JP2016045264A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of a camera with a built-in optical filter switching unit.SOLUTION: An optical filter switching unit is disposed obliquely relative to an optical axis, and a drive motor is disposed below a sensor substrate.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an imaging apparatus having an optical filter switching mechanism.

  A conventional imaging device uses a motor for switching in a filter mechanism that can be switched between a filter that is built into a lens and that rotates a filter frame that holds a plurality of filters and is inserted into the optical path of the optical system. An imaging apparatus using a lens having an imaging element mounting surface is disclosed (see Patent Document 1).

JP 2011-118229 A

  However, in the above conventional example, a motor is inserted between the optical filter and the image pickup device, which causes a problem that the image pickup apparatus becomes long in the optical axis direction.

  An imaging apparatus according to the present invention includes a unit capable of switching a plurality of filters inserted in an optical path of an optical system, and further includes a motor that drives the unit, an imaging element, and an imaging board on which the imaging element is mounted, and the switching In the unit, the plurality of filters are arranged in the opening of the plate-shaped frame body, and by rotating the frame body, it is possible to insert one of the plurality of filters into the optical path of the lens, When viewed from the side of the product, the rotation axis is lowered with respect to the optical axis, and the motor that is the power for rotating the frame body is substantially parallel to the rotation axis and is inserted into the lens optical path. It is characterized in that it is located under the image pickup substrate disposed behind the filter.

  According to the present invention, since the imaging device is arranged above the motor, the length of the imaging device main body in the optical axis direction can be shortened, and the miniaturization can be promoted.

The perspective view which showed the external appearance of the imaging device. The perspective view of the state which removed the lens part. FIG. 3 is a block diagram illustrating a configuration of operation control of an imaging device according to an embodiment of the present invention. 1 is a schematic exploded view of an imaging device showing one form of an embodiment of the present invention. Sectional drawing of the sensor unit 700. FIG. The exploded perspective view of sensor unit 700. FIG. The disassembled perspective view of ND unit. Sectional drawing of ND unit. Sectional drawing of the imaging device of this invention. The rear view of the imaging device of this invention.

  Hereinafter, preferred embodiments of an imaging apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In the description, the subject side is the front and the photographer side is the rear. As for the left and right, the right side is the R side and the left side is the L side as viewed from the subject. In addition, it demonstrates centering on the part to which this invention relates, and the part which is not directly related to invention is abbreviate | omitted.

≪Appearance explanation≫
FIG. 1 is a perspective view showing an appearance of an imaging apparatus according to the present invention. A replaceable lens unit 11 is attached to the main body 1. FIG. 2 is a perspective view showing a state where the lens unit 11 is removed.

  An annular mount 12 is provided on the front surface of the main body. At the time of photographing, the lens portion 11 is fixedly mounted substantially concentrically by a locking portion (not shown) of the mount portion 12. Microphones 16 are provided on the left and right sides of the front surface of the main body 1 with the lens portion 11 in between. A power button 17 is provided on the R side upper portion of the main body 1.

  FIG. 10 shows a perspective view from the back. An image display unit 21 with a touch panel function is provided on the back of the main body 1 so that images can be confirmed and various setting operations can be performed. A trigger button 13 for starting and stopping recording and a zoom lever 15 for performing zooming operation of a lens having an angle of view are provided on the upper side of the main body 1 on the L side.

≪Operation control explanation≫
FIG. 3 is a block diagram showing a configuration of operation control of the imaging apparatus 1 of the present invention. The imaging apparatus 1 includes an optical lens group including an optical control system such as focus and zoom, a lens 11 including a diaphragm, a main imaging unit 502 including an imaging element such as a CCD, a camera signal processing unit 503, a compression / decompression processing unit 504, and an image display. Unit 21, recording / playback processing unit 506, card control unit 507 for controlling the memory card 519, large-capacity internal memory control unit 508 for controlling the large-capacity built-in memory 520, microphone 16, audio signal processing unit 510, memory 511, memory control A unit 512, a CPU 513, an operation unit 514, a digital I / F 515, an input / output unit 516 for connecting to an external device 522, a GPS reception unit 524, a GPS signal processing unit 525, and a power supply control unit 517. The functional blocks are connected to each other via a data bus 518 so that data communication can be performed.

  In such an imaging apparatus 1, the memory 511 has a program storage area and a data work area, and is used by time sharing in each functional block via the data bus 518, and is controlled and managed by the memory control unit 512. . The CPU 513 is a central processing circuit that performs overall control of the entire imaging apparatus 1 by executing a predetermined program.

  The operation unit 514 includes the image display surface 21 with the touch panel, a power button 22, a trigger button 23, and the like. The power button 22 is pressed to turn on / off the power. The trigger button 23 can be pressed / started to start / stop moving image shooting. Other operations are performed on the image display surface 21 with a touch panel. As described above, the operation unit 514 has a function of instructing the CPU 513 to perform an operation based on a key operation from the user.

  The digital I / F 515 exchanges signals with the external device 521 in accordance with a standard such as USB (not shown). A memory card 519 is a detachable flash memory such as an SD card or a compact flash (registered trademark), in which shooting data and audio data are recorded.

  The power supply control unit 517 includes a battery detection circuit, a DC-DC converter, a switch circuit that switches a block to be energized, and the like, and detects whether or not the battery 523 is attached, the type of battery, and the remaining battery level. The battery 523 is lithium ion or the like and supplies power to the imaging device 1.

  The GPS receiving unit 524 acquires position and time data from GPS satellites. This data is processed by the GPS signal processor 525, and the position of the GPS receiver 524 and the time at that position are calculated. In the imaging device 1, the calculated position information and time information are written in the large-capacity internal memory 520 or the memory card 519 together with the image data. At the time of reproduction, the position information and time information can be referred to and used for organizing data and storage.

  Next, the photographing operation, recording operation, and reproduction operation of the imaging device 1 will be described. For example, when a photographing operation and a recording operation are instructed by the operation unit 514, the light from the subject becomes an optical signal whose predetermined brightness, angle of view, focus, and the like are controlled by the lens 11, and is input to the main imaging unit 502. Input. The main imaging unit 502 converts the input optical signal into an electrical signal and outputs it to the camera signal processing unit 503. The camera signal processing unit 503 converts this electric signal into a digital image signal. The image signal is subjected to signal processing such as color separation, gradation correction, and white balance adjustment, and then output.

  The audio signal processing 510 outputs the audio signal as audio data by gain-controlling the audio signal input from the microphone 12 to a predetermined level and digitizing it. The compression / decompression processing unit 504 compresses and encodes the image data output from the camera signal processing unit 503 and the audio data output from the audio signal processing unit 510 using a predetermined compression encoding method. Shooting data to be compressed and encoded processed by the compression / decompression processing unit 504 is displayed on the image display unit 21. The image display unit 21 also displays the operating status of the imaging device 1 as necessary.

  The recording / playback processing unit 506 performs error correction coding processing, modulation processing, and the like on the data after compression coding obtained by the compression / decompression processing unit 504, and further performs synchronization, ID, GPS reception unit 524, and GPS signal processing. Data such as position information and time information calculated from the unit 525 is added and converted into a form suitable for recording, and then recorded on a recording medium such as a large-capacity internal memory 520 or a memory card 519. At this time, the large-capacity internal memory control unit 508 performs recording control of the large-capacity internal memory 520, and the card control unit 507 performs recording control of the memory card 519.

  On the other hand, when a reproduction operation is instructed by the operation unit 514, the recording / reproduction processing unit 506 detects original digital data from data read from the large-capacity internal memory 520 or the memory card 519, and performs processing such as error correction and demodulation. Apply. Further, a clock synchronized with the reproduction data is generated by a PLL circuit.

  The compression / decompression processing unit 504 performs decompression processing corresponding to a predetermined compression encoding method on the data output from the recording / playback processing unit 506, and acquires shooting data and audio data before compression encoding. The image display surface 21 displays the reproduction data obtained by the compression / decompression processing unit 504.

  When the operation unit 514 instructs to record input data from the digital I / F 515, the CPU 513 inputs image data or audio data from the external device 521 in a digital signal state using the digital I / F 515. The data is sent to the recording / playback processing unit 506. At this time, it is assumed that the image data and audio data from the external device 521 have already been encoded, and the recording / playback processing unit 506 performs processing necessary for recording on the input data as described above to perform a large-capacity internal processing. Recording is performed on a recording medium such as the memory 520 or the memory card 519.

  When the operation unit 514 instructs to record an input signal from the input / output unit 516, the CPU 513 controls the input / output unit 516 and inputs an image and audio signal output from the external device 522.

  The input / output unit 516 converts the image and audio signals output from the external device 522 into digital data and outputs the digital data to the memory 511. The CPU 513 outputs the image and audio data stored in the memory 511 to the compression / decompression processing unit 504, compression-codes them, and sends them to the recording / reproduction processing unit 506.

  As described above, the recording / playback processing unit 506 performs processing necessary for recording on the encoded data and records it on a recording medium such as the large-capacity internal memory 520 or the memory card 519.

  When the operation unit 514 instructs to switch the density of the ND filter, the CPU 513 drives the motor of the ND unit unit to move the designated ND filter to the light transmission position.

≪Internal outline explanation≫
FIG. 4 shows an outline of the inside of the main body. A front cover 31 having a mount portion 12 is provided on the front side of the main body, and a back cover 32 having an image display portion 21 is provided on the rear side. Between the front cover 31 and the back cover part 32, a chassis 33, an ND unit 650, a sensor unit 700, and a control board 34 are arranged in this order from the front side.

  The ND unit 650, the sensor unit 700, and the control board 34 are each fixed to the chassis 33 using screws (not shown), and the chassis 33 is fixed to the front cover 31.

≪Sensor unit configuration explanation≫
The configuration of the sensor unit 700 is shown in FIGS. FIG. 5 is a cross-sectional view of the sensor unit 700. FIG. 6 is an exploded perspective view of the sensor unit 700.

The sensor unit 700 is arranged in the order of the sensor 710, the sensor substrate 720, and the sensor plate 730 from the front side. The sensor 710 includes terminal legs 712 on four sides, and is mounted on the sensor substrate 720 with solder to form the main imaging unit 502 described above.
The sensor substrate 720 includes a square hole 721, and the sensor back surface portion 711 of the sensor 710 is exposed when the sensor 710 is mounted.

  The sensor plate 730 has a convex portion 731 that is drawn so that the vicinity of the center is large and sticks forward. The sensor back surface portion 711 is bonded and fixed to the front surface of the convex portion 731 to form a sensor unit 700. The sensor substrate 720 includes the camera signal processing unit 503 described above.

≪Configuration of ND unit≫
FIG. 7 is an exploded perspective view of the ND unit 650, and FIG. 8 shows a cross section of the ND unit 650. An ND front cover 660 is disposed on the front surface. The ND front cover 660 is provided with a frame-like standing wall 662 around an opening in which an octagonal opening 661 is provided slightly above the center. Three types of optical filters 670a, 670b, and 670c having different properties are disposed behind the ND front cover 660. The optical filter is substantially octagonal.

  The optical filters 670a, 670b, and 670c are fixed to three openings 680 of a substantially disc-shaped ND plate 680 with an adhesive. The three openings are the same radial holes at substantially equal angles around the center hole 682 of the disk, and the outer shape is slightly smaller than the optical filters 670a, 670b, 670c described above, and the optical filter 670a around the hole. , 670b and 670c.

  A gear 683 is formed on the outer periphery of the ND plate 680. An ND rear cover 693 is provided behind the ND plate 680. The outer shape of the ND rear cover 693 is a flat box shape having a circular lower portion and a rectangular upper portion.

  As shown in FIG. 8, the ND unit 650 is configured such that the ND plate 680 is sandwiched between the ND front cover 660 and the ND rear cover 693. The circular center portion of the ND rear cover 693 has a cylindrical shape 695. The hole portion 681 of the ND plate 680 is rotatably supported on the outer peripheral diameter of the cylindrical shape 695. Further, a boss 663 of the ND front cover 660 is inserted and fixed inside the cylindrical shape 695 by a screw 664.

  The motor 690 is fixed to the ND rear cover 693. Since the main body of the motor 690 has a cylindrical shape, the ND rear cover covers most of the motor 690 with a bag-like convex shape 696. The rotation axis of the motor is parallel to the rotation axis of the ND plate 680. A gear 691 is press-fitted to the tip of the motor 690, the gear 691 is engaged with the gear 683, and the ND plate is rotated by rotating the motor 690.

<Main body configuration>
2 and 9 show a schematic configuration of the main body 1. FIG. 9 shows a cross-sectional view of the main body 1. The lens 11 is engaged and fixed to the mount 12 by a locking portion (not shown). A mount chamber 36 for the front cover 31 is provided at the back of the mount portion 12. The mount chamber 36 has an opening 37. A chassis portion 33 is located behind the mount chamber 36. The chassis portion 33 includes a chassis opening 38 surrounded by a rib-like wall. The chassis opening 38 forms an opening continuous with the opening 37. An ND unit 650 is provided at the back of the chassis 33, and a sensor 710 is disposed behind the ND unit 650. The sensor 710 is positioned orthogonal to the lens optical axis.

  The lens beam 200 passes through the opening 37 and the opening 38 described above, passes through the opening 661 of the ND unit 650, and is further selected by the photographer among the ND filters 670a, 670b, and 670c. And passes through the opening 694 and reaches the light receiving surface of the sensor 710.

  Here, the angle a formed by the ND unit 650 and the lens optical axis 210 is inclined by 90 degrees or more. Because of such inclination, the motor 690 and the cylindrical portion 695 of the ND unit are disposed below the sensor substrate 720 and the sensor plate 730. There is a space below the sensor substrate 720 and the sensor plate 730, and the motor 690 and the cylindrical portion 695 described above fill the space. For this reason, the area B can be sharply cut at the front lower portion of the main body 1, and the size of the main body can be reduced.

  In addition, dust or dust may enter from the mount during lens replacement. However, since the ND filters 670a, 670b, and 670c are always slightly facing downward, dust mixed during lens replacement also drops in the shooting posture. The effect is easy.

  Although the present invention has been described in detail based on the preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. For example, in the present invention, it is a disc-shaped ND plate, but it may be a semicircle or a fan shape, and may be partially cut out. Further, in the present embodiment, the imaging device of the interchangeable lens has been described, but a built-in lens may be used. I explained three types of filters, but you can use as many as you like.

1 Body, 11 Lens, 12 Mount, 13 Trigger SW,
15 ZOOM lever, 16 microphone, 17 power button,
21 Display surface with touch panel function, 31 Front cover, 32 Back cover,
33 Chassis, 34 Control board, 36 Mount chamber, 37 Opening,
38 Chassis opening, 650 ND unit, 660 ND front cover,
661 opening, 663 boss, 664 screw, 670a ND filter,
670b ND filter, 670c ND filter, 680 ND plate,
681 hole, 682 center hole, 683 gear, 690 motor, 691 gear, 693 ND rear cover, 694 opening, 695 cylindrical shape,
700 sensor unit, 710 sensor, 720 sensor substrate,
730 sensor plate, 200 lens beam

Claims (1)

A unit capable of switching a plurality of filters to be inserted into the optical path of the optical system, and further comprising a motor and an image sensor for driving the unit, and an imaging substrate on which the image sensor is mounted, wherein the plurality of filters in the switching unit Is arranged in the opening of the plate-shaped frame, and by rotating the frame, it is possible to insert one of the plurality of filters into the optical path of the lens, when viewed from the side of the product, The rotating shaft is lowered forward with respect to the optical axis, and the motor that is the power for rotating the frame is parallel to the rotating shaft and is disposed behind the filter inserted in the lens optical path. An image pickup apparatus located under an image pickup substrate.