JP2023085110A - Imaging apparatus - Google Patents

Abstract

To cool an imaging element sufficiently by an airflow from a fan and to prevent the adhesion of fine particles in the airflow to an imaging surface.SOLUTION: An imaging apparatus 100 has an imaging element 115 including an optical member 115d in front of an imaging surface. The imaging apparatus has a fan 130 inside the same that generates an airflow in one direction along a rear surface on the opposite side of the imaging element from the imaging surface and a first dividing member 201 that is provided downstream of the imaging element in the one direction and that divides an inner space of the imaging apparatus into a first space A in which the optical member and imaging surface are arranged and a second space B in which the fan is arranged and the air flows. A portion 201a1 of a first dividing member that divides the first space and the second space in an imaging optical axis direction is located on a back side of a foremost surface of the optical member and on a front side of a back surface of the imaging element.SELECTED DRAWING: Figure 3

Description

The present invention relates to an imaging device having an internal cooling fan.

Imaging devices such as digital still cameras and video cameras are equipped with imaging elements such as CMOS sensors and CCD sensors for imaging subject images, and electronic elements such as CPUs and ICs mounted on circuit boards. They generate heat. If the temperature of the imaging element or the electronic element rises excessively, there is a risk that the performance of these elements will be degraded or malfunction will occur, making it impossible to obtain a good image. Japanese Unexamined Patent Application Publication Nos. 2004-100001 and 2003-200010 disclose an image pickup device that forcibly cools an image pickup element by an air flow from a fan arranged inside.

Japanese Patent Application Laid-Open No. 2021-34791 Japanese Patent No. 5631116

However, in the image pickup apparatus of Patent Document 1, although the board on which the electronic element that generates heat is mounted is thermally connected to the duct that is the air flow path from the fan, the image pickup element is thermally connected to the board. The connection is weak and the image sensor is cooled less efficiently. Further, the image pickup apparatus of Patent Document 2 has an image blur correction function that moves the image pickup element in a direction perpendicular to the optical axis. , the moving direction of the imaging element is restricted.

On the other hand, when a fan is arranged in the imaging device, it is also necessary to control the airflow so that fine particles (dust) floating on the airflow from the fan do not adhere to the imaging surface of the imaging element.

SUMMARY OF THE INVENTION The present invention provides an imaging apparatus capable of sufficiently cooling an imaging element with an airflow from a fan and suppressing adhesion of fine particles to an imaging surface.

An imaging device as one aspect of the present invention has an imaging element having an optical member in front of an imaging surface. The imaging device includes a fan for generating an air flow in one direction along the rear surface of the imaging device opposite to the imaging surface of the imaging device, and a downstream side of the imaging device in the one direction, It has a first dividing member that divides the internal space of the imaging device into a first space in which the optical member and the imaging surface are arranged and a second space in which a fan is arranged and air flows. A portion of the first dividing member that divides the first space and the second space in the imaging optical axis direction is positioned rearward of the frontmost surface of the optical member and forward of the rear surface of the image sensor.

According to the present invention, the image pickup device can be sufficiently cooled by the airflow from the fan, and adhesion of fine particles contained in the airflow to the optical member and the imaging surface can be suppressed.

2 is an exploded perspective view of the digital camera of Embodiment 1. FIG. 2 is an exploded perspective view of the essential parts of the digital camera of Embodiment 1. FIG. Sectional drawing of the said principal part. The exploded perspective view of the said principal part. FIG. 2 is a cross-sectional view of a digital camera of Example 2; 2 is a block diagram showing the internal configuration of the digital camera of Example 1. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 6 shows the configuration of a digital camera (hereinafter simply referred to as a camera) 100 as an imaging device that is Embodiment 1 of the present invention. A lens unit 500 including a lens 501 is detachably (exchangeably) attached to the camera 100 . Although only one lens 501 is shown in the drawing for simplification, a plurality of lenses are actually provided.

In the camera 100, the shutter 410 is a focal plane shutter that controls the exposure time of the imaging element 115, which will be described later, and its operation is controlled by the camera control section 420, which will be described later. The imaging element 115 is composed of a CCD sensor or a CMOS sensor, photoelectrically converts (pictures) a subject image (optical image) formed by light passing through the lens 501, and outputs an imaging signal (analog signal). The A/D converter 412 converts the analog imaging signal output from the imaging element 115 into a digital imaging signal. The digital imaging signal is written into the memory 421 via the image processing section 413 and a memory control section 422 (to be described later) or only via the memory control section 422 .

The image processing unit 413 performs image processing such as pixel interpolation processing, resizing processing, and color conversion processing on the digital imaging signal from the A/D converter 412 or the memory control unit 422 to generate image data. Further, the image processing unit 413 also performs auto white balance processing based on the result of calculation using image data.

The camera control unit 420 is configured by a computer including a processor such as a CPU and circuits, and controls the entire camera 100 and imaging lens 500 by executing programs recorded in the nonvolatile memory 423 . For example, the camera control unit 420 controls the image pickup device 115 and the shutter 410 according to the user's imaging instruction, and performs autofocus control and aperture control based on image data generated by the image processing unit 413 .

A memory 421 temporarily records the digital imaging signal output from the A/D converter 412 and the image data generated by the image processing unit 413 . The memory control unit 422 controls data exchange among the A/D converter 412 , the image processing unit 413 and the memory 421 . The nonvolatile memory 423 is an electrically erasable/recordable read-only memory, and stores constants, programs, and the like for the operation of the camera control unit 420 . The system memory 424 is a readable and writable memory that stores constants and variables for operation of the camera control unit 420 and programs read from the nonvolatile memory 423 .

The system timer 425 measures the no-operation time until the camera 100 is put into a power-saving state to automatically turn off the camera 100 in order to prevent battery consumption when the camera 100 is not operated by the user, and the exposure time of the image sensor 115 by the shutter 410. do.

The power supply unit 430 is composed of a primary battery, a secondary battery, or an AC adapter. The power supply control unit 431 determines whether or not a battery is attached to the power supply unit 430, determines the type of the attached battery, detects the remaining battery level, and supplies the required voltage to the supply destination at the required timing.

The camera communication terminal 440 is electrically connected to the lens communication terminal 506 provided in the lens unit 500 and enables communication between the camera control section 420 and the lens control section 505 in the lens unit 500 .

A recording medium I/F 441 is an interface with a recording medium 600 detachably attached to the camera 100 . A recording medium 600 is a memory card, a FLASH (registered trademark) memory, a hard disk, or the like, and records image data (still images and moving images) generated by the image processing unit 413 .

The shake detection unit 442 is configured by a gyro sensor or the like, and outputs a signal corresponding to shake of the camera 100 due to camera shake or the like (hereinafter referred to as camera shake).

The A/D converter 412, the image processing unit 413, the camera control unit 420, the memory 421, the memory control unit 422, the nonvolatile memory 423, the system memory 424, the system timer 425, and the power supply control unit 431 described above include a CPU, an IC, A plurality of electronic elements such as memory chips are mounted on the main substrate 107 . A recording medium I/F 441 and a shake detection unit 442 are also mounted on the main board 107 .

The memory 421 described above also serves as an image display memory (video memory). The digital imaging signal and image data written in the memory 421 are transmitted via the memory control unit 422 to the rear display unit 450 provided on the rear surface of the camera 100 and the EVF display unit 451 arranged in the viewfinder, and the live view image and the image data are displayed. It is displayed as a confirmation image. The rear display unit 450 and the EVF display unit 451 are composed of display elements such as liquid crystal panels and organic EL panels.

The operation unit 460 is an input unit that receives an operation by a user, and outputs a signal according to the operation received here to the camera control unit 420 . The operation unit 460 includes various operation members such as a mode switching switch 461 , a first shutter switch 463 and a second shutter switch 464 interlocked with a shutter button 462 , a touch panel 465 and a power switch 466 . The mode switching switch 461 is operated to switch imaging modes such as still image imaging and moving image imaging. The shutter button 462 is operated by the user to give an imaging preparation instruction and an imaging instruction. The first shutter switch 463 is turned on by half-pressing the shutter button 462 and outputs the SW1 signal to the camera control section 420 . The second shutter switch 464 is turned on by fully pressing the shutter button 462 and outputs the SW2 signal to the camera control section 420 . The camera control unit 420 executes imaging preparation operations (autofocus, automatic exposure, auto white balance, etc.) according to the SW1 signal, and executes still image imaging processing for recording according to the SW2 signal.

The operation unit 460 also includes a touch panel 465 provided on the rear display unit 450 . A power switch 466 is operated to switch ON/OFF of the power of the camera 100 .

The fan 130 is provided to generate an airflow near the imaging unit 106 including the imaging element 115 which is a heat source to cool the imaging element 115 . A camera control unit (control means) 420 controls driving (rotation/stop and number of rotations) of the fan 130 .

In the lens unit 500 , a lens communication terminal 506 is a communication terminal for the camera communication terminal lens unit 500 to communicate with the digital camera 100 .

In the lens unit 500, the lens control unit 505, which has received a control instruction from the camera control unit 420 by communication, controls the position (aperture value) of the aperture 503 and the focus control of the lens 501 via the aperture drive unit 504 and the lens drive unit 502. I do.

FIG. 1 shows an exploded view of the camera 100 obliquely from the rear side. The camera 100 has a front base 102, a rear cover 101, a top cover 103, a bottom cover 104 and side covers 105 as exterior members.

The front base 102 is made of die-cast magnesium or resin, has a mount 102a to which the lens unit 500 is attached, and is provided with a grip for the user to hold the camera 100. As shown in FIG.

Attached to the rear cover 101 are a plurality of operation members that can be operated by the user, and a rear display section 450 that can be opened and closed. A finder unit 109 having an EVF display section 451 and an eyepiece section 443 to which a user observing the EVF display section 451 brings an eye 700 closer as shown in FIG. 6 is attached to the rear cover 101 .

The top cover 103 is provided with a plurality of operation members (mode switch 461, shutter button 462, power switch 466, etc.) that can be operated by the user. The bottom cover 104 is formed with an opening for exposing a battery cover that closes the opening of the battery chamber and a tripod mount that is fixed to the bottom surface of the front base 102 . A terminal cover 105a is attached to the side cover 105 to protect an external communication terminal 107c, which will be described later.

An imaging unit 106 having an imaging element 115 and an image blur correction mechanism, a main board 107, a shutter 108, and a chassis 110 are arranged inside these exterior members. The imaging unit 106 includes a movable unit 114 capable of moving the imaging device 115 in two directions perpendicular to the imaging optical axis (optical axis of the lens unit 500) and mutually orthogonal, and the movable unit 114 moving in the two directions. and a driving base, which is movably held and will be described later.

The main board 107 is composed of a multilayer board, and various electronic parts including the plurality of electronic elements described above are mounted on both sides thereof. The main board 107 is fixed to the front base 102 and the metal chassis 110 with screws. Further, the main substrate 107 is mounted with a recording medium connector 107b for accommodating an external recording medium, and an external communication terminal 107c for connecting a cable for connecting to an external device.

The image pickup device 115 consumes particularly large power and generates a large amount of heat in the camera 100, and the temperature thereof easily rises. The image-capturing time of the camera 100 is often limited by the guaranteed operating temperature of the image sensor 115, except for the remaining battery power. In order to lengthen the imaging possible time as much as possible, it is necessary to cool the imaging device 115 so that its temperature does not exceed the operation guarantee temperature. The imaging unit 106 including the imaging device 115 is fixed to the front base 102 with screws, and the heat of the imaging unit 106 is transferred to the front base 102 .

The fan 130 is arranged in the vicinity of the imaging unit 106, and is oriented so that the air discharge direction is orthogonal to the imaging optical axis. The air from the fan 130 flows in one direction along the back surface of the imaging device 115, thereby effectively cooling the imaging device 115. FIG. A centrifugal fan is used as the fan 130 in this embodiment. However, other fans such as an axial fan may be used. Further, the direction of the fan 130 is not limited to the direction described above, and the direction in which the airflow from the fan 130 directly hits the imaging element 115 may be sufficient, and the ejection direction may not be perpendicular to the imaging optical axis.

Further, the plurality of electronic elements 107a mounted on the main substrate 107 as described above are also heat sources. Therefore, by arranging the fan 130 so as to flow air between the imaging device 115 and the main substrate 107, it is possible to obtain a cooling effect for the imaging device 115 and the plurality of electronic devices 107a.

However, since the image pickup unit 106 having the movable unit 114 has few heat dissipation paths, the image sensor 115 can be cooled more effectively by arranging the outlet of the fan 130 closer to the image pickup unit 106 than the main substrate 107. be able to.

FIGS. 2A and 2B show an exploded imaging unit 106 viewed obliquely from the front side and obliquely from the rear side, respectively. The imaging unit 106 has a movable unit 114 and a drive base (base member) 113 . The movable portion 114 is composed of an imaging element 115 and a sensor holder 117 that holds the same. The imaging device 115 is configured by bonding a sensor chip having a plurality of pixels to an imaging substrate 115a and electrically connecting electrodes of the sensor chip and an imaging circuit on the imaging substrate 115a by wire bonding. The imaging element 115 is fixed to the sensor holder 117 by adhesion. Sensor electronic elements 115b, such as capacitors, resistors, and regulators, which constitute an imaging circuit, are mounted on the back surface (rear surface) of the imaging substrate 115a opposite to the surface where the sensor chip is attached.

The sensor holder 117 is held by the drive base 113 so as to be movable in two directions (horizontal direction and vertical direction) perpendicular to the imaging optical axis and perpendicular to each other. Three coils 116 are fixed to the sensor holder 117 . The drive base 113 holds three magnets 118 so as to face the three coils 116 . The movable portion 114 is attracted in the imaging optical axis direction (rear side) by the magnetic force of the magnet 118 . Between the movable portion 114 and the driving base 113, balls (not shown) held by ball holding portions 117a provided at a plurality of locations of the sensor holder 117 are arranged. Thereby, the movable part 114 is positioned in the imaging optical axis direction with respect to the drive base 113 via the ball.

In the imaging unit 106 configured in this manner, the imaging element 115 can be moved in the two directions described above by controlling the energization of the three coils 116 . The camera control unit 420 controls energization of the coil 116 according to the camera shake detected through the shake detection unit 442 so as to move the movable unit 114 in the direction of reducing (correcting) the image blur caused by the camera shake.

Electrical connection between the imaging unit 106 and the main board 107 is performed using an FPC. The imaging signal FPC 111 shown in FIG. 1 has wiring for transmitting imaging signals output from the imaging device 115 and control signals necessary for driving the imaging device 115 . 420. Further, the imaging power supply FPC 112 shown in FIG. 1 has wiring for supplying power for driving the imaging device 115 from the power control unit 431 to the imaging device 115 .

Next, a configuration for performing efficient cooling by the fan 130 described above will be described. As shown in FIGS. 3A, 3B, and 4A, around the imaging unit 106 and the main substrate 107, a first dividing member (partitioning member) that divides the internal space of the camera 100 is provided. A member 201 and a second split member 202 are arranged. Figures 3(a) and (b) show them from the rear and side respectively. A cross section of the first split member 201 is shown so that the internal structure can be understood. FIG. 4(a) shows these components disassembled and viewed obliquely from the front side.

The first split member 201 is composed of a first airflow restricting portion 201a and a third airflow restricting portion 201b combined therewith. The first dividing member 201 is arranged downstream (lower in each drawing) than the imaging element 115 in one direction in which air flows along the back surface (rear surface) of the imaging element 115 . In other words, it is arranged on the opposite side of the fan 130 with the imaging unit 106 interposed therebetween in the in-plane direction perpendicular to the imaging optical axis.

The second dividing member 202 is composed of a second airflow restricting portion 202a and a fourth airflow restricting portion 202b, which are arranged in a region around the imaging unit 106 where the first dividing member 201 is not arranged. . Specifically, the second airflow restricting section 202a is arranged on the same side as the fan 130 with respect to the imaging section 106 in the in-plane direction orthogonal to the imaging optical axis (upper side in each drawing). In addition, the fourth airflow restricting portion 202b is arranged on the opposite side of the imaging portion 106 from the side cover 105, which is an exterior member (right side in FIG. 3A, left side in FIG. 4A). . Note that the side cover 105 also serves as part of the second split member.

As shown in FIG. 3B, each of the first dividing member 201 and the second dividing member 202 is arranged so that a narrow gap of about 1 mm or less is formed between them and the imaging unit 106 in the imaging optical axis direction. . However, as shown in FIG. 3A, when the gap portion is viewed from the imaging optical axis direction, a part of each of the first dividing member 201 and the second dividing member 202 becomes the imaging unit 106 (driving base 113). It is superimposed with This makes it difficult for part of the air flowing through the second space B to flow into the first space A through the gap. Furthermore, the gap between the bottom cover 104 and the side cover 105, which are exterior members, is set to be about 1 mm or less.

By the first dividing member 201 and the second dividing member 202 arranged in this way, as shown in FIG. The surface on which the sensor electronic element 115b is mounted) and the second space B between the main substrate 107 can be separated. Separation here means that it is sufficient to suppress the intrusion of fine particles (dust) contained in the airflow from the fan 130 inside the camera 100 to a considerable extent from the second space B into the first space A. It may not be completely preventable. Of course, the above-described gap may be completely prevented from entering dust by arranging an elastic member or the like.

It is desirable that neither the first division member 201 nor the second division member 202 have a hole through which air passes, but they may have a small hole through which the amount of air passing is very small.

As shown in FIG. 3B, the imaging device 115 includes a sensor chip 115c fixed to an imaging substrate 115a, and an infrared cut filter and a low-pass filter covering a light receiving surface (imaging surface) that is the front surface of the sensor chip 115c. and an optical member 115d such as a cover glass. The end portion 201a1 of the first airflow restricting portion 201a arranged below the imaging portion 106, which faces the imaging portion 106, is located behind the surface (foremost surface) of the optical member 115d in the imaging optical axis direction, and It is arranged on the front side of the back surface of the element 115 (imaging board 115a). That is, the end portion 201a1 is arranged so that the airflow hits the sensor electronic element 115b mounted on the back surface of the imaging substrate 115a. The end portion 201a1 is a portion that is close to the imaging section 106 (movable section 114) in the direction perpendicular to the imaging optical axis and divides the first space A and the second space B in the imaging optical axis direction.

The first airflow restricting portion 201a may have a configuration capable of separating the first and second spaces A and B as described above. That is, the gap between the imaging unit 106, the bottom cover 104, and the side cover 105 should be narrow, and at least a portion thereof (for example, the end portion 201a1) should be arranged at the above-described position in the imaging optical axis direction. As a result, dust contained in the airflow from the fan 130 can be suppressed from adhering to the surface of the optical member 115 d in the imaging device 115 without increasing the size of the camera 100 .

In addition, as shown in FIG. 3B, at least a portion of the second airflow restricting portion 202a arranged above the imaging unit 106 (the end portion 202a1 facing the imaging unit 106) is located at the sensor in the imaging optical axis direction. It is arranged on the rear side of the light receiving surface of the chip 115 c and on the front side of the discharge port 131 of the fan 130 . The end portion 202a1 is a portion that is close to the imaging section 106 (movable section 114) in the direction orthogonal to the imaging optical axis and divides the first space and the second space in the imaging optical axis direction.

As shown in FIG. 4B, the third airflow restricting portion 201b is an airflow (indicated by an arrow in the figure) that is discharged from the fan 130 and passes through the second space B to cool the imaging element 115 and the main substrate 107. ) are provided as guide portions for guiding the recess 201c and the protrusion 201d. A collecting member 203 is provided on the bottom surface (bottom portion) of the concave portion 201c and the ceiling surface (facing portion) facing the convex portion 201d. Further, the third airflow restricting portion 201b also has an opening 201e for discharging air to the outside. The third airflow restricting portion 201b and the first airflow restricting portion 201a are fixed to each other so as to be integrated.

The fourth airflow restricting section 202b is arranged so that the gaps between it and the imaging section 106 and between it and the first dividing member 201 are narrow.

FIG. 3B shows the path along which the air discharged from the fan 130 circulates inside the camera 100 . As indicated by arrows in the figure, the air discharged from the discharge port 131 of the fan 130 passes through the second space B between the imaging unit 106 and the main substrate 107, and flows through the first and third airflow restricting units. It flows into the internal channel inside the first dividing member 201 constituted by 201a and 201b. The air that has passed through the internal flow path in the first dividing member 201 flows through the opening 201e to the opposite side (rear side) of the imaging unit 106 inside the camera 100 . After that, the air flows upward inside the camera 100 through the third space C between the main substrate 107 and the exterior member (bottom, rear and top covers 101, 104, 103 are schematically shown in the figure). , and is sucked into the suction port of the fan 130 . It is preferable to appropriately set the flow path of the third space C so as to reduce the resistance to the airflow passing therethrough. It is preferable that the flow resistance of the third space C is at least lower than the flow resistance of the second space B.

Between the first and second airflow restricting portions 201a and 202a and the movable portion 114, a gap corresponding to the range of movement of the movable portion 114 in the vertical direction is provided. The size of this gap is preferably as small as possible, and it is desirable that at least the total cross-sectional area of the gap is smaller than the minimum channel cross-sectional area of the internal channels in the first dividing member 201 . This is because by increasing the channel cross-sectional area of the internal channel in the first dividing member 201, the channel resistance becomes smaller than that of the gap, and the liquid flows out from the internal channel through the opening 201e. This is because the air can easily flow rearward in the camera 100 . This makes it difficult for dust contained in the airflow to adhere to the front imaging element 115 .

The details of the third airflow restricting portion 201b and the collecting member 203 shown in FIG. 4B will be described. The air that cools the imaging device 115 and the main substrate 107 and flows into the first divided member 201 flows into the recess 201c provided in the third airflow restricting portion 201b, where part of the air stays. At this time, dust in the stagnant air falls toward the bottom surface of the recess 201c. A collecting member 203 is provided on the bottom surface. The collecting member 203 is a member capable of collecting dust, and is made of a tape having an adhesive surface, an elastic member having adhesive properties, or a porous member such as a sponge. Dust falling on the bottom is thus collected.

The air flowing out of the concave portion 201c then hits the slope of the convex portion 201d, travels upward, and hits the collecting member 203 provided on the ceiling surface of the third airflow restricting portion 201b. At this time, dust in the air is collected by the collecting member 203 . Note that the collecting member 203 may be provided anywhere on the inner surface of the third airflow restricting portion 201b. The air from which dust has been reduced in this way flows out rearward through the opening 201e of the third airflow restricting portion 201b.

As described above, in this embodiment, the first and second dividing members 201 and 202 make it difficult for the airflow from the fan 130 to flow into the first space A on the imaging surface side of the imaging element 115, and The collecting member 203 collects dust contained in the air flow on the B side. This can prevent dust from adhering to the imaging surface of the imaging element 115 and the surface of the optical member 115d.

FIG. 5 is a cross-sectional view of exterior members (front base 102 and bottom, rear and top covers 101, 104, 103), imaging unit 106, fan 130, and first division member 201 of camera 100', which is Embodiment 2 of the present invention. is schematically shown.

The first dividing member 201 is arranged to surround a front space (first space) M from the periphery of the optical member 115 d to the front base 102 in the imaging unit 106 . The end portion 201a1 of the first split member 201 facing the imaging unit 106 in the first airflow restricting portion 201a is located behind the surface (frontmost surface) of the optical member 115d in the imaging optical axis direction, and the imaging element 115 (imaging It is arranged on the front side of the back surface of the substrate 115a). The end portion 201a1 is a portion that separates the front space M from the rear space (second space) U in the imaging optical axis direction. Further, the end portion 201a1 is arranged so that the gap between the end portion 201a1 and the driving base 113 of the imaging section 106 in the imaging optical axis direction is about 1 mm or less.

The rear space U is a space facing the rear surface (sensor electronic element 115b) of the image sensor 115 and the inner surfaces of the bottom, rear and top covers 101, 104, and 103, and the airflow discharged from the fan 130 in this space. circulates.

In this embodiment, the first dividing member 201 makes it difficult for the airflow from the fan 130 to flow into the front space M on the imaging surface side of the imaging device 115 . As a result, dust contained in the airflow in the rear space B can be prevented from adhering to the imaging surface of the imaging element 115 and the surface of the optical member 115d. This embodiment is particularly suitable for cameras without shutters.

Each embodiment described above is merely a representative example, and various modifications and changes can be made to each embodiment in carrying out the present invention.

REFERENCE SIGNS LIST 100 digital camera 106 imaging section 107 main substrate 115 imaging element 115a imaging substrate 115c sensor chip 130 fan 201 first division member 202 second division member 203 collection member

Claims (10)

An imaging device having an imaging element with an optical member in front of an imaging surface,
a fan for generating an air flow in one direction along a rear surface of the image pickup element opposite to the image pickup surface, inside the image pickup device;
a first space in which the optical member and the imaging surface are arranged, and a second space in which the fan is arranged and the air flows, provided downstream of the imaging element in the one direction, and and a first split member that divides into
A portion of the first dividing member that divides the first space and the second space in the imaging optical axis direction is positioned rearward of the forefront surface of the optical member and forward of the rear surface of the imaging device. An imaging device characterized by: a second dividing member arranged at a position different from the first dividing member inside the imaging device and dividing the internal space into the first space and the second space;
A portion of the second dividing member that divides the first space and the second space in the imaging optical axis direction is located rearward of the forefront surface of the optical member and forward of the outlet of the fan. 2. The imaging apparatus according to claim 1, wherein: The imaging device is held by a base member,
3. The imaging apparatus according to claim 1, wherein the first and second divided members have portions overlapping with the base member when viewed from the imaging optical axis direction. The imaging device according to any one of claims 1 to 3, wherein at least part of the second divided member is an exterior member of the imaging device. 5. The method according to any one of claims 1 to 4, wherein a collecting member for collecting fine particles contained in the air flowing through the second space is provided in a portion of the first dividing member on the side of the second space. The imaging device according to any one of the items. A concave portion for retaining at least part of the air flowing through the second space is provided in a portion of the first dividing member on the second space side,
6. The imaging device according to claim 5, wherein the collecting member is arranged at the bottom of the recess. A protrusion that changes the direction of the air flow in the second space is provided on a portion of the first dividing member on the second space side,
6. The imaging apparatus according to claim 5, wherein the collecting member is provided at a position facing the convex portion. further comprising a substrate arranged behind the imaging element and having an electronic element mounted thereon;
8. The air outlet of the fan is positioned forward of the substrate in the optical axis direction of the imaging, and the air flows along the substrate in the one direction. The imaging device according to . A third space is formed between the substrate and an exterior member facing the substrate for returning the air that has flowed through the second space to the suction port of the fan,
9. The method according to any one of claims 1 to 8, wherein a flow path resistance of the third space is smaller than a flow path breaking resistance between the imaging element and the substrate in the second space. imaging device. the imaging element is movable in a direction orthogonal to the imaging optical axis direction, and a gap corresponding to the movement range of the imaging element is provided between the first and second divided members and the imaging element;
The first dividing member has an internal flow path for passing the air that has flowed along the rear surface of the imaging element in the second space to the third space,
10. The imaging device according to any one of claims 1 to 9, wherein a total cross-sectional area of said gaps is smaller than a minimum channel cross-sectional area of said internal channel.

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