JP2018174496A - Camera device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera device capable of improving dust removal performance attached to a translucent member positioned in front of an image sensor included in the camera device having a shake correction unit.SOLUTION: A camera device includes an image sensor that images an image of a subject, a lens unit that has a lens for forming an image of a subject on the light receiving surface of the image sensor, a shake correction unit that has a movable unit for holding the image sensor and moves the movable unit in a direction perpendicular to an optical axis of the lens unit in accordance with shaking of the camera device to correct the shake, a driver that supplies a shake signal for repetitively moving the movable unit in a direction perpendicular to the optical axis of the lens part to the shake correction part and vibrates the movable unit according to the shake signal, and a wiper that moves along a translucent member positioned in front of the image sensor and wipes the translucent member.SELECTED DRAWING: Figure 7

Description

  The present disclosure relates to a camera device having a shake correction function.

  2. Description of the Related Art Conventionally, there has been known a camera module including a camera shake correction unit that shifts the position of an image sensor unit including an image sensor and a low-pass filter in order to perform camera shake correction during imaging (see Patent Document 1). It is also known to try to remove dust attached to the low-pass filter on the image sensor by operating the camera shake correction unit to reciprocate (vibrate) the image sensor unit (see Patent Document 2).

JP 2014-45304 A JP 2008-311925 A

  The dust adhering to the low-pass filter (an example of the translucent member) on the image sensor has a small mass. Therefore, even if the image stabilization unit is vibrated by operating the camera shake correction unit, the inertial force acting on the dust is small and the dust is difficult to be removed. In addition, by vibrating the image sensor unit, static electricity between the low-pass filter and the dust increases, and the dust becomes more difficult to remove. In addition, as the resolution of the camera device becomes higher and the number of pixels of the image sensor increases, smaller dust tends to be clearly reflected in the image. The light receiving surface of the image sensor is protected by a light transmissive member such as a protective glass.

  The present disclosure has been made in view of the above circumstances, and provides a camera device capable of improving the removal performance of dust attached to a translucent member positioned in front of an image sensor included in a camera device having a shake correction unit. .

  The camera device of the present disclosure includes an image sensor that captures an image of a subject, a lens unit that has a lens that forms an image of the subject on a light receiving surface of the image sensor, and a movable unit that holds the image sensor. In accordance with the shake of the camera device, a shake correction unit that moves the movable unit in a direction perpendicular to the optical axis of the lens unit and corrects the shake, and the movable unit is repeated in a direction perpendicular to the optical axis of the lens unit. A vibration signal for movement is supplied to the vibration correction unit, and the light transmission unit moves along a translucent member positioned in front of the image sensor and a driver that vibrates the movable unit according to the vibration signal. And a wiper for wiping the sex member.

  According to the present disclosure, it is possible to improve the performance of removing dust attached to the front surface of the image sensor.

The perspective view of a surveillance camera provided with the shake correction mechanism in a 1st embodiment. The perspective view which represented the other surveillance camera provided with the shake correction mechanism in 1st Embodiment with a part of internal structure. A perspective view of the surveillance camera shown in FIG. A perspective view of the shake correction mechanism shown in FIG. FIG. 3 is a perspective view of the shake correction mechanism shown in FIG. Exploded perspective view of lens part, lens mount base, element holder, first stage swing member and next stage swing member Block diagram showing a schematic configuration example of a surveillance camera Block diagram showing a detailed configuration example of a surveillance camera related to shake correction Schematic side view showing an example of movement of the BIS mechanism unit by the ABF mechanism Schematic side view showing an example of movement of the BIS mechanism unit by the ABF mechanism Schematic side view showing an example of movement of the BIS mechanism unit by the ABF mechanism Exploded perspective view for explaining the internal configuration of the surveillance camera related to the interlocking operation of the brush and the optical filter The figure which shows the example of arrangement | positioning of an optical filter and a brush when an operation mode is set to monochrome mode The figure which shows the example of arrangement | positioning of an optical filter and a brush when an operation mode is set to the cleaning mode The figure which shows the example of arrangement | positioning of an optical filter and a brush when an operation mode is set to the color mode Side view showing an arrangement example of the image sensor, protective glass, brush, and optical filter when set to monochrome mode Side view showing an arrangement example of the image sensor, protective glass, brush, and optical filter when the cleaning mode is set Side view showing an arrangement example of the image sensor, protective glass, brush, and optical filter when the color mode is set Flow chart showing an example of operation during the cleaning operation of the surveillance camera

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the claimed subject matter.

(First embodiment)
FIG. 1 is a perspective view of a monitoring camera 200 (200A) including a shake correction mechanism 100 according to the first embodiment.

  The shake correction mechanism 100 can be applied to, for example, the dome-type monitoring camera 200A shown in FIG. The monitoring camera 200A includes a cylindrical outer cover 11 having a conical surface, for example. The upper end of the outer cover 11 has a mounting cylinder 13 that is fixed to a mounted body such as a ceiling or a pole. The monitoring camera 200 </ b> A is attached by hanging down from a pole or the like with the mounting cylinder 13 on the upper side in the vertical direction. The outer cover 11 functions as a rain guard. The mounting cylinder 13 is screwed with a plurality of fixing bolts 15 for fixing inserted poles and the like at equal intervals in the circumferential direction. The mounting cylinder 13 leads to the inside of the outer cover 11. In the outer cover 11, a power supply line and a signal line passed through a pole or the like are introduced through the mounting cylinder 13.

  The lower surface of the outer cover 11 is, for example, a circular opening. For example, an annular ring cover 17 is detachably attached to the circular opening. From the inner hole 19 of the ring cover 17, for example, a hemispherical side of a dome cover 21 made of a transparent resin material hangs down. The dome cover 21 includes a hemispherical outer shell and a cylinder connected with the same radius to the opening periphery of the hemispherical outer shell. The cylinder has a flange (not shown) fixed to the ring cover 17 on the side opposite to the hemispherical outer shell. The dome cover 21 is fixed with this flange disposed between the ring cover 17 and the outer cover 11.

  The dome cover 21 uses, for example, a resin material having excellent moldability and transparency as a substrate material. As the resin material, an organic resin material or an inorganic resin material can be used. In this embodiment, an organic resin material such as polycarbonate is used as the substrate material of the hemispherical outer shell. Polycarbonate is suitable because it is hard and resistant to impact. Also, a resin having good transparency such as acrylic can be used.

  The inside of the dome cover 21 is a camera housing space. In the camera housing space, the camera unit 23 that can freely perform pan rotation and tilt rotation about a pan rotation center Pc in a direction along the vertical direction and a tilt rotation center Tc that intersects the pan rotation center Pc at a right angle. Is placed. The camera unit 23 includes a lens unit 27 in the camera housing 25. The camera housing 25 is provided with a BIS mechanism unit 29 that performs a correction process that considers the influence of the shake of the camera unit 23 (hereinafter sometimes referred to as “shake correction” (BIS: in body image stabilizer)). . The BIS mechanism unit 29 includes a shake correction mechanism 100 that is fixed to a lens mount base 31 as an example of a base of the camera housing 25. An image sensor (not shown) is attached to the shake correction mechanism 100.

  FIG. 2 is a perspective view showing another surveillance camera 200 (200B) including the shake correction mechanism 100 together with a part of the internal structure.

  In the present embodiment, the up / down / front / rear / right / left directions follow the directions of the arrows shown in FIG. 2, but these directions can be similarly applied to the monitoring camera 200A shown in FIG.

  The shake correction mechanism 100 can be applied to the box-type monitoring camera 200B shown in FIG. 2 as well as the dome-type monitoring camera 200A shown in FIG. The monitoring camera 200B houses a camera unit 23 (not shown in FIG. 2) in a box-like camera housing 33.

  The camera unit 23 includes a lens unit 35. The camera unit 23 is provided with a BIS mechanism unit 29 (not shown in FIG. 2) that performs correction (shake correction) processing that takes into account the influence of shaking of the camera unit 23. The BIS mechanism unit 29 includes a shake correction mechanism 100 that is fixed to a lens mount base 37 as an example of a base of the camera housing 33. The shake correction mechanism 100 is fixed to the lens mount base 37. The lens mount base 37 is fixed to the camera housing 33. An image sensor, which will be described later, is attached to the shake correction mechanism 100.

  FIG. 3 is a perspective view of the monitoring camera 200B shown in FIG.

  The lens mount base 37 is fixed to the camera housing 33 by a fixing bracket 39. The lens mount base 37 supports the lens unit 35 on one surface (for example, the front surface 41 shown in FIG. 2). In the lens mount base 37, a light receiving window (not shown) opens on the other surface (for example, the back surface 43) perpendicular to the optical axis Oc passing through the lens portion 35.

  The monitoring camera 200B includes an ABF (Auto Back Focus) mechanism 250. The fixing bracket 39 is at least a part of the outer periphery of the ABF mechanism 250. The ABF mechanism 250 includes an ABF motor 251, a slide guide pin 252, and an ABF preload spring 253. A BIS mechanism unit 29 is mounted inside the ABF mechanism 250. The BIS mechanism unit 29 is movable along the direction of the optical axis Oc inside the ABF mechanism 250.

  In FIG. 3, the slide guide pin 252 and the ABF preload spring 253 are shown on the right side of the BIS mechanism unit 29 (see the direction information shown in FIG. 3), but are similarly arranged on the left side of the BIS mechanism unit 29 ( (Not shown).

  The ABF motor 251 supplies a driving force for moving the BIS mechanism unit 29 in the front-rear direction within a range in the front-rear direction (optical axis direction) defined by the fixed bracket 39. The shaft 251 a of the ABF motor 251 can extend and contract in the front-rear direction, and presses the rear surface 29 a of the BIS mechanism unit 29 according to the driving force of the ABF motor 251. The ABF motor 251 can be used to adjust the focus by moving the BIS mechanism unit 110 in the front-rear direction. In addition, the ABF motor 251 moves the BIS mechanism unit 110 in the front-rear direction even when the front protective glass of the image sensor included in the BIS mechanism unit 110 is cleaned.

  The slide guide pin 252 is disposed along the optical axis Oc between the fixed bracket 39 of the ABF mechanism 250 and the BIS mechanism unit 110. The slide guide pins 252 are disposed on the left and right sides of the BIS mechanism unit 110.

  The ABF preload spring 253 is disposed along the optical axis Oc between the fixed bracket 39 of the ABF mechanism 250 and the BIS mechanism unit 110. A slide guide pin 252 is coaxially disposed inside the ABF preload spring 253 in the radial direction. The ABF preload spring 253 arranges the BIS mechanism unit 110 at a predetermined position in the front-rear direction against the pressing of the BIS mechanism unit 110 by the shaft 251a of the ABF motor 251. In this case, the BIS mechanism unit 110 is fixed at a position where the force pressing forward by the shaft 251a and the force pressing the BIS mechanism unit 110 backward by the elastic force of the ABF preload spring 253 are balanced. The ABF preload springs 253 are disposed on the left and right sides of the BIS mechanism unit 110.

  The ABF mechanism 250 is applicable not only to the monitoring camera 200B but also to the monitoring camera 200A.

  The monitoring camera 200B is attached to a ceiling surface, a wall surface, or a pole, for example. The camera mount 47 shown in FIG. 2 is fixed to the ceiling surface, wall surface, or pole. The camera mounting base 47 includes a fixed flange portion 49, a support column 51 protruding from the fixed flange portion 49, and a direction adjusting unit 53 provided at the tip of the support column 51. The direction adjusting portion 53 has a tripod mounting screw 55 at the tip. The tripod mounting screw 55 is screwed into the tripod mounting seat 57 of the camera housing 33 and fixed by the fixing ring 59.

  The direction adjusting portion 53 supports a spherical body (not shown) provided at the base end of the tripod mounting screw 55 on a bearing with a spherical pair. Therefore, the tripod mounting screw 55 enables a pivoting action in which the sphere changes its direction or rotates within the bearing. The direction adjusting unit 53 supports the camera housing 33 with a tripod mounting screw 55 so that the camera casing 33 can rotate around the pan rotation center Pc in the vertical direction, and is centered on the tilt rotation center Tc on the pan rotation center Pc. It is supported in a tiltable manner.

  When the monitoring camera 200B is attached to a ceiling surface, a wall surface, or a pole, a shooting direction is set. For example, when the camera is attached to a ceiling surface, the shooting direction is set slightly inclined. In the monitoring camera 200B in which the shooting direction is set, the tripod mounting screw 55 (spherical pair) is fixed by the fixing lever 61 of the direction adjusting unit 53.

  The shake correction mechanism 100 may be provided in any of the monitoring camera 200A and the monitoring camera 200B as the monitoring camera 200 described above.

  FIG. 4 is a perspective view of the shake correction mechanism 100 shown in FIG.

  The shake correction mechanism 100 includes a lens mount base 37, a first-stage swing member 63, a next-stage swing member 65, and an element holder 67. In the shake correction mechanism 100, the first stage swing member 63 assembled with the next stage swing member 65 and the element holder 67 is fixed to the lens mount base 37.

  FIG. 5 is a perspective view of the shake correction mechanism 100 shown in FIG.

  In the shake correction mechanism 100, the next-stage swing member 65 is disposed between the pair of legs 69 in the first-stage swing member 63. The first stage swing member 63 is fixed to the lens mount base 37 and is movable. The next stage swinging member 65 is further movably supported inside the first stage swinging member 63. That is, the first-stage swing member 63 and the next-stage swing member 65 are assembled in two stages with a nested structure. The next-stage swing member 65 that is attached to the first-stage swing member 63 and is movable is separated so as not to interfere with the lens mount base 37. That is, the next-stage swinging member 65 is disposed to face the lens mount base 37 without contact.

  FIG. 6 is an exploded perspective view of the lens portion 27, the lens mount base 31, the element holder 67, the first-stage swing member 63, and the next-stage swing member 65.

  An element holder 67 is fixed to the next-stage swing member 65. The element holder 67 has a substantially rectangular heat sink 71. The heat sink 71 is provided with a plurality of cooling fins (not shown). In the heat sink 71, heat from the image sensor 73 is transmitted by heat conduction. The heat sink 71 exhausts heat transferred from the image sensor 73 into the air by the cooling fins. That is, the image sensor 73 is air-cooled.

  A first coil 75 is attached to the vertical side and a second coil 77 is attached to the horizontal side of two adjacent sides of the element holder 67 that are orthogonal to each other. The first coil 75 and the second coil 77 correspond to the first linear motor 83 and the second linear by a first magnet 79 and a second magnet 81 provided on two adjacent sides of the lens mount base 37 so as to correspond to each other. A motor 85 is configured. In other words, the first coil 75 and the first magnet 79 constitute a first linear motor 83, and the second coil 77 and the second magnet 81 constitute a second linear motor 85. The first linear motor 83 and the second linear motor 85 constitute an actuator 87 for moving the element holder 67 in the biaxial direction.

  The actuator 87 drives the element holder 67 (in other words, the image sensor 73) in the left-right direction by the first linear motor 83, and further moves the element holder 67 (in other words, the image sensor 73) in the vertical direction by the second linear motor 85. To drive.

  The shake correction mechanism 100 allows the image sensor 73 to freely move in two axial directions perpendicular to the optical axis Oc of the lens unit 27. For this reason, when the monitoring cameras 200A and 200B are shaken by an external force or the like, the monitoring cameras 200A and 200B move the image sensor 73 in a direction to cancel the shaking, thereby degrading the image quality of the captured image (image blurring). ) Can be suppressed, and a good image can be obtained.

  Next, a specific configuration example of the monitoring camera 200 with the cleaning function added will be described.

  FIG. 7 is a diagram illustrating a schematic configuration example of the monitoring camera 200 with the cleaning function added. Note that description of the components described above may be omitted or simplified.

  In FIG. 7, the lens unit 130 and the gyro sensor 140 indicated by dotted lines indicate the movement of the position due to the shaking of the monitoring camera 200.

  The surveillance camera 200 includes a BIS mechanism unit 110, a lens unit 130, a gyro sensor 140, an integrator 141, a data converter 143, a comparator 160, a motor driver 170, a BIS motor 180, and a DSP (Digital Signal Processor) 190. The monitoring camera 200 includes a brush 203, an optical filter 204, a filter motor 207, an ABF mechanism 250, an ABF motor 251, and a CPU (Central Processing Unit) 260. The BIS mechanism unit 110 is, for example, the BIS mechanism unit 29. The lens unit 130 is, for example, the lens unit 27 and the lens unit 35. The image sensor 104 is an image sensor 73, for example. The BIS motor 180 is, for example, the first linear motor 83 or the second linear motor 85.

  The image sensor 104 may be formed including a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). A protective glass 105 is arranged in front of the image sensor 104 (subject side) so as to cover the light receiving surface of the image sensor 104. The light receiving surface of the image sensor 104 is protected by the protective glass 105.

  The BIS mechanism unit 110 includes a shake correction mechanism 100, a position sensor 150, and a BIS motor 180.

  The lens unit 130 includes one or more lenses 131 that form an image of the subject B1 (see FIG. 8) on the light receiving surface of the image sensor 104. The lens 131 can be replaced with a lens having various focal lengths and imaging ranges depending on the installation location of the monitoring camera 200 and the imaging application.

  The gyro sensor 140 may be installed in the housing of the lens unit 130. The gyro sensor 140 detects an angular velocity. This angular velocity may indicate an angular velocity related to the shaking of the lens unit 130, that is, an angular velocity related to the shaking of the monitoring camera 200.

  The position sensor 150 detects the position x of the image sensor 104. The position x of the image sensor 104 can also be said to be the position of the movable part A2 including the image sensor 104. The position x of the image sensor 104 may be the position of the image sensor 104 in the direction perpendicular to the optical axis Oc (for example, the vertical direction in FIG. 7) with respect to the lens unit 130.

  When the lens unit 130, that is, the monitoring camera 200 is not shaken, the position x of the image sensor 104 indicates the reference position xs. That is, x = xs. The reference position may indicate a value of 0 when the monitoring camera 200 is not shaken, or may indicate a value other than the value of 0. The reference position xs may be a value that takes into account the optical axis adjustment of the lens unit 130.

  The comparator 160 is connected to the comparator 141 and the data converter 143 based on the information on the angular velocity ω detected by the gyro sensor 140 and the information on the position x of the image sensor 104 detected by the position sensor 150. 160 output values are determined. The comparator 160 may determine the output value of the comparator 160 based on the distance displacement amount Δx based on the angular velocity ω and information on the position x of the image sensor 104. When the angular velocity ω is not 0, it indicates that the angular velocity is generated in the lens unit 130, that is, that the lens unit 130 is swayed (swing angle Δθ, sway amount Δx). That is, it shows that the monitoring camera 200 is shaking (swing amount Δx). The comparator 160 sends the value of (x−Δx) to the motor driver 170 as an output value so as to cancel the shaking of the lens unit 130.

  The motor driver 170 drives the BIS motor 180 based on the output value of the comparator 160. The motor driver 170 may perform PID (Proportional-Integral-Diferential) control on the BIS motor 180. That is, based on the value of (x−Δx), the motor driver 170 makes the displacement amount Δx of the distance based on the angular velocity ω detected by the gyro sensor 140 become 0, that is, cancels Δx. The BIS motor 180 may be feedback controlled.

  The BIS motor 180 supplies a driving force so as to adjust the position of the image sensor 104 according to a command from the motor driver 170. Specifically, the BIS motor 180 may move the movable part A2 in the vertical direction in FIG. 7 so that the position of the image sensor 104 becomes the position of x−Δx. Thereby, the movement of the displacement amount Δx of the distance based on the currently generated angular velocity ω is canceled out, and the image sensor 104 is controlled to move to the position x.

  The DSP 190 performs various image processing on the captured image captured by the image sensor 104. For example, the DSP 190 may correct the color tone of the captured image. The tone correction may include white balance correction. The DSP 190 may correct the white balance after cleaning the front surface of the image sensor 104, for example.

  The DSP 190 is an example of a processor, and other processors may be used. For example, instead of the DSP 190, a CPU (Central Processing Unit), a DSP (Digital Signal Processor), or a GPU (Graphical Processing Unit) may be used.

  The brush 203 comes in contact with the protective glass 105 and wipes and cleans it. The brush 203 may be made of a nonwoven fabric, for example. Or a brush-like member may be sufficient. A cleaning member for the brush 203 may be used. For example, a substantially square pad-shaped cleaning member may be used. The brush 203 is disposed at a position close to the front side of the protective glass 105. The front side can also be said to be the upstream side on the optical axis Oc.

  The brush 203 may be formed of wool, nylon, silk, or the like. Wool, nylon, and silk are all materials that easily become a positive electrode in the triboelectric train. The protective glass 105 disposed in front of the image sensor 104 is also a material that easily becomes a positive electrode in the triboelectric train. Therefore, although the brush 203 and the protective glass 105 are in contact with each other, static electricity is hardly generated between the brush 203 and the protective glass 105 by using the brush 203 formed of wool, nylon, silk, or the like.

  The optical filter 204 includes a color filter 205 used when shooting in the color mode and a monochrome filter 206 used when shooting in the monochrome mode. An IR cut filter may be used as the color filter 205. Optical glass (elementary glass) may be used as the black and white filter 206. The optical filter 204 is moved in a direction perpendicular to the optical axis direction (for example, the vertical direction in FIGS. 7 and 8) by the driving force of the filter motor 207, and the color filter 205 and the monochrome filter 206 are switched. The optical filter 204 is disposed on the front side of the brush 203.

  The filter motor 207 supplies a driving force to the optical filter 204 to move the optical filter 204 in a direction perpendicular to the optical axis Oc. Accordingly, the filter motor 207 switches the optical filter 204 positioned on the optical axis Oc to be the color filter 205 or the black and white filter 206. The filter motor 207 may move the brush 203 in a direction perpendicular to the optical axis Oc in conjunction with the optical filter 204.

  The ABF motor 251 supplies driving force to the shaft 251a. In accordance with the focus control signal from the CPU 260, the ABF motor 251 moves the BIS mechanism unit 110 along the front-rear direction (optical axis direction) to adjust the focus. The ABF motor 251 moves the BIS mechanism unit 110 along the front-rear direction (optical axis direction) in accordance with a cleaning control signal from the CPU 260.

  The CPU 260 controls each unit in the monitoring camera 200. The CPU 260 implements various functions (for example, a cleaning function) by executing a program held in the memory M1.

  For example, the CPU 260 sets the operation mode of the monitoring camera 200. The operation mode setting information may be held in the memory M1. The operation modes include an imaging mode for imaging the subject B1 (see FIG. 8) by the image sensor 104 and a cleaning mode for cleaning the protective glass 105. The imaging mode includes a color mode suitable for daytime photography and a monochrome mode suitable for nighttime photography.

  The CPU 260 may control the filter motor 207. The CPU 260 may control the ABF motor 251. The CPU 260 may perform control related to the cleaning operation. The CPU 260 may control the timing for performing the cleaning operation.

  For example, the CPU 260 may control to perform a cleaning operation when the protective glass 105 is dirty. Whether the protective glass 105 is dirty may be determined based on whether or not a predetermined amount or more of dust is attached. For example, the same subject does not move, the same subject appears in the same position in the captured image even if the direction of the lens unit 130 is changed, and the same subject appears in the captured image even after zooming up. Or the like. The surveillance camera 200 can try to remove dust efficiently by performing a cleaning operation when the protective glass 105 is dirty.

  The CPU 260 may control to perform the cleaning operation in a predetermined time zone. For example, it is considered that the monitoring camera 200 that monitors the road has a low necessity for monitoring when the traffic volume is low at midnight. In this case, if the CPU 260 measures the current time and determines that the current time corresponds to the midnight time zone, the CPU 260 may perform a cleaning operation. Thereby, the surveillance camera 200 can clean the protective glass 105 while avoiding a time zone in which imaging is important.

  The CPU 260 may control the cleaning operation by detecting a user operation on the operation unit 270. That is, the CPU 260 may control the cleaning operation through a manual operation by the user. Thereby, the monitoring camera 200 can clean the protective glass 105 at a user-desired timing.

  The CPU 260 may control to perform the cleaning operation by acquiring a cleaning instruction signal via the communication unit 280 or various ports. Thereby, even when the surveillance camera 200 is installed at a position far from the administrator of the surveillance camera 200, it can remotely instruct through the network and clean the protective glass 105.

  The CPU 260 is an example of a processor, and other processors may be used. For example, instead of the CPU 260, an MPU (Micro Processing Unit), a DSP (Digital Signal Processor), or a GPU (Graphical Processing Unit) may be used.

  The operation unit 270 includes various keys, buttons, a touch panel, and the like, and accepts various operations by the user. The operation unit 270 may include a cleaning button for starting a cleaning operation. An input device other than the operation unit 270 (for example, a microphone for inputting voice) may be used.

  The communication unit 280 communicates via wired or wireless. The communication unit 280 may receive an instruction signal for instructing cleaning from a communication device outside the monitoring camera 200.

  The memory M1 holds various data, programs, tables, values, and the like. The memory M1 may include a RAM (Random Access Memory) and a ROM (Read Only Memory). The memory M1 may hold information on the reference position xs.

  FIG. 8 is a diagram illustrating a detailed configuration example of the monitoring camera 200 related to shake correction. In the monitoring camera 200, in FIG. 8, one direction along the light receiving surface of the image sensor 104 may be the gravity direction α, or may be another direction. In FIG. 8, the description of the same components as in FIG. 7 may be omitted or simplified.

  The BIS mechanism unit 110 includes a fixed part A1 and a movable part A2. The fixing unit A1 may include a lens unit 130, a lens mount base 135, a part of the position sensor 150, and a part of the BIS motor 180. The lens mount base 135 is fixedly connected to the lens unit 130. A part of the position sensor 150 (for example, the magnet 152) and a part of the BIS motor 180 (for example, the magnet 182) are installed on the surface facing the movable part A2. Since the magnet 152 and the magnet 182 have larger mass than the Hall element 151 and the coil 181, it is preferable that the magnet 152 and the magnet 182 are installed in the fixed portion A <b> 1. The lens mount base 135 is fixed to a camera housing (for example, the camera housing 25 or the camera housing 33). That is, the position of the fixing unit A1 with respect to the monitoring camera 200 main body is fixed. The fixing portion A1 includes at least a lens portion 130 and a lens mount base 135. The lens mount base 135 is, for example, the lens mount base 37. The magnet 152 is, for example, the first magnet 79 or the second magnet 81.

  The movable part A2 includes a substrate 102 and various electrical components and electronic components (at least the image sensor 104) mounted on the substrate 102. The movable part A <b> 2 may include the image sensor 104, the sensor substrate 106, a part of the position sensor 150, and a part of the BIS motor 180. A part of the position sensor 150 (for example, the hall element 151) and a part of the BIS motor 180 (for example, the coil 181) are installed on the surface facing the fixed portion A1. The movable part A2 includes at least the image sensor 104. The coil 181 is, for example, the first coil 75 or the second coil 77.

  The movable portion A2 has a variable positional relationship with the lens unit 130. That is, the movable part A2 moves (moves) with respect to the lens part 130. The movable part A2 moves in a direction orthogonal to the optical axis Oc in accordance with the shaking generated in the monitoring camera. In FIG. 8, the movement is perpendicular to the optical axis Oc and moved along the gravity direction α. In FIG. 8, the movable part A2 may move in the gravity direction α and the horizontal direction perpendicular to the gravity direction α (another direction orthogonal to the optical axis Oc, the depth direction in FIG. 8). Unlike the fixed portion A1, the movable portion A2 is not fixed in position with respect to the monitoring camera 200 main body, and moves according to shaking. When the monitoring camera 200 is shaken, the movable part A2 moves so as to cancel the displacement of the position of the image sensor 104 due to the shake.

  The monitoring camera 200 may include a gyro sensor 140, an integrator 141, an amplifier 142, and a data converter 143. The integrator 141 integrates the angular velocity ω, which is a detection value detected by the gyro sensor 140, to obtain information on the angle change amount Δθ. The amplifier 142 amplifies the signal indicating the change amount Δθ of the angle obtained by the integrator 141.

  The data converter 143 converts the information on the angle change Δθ output from the amplifier 142 into information on the displacement Δx of the distance (length). The data converter 143 may convert the angle information into the distance information based on the relationship between the angle change amount Δθ of the lens unit 130 and the distance displacement amount Δx corresponding to the angle change amount Δθ. . Information on the displacement amount Δx of each distance corresponding to the change amount Δθ of each angle may be stored in a conversion table (not shown) as displacement correspondence information and held in the memory M1. The data converter 143 may derive information on the distance displacement amount Δx from the information on the angle change amount Δθ by referring to the conversion table. This conversion table may be prepared for each lens attached to the monitoring camera 200. This is because when the lens attached to the monitoring camera 200 is replaced, the focal length changes, and the relationship between the angle change amount Δθ and the distance displacement amount Δx changes.

  The monitoring camera 200 may include a position sensor 150, a hall element amplifier 153, and a selection unit 155.

  The position sensor 150 is formed including a hall element 151 and a magnet 152, and may function as a hall sensor. The detection value of the position sensor 150 indicates the position x of the image sensor 104, and may be the reference position xs when the monitoring camera 200 is not shaken. When the movable part A2 moves in a direction opposite to the direction of the force component of gravity (downward in FIG. 8) (upward in FIG. 8) from the reference position xs, the detection value of the position sensor 150 is, for example, the reference position xs It may be larger than the value of. When the movable part A2 moves in the direction of the gravity force rather than the reference position xs along the direction of the gravity force F1, the detection value of the position sensor 150 becomes smaller than the value of the reference position xs, for example. It's okay.

  The hall element amplifier 153 amplifies a signal indicating a detection value (detection value of the position sensor 150) detected by the hall element 151.

  The comparator 160 compares the distance displacement amount Δx obtained by the data converter 143 with the position x of the image sensor 104 obtained by the position sensor 150. The comparator 162 sends information (x−Δx), which is the difference between these values x and Δx, to the motor driver 170. When the surveillance camera 200 is not shaken, the displacement amount Δx of the distance of the movable part A2 is 0. In this case, the movable part A2 is adjusted so that the image sensor 104 is disposed at the position x.

  The motor driver 170 may feedback control the BIS motor 180 based on the difference (x−Δx) obtained from the comparator 160.

  The BIS motor 180 is formed including a coil 181 and a magnet 182 and may function as a linear motor. The coil 181 may be a loop coil. In response to a command from the motor driver 170, the BIS motor 180 changes the position of the movable part A2 relative to the fixed part A1, that is, the position of the image sensor 104 relative to the lens part 130, to the position of the difference (x−Δx) obtained by the comparator 160. Adjust so that The position of the BIS motor 180 may be adjusted by a positional relationship between the coil 181 and the magnet 182 by a linear motor. The BIS motor 180 adjusts the position of the movable part A2 in the direction along the surface of the substrate 102 of the movable part A2 by driving the linear motor.

  7 and 8 exemplify the detection of the movement of the movable portion A2 in the direction of one axis perpendicular to the optical axis Oc (the vertical direction in FIGS. 7 and 8), and correcting the shaking. The same applies to the detection of the movement of the movable portion A2 in the direction of another axis perpendicular to the optical axis Oc.

  Next, the cleaning operation of the protective glass 105 by the monitoring camera 200 will be described.

  The monitoring camera 200 performs a cleaning operation for cleaning the protective glass 105 by both the vibration operation of the movable portion A2 in the BIS mechanism unit 110 and the rotation operation by the brush 203. In the vibration operation of the movable part A2, the motor driver 170 sends a vibration signal for vibrating the movable part A2 in the BIS mechanism unit 110 to the BIS motor 180 to vibrate the movable part A2. As the movable part A2 vibrates, the image sensor 104 mounted on the movable part A2 also vibrates. Thereby, the BIS mechanism unit 110 tries to make the dust adhering to the protective glass 105 float from the protective glass 105 and drop by gravity. In the rotation operation of the brush 203, the brush 203 reciprocates at least once in the vertical direction along the protective glass 105 so as to wipe the surface of the protective glass 105 on the subject side. Thereby, the brush 203 tries to wipe off the dust adhering to the protective glass 105. Note that the brush 203 may be moved in one direction along the protective glass 105 instead of reciprocating to end the rotation operation.

  In the vibration operation, the CPU 260 generates a vibration signal for causing the vibration operation. The vibration signal may be a sinusoidal signal or a signal with other signal amplitudes repeated. The CPU 260 sends a vibration signal to the motor driver 170. The motor driver 170 controls the driving force of the BIS motor 180 based on the vibration signal from the CPU 260 so that the position x of the image sensor 104 repeatedly moves along the direction perpendicular to the optical axis Oc. The movable part A2 vibrates according to the driving force of the BIS motor 180. In this case, the protective glass 105 of the image sensor 104 mounted on the movable part A2 vibrates in at least one of the vertical direction and the depth direction in FIG. The surveillance camera 200 can increase the wiping effect of the brush 203 when it is vibrated in the vertical direction, and can wipe the gap of the brush 203 without omission when it is vibrated in the depth direction.

  The surveillance camera 200 can float the dust adhering to the protective glass 105 from the protective glass 105 and drop it by gravity by the vibration operation of the movable part A2. Note that the higher the frequency of the vibration signal, the higher the vibration speed of the image sensor 104 and the protective glass 105, and the more likely the dust falls.

  In the rotation operation, the CPU 260 generates a rotation instruction signal for reciprocating the brush 203 and sends it to a drive source (for example, a filter motor 207) for driving the brush 203. The drive source reciprocates the brush 203 along the protective glass 105 based on the rotation instruction signal. Thereby, the brush 203 can wipe off the dust adhering to the protective glass 105.

Next, the movement of the BIS mechanism unit 110 by the ABF mechanism 250 will be described.
9A, 9B, and 9C are schematic side views showing an example of movement of the BIS mechanism unit 110 by the ABF mechanism 250. FIG.

  The ABF mechanism 250 moves the BIS mechanism unit 110 along the optical axis Oc by adjusting the pressing force of the shaft 251a and the elastic force of the ABF preload spring 253.

  In the ABF mechanism 250, when the BIS mechanism unit 110 is moved forward most toward the lens unit 130, the brush 203 and the protective glass 105 come into contact with each other (see FIG. 9A). Thereby, the brush 203 can wipe the protective glass 215 by rotating. In addition, you may provide the contact position where the brush 203 and the protective glass 105 contact in several steps along the optical axis Oc. Thereby, the monitoring camera 200 can adjust the pressing force with respect to the protective glass 105 when the protective glass 105 is wiped with the brush 203.

  CPU 260 permits ABF mechanism 250 to move BIS mechanism unit 110 to the contact position when surveillance camera 200 performs a cleaning operation (for example, when the cleaning mode is set). On the other hand, the CPU 260 prohibits the ABF mechanism 250 from moving the BIS mechanism unit 110 to the contact position when the monitoring camera 200 does not perform the cleaning operation. That is, the protective glass 105 and the brush 203 come into contact only during the cleaning operation. Therefore, the movement range of the BIS mechanism unit 110 along the direction of the optical axis Oc differs between when the cleaning operation is performed and when the cleaning operation is not performed. In other words, the arrangement position along the optical axis Oc when the BIS mechanism unit 110 is closest to the lens unit 130 side is different.

  When the ABF mechanism 250 does not perform a cleaning operation (for example, when the imaging mode is set), even if the BIS mechanism unit 110 is closest to the lens unit 130 side, the BIS mechanism unit 110 is slightly behind the contact position. It is located at the contact position (see FIG. 9B). Therefore, the brush 203 and the protective glass 105 are not in contact with each other during a period when the cleaning operation is not performed. Therefore, the monitoring camera 200 can avoid contact with the brush 203 when not needed, and can suppress damage to the protective glass 105.

  When the ABF mechanism 250 moves the BIS mechanism unit 110 backward in the direction opposite to the lens unit 130 side, the positional relationship shown in FIG. 9C is obtained. As described above, when performing the cleaning operation, the BIS mechanism unit 110 can be moved between the position of the BIS mechanism unit 110 shown in FIG. 9A and the position of the BIS mechanism unit 110 shown in FIG. 9C by adjusting the position by the ABF mechanism 250. It is. When the cleaning operation is not performed, the BIS mechanism unit 110 can be moved between the position of the BIS mechanism unit 110 shown in FIG. 9B and the position of the BIS mechanism unit 110 shown in FIG. 9C by position adjustment by the ABF mechanism 250.

  FIG. 10 is an exploded perspective view for explaining the internal configuration of the monitoring camera 200 related to the interlocking operation of the brush 203 and the optical filter 204.

  A lens unit 130 is attached to the front side of the camera housing 25 or the camera housing 33. In the camera housing 25 or the camera housing 33, a BIS mechanism unit 110 including the image sensor 104 disposed on the optical axis Oc and an ABF mechanism 250 in which the BIS mechanism unit 110 is disposed inside are provided. ing.

  A base frame 221 is provided on the front side of the ABF mechanism 250. A filter frame 222 to which the optical filter 204 is attached and a link member 223 to which the brush 203 is attached are attached to the base frame 221.

  An opening window 224 is provided at the center of the base frame 221. A filter frame 222 is attached to the opening window 224 so as to be slidable in a direction perpendicular to the optical axis Oc (for example, the vertical direction in FIG. 10) (see FIGS. 11 to 13). It can be said that the filter frame 222 is guided by the opening window 224 so as to be slidable in a direction perpendicular to the optical axis Oc. The base frame 221 is provided with a filter motor 207 that generates a driving force for sliding the filter frame 222, and a rotation pin 225 to which the rotational driving force of the filter motor 207 is transmitted.

  The filter frame 222 is provided with two upper and lower filter mounting holes 226. In each filter mounting hole 226, a color filter 205 and a monochrome filter 206 are respectively mounted. Further, a projecting piece 28 with a connecting pin 227 standing is provided on the side of the filter frame 222.

  A brush 203 is attached to the distal end portion of the link member 223. A fixing hole 229 to which the rotation pin 225 is fixed is provided at the root end portion of the link member 223. An elongated hole 230 into which the connecting pin 227 is slidably inserted is provided at an intermediate portion of the link member 223 (intermediate portion between the distal end portion and the root end portion). The link member 223 can be rotated about the rotation pin 225 by the rotation driving force transmitted from the filter motor 207 via the rotation pin 225.

  In this way, the filter frame 222 and the brush 203 are connected to each other by the link member 223 (see FIGS. 11 to 13). The position at which the brush 203 is attached (the tip of the link member 223) is closer to the position of the rotation pin 225 (the link member 223 than the position to which the filter frame 222 is connected (the middle part of the link member 223)). It is located away from the root end.

  FIG. 11 is a diagram illustrating an arrangement example of the optical filter 204 and the brush 203 when the operation mode is set to the monochrome mode. FIG. 12 is a diagram illustrating an arrangement example of the optical filter 204 and the brush 203 when the operation mode is set to the cleaning mode. FIG. 13 is a diagram illustrating an arrangement example of the optical filter 204 and the brush 203 when the operation mode is set to the color mode. In any of FIGS. 11 to 13, the front side (the lens unit 130 side) is viewed from the image sensor 104.

  FIG. 14A is a side view showing an arrangement example of the image sensor 104, the protective glass 105, the brush 203, and the optical filter 204 when the monochrome mode is set. FIG. 14B is a side view illustrating an arrangement example of the image sensor 104, the protective glass 105, the brush 203, and the optical filter 204 when the cleaning mode is set. FIG. 14C is a side view illustrating an arrangement example of the image sensor 104, the protective glass 105, the brush 203, and the optical filter 204 when the color mode is set.

  In the black and white mode, as shown in FIGS. 11 and 14A, the filter motor 207 is controlled by the CPU 260, and the optical filter 204 and the brush 203 move upward in conjunction with each other.

  In FIG. 11, the link member 223 rotates counterclockwise, and the optical filter 204 and the brush 203 move upward. In this case, the filter frame 222 is guided so as to move upward along the opening window 224 of the base frame 221. Further, the connecting pin 227 of the filter frame 222 slides inside the elongated hole 230 of the link member 223 toward the distal end side (upper right side in FIG. 11).

  In this manner, the black and white filter 206 is disposed at a position on the optical path to the image sensor 104 (an insertion position inserted on the optical path). On the other hand, the color filter 205 is not disposed on the optical path to the image sensor 104. That is, the color filter 205 is disposed at a position that is not on the optical path to the image sensor 104 (an exit position that exits from the optical path). Further, the brush 203 is disposed at a position on the front side of the protective glass 105 (a retreat position retracted to the front side). In this case, the brush 203 and the front surface of the protective glass 105 are not in contact with each other. The central axis of the optical path is the optical axis Oc. Further, the retracted position is a non-contact position.

  In the cleaning mode, as shown in FIGS. 12 and 14B, the filter motor 207 is controlled via the CPU 260, and the optical filter 204 and the brush 203 are arranged at the center on the optical path. That is, the center of the optical filter 204 and the center of the brush 203 are arranged on the optical axis Oc.

  When the operation mode is set to the cleaning mode after being set to the black and white mode, the optical filter 204 and the brush 203 move downward in conjunction with each other and are arranged at the center on the optical path. In this case, the link member 223 rotates clockwise, and the optical filter 204 and the brush 203 move downward. In this case, the filter frame 222 is guided so as to move downward along the opening window 224 of the base frame 221. Further, the connecting pin 227 of the filter frame 222 slides inside the elongated hole 230 of the link member 223 to the root end side (left side in FIG. 12).

  When the operation mode is set to the color mode and then set to the cleaning mode, the optical filter 204 and the brush 203 move upward in conjunction with each other and are arranged at the center on the optical path. In this case, the link member 223 rotates counterclockwise, and the optical filter 204 and the brush 203 move upward. In this case, the filter frame 222 is guided so as to move upward along the opening window 224 of the base frame 221. Further, the connecting pin 227 of the filter frame 222 slides inside the elongated hole 230 of the link member 223 to the root end side (left side in FIG. 12).

  In this way, when the cleaning mode is set, the brush 203 is disposed on the front side of the protective glass 105.

  In the color mode, as shown in FIGS. 13 and 14C, the filter motor 207 is controlled by the CPU 260, and the optical filter 204 and the brush 203 move downward in conjunction with each other.

  In FIG. 13, the link member 223 rotates clockwise, and the optical filter 204 and the brush 203 move downward. In this case, the filter frame 222 is guided so as to move downward along the opening window 224 of the base frame 221. Further, the connecting pin 227 of the filter frame 222 slides inside the elongated hole 230 of the link member 223 toward the tip side (upper right side in FIG. 13).

  In this way, the color filter 205 is disposed at the insertion position on the optical path to the image sensor 104. On the other hand, the black and white filter 206 is not arranged at the insertion position on the optical path to the image sensor 104. In other words, the black and white filter 206 is disposed at the exit position that exits from the optical path to the image sensor 104. Further, the brush 203 is disposed at a retracted position where it is retracted to the front side of the protective glass 105. In this case, the brush 203 and the protective glass 105 are not in contact with each other.

  Further, in the cleaning mode, the brush 203 is disposed on the front side of the protective glass 105 and reciprocates a plurality of times so as to wipe the front surface of the protective glass 105. In this reciprocating operation, the brush 203 moves in the vertical direction along the protective glass 105 in the same manner as when switching between the color filter 205 and the black and white filter 206. In the reciprocating operation for wiping the protective glass 105, the brush 203 may move within a range where at least a part of the brush 203 is in contact with the protective glass 105. Further, the movement amount of the brush 203 in the cleaning mode may be smaller than the rotation operation of the brush 203 in the monochrome mode or the color mode. The filter motor 207 supplies a driving force for reciprocation for the brush 203 to wipe the protective glass 105 to the link member 223. When the link member 223 rotates according to the driving force from the filter motor 207, the brush 203 rotates to realize a reciprocating motion.

  Note that the number of reciprocating movements of the brush 203 may be arbitrary. For example, the number of reciprocating movements of the brush 203 may be stored in the memory M1 in advance, or may be designated by the user via the operation unit 270 or the communication unit 280. Further, when the CPU 260 has a large amount of dirt (for example, a large amount of dust is attached) according to the degree of dirt on the protective glass 105, the number of reciprocations is increased, and the amount of dirt is small (for example, a small amount of dust is attached). The number of reciprocating movements may be reduced.

  Next, the positional relationship between the protective glass 105 and the brush 203 in the cleaning operation will be described.

  In the photographing mode (monochrome mode or color mode), the brush 203 is disposed at a retracted position retracted from the front side of the protective glass 105. When the operation mode of the monitoring camera 200 is set to the cleaning mode, the ABF mechanism 250 moves the BIS mechanism unit 210 forward, and the brush 203 and the protective glass 105 come into contact with each other. Specifically, the CPU 260 drives the ABF motor 251, advances the BIS mechanism unit 110, and moves the protective glass 105 to the front side.

  In this way, the protective glass 105 and the brush 203 are arranged at the contact positions (see FIG. 9A). In a state where the protective glass 105 and the brush 203 are in contact with each other, the CPU 260 drives the filter motor 207 to reciprocate the brush 203 together with the optical filter 204 in the vertical direction. In this way, the monitoring camera 200 can wipe the protective glass 105 and clean it.

  When the CPU 260 drives the ABF motor 251 to move the ABF mechanism 250 backward, the protective glass 105 and the brush 203 are disposed at positions where they do not contact each other (non-contact position, retracted position) (see, for example, FIG. 9B). The brush 203 may move to the center on the optical path in a state where the protective glass 105 and the brush 203 are not in contact with each other.

  Further, the CPU 260 may advance the BIS mechanism unit 110 and place the protective glass 105 and the brush 203 at the contact position when the brush 203 moves downward (moves forward) in the cleaning operation. On the other hand, when the brush 203 moves upward (returns), the CPU 260 moves the BIS mechanism unit 110 backward to bring the protective glass 105 and the brush 203 into a non-contact position (for example, the position shown in FIG. 9B). May be arranged.

  Thereby, it can suppress that the dust wiped off from the protective glass 105 at the time of forward movement adheres again to the protective glass 105 at the time of backward movement. Further, by rotating the brush 203 downward during the forward movement, it is possible to suppress the dust from being attached to the protective glass 105 again when dust is dropped from the downward rotation tip position.

Next, an operation example during the cleaning operation of the monitoring camera 200 will be described.
FIG. 15 is a flowchart illustrating an operation example of the monitoring camera 200 during the cleaning operation.

  First, the CPU 260 determines whether or not it is time to clean the protective glass 105 (S11). For example, when the CPU 260 determines that the protective glass is dirty, when the current time is in a predetermined time zone, when the CPU 260 receives an operation for instructing cleaning via the operation unit 270, If an instruction signal for instructing the cleaning operation is received, it may be determined that it is time to perform cleaning.

  If it is determined that it is time to clean, the CPU 260 drives the ABF motor 251 to advance the BIS mechanism unit 110 so that the protective glass 105 and the brush 203 are in contact with each other (S12). The CPU 260 drives the filter motor 207, moves the brush 203 in the vertical direction, and moves it to the center of the optical path (S13).

  The CPU 260 controls to perform the vibration operation of the movable part A2 (S14). In this case, the CPU 260 may generate a vibration signal and send it to the motor driver 170. The motor driver 170 may drive the BIS motor 180 to repeatedly move and vibrate the movable part A2 including the image sensor 104 and the protective glass 105 along the direction perpendicular to the optical axis Oc based on the vibration signal.

  The CPU 260 controls the brush 203 to rotate (S15). In this case, the CPU 260 may drive the filter motor 207 to reciprocate the brush 203 in the vertical direction in conjunction with the movement of the optical filter 204 and wipe the protective glass along the front surface of the protective glass 105.

  When the cleaning operation ends, the CPU 260 causes the image sensor 104 to image a predetermined white reference. For example, a white portion (for example, a white sheet) for white balance adjustment is provided as an example of a predetermined white reference together with the brush 203 at the distal end portion of the link member 223, and the CPU 260 moves the brush 203 to the center of the optical path to move the white portion. Let's take an image. The DSP 190 acquires a captured image captured by the image sensor 104. The DSP 190 adjusts the white balance based on the white reference captured image (S16).

  In S12, the CPU 260 drives the ABF motor 251, stops it at a position before the protective glass 105 and the brush 203 come into contact with each other, and then drives the filter motor 207 to bring the brush 203 to the center on the optical path. After the movement, the ABF motor 251 may be driven to bring the protective glass 105 and the brush 203 into contact with each other.

  In S15, the CPU 260 may switch between contact and non-contact between the protective glass 105 and the brush 203 between forward movement and backward movement. Specifically, the CPU 260 may drive the ABF motor 251 to bring the protective glass 105 and the brush 203 into contact with each other and place them at the contact positions. In this state, the CPU 260 may drive the filter motor 207 to move the brush 203 forward in one direction (for example, downward). Subsequently, the CPU 260 may drive the ABF motor 251 to separate the protective glass 105 and the brush 203 from each other and dispose them at a non-contact position. In this state, the CPU 260 may drive the filter motor 207 to return the brush 203 to the original direction (for example, upward).

  Note that the order of the processes of S13 and S14 may be reversed. Also, the processes of S14 and S15 may be reversed in order, or one of them may be operated.

  As described above, according to the monitoring camera 200, even if the mass of the dust adhering to the protective glass 105 is small and the inertial force acting on the dust is small. By wiping the protective glass 105 with 203, the possibility that dust with a small mass can be removed can be increased.

  In addition, by vibrating the BIS mechanism unit 110, it is possible to increase the possibility that dust attached to the vicinity of corners (for example, four corners) of the protective glass 105 that cannot be reached by the rotation of the brush 203 can be dropped and removed. Moreover, even if dust remains after the wiping operation by the brush 203, the adhesion force to the protective glass 105 may be reduced by the wiping operation. Further, since the generation of static electricity can be suppressed by the material of the brush 203, the monitoring camera 200 can be more likely to be removed by the vibration of the BIS mechanism unit 110.

  Therefore, the surveillance camera 200 can improve the dust removal performance by the wiping operation of the protective glass 105 by the brush 203 and the vibration operation of the BIS mechanism unit 110. Therefore, even if the resolution of the monitoring camera 200 is high and the number of pixels of the image sensor 104 is large, the monitoring camera 200 can suppress small dust from being reflected in the image.

  Further, by forming the material of the brush 203 from wool, nylon, silk, or the like, it is possible to make it difficult to be charged between the brush 203 and the protective glass 105 that is in contact during cleaning. Therefore, static electricity is hardly generated when the brush 203 and the protective glass 105 are in contact with each other. Therefore, when the brush 203 wipes the protective glass 105, it can suppress that it becomes difficult to remove dust by static electricity.

  Further, when removing dust attached to the protective glass 105, it is not necessary to remove the lens 131. Therefore, the monitoring camera 200 can clean the protective glass 105 without disassembling the monitoring camera 200, and the cleaning operation of the protective glass 105 becomes easy.

  In the monitoring camera 200, the brush 203 and the optical filter 204 may be interlocked by the link member 223. Accordingly, the monitoring camera 200 can share the drive motor for moving (turning) the brush 203 for the wiping operation and the drive motor for moving the optical filter 204 by the filter motor 207. Therefore, the monitoring camera 200 does not require a separate drive motor for the brush 203 to turn for wiping, and the monitoring camera 200 can be reduced in size and the product cost can be reduced.

  Further, in the link member 223, the connection position of the brush 203 (the end portion of the link member 223) is farther from the rotation center of the link member 223 than the connection position of the optical filter 204 (intermediate portion of the link member 223). (Position on the tip side). Therefore, the movement amount of the brush 203 is larger than the movement amount of the optical filter 204. Thus, when the optical filter 204 is moved from a position outside the optical path to a position on the optical path, the brush 203 can be reliably moved from a position on the optical path to a position outside the optical path.

  Further, in the monitoring camera 200, when the brush 203 is moved to a position on the optical path, the brush 203 and the protective glass 105 may be disposed at a non-contact position. Thereby, the surveillance camera 200 can suppress the brush 203 from interfering with the protective glass 105. Thereafter, by arranging the brush 203 and the protective glass 105 at the contact position, the surveillance camera 200 can perform cleaning operation by wiping the protective glass 105.

  In addition, the monitoring camera 200 can move the BIS mechanism unit 110 along the optical axis Oc using the ABF motor 251. Therefore, the monitoring camera 200 does not need to be provided with a separate drive source for changing the relative positions of the protective glass 105 and the brush 203, and the monitoring camera 200 can be reduced in size and the product cost can be reduced.

  Further, the surveillance camera 200 includes the ABF mechanism 250 outside the lens unit 130, so that both the shake correction and the back focus adjustment can be performed even when the lens unit 130 does not have the ABF function. Therefore, even when the lens 131 can be replaced, shake correction and back focus adjustment can be performed.

  Further, the monitoring camera 200 may wipe the protective glass 105 only when the brush 203 moves forward (moves from one side to the other). Thereby, the surveillance camera 200 can collect the dust wiped off from the protective glass 105 at the other end and drop it, for example.

  In addition, the monitoring camera 200 controls the cleaning timing and can be cleaned at an appropriate timing. Thereby, the surveillance camera 200 can suppress excessive cleaning, and can extend the durable life of the brush 203 and the protective filter.

  As described above, the monitoring camera 200 includes the image sensor 104 that images the subject B1, and the lens unit 130 that includes the lens 131 that forms an image of the subject B1 on the light receiving surface of the image sensor 104. The surveillance camera 200 has a movable part A2 that holds the image sensor 104, and in accordance with the shaking of the surveillance camera 200, moves the movable part A2 in a direction perpendicular to the optical axis Oc of the lens unit 130 to correct the shaking. A mechanism unit 110 is provided. The monitoring camera 200 supplies a vibration signal for repeatedly moving the movable part A2 in a direction perpendicular to the optical axis Oc of the lens part 130 to the BIS mechanism unit 110, and a motor driver 170 that vibrates the movable part A2 according to the vibration signal. Prepare. The monitoring camera 200 includes a brush 203 that moves along the protective glass 105 positioned in front of the image sensor 104 and wipes the protective glass 105. The surveillance camera 200 is an example of a camera device. The BIS mechanism unit 110 is an example of a shake correction unit. The motor driver 170 is an example of a driver. The protective glass 105 is an example of a translucent member. The brush 203 is an example of a wiper.

  Thereby, when the BIS mechanism unit 110 is vibrated, the monitoring camera 200 can wipe the dust with the brush 203 even if the inertial force acting on the dust is small and the dust is not sufficiently removed. Moreover, even if the dust is not sufficiently removed by the vibration of the BIS mechanism unit 110 due to the generation of static electricity between the protective glass 105 and the dust, the monitoring camera 200 can wipe the dust with the brush 203. Even if dust adheres to the corners (for example, the four corners) of the protective glass 105 that cannot be reached by the rotation of the brush 203, the surveillance camera 200 drops and removes the dust due to the vibration of the BIS mechanism unit 110. Easy to do. Therefore, the monitoring camera 200 can suppress the appearance of small dust in the image even when the monitoring camera 200 has a high resolution and the number of pixels of the image sensor 104 is large.

  The monitoring camera 200 may include an ABF mechanism 250 that adjusts the focus of the lens unit 130. The ABF mechanism 250 may move the BIS mechanism unit 110 to a position where the protective glass 105 contacts the brush 203 along the optical axis Oc of the lens unit 130. The ABF mechanism 250 is an example of a focus adjustment unit.

  Accordingly, the monitoring camera 200 can move the BIS mechanism unit 110 using the ABF mechanism 250, and can contact the protective glass 105 on the front side of the image sensor 104 included in the BIS mechanism unit 110 with the brush 203. Therefore, the surveillance camera 200 having the focus adjustment function does not need to include a dedicated component for moving the BIS mechanism unit 110.

  The monitoring camera 200 may include a CPU 260 that sets an operation mode of the monitoring camera 200. The operation mode may include an imaging mode for imaging the subject B1 and a cleaning mode for cleaning the protective glass 105. The ABF mechanism 250 may make the position of the BIS mechanism unit 110 when the cleaning mode is set closer to the brush 203 than the position of the BIS mechanism unit when the imaging mode is set. The CPU 260 is an example of a first processor.

  As a result, the surveillance camera 200 can move the protective glass 105 closer to the brush 203 during cleaning by moving the BIS mechanism unit 110 used for imaging in a wider range than during imaging. Therefore, the monitoring camera 200 does not contact the protective glass 105 and the brush 203 at the time of imaging, and can maintain the image quality of the captured image. The monitoring camera 200 can suitably remove dust adhering to the protective glass 105 in contact with the vibration of the BIS mechanism unit 110 when the protective glass 105 and the brush 203 come into contact with each other during cleaning. Further, the brush 203 comes into contact with the protective glass 105 only at the time of cleaning, and it is possible to prevent the protective glass 105 from being frequently wiped and generating scratches.

  The brush 203 may be formed including wool, nylon, or silk.

  Wool, nylon, and silk are materials that tend to be positive in the triboelectric train. Further, the glass forming the protective glass 105 is also a material that easily becomes a positive electrode in the triboelectric train. Accordingly, since the distance between the frictional charge trains of the two in contact with each other is short, static electricity due to these contacts is unlikely to occur. Therefore, even if the brush 203 contacts and wipes the protective glass 105, static electricity is hardly generated. Therefore, the adhesion of dust due to static electricity is suppressed, and the dust is easily dropped by the vibration of the BIS mechanism unit 110. Therefore, the monitoring camera 200 can improve the cleaning performance.

  The monitoring camera 200 may include an optical filter 204 disposed in front of the image sensor 104 and a filter motor 207 that supplies a driving force to the optical filter 204. The optical filter 204 may move along a direction perpendicular to the optical axis Oc according to the driving force of the filter motor 207. The brush 203 moves along the front surface of the image sensor in conjunction with the optical filter through a long hole 230 connected to the optical filter 204. The long hole 230 is an example of a connecting portion.

  As a result, the monitoring camera 200 can share a drive source for moving the brush 203 and a drive source for moving the optical filter 204, and it is not necessary to specially prepare a drive source dedicated to the wiper.

  The CPU 260 may determine whether or not the protective glass 105 is dirty. When the protective glass 105 is dirty, the CPU 260 may supply a vibration signal to the BIS mechanism unit 110 and wipe it with the brush 203. The CPU 260 is an example of a second processor.

  Thus, when dust or the like adheres to the protective glass 105 that particularly needs cleaning, cleaning can be performed by both the vibration operation of the BIS mechanism unit 110 and the rotation operation of the brush 203. Thereby, the surveillance camera 200 can remove the dust adhering to the protective glass 105 and can improve the image quality of the captured image.

  The CPU 260 may keep time. The CPU 260 may supply the vibration signal to the BIS mechanism unit 110 and wipe it with the brush 203 when the measured time is included in the predetermined time zone.

  Thereby, the monitoring camera 200 can be cleaned by both the vibration operation of the BIS mechanism unit 110 and the rotation operation of the brush 203 in a time zone suitable for cleaning. For example, the monitoring camera 200 may select and clean a time zone in which the need for imaging is low. Thereby, the cleaning performance can be improved while taking into consideration the imaging by the monitoring camera 200.

  The monitoring camera 200 may include an operation unit 270 that instructs cleaning of the protective glass 105. When cleaning is instructed via the operation unit 270, the CPU 260 may supply a vibration signal to the BIS mechanism unit 110 and wipe it with the brush 203.

  Accordingly, the monitoring camera 200 can be cleaned by both the vibration operation of the BIS mechanism unit 110 and the rotation operation of the brush 203 at a timing desired by the user.

  The monitoring camera 200 may include a communication unit that receives an instruction signal instructing cleaning of the protective glass 105. When the instruction signal is received, the CPU 260 may supply the vibration signal to the BIS mechanism unit 110 and wipe it with the brush 203. The communication unit 280 is an example of a receiving unit.

  Thereby, even if the monitoring camera 200 is arranged at a remote location away from the user's location value, the vibration operation of the BIS mechanism unit 110 and the rotation operation of the brush 203 are performed according to the remote operation using communication. It can be cleaned by both.

(Other embodiments)
As described above, the first embodiment has been described as an example of the technique in the present disclosure. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments in which changes, replacements, additions, omissions, and the like are performed.

  In the above embodiment, the case where the cleaning member is the brush 203 is exemplified, but the present invention is not limited to this. For example, a brush 203 having a shape other than the shape described above may be provided, or the shape of the link member 223 may be devised.

  In the embodiment, in the monitoring camera 200, the brush 203 moves forward when the brush 203 and the protective glass 105 are in the contact position, and the brush 203 moves backward when the brush 203 and the protective glass 105 are in the non-contact position. However, the present invention is not limited to this. For example, when the brush 203 and the protective glass 105 are in the contact position, the brush 203 may perform both reciprocating movements.

  In the above embodiment, the BIS mechanism unit 110 is moved in the front-rear direction by using the ABF mechanism 250 and the brush 203 and the protective glass 105 are brought into contact with each other. However, the present invention is not limited to this. For example, a driving source (not shown) may move the brush 203 in the front-rear direction to bring the brush 203 and the protective glass 105 into contact with each other. Further, a drive source other than the filter motor 207 may be provided as a drive source for the rotation operation of the brush 203.

  In the said embodiment, it illustrated that the brush 203 moved to one direction (up-down direction in FIGS. 11-13) perpendicular | vertical to the optical axis Oc. However, the present invention is not limited to this, and the brush 203 may move in another direction perpendicular to the optical axis Oc (the left-right direction in FIGS. 11 to 13) and wipe the protective glass 105.

  In the above embodiment, the protective glass 105 is illustrated as an example of the translucent member. However, a translucent member other than glass may be used as a protective cover for the light receiving surface of the image sensor 104.

  In the above embodiment, the BIS mechanism unit 110 is illustrated as an example of the shake correction unit that performs the shake correction. However, the shake correction unit may be provided with a configuration other than the BIS mechanism unit 110.

  In the above embodiment, the operation mode (cleaning mode, imaging mode, etc.) of the surveillance camera is not set, and the operation mode need not be particularly conscious. Therefore, for example, items in the cleaning mode described in the above embodiment may be applied as items in the cleaning operation. For example, the items in the imaging mode described in the above embodiment may be applied as items in the imaging operation.

  In the above embodiment, the processor may be physically configured in any manner. Further, if a programmable processor is used, the processing contents can be changed by changing the program, so that the degree of freedom in designing the processor can be increased. The processor may be composed of one semiconductor chip or physically composed of a plurality of semiconductor chips. When configured by a plurality of semiconductor chips, each control of the above embodiment may be realized by a separate semiconductor chip. In this case, it can be considered that a plurality of semiconductor chips constitute one processor. Further, the processor may be configured by a member (a capacitor or the like) having a function different from that of the semiconductor chip. Further, one semiconductor chip may be configured so as to realize the functions of the processor and other functions. In addition, a plurality of processors may be configured by one processor.

  The present disclosure is useful for a camera device that can improve the performance of removing dust attached to the front surface of an image sensor included in a camera device having a shake correction unit.

100 shake correction mechanism 102 substrate 104 image sensor 105 protective glass 106 sensor substrate 110 BIS mechanism unit 130 lens unit 131 lens 135 lens mount base 140 gyro sensor 141 integrator 142 amplifier 143 data converter 150 position sensor 151 hall element 152 magnet 153 hall Element amplifier 160 Comparator 170 Motor driver 180 BIS motor 181 Coil 182 Magnet 190 DSP
200, 200A, 200B Monitoring camera 203 Brush 204 Optical filter 205 Color filter 206 Black and white filter 207 Filter motor 221 Base frame 222 Filter frame 223 Link member 230 Slot 250 250 ABF mechanism 251 ABF motor 252 Slide guide pin 253 ABF preload spring 260 CPU
270 Operation unit 280 Communication unit A1 Fixed unit A2 Movable unit B1 Subject Oc Optical axis M1 Memory

Claims (10)

A camera device,
An image sensor for imaging a subject;
A lens unit having a lens that forms an image of the subject on a light receiving surface of the image sensor;
A shake correction unit that has a movable part that holds the image sensor and corrects the shake by moving the movable part in a direction perpendicular to the optical axis of the lens unit according to the shake of the camera device;
A driver for supplying a vibration signal for repeatedly moving the movable part in a direction perpendicular to the optical axis of the lens part to the vibration correction part, and for vibrating the movable part according to the vibration signal;
A wiper that moves along the translucent member located in the front stage of the image sensor and wipes the translucent member;
Camera device. A focus adjustment unit for adjusting the focus of the lens unit;
The focus adjustment unit moves the shake correction unit to a position where the translucent member contacts the wiper along the optical axis of the lens unit.
The camera device according to claim 1. A first processor for setting an operation mode of the camera device;
The operation mode includes an imaging mode for imaging the subject, and a cleaning mode for cleaning the front surface of the image sensor,
The focus adjustment unit causes the position of the shake correction unit when set to the cleaning mode to be closer to the wiper than the position of the shake correction unit when set to the imaging mode;
The camera device according to claim 2. The translucent member is formed of glass,
The wiper is formed of wool, nylon, or silk,
The camera device according to claim 1. An optical filter disposed in front of the image sensor;
A filter motor for supplying a driving force to the optical filter,
The optical filter moves along a direction perpendicular to the optical axis according to the driving force of the filter motor,
The wiper moves along the translucent member in conjunction with the optical filter via a connecting portion connected to the optical filter.
The camera apparatus of any one of Claims 1-4. A second processor for determining whether or not the translucent member is dirty;
The second processor supplies the vibration signal to the shake correction unit when the translucent member is dirty, and wipes the wiper.
The camera apparatus of any one of Claims 1-5. A second processor for measuring time,
The second processor, when the time is included in a predetermined time zone, supplies the vibration signal to the shake correction unit, wipe the wiper,
The camera apparatus of any one of Claims 1-5. An operation unit for instructing cleaning of the translucent member;
A second processor for supplying the vibration signal to the shake correction unit and wiping the wiper when the cleaning is instructed via the operation unit;
The camera apparatus of any one of Claims 1-5. A receiving unit that receives an instruction signal for instructing cleaning of the light receiving surface of the image sensor or the translucent member;
A second processor for supplying the vibration signal to the shake correction unit and wiping the wiper when the instruction signal is received by the receiving unit;
The camera apparatus of any one of Claims 1-5. A movable unit that holds the image sensor, and moves the movable unit in a direction perpendicular to the optical axis of the lens unit that forms an image of a subject on the light receiving surface of the image sensor in response to shaking of the camera device; A cleaning method in the camera device, comprising a shake correction unit for correcting shake,
A vibration signal for repeatedly moving the movable unit in a direction perpendicular to the optical axis of the lens unit that forms an image of a subject on the light receiving surface of the image sensor is supplied to the vibration correction unit, and the vibration signal is transmitted according to the vibration signal. Vibrate the moving parts,
Moving the wiper along the translucent member located in the front stage of the image sensor, and wiping the translucent member;
Cleaning method.

Images