JP2018107556A - Finder device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a finder device which realizes a mirror dew condensation prevention structure with a small number of components while radiating heat from the interior of the device as dew condensation is caused on a mirror in the finder device by a temperature difference between the interior and the exterior of the device at a cold area.SOLUTION: A finder device has: a display part; a mirror which reflects an image displayed on the display part; a holding member which holds the mirror; an electric element; and an elastic heat transmission member. The elastic heat transmission member contacts with the electric element and the holding member. The holding member and a non-contact surface of the mirror contact with each other.SELECTED DRAWING: Figure 6b

Description

  The present invention relates to a finder device that guides a subject image to a pupil through a mirror, and is suitable for preventing condensation on the mirror.

  Some viewfinder devices guide a moving image or a still image displayed on a display unit such as an LCD to a user's pupil through a mirror. When such a finder apparatus is used in a cold region, it is known that a dew condensation phenomenon occurs in which water vapor heated in the finder adheres to the mirror surface. This dew condensation phenomenon may reduce the visibility of the viewfinder.

  In the field of image pickup devices, Patent Document 1 discloses a technique for preventing dew condensation on a lens by sending heat to the lens by an air guide path connected to a pump. . Further, Patent Document 2 discloses a technology that serves both as heat dissipation of the individual imaging device and prevention of dew condensation on the lens surface by sending heat generated by the individual imaging device to the lens via a heat radiating plate and a heat conducting member.

JP 2007-103998 A JP-A-8-9208

  When the technique disclosed in Patent Document 1 is applied to a finder device, a dedicated pump and an air guide path are required to send warm air to the mirror, which is not a preferable configuration from the viewpoint of the number of parts. Also, in Patent Document 2, since a plurality of members dedicated to heat conduction are provided from the heat source to the mirror, the configuration is not suitable from the viewpoint of the number of parts. Therefore, there is a need for a technique for dissipating heat from the heat source with a small number of parts and preventing condensation on the mirror.

  The finder apparatus of the present invention includes a display unit, a mirror that reflects an image displayed on the display unit, a holding member that holds the mirror, an electric element, and an elastic heat transfer member, and the elastic heat transfer member Is in contact with the electric element and the holding member, and the holding member and the non-reflecting surface of the mirror are in contact with each other.

  With the above configuration, there is an effect that heat from the heat generation source can be dissipated with a small number of parts and condensation of the mirror can be prevented.

FIG. The top view of an imaging device. The perspective view of an imaging device at the time of low angle photography. The perspective view of an imaging device at the time of high angle photography. The finder apparatus front perspective view. FIG. FIG. The loupe part open state perspective view. FIG. Panel unit top view. Panel unit sectional drawing. FIG. Panel unit front view. Mirror fixing explanatory diagram. FIG.

<First Embodiment>
FIG. 1A is a perspective view of the imaging apparatus 1 according to the present embodiment. The directions indicated by the arrows in FIG. 1A are defined as the X direction, the Y direction, and the Z direction in the following text. Further, in each element of the finder 2 in each drawing, the + Z direction side surface shown in FIG. The front side and the −Y side surface are referred to as the back side.

(Explanation of FIGS. 1A, 1B, 1C, and 1D)
The positional relationship between the finder 2 and the imaging device 1 will be described with reference to FIGS. 1A, 1B, 1C, and 1D. As shown in FIG. 1A, the finder 2 is attached to the upper surface of the imaging device 1 via the finder attachment portion 3 and the handle 4.

  FIG. 1B is a top view of the imaging apparatus 1. Since the handle side attaching portion 5 extending from the handle 4 and the X direction rail portion 6 of the finder attaching portion 3 are engaged so as to be able to translate in the ± X direction, a plurality of the finder 2 is provided in the ± X direction with respect to the imaging device 1. The position can be taken. Further, by rotating the handle side tightening portion 7 attached to the handle 4, the finder 2 can be fixed to an arbitrary position in the X direction with respect to the imaging apparatus 1. Since the finder side front mounting portion 8 and the Y direction rail portion 9 are engaged so as to be able to translate, the finder 2 can take a plurality of positions in the ± Y direction with respect to the imaging device 1.

  In addition, the finder 2 can be fixed to an arbitrary position in the Y direction with respect to the imaging apparatus 1 by rotating the finder side front tightening portion 10. Further, between the finder side front attachment portion 8 and the attachment arm portion 11 and between the finder side rear attachment portion 12 and the attachment arm portion 11, 1 (not shown) that can rotate around an axis parallel to the X axis. A shaft torque hinge is incorporated. With this configuration, the finder 2 can change the angle with respect to the main body on the YZ plane around an axis parallel to the X axis.

  A plurality of positions can be taken in the Y-axis and Z-axis directions. The movement of the torque hinge can be restricted by tightening the finder side front tightening portion 10 and the finder side rear tightening portion 13. As described above, the finder 2 of the present embodiment can change the position in the X direction, the Y direction, and the Z direction with respect to the imaging apparatus 1. Further, the angle with respect to the imaging device 1 can be changed around an axis parallel to the X axis.

  An example in which the relative postures of the imaging device 1 and the viewfinder 2 change will be described with reference to FIG. 1C and FIG. FIG. 1C shows the relationship between the imaging device 1 and the finder 2 when the subject is at a low position. In this case, the user looks into the finder 2 from above. FIG. 1D shows the relationship between the imaging device 1 and the viewfinder 2 when the subject is at a high position. In this case, the user looks into the finder 2 from below. Thus, the user can use the imaging device 1 by changing the relative postures of the finder 2 and the imaging device 1 according to the shooting mode.

(Description of FIG. 2 (a), FIG. 2 (b), FIG. 3, FIG. 4 and FIG. 5)
The outline of the finder 2 will be described with reference to FIGS. 2 (a), 2 (b), 3, 4, and 5. FIG. 2A is a front perspective view of the finder 2. The finder 2 includes a panel unit 31 including a panel 24 described later and a loupe unit 29 including a lens group described later. The viewfinder 2 has an eye cup 14 for the user to touch, a diopter adjustment operation unit 15 for adjusting diopter, a push button type menu key 16, a push button type cancel key 17, and a cursor in the menu mode. A moving cross key 18 is provided. The cross key 18 can be pressed as well as selecting four directions.

  FIG. 2B is a rear perspective view of the finder 2. The finder 2 includes three dial keys 19a, 19b, 19c, four toggle keys 20a, 20b, 20c, 20d, and a dial key protector 21. The finder 2 receives the video signal and the tally signal from the image pickup apparatus 1, and the main body connection jack 22 for inserting a cable for sending the input signal from the keys to the image pickup apparatus 1. When the tally lamp is turned on at the time of shooting. Further, an LED window 23 that transmits light such as an LED (not shown) to the outside is provided.

  FIG. 3 is a view in which the exterior member is removed from FIG. The broken lines in FIG. 3 are an optical path 25 a and an optical path 25 b of light emitted from the center of the panel 24. The light emitted from the panel 24 is bent 90 degrees by the mirror 26 with the X axis and the parallel axis being stopped, passes through the fixed lens 27, the movable lens 28a, and the movable lens 28b in this order, and is guided to the user's pupil. The movable lens 28a and the movable lens 28b can take a plurality of positions in the ± Y direction in conjunction with the movement of the diopter adjustment operation unit 15 in FIG. In FIG. 3, the menu key 16, the cancel key 17, the cross key 18, the panel 24, and the mirror 26 are disposed in the panel unit 31 described above.

  Further, the fixed lens 27, the movable lens 28a, and the movable lens 28b are disposed in the loupe portion 29 described above. Here, a direction toward the mirror 26 in the optical path 25b is referred to as a viewing direction. Regardless of whether the loupe unit 29 is flipped up or detached, the user looks into the viewing direction that is constant with respect to the panel unit 31. In the finder 2, the cross key 18 is arranged in the viewing direction.

  FIG. 4 is a view showing a state in which the loupe portion 29 of the finder 2 is flipped up substantially vertically around the torque hinge 30. By taking this form, the user can view an image (not shown) displayed on the panel 24 reflected by the mirror 26 without using a lens. Further, the loupe portion 29 that is flipped up as shown in FIG. In addition, the panel unit 31 in the present embodiment is configured by four metal exteriors including an exterior member 32, an exterior member 33, an exterior member 34, and an exterior member 35.

(Description of FIG. 6A, FIG. 6B, FIG. 6C, and FIG. 7)
The heat dissipation structure of the panel unit 31 and the dew condensation prevention structure of the mirror 26 will be described with reference to FIGS. 6A, 6B, 6C, and 7. FIG. FIG. 6A is a view of the panel unit 31 of the finder 2 as viewed from above. FIG. 6B is a cross-sectional view taken along the line AA in FIG. FIG. 6C is an exploded perspective view of the panel unit 31.

  In FIG. 6B and FIG. 6C, the panel 24 and the backlight 36 are held by a panel holder 37. An elastic member 38, an elastic member 56, and a conductive elastic member 39 are installed between the non-illuminated surface side of the backlight 36 and the exterior member 34, and urge the panel 24 and the backlight 36 toward the panel holder 37. ing. Further, the surface of the panel holder 37 opposite to the surface on which the panel 24 is held is fixed to the exterior member 32. A transparent panel protection plate 40 is attached to a part of the surface of the panel holder 37 that does not contact the exterior member 32.

  The non-reflective surface 26b of the mirror 26 is in contact with the exterior member 32. The reflective surface 26a of the mirror 26 is fixed to the exterior member 32 via the upper elastic member 41 and the upper sheet metal 42, and the lower elastic member 43 and the lower side. It is fixed to the exterior member 32 via a sheet metal 44. As a method for fixing the exterior member 32 and the mirror 26, a configuration may be adopted in which the mirror 26 is attached to the exterior member 32 with a double-sided tape. The mirror 26 and the panel 24 are arranged at different angles on the YZ plane. In the image processing element 45, image processing for displaying the video signal sent from the imaging device 1 as an image (not shown) on the panel 24 is performed.

  The substrate 46 on which the image processing element 45 is mounted is fastened to the opposite side of the exterior member 32 where the mirror 26 is in contact. Further, a heat conductive elastic member 47 is disposed between the image processing element 45 and the exterior member 32. The panel 24 and the substrate 46 are connected by a flexible substrate 48. The backlight 36 and the substrate 46 are connected by a flexible substrate 49.

  The heat generated by the image processing element 45 is transmitted to the non-reflecting surface of the mirror 26 via the heat conductive elastic member 47 and the exterior member 32, whereby the mirror 26 is warmed. Accordingly, even when the finder 2 is used in a cold region, the mirror 26 is heated from the internal temperature of the panel unit 31, so that there is an effect of preventing the mirror 26 from condensing. In this embodiment, the heat generated by the image processing element 45 is used to prevent condensation, but the heat of the heat generating elements other than the image processing element 45 can also be used for prevention of condensation.

  Further, as shown in FIG. 6C, the image processing element 45 and the heat conductive elastic member 47 are arranged at the approximate center of the mirror 26 in the direction of the mirror 26, so that the heat generated by the image processing element 45 is externally provided. Since it diffuses substantially evenly across the member 32, the exterior member 34, the exterior member 35, and the exterior member 33 (not shown), there is an effect that it is difficult to locally create a hot place on the exterior side of the panel unit 31.

  Further, in the configuration of the present embodiment, the substrate 46 on which the image processing element 45 is mounted is disposed on the −Y side surface of the exterior member 32, not on the Z side than the backlight 36. Depending on the position of the substrate 46, when the user of the finder 2 takes his / her eye off the finder 2 and tries to confirm the subject directly from above the finder 2, the P region in FIG. Thereby, there is an effect that the user can secure a large field of view.

(Explanation of FIGS. 7, 8, and 9)
A method for fixing the mirror 26 to the exterior member 32 will be described with reference to FIGS. 7, 8, and 9. In FIG. 8, the non-reflecting surface 26 b of the mirror 26 is in contact with the exterior member 32. The reflection surface 26 a -Z end side is fixed to the exterior member 32 from the Y direction via the lower elastic member 43 and the lower sheet metal 44.

  The reflection surface 26 a + Z end side is fixed to the exterior member 32 from the Y direction via the upper elastic member 41 and the upper sheet metal 42. Here, the lower elastic member 43, the lower metal plate 44, the upper elastic member 41, and the upper metal plate 42 are arranged at positions that do not exceed the side surface 50 of the mirror 26 in the + X direction. The side surface 51 of the mirror 26 is in contact with the convex portion 52 and the convex portion 53 of the exterior member 32 in the X direction. The side surface 50 is fixed to the exterior member 32 via the elastic member 54 and the exterior member 33.

  Here, the elastic member 54 is disposed at a position where the mirror 26, the exterior member 32, and the exterior member 33 can be simultaneously urged. The mirror 26 is disposed between the recess 55 and the surface 57 of the exterior member 32 with respect to the mirror 26 surface direction. When the mirror 26 is assembled to the exterior member 32, the mirror 26 is slid between the concave portion 55 and the surface 57 from the −X direction side and inserted in the + X direction until it contacts the convex portion 52 and the convex portion 53. .

  The lower elastic member 43, the lower sheet metal 44, the lower elastic member 43, and the upper sheet metal 42 are arranged at positions not exceeding the side surface of the mirror 26 in the + X direction. When looking through the viewfinder 2 and trying to confirm the subject with the left eye, the area Q is widened, so that there is an effect that a large field of view can be secured.

  The exterior member 32 and the exterior member 33 are manufactured using a mold. Therefore, if the exterior member 32 and the exterior member 33 are integrated, draft angles are required in the Z direction and the X direction, and the exterior member 32 and the exterior member 33 are enlarged to an optically unnecessary portion. There is a need. By separating the exterior member 32 and the exterior member 33, the release direction of the exterior member 32 and the exterior member 33 can be changed to the Y direction. The panel unit 31 can be made smaller in the + Y direction than when the exterior member 32 and the exterior member 33 are integrated into one. In FIG. 7, when the user of the finder 2 tries to confirm the subject with the left eye while looking through the finder 2 with the right eye, the area Q in FIG.

  Further, the elastic member 54 can urge the mirror 26, the exterior member 33, and the exterior member 34 at the same time, so that only the elastic member 54 prevents light leakage between the exterior member 32 and the exterior member 33, and the exterior Dust and drip-proof performance between the member 32 and the exterior member 33 is improved. At the same time, the mirror 26 can be positioned in the X direction with respect to the exterior member 32.

  The present invention has been described in detail on the basis of the preferred embodiments thereof, but the present invention is not limited to these embodiments, and various forms within the scope of the present invention are not limited thereto. include. A part of the above-described embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 ... Imaging device 2 ... Funda 3 ... Finder attachment part 4 ... Handle 5 ... Handle side attachment part 6 ... X direction rail part 7 ... Handle side tightening part 8 ... Finder side front attachment part 9 ... ··· Y-direction rail portion ································································································································ Menu key 17 Cancel key 18 Cross key 19a Dial key 19b Dial key 19c Dial key 20a Toggle key 20b Toggle key 20c Toggle key 20d Toggle key 21 Dial key protection Section 22 Main unit connection jack 23 LED window 24 Panel 25a Optical path 25b Optical path 26 Optical path 26 Mirror 26a ... Reflective surface 26b ... Non-reflective surface 27 ... Fixed lens 28a ... Movable lens 28b ... Movable lens 29 ... Loupe part 30 ... Torque hinge 31 ... Panel unit 32 ... Exterior member 33 ... ... exterior member 34 ... exterior member 35 ... exterior member 36 ... backlight 37 ... panel holder 38 ... elastic member 39 ... conductive elastic member 40 ... panel protection plate 41 ... upper elastic member 42 ... Upper metal plate 43 Lower elastic member 44 Lower metal plate 45 Image processing element 46 Substrate 47 Thermal conductive elastic member 48 Flexible substrate 49 Flexible substrate 50 Side 51 Side surface 52 ... convex part 53 ... convex part 54 ... elastic member 55 ... concave part 56 ... elastic member 57 ... surface

Claims (7)

  A display unit; a mirror that reflects an image displayed on the display unit; a holding member that holds the mirror; an electric element; and an elastic heat transfer member, wherein the elastic heat transfer member includes the electric element and the holding unit. A finder device, wherein the holding member and a non-reflective surface of the mirror are in contact with each other. A display unit; a mirror that reflects an image displayed on the display unit; a holding member that holds the mirror; an electric element; an elastic heat transfer member; and a double-sided adhesive member. A finder device, wherein the finder device is in contact with an element and the holding member, and the non-reflective surface of the holding member and the mirror are connected via a double-sided adhesive member.   The finder apparatus according to claim 1, wherein the electric element is an image processing element that controls the image.   The viewfinder device according to claim 1, wherein the image pickup device is positioned at a center of the mirror in a reflection surface projection direction of the mirror.   The finder device according to claim 1, wherein the holding member is a part of an appearance of the finder device according to claim 1. A display unit, a mirror that reflects an image displayed on the display unit, a holding member that holds the mirror, a first exterior member that covers a second side surface of the mirror, and an elastic member, The holding member has a contact surface with the first side surface of the mirror, the elastic member is located between the holding member and the first exterior member, and the first exterior member and the mirror The finder device is located between the second side surfaces of the finder. The second elastic member, the third elastic member, the second elastic member, and the third elastic member that are in contact with the reflecting surface of the mirror, and the first fastening portion, A first pressing member and a second pressing member that are respectively fastened by two fastening portions, a direction connecting the first fastening portion and the second fastening portion, and the first elastic member and the The viewfinder device according to claim 6, wherein a direction in which the contact portions are connected is orthogonal.