JP2818006B2 - Camera remote control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a remote control device for remotely controlling a shutter of a camera.

"Prior art and its problems" This type of remote control device basically includes a transmitter and a receiver for infrared light (remote release signal light),
This receiver is mounted on the camera body and is linked with an electromagnetic shutter. The infrared light emitted from the transmitter is received by the receiver and the shutter is released. The receiver of this remote control device is generally mounted on a hot shoe of the camera body, and usually changes the direction of its receiving surface according to the expected position (direction) of the operator holding the transmitter. Was.

Therefore, this conventional device does not assume that the operator having the transmitter is the subject. For this reason, when setting an operator as a subject, there is no way to confirm whether the operator is in the screen. Especially zoom lens cameras,
In a camera such as a bifocal camera in which the focal length of the taking lens is not constant, the angle of view changes due to a change in the focal length, so that it is more difficult to confirm this.

Also, when trying to focus with the operator as the subject, it is not possible to confirm that the operator is in the distance measurement range, so that the operation of releasing the operator only when the operator is in focus cannot be performed.

"Object of the Invention" The present invention is based on the above awareness of the problems with the conventional remote control device, and when the operator himself becomes the subject, the remote control of the camera in which the shutter is not released when the operator is not in the screen. The aim is to obtain a control device.

A further object of the present invention is to provide a remote control device capable of prohibiting release of a shutter when an operator is not in a distance measurement range, for example.

"Summary of the Invention" The present invention provides a real image type finder device in which a subject image is once formed on an image forming surface by an objective optical system, and this image is observed by an eyepiece optical system. If the light receiving element of the receiver is arranged at a conjugate position, even if a release signal is issued from outside the screen, the signal is not received by the receiver, and thus the release is not performed, and attention is paid to this fact.

That is, the remote control device according to the present invention is characterized in that the light receiving element of the receiver is disposed at a position substantially conjugate with the image plane of the real image type finder device.

The real-image finder device is provided separately from the photographing optical system in a compact camera, but in a single-lens reflex camera, a photographing lens, a mirror, an image forming surface, a pentaprism, and an eyepiece constitute a real-image finder device. Therefore, the present invention is applicable to both compact cameras and single-lens reflex cameras.

The light receiving range of the light receiving element of the receiver is the image plane (shooting screen)
It can be switched between wide and narrow. For example, if the light receiving range is matched with the image plane (screen), no release is performed unless an infrared release signal is issued from within the screen. Therefore, a photograph in which the operator (strictly speaking, the transmitter) is always photographed can be obtained. Alternatively, if the light receiving range is made coincident with the distance measuring range of the distance measuring device, the release is not performed unless the infrared release signal light is emitted from within the distance measuring range. Therefore, a photograph in which the operator of the transmitter is focused can be obtained.

Such switching means may include, for example, forward / backward means for moving the light receiving element in the optical axis direction, and insertion / removal means for moving the condenser lens to the front of the light receiving element in conjunction with the forward / backward movement of the light receiving element. Can be. Alternatively, it may be constituted by a mask which advances and retreats to the front surface of the light receiving element and switches the range of light incident on the light receiving element to be wide and narrow.

In addition, the camera body is provided with an external light-receiving element for the receiver on its outer surface. By switching between this external light-receiving element and the internal light-receiving element in the real-image finder device, normal remote control mode and operation can be achieved. The mode can be easily switched to the person imprinting mode.

"Examples of the Invention" The present invention will be described below with reference to illustrated examples. 1A-1D
The figure shows an embodiment in which the shutter is not released unless infrared remote light is transmitted from the distance measurement range in the viewfinder frame.

The real image type zoom finder device 11 has, on the optical axis O1, an objective optical system including movable variable magnification lenses L1 and L2 and a fixed lens L3.
An image is formed on a focusing plate (imaging plane) 13 placed behind. The image on the focus plate 13 is observed through the objective lens L4 and the Porro prism P on the optical axis O2 constituting the eyepiece optical system. The porro prism P is for reversing the top, bottom, left and right of the object image by the objective optical system.

The present invention is characterized in that the light receiving element 14 of the receiver is disposed at a position optically conjugate with the focusing plate 13 with the half mirror 12 interposed therebetween. The position of the light receiving element 14 on the optical axis O1 is
The light receiving range is the distance measuring range 16 within the visual field frame 15 shown in FIG. 1D.
It is determined to match. In FIG. 1D, the light receiving range of the light receiving element 14 is shown by hatching.

FIG. 7 shows the appearance of a camera body 20 having the real image type zoom finder device 11 and a transmitter 30. The transmitter 30
It has a trigger switch 31 and a light emitting section 32. When the trigger switch 31 is pressed, the light emitting section 32 emits an infrared release signal light.

The camera body 20 has a zoom photographing optical system 22 separately from the real image type zoom finder device 11, and an external light receiving element 17 is provided on the front outer surface in addition to the (internal) light receiving element 14. The external light receiving element 17 and the light receiving element 14
As shown in the figure, it is connected to a shutter control circuit 25 via an inside / outside changeover switch 24. Shutter control circuit 25
When the infrared release signal light enters one of the external light receiving element 17 and the light receiving element 14 selected by the inside / outside changeover switch 24, the electromagnetic shutter 26 in the camera body 20 is operated. The inside / outside changeover switch 24 can be provided on the outer surface of the camera body 20, for example. When performing zooming, the zoom imaging optical system 22 of the camera body 20 and the real image type zoom finder device 11 are linked so that the shooting range and the view range substantially match. Such an interlocking mechanism is well known. The camera body 20 is provided with a strobe device 27 and a manual release switch 28.

The remote control device having the above-described configuration is configured such that when the operator's projection mode in which the input to the light receiving element 14 is enabled and the input to the external light receiving element 17 is disabled is selected by the inside / outside changeover switch 24 of the camera body 20, the distance measurement range is set. As long as the infrared release signal light is not oscillated from within 16, no release is performed.
That is, since the light receiving range of the light receiving element 14 is limited to within the distance measuring range 16, an operator outside the distance measuring range 16
Even if the trigger switch 31 of 30 is pressed to oscillate the infrared release signal light from the light emitting section 32, the light is not received by the light receiving element 14, so that the shutter control circuit 25 does not operate the electromagnetic shutter 26. Therefore, a photograph in which the operator who has a very high possibility of being within the distance measurement range 16 can be taken.

On the other hand, if the normal mode in which the input to the external light receiving element 17 is enabled and the input to the light receiving element 14 is disabled is selected by the inside / outside changeover switch 24, the infrared release signal from the light emitting section 32 of the transmitter 30 is selected. Remote imaging is possible in a range where light enters the external light receiving element 17.

2A to 2D show a second embodiment of the present invention. In this embodiment, the light receiving range of the light receiving element 14 is substantially matched with the range of the visual field frame 15 so that the shutter is not released unless the operator (strictly speaking, the light emitting unit 32 of the transmitter 30) is in the shooting screen. It was done.

In this embodiment, the light receiving element 14A is located rearward as compared with the first embodiment, and the condenser lens 18 is located between the light receiving element 14A and the half mirror 12. The condensing lens 18 condenses light incident on the range of the field frame 15 of the focus plate 13, that is, the light incident on the photographing screen, and gives the light to the light receiving element 14A. The oblique lines in FIG. 2D indicate the light receiving range of the light receiving element 14A. Therefore, in this embodiment, unlike the previous embodiment, only when the infrared release signal light is oscillated from within the visual field frame 15 (photographing screen), the shutter control circuit 25
The electromagnetic shutter 26 is released. Therefore, the probability that the operator having the transmitter 30 is displayed on the screen is extremely high. In this case as well, it goes without saying that distance measurement is performed on the subject within the distance measurement range 16.

3A to 3C show that the switching between the first embodiment and the second embodiment is enabled. The light receiving element 14 is supported by a guide mechanism (not shown) so as to be able to move straight on the optical axis O1. On one side of the light receiving element 14, a cam plate rotatable about the axis 40 integrally with the axis 40 in a plane parallel to the optical axis O1.
A drive pin 14a fixed to the light receiving element 14 is fitted in a cam groove 42 of the cam plate 41. The condenser lens 18 is further fixed on the cam plate 41. The shaft 40 is integrally provided with a sector gear 43 at the end opposite to the cam plate 41, and the rack 45 provided on the slide lever 44 meshes with the sector gear 43. Therefore,
When the slide lever 44 is slid, the cam plate 41 rotates via the rack 45, the sector gear 43, and the shaft 40. The condensing lens 18 advances and retreats on the optical axis O1 by the rotation of the cam plate 41, and at the same time, the light receiving element 14 advances and retreats in the optical axis O1 direction by the cam groove 42 and the driving pin 14a. And this condenser lens 18
And the light-receiving element 14 are the first one in which the condenser lens 18 advances on the optical axis O1.
In the state shown in FIGS. 3A and 3B, the light receiving element 14 retreats to the position of the light receiving element 14A of the second embodiment (FIGS. 2A to 2D), and the condenser lens 18 retreats from the optical axis O1 in FIG. 3C. In this state, the light receiving element 14 is linked to advance to the position of the first embodiment (FIGS. 1A to 1D).

Therefore, according to this embodiment, the light receiving range of the light receiving element 14 can be substantially adjusted by the sliding operation of the slide lever 44.
Switching between the first embodiment in which the light receiving area of the light receiving element 14 substantially matches the visual field frame 15 can be easily performed.

Of course, the light receiving range of the light receiving element 14 can be set to an intermediate size between the first and second embodiments.

FIGS. 4A to 4C and FIGS. 5A and 5B show another embodiment for switching the range of light received by the light receiving element 14B to a wide range. In front of the light receiving element 14B, a condenser lens 18A that collects light in the field frame 15 on the focus plate 13 is provided. Divided masks 46A and 46B are provided between the condensing lens 18A and the porro prism P so as to move the range of light incident on the light receiving element 14B to be narrow and wide. This split mask 46A and 46B
Forms a small opening 16 'at the center when they partially overlap as shown in FIG. 5B, and opens the field frame 15 when they are separated as shown in FIG. 5A. The small aperture 16 'corresponds to the distance measurement range 16. The division masks 46A and 46B are supported so as to be movable in a direction orthogonal to the optical axis O1. On the other hand, a cam plate 47 movable in a plane parallel to the optical axis O1 is provided at one end of the divided masks 46A and 46B, and a pair of cam grooves 48A and 48B are formed in the cam plate 47. ing.
Driving pins provided on the division masks 46A and 46B are fitted into the cam grooves 48A and 48B, and when the cam plate 47 is moved straight, the division masks 46A and 46B move between FIGS. 5A and 5B. Moving. The cam plate 47 is provided with a rack 47A in the moving direction, and a gear 49A meshes with the rack 47A. The gear 49B integrated with the gear 49A via the shaft 40A is meshed with the rack 45A of the slide lever 44A, so that when the slide lever 44A is slid, the divided mask 46A
46B moves closer or further away.

Therefore, according to this embodiment, the sliding operation of the slide lever 44A moves the divided masks 46A and 46B to the open positions shown in FIGS. By moving the division masks 46A and 46B to the light receiving range limiting positions shown in FIGS. 5B and 4C, the light receiving range of the light receiving element 14 can be made to substantially match the field frame 15.

FIG. 6 shows an embodiment in which the present invention is applied to a single-lens reflex camera. In the single-lens reflex camera, a real image type finder device is constituted by a photographing lens 51, a mirror 52, a focus plate (imaging plane) 53, a condenser lens 54, a pentaprism 55, and an eyepiece 56. That is, an object image formed on the focus plate 53 by the photographing lens 51, which is an objective optical system, is observed by the eyepiece optical system including the eyepiece 56 and the condenser lens 54.

On the back of the mirror 52 whose center is a half mirror,
A sub mirror 57 is provided, and a condenser lens 18B and a light receiving element 14C are provided on the optical path reflected by the sub mirror 57. The relationship between the condenser lens 18B and the light receiving element 14C is, for example, the relation between the condenser lens 18 and the light receiving element 14 in the embodiment shown in FIGS. 2A to 2C.
The relationship may be A, and if the infrared release signal light is oscillated from within the shooting screen, the electromagnetic shutter is released.

Of course, if the condenser lens 18B of this embodiment is abolished and the light receiving element 14B is moved forward by a predetermined amount, as in the embodiment of FIGS. The remote control device in which the electromagnetic shutter is released only when is generated is oscillated. Further, the switching mechanism shown in FIGS. 3A to 3C can be applied to this embodiment.

FIGS. 4A to 4C show that the switching mechanism shown in FIGS. 5A and 5B is applied to the embodiment shown in FIG. 6 by a condensing lens 18B and a light receiving element arranged to receive light in the field frame 15. Before 14C, the division masks 46A and 46B may be moved forward and backward.

[Effects of the Invention] As described above, the remote control device for a camera according to the present invention receives a remote release signal light at a position substantially conjugate with the image forming position of the objective optical system using the real image type finder device. Since the light receiving element is provided, it is possible to obtain a remote control device that is not released unless the release signal light is oscillated from within the shooting screen. The real image type finder device may be a type provided separately from the photographing optical system according to the second aspect, or a single-lens reflex camera according to the third aspect.

Further, if a switching device that switches the light receiving range of the light receiving element between wide and narrow is provided, for example, the release is performed only when the release signal light is oscillated from within the distance measuring range,
Alternatively, the release can be selectively performed when the release signal light is oscillated from a wider shooting range.
The switching device according to claims 5 and 6 can constitute this switching mechanism with a simple configuration.

[Brief description of the drawings]

1A to 1D show a first embodiment of a camera remote control device according to the present invention, FIG. 1A is an elevation view,
1B is a plan view, FIG. 1C is a side view, and FIG. 1D is a front view of a finder field. 2A to 2D show a second embodiment of the camera remote control device according to the present invention, FIG. 2A is an elevation view,
2B is a plan view, FIG. 2C is a side view, and FIG. 2D is a front view of the finder field. 3A to 3C show an embodiment of a light receiving range switching mechanism. FIG. 3A is an elevational view of a main part corresponding to FIGS. 1A and 2A, and FIG.
FIG. 3B is a plan view of a main part corresponding to FIGS. 1B and 2B, and FIG.
It is an elevational view of an operation state different from a figure. 4A to 4B show an embodiment of a light receiving range switching mechanism, FIG. 4A is an elevational view of a main part corresponding to FIG. 3A, and FIG.
FIG. 4C is a plan view of a main part corresponding to FIG. 3B, and is an elevation view of an operation state different from that of FIG. 4A. 5A and 5B are front views showing the open state of the divided mask and the light receiving range limited state in the embodiment of FIGS. 4A to 4C, respectively. 6 is an optical layout diagram showing an embodiment in which the present invention is applied to a single-lens reflex camera, FIG. 7 is a perspective view showing the appearance of a transmitter and a camera body, and FIG. 8 is a diagram showing an operator imprint mode and a normal mode. FIG. 3 is a block diagram illustrating a switching circuit. 11: Real image type zoom finder device, 12: Half mirror, 13: Focusing plate (imaging plane), 14, 14A, 14B, 14C ...
... Light receiving element, 14a ... Drive pin, 15 ... Field frame, 16 ...
Distance measuring range, 17: External light receiving element, 18, 18A, 18B: Condensing lens, 20: Camera body, 22: Zoom shooting optical system,
24 ... internal / external switch, 25 ... shutter control circuit, 26
... Electromagnetic shutter, 30 ... Transmitter, 31 ... Trigger switch, 32 ... Light emitting unit, 40, 40A ... Shaft, 41, 47 ... Cam plate, 42, 48A, 48B ... Cam groove, 43 ... ... sector gear, 44,
44A …… Slide lever, 45, 45A… Rack, 46A, 46B
…… Division mask, 51 …… Shooting lens, 52 …… Mirror, 53
…… focus plate (imaging plane), 55 …… Penta prism, 56…
… Eyepiece, 57 …… submirror.

Claims (6)

(57) [Claims] 1. A transmitter for emitting a remote release signal light, a camera body having a real image type finder device, and a receiver for receiving a remote release signal light from the transmitter and releasing an electromagnetic shutter of the camera body. In a remote control device for a camera having, at a position substantially conjugate with the image plane of the real image type finder device,
A remote control device for a camera, comprising a light receiving element of the receiver. 2. A remote control device for a camera according to claim 1, wherein the real image type finder device is provided separately from the photographing optical system. 3. A remote control device for a camera according to claim 1, wherein the real image type finder device is a finder device for a single-lens reflex camera. 4. A remote control device for a camera according to claim 1, further comprising a switching means for switching a light receiving range of said light receiving element in an image forming plane to be wide or narrow. 5. A switching means according to claim 4, wherein said switching means includes means for moving said light-receiving element back and forth in the optical axis direction, and said insertion and removal means for moving said condenser lens to a front surface of said light-receiving element in conjunction with movement of said light-receiving element. Camera remote control device consisting of 6. A remote control device for a camera according to claim 4, wherein said switching means is a mask which advances and retreats to a front surface of said light receiving element to switch a range of light incident on said light receiving element.