JP2020046630A - Display device and imaging apparatus - Google Patents

Abstract

To provide a display device and an imaging apparatus capable of reducing the size while having a dust-proof function.SOLUTION: A diopter adjustment mechanism is provided on a sliding cylinder 32 that moves relative to a fixed cylinder 25. The gap between the fixed cylinder 25 and the sliding cylinder 32 is sealed by a silicone rubber 38 provided on the sliding cylinder 32. An opening 33b for ventilation is formed in a panel cover 33 that supports a display panel 36 and a dust-proof glass 35. At a position farther from the optical axis C than the dust-proof glass 35 and overlapped with the diopter adjustment mechanism when viewed from the optical axis direction, a ventilation sheet 34 is provided to cover the opening 33b of the panel cover 33.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a display device having a dustproof function and an imaging device.

  2. Description of the Related Art Conventionally, an imaging device such as a digital camera and a digital video camera including a display device such as an electronic viewfinder is known. As this type of display device, there is a display device in which a lens barrel is pulled out from a state housed in a housing and used. In this display device, the volume of air inside the housing of the display device may change significantly when the lens barrel is pulled out. When the volume inside the housing changes, air flows in and out of the gap between the components that make up the housing, and the pressure inside the housing is kept substantially equal to the external pressure. Thereby, the movement of the lens barrel by the pull-out operation becomes smooth.

  If an attempt is made to provide such a display device with a dustproof function, the housing of the display device is sealed from the outside, so that the ingress and egress of air are hindered. Therefore, when the lens barrel is pulled out, the internal pressure changes due to a change in the volume inside the housing, and a difference in air pressure between the inside and the outside of the housing occurs. Then, adverse effects such as an excessively heavy operation force of the lens barrel drawer will occur. Therefore, Patent Literature 1 discloses that an internal pressure adjustment mechanism is provided by attaching a water-repellent porous member that allows the passage of air but prevents the passage of moisture to a ventilation hole provided in a housing and functions as a ventilation portion. A display device for realizing the same has been proposed.

JP 2017-223759 A

  However, in the display device of Patent Literature 1, the water-repellent porous member is provided on a dust cover provided on an external portion of the display device. Therefore, there is a problem that the size of the display device increases in the outer shape direction and the size of the main body of the camera increases.

  An object of the present invention is to provide a dustproof function and to reduce the size.

  In order to achieve the above object, the present invention provides a display device, comprising: a first tubular member; a second tubular member that moves relative to the first tubular member; A diopter adjustment mechanism provided on the cylindrical member for adjusting diopter; a sealing member provided on the second cylindrical member for sealing a gap with the first cylindrical member; A panel cover for supporting the panel and the dust-proof glass, wherein the panel cover has an opening at a position farther from the optical axis of the display device than the dust-proof glass and connects the outside and the inside of the display device. The panel cover has air permeability so as to cover the opening at a position farther from the optical axis than the dustproof glass and overlapping the diopter adjustment mechanism when viewed from the optical axis direction. A seat member is provided.

  ADVANTAGE OF THE INVENTION According to this invention, while providing a dustproof function, size reduction can be achieved.

It is a perspective view of an imaging device to which a display is applied. It is a perspective view of an imaging device. It is a perspective view of an imaging device. It is a perspective view in the storage state of a finder unit. It is a perspective view in the state where the finder unit was pulled out. It is an exploded perspective view of a finder unit. It is a longitudinal cross-sectional view in a storage state of a finder unit. It is a longitudinal cross-sectional view in the state where the finder unit was pulled out. It is sectional drawing in the position of the guide bar in the storage state of a finder unit. It is sectional drawing in the position of the ball in the storage state of a finder unit. It is a perspective view of a panel unit. It is the figure which looked at the sliding cylinder and the display panel from + Z side. It is a perspective view of the conventional panel unit.

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

  FIGS. 1, 2 and 3 are perspective views of an imaging device to which a display device according to an embodiment of the present invention is applied. A digital camera 10 is exemplified as this imaging device. The digital camera 10 includes a strobe unit 11, a pop-up unit 12, and a lens barrel unit 13. The pop-up unit 12 is configured to be capable of shifting from a state in which the pop-up unit 12 is stored in the main body of the digital camera 10 (FIG. 1) to a state in which the pop-up unit 12 projects upward from the main body of the digital camera 10 (FIG. 2). By configuring the pop-up unit 12 to be housed in the main body of the digital camera 10, a flat external surface is obtained.

  In the following description, the front-back direction of the digital camera 10 is referred to as a Z direction for convenience. When distinguishing between the front and the rear in the Z direction, the front of the digital camera 10, that is, the lens barrel unit 13 side (subject side) is defined as a minus direction (−Z direction), and the rear is defined as a plus direction (+ Z direction). . Therefore, FIGS. 1 to 3 are perspective views of the digital camera 10 viewed from the −Z side (subject side). The Z direction is parallel to the optical axis (photographing optical axis) direction of the lens barrel unit 13.

  The pop-up unit 12 includes an electronic view finder unit (hereinafter, referred to as a finder unit) 14 (FIG. 3) as a display device. FIGS. 2 and 3 show a state in which the pop-up unit 12 protrudes upward from the main body of the digital camera 10. With the pop-up unit 12 protruding upward, the finder unit 14 is configured to be able to be stored and pulled out of the pop-up unit 12 in the Z direction. The user can shift to the usable “pull-out state” (FIG. 3) by pulling the eyepiece rubber 16 (fourth cylindrical member) exposed on the exterior of the finder unit 14 backward (+ Z direction). is there. In FIG. 2, the finder unit 14 is in a housed state, and in FIG. 3, the finder unit 14 is in an extended state. In the pulled-out state, when the user adjusts the diopter using a diopter adjustment mechanism (described later), the user checks the image displayed on the display panel 36 (FIGS. 6 to 12) provided inside the finder unit 14 without blurring. be able to.

  4 and 5 are perspective views of the finder unit 14 in a housed state and a drawn state. A diopter adjustment lever 28 is provided on the upper surface side of the finder unit 14 (FIG. 5). The diopter adjustment lever 28 is an operation member for adjusting the diopter of the finder unit 14 according to the user's visual acuity. The user can operate the diopter adjustment lever 28 by pulling out the finder unit 14 to bring it out. By configuring the diopter adjustment lever 28 to be operable only in the pulled-out state, it is possible to prevent the diopter setting already adjusted to the user from being changed unintentionally.

  FIG. 6 is an exploded perspective view of the finder unit 14. 7 and 8 are longitudinal sectional views of the finder unit 14 in the housed state and the pulled-out state, respectively. The finder unit 14 has a first lens 22 and a second lens 20. The optical axis of the first lens 22 and the second lens 20 is defined as the optical axis C of the finder unit 14 (FIG. 7). The optical axis directions of the lenses 22 and 20 are substantially parallel to the Z direction. The finder unit 14 has two guide bars 26 and two balls 30 (FIG. 6).

  FIG. 9 is a cross-sectional view at the position of the guide bar 26 when the finder unit 14 is stored. FIG. 10 is a cross-sectional view at the position of the ball 30 in the housed state of the finder unit 14. FIG. 11 is a perspective view of the panel unit 44.

  As shown in FIG. 6, the lens holder 23 (third cylindrical member) is fixedly engaged with the lens cover 19, thereby connecting the first lens 22, the mask 21, and the second lens 20. Hold fixedly. A cam follower 37 is provided on the lens holder 23. A fitting groove for guiding the lens holder 23 straight in the Z direction is provided inside the sliding cylinder 32 (second cylindrical member). A “diopter adjustment mechanism” including a diopter adjustment lever 28, an O-ring 29, and a cam 27 is provided above the sliding cylinder 32 (see FIGS. 7 and 8). A spring 18 for urging the cam follower 37 of the lens holder 23 against the cam 27 is provided. The spring 18 is provided between the eyepiece rubber 16 and the lens holder 23 in a radial direction about the optical axis C. The cam follower 37 is pressed against the cam 27 by the spring 18 urging the lens holder 23 in the −Z direction. When the user moves the diopter adjustment lever 28, the lens holder 23 can be relatively moved in the Z direction (optical axis direction) with respect to the sliding cylinder 32.

  As shown in FIG. 9, holes 46 and 47 for supporting the guide bar 26 are formed in the panel cover 33 (see also FIG. 11). A hole for supporting the guide bar 26 is also formed in the fixed cylinder 25 (first cylindrical member). The guide bar 26 is disposed substantially parallel to the optical axis direction between the fixed cylinder 25 and the panel cover 33 in the optical axis direction, and is supported by the fixed cylinder 25 and the panel cover 33 in a double-supported state. On the outer peripheral portion of the sliding cylinder 32, an overhang portion 41 that protrudes toward the outer peripheral side is formed. The overhang portion 41 has a guide hole 42 through which the guide bar 26 passes. The fixed cylinder 25 and the panel cover 33 are engaged with each other. The sliding barrel 32 is guided by the guide bar 26 and is configured to be relatively movable in the Z direction (optical axis direction) with respect to the fixed barrel 25. Since the sliding cylinder 32 moves with respect to the fixed cylinder 25 along the guide bar 26 fixed at both ends, the sliding cylinder 32 can be accurately moved.

  Further, the sliding cylinder 32 slides on the outer peripheral portion of the sliding cylinder 32 including the overhanging portion 41, which is orthogonal to the optical axis direction, while sealing a gap between the fixed cylinder 25 and the sliding cylinder 32. Silicone rubber 38 (sealing member) is arranged all around. The overhang portion 41 is arranged at the end of the sliding cylinder 32 in the −Z direction. With this arrangement, when the eyepiece rubber 16 is pulled out and pulled out, the entire optical length from the display surface of the display panel 36 to the eyepiece glass 15 can be increased, and the optical performance is improved. The material of the sealing member is not limited as long as it can seal the gap between the fixed cylinder 25 and the sliding cylinder 32.

  As shown in FIG. 10, the fixed cylinder 25 has a ball hole 39 formed therein. Ball grooves 40 (40A, 40B) are formed in the sliding cylinder 32 at two different positions in the optical axis direction. When the ball 30 is fitted in the ball hole 39 and one of the ball grooves 40, the leaf spring 31 urges the ball 30 in a direction orthogonal to the optical axis direction, so that the sliding cylinder 32 with respect to the fixed cylinder 25 is moved. The position in the optical axis direction can be restricted to two stable positions. That is, when the ball 30 is fitted into the ball hole 39 and the ball groove 40A and is urged by the leaf spring 31, the storage state shown in FIG. 10 is regulated. When the ball 30 is fitted into the ball hole 39 and the ball groove 40B and is urged by the leaf spring 31, the ball 30 is restricted to be pulled out.

  The eyepiece rubber 16 and the sliding cylinder 32 are connected by snap fit. When the user pulls out the eyepiece rubber 16 in the + Z direction, the three cylindrical members (the eyepiece rubber 16, the slide barrel 32, and the lens holder 23) move integrally with respect to the fixed barrel 25, and the drawn state ( FIG. 5). The switch 24 shown in FIG. The switch 24 is arranged so as to detect whether the eyepiece rubber 16 is in the housed state or the pulled-out state.

  The eyepiece rubber 16 is provided with an opening for viewing the image displayed on the display panel 36. A transparent eyepiece glass 15 is fixed to the opening of the eyepiece rubber 16 in order to prevent dust from entering from outside and sticking to the lens portion and the like. The panel cover 33 is provided with an opening 33a (FIGS. 7 and 8) for viewing the image displayed on the display panel 36. The display panel 36 is fixedly supported by the panel cover 33. Further, a dust-proof glass 35 is fixed to the opening 33a of the panel cover 33 in order to prevent dust entering from outside from adhering to the surface in the + Z direction of the display panel 36 (FIGS. 7, 8 and 11). ). With such a configuration, the space between the display panel 36 and the eyepiece glass 15 can be sealed so that dust does not enter.

  The panel cover 33 is provided with a ventilation opening 33b that connects the outside and the inside of the finder unit 14 (FIGS. 7 and 8). The opening 33b is covered with the ventilation sheet 34. The gas permeable sheet 34 is a gas permeable sheet member and does not allow particles such as dust larger than 1 μm to pass through. Details of the arrangement of the ventilation sheet 34 will be described later. The reason why the ventilation sheet 34 is provided is to prevent the air containing dust and the like from entering and exiting through minute gaps due to a sudden change in the pressure of the closed space when the user performs a pull-out / storage operation. . The vent formed by the vent sheet 34 alleviates a sudden change in pressure in the closed space.

  As shown in FIG. 11, the panel unit 44 is formed by unitizing the panel cover 33, the dustproof glass 35, and the like. The panel unit 44 mainly has a portion (not shown in FIG. 11) holding the display panel 36 and a convex portion 43 holding the dustproof glass 35. FIG. 12 is a view of the sliding cylinder 32 and the display panel 36 as viewed from the + Z side in the optical axis direction. As shown in FIG. 12, the holes 46 and 47 are located in the projection plane, that is, inside the outer shell 36a of the display panel 36 when viewed from the optical axis direction. Therefore, the two guide bars 26 supported by the holes 46 and 47 are located inside the outer shell 36a when viewed from the optical axis direction. The inner peripheral portion 45 of the sliding cylinder 32 is also located inside the outer shell 36a when viewed from the optical axis direction. These contribute to downsizing in the direction perpendicular to the optical axis direction.

  By the way, when the sliding cylinder 32 moves, a part of the sliding cylinder 32 and a part of the panel cover 33 overlap in the optical axis direction. That is, in the housed state, the sliding cylinder 32 and the convex portion 43 of the panel cover 33 overlap within the range of the length α in the optical axis direction (Z direction) (FIGS. 7 and 10). In other words, when viewed from a direction perpendicular to the optical axis direction, the sliding cylinder 32 and the projection 43 overlap. Since the sliding cylinder 32 is located around the protrusion 43 in the housed state, the finder unit 14 can be reduced in size by the length α. FIG. 13 is a perspective view of a conventional panel unit 144. In the conventional panel unit 144, since the shape of the panel cover 33 around the dustproof glass 35 is flat, the sliding cylinder 32 and the panel cover 33 cannot be arranged so as to overlap in the optical axis direction.

  As shown in FIG. 7, the ventilation opening 33 b of the panel cover 33 is formed at a position farther from the optical axis C than the dustproof glass 35. The ventilation sheet 34 is disposed at a position farther from the optical axis C than the dustproof glass 35 and overlaps with the diopter adjustment mechanism (cam 27, diopter adjustment lever 28, O-ring 29) when viewed from the optical axis direction. . Thus, the area of the ventilation sheet 34 can be increased without increasing the size of the finder unit 14. In particular, the size of the finder unit 14 can be reduced in the direction orthogonal to the optical axis C.

  The ventilation sheet 34 is attached to the panel cover 33 so as to cover the opening 33b from the side where the dustproof glass 35 is located in the optical axis direction. Compared with the case where the display sheet 36 is attached to the ventilation sheet 34 from the opposite side, that is, the area where the ventilation sheet 34 and the display panel 36 overlap each other when viewed from the optical axis direction (FIG. 7). Only a large area for disposing the ventilation sheet 34 can be ensured. The ventilation sheet 34 overlaps the display panel 36 when viewed from the optical axis direction. The ventilation sheet 34 is located between the holes 46 and 47 in the direction perpendicular to the optical axis direction, and thus between the two guide bars 26 (FIG. 11). Thus, the space is effectively used, and the size is reduced in the direction orthogonal to the optical axis C.

  As described above, the ventilation sheet 34 is arranged outside the projection 43 with respect to the optical axis C, and is therefore arranged in the panel cover 33 in a range that can overlap the sliding cylinder 32 in the optical axis direction. Further, the ventilation sheet 34 is arranged at a position outside the projection 43 and facing the overhang 41 (FIGS. 7, 8 and 11). Further, the ventilation sheet 34 is disposed perpendicular to the optical axis direction which is the moving direction of the sliding cylinder 32. These contribute to shortening of the finder unit 14 in the optical axis direction.

  The ventilation sheet 34 is attached to a surface of the panel cover 33 that is perpendicular to the moving direction at the time of the pulling-out / storing operation, and thus has a structure that allows easy ventilation.

  According to the present embodiment, the ventilation sheet is provided at a position farther from the optical axis C than the dustproof glass 35 and at a position overlapping the diopter adjustment mechanism when viewed from the optical axis direction so as to cover the opening 33b of the panel cover 33. 34 are provided. Thus, the finder unit 14 is provided with a dustproof function, and the size of the finder unit 14 and the body of the digital camera 10 can be reduced.

  Note that the electronic device to which the display device of the present invention is applied is not limited to an imaging device. Even when the display device of the present invention is applied to an imaging device, the imaging device is not limited to the digital camera 10, but may be a digital video camera. Further, the display device may be separate from a device such as a camera, or may be configured integrally.

  As described above, the present invention has been described in detail based on the preferred embodiments. However, the present invention is not limited to these specific embodiments, and various forms that do not depart from the gist of the present invention are also included in the present invention. included.

14 Finder unit 25 Fixed cylinder 28 Diopter adjustment lever 32 Sliding cylinder 33 Panel cover 33b Opening 34 Vent sheet 38 Silicone rubber

Claims (10)

A display device,
A first tubular member;
A second tubular member that moves relative to the first tubular member,
A diopter adjustment mechanism provided on the second cylindrical member for adjusting diopter;
A sealing member provided on the second cylindrical member, for sealing a gap with the first cylindrical member;
A display panel and a panel cover that supports the dust-proof glass,
The panel cover has an opening connecting the outside and the inside of the display device at a position farther from the optical axis of the display device than the dustproof glass,
The panel cover has a breathable sheet member at a position farther from the optical axis than the dust-proof glass and overlapping the diopter adjustment mechanism when viewed from the optical axis direction so as to cover the opening. A display device, comprising: When the second cylindrical member moves, a part of the second cylindrical member and a part of the panel cover overlap in the optical axis direction,
2. The display device according to claim 1, wherein the sheet member is arranged in the panel cover in a range that can overlap the second tubular member in the optical axis direction. 3.   The display device according to claim 1, wherein the sheet member is disposed so as to face the second tubular member in the optical axis direction.   The display device according to claim 1, wherein the sheet member is arranged perpendicular to a moving direction of the second tubular member.   5. The sheet member according to claim 1, wherein the sheet member is attached to the panel cover so as to cover the opening from a side where the dust-proof glass is located in the optical axis direction. 6. Display device.   The display device according to claim 1, wherein the sheet member is disposed so as to overlap the display panel when viewed from the optical axis direction. It has two guide bars for guiding the movement of the second cylindrical member,
The display device according to claim 1, wherein the sheet member is disposed between the two guide bars.   8. The display device according to claim 1, wherein an inner peripheral portion of the second tubular member fits inside an outer periphery of the display panel when viewed from the optical axis direction. 9. The second cylindrical member relatively moves inside the first cylindrical member,
The said 2nd cylindrical member has the overhang | projection part which protruded to the outer peripheral side, The said sealing member was arrange | positioned at the said overhang | projection part, The Claim 1 characterized by the above-mentioned. The display device according to claim 1.   An imaging device comprising the display device according to claim 1.