JP5548011B2 - Imaging device - Google Patents

Description

The present invention relates to an attitude position detection mechanism for a movable monitor in an imaging apparatus .

  As an example of a conventional imaging apparatus such as a digital camera provided with a liquid crystal display unit (movable monitor) that can be opened and closed, for example, an imaging apparatus disclosed in Patent Document 1 includes a closed state locking mechanism and an open / closed state of the liquid crystal display unit And an open / close detection switch mechanism.

  The open / close lock mechanism and the open / close detection switch mechanism include a magnet disposed in the liquid crystal display unit, a metal plate disposed on the camera body side, and a magnetically sensitive sensor for detecting a locked state.

JP-A-11-155086

  In the imaging apparatus disclosed in Patent Document 1 described above, it is necessary to provide a dedicated magnet as an opening / closing lock mechanism and an opening / closing detection switch mechanism.

The present invention has been made to solve the above-described problem, and an object thereof is to provide an imaging apparatus having a movable monitor posture position detection mechanism with a simpler configuration.

Imaging apparatus of the present invention in order to solve the above problems, has a movable member which is movable inside the imaging apparatus, and the equipment which the movable member that are controlled by using a magnet, to the outside of the imaging device A movable monitor that is movable between a monitor use posture position and a monitor non-use posture position, and for detecting the monitor use posture position and the monitor non-use posture position of the movable monitor based on a change in magnetic flux from the magnet. Magnetic detection means provided on the movable monitor.

According to the present invention, it is possible to provide an imaging apparatus having a movable monitor posture position detection mechanism with a simpler configuration.

The perspective view seen from the back side in the monitor non-use state of the digital camera which is an imaging device as one embodiment of the present invention The perspective view seen from the back side in the monitor use state of the digital camera of FIG. The perspective view which looked at the state which rotated the monitor in the monitor use state of the digital camera of FIG. 1 from the back side 1 is a longitudinal sectional view taken along the optical axis of the photographing lens of the digital camera in FIG. 1 (corresponding to the BB section in FIG. 5). AA sectional view of FIG. DD sectional view of FIG. 5 in a monitor non-use state DD sectional view of FIG. 5 in monitor use state CC sectional view of FIG. 5 in a monitor use state E section enlarged sectional view of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A digital camera (hereinafter referred to as a camera) 1 as an imaging apparatus according to an embodiment of the present invention includes an imaging unit 21 and a camera control circuit unit 9 as shown in FIGS. A detachable camera exterior body 2 and a liquid crystal display frame 6 as a movable monitor device supported on the back surface of the camera exterior body 2 so as to be rotatable about the X and Y axis centers are provided.

  In the camera exterior body 2, the optical axis of the photographic lens to be mounted is O, the subject side is the front, and the imaging side is the rear (or the back side). In addition, a direction perpendicular to the direction of the optical axis O and a vertical direction in a normal photographing posture is defined as a Y direction. Further, the horizontal direction is the X direction, and the left and right sides are shown as viewed from the back side.

  A lens mount 3 to which the photographing lens unit can be attached and detached is disposed on the front surface of the camera exterior body 2. A power switch button 4 and a release button 5 are disposed on the upper surface of the camera exterior body 2. On the back surface of the camera exterior body 2, there is provided a back surface recess 2 b in which the liquid crystal display frame 6 is fitted and stored.

  The imaging unit 21 is an imaging unit with an anti-shake device that is disposed on the optical axis O inside the camera exterior body 2 and includes an attitude position detection mechanism for preventing and reducing the shake of the captured image. The imaging unit 21 is fixed to the camera exterior body 2 along the XY plane, is made of a ferromagnetic material, and includes a rear support plate 22 and a front support plate 23 that also serve as a yoke, and front and rear support plates 23. Are mounted on a movable frame 24 which is a movable member having XY drive coils 31 and 32 and a flexible printed circuit board 29 connected to the camera control unit. In addition, the image sensor 26 held by the movable frame 24 via the image sensor support base 25, the optical filter 27 and the protective glass 28 disposed on the front surface of the image sensor, and the front and rear support plates 23 and 22 are fixed inside. And two sets of magnets 33 and 34 arranged to face the XY drive coils 31 and 32.

  When photographing with the camera 1, the subject image captured through the photographing lens is formed on the light receiving surface of the image sensor 26, and the image signal of the subject image is output from the image sensor 26. When the camera 1 is in the anti-shake mode and a shake of the camera exterior body 2 is detected during shooting exposure, current is supplied to the XY drive coils 31 and 32 based on the shake signal. The XY drive coils 31 and 32 in the magnetic field generated by the magnets 33 and 34 receive a force that displaces in the direction that cancels the shake, and the movable frame 24 that holds the image sensor 26 is displaced in that direction. An image pickup signal in which image blur is reduced by the image pickup element displacement operation is output from the image pickup element 26.

  The liquid crystal display frame 6 includes a monitor unit and includes a posture position detection mechanism. As shown in FIGS. 4 and 6 to 8, one plane side is a monitor display window 8, and the other surface is a frame exterior rear surface 6 a. . A TFT type LCD 13 is arranged inside the monitor display window 8. An LCD substrate 14 is arranged in close contact with the side opposite to the display window of the LCD 13.

  An LCD display control circuit and a Hall element 15 as a magnetic detection means for a magnet 33 for controlling on / off of the LCD 13 are mounted on the LCD substrate 14 and connected to the camera control circuit unit 9 via a flexible printed circuit board. .

  On the surface side of the LCD substrate 14 (that is, the anti-LCD side), the liquid crystal display frame is in a monitor non-use state (FIG. 6) in which monitor observation described later is not performed or a monitor use state in which monitor observation is performed (FIG. 7) When 6 is stored in the back recess 2b of the camera exterior body 2, the hall element 15 is positioned so as to face one magnet 33 disposed inside the camera exterior body 2. However, in the monitor non-use state (FIG. 6), the surface (the non-mounting surface side) 15a of the Hall element 15 is on the back side of the camera, that is, the surface 15a of the Hall element 15 faces back via the LCD 13. is there. In the monitor use state (FIG. 7), the surface 15a of the Hall element 15 is in the state facing the front side, that is, the magnet side. Therefore, in the case where the monitor is not used and the case where the monitor is used, the direction of the magnetic field applied to the Hall element 15 is reversed, and an output signal corresponding to this is output from the Hall element 15.

  On the other hand, the rear support plate 22 inside the camera exterior body 2 is partially paired on the back side at a position facing the Hall element 15 on the back side of the surface holding the magnet 33 as shown in FIG. A protruding bent protrusion 22a is provided. Further, the distal end portion of the bending protrusion 22 a is fitted into the escape portion 2 c of the camera exterior body 2 in order to make it closer to the Hall element 15. As a result, a magnetic circuit is formed in which leakage magnetic flux from the magnet 33 easily reaches the Hall element 15 side from the rear support plate 22 serving as a yoke.

  A support block 7 is rotatably supported by a Y support shaft 11 in the Y direction held at the left end 2a of the back recess 2b of the camera exterior body 2. The left end of the liquid crystal display frame 6 is supported by the support block 7 so as to be rotatable by an X support shaft 12 in the X direction. Accordingly, the liquid crystal display frame 6 can be rotated around the Y support shaft 11 and can be rotated at least at an angle of 180 ° around the X support shaft 12.

  The on / off operation of the LCD 13 with respect to the posture position of the liquid crystal display frame 6 in the camera 1 having the above-described configuration will be described.

  When the camera 1 is in the power switch ON state, the frame exterior rear surface 6a of the liquid crystal display frame 6 is exposed to the surface of the camera exterior body 2 and stored in the rear recess 2b of the camera exterior body 2 as shown in FIGS. In other words, when the liquid crystal display frame 6 is in the monitor non-use posture position with the monitor display window 8 inside, the Hall element 15 has the back surface (mounting surface) of the front surface side 15a via the LCD 13. As described above, an output signal, for example, a negative voltage is output from the hall element 15 because it is positioned opposite to the magnet 33, and the camera control circuit unit 9 keeps the LCD 13 in an off state assuming that monitor observation is not performed.

  As shown in FIGS. 2 and 7, the liquid crystal display frame 6 is rotated around the Y support shaft 11 and the X support shaft 12 so that the surface of the monitor display window 8 is exposed on the back surface, and the rear recess 2b of the camera exterior body 2 is exposed. When the liquid crystal display frame 6 is moved from the back of the camera 1 to a monitor use posture position where the monitor can be observed from the back side of the camera 1, the Hall element 15 has its surface side 15a facing the magnet 33 side as described above. Then, an output signal, for example, a positive voltage is output from the hall element 15, and the camera control circuit unit 9 switches the LCD 13 to the on state.

  As shown in FIG. 3, the liquid crystal display frame 6 is rotated around the Y support shaft 11, opened from the back surface recess 2 b of the camera exterior body 2, and further rotated around the X support shaft 12 to When the monitor is used in such a manner that the monitor can be observed from above and below, the Hall element 15 is naturally separated from the magnet 33, in other words, a position further away from the bending protrusion 22 a of the rear support plate 22. Move to. Accordingly, the output of the Hall element 15 is reduced. Based on the low output signal of the hall element 15, the camera control circuit unit 9 maintains the on state of the LCD 13.

  As described above, according to the camera 1 of the present embodiment, since the LCD 13 is controlled to be turned on and off according to the position of the liquid crystal display frame 6, the camera exterior body is provided without providing a dedicated magnet as a detection magnet for the Hall element 15. The number of parts is reduced by using the magnet 33 of the image pickup unit 21 with an anti-blur device disposed inside.

  Further, in order to make the leakage flux of the magnet 33 easily reach the Hall element 15 side from the rear support plate 22 serving as a yoke, a bent protrusion 22a is provided on the back side at a portion facing the Hall element 15 of the rear support plate 22. Thus, the posture position of the liquid crystal display frame 6 is more reliably detected by the hall element 15.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention at the stage of implementation. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

The imaging apparatus of the present invention can be used as an imaging apparatus having a movable monitor posture position detection mechanism with a simpler configuration.

6. Liquid crystal display frame (movable monitor)
15 ... Hall element (magnetic detection means)
21 ... Imaging unit (device, anti-shake device)
22 ... Rear support plate (ferromagnetic material)
24. Movable frame (movable member)
33 ... Magnet

Claims (3)

In the imaging device,
Has a movable member which is movable inside the imaging apparatus, and the equipment which the movable member that are controlled by using a magnet,
Disposed outside of the imaging device, a movable monitor and a movable and a monitor use position location and monitor non-use position position,
Magnetic detection means provided in the movable monitor for detecting the monitor use posture position and the monitor non-use posture position of the movable monitor by a change in magnetic flux from the magnet;
An imaging apparatus comprising:   The imaging apparatus according to claim 1, wherein the apparatus is an anti-shake apparatus for preventing and reducing blurring of an image captured by the imaging apparatus, and the magnet magnetically drives the movable member.   The imaging apparatus according to claim 1, wherein a ferromagnetic material for forming a magnetic circuit is disposed between the magnet and the magnetic detection unit.

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