JP5106254B2 - Optical device for photography - Google Patents

Description

  The present invention relates to a photographing optical apparatus that corrects camera shake by swinging a module on which a lens and an image sensor are mounted.

In a photographing optical device mounted on a portable device such as a portable device, camera shake tends to occur during photographing. Therefore, as shown in FIG. 14, the subject side end of the movable module 1081 in which the lens 1083 and the image sensor 1085 are supported on the support 1082 are supported by the fixed body 1089 by the elastic body 1088, while the side surface of the movable module 1081. The actuator 1087 is arranged at the end of the movable module 1081 opposite to the subject side (the end on the image sensor side) as indicated by an arrow P based on the detection result of the camera shake detection sensor 1086. There has been proposed a method of correcting camera shake by swinging (see Patent Document 1).
JP 2007-129295 A

  However, the method of swinging the end of the movable module on the image sensor side like the camera shake correction mechanism described in Patent Document 1 has a problem that the movable module cannot be swinged properly. That is, since a flexible wiring member such as a flexible board or a resin-coated lead wire electrically connected to the imaging element or the camera shake detection sensor is drawn from the end of the movable module on the imaging element side, the movable module Since the flexible wiring member must be elastically deformed in order to swing the end portion of the image pickup element, it is difficult to quickly swing the movable module. In addition, when the end of the movable module on the image sensor side is swung, the flexible wiring member is also elastically deformed, so that the shape return force of the flexible wiring member causes the end of the movable module on the image sensor side. Since extra force is applied and the magnitude of the shape restoring force varies depending on the deformation state of the flexible wiring member, it is difficult to properly swing the end of the movable module on the image sensor side. is there. In particular, when a magnetic drive mechanism is used as an actuator for camera shake correction, the movable module is driven elastically and in a non-contact manner compared to the case where a piezoelectric element is used as in the configuration described in Patent Document 1. Therefore, there is a problem that it is easily influenced by the flexible wiring member.

  In view of the above problems, the first object of the present invention is to swing a movable module equipped with a lens and an image sensor, and further a movable module equipped with a camera shake detection sensor in addition to the lens and the image sensor. An object of the present invention is to provide an imaging optical device that is less susceptible to the deformation of a flexible wiring member drawn out from a movable module when correcting camera shake.

  Next, a second problem of the present invention is to provide a photographing optical device that can cause the camera shake detection sensor to exhibit high sensitivity even when the camera shake detection sensor is arranged on the movable module side.

  Next, a third object of the present invention is to provide a photographing optical device capable of swingably supporting a movable module with a simple configuration.

  Next, a fourth object of the present invention is to provide an imaging optical device capable of efficiently magnetically driving a movable module.

  Next, a fifth problem of the present invention is to provide a photographing optical device capable of efficiently magnetically driving a movable module even when an additional module having a shutter mechanism is provided.

  Next, a sixth problem of the present invention is to provide a photographing optical device capable of preventing the movable module from colliding violently with the fixed body.

In order to solve the above-described problems, in the present invention, a movable module in which a lens and an image pickup element located on the opposite side of the subject from the lens are supported on a support, and a fixed body that supports the movable module. And a camera shake detection sensor that detects the tilt of the movable module, and a camera shake correction mechanism that corrects camera shake by swinging the movable module on the fixed body based on a detection result of the camera shake detection sensor. Optical device
A flexible wiring member for an image sensor that is electrically connected to the image sensor is pulled out from the end of the movable module opposite to the subject side ,
The camera shake correction mechanism includes: a swing support unit that swingably supports the movable module about a side where the image sensor is positioned with respect to the lens; and the image sensor that supports the movable module with respect to the lens. A shake correction magnetic drive mechanism that generates a magnetic force that swings around the position where it is located ,
The swing support portion includes a support protrusion that protrudes from one side of the movable module and the fixed body toward the other side, and a contacted portion on which the tip end portion of the support protrusion abuts on the other side. Pivot part,
The hand movement detection sensor is electrically connected to a flexible wiring member for sensors separate from the flexible wiring member for the image sensor,
Each of the flexible wiring member for the sensor and the flexible wiring member for the image sensor includes a strip-shaped narrow portion,
The strip-shaped narrow width portions of the sensor flexible wiring member and the imaging element flexible wiring member are respectively formed in the gap formed between the movable module and the fixed body by the pivot portion. It is characterized by being passed so as to avoid the support protrusion .

  In the present invention, the flexible wiring member for the image sensor electrically connected to the image sensor is drawn out from the end of the movable module opposite to the subject side. Is pivoted about the side where the image sensor is located with respect to the lens (the end opposite to the subject side), so that the deformation of the flexible wiring member for the image sensor is extremely small. Therefore, the movable module can be swung quickly. In addition, since the elastic deformation of the flexible wiring member when the end of the movable module on the image sensor side is swung is extremely small, the shape restoring force of the flexible wiring member received by the movable module is also extremely small. Therefore, the movable module can be properly swung without being affected by the deformation of the flexible wiring member, so that camera shake correction can be reliably performed. In particular, in the present invention, a magnetic drive mechanism is used as an actuator for camera shake correction. In the case of such magnetic drive, there are great advantages in terms of simplification of the configuration and weight reduction, while the movable module is elastic and non-contact. However, in the present invention, the deformation of the flexible wiring member hardly affects the external force as an external force. Therefore, even if the movable module is oscillated by the magnetic drive, it can be driven properly. Therefore, camera shake correction with excellent responsiveness can be performed accurately.

In the present invention, each of the strip-like narrow portions of the sensor flexible wiring member and the imaging element flexible wiring member is formed between the movable module and the fixed body by the pivot portion. The support protrusion is passed through the gap. For example, it is preferable that the strip-shaped narrow portions of each of the sensor flexible wiring member and the imaging element flexible wiring member extend in parallel so as to sandwich the pivot portion therebetween. . If comprised in this way, the clearance gap which generate | occur | produced between the movable module and the fixed body by formation of a pivot part can be used effectively as a drawing space of the flexible wiring member for sensors and the flexible wiring member for image sensors. .

In the present invention, the swing support part is a contacted part in which a support protrusion protruding from one side of the movable module and the fixed body toward the other side and a tip part of the support protrusion contact on the other side. It is the pivot part provided with the part . According to such a structure, a movable module can be reliably supported by a simple structure so that rocking | fluctuation is possible.

  In the present invention, it is preferable that the shake correction magnetic drive mechanism is controlled in a closed loop so that an integral value of a detection result of the shake detection sensor becomes zero.

  In the present invention, it is preferable that the camera shake detection sensor is disposed on the subject side with respect to the pivot portion and at a position overlapping the pivot portion in the optical axis direction. If comprised in this way, since the displacement in any direction of the movable module by camera shake can be detected reliably, camera shake correction | amendment can be performed reliably.

In the present invention, the camera shake detection sensor is electrically connected to the sensor flexible wiring member separate from the image sensor flexible wiring member, and the sensor flexible wiring member and the imaging the flexible wiring member element, both a flexible substrate on which a wiring pattern is formed on a flexible insulating substrate, a band-like narrow part that is folded in the direction of the optical axis at at least one location It is preferable to provide. With this configuration, when the movable module swings during camera shake correction, the deformation of the sensor flexible wiring member and the imaging element flexible wiring member is caused by the sensor flexible wiring member and the imaging element. Absorbed at the bent portion of the flexible wiring member. Moreover, the bent portions are the band-like narrow part of the flexible wiring member and the flexible board imaging device, it is possible to bend with a small force, bent shape restoring force after small. Therefore, the deformation of the flexible wiring member for sensor and the flexible wiring member for imaging device hardly affects the swing of the movable module. Therefore, the movable module can be properly swung, so that hand shake correction can be reliably performed. In addition, when the folding structure is adopted, when the movable module swings, the following equation is given: Tensile strain h = ΔL / L
L: Original length
ΔL: The tensile strain h of the flexible substrate indicated by the change in length is reduced. Therefore, the following equation: Stress f = E · h
E: Since the stress f indicated by a constant is also reduced, the rocking hindrance caused by the flexible substrate is reduced.

  In the present invention, in the strip-shaped narrow portion of each of the sensor flexible wiring member and the imaging element flexible wiring member, the bent portion toward the camera shake detection sensor and the imaging element is around the support protrusion. It is preferable that the support protrusion is disposed at the center. If comprised in this way, the force which the flexible wiring member for sensors and the flexible wiring member for an image pick-up element exert on the movable module will be equal even if the movable module swings in any direction. Therefore, the movable module can be properly swung, so that camera shake correction can be performed reliably.

In the present invention, it is preferable that the flexible wiring member for a sensor and / or the flexible wiring member for an image pickup device includes a bent portion to which a bending back preventing member is bonded. With this configuration, even when the flexible wiring member for a sensor or the flexible wiring member for an image pickup device is bent, the bent shape of the flexible wiring member for the sensor or the flexible wiring member for the image pickup device can be reliably ensured. Can be maintained.

In the present invention, the fixed body includes a substantially rectangular base that constitutes a part of the pivot portion at a position opposite to the subject side with respect to the movable module, and the base is relative to a bottom plate portion of the base. Only two side portions facing each other are provided with side plate portions standing toward the subject side, and the portion corresponding to the other two side portions of the bottom plate portion includes the flexible wiring member for sensors and the It is preferable that a notch is formed at a position overlapping the bent portion of the flexible wiring member for the image sensor. With this configuration, the base plate can stand up from the bottom plate portion of the base, and the strength of the base can be ensured, and the sensor flexible wiring member and the imaging element flexible wiring member are provided with bent portions. However, since there is no problem such that the bent portion is caught on the base, the camera shake correction can be reliably performed.

  In the present invention, the support protrusion is formed on the bottom plate portion of the base, and the movable module includes a sensor support substrate at a position facing the base on the object side, and the object side of the sensor support substrate It is possible to adopt a configuration in which the camera shake detection sensor is disposed on the surface of the sensor, and the surface of the sensor support substrate opposite to the subject side is the contacted portion with which the tip of the support protrusion contacts. it can.

  In the present invention, it is preferable that the flexible wiring member for a sensor and the flexible wiring member for an image sensor are both single-sided flexible substrates in which the wiring pattern is formed on one surface of the insulating base material. . A single-sided flexible board is less expensive than a double-sided board, and the force required for deformation and the shape recovery force generated when it is deformed are small. Therefore, camera shake correction can be performed reliably.

  In the present invention, an urging means for urging the movable module toward the pivot portion is provided, and the urging means is coupled to the inner peripheral side coupling portion coupled to the movable module and the fixed body. Preferably, the gimbal spring includes an outer peripheral side connecting portion and a plurality of arm portions extending from the inner peripheral side connecting portion and connected to the outer peripheral side connecting portion. This configuration has the advantage that the space occupied by the biasing means can be reduced. The gimbal spring is connected to the movable module on the inner peripheral side connecting part, the outer peripheral side connecting part connected to the fixed body, and the inner peripheral side connecting part extending in the same circumferential direction from the outer peripheral side. When the gimbal spring is provided with a plurality of arm parts connected to the side connecting part, the gimbal spring exerts a substantially uniform biasing force in all directions, so that the posture of the movable module is stable and it is used for camera shake correction. Control of the magnetic drive mechanism is extremely easy. Moreover, since the arm part is extended in the same direction of the circumferential direction, an arm part can be extended long. Therefore, the urging means exhibits an urging force with high linearity over the entire movable range of the movable module, so that the camera shake can be reliably corrected without complicating the control for the camera shake correcting magnetic drive mechanism.

  In the present invention, the gimbal spring may be in a deformed state that generates a biasing force that biases the movable module toward the pivot portion even during a neutral period in which the camera shake correction magnetic drive mechanism stops driving. preferable. If comprised in this way, the state in which the movable module is supported by the pivot part can be maintained reliably.

  In the present invention, a biasing means for biasing the movable module toward the pivot portion is provided, and the biasing means biases the movable module toward the pivot portion by a magnetic action. And a spring member that mechanically biases the movable module toward the pivot portion, and the spring member is coupled to the inner peripheral side coupling portion coupled to the movable module and the fixed body. Preferably, the gimbal spring includes an outer peripheral side connecting portion and a plurality of arm portions extending from the inner peripheral side connecting portion and connected to the outer peripheral side connecting portion. If comprised in this way, the state in which the movable module is supported by the pivot part can be maintained reliably. Further, during the neutral period in which the camera shake correction magnetic drive mechanism stops driving, the movable module is biased toward the pivot portion only by the magnetic spring, and the gimbal spring is not deformed so as not to generate a biasing force. It can be. In such a configuration, when the movable module swings, the gimbal spring is deformed. That is, the gimbal spring remains flat during the period when the movable module is not swinging. For this reason, since the part in which the force applied to the gimbal spring and the amount of deformation of the gimbal spring have linearity can be used effectively, the movable module can be properly swung, and camera shake correction can be performed reliably. it can.

  In the present invention, it is preferable that a vibration absorbing material is fixed to at least a part of the arm portion. If comprised in this way, when a movable module is rock | fluctuated, the vibration of an arm part can be stopped rapidly, Therefore The vibration of a movable module can also be stopped quickly.

  In the present invention, regardless of whether or not the swing support portion is a pivot portion, the camera shake detection sensor is mounted on the movable module at a position opposite to the subject side with respect to the imaging device, and the camera shake is detected. The detection sensor is electrically connected to a flexible wiring member for the sensor separate from the flexible wiring member for the imaging element, or a flexible wiring member integral with the flexible wiring member for the imaging element. The configuration can be adopted. In this case, it is preferable that the shake correction magnetic drive mechanism is controlled in a closed loop so that an integral value of a detection result of the shake detection sensor becomes zero.

  In the present invention, the shake correction magnetic drive mechanism generates a magnetic force that causes the movable module to swing in the same direction in pairs at two opposing positions with the swing center of the movable module in between. It is preferable. With this configuration, the driving capability is stable unlike the case where the camera shake correction magnetic drive mechanism is arranged only on one side with respect to the swing center of the movable module. In other words, when the distance from the swing center of the movable module of the movable module of the shake correction magnetic drive mechanism is shifted to the side where the drive force is weakened, the other drive shake correction magnetic drive mechanism is shifted to the direction of increase of the drive force. . Therefore, according to the present invention, camera shake can be accurately corrected.

  In the present invention, when three directions orthogonal to each other are defined as an X-axis, a Y-axis, and a Z-axis, respectively, and a direction parallel to the optical axis is defined as a Z-axis, As the camera shake correction magnetic drive mechanism, it is preferable that two sets of camera shake correction magnetic drive mechanisms that generate a magnetic drive force that swings around two of the X, Y, and Z axes are configured. . If comprised in this way, since a movable module can be rock | fluctuated around two axis lines, if they were synthesize | combined, the movable module was rock | fluctuated within the surface prescribed | regulated by said two axis lines. . Therefore, it is possible to reliably correct the camera shake assumed in a camera-equipped mobile phone or the like.

  For example, the two sets of the shake correction magnetic drive mechanisms swing the movable module around the X axis in pairs at two positions facing each other with the swing center of the movable module in between in the Y-axis direction. The movable module is swung around the Y axis in pairs at two positions facing the first camera shake correcting magnetic drive mechanism for generating a magnetic driving force and sandwiching the swing center of the movable module in the X-axis direction. A second camera shake correction magnetic drive mechanism that generates a magnetic drive force to be moved, and the first camera shake correction magnetic drive mechanism is disposed at each of two locations located in the Y-axis direction on the movable module. A first camera shake correction magnet, and a first camera shake correction coil facing each of the two first camera shake correction magnets in the Y-axis direction, and the second camera shake correction magnet. The moving mechanism is opposed to each of the second camera shake correction magnets disposed at each of the two locations on the movable module in the X axis direction and each of the two camera shake correction magnets at the two locations in the X axis direction. It is preferable to include a second hand shake correction coil. If comprised in this way, since the magnet was provided in the movable module and the coil was provided in the fixed body, since the number of wiring with respect to a movable module may be small, a wiring structure can be simplified. Further, if the first camera shake correction coil and the second camera shake correction coil are arranged on the fixed body side, the number of turns of the coil can be increased, so that a large driving force can be exhibited. Furthermore, since the smaller magnet of the coil and the magnet is provided on the movable module, the weight of the movable module can be reduced. Therefore, since the movable module can be swung with a small force, power consumption required for camera shake correction can be reduced. There is also an advantage of excellent response to hand shake.

  In the present invention, the first camera shake correction coil has a side portion extending in the X-axis direction at a position shifted in the Z-axis direction from a position facing the first camera shake correction magnet in the Y-axis direction. Is the effective side, and the second camera shake correction coil extends in the Y-axis direction at a position shifted in the Z-axis direction from a position facing the second camera shake correction magnet in the X-axis direction. A configuration in which the side portion is an effective side can be employed.

  In this case, the first camera shake correction magnet and the second camera shake correction magnet are magnetized to different poles on the outer surface side, and the first camera shake correction coil is a side portion extending in the X-axis direction. In addition to the side portion extending in the Z-axis direction, the side portion extending in the Z-axis direction is also an effective side, and the second camera shake correction coil is provided in the Z-axis direction in addition to the side portion extending in the Y-axis direction. It is preferable that the extending side portion is also an effective side. With this configuration, the magnetic fields generated by the first camera shake correction magnet and the second camera shake correction magnet can be efficiently linked to the first camera shake correction coil and the second camera shake correction coil. Accordingly, since a large torque can be obtained with a small power consumption, the movable module can be swung quickly and reliably. Therefore, it is possible to reduce power consumption of a portable device equipped with an imaging optical device, and to perform camera shake correction quickly and reliably.

  In the present invention, the first camera shake correction magnet and the second camera shake correction magnet are magnetized with different outer surfaces in the Z-axis direction, and the first camera shake correction coil is the first camera shake correction coil. A side portion extending in the X-axis direction so as to face each portion magnetized on different poles of the hand-shake correction magnet in the Y-axis direction is an effective side, and the second hand-shake correction coil The side portion extending in the Y-axis direction so as to oppose each portion magnetized to different poles of the second camera shake correction magnet in the X-axis direction is an effective side. Is preferred. With this configuration, the magnetic fields generated by the first camera shake correction magnet and the second camera shake correction magnet can be efficiently linked to the first camera shake correction coil and the second camera shake correction coil. The magnetic driving force acting on the movable module is a force in a direction that causes the movable module to swing in the optical axis direction. Therefore, even when the swing center (position of the pivot portion) of the movable module and the location where the force acts on the movable module are close to each other in the optical axis direction, the magnetic driving force is effective for the force that the movable module swings. Can be used. Therefore, since a large torque can be obtained with a small power consumption, the movable module can be swung quickly and reliably. Therefore, it is possible to reduce power consumption of a portable device equipped with an imaging optical device, and to perform camera shake correction quickly and reliably.

  In the present invention, it is preferable that the first camera shake correction coil and the second camera shake correction coil are held on each surface of a rectangular tube-shaped coil holder disposed outside the movable module. With this configuration, it is possible to realize a configuration in which the first camera shake correction coil and the second camera shake correction coil are held in the coil holder having a high strength. Therefore, the first camera shake correction coil and the second camera shake correction coil can be realized. High accuracy can be obtained in the positional relationship between the coil and the first camera shake correction magnet and the second camera shake correction magnet. Therefore, since a large torque can be obtained with a small power consumption, the movable module can be swung quickly and reliably. Therefore, it is possible to reduce power consumption of a portable device equipped with an imaging optical device, and to perform camera shake correction quickly and reliably.

  In the present invention, when the movable module vibrates between the fixed body and the movable module, a collision between the movable module and the camera shake correction coil, and between the camera shake correction magnet and the fixed body, It is preferable that a contact portion is disposed each time the movable module and the fixed body are brought into contact with each other before a collision occurs. With this configuration, even if the camera shake correction coil and the camera shake correction magnet are brought close to each other, the camera shake correction coil and the camera shake correction magnet can be prevented from being damaged.

  In the present invention, it is preferable that an attachment module having a shutter mechanism is fixed to the fixed body on the subject side with respect to the movable module. If comprised in this way, compared with the case where an attachment module is mounted in a movable module, the weight reduction of a movable module can be achieved. Accordingly, the movable module can be swung quickly and reliably, and the power consumption of a portable device equipped with the imaging optical device can be reduced.

In the present invention, the flexible wiring member for the image sensor electrically connected to the image sensor is drawn out from the end of the movable module opposite to the subject side. Since the lens is swung around the side where the image sensor is located (the end opposite to the subject), the deformation of the flexible wiring member for the image sensor is extremely small. Therefore, the movable module can be swung quickly. In addition, since the elastic deformation of the flexible wiring member when the end of the movable module on the image sensor side is swung is extremely small, the shape restoring force of the flexible wiring member received by the movable module is also extremely small. Therefore, the movable module can be properly swung without being affected by the deformation of the flexible wiring member, so that camera shake correction can be reliably performed. In particular, in the present invention, a magnetic drive mechanism is used as an actuator for camera shake correction. In the case of such magnetic drive, there are great advantages in terms of simplification of the configuration and weight reduction, while the movable module is elastic and non-contact. However, in the present invention, the deformation of the flexible wiring member hardly affects the external force as an external force. Therefore, even if the movable module is oscillated by the magnetic drive, it can be driven properly. Therefore, camera shake correction with excellent responsiveness can be performed accurately. Furthermore, according to the present invention, the gap generated between the movable module and the fixed body due to the formation of the pivot portion can be effectively used as a routing space for the sensor flexible wiring member and the imaging element flexible wiring member. Can do.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the following description, the three directions orthogonal to each other will be described as the X axis, the Y axis, and the Z axis, respectively, and the direction parallel to the optical axis L (lens optical axis) will be described as the Z axis. Accordingly, in the following description, of the hand movements in each direction, rotation around the X axis corresponds to so-called pitching (pitch), rotation around the Y axis corresponds to so-called yawing (roll), and Z axis The rotation around corresponds to so-called rolling.

(Overall configuration of optical device for photographing)
1A and 1B are external views of a photographing optical device to which the present invention is applied as viewed obliquely from the upper side on the subject side, and when the photographing optical device is cut along a line parallel to the optical axis. It is explanatory drawing of. FIG. 2 is an exploded perspective view of a photographing optical apparatus to which the present invention is applied.

  An imaging optical device 200 shown in FIGS. 1A, 1B, and 2 is a thin camera used for a mobile phone with a camera, and has a substantially rectangular parallelepiped shape as a whole. In this embodiment, the imaging optical device 200 includes a rectangular plate-shaped base 220 and a box-shaped fixed cover 230 that covers the base 220. The fixed body 210 is formed by the base 220 and the fixed cover 230. Is configured.

  As will be described later, in the present embodiment, a movable module 1 having a built-in focus mechanism for a lens and a camera shake correction mechanism for performing camera shake correction by swinging the movable module 1 are configured inside the fixed cover 230. Has been.

  Further, in the fixed body 210, at the subject side end of the fixed cover 230, a shutter mechanism, a filter driving mechanism for switching various filters to appear on the optical axis and retracted from the optical axis, and a diaphragm mechanism Attached module 270 with a built-in is fixed. Further, the accessory module flexible substrate 275 pulled out from the accessory module 270 is drawn along the side surface of the accessory module 270 to the side opposite to the object side, and then to a control circuit (not shown) of the apparatus main body. It extends towards. As the shutter mechanism, a mechanism type that magnetically drives the shutter plate or a mechanism using a liquid crystal device can be used.

(Configuration of movable module 1 and photographing unit 1a)
3A and 3B are an external view and an exploded perspective view, respectively, of the photographing unit of the movable module 1 used in the photographing optical device 200 to which the present invention is applied as viewed obliquely from above. FIG. 4 is an explanatory diagram schematically showing the operation of the photographing unit of the movable module 1 shown in FIG. The left half of FIG. 4 shows a view when the moving body 3 is at a position at infinity (normal shooting position), and the right half of FIG. 4 shows the moving body 3 at the macro position (close-up shooting position). The figure when it exists in is shown.

  As shown in FIGS. 1A, 1B, and 2, the movable module 1 has a photographing unit 1a that incorporates a focusing mechanism for the lens, and this photographing unit 1a constitutes a camera shake prevention mechanism. For this purpose, each cylindrical yoke 16 that houses the photographing unit 1a and a sensor support substrate 115 are attached.

  The configuration of the photographing unit 1a provided in the movable module 1 will be described with reference to FIGS. 3 (a), 3 (b), and FIG.

  3A, 3 </ b> B, and 4, the photographing unit 1 a has a lens in the A direction (front side) approaching the subject (object side) along the direction of the optical axis L, and the side opposite to the subject (imaging). This is for moving in both directions in the B direction (rear side) approaching the element side / image side, and has a substantially rectangular parallelepiped shape. The photographing unit 1a generally includes a moving body 3 that holds three lenses 121 and a fixed diaphragm inside, a lens driving mechanism 5 that moves the moving body 3 along the optical axis direction, a lens driving mechanism 5 and a movement. And a support body 2 on which a body 3 and the like are mounted. The moving body 3 includes a cylindrical lens holder 12 that holds a lens 121 and a fixed diaphragm, and a lens driving coil holder 13 that holds lens driving coils 30s and 30t, which will be described later, on an outer peripheral side surface.

  The support 2 includes a rectangular plate-shaped image sensor holder 19 that positions the image sensor 15 on the side opposite to the object side, a box-shaped case 18 that covers the image sensor element 19 on the object side, and an inner side of the case 18. In the center of the case 18 and the spacer 11, circular incident windows 110 and 180 for taking light from the subject into the lens 121 are formed. A hole 190 that guides incident light to the image sensor 15 is formed in the center of the image sensor holder 19.

  Further, in the photographing unit 1 a, the support 2 includes a substrate 154 on which the image sensor 15 is mounted on the upper surface, and the substrate 154 is fixed to the lower surface of the image sensor holder 19. Here, the substrate 154 is a double-sided substrate, and an imaging element flexible substrate 155 (see FIG. 1 and the like) that is electrically connected to the imaging element 15 is connected to the lower surface side of the substrate 154.

  In this embodiment, the case 18 is made of a ferromagnetic plate such as a steel plate and also functions as a yoke. For this reason, the case 18 constitutes an interlinkage magnetic field generator 4 that generates an interlinkage magnetic field in the lens drive coils 30 s and 30 t held by the lens drive coil holder 13 together with a lens drive magnet 17 described later. The cage. The interlinkage magnetic field generator 4 constitutes the lens driving mechanism 5 together with the lens driving coils 30 s and 30 t wound around the outer peripheral surface of the lens driving coil holder 13.

  The support 2 and the moving body 3 are connected via metal spring members 14s and 14t. The spring members 14s and 14t have the same basic configuration, and an outer peripheral side connecting portion 14a held on the support body 2 side, an annular inner peripheral side connecting portion 14b held on the moving body 3 side, An arm-shaped leaf spring portion 14c that connects the outer peripheral side connecting portion 14a and the inner peripheral side connecting portion 14b is provided. Among the spring members 14 s and 14 t, the imaging element side spring member 14 s holds the outer peripheral side connecting portion 14 a on the imaging element holder 19, and the inner peripheral side connecting portion 14 b images the lens driving coil holder 13 of the moving body 3. It is connected to the element side end face. In the subject-side spring member 14 t, the outer peripheral side connecting portion 14 a is held by the spacer 11, and the inner peripheral side connecting portion 14 b is connected to the subject side end face of the lens driving coil holder 13 of the moving body 3. In this way, the moving body 3 is supported by the support body 2 so as to be movable in the direction of the optical axis L via the spring members 14s and 14t. The spring members 14s and 14t are both made of nonmagnetic metal such as beryllium copper or nonmagnetic SUS steel, and are formed by pressing a thin plate having a predetermined thickness or etching using a photolithography technique. It is. Of the spring members 14s and 14t, the spring member 14s is divided into two spring pieces 14e and 14f, and the ends of the lens driving coils 30s and 30t are connected to the spring pieces 14e and 14f, respectively. Further, in the spring member 14s, terminals 14d are formed on the spring pieces 14e and 14f, respectively, and the spring members 14s (spring pieces 14e and 14f) also function as power supply members for the lens driving coils 30s and 30t.

  In this embodiment, a ring-shaped magnetic piece 61 is held on the subject-side end face of the lens driving coil holder 13, and the position of the magnetic piece 61 is a position from the subject side with respect to the lens driving magnet 17. is there. The magnetic piece 61 applies an urging force in the direction of the optical axis L to the moving body 3 by an attractive force acting between the magnetic piece 61 and the lens driving magnet 17. For this reason, since it is possible to prevent the moving body 3 from being displaced by its own weight when no current is applied, it is possible to keep the moving body 3 in a desired posture and to further improve the impact resistance. Further, the magnetic piece 61 acts as a kind of yoke, and can reduce leakage magnetic flux from a magnetic path formed between the lens driving magnet 17 and the lens driving coils 30s and 30t. In addition, as the magnetic piece 61, a rod-shaped or spherical magnetic body may be used. Here, if the magnetic piece 61 is formed in a ring shape, there is an effect that the magnetic attractive force attracted to the lens driving magnet 17 when the lens holder 12 moves in the optical axis direction is isotropic.

  The magnetic piece 61 is disposed on the subject-side end surface of the lens holder 12. When the magnetic piece 61 is not energized (origin position), the magnetic piece 61 is attracted to the lens driving magnet 17 to bring the lens holder 12 to the imaging element side. Can stand still. In addition, when energized, the magnetic piece 61 held on the end surface on the subject side of the lens holder 12 moves to a position farther away from the lens driving magnet 17, thereby extraneously pressing the lens holder 12 against the imaging element side. Since no force is applied, the lens holder 12 can be moved in the optical axis direction with a small amount of electric power.

  In the photographing unit 1a of the present embodiment, when viewed from the direction of the optical axis L, the lens 121 is circular, but the case 18 used for the support body 2 has a rectangular box shape. Accordingly, the case 18 includes a rectangular tube-shaped body portion 184, and an upper plate portion 185 in which an incident window 180 is formed on the upper surface side of the rectangular tube-shaped body portion 184. In this embodiment, the rectangular tube body 184 has a rectangular tube shape, and includes four side plate portions 181 at each position corresponding to a square side when viewed from the direction of the optical axis L.

  A lens driving magnet 17 is fixed to the inner surface of each of the four side plate portions 181. Each of the lens driving magnets 17 is formed of a rectangular flat permanent magnet. Each of the four lens driving magnets 17 is magnetically divided into two in the direction of the optical axis L, and in any case, the inner surface and the outer surface are magnetized to different poles. For example, in the four lens driving magnets 17, for example, the inner surface is magnetized to the N pole in the upper half, the outer surface is magnetized to the S pole, and the inner surface is magnetized to the S pole in the lower half. The pole is magnetized. For this reason, in the four lens driving magnets 17, the arrangement of the magnetic poles is the same between the adjacent permanent magnets, and the flux linkage lines for the coil can be generated efficiently.

  The movable body 3 includes a cylindrical lens holder 12 that holds the lens 121 and the like, and a lens driving coil holder 13 in which coils (lens driving coils 30s and 30t) are wound around the outer peripheral side surface. The holder 12 and the lens driving coil holder 13 constitute a side wall portion of the moving body 3. In the lens holder 12, the upper half is a large-diameter cylindrical portion 12b having a large diameter, and the lower half is a small-diameter cylindrical portion 12a having a smaller diameter than the large-diameter cylindrical portion 12b. The lens driving coil holder 13 includes a circular lens holder housing hole 130 for holding the lens holder 12 inside.

  In this embodiment, when the lens driving coil holder 13 is viewed from the direction of the optical axis L, the inner peripheral shape is circular. However, the outer peripheral side surface 131 that defines the outer peripheral shape of the lens driving coil holder 13 is a quadrangle. The four surfaces 132 are provided at positions corresponding to the four sides. On the outer peripheral side surface 131 of the lens driving coil holder 13, rib-shaped protrusions 131 a, 131 b, 131 c are formed at both ends and the center position in the direction of the optical axis L over the entire periphery, and the image sensor side end portion A recess sandwiched between the rib-shaped protrusion 131a formed at the center and the rib-shaped protrusion 131b formed at the center is a first coil winding section 132a, and the rib-shaped protrusion 131c formed at the subject side end. And a recess sandwiched between the rib-shaped protrusion 131b formed at the center position is a second coil winding portion 132b.

  In the lens driving coil holder 13, each of the four surfaces 132 is removed so as to avoid a square corner portion with respect to each of the first coil winding portion 132 a and the second coil winding portion 132 b. A rectangular through hole (through holes 133a, 133b) is formed, and the through holes 133a, 133b penetrate the side wall of the lens driving coil holder 13 in the inner and outer directions. In this manner, in the present embodiment, the through holes 133a and 133b of the lens driving coil holder 13 form a hollow portion that is recessed inward on the outer peripheral side surface 131 of the movable body 3. In the circumferential direction, the through-holes 133a and 133b have a circumferential length dimension (a square side of each side 132) at a central portion sandwiched between adjacent corner portions on the outer peripheral side surface 131 of the lens driving coil holder 13. The dimension is about 1/3 of the dimension). For this reason, a thick column portion 134 extending in the direction of the optical axis L is formed in the corner portion of the lens driving coil holder 13 with an equal thickness. The through holes 133a and 133b are formed over the entire width direction (direction of the optical axis L) of the first coil winding portion 132a and the second coil winding portion 132b, but the rib-like protrusions 131a, 131b, and 131c are formed. It is not formed to take. Accordingly, the through holes 133a and 133b (thickening portions) are formed only in the middle portion in the direction of the optical axis L of the lens driving coil holder 13 (moving body 3), and are formed at positions avoiding both end portions. .

  In the lens driving coil holder 13 configured as described above, the lens driving coil 30s is wound around the first coil winding portion 132a, and the lens driving coil 30t is wound around the second coil winding portion 132b. It has been turned. Here, since the first coil winding portion 132a and the second coil winding portion 132b are quadrangular when viewed from the direction of the optical axis L, the lens driving coils 30s and 30t are both wound in a rectangular tube shape. ing. Each of the four lens driving magnets 17 is magnetically divided into two in the optical axis direction, and in each case, the inner surface and the outer surface are magnetized to different poles, so that two lens driving coils are used. The winding directions at 30 s and 30 t are opposite.

  Further, the through holes 133a and 133b have the same length in the direction of the optical axis L as the length of the first coil winding portion 132a and the second coil winding portion 132b in the direction of the optical axis L. In the direction of the axis L, the first coil winding portion 132a and the second coil winding portion 132b are formed over the whole, but the lens driving coils 30s and 30t are formed of the first coil winding portion 132a and the second coil. It is wound over the entire winding part 132b and passes through the entire formation region of the through holes 133a, 133b. For this reason, the through holes 133a and 133b are closed at the outside by the lens driving coils 30s and 30t. Further, since the lens holder 12 is mounted in the lens holder housing hole 130 of the lens driving coil holder 13, of the through holes 133a and 133b, the through hole 133b located on the subject side in the direction of the optical axis L is While the inner opening is closed by a large-diameter cylindrical portion 12b formed in the upper half of the lens holder 12, the through hole 133a located on the image sensor side in the optical axis direction is below the lens holder 12. The small-diameter cylindrical part 12a formed in the half part is facing.

  The thus configured lens driving coil holder 13 is arranged inside the case 18. As a result, the four side portions of the lens driving coils 30 s and 30 t face the lens driving magnet 17 fixed to the inner surface of the rectangular tube-shaped body portion 184 of the case 18.

  As described above, in this embodiment, by providing the lens driving coil holder 13 with the through holes 133a and 133b (thickening portions), the weight of the moving body 3 is reduced and the thrust of the moving body 3 is increased. Further, since the through holes 133a and 133b are formed on the surface 132 that avoids the corner portion of the outer peripheral side surface 131 of the lens driving coil holder 13, the corner portion of the lens driving coil holder 13 has the optical axis L. A thick portion extending in the direction is formed as a post portion 134. For this reason, even when the weight of the moving body 3 is reduced by forming the through holes 133a and 133b, the moving body 3 has sufficient strength. If the through holes 133a and 133b are formed in the corners of the lens driving coil holder 13, when the lens driving coils 30s and 30t are wound, the shapes of the lens driving coils 30s and 30t are broken at the corners. Although the driving coils 30s and 30t cannot be wound in a square shape, in this embodiment, since the through holes 133a and 133b are formed in the surface 132 avoiding the corners, the driving coils 30s and 30t are used for driving the lens so as to pass through the through holes 133a and 133b. Even when the coils 30s and 30t are wound, the lens driving coils 30s and 30t can be wound in a square shape.

  Further, since the through holes 133a and 133b are formed in the central portion of the polygonal side, the thick pillar portions 134 extending in the direction of the optical axis L are equivalent to each of the plurality of corner portions of the polygon. Therefore, the weight balance and strength balance in the circumferential direction of the movable body can be suitably ensured. In addition, since the through holes 133a and 133b are formed in the middle of the lens driving coil holder 13 in the middle of the optical axis L in the direction of the optical axis L, the strength of both ends of the lens driving coil holder 13 is reduced. Can be prevented. Therefore, when the lens driving coils 30s and 30t are wound around the lens driving coil holder 13, a sufficient load can be applied to the wire, so that the lens driving coils 30s and 30t are closely aligned. Sufficient thrust can be obtained as much as it can be wound around.

(Operation of lens drive mechanism)
In the imaging unit 1a of the present embodiment, the moving body 3 is normally located on the imaging element side (imaging element side). In such a state, when a current in a predetermined direction is passed through the lens driving coils 30s and 30t. The lens driving coils 30 s and 30 t receive an upward (front) electromagnetic force. Accordingly, the moving body 3 to which the lens driving coils 30s and 30t are fixed starts to move toward the subject side (front side). At this time, an elastic force that restricts the movement of the moving body 3 is generated between the spring member 14 t and the front end of the moving body 3 and between the spring member 14 s and the rear end of the moving body 3. For this reason, when the electromagnetic force which moves the moving body 3 to the front side and the elastic force which regulates the movement of the moving body 3 balance, the moving body 3 stops. At this time, the moving body 3 can be stopped at a desired position by adjusting the amount of current flowing through the lens driving coils 30 s and 30 t according to the elastic force acting on the moving body 3 by the spring members 14 s and 14 t. .

  Thus, in this embodiment, since the spring members 14s and 14t in which a linear relationship is established between the elastic force (stress) and the displacement amount (distortion amount) are used, the movement amount of the moving body 3 and the lens driving lens are used. Linearity between the currents flowing through the coils 30s and 30t can be improved. In addition, since the two spring members 14s and 14t are used, a large balance force is applied in the direction of the optical axis L when the moving body 3 stops, and centrifugal force and impact are applied in the direction of the optical axis L. Even if another force such as a force is applied, the moving body 3 can be stopped more stably. Further, in the photographing unit 1a, the moving body 3 is not stopped by colliding with a collision material (buffer material) or the like, but is stopped using a balance between electromagnetic force and elastic force. Therefore, it is possible to prevent the occurrence of a collision sound.

  Further, the case 18 has a box shape having an upper plate portion 185 on the upper surface of the rectangular tube-shaped body portion 184, and thus is configured between the lens driving magnet 17 and the lens driving coils 30s and 30t. The leakage magnetic flux from the magnetic path can be reduced. Therefore, it is possible to improve the thrust between the movement amount of the lens driving coil holder 13 and the current flowing through the lens driving coils 30s and 30t. In addition, when the photographing unit 1a is assembled to a mobile phone, leakage magnetic flux to surrounding electronic components can be reduced.

  In the photographing unit 1a, the lens 121 is circular, but the lens driving coils 30s and 30t are rectangular regardless of the shape of the lens, and the lens driving magnet 17 has a rectangular inner peripheral surface in the support 2. It is a flat permanent magnet fixed to each of a plurality of inner surfaces corresponding to the sides of the rectangular tube-shaped body 184 of the case 18 formed in the above. For this reason, even when there is not enough space on the outer peripheral side of the moving body 3 between the moving body 3 and the support body 2, the facing area between the lens driving coils 30s and 30t and the lens driving magnet 17 is large. , Can exert a sufficient thrust. Further, when the moving body 3 is viewed from the direction of the optical axis L, the outer peripheral side surface (the outer peripheral side surface 131 of the lens driving coil holder 13) is the same square as the lens driving coils 30s and 30t. The lens driving coils 30s and 30t can be wound in a square shape simply by winding the lens driving coils 30s and 30t around the outer peripheral surface of the movable body 3 (the outer peripheral side surface 131 of the lens driving coil holder 13). Moreover, since the moving body 3 is divided into the lens holder 12 and the lens driving coil holder 13, the lens driving coils 30s and 30t are wound around the lens driving coil holder 13, and then the lens holder 12 is inserted into the lens holder housing hole. The structure accommodated in 130 can be adopted, and when the lens driving coils 30s and 30t are wound, a situation such as damage to the lens 121 can be avoided.

  Further, the moving body 3 of the photographing unit 1a holds a magnetic piece 61 that generates a magnetic attractive force between the lens driving magnet 17 and the lens driving magnet 17 at a position closer to the subject in the optical axis direction than the lens driving magnet 17. The position of the moving body 3 in the optical axis direction can be controlled with high accuracy. Therefore, in the photographing unit 1a, it is not necessary to perform control for monitoring and feeding back the position of the lens 121 in the optical axis direction with a sensor or the like. In either case where the magnetic piece 61 is provided on the movable body 3 or when the magnetic piece 61 is not provided on the movable body 3, the position of the lens 121 in the optical axis direction is monitored and fed back by a sensor or the like. You may do it.

  In the above embodiment, when viewed from the direction of the optical axis L, the rectangular tubular body 184 and the lens driving coils 30s and 30t are square, but may be substantially square. That is, the rectangular cylindrical body 184 and the lens driving coils 30s and 30t may have a shape in which square corners are rounded, and further, the square corners are linearly shaved to form, for example, an octagon. However, a configuration in which a portion cut at a corner portion is short and has a shape similar to a quadrangle may be used. Further, in the above-described embodiment, the rectangular tubular body 184 and the lens driving coils 30s and 30t are rectangular, but the shape of the rectangular tubular body and the coil is not limited to a square as long as it is a polygon. The lens driving magnet 17 may be a hexagonal shape, an octagonal shape, or the like. In addition, the lens driving magnet 17 is fixed to all surfaces of the rectangular cylindrical body portion of the yoke, and every other position in the circumferential direction. You may employ | adopt the structure currently fixed to the surface to perform. Further, in the above embodiment, the outer peripheral shape of the lens driving coil holder 13 is also polygonal. However, the lens driving coil holder 13 is cylindrical, and a plurality of protrusions and the like formed on the outer peripheral side surface thereof are used. A structure in which the lens driving coils 30 s and 30 t wound in a square shape are fixed to the outer peripheral side surface of the lens driving coil holder 13 may be adopted.

  In the above embodiment, the movable body 3 is divided into the lens holder 12 and the lens driving coil holder 13, and a concave portion or a hole formed by removing a part of the side wall portion of the movable body 3 from the body portion of the lens holder 12. The through-holes 133a and 133b constituting the thinned portion made of are formed. However, a concave portion or a hole formed by removing a part of the body portion of the lens holder 12 is formed, and the concave portion or the hole is thinned. It may be used as a part.

  In the above embodiment, the moving body 3 is divided into the lens holder 12 and the lens driving coil holder 13. However, the moving body may be configured as one component. On the other hand, if the concave part or the hole formed by removing a part thereof is formed as the thinned part, the weight of the movable body 3 can be reduced. Also in this case, it is preferable to adopt a configuration such as avoiding the corners when the through holes 133a and 133b are formed in the lens holder 12 in the above-described form.

  For the imaging unit 1a configured as described above, it is necessary to electrically connect the imaging device 15 and the lens driving coils 30s and 30t to the control unit of the apparatus main body. Therefore, in the present embodiment, the imaging element flexible substrate 155 is disposed on the opposite side of the subject side with respect to the photographing unit 1a, and the imaging element 15 and the lens driving coil 30s are arranged on the wiring pattern formed on the imaging element flexible substrate 155. , 30t are electrically connected.

(Configuration of image stabilization mechanism)
5 (a) and 5 (b) are respectively a longitudinal sectional view when the optical device for photography to which the present invention is applied is cut at a position corresponding to the line A1-A1 ′ of FIG. 1 (a), and FIG. It is a longitudinal cross-sectional view when it cut | disconnects in the position corresponded to the A2-A2 'line of (a).

  Referring again to FIGS. 1A, 1B, 2, 5A, and 5B, in configuring the camera shake correction mechanism in the imaging optical device 200 of this embodiment, first, the sensor support substrate 115 is used. Between the camera unit 1a and the photographing unit 1a. Here, the camera shake detection sensor 170 is a surface mount type gyro sensor (angular velocity sensor), and is mounted downward on the sensor flexible substrate 175. The upper surface of the camera shake detection sensor 170 is supported on the upper surface of the sensor support substrate 115. Such a gyro sensor is a sensor that detects angular velocity of two axes, preferably two axes orthogonal to each other. In this embodiment, the gyro sensor is configured to detect a biaxial angular velocity composed of an X axis and a Y axis. Here, the sensor support substrate 115 is formed with side plate portions 115b and 115c obliquely upward from the outer peripheral portion of the bottom plate portion, but the side plate portion 115c located in the Y-axis direction is a side plate portion located in the X-axis direction. Slightly lower than 115b. For this reason, the side plate portion 115b of the sensor support substrate 115 is fixed between the side plate portion 115c of the sensor support substrate 115 and the substrate 154 in a state where the side plate portion 115b of the imaging unit 1a is fixed to the bottom surface of the imaging unit 1a. A gap is formed through which the strip-shaped narrow portions 155b and 175b of the element flexible substrate 155 and the sensor flexible substrate 175 pass.

  A support projection 225 that protrudes in a hemispherical shape is formed at the center of the upper surface of the base 220 used for the fixed body 210, and the upper end of the support projection 225 abuts the center of the sensor support substrate 115 of the movable module 1. Thus, a pivot portion 205 (swing support portion) that supports the movable module 1 in a swingable manner is configured. Here, the support protrusion 225 is located on the optical axis L. For this reason, the movable module 1 can swing by the support protrusion 225 in any of the X-axis direction, the Y-axis direction, and the direction sandwiched between the X-axis direction and the Y-axis direction. Further, the support protrusion 225 (pivot portion 205) is disposed at a position overlapping the hand shake detection sensor 170 in the optical axis direction on the side opposite to the subject side with respect to the hand shake detection sensor 170.

  In this embodiment, a gimbal spring 280 having a rectangular planar shape is disposed between the fixed body 210 and the movable module 1 as a biasing unit that biases the movable module 1 toward the support protrusion 225. The gimbal spring 280 is made of metal such as phosphor bronze, beryllium copper, non-magnetic SUS steel, or the like, and is formed by pressing a thin plate having a predetermined thickness or etching using a photolithography technique.

  The gimbal spring 280 includes a rectangular frame-shaped inner peripheral side connecting portion 281 connected to the lower surface of the yoke 16 of the movable module 1 and a rectangular frame-shaped outer peripheral side connecting portion held at each corner of the base 220 in the fixed body 210. 285 and four arm portions 287 that extend from the inner peripheral side connecting portion 281 in the same circumferential direction and are connected to the outer peripheral side connecting portion 285, and the inner peripheral side connecting portion 281 and the outer peripheral side connecting portion are provided. The part 285 is configured so that the sides are parallel to each other. In this embodiment, each of the four arm portions 287 is connected to the inner peripheral side connecting portion 281 in the vicinity of one end of the sides of the inner peripheral side connecting portion 281, and the inner peripheral side connecting portion 281. It extends in parallel to the side part from the connecting portion with the side portion toward the other end portion of the inner peripheral side connecting portion 281 and is connected to the outer peripheral side connecting portion 285. In the gimbal spring 280 of this embodiment, since the inner peripheral side connecting portion 281 and the outer peripheral side connecting portion 285 have a square planar shape, the four arm portions 287 have the same shape and size as each other and are equiangular around the optical axis. The structure is arranged at intervals. For this reason, all of the four arm portions 287 are rotationally symmetric at 90 degrees, 180 degrees, and 270 degrees.

  In such a gimbal spring 280, since the upper end portion of the support protrusion 225 is in contact with the sensor support substrate 115 of the movable module 1, the inner peripheral side connection portion 286 has an outer peripheral side connection portion corresponding to the protrusion dimension of the support protrusion 225. It is located closer to the subject than 285. For this reason, the arm portion 287 is deformed so that the inner peripheral end is positioned closer to the subject side than the outer peripheral end. Therefore, the movable module 1 is biased toward the support protrusion 225 by the shape restoring force of the arm portion 287.

  Further, in this embodiment, as a camera shake correction magnetic drive mechanism for camera shake correction that generates a magnetic force that swings the movable module 1 with the support protrusion 225 as a fulcrum, between the movable module 1 and the fixed body 210, A first camera shake correction magnetic drive mechanism 250x that swings the movable module 1 around the X axis as indicated by an arrow X with the support protrusion 225 of the pivot portion 205 as a fulcrum, and the movable module 1 with the support protrusion 225 as a fulcrum. As shown by an arrow Y, a second camera shake correction magnetic drive mechanism 250y that swings around the Y-axis is configured, and the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y are configured. The configuration will be described below.

First, in the movable module 1, a square cylindrical body 164 of the yoke 16 is fixed to the outer peripheral surface of the support 2. In the yoke 16, an upper surface portion 166 that covers the subject side end portion of the photographing unit 1 a is formed at the subject side end portion of the body portion 164, and the upper surface portion 166 has a rectangular hole 160 for securing an optical path. Is formed. In addition, an end portion of the body portion 164 on the imaging element 15 side of the yoke 16 is bent slightly outward to enhance the magnetic flux collecting performance, and an inner peripheral side connecting portion 281 of the gimbal spring 280 is formed on the lower surface of the bent portion 167. It is fixed.

  In this embodiment, the rectangular cylindrical body 184 of the case 18 and the body 164 of the yoke 16 form a cover 150 that surrounds the movable body 3 on the outer peripheral side, and the four inner peripheral sides (case 18) of the cover 150 are formed. The lens driving magnet 17 is held on each of the inner peripheral side surfaces of the rectangular cylindrical body 184. Further, of the four outer peripheral side surfaces of the cover portion 150 (the outer peripheral side surface of the body portion 164 of the yoke 16), each of the two outer peripheral side surfaces facing each other in the Y-axis direction is provided with a first camera shake correction magnetic drive mechanism 250x. A rectangular plate-shaped camera shake correction magnet 240x (first camera shake correction magnet) is held, and each of the other two outer peripheral surfaces facing each other in the X-axis direction has a second camera shake correction magnetic drive mechanism 250y. The rectangular plate-shaped camera shake correction magnet 240y (second camera shake correction magnet) that constitutes the above is held. Accordingly, it is possible to prevent magnetic interference between the lens driving mechanism 5 and the camera shake correction magnetic drive mechanism (the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y). Here, each of the camera shake correction magnet 240x and the camera shake correction magnet 240y is formed of a rectangular flat permanent magnet.

  Next, on the outer peripheral side of the photographing unit 1a, a rectangular tube-shaped camera shake correction coil holder 260 is disposed so as to surround the photographing unit 1a. A bobbin portion 261 having a coil winding groove 263 opened around is formed outside each surface of the camera shake correction coil holder 260, and both sides in the optical axis direction of the camera shake correction coil holder 260 are framed. It is fixed to the inside of the base 220 while being sandwiched between the 192 and the accessory module 270. As the camera shake correction coil holder 260, a non-magnetic material is used, and in this embodiment, an integrally molded product of resin is used. Between the base 220 and the camera shake correction coil holder 260, a rectangular frame-shaped spacer 290 (a contact portion) is arranged, and the spacer 290 is made of an elastic member having an L-shaped cross section. By arranging such a spacer 290, when an external force is applied and the movable module 1 vibrates, the yoke 16 of the movable module 1 first hits the end of the spacer 290. For this reason, it is possible to prevent a collision between shake correction coils 230x and 230y, which will be described later, and the yoke 16, and a collision between the shake correction magnets 240x and 240y and the fixed body 210.

  Here, among the bobbin portions 261 of the shake correction coil holder 260, the shake correction coil 230x (first shake correction coil) is wound around the bobbin portion 261 formed at a position facing each other in the Y-axis direction. Has been. The camera shake correction coil 230x is positioned on the outer side with respect to the camera shake correction magnet 240x, and the camera shake correction magnet 240x forms a magnetic field interlinking with each side of the camera shake correction coil 230x.

  In this way, in this embodiment, the movable module 1 is paired around the X axis by the camera shake correcting coil 230x and the camera shake correcting magnet 240x that are paired at two positions facing each other with the support protrusion 225 interposed therebetween in the Y-axis direction. The first camera shake correction magnetic drive mechanism 250x is configured to swing. In the first camera shake correction magnetic drive mechanism 250x, the two camera shake correction coils 230x move the movable module 1 around the X axis when energized. Are connected so as to generate a magnetic driving force in the same direction. Accordingly, the two first camera shake correction magnetic drive mechanisms 250x apply push moments to the movable module 1 in the same direction around the X axis passing through the support protrusions 225 when the two camera shake correction coils 230x are energized. Has a pull configuration.

  In addition, among the bobbin portions 261 of the camera shake correction coil holder 260, a camera shake correction coil 230 y (second camera shake correction coil) is wound around the bobbin portions 261 formed at positions facing each other in the X-axis direction. The camera shake correction coil 230y faces the camera shake correction magnet 240y in the inner and outer directions. Therefore, the camera shake correction magnet 240y forms a magnetic field interlinking with each side of the camera shake correction coil 230y.

  In this way, in this embodiment, the movable module 1 is paired around the Y axis by the camera correction coil 230y and the camera shake correction magnet 240y in pairs at two locations facing each other with the support protrusion 225 interposed therebetween in the X-axis direction. The second camera shake correction magnetic drive mechanism 250y is configured to swing, and in the second camera shake correction magnetic drive mechanism 250y, the two camera shake correction coils 230y move the movable module 1 around the Y axis when energized. Are connected so as to generate a magnetic driving force in the same direction. Accordingly, the two second shake correction magnetic drive mechanisms 250y apply a moment in the same direction around the Y axis passing through the support protrusion 225 to the movable module 1 when the two shake correction coils 230y are energized. Has a pull configuration.

  Here, wiring holes 280a and 290a are formed at the corners of the gimbal spring 280 and the spacer 290, and the end portions 235x and 235y of the shake correction coils 230x and 230y are the wiring holes 280a and 290a of the gimbal spring 280 and the spacer 290, respectively. And is connected to the sensor flexible board 175 and extends toward a control circuit (not shown) of the apparatus main body. ing.

(Comparison of configuration of magnetic drive mechanism for image stabilization)
FIGS. 6A, 6B, and 6C illustrate a camera shake correction magnetic drive mechanism (a first camera shake correction magnetic drive mechanism 250x and a second camera shake correction magnetism) configured in an imaging optical device to which the present invention is applied. It is explanatory drawing which shows the structure of the drive mechanism 250y), explanatory drawing which shows the planar arrangement | positioning, and explanatory drawing which shows arrangement | positioning in an optical axis direction. FIGS. 7A, 7B, and 7C illustrate another camera shake correction magnetic drive mechanism (the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction) configured in the photographing optical apparatus to which the present invention is applied. FIG. 6 is an explanatory diagram showing the configuration of the magnetic drive mechanism 250y), an explanatory diagram showing its planar arrangement, and an explanatory diagram showing its arrangement in the optical axis direction. FIGS. 8A, 8B, and 8C show still another camera-shake correction magnetic drive mechanism (the first camera-shake correction magnetic drive mechanism 250x and the second camera-shake) configured in the photographing optical apparatus to which the present invention is applied. It is explanatory drawing which shows the structure of the magnetic drive mechanism for correction | amendment 250y), explanatory drawing which shows the planar arrangement | positioning, and explanatory drawing which shows arrangement | positioning in an optical axis direction. FIG. 9 is an explanatory diagram showing a comparison between the configuration shown in FIG. 7 and the configuration shown in FIG. 8 as the camera shake correction magnetic drive mechanism configured in the photographing optical apparatus to which the present invention is applied. 9 (a) shows the configuration shown in FIG. 8, and FIG. 9 (b) shows the configuration shown in FIG.

  In constructing the camera shake correction magnetic drive mechanism (the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y) in the photographing optical apparatus 200 of this embodiment, FIG. 6, FIG. 7, and FIG. The configuration shown in FIG.

  In the configurations shown in FIGS. 6A, 6B, 7C, 7A, 7B, and 7C, the camera shake correction coil 230x has a Y-axis relative to the camera shake correction magnet 240x. The side portion extending in the X-axis direction at a position shifted in the Z-axis direction from the position facing in the direction is the effective side 231x, and the camera shake correction coil 230y is in the X-axis direction with respect to the camera shake correction magnet 240y. The side portion extending in the Y-axis direction at a position shifted in the Z-axis direction from the position facing in FIG. Here, in the configuration shown in FIGS. 6A, 6 </ b> B, and 6 </ b> C, both of the camera shake correction magnets 240 x and 240 y are magnetized on the outer surface side to the same pole, for example, the N pole. On the other hand, in the configuration shown in FIGS. 7A, 7B, and 7C, the camera shake correction magnet 240x and the camera shake correction magnet 240y are magnetized to different poles on the outer surface side, for example, The camera shake correction magnet 240x is magnetized to the N pole on the outer surface side, whereas the camera shake correction magnet 240 is magnetized to the S pole on the outer surface side.

  When such a configuration is adopted, as can be understood by comparing the magnetic flux shown in FIG. 6A and the magnetic flux shown in FIG. 7A, according to the configuration shown in FIG. Magnetic flux is also effectively linked to the side portions 233x and 233y extending in the Z-axis direction of 230y. Therefore, when the same current is passed through the coil with the same number of coil turns, the configuration shown in FIGS. 7A, 7B, and 7C is preferably used. A larger torque can be obtained as compared with the case where the configurations shown in b) and (c) are adopted.

  In the configurations shown in FIGS. 8A, 8B, and 8C, in each of the camera shake correction magnets 240x and 240y, each outer surface is magnetized with a different pole in the Z-axis direction. For example, on the outer surface of the image stabilization magnets 240x and 240y, the portion located on the subject side is magnetized to the N pole, and the portion located on the opposite side (image sensor side) from the subject side is magnetized to the S pole. Yes. Further, the hand-shake correction coil 230x has a side portion extending in the X-axis direction so as to face each portion magnetized on different poles of the hand-shake correction magnet 240x in the Y-axis direction. The hand-shake correction coil 230y has side portions extending in the Y-axis direction so as to face each part magnetized in different poles of the hand-shake correction magnet 240y in the X-axis direction. The effective side is 231y.

  Comparing the configuration shown in FIG. 8 with the configuration shown in FIG. 7, even when the same current is passed through the coil with the same number of coil turns and the like, FIG. 8A, FIG. When the configuration shown in c) is adopted, a larger torque can be obtained as compared with the case where the configurations shown in FIGS. 7A, 7B, and 7C are adopted. The reason for this will be described with reference to FIGS. 9 (a) and 9 (b).

  First, FIGS. 9A and 9B correspond to FIGS. 8C and 7C, respectively. Comparing the configuration shown in FIGS. 8 and 9A with the configuration shown in FIGS. 7 and 9B, first, in the case of the configuration shown in FIGS. 8 and 9A, FIG. Compared with the configuration shown in FIG. 9B, there is an advantage that the leakage of magnetic flux is small.

Also, as shown in FIGS. 9A and 9B, the angle formed by the optical axis and the line connecting the pivot portion 205 and the position where the magnetic force acts on the movable module 1 is θ, and the pivot portion Assume that the distance between 205 and the position where the magnetic force acts on the movable module 1 is d, and an equivalent magnetic force indicated by F is generated. In this case, in the configuration shown in FIG. 8 and FIG. 9A, since the magnetic force acts in the optical axis direction, the moment M for swinging the movable module 1 around the pivot portion 205 is expressed by the following equation: (1)
M = d × F · sin θ (1)
It is represented by On the other hand, in the configuration shown in FIGS. 7 and 9B, since the magnetic force acts in the Y-axis direction, the moment M for swinging the movable module 1 around the pivot portion 205 is as follows. Equation (2)
M = d × F · cos θ (2)
It is represented by Therefore, when θ is 45 °, an equivalent moment M is generated in the configuration shown in FIGS. 8 and 9A and the configuration shown in FIGS. 7 and 9B. When the dimension in the Z-axis direction with respect to the position where the magnetic force acts on 1 is shortened to reduce the dimension in the optical axis direction of the imaging optical device 200, θ exceeds 45 °. In the case of such a configuration, when the expressions (1) and (2) are compared, the moment M obtained by the expression (1) is larger. Therefore, the configuration shown in FIGS. 8 (a), (b), and (c) is larger than the configuration shown in FIGS. 7 (a), (b), and (c). Torque can be obtained.

  9A and 9B illustrate the first camera shake correction magnetic drive mechanism 250x, the same applies to the second camera shake correction magnetic drive mechanism 250y.

(Configuration of flexible substrate for image sensor and sensor)
10A, 10B, and 10C are explanatory views of the periphery of the pivot portion 205 of the photographing optical device 200 to which the present invention is applied, and the overlapping portions of the flexible substrates for the image sensor and the sensor, respectively. It is explanatory drawing of the state which notched the figure and its upper part. 11A, 11B, and 11C are development views of the imaging element flexible substrate 155 used as the main substrate in the imaging optical device 200 to which the present invention is applied, respectively, and the imaging element flexible substrate 155 is folded. It is explanatory drawing of the state which accumulated, and explanatory drawing of the state which notched the upper part. 12 (a), 12 (b), and 12 (c) are developed views of the sensor flexible substrate 175 used as the sub substrate in the optical imaging apparatus 200 to which the present invention is applied, and the sensor flexible substrate 175 is folded. It is explanatory drawing of a state, and explanatory drawing of the state which notched the upper part. In FIGS. 11A and 12A, the valley fold line is indicated by a one-dot chain line, and the mountain fold line is indicated by a dotted line.

  As shown in FIGS. 1, 2, 5 (a) and 5 (b), in the photographing optical device 200 of the present embodiment, the attached module flexible substrate 275 pulled out from the attached module 270, the image sensor 15 and the lens drive. Three flexible substrates are used: the imaging device flexible substrate 155 to which the coils 30 s and 30 t are electrically connected, and the sensor flexible substrate 175 on which the camera shake detection sensor 170 is mounted. Such flexible boards are all flexible wiring members in which a wiring pattern is formed on an insulating base material, and when deformed, a shape restoring force is generated to return to the original shape.

  Therefore, in this embodiment, first, a single-sided flexible substrate in which a wiring pattern is formed on one surface of an insulating base material for any of the accessory module flexible substrate 275, the imaging element flexible substrate 155, and the sensor flexible substrate 175 is provided. It is used. Since such a single-sided flexible substrate has a thin base material and a wiring pattern is formed only on one side, it deforms with a small force and has a small shape restoring force when deformed. In addition, the flexible substrate is inexpensive.

  In this embodiment, the accessory module flexible substrate 275 is routed along the side surface of the fixed cover 230 to the opposite side to the subject side and bonded to the fixed cover 230.

  Further, as shown in FIGS. 1, 5A, 5B, and 10A, a part of the flexible substrate 155 for the image sensor and the flexible substrate 175 for the sensor are connected to the pivot portion. There are gaps between the base 220 on which the support protrusions 225 of 205 are formed and the sensor support substrate 115 and between the sensor support substrate 115 and the imaging unit 1a, but as described below, unnecessary shapes are used. No return force is generated and the pivot portion 205 is not covered.

  First, as shown in FIGS. 11A, 11 </ b> B, and 11 </ b> C, the imaging device flexible substrate 155 includes a rectangular connection portion 155 a that is electrically connected to the substrate 154, and a control portion. It has a lead-out portion 155c and a strip-like narrow width portion 155b that connects the connecting portion 155a and the lead-out portion 155c. ing. In this embodiment, when mounting the imaging element flexible substrate 155 in a state of being folded in the optical axis direction, bent portions 155f, 155g, and 155h are provided at a plurality of portions of the strip-shaped narrow width portion 155b.

  12A, 12B, and 12C, the sensor flexible substrate 175 includes a rectangular mounting portion 175a on which the camera shake detection sensor 170 is mounted, and a belt-like shape extending from the mounting portion 175a. A narrow portion 175b, and the leading end of the strip-shaped narrow portion 175b is a lead-out portion 175c. Here, the strip-shaped narrow portion 175b is formed to be considerably narrower than the mounting portion 175a. Further, in this embodiment, when the sensor flexible substrate 175 is mounted in a state of being folded in the optical axis direction, a bent portion 175f is provided in the strip-shaped narrow width portion 175b.

  The imaging device flexible substrate 155 and the sensor flexible substrate 175 configured as described above are connected to the connecting portion 155a in the imaging device flexible substrate 155 as shown in FIGS. 10 (a), 10 (b), and 10 (c). The sensor flexible substrate 175 is disposed between the sensor flexible substrate 175 and the portion 155c. The lead portion 175c of the sensor flexible substrate 175 is electrically connected to the lead portion 155c of the image sensor flexible substrate 155. The end portion of the accessory module flexible board 275 shown in FIG. 1 is also electrically connected to the lead-out portion 155c of the imaging element flexible board 155.

  Further, the base 220 is positioned between the connection portion 155a of the imaging element flexible substrate 155 and the strip-shaped narrow width portion 155b. As a result, on the upper surface of the base 220, the strip-shaped narrow portions 155b and 175b of the imaging device flexible substrate 155 and the sensor flexible substrate 175 are arranged in parallel so as to sandwich the support protrusion 225 (pivot portion 205) on both sides in the X-axis direction. Extends in the Y-axis direction. Therefore, the strip-shaped narrow portions 155 b and 175 c of the imaging device flexible substrate 155 and the sensor flexible substrate 175 are arranged between the sensor support substrate 115 of the movable module 1 and the fixed body 210 and the base 220 by the pivot portion 205. It is routed so as to avoid the support protrusion 225 within the configured gap.

Further, in the strip-shaped narrow portions 155 b and 175 b of the image sensor flexible substrate 155 and the sensor flexible substrate 175, the bent portions 155 f and 175 f toward the image sensor 15 and the camera shake detection sensor 170 are point-symmetric about the support protrusion 225. It is arranged at a position or a substantially point-symmetrical position.

Here, the base 220 includes a side plate portion 222 that stands up toward the subject side on two opposite side portions of the bottom plate portion 221, and corresponds to the other two side portions in the bottom plate portion 221. The side plate portion 222 is not formed in the portion, and notches 221a and 221b are formed at positions overlapping the folded portions 155f and 175f of the strip-shaped narrow portions 155b and 175b of the imaging device flexible substrate 155 and the sensor flexible substrate 175. Has been. Therefore, strip-shaped narrow portion 155b of the flexible substrate 155 and the flexible substrate 175 sensor imaging device, partially folded 175b 155f, be provided with a 175f, the bent portions 155f, 175f is a defect, such as catching on the base 220 does not occur .

(Image stabilization operation)
The camera-equipped mobile phone equipped with the photographing optical device 200 configured as described above is equipped with a camera shake detection sensor such as a gyro sensor for detecting camera shake during shooting, and the detection result of the camera shake detection sensor. Based on the above, the control unit mounted on the camera-equipped mobile phone energizes one or both of the camera shake correction coil 230x and the camera shake correction coil 230y, and is configured on the side opposite to the subject side with respect to the lens 121. The movable module 1 is swung around one or both of the X axis and the Y axis around the pivot portion 205 formed. If such swinging is combined, the movable module 1 is swung with respect to the entire XY plane. Therefore, it is possible to surely correct all camera shakes assumed for a camera-equipped mobile phone or the like.

  In performing this camera shake correction, in this embodiment, the camera shake detection sensor is mounted on the movable module 200 itself, and the control unit (not shown) determines that the integral value of the angular velocity detected by the camera shake detection sensor, that is, the angular displacement is zero. Thus, the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y are closed-loop controlled.

  In this embodiment, since the movable module 1 is configured to be swingable by the pivot portion 205, the movable module 1 vibrates when an impact is applied from the outside. Nevertheless, in this embodiment, the spacer 290 functions as a contact portion with respect to the yoke 16 of the movable module 1, collision between the shake correction coils 230 x and 230 y and the yoke 16, and between the shake correction magnets 240 x and 240 y and the fixed body 210. Before the collision occurs, the spacer 290 comes into contact with the yoke 16 of the movable module 1. Therefore, the correction coils 230x and 230y and the camera shake correction magnets 240x and 240y can be protected. In this embodiment, the spacer 290 having an L-shaped cross section is used. However, the shape of the spacer 290 is limited to the L-shaped cross section as long as the movable module 1 vibrates first when the movable module 1 vibrates. It is not a thing. In addition, the movable module 1 and the fixed body 210 are brought into contact with each other before the collision between the shake correction coils 230x and 230y and the yoke 16 or the collision between the shake correction magnets 240x and 240y and the fixed body 210 occurs. The contact portion may be configured on either the movable module 1 side or the fixed body 210 side.

(Main effects of this form)
As described above, in the imaging optical device 200 of the present embodiment, the imaging element flexible substrate 155 that is electrically connected to the imaging element 15 is pulled out from the end of the movable module 1 opposite to the subject side. However, at the time of camera shake correction, the movable module 1 is swung around the side where the image sensor 15 is located with respect to the lens 121 (the end opposite to the subject side), so that the image sensor flexible substrate 155 is used. The deformation is extremely small. Therefore, the movable module 1 can be swung quickly. In addition, since the elastic deformation of the imaging element flexible substrate 152 when the end of the movable module 1 on the imaging element side is swung is extremely small, the shape returning force of the imaging element flexible substrate 152 received by the movable module 1 is also extremely small. . Therefore, the movable module 1 can be properly swung without being affected by the deformation of the imaging element flexible substrate 152, so that camera shake correction can be performed reliably.

  Further, in this embodiment, since the camera shake detection sensor 170 is mounted on the movable module 1 and the closed loop control is adopted, the camera shake detection sensor 170 is electrically connected from the end of the movable module 1 opposite to the subject side. The sensor flexible substrate 175 is also drawn out, but the movable module 1 is swung around the side where the image sensor 15 is located with respect to the lens 121 (the end opposite to the subject side). Since the movable module 1 can be properly swung without being affected by the deformation of the flexible substrate 155 and the sensor flexible substrate 175, camera shake correction can be performed reliably.

  Furthermore, in this embodiment, a magnetic drive mechanism is used as an actuator for correcting camera shake, and in the case of such magnetic drive, there are great advantages in terms of simplification of configuration and weight reduction, while the movable module 1 is elastic and non-contact. However, in this embodiment, the image sensor 15 is located on the side where the image sensor 15 is located (the end opposite to the object side), that is, the image sensor flexible substrate 155 and the sensor. Since the movable module 1 is swung around the side on which the flexible substrate 175 is located, the deformation of the imaging device flexible substrate 155 and the sensor flexible substrate 175 is less likely to be affected as an external force. Therefore, even the configuration in which the movable module 1 is oscillated by magnetic driving can be properly driven, so that camera shake correction with excellent responsiveness can be accurately performed.

In this embodiment, both the imaging element flexible substrate 155 and the sensor flexible substrate 175 are used by being folded in the optical axis direction, but the bent portions 155f, 155g, 155h, and 175f are all strip-shaped narrow widths. Portions 155b and 175b. For this reason, since it can be bent with a small force and the shape restoring force after the bending is small, the deformation of the imaging device flexible substrate 155 and the sensor flexible substrate 175 affects the swing of the movable module 1. Hateful. In addition, since the flexible structure 155 for the image pickup device and the flexible substrate 175 for the sensor are configured to be folded, when the movable module 1 swings, the following equation is given: Tensile strain h = ΔL / L
L: Original length
ΔL: The tensile strain h of the image sensor flexible substrate 155 and the sensor flexible substrate 175, which is indicated by the change in length, is reduced. Therefore, the following equation: Stress f = E · h
E: Since the stress f indicated by a constant is also reduced, the rocking inhibition caused by the imaging device flexible substrate 155 and the sensor flexible substrate 175 is reduced. Therefore, since the movable module 1 can be properly swung, the hand shake correction can be reliably performed.

  Further, in this embodiment, since the pivot portion 205 is used to support the movable module 1 so as to be swingable, the movable module 1 can be reliably supported so as to be swingable with a simple configuration. In addition, since the camera shake detection sensor 170 is disposed at a position overlapping the pivot portion 205 in the optical axis direction, displacement in any direction of the movable module 1 due to camera shake can be reliably detected, so that camera shake correction is reliably performed. Can be done.

  In addition, the strip-shaped narrow portions 155b and 175b of the image sensor flexible substrate 155 and the sensor flexible substrate 175 extend in parallel on both sides so as to avoid the pivot portion 205. A gap generated between the movable module 1 and the base 220 of the fixed body 210 can be effectively used as a drawing space for the imaging element flexible substrate 155 and the sensor flexible substrate 175.

Further, in the strip-shaped narrow portions 155 b and 175 b of the image sensor flexible substrate 155 and the sensor flexible substrate 175, the bent portions 155 f and 175 f toward the image sensor 15 and the camera shake detection sensor 170 are supported around the support protrusion 225. Are arranged symmetrically around the center. That is, in this embodiment, the bent portions 155f and 175f are arranged at point symmetric positions or substantially point symmetric positions. For this reason, the force exerted on the movable module 1 by the imaging device flexible substrate 155 and the sensor flexible substrate 175 is equal even when the movable module 1 swings in any direction. Accordingly, the movable module 1 can be properly swung, so that camera shake correction can be performed reliably.

  In this embodiment, the accessory module 270 is fixed to the fixed body 210 when the accessory module 270 provided with the shutter mechanism is provided on the subject side with respect to the photographing unit 1a. For this reason, even when the accessory module 270 is provided, the movable module 1 can be kept light, so that when the camera shake correction is performed, the movable module 1 can be swung quickly and with a small force.

  Furthermore, in this embodiment, the first camera shake correction magnetic drive mechanism 250x that is paired at two positions on both sides sandwiching the support protrusion 225 in the Y-axis direction is disposed, and the support protrusion 225 is interposed in the X-axis direction. A second camera shake correction magnetic drive mechanism 250y, which is a pair of two, is disposed at two positions on both sides between the two. Further, the two first camera shake correction magnetic drive mechanisms 250x each generate a magnetic force that causes the movable module 1 to swing in the same direction, and the two second camera shake correction magnetic drive mechanisms 250y each cause the movable module 1 to move. A magnetic force that swings in the same direction is generated. Therefore, a configuration in which the first camera shake correction magnetic drive mechanism 250x is arranged only on one side with respect to the support protrusion 225, or a configuration in which the second camera shake correction magnetic drive mechanism 250y is arranged only on one side with respect to the support projection 225, and On the other hand, because the driving ability is stable, camera shake can be corrected with high accuracy.

  That is, when the distance from the pivot portion 205 of one of the first first shake correction magnetic drive mechanisms 250x is shifted in the direction in which the magnetic drive force is reduced, Since the distance from the pivot portion 205 of the first camera shake correction magnetic drive mechanism 250x is shifted in the direction in which the magnetic drive force increases, the drive capability of the first camera shake correction magnetic drive mechanism 250x is stable. Similarly, when the distance from the pivot portion 205 of one of the two second image stabilization magnetic drive mechanisms 250y is shifted in the direction in which the magnetic drive force is reduced, the other Since the distance from the pivot portion 205 of the second camera shake correction magnetic drive mechanism 250y deviates in the direction in which the magnetic drive force increases, the drive capability of the second camera shake correction magnetic drive mechanism 250y is stable. .

  In addition, the positional relationship between the camera shake correction magnet 240x and the camera shake correction coil 230x constituting the first camera shake correction magnetic drive mechanism 250x is smaller than that of the two first camera shake correction magnetic drive mechanisms 250x, but the magnetic drive force is small. The first first shake correction magnetic drive mechanism 250x corrects the position shift between the shake correction magnet 240x and the shake correction coil 230x in the first first shake correction magnetic drive mechanism 250x. The first camera shake correction magnetic drive mechanism 250x has a stable drive capability because the magnetic drive force shifts in the direction in which the magnetic drive force increases. Similarly, the positional relationship between the camera shake correction magnet 240y and the camera shake correction coil 230y constituting the second camera shake correction magnetic drive mechanism 250y is the same as that of the two second camera shake correction magnetic drive mechanisms 250y. When shifted in the decreasing direction, the other second camera shake correction magnetic drive mechanism 250y corrects the position shift between the camera shake correction magnet 240y and the camera shake correction coil 230y in the one camera shake correction magnetic drive mechanism 250y. Since the direction, that is, the direction in which the magnetic driving force increases, the second camera shake correction magnetic driving mechanism 250y has a stable driving capability.

  In this embodiment, the gimbal spring 280 that presses the movable module 1 toward the support protrusion 225 extends from the inner peripheral side connecting portion 281 in the same circumferential direction and is connected to the outer peripheral side connecting portion 285. Since 287 is provided, it is point-symmetric. For this reason, since the gimbal spring 280 exhibits a substantially uniform biasing force in all directions, the posture of the movable module 1 is stable, and the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction Control of the magnetic drive mechanism 250y is extremely easy. Further, since the arm portion 287 extends in the same circumferential direction, the arm portion 287 can be extended long, so that the gimbal spring 280 has a highly linear biasing force over the entire movable range of the movable module 1. Therefore, even from this point, the camera shake can be reliably corrected without complicating the control for the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y.

  In this embodiment, in both the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y, magnets (camera shake correction magnets 240x and 240y) are held on the movable module 1 side which is the movable body side. Since the coils (shake correction coils 230x and 230y) are held on the fixed body 210 side, the number of wires for the movable module 1 on the movable body side may be small, so that the wiring structure can be simplified. Further, since the number of turns of the camera shake correction coils 230x and 230y can be increased on the fixed body 210 side, a large driving force can be exhibited. Furthermore, among the camera shake correction coils 230x and 230y and the camera shake correction magnets 240x and 240y, the camera shake correction magnets 240x and 240y having a smaller mass are provided on the movable module 1 on the movable body side. Can be reduced in weight. Therefore, since the movable module 1 can be swung with a small force, it is possible to reduce power consumption required for camera shake correction. In addition, according to the present embodiment, there is an advantage that the response to camera shake is excellent.

[Another embodiment]
(Configuration of flexible wiring member)
In forming the bent portions such as the bent portions 155f and 175f on the imaging device flexible substrate 155 and the sensor flexible substrate 175, as shown in FIG. 13, a cylindrical shape is formed inside the bent portions such as the bent portions 155f and 175f. A cylindrical bending back preventing member 159 may be bonded. With this configuration, even when the imaging element flexible substrate 155 and the sensor flexible substrate 175 are bent, the bent shapes of the imaging element flexible substrate 155 and the sensor flexible substrate 175 can be reliably maintained, and the bent portion There is an advantage that the force to open the does not affect the movable module 1.

  In the above embodiment, separate flexible substrates are connected to the image sensor 15 and the camera shake detection sensor 170, but the present invention may be applied when a common flexible substrate is connected to the image sensor 15 and the camera shake detection sensor 170.

  In the above embodiment, the imaging device flexible substrate 155 and the sensor flexible substrate 175 that are electrically connected to the imaging device 15 and the camera shake detection sensor 170 are drawn from the end of the movable module 1 opposite to the subject side. However, in place of such a flexible substrate, even when a flexible wiring member such as a resin-coated lead wire is drawn out from the end of the movable module 1 opposite to the subject side, the deformation of the flexible wiring member is also possible. Affects the movable module 1. Even in such a configuration, if the present invention is applied, the movable module 1 can be properly swung without being affected by the deformation of the flexible wiring member. Therefore, camera shake correction can be performed reliably.

(Configuration of drive mechanism)
In the above embodiment, the movable module 1 is swung around the X axis and the Y axis by the two camera shake correction magnetic drive mechanisms. However, the movable module 1 is rotated around the X axis and the Z axis by the two camera shake correction magnetic drive mechanisms. You may employ | adopt the structure rock | fluctuated around and the structure which rocks the movable module 1 around the Y-axis and the Z-axis.

  In the above embodiment, both the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y are provided for the movable module 1. However, when the user uses the shake in a direction in which camera shake is likely to occur. The present invention is applied when only one of the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y is provided so that only the first hand shake correction magnetic drive mechanism 250y is provided. Only one of the first camera shake correction magnetic drive mechanism 250x or the second camera shake correction magnetic drive mechanism 250y may be provided so as to form a pair.

In the above-described embodiment, in both the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y, a magnet (
The configuration in which the hand shake correction magnets 240x and 240y) are held and the coils (shake correction coils 230x and 230y) are held on the fixed body 210 side is adopted, but the hand shake correction is on the movable module 1 side which is the movable body side. A configuration in which a coil is held and a camera shake correction magnet is held on the fixed body 210 side may be adopted.

(Configuration of biasing means)
In the above embodiment, the gimbal spring 280 provided with a plurality of arm portions 287 linearly extending in the same circumferential direction is used as the urging means. However, the plurality of arm portions 287 are arranged in the same direction. As long as the configuration extends, a configuration in which the arm portion 287 extends while being curved may be employed.

  In the above embodiment, only the gimbal spring 280 is used as the urging means for urging the movable module 1 toward the pivot portion 205. As the urging means, the movable module 1 is applied to the pivot portion 205 by magnetic action. A magnetic spring that biases the movable module 1 and a spring member that mechanically biases the movable module 1 toward the pivot portion 205 may be used. As the spring member, the gimbal spring 280 described with reference to FIG. Can be used. Further, as the magnetic spring, it is possible to adopt a configuration in which a magnetic body is disposed on the side opposite to the subject side with respect to the camera shake correction magnets 240x and 240y in the fixed body 210. If comprised in this way, the state in which the movable module 1 is supported by the pivot part 205 can be maintained reliably. Further, during the neutral period during which the camera shake correction magnetic drive mechanism stops driving, the movable module 1 is biased toward the pivot portion 205 only by the magnetic spring, and the gimbal spring 280 is in a non-deformed state in which no biasing force is generated. It can be. In such a configuration, when the movable module 1 swings, the gimbal spring 280 is deformed and exerts an urging force. That is, the gimbal spring 280 remains flat during the period when the movable module 1 is not swinging. For this reason, since the part in which the force applied to the gimbal spring 280 and the deformation amount of the gimbal spring 280 have linearity can be used effectively, the movable module 1 can be properly swung, and camera shake correction is ensured. Can be done.

  In the present invention, in the gimbal spring 280, the connecting portion between the arm portion 287 and the outer peripheral side connecting portion 285, the connecting portion between the arm portion 287 and the inner peripheral side connecting portion 281, or the entire arm portion 287 has a gel material or an elastic sheet. It is preferable that a vibration absorbing material such as is fixed, and if such measures are taken, the vibration of the arm portion 287 can be quickly stopped when the movable module 1 is swung. The vibration can be stopped quickly.

(Configuration of swing support part)
In the above embodiment, since the support protrusion 225 is formed in a hemispherical shape, the size of the optical device for photographing 200 in the direction of the optical axis L can be shortened, but the support protrusion 225 is formed in an axial shape. Also good. Further, the portion of the sensor support substrate 115 with which the support protrusion 225 abuts may be a concavity recessed portion. Further, the support protrusion 225 may be formed on the movable module 1 side.

  Further, when supporting the movable module 1 so as to be swingable around the side opposite to the subject side, a plurality of wires extending from the side opposite to the subject side toward the subject side instead of the pivot portion 205 are provided. The suspension may be used as a swinging support portion, and the movable module 1 may be swingably supported by the plurality of wire suspensions.

(Other configurations)
In the above embodiment, the present invention is applied to the photographing optical device 200 using the photographing unit 1a in which the lens driving coils 30s and 30t are square cylinders and the lens driving magnet 17 is a flat plate. The present invention may be applied to a photographing optical apparatus using a movable module having a configuration in which 30s and 30t are cylindrical, the case 18 is a rectangular tube, and the lens driving magnet 17 is disposed at a corner portion of the case 18. .

  In the above embodiment, the example in which the present invention is applied to the photographing optical device 200 used in the camera-equipped mobile phone has been described. However, the example in which the present invention is applied to the photographing optical device 200 used in a thin digital camera or the like is described. Also good. Further, in the above embodiment, in addition to the lens 121 and the image sensor 15, the lens driving mechanism 5 that magnetically drives the movable body 3 including the lens 121 in the optical axis direction is supported on the support 2 in the movable module 1. However, the present invention may be applied to a fixed focus type photographing optical device in which the lens driving mechanism 5 is not mounted on the movable module 1.

(A), (b) is the external view which looked at the imaging | photography optical apparatus to which this invention was applied from diagonally upward on the to-be-photographed object side, and the description when the imaging | photography optical apparatus is cut | disconnected along a line parallel to an optical axis, respectively. FIG. It is a disassembled perspective view of the imaging optical device to which the present invention is applied. (A), (b) is the external view and the disassembled perspective view which respectively saw the imaging | photography unit of the movable module used for the optical device for imaging | photography which applied this invention from diagonally upward. It is explanatory drawing which shows typically operation | movement of the imaging | photography unit of the movable module shown in FIG. (A), (b) is a longitudinal sectional view when the optical device for photography to which the present invention is applied is cut at a position corresponding to the line A1-A1 ′ of FIG. 1 (a), and FIG. It is a longitudinal cross-sectional view when cut at a position corresponding to the line A2-A2 'of FIG. It is explanatory drawing which shows the structure of the magnetic drive mechanism for camera shake correction comprised to the optical device for imaging to which this invention is applied, explanatory drawing which shows the planar arrangement | positioning, and explanatory drawing which shows arrangement | positioning in an optical axis direction. It is explanatory drawing which shows the structure of the magnetic drive mechanism for another camera shake correction comprised to the optical device for imaging to which this invention is applied, explanatory drawing which shows the planar arrangement | positioning, and explanatory drawing which shows arrangement | positioning in an optical axis direction. It is explanatory drawing which shows the structure of the another magnetic drive mechanism for another camera shake correction comprised to the optical device for imaging to which this invention is applied, explanatory drawing which shows the planar arrangement | positioning, and explanatory drawing which shows arrangement | positioning in an optical axis direction. . FIG. 9 is an explanatory diagram showing a comparison in the case where the configuration shown in FIG. 6 and the configuration shown in FIG. 8 are adopted as a camera shake correction magnetic drive mechanism configured in an imaging optical device to which the present invention is applied. (A), (b), (c) are each an explanatory view of the periphery of the pivot portion of the optical device for photography to which the present invention is applied, an explanatory view of an overlapping portion of the flexible substrate for the image sensor and the sensor, and It is explanatory drawing of the state which notched the upper part. (A), (b), (c) is a development view of the imaging element flexible substrate used as the main substrate in the imaging optical device to which the present invention is applied, and an explanation of the folded state of the imaging element flexible substrate. It is explanatory drawing of the state which notched the figure and its upper part. (A), (b), (c) is a development view of a flexible substrate for sensors used as a sub-substrate in the photographing optical device to which the present invention is applied, and an explanatory view of the folded state of the flexible substrate for sensors, It is explanatory drawing of the state which notched the upper part. It is explanatory drawing of the bending part of a flexible substrate in the optical device for imaging | photography which applied this invention. It is explanatory drawing of the conventional optical device for imaging | photography.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Movable module 1a Image pick-up unit 2 Support body 3 Moving body 5 Lens drive mechanism 12 Lens holder 13 Coil holder 14s, 14t Spring member 15 Image sensor 16 Yoke 17 Lens drive magnet 19 Image sensor holder 30s, 30t Lens drive coil 155 Flexible substrate for element (flexible wiring member for imaging element)
175 Flexible substrate for sensor (flexible wiring member for sensor)
200 Photographic optical device 205 Pivot part (swing support part)
210 Fixed body 230x Hand shake correction coil (first shake correction coil)
230y Hand shake correction coil (second shake correction coil)
240x image stabilization magnet (first image stabilization magnet)
240y image stabilization magnet (second image stabilization magnet)
250x First shake correction magnetic drive mechanism 250y Second shake correction magnetic drive mechanism 260 Coil holder 280 Gimbal spring (biasing means)
L Optical axis

Claims (24)

A movable module in which a lens and an image sensor located on the opposite side to the subject side with respect to the lens are supported on a support, a fixed body that supports the movable module, and camera shake detection that detects an inclination of the movable module In a photographing optical device having a sensor and a camera shake correction mechanism that corrects camera shake by swinging the movable module on the fixed body based on a detection result of the camera shake detection sensor,
A flexible wiring member for an image sensor that is electrically connected to the image sensor is pulled out from the end of the movable module opposite to the subject side,
The camera shake correction mechanism includes: a swing support unit that swingably supports the movable module about a side where the image sensor is positioned with respect to the lens; and the image sensor that supports the movable module with respect to the lens. A shake correction magnetic drive mechanism that generates a magnetic force that swings around the position where it is located ,
The swing support portion includes a support protrusion that protrudes from one side of the movable module and the fixed body toward the other side, and a contacted portion on which the tip end portion of the support protrusion abuts on the other side. Pivot part,
The hand movement detection sensor is electrically connected to a flexible wiring member for sensors separate from the flexible wiring member for the image sensor,
Each of the flexible wiring member for the sensor and the flexible wiring member for the image sensor includes a strip-shaped narrow portion,
The strip-shaped narrow width portions of the sensor flexible wiring member and the imaging element flexible wiring member are respectively formed in the gap formed between the movable module and the fixed body by the pivot portion. An optical device for photographing characterized by being passed so as to avoid a supporting protrusion. 2. The strip-like narrow portion of each of the sensor flexible wiring member and the imaging element flexible wiring member is folded in at least one place in the optical axis direction. The optical apparatus for photography as described. The strip-like narrow width portions of each of the sensor flexible wiring member and the imaging element flexible wiring member extend in parallel so as to sandwich the pivot portion therebetween. The imaging optical device according to claim 1 or 2. Each of the strip-like narrow portions of the sensor flexible wiring member and the imaging element flexible wiring member includes a bent portion toward the camera shake detection sensor and the imaging element,
4. The photographing optical device according to claim 1, wherein the bent portion of each of the strip-shaped narrow width portions is disposed around the support protrusion and centered on the support protrusion. 5. apparatus. 4. The sensor flexible wiring member and / or the imaging element flexible wiring member includes a bent portion to which a bending back preventing member is bonded. The optical device for photography according to claim 1. Each of the strip-like narrow portions of the sensor flexible wiring member and the imaging element flexible wiring member includes a bent portion toward the camera shake detection sensor and the imaging element,
The fixed body includes a substantially rectangular base constituting a part of the pivot portion at a position opposite to the subject side with respect to the movable module,
The base includes a side plate portion that stands up toward the subject side only on two opposite sides of the bottom plate portion of the base,
A cutout is formed in a portion corresponding to the other two side portions of the bottom plate portion at a position overlapping the bent portion of the flexible wiring member for sensor and the flexible wiring member for imaging element. The photographing optical device according to claim 1, wherein the photographing optical device is provided. The support protrusion is formed on the bottom plate portion of the base;
The movable module includes a sensor support substrate at a position facing the base on the subject side,
The camera shake detection sensor is disposed on the surface of the sensor support substrate on the subject side, and the surface of the sensor support substrate opposite to the subject side is the contacted portion with which the tip of the support protrusion abuts. The photographing optical device according to claim 6, wherein the photographing optical device is provided. The flexible wiring member for a sensor and the flexible wiring member for an image sensor are both single-sided flexible substrates in which the wiring pattern is formed on one surface of the insulating base material. The photographing optical device according to any one of 1 to 7. The movable module includes a movable body supported on the support body so as to be movable in the optical axis direction with the lens, and a lens that magnetically drives the movable body in the optical axis direction between the movable body and the support body. An imaging optical device according to any one of claims 1 to 8, further comprising a drive mechanism. 10. The photographing according to claim 1, wherein the camera shake correction magnetic drive mechanism is controlled in a closed loop so that an integral value of a detection result of the camera shake detection sensor becomes zero. Optical device. The said camera shake detection sensor is arrange | positioned in the position which overlaps in the optical axis direction with respect to the said pivot part by the to-be-photographed object side with respect to the said pivot part. Optical device for photographing. Biasing means for biasing the movable module toward the pivot part;
The urging means includes an inner peripheral side connecting portion connected to the movable module, an outer peripheral side connecting portion connected to the fixed body, and an outer peripheral side connecting portion extending from the inner peripheral side connecting portion. 12. The photographing optical device according to claim 1, wherein the photographing optical device is a gimbal spring including a plurality of arm portions connected to each other. The gimbal spring is in a deformed state in which a biasing force that biases the movable module toward the pivot portion is generated even during a neutral period during which the camera shake correction magnetic drive mechanism stops driving. Item 15. The photographing optical device according to Item 12. Biasing means for biasing the movable module toward the pivot part;
The biasing means includes a magnetic spring that biases the movable module toward the pivot portion by a magnetic action, and a spring member that mechanically biases the movable module toward the pivot portion,
The spring member extends from the inner peripheral side connecting portion connected to the movable module, the outer peripheral side connecting portion connected to the fixed body, and connected to the outer peripheral side connecting portion. The photographing optical device according to claim 1, wherein the photographing optical device is a gimbal spring including a plurality of arm portions. The imaging optical device according to claim 11, wherein a vibration absorbing material is fixed to at least a part of the arm portion. The camera shake correction magnetic drive mechanism generates a magnetic force that causes the movable module to swing in the same direction in pairs at two locations facing each other with the swing center of the movable module in between. The optical device for photographing according to any one of claims 1 to 15. When the three directions orthogonal to each other are the X axis, the Y axis, and the Z axis, respectively, and the direction parallel to the optical axis is the Z axis,
Between the movable module and the fixed body, two sets of magnetic drive force for swinging around two of the X-axis, Y-axis, and Z-axis are generated as the camera-shake correction magnetic drive mechanism. 17. The photographing optical device according to claim 16, wherein a camera shake correction magnetic drive mechanism is configured. The two sets of camera shake correction magnetic drive mechanisms are magnetic drives that oscillate the movable module around the X axis in pairs at two locations facing each other across the oscillation center of the movable module in the Y-axis direction. A pair of the first camera shake correcting magnetic drive mechanism for generating a force and the movable module are swung around the Y axis in a pair at two positions facing each other with the rocking center of the movable module in between in the X axis direction. A second image stabilization magnetic drive mechanism for generating a magnetic drive force,
The first camera shake correction magnetic drive mechanism includes a first camera shake correction magnet disposed at each of two locations on the movable module in the Y-axis direction, and the first camera shake correction magnet at the two locations. A first camera shake correction coil facing each other in the Y-axis direction,
The second camera shake correction magnetic drive mechanism includes: a second camera shake correction magnet disposed at each of two locations located in the X-axis direction on the movable module; and the second camera shake correction magnet at the two locations. The photographic optical device according to claim 17, further comprising a second camera shake correction coil facing each other in the X-axis direction. In the first camera shake correction coil, the side portion extending in the X-axis direction at a position shifted in the Z-axis direction from the position facing the first camera shake correction magnet in the Y-axis direction is an effective side. And
In the second camera shake correction coil, the side portion extending in the Y-axis direction at a position shifted in the Z-axis direction from a position facing the second camera-shake correction magnet in the X-axis direction is an effective side. The photographing optical device according to claim 18, wherein the photographing optical device is provided. The first camera shake correction magnet and the second camera shake correction magnet are magnetized to different poles on the outer surface side,
In addition to the side portion extending in the X-axis direction, the side portion extending in the Z-axis direction is an effective side of the first camera shake correction coil,
The second camera shake correction coil is characterized in that, in addition to the side portion extending in the Y-axis direction, a side portion extending in the Z-axis direction is also an effective side. 19. An optical device for photographing according to 19. The first camera shake correction magnet and the second camera shake correction magnet are each magnetized with different poles in the Z-axis direction,
The first camera shake correction coil has side portions extending in the X-axis direction so as to face each part magnetized on different poles of the first camera shake correction magnet in the Y-axis direction. The effective side
The second camera shake correction coil has side portions extending in the Y-axis direction so as to face each part magnetized on different poles of the second camera shake correction magnet in the X-axis direction. The photographing optical device according to claim 18, wherein the photographing optical device is an effective side. 22. The first camera shake correction coil and the second camera shake correction coil are held on each surface of a rectangular tube-shaped coil holder disposed outside the movable module. The imaging optical device according to any one of the above. Between the fixed body and the movable module, when the movable module vibrates, a collision between the movable module and the camera shake correction coil and a collision between the camera shake correction magnet and the fixed body occur. The photographing optical device according to any one of claims 18 to 22, wherein a contact portion is disposed each time the movable module and the fixed body are brought into contact with each other. The photographing optical device according to any one of claims 1 to 23, wherein an attachment module including a shutter mechanism is fixed to the fixed body on a subject side with respect to the movable module. .

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