structure, an outer peripheral side portion 1085 coupled to the base 101 of the movable portion 10, and a lens holder in which the lens 105 is disposed. 102, an inner peripheral side portion 1086 coupled to the outer peripheral side portion 1085, at least one inner peripheral side arm portion 1087 connecting the outer peripheral side portion 1085 and the inner peripheral side portion 1086, and a plurality of outer peripheral side portions 1085. Connection end 1088. The coupling end 51 of each suspension wire 5 is coupled on the corresponding connection end 1088. Each connection end 1088 of the upper leaf spring 108 and the outer peripheral side portion 1085 are connected by an outer peripheral side arm portion 1081 and at least one auxiliary portion 1082. That is, one end of each of the outer arm portion 1081 and the auxiliary portion 1082 is connected to the connection end 1088, and the other end portion of the outer arm portion 1081 and the auxiliary portion 1082 is both an outer periphery. Connected to side 1085. In the present embodiment, the outer peripheral side portion 1085 of the leaf spring 108 has a rectangular structure (can be separated into two frame members), and has four side edges and four corner portions. Each connection end 1088 is located near the corner of the rectangular outer peripheral side portion 1085, and the outer peripheral arm portion 1081 and the auxiliary portion 1082 are respectively on different adjacent sides of the outer peripheral side portion 1085. Connected.

  That is, the connection end 1088 to which the outer peripheral side arm portion 1081 and the auxiliary portion 1082 are respectively connected is provided at the four corners of the upper leaf spring 108, and the coupling end 51 of the suspension wire 5 is fixed to the connection end 1088. . The meandering auxiliary portion 1082 of the upper leaf spring 108 is connected to the connection end 1088. Further, the outer peripheral arm portion 1081 is connected to the connection end 1088. As a result, the strength of the outer peripheral arm portion 1081 is strengthened, and the maximum stress generated when the autofocus unit 10 falls exceeds the yield stress of the outer peripheral arm portion 1081, thereby causing permanent deformation (plastic deformation). To prevent. In the present embodiment, the number of auxiliary units 1082 is one, but in other embodiments, two or more may be used. In addition, the upper leaf spring 108 (second elastic member) and the plurality of suspension wires 5 in the present embodiment are independent members, but in the other embodiments (not shown), the upper leaf spring 108 (second elastic member). The elastic member) and the plurality of suspension wires 5 (first elastic member) may be integrally formed as a single member. For example, the suspension wire 5 is first formed horizontally and integrally on each connection end 1088 of the upper leaf spring 108 by pressing or etching. Thereafter, each suspension wire 5 is bent downward by 90 degrees, so that the extending direction of each suspension wire 5 is perpendicular to the surface of the upper leaf spring 108 (not limited to this).

  The fixed end 52 of the suspension wire 5 is fixed on the compensation unit 20 substantially perpendicular to the Z axis. Thereby, the autofocus unit 10 is suspended and fixed on the compensation unit 20 with a predetermined interval. Further, the autofocus unit 10 can be moved in the X-axis direction and the Y-axis direction perpendicular to the imaging optical axis 7 depending on the material characteristics of the suspension wire 5. The length range of the suspension wire 5 is preferably 2 mm to 3 mm, and most preferably 2.7 mm. The diameter of the suspension wire 5 is preferably 0.04 mm to 0.05 mm, and most preferably 0.045 mm. In this embodiment, the Young's modulus of the material of the suspension wire 5 is 120,000 Mpa.

  That is, the autofocus unit 10 (movable part 10) is suspended and fixed on the compensation unit 20 with a predetermined distance by the four suspension wires 5, and the sensor unit 30 is the same below the compensation unit 20. Are arranged opposite to each other on the imaging optical axis 7. Due to the flexibility of the suspension wire 5 itself, the displacement of the autofocus unit 10 in the X axis and the Y axis is corrected and the weight is supported. Further, the X-axis shake detection sensor 205 and the Y-axis shake detection sensor 206 detect the amount of horizontal displacement generated by the vibration between the autofocus unit 10 and the sensor unit 30. Two X-axis magnets 111 fixed on the magnet fixing member 110 below the autofocus unit 10 by two X-axis magnet driving coils 203 and two Y-axis magnet driving coils 204 on the correction circuit board 202 Two Y-axis magnets 112 are driven. As a result, the lateral displacement amounts in the X-axis direction and the Y-axis direction perpendicular to the imaging optical axis 7 of the autofocus unit 10 are corrected, so that image blur is prevented and a suitable image is acquired.

  This will be described with reference to FIGS. FIG. 6 is a plan view showing a leaf spring of a conventional optical vibration isolator. In the present invention, by extending the length of the outer peripheral arm portion 1081 of the upper leaf spring 108, the maximum stress generated when the upper leaf spring 108 is dropped exceeds the yield stress of the outer peripheral arm portion 1081, and is permanently deformed (plastically deformed). To prevent. Furthermore, the strength of the outer peripheral arm portion 1081 can be enhanced by adding the auxiliary portion 1082. Further, according to the condition that the length L2 of the auxiliary portion 1082 is longer than the length L1 of the outer peripheral side arm portion 1081 (L2> L1) and the condition that the width of the auxiliary portion 1082 is smaller than the width of the outer peripheral side arm portion 1081. When the autofocus unit 10 is left stationary, the drawback that the amount of displacement in the lower Z-axis direction exceeds the allowable range due to gravity can be solved. According to the criteria of this technical field, in the stationary state, the range in which the autofocus unit 10 (movable part) is displaced in the lower Z-axis direction by gravity needs to be less than 0.005 mm.

  Refer to Table 1. Table 1 corresponds to the movement distance (mm) on the X-axis, Y-axis, and X-axis of the movable part (autofocus unit) generated when the drop test of the conventional optical image stabilizer shown in FIG. 6 is performed. Each yield stress (Mpa) of a leaf | plate spring and a suspension wire is shown.

  In Table 1, as shown in FIG. 6, a single short outer peripheral arm portion 41 and a suspension wire 5 are connected to the conventional leaf spring 4. The yield stress of the suspension wire 5 is between about 930 Mpa and 1180 Mpa. Further, the yield stress of the leaf spring 4 is about 1080 Mpa. Therefore, the movement distance that is most likely to occur when dropped is the displacement parameter of the movable part in the X-axis direction, Y-axis direction, and Z-axis direction (the displacement of the X-axis and Y-axis is 0.15 mm, The displacement was set to 0.1 mm). As a result, when the movable part is mounted using the conventional leaf spring 4 and a drop impact is applied, a yield stress of 1945 Mpa is generated in the suspension wire 5, and the allowable range of the yield stress of the suspension wire 5 is 930 Mpa˜ It has far exceeded 1180 Mpa. Moreover, the yield stress of 1694 Mpa generate | occur | produced in the conventional leaf | plate spring 4, and the yield stress 1080Mpa of the conventional leaf | plate spring 4 was far exceeded. Therefore, it was found from the data of the drop experiment that the conventional leaf spring 4 and the suspension wire 5 are permanently (plastically) deformed when subjected to a drop impact.

  As described above, the leaf spring 4 and the suspension wire 5 of the conventional optical vibration isolator cannot receive the stress received by dropping below the maximum yield stress (Mpa). Therefore, as shown in FIGS. 4 and 5, in the optical image stabilizer of the present invention, the outer peripheral side arm portion 1081 and the auxiliary portion 1082 at the four corners of the upper leaf spring 108 fixed in the autofocus unit 10. Is fixedly connected to the coupling end 51 of the suspension wire 5, and the autofocus unit 10 is fixed on the compensation unit 20 with a predetermined distance by the fixed end 52 of the suspension wire 5. As a result, when the autofocus unit 10 is left stationary, the distance moved downward by gravity is less than 0.005 mm, and the yield stress generated when the upper leaf spring 108 and the suspension wire 5 are subjected to a drop impact is , 930 Mpa to less than 1180 Mpa and 1080 Mpa, so that it falls within the allowable range. As a result, the upper leaf spring 108 can support the autofocus unit 10 in a state where stress can be sufficiently dispersed, and even if the autofocus unit 10 is displaced and deformed, the upper leaf spring 108 itself yields. The upper leaf spring 108 can elastically restore the autofocus unit 10 to its original position without exceeding the stress.

  Refer to Table 2. Table 2 shows a plate corresponding to the movement distance (mm) on the X-axis, Y-axis, and Z-axis of the movable part (autofocus unit 10) generated when the optical vibration isolator 1 of the present invention is dropped. Each yield stress (Mpa) of the spring 108 and the suspension wire 5 is shown.

  As can be seen from Table 2, the upper leaf spring 108 of the optical vibration isolator 1 of the present invention is sufficient for the outer arm 1081 by extending the length of the outer arm 1081 on the upper leaf spring 108. The amount of deformation can be given. Thereby, the deformation | transformation at the time of the suspension wire 5 receiving a drop impact can be suppressed, and the maximum yield stress can be reduced. However, when only the length of the outer peripheral arm portion 1081 to which the suspension wire 5 is connected is extended and the auxiliary portion 1082 is not added, the autofocus unit 10 (movable portion) has its own weight in the stationary state. Therefore, it is displaced by 0.0152 mm downward and cannot be made less than the standard value of 0.005 mm. That is, when it is attempted to prevent permanent deformation caused by a drop impact only by extending the length of the outer peripheral side arm portion 1081, the outer peripheral side arm portion 1081 is excessively flexible. The amount of displacement in the Z-axis direction becomes too large. Therefore, by extending the length of the outer peripheral arm portion 1081 and adding the auxiliary portion 1082, the outer peripheral arm portion 1081 can support the weight of the autofocus unit 10 and can withstand a drop impact force. It is necessary to do so. Further, the length L1 of the auxiliary portion 1082 needs to be longer than the length L2 of the outer peripheral arm portion 1081, so that the deformation amount of the outer peripheral arm portion 1081 is not affected. The preferable range of the thickness of the upper leaf spring 108 is 0.3 mm to 0.5 mm, and the optimum thickness is 0.4 mm. The Abbe number of the upper leaf spring 108 is 127,000 Mpa.

  A description will be given with reference to FIG. 2 again. As shown in FIG. 2, the auxiliary portion 1082 is added and the outer arm portion 1081 is combined, and the length of the auxiliary portion 1082 is longer than the outer arm portion 1081 (L2> L1), and the X axis As a result of applying a drop impact set by the Y axis and Z axis displacement parameters (X axis and Y axis displacement is 0.15 mm displacement, Z axis displacement is 0.1 mm), the yield stress of the suspension wire 5 is , 929.5 Mpa, and the yield stress of the upper leaf spring 108 was 880.9 Mpa. In addition, as a result of applying a drop impact set by the X-axis, Y-axis, and Z-axis displacement parameters (X-axis and Y-axis displacement is 0.15 mm displacement, Z-axis displacement is -0.1 mm), the suspension wire The yield stress of 5 was 912.2 Mpa, and the yield stress of the upper leaf spring 108 was 934.5 Mpa. The above yield stresses are both lower than the allowable range of yield stress of the suspension wire 5 from 930 Mpa to 1180 Mpa and the allowable range of yield stress of the upper leaf spring 108 of 1080 Mpa. In addition, the distance that the movable unit 10 is displaced in the Z-axis direction by its own weight in the stationary state is 0.00386 mm, and satisfies the condition that the moving range in the Z-axis direction is less than 0.005 mm. That is, it is possible to solve a number of drawbacks of the prior art.

(Second embodiment and third embodiment)
This will be described with reference to FIGS. FIG. 7 is a perspective view showing a suspension wire of the vibration isolator according to the second embodiment of the present invention. FIG. 8 is a perspective view showing a suspension wire of the vibration isolator according to the third embodiment of the present invention.
As shown in FIGS. 2 and 3, the suspension wire of the present invention has a S-shaped flexible portion that repeats as in the second embodiment shown in FIG. 7 in addition to a single wire structure extending in the Z-axis direction. The suspension wire 5a can be configured, or the suspension wire 5b having a helical spring-shaped flexible portion can be formed as in the third embodiment shown in FIG. The upper ends (coupling ends 51a, 51b) and the lower ends (fixed ends 52a, 52b) of the suspension wires 5a, 5b are respectively coupled to the connection end 1088 of the upper leaf spring 108 and the substrate 201 of the compensation unit 20. Due to the repeated S-shaped flexible portion or the spiral spring-shaped flexible portion, the suspension wires 5a and 5b have a very large flexibility in the horizontal direction in the X-axis direction and the Y-axis direction, and in the Z-axis direction. Also has a slight stretchability.

  The above-mentioned embodiment shows the applicable range of the present invention, and does not limit the applicable range of the present invention. The protection scope of the present invention includes modifications that are the technical spirit and equivalent effects defined by the claims of the present invention.

200a Lens 201a Optical axis 202a Holding unit 203a Imaging lens member 300a Imaging element 301a Circuit board 400a Flexible member 401a Flexible member 402a Flexible member 403a Flexible member 500a Shake detection sensor 501a Shake detection sensor 502a Shift drive member 503a Position detection sensor 504a Anti-vibration control unit 1 Optical anti-vibration device 10 Movable part (autofocus unit)
101 Base 102 Lens holder 103 Coil 104 Magnet 105 Lens 106 Cover plate 107 Insulating plate 108 Upper leaf spring (second elastic member)
1081 Outer peripheral side arm part 1082 Auxiliary part 1085 Outer peripheral side part 1086 Inner peripheral side part 1087 Inner peripheral side arm part 1088 Connection end 109 Lower leaf spring 110 Magnet fixing member 111 X-axis magnet 112 Y-axis magnet 20 Compensation unit 201 Substrate 202 Correction circuit Substrate 203 X-axis magnet drive coil 204 Y-axis magnet drive coil 205 X-axis shake detection sensor 206 Y-axis shake detection sensor 30 Sensor unit 301 Circuit board 302 Imaging element 40 Housing 401 Through hole 4 Conventional leaf spring 41 Outer arm 5 Suspension wire (first elastic member)
5a Suspension wire 5b Suspension wire 51 Coupling end 51a Coupling end 51b Coupling end 52 Fixed end 52a Fixed end 52b Fixed end 7 Imaging optical axis

Claims (8)

An elastic support structure for an optical vibration isolator having a movable part, a compensation unit, and a plurality of first elastic members,
On the optical image stabilizer, an X-axis direction, a Y-axis direction, and a Z-axis direction that are perpendicular to each other are defined,
In the movable portion, a lens is disposed, and an imaging optical axis that is parallel to the Z-axis direction is defined,
Since both ends of each first elastic member are connected to the movable part and the compensation unit, the movable part is suspended and fixed along the Z-axis direction on the compensation unit, and the movable part At least one second elastic member is disposed on the outer peripheral side portion coupled to the movable portion, the inner peripheral side portion coupled to the lens, and the outer periphery. A plurality of connection ends located on the outer peripheral side portion, and a plurality of connection ends positioned on the outer peripheral side portion, and each of the first elastic members One end is respectively coupled on the corresponding connecting end,
Between each connection end of the second elastic member and the outer peripheral side portion is connected by an outer peripheral side arm portion and at least one auxiliary portion, and one end portion of the outer peripheral side arm portion and the auxiliary portion is In addition to being connected to the connection end, the other end portion of the outer peripheral side arm portion and the auxiliary portion is connected to the outer peripheral side portion. The length of the auxiliary part is longer than the length of the outer peripheral arm part,
The second elastic member and the plurality of first elastic members are independently separated members or integrally formed single members,
The first elastic member is a suspension wire, and the structure of the suspension wire has a single wire structure extending in the Z-axis direction, a structure having a repetitive S-shaped flexible portion, or a spiral spring-like flexible portion. Structure,
The second elastic member is a leaf spring, and an outer peripheral side portion of the leaf spring has a rectangular structure, and has at least two adjacent sides, and each connection end has a rectangular outer peripheral side. The said outer peripheral side arm part and the said auxiliary | assistant part are each connected on the two adjacent different sides of the said outer peripheral side part, respectively located near the corner | angular part of a part. Elastic support structure for optical vibration isolator. The leaf spring is an upper leaf spring, and the movable part is an autofocus unit,
The autofocus unit has a base, a lens holder, a coil, a plurality of magnets, a lens, a cover plate, an insulating plate, a lower leaf spring, a magnet fixing member, two X-axis magnets, and two Y-axis magnets,
The lens holder is disposed in the base table,
The coil is disposed on the outer periphery of the lens holder,
The plurality of magnets are positioned at a peripheral portion in the base and face the coil. The plurality of magnets and the coil constitute an electromagnetic drive unit, and the lens holder is driven to perform the imaging. Move along the direction of the optical axis,
The lens is located on the imaging optical axis and is disposed in the lens holder.
The lid plate covers the lens holder,
The insulating plate is disposed between the lid plate and the upper leaf spring;
The lower leaf spring is located in the base and elastically holds the lens holder together with the upper leaf spring,
The magnet fixing member is disposed at the bottom of the base and faces the compensation unit,
The two X-axis magnets are arranged opposite to each other on the magnet fixing member,
The two Y-axis magnets are disposed opposite to each other on the magnet fixing member, and are positioned on the adjacent sides of the two X-axis magnets,
The compensation unit is an optical image stabilization unit, and includes a substrate, a correction circuit board, two X-axis magnet drive coils, two Y-axis magnet drive coils, an X-axis shake detection sensor, and a Y-axis shake detection sensor.
The substrate has a circuit and faces the base.
The correction circuit board is coupled to the board and electrically connected to the board;
The two X-axis magnet drive coils are arranged opposite to each other on the correction circuit board, and opposed to the two X-axis magnets,
The two Y-axis magnet drive coils are arranged opposite to each other on the correction circuit board, located on the adjacent side of the two X-axis magnet drive coils, and opposed to the two Y-axis magnets,
The X-axis shake detection sensor is disposed on the substrate, detects a displacement amount of one X-axis magnet in the two X-axis magnets,
The Y-axis shake detection sensor is disposed on the substrate and detects a displacement amount of one Y-axis magnet in the two Y-axis magnets.
The X-axis shake detection sensor and the Y-axis shake detection sensor are shake detection sensor elements each including a Hall sensor, a magnetic sensor, a fluxgate sensor, an optical position sensor, or an optical encoder. The elastic support structure of the optical vibration isolator described in 1.   The plurality of suspension wires, the upper leaf spring, and the lower leaf spring are conductive, and are conductive wires that transmit a driving current of the autofocus unit, and the optical image stabilizer further includes a sensor unit. The sensor unit is positioned below the compensation unit, and further includes a circuit board and an image sensor. The image sensor is disposed on the substrate, and is on the same image pickup optical axis as the movable unit. The elastic support structure for an optical image stabilizer according to claim 3, wherein An X-axis direction, a Y-axis direction, and a Z-axis direction that are perpendicular to each other are defined,
A movable portion, a compensation unit, and a plurality of first elastic members;
In the movable portion, a lens is disposed, and an imaging optical axis that is parallel to the Z-axis direction is defined,
The compensation unit is an optical image stabilization unit, and compensates for displacement of the lens in at least the Y-axis direction and the Z-axis direction caused by vibration;
By connecting each end of each of the plurality of first elastic members to the movable part and the compensation unit, the movable part is suspended and fixed along the Z-axis direction on the compensation unit,
At least one second elastic member is disposed on the movable part, and the second elastic member includes an outer peripheral side part coupled to the movable part, and an inner peripheral side part coupled to the lens. A plurality of connection ends located on the outer peripheral side portion, and at least one inner peripheral arm portion connecting between the outer peripheral side portion and the inner peripheral side portion; One end portion of the elastic member is coupled to the corresponding connection end, and between each connection end of the second elastic member and the outer peripheral side portion, an outer peripheral arm portion and at least one auxiliary portion. One end of the outer peripheral arm and the auxiliary part is connected to the connection end, and the other end of the outer arm and the auxiliary part is connected to the outer peripheral part. An optical image stabilizer that is connected. The length of the auxiliary part is longer than the length of the outer peripheral arm part,
The second elastic member and the plurality of first elastic members are independently separated members or integrally formed single members,
The first elastic member is a suspension wire, and the structure of the suspension wire has a single wire structure extending in the Z-axis direction, a structure having a repetitive S-shaped flexible portion, or a spiral spring-like flexible portion. Structure,
The second elastic member is a leaf spring, and an outer peripheral side portion of the leaf spring has a rectangular structure, and has at least two adjacent sides, and each connection end has a rectangular outer peripheral side. The said outer peripheral side arm part and the said auxiliary | assistant part are located on the two adjacent different sides of the said outer peripheral side part, respectively, located near the corner | angular part of a part, The Claim 5 characterized by the above-mentioned. Optical anti-vibration device. The leaf spring is an upper leaf spring, and the movable part is an autofocus unit,
The autofocus unit has a base, a lens holder, a coil, a plurality of magnets, a lens, a cover plate, an insulating plate, a lower leaf spring, a magnet fixing member, two X-axis magnets, and two Y-axis magnets,
The lens holder is disposed in the base table,
The coil is disposed on the outer periphery of the lens holder,
The plurality of magnets are positioned at a peripheral portion in the base and face the coil. The plurality of magnets and the coil constitute an electromagnetic drive unit, and the lens holder is driven to perform the imaging. Move along the direction of the optical axis,
The lens is located on the imaging optical axis and is disposed in the lens holder.
The lid plate covers the lens holder,
The insulating plate is disposed between the lid plate and the upper leaf spring;
The lower leaf spring is located in the base and elastically holds the lens holder together with the upper leaf spring,
The magnet fixing member is disposed at the bottom of the base and faces the compensation unit,
The two X-axis magnets are arranged opposite to each other on the magnet fixing member,
The two Y-axis magnets are disposed opposite to each other on the magnet fixing member, and are positioned on the adjacent sides of the two X-axis magnets,
The compensation unit is an optical image stabilization unit, and includes a substrate, a correction circuit board, two X-axis magnet drive coils, two Y-axis magnet drive coils, an X-axis shake detection sensor, and a Y-axis shake detection sensor.
The substrate has a circuit and faces the base.
The correction circuit board is coupled to the board and electrically connected to the board;
The two X-axis magnet drive coils are arranged opposite to each other on the correction circuit board, and opposed to the two X-axis magnets,
The two Y-axis magnet drive coils are arranged opposite to each other on the correction circuit board, located on the adjacent side of the two X-axis magnet drive coils, and opposed to the two Y-axis magnets,
The X-axis shake detection sensor is disposed on the substrate, detects a displacement amount of one X-axis magnet in the two X-axis magnets,
The Y-axis shake detection sensor is disposed on the substrate and detects a displacement amount of one Y-axis magnet in the two Y-axis magnets.
The X-axis shake detection sensor and the Y-axis shake detection sensor are shake detection sensor elements each including a Hall sensor, a magnetic sensor, a fluxgate sensor, an optical position sensor, or an optical encoder. An optical image stabilizer according to 1.   The plurality of suspension wires, the upper leaf spring, and the lower leaf spring are conductive, and are conductive wires that transmit a driving current of the autofocus unit, and the optical image stabilizer further includes a sensor unit. The sensor unit is positioned below the compensation unit, and further includes a circuit board and an image sensor. The image sensor is disposed on the substrate, and is on the same image pickup optical axis as the movable unit. The optical image stabilizer according to claim 7, wherein

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