JP2005102172A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus capable of smoothly displacing an imaging device board in the direction of a plane whose normal line is an optical axis with no rubbing or rattling. <P>SOLUTION: An imaging apparatus 1A comprises an imaging lens barrel 2 that incorporates an imaging optical system 22, an imaging device board 3 on which an imaging device 31 is mounted, a support mechanism 4 which displaceably supports the imaging device board 3 in plane direction, and an actuator 5 for displacing the imaging device board 3. The support mechanism 4 comprises a pair of first support plates 41 and 42 which are arranged parallel to each other with the imaging lens barrel 2 in between, with its rear end supported by a base part 23, a movable frame 43 supported by the front end of the first support plates 41 and 42, and a pair of second support plates 44 and 45 which are arranged parallel to each other in such an attitude as almost vertical to the first support plates 41 and 42, with the front end supported by the movable frame 43 and the rear end supported by the imaging device board 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an imaging apparatus.

  2. Description of the Related Art A camera (imaging device) having an image blur correction mechanism that corrects an image blur caused by camera shake at the time of shooting is known. An image blur correction mechanism in a conventional camera corrects image blur by driving the correction optical system eccentrically in accordance with the occurrence of camera shake (see, for example, Patent Document 1).

  However, when the image blur correction mechanism as described above is used, there is a problem that the image quality is deteriorated due to the aberration due to the eccentricity of the correction optical system. Further, since the optical system is driven, a large driving force is required for the actuator due to its weight and friction. As a result, there are problems that it is difficult to perform accurate correction control and that power consumption is large. Further, in order to prevent the backlash of the slide portion of the correction optical system from deteriorating the correction performance, fine processing and advanced assembling techniques are required, which has been a cause of cost increase.

Japanese Patent No. 2641172

  An object of the present invention is to allow an image pickup device substrate to be smoothly displaced in a surface direction with the optical axis as a normal line without causing friction and play, and is advantageous for performing image blur correction control, for example. To provide an apparatus.

Such an object is achieved by the present inventions (1) to (11) below.
(1) An imaging optical system, an imaging element substrate on which an imaging element that captures a subject image obtained by the imaging optical system is mounted, and an optical axis of the imaging optical system as a normal line with respect to the imaging element substrate as a base An imaging device comprising: a support mechanism that is displaceably supported in a surface direction; and an actuator that displaces the image sensor substrate in the surface direction,
The support mechanism is arranged in parallel with each other across the optical path of the photographing optical system, and a pair of first support plates whose rear ends are supported by the base, and
A movable frame supported by the front ends of the pair of first support plates and arranged to surround the optical path;
A pair that is arranged in parallel to each other across the optical path in a posture substantially perpendicular to the pair of first support plates, and that has a front end portion supported by the movable frame and a rear end portion that supports the imaging element substrate. A second support plate,
By displacing the pair of first support plates so as to be inclined with respect to the optical axis, the movable frame can be displaced in a first direction parallel to the surface with respect to the base portion,
When the pair of second support plates are displaced so as to be inclined with respect to the optical axis, the imaging element substrate is parallel to the surface and perpendicular to the first direction with respect to the movable frame. An imaging apparatus characterized by being displaceable.

  As a result, the image pickup device substrate can be smoothly displaced in the surface direction with the optical axis as the normal line without causing friction or play. In addition, since the support mechanism can be arranged so as to surround the optical path of the photographing optical system, the installation space is small, and compared with the case where it is arranged on the outer peripheral side or the back side of the image sensor substrate, It is easy to secure. Therefore, the image pickup apparatus can be reduced in size, and thus the optical apparatus equipped with the image pickup apparatus can be reduced in size. In addition, since the above effect can be achieved by a support mechanism that is simple in structure, has a small number of parts, and is easy to assemble, the manufacturing cost can be reduced.

  (2) The control unit according to (1), further including a control unit that controls the position of the imaging device substrate so that image blurring when the imaging device captures a subject image is corrected by driving the actuator. Imaging device.

  Thus, image blur due to camera shake during shooting can be prevented, and an image with less image blur can be captured. In particular, since the above support mechanism is used, it is possible to prevent friction, backlash, etc. from degrading the accuracy of image blur correction control or destabilizing the control, and always accurate image blur correction control. It can be performed. Further, since the support mechanism is lightweight, the inertia when displacing the image sensor substrate is small, and therefore, smooth and stable high-accuracy image blur correction control characteristics can be easily obtained. Further, coupled with the absence of frictional resistance, it is possible to reduce power consumption during image blur correction control.

(3) having a photographic lens barrel incorporating the photographic optical system;
The imaging device according to (1) or (2), wherein the base portion is provided at a rear end portion of the photographing lens barrel, and the movable frame is located on an outer peripheral portion of the photographing lens barrel.

  As a result, the installation space for the support mechanism can be further reduced, and the structure can be further simplified, so that the imaging apparatus can be reduced in size and the structure can be rationalized.

(4) The imaging according to any one of (1) to (3), wherein the pair of first support plates and the pair of second support plates are displaced to be inclined with respect to the optical axis by being bent. apparatus.
Thereby, the structure of the support mechanism can be further simplified and the weight can be reduced.

(5) The front end portion and the rear end portion of the pair of first support plates and the pair of second support plates are respectively connected to a counterpart via a hinge structure portion, and the pair of first support plates and The imaging device according to any one of (1) to (3), wherein the pair of second support plates are displaced so as to be inclined with respect to the optical axis when the hinge structure portion is bent.
Thereby, the image sensor substrate can be displaced more accurately and smoothly.

(6) The actuator is provided on the imaging device substrate and generates a force in the first direction, and a second coil is provided on the imaging device substrate and generates a force in the second direction. The imaging device according to any one of (1) to (5), including a coil and a field generation unit that generates a field for the first coil and the second coil.
As a result, the actuator can be configured with a simple and lightweight structure.

  (7) Any of the above (1) to (6), wherein the pair of first support plates and the pair of second support plates have substantially the same length in the optical axis direction. The imaging device described in 1.

  Thereby, a slight amount of displacement backward in the optical axis direction when the image pickup device substrate is displaced by a certain amount in the first direction and forward in the optical axis direction when the image pickup device substrate is displaced by the same amount in the second direction. The slight amount of displacement completely matches. Therefore, when the image pickup device substrate is displaced by the same amount in the first direction and the second direction, the displacement amounts of both are completely canceled, and the displacement amount of the image pickup device substrate in the optical axis direction is completely eliminated. Therefore, the occurrence of image blur can be effectively reduced.

  (8) One or both of the pair of second support plates is configured by a flexible printed circuit board or a flexible flat cable for performing power feeding and / or signal transmission / reception with respect to the imaging element substrate. ).

  As a result, there is no need to install a flexible printed circuit board or the like for power supply and signal transmission / reception to / from the image pickup device substrate separately from the support plate, so that it is possible to reduce the number of components, facilitate assembly, and reduce manufacturing costs. In addition, when the image pickup device substrate is displaced in the first direction and the second direction, the flexible print substrate or the like moves when the image pickup device substrate is displaced in the first direction or the second direction, compared to a case where a flexible print substrate dedicated for power feeding and signal transmission / reception is separately connected to the image pickup device substrate. Can be displaced more smoothly.

  (9) One or both of the pair of first support plates is configured by a flexible printed circuit board or a flexible flat cable for performing power feeding and / or signal transmission / reception with respect to the imaging element substrate. The flat cable is the imaging device according to (8), wherein the flat cable is electrically connected to a flexible printed board or a flexible flat cable constituting the second support plate on the movable frame.

  As a result, the number of parts can be further reduced, the assembly can be facilitated, and the manufacturing cost can be reduced, and the connecting portion does not affect the movement of the image sensor substrate.

  (10) A lead-out portion for connecting the flexible printed board or the flexible flat cable constituting the first support plate to another circuit board is drawn out from a portion in the vicinity of the base portion of the flexible printed board or the flexible flat cable. The imaging apparatus according to (9).

  Thereby, since the drawer part is pulled out from the base part which is a non-moving part, the drawer part does not affect the displacement of the first support plate, and thus the image sensor substrate can be displaced more smoothly.

  (11) The imaging device according to any one of (8) to (10), wherein the flexible printed circuit board or the flexible flat cable has a wiring pattern that is symmetrical via a center line along the optical axis direction. .

  Thereby, since the elastic distribution of the flexible printed circuit board or the flexible flat cable is symmetric with respect to the center line along the optical axis direction, the flexible printed circuit board or the flexible flat cable can be more reliably prevented from being twisted when bent. As a result, the image sensor substrate can be accurately displaced in the surface direction.

  According to the present invention, the image pickup device substrate can be smoothly displaced in the surface direction with the optical axis as a normal line without causing friction or play. In addition, since the support mechanism can be arranged so as to surround the optical path of the photographing optical system, the installation space is small, and compared with the case where it is arranged on the outer peripheral side or the back side of the image sensor substrate, It is easy to secure. Therefore, the image pickup apparatus can be reduced in size, and thus the optical apparatus equipped with the image pickup apparatus can be reduced in size. In addition, since the above effect can be achieved by a support mechanism that is simple in structure, has a small number of parts, and is easy to assemble, the manufacturing cost can be reduced.

  For this reason, for example, when image blur correction control is performed by displacing the image sensor substrate in the surface direction, highly accurate control can be performed.

Hereinafter, an imaging device of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.
<First Embodiment>
FIG. 1 is a perspective view showing a first embodiment of the imaging apparatus of the present invention, and FIG. 2 is a block diagram showing a circuit configuration of control means for performing image blur correction control in the imaging apparatus shown in FIG. In the following, for the sake of convenience, the upper side in FIG. 1 is “upper”, the lower side is “lower”, the left side (left diagonally lower side) in FIG. 1 is “front”, and the right side (right diagonally upper side) is “back”. Will be described.

  An imaging apparatus 1A shown in FIG. 1 can be mounted on an optical device such as an electronic camera, binoculars with an electronic camera, and a telescope with an electronic camera. The imaging apparatus 1A includes a photographic lens barrel 2, an imaging element substrate 3, a support mechanism 4 that supports the imaging element substrate 3, and an actuator 5 that displaces the imaging element substrate 3.

  The taking lens barrel 2 includes a cylindrical barrel body 21 and a shooting optical system 22 installed in the barrel body 21. The lens barrel main body 21 is fixed so as not to move within the main body of an optical device (not shown) (hereinafter simply referred to as “optical device main body”) on which the imaging device 1A is mounted. In addition, a rectangular flange-shaped base portion 23 is provided on the outer peripheral portion of the rear end of the barrel main body 21.

  An imaging element substrate 3 is installed behind the photographic lens barrel 2. On the image pickup device substrate 3, an image pickup device 31 such as a CCD (Charge Coupled Device) for picking up a subject image obtained by the photographing optical system 22 is mounted.

  The image pickup device substrate 3 is supported by the support mechanism 4 so as to be displaceable in a plane direction with the optical axis 221 of the photographing optical system 22 as a normal line with respect to the base 23. Hereinafter, the support mechanism 4 will be described.

  The support mechanism 4 includes a pair of first support plates 41 and 42, a movable frame 43, and a pair of second support plates 44 and 45.

  The first support plates 41 and 42 are each composed of a flat plate having flexibility (elasticity), and are arranged in parallel to each other with the optical path (lens barrel main body 21) of the photographing optical system 22 interposed therebetween. . The rear ends of the first support plates 41 and 42 are supported by the base 23. Although the fixing method with respect to the base 23 of the rear-end part of the 1st support plates 41 and 42 is not specifically limited, In the structure of illustration, it fixes with the screw 46.

  The constituent material of the first support plates 41 and 42 is not particularly limited, and various metal materials and various resin materials can be used alone or in combination. Among them, a viewpoint of obtaining appropriate flexibility (elasticity). Preferred materials include, for example, metal materials such as aluminum or aluminum alloys, titanium or titanium alloys, polyolefins such as polyvinyl chloride, polyethylene, polypropylene and polybutadiene, polyethylene terephthalate (PET), and polybutylene terephthalate (PBT). Examples thereof include resin materials such as polyester.

  A movable frame 43 is supported on the front end portions of the first support plates 41 and 42. The movable frame 43 has a substantially rectangular or square frame shape and is disposed so as to surround the optical path (lens barrel body 21) of the photographing optical system 22. Two parallel sides of the movable frame 43 are fixed to the front end portions of the first support plates 41 and 42, respectively. The fixing method is not particularly limited, but is fixed by screws 46 in the illustrated configuration.

  In a state where the center of the movable frame 43 coincides with the optical axis 221, the first support plates 41 and 42 are parallel to the optical axis 221. From this state, the first support plates 41 and 42 can be displaced to be inclined with respect to the optical axis 221 by bending. When the first support plates 41 and 42 are displaced so as to be inclined with respect to the optical axis 221, the movable frame 43 is in a direction parallel to a plane normal to the optical axis 221 with respect to the base 23 (hereinafter referred to as “first Direction)). The first direction is a direction perpendicular to the first support plates 41 and 42 when the first support plates 41 and 42 are parallel to the optical axis 221.

  On the other hand, even if the first support plates 41 and 42 are displaced so as to be inclined with respect to the optical axis 221, the movable frame 43 is parallel to the plane having the optical axis 221 as a normal line with respect to the base 23 and in the first direction. It is not displaced in a direction perpendicular to (hereinafter referred to as “second direction”). Therefore, the movable frame 43 can be displaced smoothly and accurately in the first direction without rattling in the second direction.

  The second support plates 44 and 45 are each formed of a flat thin plate, and are substantially perpendicular to the first support plates 41 and 42 and are parallel to each other with the optical path (lens barrel body 21) of the imaging optical system 22 interposed therebetween. Is arranged. The front end portions of the second support plates 44 and 45 are supported by the movable frame 43. The front end portions of the second support plates 44 and 45 are fixed to two sides perpendicular to the two sides of the movable frame 43, respectively. The fixing method is not particularly limited, but is fixed by screws 46 in the illustrated configuration.

  The constituent material of the second support plates 44 and 45 is not particularly limited, and the same material as the first support plates 41 and 42 can be used.

  The imaging element substrate 3 is supported at the rear end portions of the second support plates 44 and 45. The method for fixing the rear end portions of the second support plates 44 and 45 and the image pickup device substrate 3 is not particularly limited, and examples thereof include screw fixing, adhesion using an adhesive, and fusion.

  In a state where the centers of the movable frame 43 and the image sensor 31 coincide with the optical axis 221, the second support plates 44 and 45 are parallel to the optical axis 221. From this state, the second support plates 44 and 45 can be displaced so as to be inclined with respect to the optical axis 221 by bending. When the second support plates 44 and 45 are displaced so as to be inclined with respect to the optical axis 221, the imaging element substrate 3 is displaced in the second direction with respect to the movable frame 43.

  On the other hand, even if the second support plates 44 and 45 are displaced so as to be inclined with respect to the optical axis 221, the image pickup device substrate 3 is not displaced in the first direction with respect to the movable frame 43. Therefore, the image pickup device substrate 3 can be smoothly and accurately displaced in the second direction without rattling in the first direction with respect to the movable frame 43.

  As described above, in the support mechanism 4, the movable frame 43 can be displaced in the first direction with respect to the base 23, and the imaging element substrate 3 can be displaced in the second direction with respect to the movable frame 43. . By combining these two displacements, the image pickup device substrate 3 is moved in the first direction and the second direction from the position where the center of the image pickup device 31 coincides with the optical axis 221 (hereinafter referred to as “center position”). Displaceable. That is, the image pickup device substrate 3 can be displaced in a plane direction with the optical axis 221 as a normal line inside the optical apparatus main body.

  The actuator 5 includes a first actuator 51 that applies a force in the first direction to the image sensor substrate 3 and a second actuator 52 that applies a force in the second direction.

  The first actuator 51 includes a first coil 53 formed as a double-sided pattern or a multilayer pattern, for example, on the imaging element substrate 3, and a first field generation unit 54 that generates a field for the first coil 53. . The first field generating unit 54 includes a magnet 541 and a yoke 542 that holds the magnet 541, and is fixed inside the optical apparatus main body.

  The second actuator 52 has the same configuration as that of the first actuator 51 except that the orientation of the second actuator 52 is different from that of the first actuator 51. The second actuator 52 has a second coil 55 formed as a double-sided pattern or a multilayer pattern on the imaging device substrate 3, The second field generator 56 generates a field for the two coils 55. The second field generation unit 56 includes a magnet 561 and a yoke 562 that holds the magnet 561, and is fixed inside the optical apparatus main body.

  When a current in a predetermined direction is applied to the first coil 53 of the actuator 5 as described above, the first actuator 51 applies a right or leftward force in FIG. As a result, the image pickup device substrate 3 is displaced in that direction. Further, when a current in a direction opposite to the predetermined direction is applied to the first coil 53, the first actuator 51 applies a force in the first direction and in the opposite direction to the imaging element substrate 3, thereby imaging. The element substrate 3 is displaced in that direction.

  Similarly, when a current in a predetermined direction is supplied to the second coil 55, the second actuator 52 applies an upward or downward force in FIG. 1 to the imaging element substrate 3 in the second direction, whereby imaging is performed. The element substrate 3 is displaced in that direction. Further, when a current in a direction opposite to the predetermined direction is applied to the second coil 55, the second actuator 52 applies a force in the second direction in the second direction and in the opposite direction to the image pickup device substrate 3. The element substrate 3 is displaced in that direction.

  In this manner, the actuator 5 can apply a force to the image sensor substrate 3 in any direction in the plane direction normal to the optical axis 221 and displace the image sensor substrate 3 in that direction. be able to.

  The image pickup apparatus 1A includes a displacement amount detection unit 6 that detects a displacement amount from the center position of the image pickup device substrate 3 (image pickup device 31). The displacement amount detection means 6 includes a light emitting element 61 configured by, for example, a light emitting diode that projects detection light toward the small hole 32 formed in the imaging element substrate 3, and the detection light passes through the small hole 32. And a two-dimensional PSD (Position Sensitive Detector) 62 for detecting the position of the spot light. The light emitting element 61 and the two-dimensional PSD 62 are fixed so as not to move inside the optical apparatus main body. When the image pickup device substrate 3 is displaced in the first direction and the second direction, the incident position of the spot light on the light receiving surface of the two-dimensional PSD 62 changes accordingly in the first direction and the second direction. . Therefore, the displacement amount detection means 6 can detect the displacement amounts of the image sensor substrate 3 in the first direction and the second direction, respectively.

  A signal output from the two-dimensional PSD 62 is input to an arithmetic circuit (PSD signal processing circuit) 63. The arithmetic circuit 63 outputs a signal (voltage value) indicating the amount of displacement of the image sensor substrate 3.

  The image pickup apparatus 1 </ b> A includes a control unit 7 that controls the position of the image pickup device substrate 3 so as to correct image blur when the image pickup device 31 picks up a subject image by driving the actuator 5. The control means 7 has a first controller that controls the first actuator 51 and a second controller that controls the second actuator 52. Since both have the same configuration, they are represented below. Only the first controller will be described.

  As shown in FIG. 2, the first controller in the control means 7 has a differential amplifier circuit 71. The differential amplifier circuit 71 applies negative feedback from the output side of the operational amplifier 711 to the input side of the operational amplifier 711, the resistor 712 connected to the inverting input terminal of the operational amplifier 711, the resistor 713 connected to the non-inverting input terminal. And a feedback resistor 714. The first coil 53 of the first actuator 51 is connected to the output side of the differential amplifier circuit 71.

  A signal indicating the displacement amount in the first direction of the image sensor substrate 3 output from the arithmetic circuit 63 is input to the inverting input terminal of the operational amplifier 711 via the resistor 712. This signal is also input to the differentiating circuit 72 and differentiated to generate a signal indicating the moving speed of the image sensor substrate 3 in the first direction. This signal is input to the inverting input terminal of the operational amplifier 711 via the resistor 73.

  A gyro sensor (angular velocity sensor) 8 is installed in the optical apparatus main body. The signal indicating the camera shake speed in the first direction output from the gyro sensor 8 is input to the integration circuit 74 and integrated to generate a signal indicating the amount of camera shake in the first direction. This signal is input to the non-inverting input terminal of the operational amplifier 711 via the resistor 713.

  With such a configuration, a voltage proportional to the difference between the amount of camera shake in the first direction and the amount of displacement of the imaging element substrate 3 in the first direction is applied to the first coil 53. As a result, the image pickup device substrate 3 is displaced in the first direction so as to follow the amount of camera shake in the first direction, whereby the image shake in the first direction when the image pickup device 31 picks up the subject image. Is corrected.

  In the present embodiment, the differential circuit 72 and the resistor 73 are provided so that the moving speed signal in the first direction of the image pickup device substrate 3 is fed back, so that even when the camera shake speed is high, The above control can be performed more stably and accurately.

  The energization of the second coil 55 is also controlled in the same manner as described above. Accordingly, the image pickup device substrate 3 is displaced in the second direction so as to follow the amount of camera shake in the second direction, and the image shake in the second direction when the image pickup device 31 picks up the subject image is the same. It is corrected.

  As described above, the control means 7 of the present embodiment is configured by an analog controller including an analog electronic circuit, but is not limited thereto, and is configured by a digital controller that realizes a control algorithm by software based on a program. It may be.

  According to the support mechanism 4 in the imaging apparatus 1A as described above, since the slide structure and the fitting structure are not used, when the imaging element substrate 3 is displaced in the plane direction with the optical axis 221 as the normal line, friction or It can be displaced smoothly and accurately without backlash or tilting. Accordingly, it is possible to prevent friction, play, and the like from degrading the accuracy of the image blur correction control or destabilizing the control, so that accurate image blur correction control can always be performed.

  Furthermore, since the support mechanism 4 is lightweight, the inertia when displacing the image pickup device substrate 3 is small, and therefore, smooth and stable high-accuracy image blur correction control characteristics can be easily obtained. Further, coupled with the absence of frictional resistance, it is possible to reduce power consumption during image blur correction control.

  Further, since the support mechanism 4 can be disposed so as to surround the optical path (the photographing lens barrel 2) of the photographing optical system 22, it requires less installation space, and is disposed on the outer peripheral side or the back side of the image pickup device substrate 3. The installation space can be easily secured as compared with the case where it is used. Therefore, the size of the image pickup apparatus 1A can be reduced, and as a result, the optical apparatus on which the image pickup apparatus 1A is mounted can be reduced in size.

  Further, the support mechanism 4 has a simple structure, has a small number of parts, and is easy to assemble, so that the manufacturing cost can be reduced.

  In the support mechanism 4, when the image sensor substrate 3 is displaced in the first direction or the second direction, the image sensor substrate 3 is slightly displaced in the direction of the optical axis 221, and image blur may occur. As will be described below, this blur amount is negligible and does not cause a problem.

  For example, when the size of the image sensor 31 is 1/3 inch, the focal length of the imaging optical system 22 is 50 mm (250 mm in terms of 35 mm film camera), and the F value is F4, the image sensor substrate 3 driven by image blur correction control is used. The displacement is at most about ± 0.3 mm. Under this condition, when the imaging element substrate 3 is displaced by 0.3 mm in the second direction and the length of the second support plates 44 and 45 in the optical axis 221 direction is 20 mm, the imaging element substrate 3 is Then, it approaches 15 μm toward the photographing optical system 22. As a result, the blur amount of the image increases by 4 μm, which is a negligible amount. Further, when the image pickup device substrate 3 is displaced in the first direction, the image pickup device substrate 3 is displaced in a direction away from the photographing optical system 22 contrary to the above case. In the case of displacement in each of the direction and the second direction, the amount of displacement of the image pickup device substrate 3 in the direction of the optical axis 221 cancels out, and the amount of image blur is further reduced.

Second Embodiment
FIG. 3 is a perspective view showing a second embodiment of the image pickup apparatus of the present invention, and FIG. 4 is a block diagram showing a circuit configuration of control means for performing image blur correction control in the image pickup apparatus shown in FIG.

  Hereinafter, the second embodiment of the imaging apparatus of the present invention will be described with reference to these drawings. However, the description will focus on differences from the above-described embodiment, and the description of the same matters will be omitted.

  In the imaging apparatus 1 </ b> B of the present embodiment, the front end portions and the rear end portions of the first support plates 41 and 42 and the second support plates 44 and 45 are respectively connected to the other party via hinge structure portions 47. That is, the rear end portions of the first support plates 41 and 42 are respectively fixed to the base portion 23 via the hinge structure portion 47, and the front end portions of the first support plates 41 and 42 are respectively connected to the hinge structure portion 47. The front end portions of the second support plates 44 and 45 are fixed to the movable frame 43 via hinge structures 47, respectively, and the second support plates 44 and 45 are fixed to the movable frame 43. The rear end portions are respectively fixed to the image sensor substrate 3 via the hinge structure portion 47.

  In the present embodiment, the first support plates 41 and 42 and the second support plates 44 and 45 may be substantially rigid bodies that do not have flexibility.

  The first support plates 41 and 42 and the second support plates 44 and 45 are displaced so as to be inclined with respect to the optical axis 221 as the hinge structure portions 47 are bent. And in the second direction.

  With such a configuration, in this embodiment, the image sensor substrate 3 can be displaced more accurately and smoothly.

  The constituent materials of the first support plates 41 and 42 and the second support plates 44 and 45 in the present embodiment are not particularly limited, and various metal materials and various resin materials can be used alone or in combination. Examples of preferable materials from the viewpoint of obtaining appropriate rigidity include metal materials such as stainless steel, copper, and copper-based alloys, rigid polyvinyl chloride, polystyrene, poly- (4-methylpentene-1), polycarbonate, and ABS. Resin, acrylic resin, polymethylmethacrylate (PMMA), polyacetal, polyarylate, polyacrylonitrile, polyvinylidene fluoride, ionomer, polyester such as acrylonitrile-butadiene-styrene copolymer, butadiene-styrene copolymer, aromatic or fat Group polyamide, polytetrafur Resin material such as fluorine-based resin such as Roechiren like.

  The image pickup device substrate 3 is provided with a first speed detection coil 33 for detecting the speed in the first direction and a second speed detection coil 34 for detecting the speed in the second direction. Yes. Further, in the optical device main body, a first speed detection field generation unit 11 that generates a field for the first speed detection coil 33 and a field for the second speed detection coil 34 are generated. The second speed detection field generator 12 is fixed. When the image pickup device substrate 3 moves in the first direction and the second direction, an electromotive force corresponding to the moving speed is generated in the first speed detection coil 33 and the second speed detection coil 34. Thereby, the speed in the first direction and the speed in the second direction of the image sensor substrate 3 can be detected.

  As shown in FIG. 4, in the control means 7 ′ of this embodiment, instead of the differentiation circuit 72 and the resistor 73 in the first embodiment, the first image sensor substrate 3 generated in the first speed detection coil 33 is used. The speed signal in the direction 1 is fed back to the inverting input terminal of the operational amplifier 711 through the speed feedback adjustment resistor 75. With such a configuration, compared to the first embodiment, noise is less likely to occur in the speed signal, and the control system can be further stabilized.

<Third Embodiment>
FIG. 5 is a perspective view showing a third embodiment of the image pickup apparatus of the present invention, and FIG. 6 is a development view of the first support plate, the second support plate, and the connecting portion of the image pickup apparatus shown in FIG. Hereinafter, the third embodiment of the imaging apparatus according to the present invention will be described with reference to these drawings, but the description will focus on the differences from the first embodiment described above, and the description of the same matters will be omitted.

  In the imaging apparatus 1C of the present embodiment, the first support plates 41 ′ and 42 ′ and the second support plates 44 ′ and 45 ′ are flexible printed boards for performing power feeding and signal transmission / reception with respect to the imaging element substrate 3, respectively. Or it is comprised with the flexible flat cable (henceforth "a flexible printed circuit board" etc.).

  Note that the flexible printed circuit board and the like constituting the first support plates 41 ′ and 42 ′ and the second support plates 44 ′ and 45 ′ may or may not be reinforced with backing.

  The flexible printed circuit board or the like constituting the first support plate 41 ′ and the flexible printed circuit board or the like constituting the second support plate 44 ′ are electrically connected at the connection portion 48 located on the outer periphery of the corner of the movable frame 43. It is connected to one piece.

  From the portion on the base 23 of the first support plate 41 ′, a lead-out portion 13 for connecting a flexible printed circuit board or the like constituting the first support plate 41 ′ to another circuit board is drawn out. Since the base portion 23 is a portion that does not move, the drawer portion 13 does not affect the displacement of the first support plate 41 ′, and thus the image sensor substrate 3 can be displaced more smoothly.

  Although not visible in FIG. 5, similarly, the flexible printed circuit board constituting the first support plate 42 ′ and the flexible printed circuit board constituting the second support plate 45 ′ are also formed at the corners of the movable frame 43. It is electrically connected at the connection part located on the outer peripheral part and connected to one sheet. From the portion of the first support plate 42 ′ on the base 23, a lead-out portion for connecting a flexible printed circuit board or the like constituting the first support plate 42 ′ to another circuit board is drawn out.

  As described above, in the present embodiment, the first support plates 41 ′ and 42 ′ and the second support plates 44 ′ and 45 ′ configured by a flexible printed circuit board or the like are used to supply power and send and receive signals to the image sensor substrate 3. be able to. Therefore, there is no need to install a flexible printed circuit board or the like for power feeding and signal transmission / reception with respect to the image pickup device substrate 3 separately from the support plate, so that it is possible to reduce the number of components, facilitate assembly, and reduce manufacturing costs.

  Further, when the image pickup device substrate 3 is displaced in the first direction and the second direction as compared with a case where a flexible print substrate dedicated for power supply and signal transmission / reception is separately connected to the image pickup device substrate 3, the flexible print substrate etc. Since the movement is not affected by the movement, it can be displaced more smoothly.

As shown in FIG. 6, the wiring pattern of the flexible printed circuit board or the like constituting the first support plate 41 ′ is substantially symmetric in the plane through the center line O ₁ that is parallel to the optical axis 221 in the assembled state. ing. In addition, the wiring pattern of the flexible printed circuit board or the like constituting the second support plate 44 ′ is substantially symmetric in the plane via the center line O ₂ that is parallel to the optical axis 221 in the assembled state.

  Although not shown, in the same manner, the wiring pattern of the flexible printed circuit board or the like constituting the first support plate 42 ′ is also almost symmetrical in the plane through the center line parallel to the optical axis 221 in the assembled state. In addition, the wiring pattern such as a flexible printed circuit board constituting the second support plate 45 ′ is also almost symmetrical in the plane through a center line parallel to the optical axis 221 in the assembled state.

  With this configuration, the elastic distributions of the first support plates 41 ′ and 42 ′ and the second support plates 44 ′ and 45 ′ are symmetric through a center line parallel to the optical axis 221 in the assembled state. When 1 support plate 41 ', 42' or 2nd support plate 44 ', 45' bends, it can prevent more reliably that they are twisted. As a result, the image sensor substrate 3 can be accurately displaced in the first direction and the second direction.

  In the present embodiment, all four of the first support plates 41 ′ and 42 ′ and the second support plates 44 ′ and 45 ′ are formed of a flexible substrate or the like. (3 sheets) may be composed of a flexible substrate or the like, and the rest may be composed of a simple support plate having no wiring.

<Fourth embodiment>
FIG. 7 is a perspective view showing a fourth embodiment of the imaging apparatus of the present invention. Hereinafter, the fourth embodiment of the imaging apparatus of the present invention will be described with reference to this figure. However, the difference from the first embodiment will be mainly described, and the description of the same matters will be omitted.

In the imaging apparatus 1D of the present embodiment, the movable frame 43 ′ has offset portions 431 that are offset backward in the direction of the optical axis 221 on the two sides to which the second support plates 44 and 45 are fixed, respectively. The front end portions of the second support plates 44 and 45 are fixed to the offset portion 431. Thus, the optical axis 221 direction substantially the length of the first support plate 41 and 42 (the length indicated by _{L 1} in FIG. 7), the optical axis 221 direction substantially of the second support plate 44, 45 the length of the (length indicated by L ₂ in FIG. 7) are the same.

  With such a configuration, when the image pickup device substrate 3 is displaced by a certain amount in the first direction, a slight amount of displacement backward in the optical axis 221 direction and when the image pickup device substrate 3 is displaced by the same amount in the second direction. The amount of slight displacement forward in the direction of the optical axis 221 completely coincides. Therefore, when the image pickup device substrate 3 is displaced by the same amount in the first direction and the second direction, both displacement amounts are completely canceled out, and the displacement amount of the image pickup device substrate 3 in the optical axis 221 direction is reduced. Since it can be eliminated completely, the occurrence of image blur can be effectively reduced.

  The image pickup apparatus of the present invention has been described above with respect to the illustrated embodiment. However, the present invention is not limited to this, and each component constituting the image pickup apparatus has an arbitrary configuration that can exhibit the same function. Can be substituted. Moreover, arbitrary components may be added.

  For example, the actuator that displaces the image pickup device substrate in the plane direction is not limited to the one configured with the movable coil as in the above-described embodiment, and may be configured with a piezoelectric actuator, an electrostatic actuator, or the like.

  Further, the imaging apparatus of the present invention may be a combination of any two or more configurations (features) of the above embodiments.

  In the imaging apparatus of the present invention, the purpose of displacing the imaging element substrate in the plane direction by the support mechanism is not limited to performing image blur correction control, but may be any purpose, for example, for the purpose of performing shift photography. There may be.

1 is a perspective view showing a first embodiment of an imaging apparatus of the present invention. FIG. 2 is a block diagram illustrating a circuit configuration of a control unit that performs image blur correction control in the imaging apparatus illustrated in FIG. 1. It is a perspective view which shows 2nd Embodiment of the imaging device of this invention. FIG. 4 is a block diagram illustrating a circuit configuration of a control unit that performs image blur correction control in the imaging apparatus illustrated in FIG. 3. It is a perspective view which shows 3rd Embodiment of the imaging device of this invention. FIG. 6 is a development view of a first support plate, a second support plate, and a connection portion of the imaging device shown in FIG. 5. It is a perspective view which shows 4th Embodiment of the imaging device of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A, 1B, 1C, 1D Image pick-up device 11 1st speed detection field generation part 12 2nd speed detection field generation part 13 Drawer part 2 Shooting lens barrel 21 Lens barrel main body 22 Shooting optical system 221 Optical axis 23 base 3 image pickup device substrate 31 image pickup device 32 small hole 33 first speed detection coil 34 second speed detection coil 4 support mechanism 41, 42, 41 ′, 42 ′ first support plate 43 movable frame 43 ′ movable Frame 431 Offset portion 44, 45, 44 ′, 45 ′ Second support plate 46 Screw 47 Hinge structure portion 48 Connection portion 5 Actuator 51 First actuator 52 Second actuator 53 First coil 54 First field generating portion 541 Magnet 542 Yoke 55 Second coil 56 Second field generating section 561 Magnet 562 Yoke 6 Displacement detecting means 61 Light emitting element 62 Two-dimensional PSD
63 arithmetic circuit 7 control means 7 'control means 71 differential amplifier circuit 711 operational amplifier 712, 713 resistance 714 feedback resistance 72 differentiation circuit 73 resistance 74 integration circuit 75 speed feedback adjustment resistance 8 gyro sensor

Claims (11)

An image pickup optical system, an image pickup element substrate on which an image pickup element for picking up a subject image obtained by the image pickup optical system is mounted, and a surface direction in which the optical axis of the image pickup optical system is normal to the image pickup element substrate An image pickup apparatus comprising: a support mechanism that is displaceably supported; and an actuator that displaces the image pickup element substrate in the surface direction,
The support mechanism is arranged in parallel with each other across the optical path of the photographing optical system, and a pair of first support plates whose rear ends are supported by the base, and
A movable frame supported by the front ends of the pair of first support plates and arranged to surround the optical path;
A pair that is arranged in parallel to each other across the optical path in a posture substantially perpendicular to the pair of first support plates, and that has a front end portion supported by the movable frame and a rear end portion that supports the imaging element substrate. A second support plate,
By displacing the pair of first support plates so as to be inclined with respect to the optical axis, the movable frame can be displaced in a first direction parallel to the surface with respect to the base portion,
When the pair of second support plates are displaced so as to be inclined with respect to the optical axis, the imaging element substrate is in a second direction parallel to the surface and perpendicular to the first direction with respect to the movable frame. An imaging apparatus characterized by being displaceable.   The image pickup apparatus according to claim 1, further comprising a control unit that controls the position of the image pickup device substrate so that image blurring when the image pickup device picks up a subject image is corrected by driving the actuator. A photographic lens barrel containing the photographic optical system;
The imaging apparatus according to claim 1, wherein the base is provided at a rear end portion of the photographing lens barrel, and the movable frame is located on an outer peripheral portion of the photographing lens barrel.   The imaging device according to claim 1, wherein the pair of first support plates and the pair of second support plates are displaced so as to be inclined with respect to the optical axis by bending.   Front end portions and rear end portions of the pair of first support plates and the pair of second support plates are respectively connected to counterparts via hinge structure portions, and the pair of first support plates and the pair of first support plates The imaging device according to claim 1, wherein the second support plate is displaced so as to be inclined with respect to the optical axis when the hinge structure portion is bent.   The actuator is provided on the imaging device substrate and generates a force in the first direction; a second coil is provided on the imaging device substrate and generates a force in the second direction; The imaging device according to claim 1, comprising: a field generation unit that generates a field for the first coil and the second coil.   The imaging device according to claim 1, wherein the pair of first support plates and the pair of second support plates have substantially the same length in the optical axis direction.   8. One or both of the pair of second support plates are configured by a flexible printed circuit board or a flexible flat cable for performing power feeding and / or signal transmission / reception with respect to the imaging element substrate. Imaging device.   One or both of the pair of first support plates is configured by a flexible printed circuit board or a flexible flat cable for performing power feeding and / or signal transmission / reception with respect to the imaging element substrate, and the flexible printed circuit board or the flexible flat cable is The imaging apparatus according to claim 8, wherein the imaging apparatus is electrically connected to a flexible printed board or a flexible flat cable constituting the second support plate on or in the vicinity of the movable frame.   A drawer part for connecting a flexible printed circuit board or a flexible flat cable constituting the first support plate to another circuit board is drawn out from a portion in the vicinity of the base part of the flexible printed circuit board or the flexible flat cable. Item 10. The imaging device according to Item 9.   The imaging apparatus according to claim 8, wherein the flexible printed circuit board or the flexible flat cable has a substantially symmetric wiring pattern via a center line along the optical axis direction.

Images