JPS5944032A - Camera - Google Patents

Abstract

PURPOSE:To photograph an in-focus picture merely through release operation, by loading and holding automatically an attachment lens for short-distance photography on the front surface of a photographic lens. CONSTITUTION:The pin 8 of a locking lever 4 is at the highest point (c) of the cam surface of a cam gear 10 and the attachment lens 6 is loaded on the front surface of the photographic lens 3. In this state, when a distance measuring mechanism outputs a short-distance measurement signal, a holding mechanism 12 holds the lever 4. Namely, a shutter is released in the state wherein the lens 6 is mounted on the front surface of the photographic lens 3. When the short- distance measurement signal is not outputted, the holding mechanism 12 does not operate and the pin 8 of the lever 4 reaches a point (d) in a lower surface as a cam gear 10 rotates, releasing the shutter. Namely, the lens 6 moves away from the front surface of the photographic lens 3 except in the short-distance photography.

Description

[Detailed Description of the Invention] This invention U: J'i+M shadow lens, in a camera using a fixed focus lens that guarantees distance from infinity to several meters, the external force from its focal point, Φ depth is a close distance horse. (This relates to a camera in which the L area has nJ capability.

The Nonomera, which uses a fixed focal length lens as the 4th shadow lens, is well known, and since there is no need for focusing within the depth of focus of such a Canora d-photographing lens, the original intention of the camera was to take instantaneous n++ shots. While this has the advantage of matching, it also has the inconvenience of not being able to take pictures within the close range, which is outside the focal point 7 depth of the lens. Therefore, recent cameras
A model C has also appeared in which an attachment lens for close-up photography can be inserted into the front of the fixed focus lens.

However, the decision as to whether or not to insert the Oki attachment lens to the front of the photographic lens was left to the photographer's visual inspection and was configured to be done manually. ``T: Never use an attachment lens for close-up photography.
Sometimes I forgot to load it on the surface.

In view of the above, an object of the present invention is to provide a camera using a fixed focus lens as a photographing lens, in which an attachment lens is automatically inserted into the 611 plane of the photographing lens during close-range photography. The purpose is Another object of the present invention is to provide a camera in which an attachment lens is automatically inserted into the front of the photographic lens during close-range photography, and at the same time the flash of a strobe can be automatically adjusted.

Next, the present invention will be explained based on the embodiments shown on the attached page 1'.

1 is a substrate, 2 is a lens barrel provided in front of the substrate 1, and 3 is a lens barrel 2.
4 is a swinging lever rotatably attached to a shaft 5 erected on the base plate 1, and on the swinging lever 4 is an arm piece 7 on which an attachment lens 6 for close-up photography is attached.
There are some facilities. 8 is one end 4 of the swing lever 4
The pin 8 passes through an arc-shaped elongated hole 9 provided in the base &1 and projects to the back surface of the board 1. 1 (a cam pawl provided on the back side of the steamer 1, and the pin 8 of the swinging lever 4 or the lever spring 11 is attached to the cam surface of the cam pawl 10).
are pressed together by the elastic force of This stopper 10 is not shown in the figure, but is activated by a forceful release operation, rotates once, and then stops. One rotation of the thumb gear 10 (the attachment lens 6 is rotated ^1 of the photographing lens 3)
It is oscillated to charge 1ifll.

12i11) The lever 4 is swung by the wheel 10, and the attachment lens 6 is moved to the position A of the photographic lens 3.
11 is a hold rod structure that holds the swinging lever 4 when loaded onto the surface 11. In the case of the holding plate structure 12d shown in the figure, the other end 41) of the swinging lever 4 is erected. −
An iron piece 16 is attached to the tip of the pin 14 inserted into the moving piece 13 via a spring 15 so as to absorb overstroke.
and a solenoid 17 that attracts the iron piece 16.

The solenoid 17 is energized by a short distance measurement signal from a distance measurement mechanism (not shown). 18th strobe light control element, 19 is a □ cover plate having an aperture hole 20 that limits the light incident on the strobe light control element 18;
It is provided so as to extend beyond the other end 4b of the recording lever 4, and is configured to simultaneously cover the front surface of the strobe light control element 18 when the attachment lens 6 is inserted into the front surface of the photographic lens 3. There is. Reference numeral 21 denotes a stopper provided on the lens barrel 2 to which the photographing lens 3 is attached, and when the swinging lever 4 swings and the attachment lens 6 is inserted into the front of the i-shape lens 3, both lenses are rotated by 6°. The two optical axes are made to match exactly.

Now, when the release operation is performed, the cam gear 10 is activated and rotates counterclockwise (in the direction of the arrow).

When the cam gear 10 is activated, the pin 8 of the swing lever 4 is in pressure contact with the point a of the lower cam surface, so the attachment lens 6d is placed at a position that is out of the 611th plane of the photographing lens 3, as shown in No. 411. be. As the cam gear 10 rotates, when the pin 8 of the swing lever 4 exceeds point 1 on the cam surface, the swing lever 4 is gradually urged to swing, and when the cam surface reaches its lowest point C, the attachment The lens 6 is inserted into the wound surface of the photographic lens 3 as shown in the third figure. In addition, cam gear 10ij: t
ie, if the pin 8 of the movable lever 4 reaches the cam surface from point a to point 1, the film (not shown) is fed, and 1. ,．． 4 to C1'1!, I, the bτj output detection phase and distance measuring cypress stripes, etc., which are not shown, are operated.

711 arrangement <, +:+'! Place the attachment lens 6 on the highest cJ of the pin 8 of the moving lever 4 or the cam surface of the cam gear 10, and place the attachment lens 6 on the photographing lens 3 (at point n6, which is inserted into the 2-aligned ii surface, close to the distance measurement structure and the structure). When the distance measurement signal is output, the swing lever 4 is held by the hold mechanism 12.The cam gear 10 rotates during this hold, and the pin 8 of the swing side lever 4 is moved to In fact, it is now held at the same time as the shutter is released.

That is, when photographing at close range, the shutter is released in the state FC in which the attachment lens 6 is inserted in front of the photographic lens 3.

On the other hand, when the pin 8 of the swing lever 4 or the highest 0 point of the cam surface of the cam gear 10 is inserted into the front surface of the photographic lens 3 and the attachment lens 6 is inserted into the front surface of the photographic lens 3, the short distance measurement If the distance signal is not output, the above-mentioned hold mechanism 1
The pin 8 of the movable lever 1 is twisted as the cam gear 10 rotates without any action, and the pin 8 of the movable lever 1 crosses the stepped portion 10' of the cam surface, reaches point d on the lower surface, and the shutter is released. That is, the attachment lens 6 is retracted from the front surface of the photographic lens 3 except for close-up photography.

During close-range shooting, that is, when the attachment lens 6 or the photographing lens 3 is inserted into the front surface, the cover plate 19 with the aperture hole 20 extending to the other end 4b of the swing lever 4 is The front side of the strobe light control element 18 is covered, the light incident on the strobe light control element 18 is restricted, and the flash of the strobe light is automatically adjusted to provide proper exposure.

As described above, according to the present invention, in a camera using a fixed focal length lens as a photographing lens, when photographing in a short distance region outside the focal depth of the 4-lens & shadow lens, the C-close-range photographing attachment can be used. The camera is automatically loaded and held in front of the lens or photographic lens, allowing the photographer to take in-focus photos simply by operating the release button, regardless of whether the camera is shooting at close range or not. I can do it.

In addition, this invention starts with the swing lever C release signal when the attachment lens is attached [7], rotates once and stops 1-
The attachment lens is inserted into the front of the photographic lens, and when the short distance distance measurement signal is output at 114, it is held, and when the signal is not output, Since it is retracted from the Mi+ surface of the photographic lens, there is an advantage that the loading and retracting operation of the attachment lens can be carried out reliably and reliably.

Furthermore, in this case, when the swing lever is moved to the front of the 3rd lens, the diaphragm 1 which limits the light incident on the strobe L161 optical element is set at the same time. When equipped with a filter,
This has the advantage that the flash of the strobe is automatically adjusted when taking close-up shots, allowing you to take pictures with proper exposure.

[Brief explanation of the drawing]

An embodiment of the present invention is shown in the figures, in which Figure 1 is an exploded perspective view, Figure 2 is a perspective view after assembly, and Figures 3 and 4 are front views showing the operating state. 3... Photographing lens, 4... Swing lever. 6... Attachment lens, 10... Cam gear, 12... Hold mechanism. Patent applicant: Roku Konishi Photo Industry Co., Ltd. Figure 1, Figure 31! ! Figure 4

Claims (2)

[Claims] (1) In a camera that uses a fixed-focus lens as the photographic lens, insert the σ) attachment lens for close-range photography onto the cam gear that starts with the release signal, rotates once, and then stops in front of the photographic lens. When the short-range distance measurement signal is output from the distance measurement mechanism, the attachment lens is inserted into the front of the photographic lens. A camera characterized by being provided with a hold mechanism. (2) Claims in which the swing lever is provided with an aperture or a filter that simultaneously limits incident light to the strobe light control element when the attachment lens is inserted into the front surface of the photographic lens by swinging. The camera described in item 1.