JP2016015661A - Imaging device with wireless communication function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arrangement structure of printed wiring boards or connection cables for which noises and unnecessary radiation are considered concerning a plurality of printed wiring boards or a connection cables that are mounted for each unit on an imaging apparatus and distracted.SOLUTION: An imaging apparatus uses a thin wire coaxial cable for a wiring, accommodated inside a rotatable display unit, connected to a main substrate. The thin wire coaxial cable is made to be of a flat tabular shape by laminating with a film a portion disposed in parallel to an image sensor flexible printed wiring board held by an optical lens barrel unit. A distracted part of the flexible printed wiring board for connecting from a wireless communication module to the main substrate is disposed by being overlapped with the thin wire coaxial cable that is made to be of a flat tabular shape by laminating with a film.

Description

  The present invention relates to an electronic device having a wireless communication function, and more particularly to an internal structure of an imaging apparatus.

  There is an imaging apparatus that photoelectrically converts an optical image to generate image data and records it as a data file. In the imaging apparatus, there are a main substrate on which a system IC, an image processing IC, a printed wiring board incorporated in a unit constituting the imaging apparatus, and a connector for electrical connection with a cable are mounted. With the downsizing and thinning of the imaging device, the main board is disposed on the grip side that the photographer holds at the time of shooting.

  An optical lens barrel unit is disposed substantially at the center of the imaging apparatus. The optical lens barrel unit can obtain an optimum optical image by driving a plurality of optical lenses such as a zooming mechanism, an automatic focusing mechanism, and an anti-vibration mechanism. In the optical lens barrel unit, a barrel flexible printed wiring board for operating a zooming mechanism, an autofocus mechanism, and a vibration isolation mechanism is integrated. The lens barrel flexible printed wiring board held by the optical lens barrel unit is electrically connected to the main board. The optical image that has passed through the plurality of optical lenses is photoelectrically converted by the image sensor mounted on the image sensor substrate. A signal from the image sensor board is electrically connected to the main board by an image sensor flexible printed wiring board held in the optical lens barrel unit, and is processed by a system IC or an image processing IC mounted on the main board.

  A display unit is arranged on the back side of the image pickup apparatus for confirming the subject image. Some display units are attached to the main body of the imaging apparatus so that the display surface can be rotated so that the photographer can easily see the display unit when in use. The signal of the display device is electrically connected to the main substrate on the imaging device main body side. Therefore, in the rotatable display unit, the connection cable between the display device and the main board on the imaging device main body side is housed inside the rotation shaft of the display unit.

  Some imaging apparatuses are equipped with a wireless communication module including an antenna for communicating with an external device. In the imaging apparatus, the arrangement of the wireless communication module should give priority to improving the transmission / reception characteristics as much as possible. Therefore, it is preferable that the wireless communication module is disposed at a location that is not the grip side that the photographer holds at the time of shooting, for example, the side surface opposite to the grip side.

  Units inside the imaging apparatus are optimally arranged for each function. In addition, a plurality of printed wiring boards and connection cables attached to each unit inside the image pickup apparatus need an arrangement place of the extending portion for electrically connecting to the main board inside the image pickup apparatus.

  The arrangement shown in Patent Document 1 has been proposed for the arrangement of a plurality of flexible printed wiring boards and connection cables (see Patent Document 1).

JP2013-251640A

  However, the image pickup apparatus has a plurality of signals that require consideration for noise from the outside, such as an image pickup unit signal and a display device signal. It is not preferable that printed wiring boards and connection cables used for wiring of signals that require noise resistance, such as signals from an image pickup unit and signals from a display device, be arranged so as to overlap with each other. Furthermore, there is a concern of unnecessary radiation by arranging the printed wiring board and the connection cable in an overlapping manner. In addition, image sensor substrates are becoming larger due to the increase in pixels and size of image sensors. Therefore, multiple printed wiring boards and connection cables that are attached to each unit, especially multiple printed wiring boards and connection cables that extend from the unit that is placed on the side opposite to the grip side that the photographer holds during shooting It is difficult to secure a sufficient location for the arrangement.

  In order to solve the above-described problems, the imaging apparatus according to the present invention uses a thin coaxial cable for wiring that is housed in the rotation shaft of the rotatable display unit and connected to the main board. The thin coaxial cable is formed into a flat plate by laminating a portion disposed in parallel with the image sensor flexible printed wiring board held by the optical lens barrel unit with a film. The extended portion of the flexible printed wiring board for connecting to the main board from the wireless communication module is placed on a thin coaxial cable that is laminated with a film to form a flat plate.

  According to the present invention, there is no concern about unnecessary radiation in the internal structure of the imaging apparatus, and it is possible to provide a configuration in which an arrangement space for a printed wiring board extending from a plurality of units and connected to a main board is provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view for explaining an imaging apparatus 10 as an embodiment of the present invention (No. 1). It is a perspective view explaining the imaging device 10 as an Example of this invention (the 2). It is a perspective view explaining the imaging device 10 as an Example of this invention (the 3). It is a perspective view explaining the imaging device 10 as an Example of this invention (the 4). It is an expansion perspective view explaining composition of a main part of image pick-up device 10 in an example of the present invention. It is a figure explaining the structure of the display unit 19 in the Example of this invention (the 1). It is a figure explaining the structure of the display unit 19 in the Example of this invention (the 2). It is a figure explaining the relationship of each printed wiring board in the Example of this invention (the 1). It is a figure explaining the relationship of each printed wiring board in the Example of this invention (the 2). It is a figure explaining the relationship of each printed wiring board in the Example of this invention (the 3). It is a figure explaining the relationship of each printed wiring board in the Example of this invention (the 4). It is a figure explaining the unit state of the side cover 15 in the Example of this invention. It is a figure explaining the detail of arrangement | positioning of the flexible printed wiring board 37 for near field communication in the Example of this invention.

(Example)
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. FIG. 1A is a front perspective view illustrating a configuration of an imaging apparatus 10 as an embodiment of the present invention. As shown in FIG. 1A, an optical lens barrel unit 14 is provided at the front center of the imaging apparatus 10. The imaging device 10 covers the main body of the imaging device 10 with a plurality of exterior covers such as a front cover 16, a rear cover 21, and a side cover 15. On the left side of the optical lens barrel unit 14 in the front cover 16, there is a grip 18 that the photographer grips during photographing.

  FIG. 1B is a rear perspective view illustrating the configuration of the imaging apparatus 10 of the present invention. The imaging device 10 has a power button 11, a release button 12, and a mode dial 13 on the top surface. The display unit 19 can check a captured image, a subject image, various camera settings, and the like. Above the display unit 19 is an eyepiece window 20 of an electronic viewfinder. The display unit 19 constitutes the imaging device 10 so as to be rotatable via the hinge portion 17. In FIG. 1B, the display unit 19 is shown in a state where the display surface is stored facing the imaging apparatus main body.

  FIG. 1C is a perspective view showing a state in which the display unit 19 of the imaging apparatus 10 of the present invention is rotated. The display unit 19 rotates about 180 degrees with respect to the rotation shaft 22. As a result, the display surface 23 faces the photographer. FIG. 1D is a perspective view of a state in which the display unit 19 of the imaging apparatus 10 according to the present invention is rotated 180 degrees with respect to the rotating shaft 24 from the state of FIG. It is. The display surface 23 of the display unit 19 faces the photographer and is stored. In this way, the display unit 19 is rotated about two axes by the hinge 17.

  FIG. 2 is a developed rear perspective view illustrating the configuration of the main body of the imaging apparatus 10 as an embodiment of the present invention. The optical lens barrel unit 14 is in an integrated unit state in which an image sensor flexible printed wiring board 32 and a barrel flexible printed wiring board 33 on which an image sensor (not shown) is mounted are held. The main board 30 on which the system IC, the image processing IC, and the connector for connection are mounted is held by the battery box unit 29 and is an integral unit. The display unit 19 is integrated with the hinge portion 17. A flexible printed wiring board 37 for near field communication is held on the side cover 15. Each unit is fixed to the main sheet metal 31 to constitute a main body.

  FIG. 3A is an exploded perspective view of the display unit 19 as viewed from the opposite side of the display surface 23. A display unit substrate 25 is held inside the display unit 19. A thin coaxial cable 26 is connected to the display unit substrate 25. A thin coaxial cable is a cable having a shield around a central conductor, and is known to be a cable excellent in noise resistance, bendability and twist.

  A connecting portion 26a of the thin coaxial cable 26 to the display unit substrate 25 is divided for each signal line. The thin coaxial cable 26 passes through the first through hole 17 a of the hinge 17 in parallel with the rotation shaft 24. The thin coaxial cable 26 that has passed through the through-hole 17 a of the hinge 17 passes through the second through-hole 17 b of the hinge 17 in parallel with the rotation shaft 22. The thin coaxial cable 26 has a bundle portion 26b so as to pass through the through holes 17a and 17b of the hinge 17.

  FIG. 3B is a perspective view of the display unit 19 viewed from the display surface 23 side. The thin coaxial cable 26 has a laminating portion 26c that is laminated after the bundle portion 26b passes through the through holes 17a and 17b of the hinge 17 to form a flat plate. A connection connector 27 for connecting to the main board 30 is provided at the end of the laminating portion 26c. The display unit 19 is fixed to the image pickup apparatus main body by fastening a hinge base plate 28 constituting the hinge 17 to the image pickup apparatus main body.

  4A to 4D are views for explaining the relationship between the printed wiring boards 2 and cables described in FIG. 2 and FIG.

  FIG. 4A is an exploded perspective view of the rear surface for explaining the arrangement configuration of each printed wiring board. The main substrate 30 is disposed on the grip side of the imaging device 10. The image sensor flexible printed wiring board 32 and the lens barrel flexible printed wiring board 33 are held by an image sensor holder 36 constituting the optical lens barrel unit 14. The thin coaxial cable 26 connected to the display unit substrate 25 passes through the through hole of the hinge 17 and is provided with a laminate portion 26c. The hinge base plate 28 is fastened to the main sheet metal 31 with screws 28a. The laminate portion 26 c is fixed by an adhesive member 31 a provided between the main sheet metal 31. A flexible printed wiring board 37 for short-range wireless communication is held on the side cover 15, and an extending portion 37 b is provided for connection to the main board 30.

  FIG. 4B is an exploded perspective view illustrating the arrangement of the thin coaxial cable 26 in the imaging apparatus 10 of the present invention as seen from the rear surface. The extended portion of the image sensor flexible printed wiring board 32 is connected to the main board 30 by a connection connector 34. Similarly, the lens barrel flexible printed wiring board 33 is connected to the main board 30 by the connection connector 34 at the extending portion. The lens barrel flexible printed wiring board 33 has an extending portion arranged in parallel so as not to overlap the image sensor flexible printed wiring board 32 on projection. Similarly, the laminate portion 26c is arranged in parallel with the extended portion of the image sensor flexible printed wiring board 32.

  FIG. 4C is a perspective view illustrating a state in which the main sheet metal 31 that is the main structure of the imaging device 10 is combined with the state of FIG. The hinge base plate 28 is fastened to the main sheet metal 31. The thin coaxial cable 26 that has passed through the through holes 17a and 17b has a flat laminate portion 26c attached to the main sheet metal 31. The main sheet metal 31 is provided with an index (not shown) in order to ensure the positional accuracy of the laminating portion 26c. The laminating portion 26 c is arranged substantially in parallel so as not to overlap the image sensor flexible printed wiring board 32 and the lens barrel flexible printed wiring board 33. The connection connector 27 connected to the main board 30 is adjacent to the connection connector 34 of the image sensor flexible printed wiring board 32.

  FIG. 4D is a perspective view for explaining the arrangement of the short-range wireless communication flexible printed wiring board 37 having an antenna pattern for wireless communication in the state of FIG. The extended portion of the short-distance wireless communication flexible printed wiring board 37 is fixed on a laminating portion 26 c provided on the thin coaxial cable 26 with an adhesive tape (not shown). The extended portion 37 b of the short-range wireless communication flexible printed wiring board 37 is connected by a connection connector 38 mounted on the main board 30. The connection connector 38 is in a positional relationship parallel to the extending direction of the flexible printed wiring board 37 for short-range wireless communication with respect to the connection connector 27. Since the line coaxial cable has a shield around the center conductor, even if it overlaps with a signal for wireless communication, there is no influence of noise on the signal. In addition, space is saved because it is stacked only on the flat laminate portion 26c.

  FIG. 5 is a diagram illustrating the unit state of the side cover 15. The flexible printed wiring board 37 for near field communication is held by the side cover 15. The short-distance wireless communication flexible printed wiring board 37 has an extended portion 37b. The extending portion 37b is held so as to be accommodated in a concave portion 15a provided in a part of the side cover 15. The antenna pattern portion 37 a provided on the short-range wireless communication flexible printed wiring board 37 is in a positional relationship facing the external side surface portion of the imaging device 10. An external microphone connection terminal 40 is mounted on the short-range wireless communication flexible printed wiring board 37. As with the wireless communication signal, the external microphone connection signal needs to be considered with respect to noise.

  FIG. 6 is a diagram for explaining the details of the arrangement of the flexible printed wiring board 37 for near field communication. A part of the side cover 15 is configured to cover the hinge base 28. A portion of the side cover 15 covering the hinge base 28 has a recess 15a. The recessed portion 15a is a through hole 17a, that is, the short-distance wireless communication flexible printed wiring board 37 disposed immediately below the rotating shaft 24 is held by the side cover 15, and the extending portion to the main board 30 is formed by the recessed portion 15a and the hinge. It passes between the bases 28. Here, the gap between the rotation shaft 24 and the hinge base 28 is a gap necessary for rotation with respect to the rotation shaft 22 and the rotation shaft 24 shown in FIGS. 1 (c) and 1 (d). As shown in FIG. 3A, the bundle portion 26 b of the thin coaxial cable 26 has a lead-out portion in the extending direction of the rotating shaft 22. As a result, disposing the extended portion of the short-range wireless communication flexible printed wiring board 37 in the gap between the recess 15a and the hinge base 28 saves space.

  In this embodiment, the short-distance wireless communication flexible printed wiring board 37 is held and disposed on the side cover 15 on the opposite side of the grip portion 18 of the imaging device 10. For example, the other front cover 16 and the rear cover 21 are arranged. May be held on the bottom surface or the like.

  As described above, according to the present embodiment, the thin coaxial cable 26 having a shield around the center conductor is used for electrical connection from the display unit substrate 25 to the main substrate 30. The thin-coaxial cable 26 is provided with a laminated portion 26c laminated in a flat plate shape, and the flexible printed wiring board 37 for short-distance wireless communication is arranged such that the extending portion 37b up to the main board 30 overlaps the laminated portion 26c. As a result, the flexible printed wiring board 37 for short-range wireless communication is disposed substantially in parallel so as not to overlap the image sensor flexible printed wiring board 32 and the lens barrel flexible printed wiring board 33, and is space-saving and has no fear of unnecessary radiation. In this embodiment, the flexible printed wiring board having the antenna pattern for short-distance wireless communication that can be arranged is used. However, other types of printed wiring boards for wireless communication may be used.

10 imaging device, 15 side cover, 17 hinge, 19 display unit,
26 thin coaxial cable, 26c laminate, 28 hinge base,
30 main board, 32 image sensor flexible printed wiring board,
33 Lens tube flexible printed wiring board,
37 Flexible printed wiring boards for near field communication,
37a Antenna pattern part

Claims (5)

A hinge (17) held in the imaging device main body, a display unit (19) rotatably held via the hinge (17), and a display unit substrate (25) held in the display unit (19) A main board (30) for controlling the image pickup apparatus, a display unit board (25), a thin coaxial cable (26) for electrical connection between the main board (30), and an antenna pattern part (37a). In the imaging device (10) having the flexible printed wiring board (37) for wireless communication electrically connected to the main board (30),
The thin coaxial cable (26) includes a bundle portion (26b) accommodated in a through hole (17a, 17b) provided in the rotation shaft of the hinge (17), and a bundle portion (26b) to the main substrate ( 30) to the main substrate (30) of the flexible printed wiring board (37) for wireless communication on the flat laminate portion (26c) of the thin coaxial cable (26). The image pickup device (10) configured to be fixed by overlapping the extending portions (37b).   An optical lens barrel unit (14), a barrel flexible printed wiring board (33) and an image sensor flexible printed wiring board (32) held by the optical lens barrel unit (14), and an antenna pattern portion (37a) ) And the wireless communication flexible printed wiring board (37) that is electrically connected to the main board (30) are extended to the main board (30) by a lens barrel flexible printed wiring board (33). 2 and the image sensor flexible printed wiring board (32).   The overlapping part of the extension part (37b) of the flexible printed wiring board (37) for wireless communication to the main board (30) and the flat laminate part (26c) provided on the thin coaxial cable (26) is the imaging device (10). The imaging device (10) according to claim 1 or 2, wherein the imaging device (10) is disposed in a gap between the rear cover 21 and the main sheet metal 31.   A flexible printed wiring board for wireless communication (37) having an antenna pattern portion (37a) and electrically connected to the main board (30) is held by the side cover (15), and the flexible printed wiring board for wireless communication The extension part (37b) of the (37) to the main board (30) passes between the recess (15a) provided in the side cover (15) and the hinge base (28) constituting the hinge (17). The imaging device (10) according to claim 1 or 2, characterized in that   The flexible printed wiring board for wireless communication (37) having the antenna pattern portion (37a) and electrically connected to the main board (30) has an external microphone terminal connection terminal (40) mounted thereon. The imaging device (10) according to claim 1 or 2.