JPH064756U - camera - Google Patents

Abstract

(57) [Summary] [Object] To provide a camera capable of preventing the inconvenience of damaging or damaging the shutter curtain of the focal plane shutter when the panorama adapter is attached to or detached from the aperture. [Structure] In a single-lens reflex camera that has a focal plane shutter and an imaging screen regulation adapter can be attached to and detached from the aperture, shutter control that opens and closes the shutter curtain of the focal plane shutter regardless of the shutter release operation at the time of shooting Camera with means.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a camera, and more particularly, to a camera having a focal plane shutter, in which an imaging screen regulating adapter can be attached / detached to / from the aperture.

[0002]

[Prior art and its problems]

 For panoramic photographs taken with a still camera, the film is shielded at a certain width above and below the film surface, and is shot on a screen that is wider than the normal shooting screen size (24 mm x 36 mm). It is to be burned on. There is a camera dedicated to panoramic shooting, but this can only be used for panoramic shooting, so it was inconvenient if you wanted to shoot with a normal shooting screen size, you had to walk with a normal camera. Therefore, in recent years, a photographing screen restriction adapter (hereinafter referred to as a "panorama adapter") has been devised, which is fixed to an aperture of a normal camera, and the upper and lower portions of the aperture are shielded by a certain width to allow panoramic photographing.

By the way, it has been found that the following problems occur when the panorama adapter is attached to and detached from a camera having a focal plane shutter. Normally, the shutter curtain of the focal plane shutter is arranged close to the opening (aperture opening) on the film surface side of the aperture. Since this shutter curtain is made of a material that is extremely thin and light in terms of its function, it is a member that is easily damaged by an external force. On the other hand, since the panorama adapter is attached to and detached from the aperture frame forming the aperture opening, it may come into contact with the shutter curtain when attaching and detaching. For this reason, the shutter curtain may be damaged when the panorama adapter is attached or detached, and may be damaged in extreme cases.

[0004]

[The purpose of the device]

 The present invention has been made based on the problem of the camera having the conventional focal plane shutter described above, and when the panorama adapter is attached to or detached from the aperture, the shutter curtain of the focal plane shutter is damaged or damaged. It is an object of the present invention to provide a camera that can prevent the occurrence of an accident.

[0005]

[Outline of the device]

 The camera of the present invention has a focal plane shutter, and in the camera in which the photographing screen regulation adapter can be attached to and detached from the aperture, the shutter curtain of the focal plane shutter is opened and closed regardless of the shutter release operation at the time of photographing. It is characterized by having a shutter control means.

[0006]

【Example】

 The present invention will be described below with reference to illustrated embodiments. 4 to 6 show an embodiment of a single-lens reflex camera having a focal plane shutter to which the present invention is applied. The camera body 11 of the single-lens reflex camera 10 (camera) has a lens mount portion 12 for mounting a replaceable photographing lens (not shown) on its front surface, and an openable back cover 13 on its back surface. Have

On the left and right sides of the camera body 11, there are formed a cartridge chamber 14, and a spool chamber 17 having therein a sprocket 15 and a spool 16 for winding up a film sent from the cartridge chamber 14. An aperture opening 18 is provided between the patrone chamber 14 and the spool chamber 17.

The camera 10 includes a panorama adapter 30 for switching the shooting screen size to the panorama size. The panorama adapter 30 has two light shielding plates 31 which should be located above and below the aperture opening 18, and can be attached to and detached from the aperture frame portions 18a located on the left and right of the aperture opening 18 by a known means. Is.

As shown in FIGS. 5 and 6, the camera 10 also has a shutter curtain, which is a component of the focal plane shutter, at a position slightly entering from the aperture opening 18 to the front side of the camera 10, that is, the left side in the figure. Have twenty. 5 shows a state where the shutter curtain 20 is closed, and FIG. 6 shows a state where the shutter curtain 20 is open. The illustration of the entire unit that constitutes the focal plane shutter of the camera 10 is omitted.

FIG. 1 is a block diagram showing main components of a camera 10 according to the present invention. The adapter attachment / detachment permission switch 50 is means for transmitting the attachment / detachment of the panorama adapter 30 to the control means 53, and is operated by the photographer before attaching / detaching the panorama adapter 30. The adapter attachment / detachment permission switch 50 is provided on the camera body 11.

The back lid opening / closing detection switch 51 (back lid opening / closing detection means) is a means for detecting the opening / closing of the back lid 13 and transmitting the detection result to the control means 53 described later. The back cover opening / closing detection switch 51 is provided so as to be interlocked with the vertical movement of the back cover opening lever 45 that opens and closes the back cover 13.

The shutter drive means 52 is means for opening and closing the shutter curtain 20. By receiving the drive signal sent from the control means 53, this means opens and closes the shutter curtain 20 via the drive device of the focal plane shutter unit (not shown).

The control unit 53 is a control circuit (CPU) that controls various functions and members of the camera 10. When the control means 53 receives the operation information when the adapter attachment / detachment permission switch 50 is operated and the detection information that the back lid opening / closing detection switch 51 detects that the back lid 13 is opened / closed, , A drive signal for opening and closing the shutter curtain 20 is transmitted to the shutter drive means 52.

Hereinafter, a specific operation state of the camera 10 will be described with reference to the flowchart shown in FIG. When the adapter attachment / detachment permission switch 50 is turned on, the control means 53 is activated to enter the flowchart shown in FIG. In step S1, whether or not the back cover 13 is opened is determined by the back cover opening / closing detection switch 51. If it is open, the process proceeds to step S2. If not, the process in step S1 is performed. To continue.

In step S2, the shutter curtain 20 is opened. After opening the shutter curtain 20, the photographer attaches or detaches the panorama adapter 30 to or from the aperture opening 18. Then, in step S3, it is determined whether or not the back cover 13 is closed. If it is closed, the process proceeds to step S4, and if it is not closed, the process in S3 is continued. In step S4, the shutter curtain 20 is closed and the process ends.

If the case back 13 is not opened or closed before the lapse of a predetermined time after entering Steps S1 and S3, the flow chart can be exited and terminated after the predetermined time. Good. With this configuration, power saving can be achieved.

According to the above configuration, when the panorama adapter 30 is attached to the camera 10, the shutter curtain 20 is always open, so the shutter curtain 20 is damaged or damaged when the panorama adapter 30 is attached. Never.

Further, as a second embodiment of the operation by the control means 53 of the camera 10, the configuration shown in FIG. 3 in which step S1 of the flowchart shown in FIG. 2 is omitted may be adopted. With this configuration, the shutter curtain 20 is opened at the same time when the adapter attachment / detachment permission switch 50 is turned on, and the shutter curtain 20 is closed at the same time when the back cover 13 is closed.

Further, as a third embodiment, the adapter attachment / detachment permission switch 50 in the second embodiment is deleted, and when the back cover 13 is opened, the control means 53 is activated and the flow shown in FIG. You may make it the structure which enters into the operation | movement of a chart. According to this configuration, when the photographer opens the back cover 13, the shutter curtain 20 is opened at the same time when the back cover 13 is opened, and the taking lens barrel 12 is housed at the same time when the back cover 13 is closed.

In the first and second embodiments, a release button (not shown) provided on the camera 10 is pressed in place of the location where the back cover 13 is opened and closed to cause the control means 53 to perform the flow chart operation. Then, a similar operation may be performed. In this case, step S1 and step S3 in FIG. 2 showing the first embodiment, and step S6 in FIG. 3 showing the second embodiment are replaced by the release button state judgment.

Further, in the above-described embodiment, instead of the position of the control operation for closing the shutter curtain 20 when the back cover opening / closing detection switch 51 detects that the back cover 13 is closed, for example, the camera 10 Is further provided with a detecting means for detecting the presence / absence of attachment / detachment of the adapter or a detecting means for detecting the presence / absence of loading of a film to detect when the panorama adapter 30 is attached / detached or when the film is loaded. At this time, the control operation of closing the shutter curtain 20 may be performed. In the flow chart operation in this case, step S3 shown in FIG. 2 and step S6 shown in FIG. 3 are replaced by the state determination of the attachment / detachment of the panorama adapter 30 or the loading of the film.

[0022]

[Effect of device]

 As described above, according to the camera of the present invention, the shutter curtain of the focal plane shutter is always opened when the panorama adapter is attached to or detached from the camera. The inconvenience of scratching or damaging the can be eliminated.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main structure of a single-lens reflex camera to which the present invention is applied.

FIG. 2 is a flow chart showing the operation of the embodiment.

FIG. 3 is a flow chart showing the operation in the second and third embodiments, which is different from the above embodiment in operation.

FIG. 4 is a perspective external view of a single-lens reflex camera to which the present invention is applied.

5 and 6 are explanatory views showing the operation of the shutter curtain of the same camera.

[Explanation of symbols]

 10 Single-lens reflex camera (camera) 11 Camera body 12 Lens mount 13 Back cover 14 Patrone chamber 15 Sprocket 16 Spool 17 Spool chamber 18 Aperture opening 18a Aperture frame 20 Shutter curtain 30 Shooting screen regulation adapter 31 Light shield 45 Back cover release lever 50 Adapter Attachment / Detachment Permission Switch 51 Back Cover Open / Closed Detection Switch (Back Cover Opened / Closed Detection Unit) 52 Photographic Lens Driving Unit 53 Control Unit (Shutter Control Unit)

Claims (9)

[Scope of utility model registration request] 1. A camera having a focal plane shutter, wherein a photographing screen regulating adapter can be attached / detached to / from an aperture of the focal plane shutter, regardless of a shutter release operation at the time of photographing.
A camera having shutter control means for opening and closing a shutter curtain of a focal plane shutter. 2. The adapter according to claim 1, further comprising an adapter attachment / detachment permission switch and a back lid opening / closing detection means, wherein the shutter control means turns on the adapter attachment / detachment switch and opens the back lid by the back lid opening / closing detection means. A camera that controls the opening of the shutter curtain when this is detected. 3. The camera according to claim 1, further comprising an adapter attachment / detachment permission switch and a back lid opening / closing detection means, and the shutter control means controls to open the shutter curtain when the adapter attachment / detachment switch is turned on. 4. The back cover opening / closing detecting means according to claim 1, wherein the shutter control means controls to open the shutter curtain when the back lid opening / closing detecting means detects that the back lid is opened. Camera to do. 5. The shutter control means according to claim 2, further comprising: after the shutter curtain is opened, the back cover opening / closing detection means detects that the back cover is closed. A camera that sometimes controls the closing of the shutter curtain. 6. The detecting device according to any one of claims 2, 3 and 4, further comprising detection means for detecting whether or not the photographing screen regulation adapter is attached to or detached from the aperture, and the shutter control means further opens the shutter curtain. After that, the camera controls to close the shutter curtain when the detecting means detects attachment / detachment of the photographing screen regulation adapter to / from the aperture. 7. The detection device according to claim 2, further comprising detection means for detecting whether or not a film is loaded, and the shutter control means further detects the detection after opening the shutter curtain. A camera for controlling the closing of the shutter curtain when the means detects that the film has been loaded. 8. The apparatus according to claim 1, further comprising an adapter attachment / detachment permission switch, wherein the shutter control means opens the shutter curtain when the adapter attachment / detachment switch is turned on and the release button is operated, and then the release button is pressed again. A camera that controls the shutter curtain when it is operated. 9. The adapter according to claim 1, further comprising an adapter attachment / detachment permission switch, wherein the shutter control means opens the shutter curtain when the adapter attachment / detachment switch is turned on, and then operates the shutter release button when the shutter button is operated. A camera that controls the closing of the camera.