JP3026064U - Display device outside viewfinder of camera - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a display device outside the viewfinder of a camera, in which the installation space of a light emitter can be made as small as possible without increasing the number of parts and the degree of freedom in design can be increased. [Structure] Outside the eyepiece of the viewfinder of the camera 11,
In a display device outside a viewfinder of a camera provided with a light emitting window 21 of an LED 29, a reflecting surface 23c is provided on an eyepiece lens 23 of the viewfinder so as to be located outside the effective light ray region, and a luminous flux L of the LED 29 is provided through the reflecting surface 23c. To the light emitting window 21.

Description

[Detailed description of the device]

[0001]

[Technical Field of Device]

 The present invention relates to a camera outside viewfinder display device having a light emitting window of a light emitter provided outside an eyepiece of a viewfinder of a camera.

[0002]

[Prior art and its problems]

 As a display device outside the viewfinder of a camera, there is known a device in which an LED is fixed to the outside of a lens frame holding an eyepiece lens so that a light emitting window can be projected toward a light emitting window formed on the outside of the eyepiece lens in a camera body (camera cover). Has been.

In such a display device outside the viewfinder, the LED is fixed to the outer side surface of the lens frame of the eyepiece lens or the camera body side, and further, when it is necessary to tilt the LED due to a space problem, The LED is fixed to the bracket part provided on the outer surface of the lens frame, or the light of the LED is guided to the light emitting window by using a light guide such as a prism. For this reason, there are disadvantages that a large space is required for arranging the LEDs in a desired state, the device becomes large, the number of parts increases, and the cost increases.

[0004]

[The purpose of the device]

 The present invention is based on the above-mentioned problems in the conventional out-of-view display device, and the out-of-view display of a camera that does not increase the number of parts, minimizes the installation space of the light emitter, and increases the degree of design freedom. The purpose is to provide a device.

[0005]

[Outline of the device]

 The present invention for achieving the above object is effective for an eyepiece lens of a finder in a display device outside a viewfinder of a camera in which a light emitting window of a light emitting body such as an LED is provided outside an eyepiece portion of a viewfinder of the camera. It is characterized in that a reflecting surface is provided outside the light ray region, and the light of the light emitting body is guided to the light emitting window through the reflecting surface.

The present invention also relates to a camera frame having a lens frame for supporting an eyepiece lens at the rearmost side of the viewfinder; a viewfinder window located behind the lens frame, and a light emitting window outside the viewfinder window; A light-emitting body arranged in a recess formed in the frame; and a light-emitting body formed in the eyepiece lens itself, which is located outside the effective light ray region of the rearmost eyepiece, guides light from the light-emitting body to a light-emitting window. It features a reflective surface.

[0007]

[Embodiment of device]

 The present invention will be described below with reference to illustrated embodiments. FIG. 3 is a rear view showing a compact camera equipped with the display device outside the viewfinder according to the present invention. In the figure, the camera 11 has a shutter button 12 on the upper right side, and a rear cover 13 which is openably and closably supported, a finder eyepiece window (finder window) 15, and a zoom lens (not shown) on the rear side. It has a zoom lever 16 for moving back and forth in the axial direction. The shutter button 12 is configured so that it can be pressed in two steps. When the shutter button 12 is half-pressed, distance measurement is performed by an AF device (not shown) to bring it into a focusable state, and when the button is fully pressed, the focus adjustment lens ( (Not shown) to the in-focus position and the shutter mechanism.

The camera 11 has a projecting portion (camera cover) 19 which is formed by projecting a rear decoration portion of the camera body rearward, and the projecting portion 19 is provided with the outside viewfinder display device 17 according to the present invention. As shown in FIG. 1, the display device outside the viewfinder 17 includes, on the protruding portion 19, the viewfinder eyepiece window 15 located behind the lens frame 26, and a light emitting window 21 provided outside the eyepiece window 15. It has the eyepiece window 15 and the transparent plate 22 fitted to the rear side of the light emitting window 21. The transparent plate 22 has a surface other than the portion functioning as the finder eyepiece window 15 and the portion facing the light emitting window 21 shielded by paint or the like. When the light is emitted from the inner side of the viewfinder eyepiece window 15, the lighting mark visible on the light emitting window 21 through the transparent plate 22 indicates that the shutter button 12 has been pushed further into the in-focus state. It is a possible mark.

A lens frame 26 that supports the rearmost eyepiece lens 23 in the optical system of the finder is disposed in the inner space of the protrusion 19. The lens frame 26 has an engaging recess 24 and a storage recess 25 that respectively support different parts of the outer peripheral edge of the eyepiece lens 23. A convex portion 23 a formed integrally with the outer peripheral edge portion of the eyepiece lens 23 is engaged with the engaging concave portion 24. Further, in the storage recess 25, a projection 23b formed integrally with the outer peripheral edge portion (edge surface) of the eyepiece lens 23 is inserted. The eyepiece lens 23 can be made of a synthetic resin material, for example, optical plastic PMMA. In this case, the convex portion 23b is integrally formed with the lens 23 at the time of injection molding. Needless to say, the eyepiece lens 23 can be made of optical glass.

The storage recess 25 has a projection 23 b larger than the projection 23 a and an LED 29, which is a light emitting body, for storing the recessed portion 25. The storage recess 25 has a passage hole 25a facing the light emitting window 21 through which the projection 23b is inserted and the light from the LED 29 is passed toward the light emitting window 21. A flexible printed circuit board 27 is fixed to the outer peripheral portion of the lens frame 26, and a storage hole 25 is provided with a communication hole 25b communicating with the passage hole 25a into which the LED 29 fixed to the printed circuit board 27 is inserted. There is. The communication hole 25b is substantially orthogonal to the communication hole 25a.

The convex portion 23b of the eyepiece lens 23 is a portion which is integrally injection-molded with the lens 23, and is projected from the LED 29 toward the center of the lens on the outer surface of the convex portion 23b, that is, the outer surface of the edge surface. A reflecting surface 23 c that reflects the reflected light (light flux L) and guides it to the light emitting window 21 is formed. The reflecting surface 23c formed on the eyepiece lens 23 itself is located outside the effective light ray area of the rearmost eyepiece lens 23 of the finder (the area through which the normal ray reaching the finder eyepiece window 15 passes). The reflecting surface 23c is formed by depositing metal on an inclined surface formed on the convex portion 23b and having a predetermined angle. This metal vapor deposition is for preventing the inconvenience that the light flux L from the LED 29 enters the eyepiece lens 23. The symbol O in FIG. 1 indicates the optical axis of the eyepiece lens 23.

The out-of-viewfinder display device 17 having the above-described configuration functions as follows. That is, when the shutter button 12 is pushed down one step to bring the image into a focusable state, the LED 29 is turned on by a signal from a control unit (not shown). Then, the light flux L from the LED 29 reaches the convex portion 23b of the eyepiece lens 23 through the communicating hole 25b, is reflected by the reflecting surface 23c, and then passes through the passing hole 25a toward the light emitting window 21. 21 is projected to the rear of the viewfinder eyepiece window 15.

Therefore, the photographer (observer) can see the focusable mark illuminated in the light emitting window 21 while observing the viewfinder image of the subject through the viewfinder eyepiece window 15. When the photographer further presses the shutter button 12 after confirming the in-focus mark, the focus adjustment lens moves to the in-focus position, the shutter mechanism is driven, and the image is taken.

Here, a comparative example with respect to the display device outside the viewfinder 17 will be described with reference to FIG. In the outside viewfinder display device 17 'shown in the figure, the lens frame 26 has an engagement concave portion 24 on its inner circumference, and the eyepiece lens 30 has a convex portion 23a on its outer peripheral edge portion that engages with this engagement concave portion 24. have. A bracket portion 26a extending outward is formed on the outer side of the lens frame 26, and a flexible printed circuit board 27 having an LED 29 is fixed to the bracket portion 26a with the LED 29 facing the light emitting window 21. ing.

According to the outside viewfinder display device 17 ′ having such a configuration, the bracket portion 26 a is required to arrange the LED 29 in a desired state. Since the bracket portion 26a requires a large amount of space on the outer peripheral portion of the lens frame 26, the outside viewfinder display device 17 'is upsized.

On the other hand, according to the outside viewfinder display device 17 of the present invention, the LED 29 is housed in the housing recess 25 provided in the lens frame 26, and in the housing recess 25, the reflection provided on the eyepiece lens 23 itself. Since the light beam L is reflected by the surface 23c and guided to the observer side, the installation space of the LED 29 can be minimized and the degree of freedom in design can be increased. Further, since there is no need for a light guide such as a prism for guiding the light of the LED 29 to the light emitting window 21, there is no inconvenience such as an increase in the number of parts and an increase in cost.

Next, a second embodiment of the display device outside the finder according to the present invention will be described with reference to FIG. Compared with the first embodiment, the outside viewfinder display device according to the second embodiment has a shape of a storage recess provided in the lens frame 26 and an outer peripheral edge portion of an eyepiece lens inserted into the storage recess. Although different, the other parts are configured the same.

That is, in FIG. 2, the outside viewfinder display device 17 of the second embodiment has an eyepiece lens 30 having a convex portion 30a having the same shape as the convex portion 23a of the eyepiece lens 23 of the first embodiment. The convex portion 30a is engaged with the engaging concave portion 24, and a parallel flat surface portion (extension portion) 30b having a shape different from that of the convex portion 23b is provided at a portion corresponding to the convex portion 23b. The eyepiece lens 30 can be made of a synthetic resin material, for example, optical plastic PMMA, in which case the plane-parallel portion 30b is integrally formed with the lens 30 during injection molding. It goes without saying that the eyepiece lens 30 can also be made of optical glass.

The parallel flat surface portion 30 b is a portion to be inserted into the storage recess 31 provided in the lens frame 26, and is formed substantially parallel to the optical axis O of the eyepiece lens 23. The plane-parallel portion 30 b has a light transmitting portion 30 c on the surface facing the LED 29, which allows the light flux L from the LED 29 to enter. An inclined surface is provided on the parallel plane portion 30b closer to the optical axis O than the light transmitting portion 30c, and the inner surface of the inclined surface is a reflection that totally reflects the light flux L incident from the light transmitting portion 30c toward the light emitting window 21. The surface (total reflection surface) 30d is configured. The reflecting surface 30d is inclined so that the incident angle θ becomes an angle equal to or larger than the critical angle (for example, 42.09 ° in the case of optical plastic PMMA). When the reflecting surface 30d is formed as a reflecting surface having an incident angle θ of less than the critical angle, metal vapor deposition or the like may be applied to the outer surface of the reflecting surface 30d.

The storage recess 31 formed in the lens frame 26 and into which the parallel flat surface portion 30b is inserted has a groove portion 31a that stores the entire parallel flat surface portion 30b and a communication hole 31b that is substantially orthogonal to the groove portion 31a. ing. A flexible printed circuit board 27 is fixed to the outer peripheral portion of the lens frame 26, and the LED 29 fixed to the printed circuit board 27 is housed in the communication hole 31b so as to face the reflective surface 30d.

In this way, the LED 29 is housed in the housing recess 31 provided in the lens frame 26, and the light flux L is reflected by the reflecting surface 30d provided in the eyepiece lens 23 itself in the housing recess 31 to the observer side. Even with the outside-finder display device 17 configured to guide, the installation space of the LDE 29 can be minimized and the degree of freedom in design can be increased, without increasing the number of parts, as in the first embodiment. Moreover, according to the second embodiment, the manufacturing process is simplified as compared with the first embodiment, because the vapor deposition process of the reflecting surface is not necessary.

[0022]

[Effect of device]

 As described above, according to the present invention, it is possible to provide an out-of-viewfinder display device for a camera that does not increase the number of parts, makes the installation space of the light emitter as small as possible, and increases the degree of freedom in design.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing a main part of a display device outside a viewfinder according to the present invention.

FIG. 2 is a plan sectional view of a main part showing a second embodiment of the display device outside the viewfinder.

FIG. 3 is a rear view showing a camera equipped with a display device outside a viewfinder according to the present invention.

FIG. 4 is a cross-sectional plan view showing a comparative example with respect to the display device outside the viewfinder according to the present invention.

[Explanation of symbols]

 11 Camera 15 Finder Eyepiece Window (Finder Window) 17 Outside Viewfinder 19 Projection (Camera Cover) 21 Light Emitting Window 23 30 Eyepiece 23b Convex 23c Reflective Surface 25 31 Storage Recess 25a Through Hole 25b 31b Communication Hole 26 Lens Frame 29 LED (light-emitting body) 30b Parallel plane part (extension part) 30c Light transmission part 30d Reflection surface (total reflection surface) 31a Groove part L Luminous flux

Claims (7)

[Scope of utility model registration request] 1. Outside the eyepiece of the viewfinder of the camera,
In a display device outside a viewfinder of a camera provided with a light emitting window for a light emitting body such as an LED, a reflecting surface is provided on an eyepiece lens of the viewfinder so as to be located outside the effective light ray region, and the light of the light emitting body is passed through this reflecting surface. Is a display device outside the viewfinder of a camera, characterized in that it is guided to the light emitting window. 2. The display device outside the viewfinder of a camera according to claim 1, wherein the reflecting surface of the eyepiece lens is provided on the outer surface of the edge surface of the eyepiece lens. 3. The outside viewfinder of a camera according to claim 2, wherein the reflecting surface of the outer surface of the edge surface is formed by inclining the outer surface of the edge surface at a predetermined angle and depositing metal on the surface. Display device. 4. The display device outside the viewfinder of a camera according to claim 1, wherein the reflecting surface of the eyepiece lens is provided as a total reflection surface on the inner surface of the extension portion of the resin eyepiece lens. 5. The method according to any one of claims 1 to 4,
The display device outside the viewfinder of a camera, wherein the light emitter is arranged in a storage recess formed in a lens frame holding the eyepiece lens. 6. The light-emitting body according to claim 1, wherein the light-emitting body is arranged in a storage recess provided in a lens frame for holding the eyepiece lens, and an extension portion to be inserted into the storage recess is provided at an outer peripheral edge portion of the eyepiece lens. This extension is configured as a parallel plane portion that is substantially parallel to the optical axis of the eyepiece lens, and the surface of the parallel plane portion facing the light emitter is a light transmitting element that allows the light of the light emitter to enter. And the reflecting surface is provided on the inner surface of the inclined surface provided on the optical axis side of the light transmitting portion in the extension portion, and the reflecting surface totally reflects the light incident from the light transmitting portion toward the light emitting window. A display device outside a viewfinder of a camera, which is configured as a total reflection surface having a critical angle or more. 7. A camera frame having a lens frame for supporting the rearmost eyepiece of the finder; a finder window located behind the lens frame and a light emitting window outside the finder window; formed on the lens frame. A light-emitting body disposed in the storage recess; and a reflection surface formed on the eyepiece itself for guiding the light from the light-emitting body to the light-emitting window, the light-emitting body being positioned outside the effective light ray region of the rearmost eyepiece. An out-of-view display device for a camera, characterized by being equipped with.