JPS5829449Y2 - Camera Niokele Bellows Souch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a bellows device for close-up photography, and is particularly effective when used in conjunction with a camera equipped with an electromagnetically driven shirt release device.

In close-up operations performed with a bellows device interposed between the camera body and the photographic lens of a single-lens reflex camera with interchangeable lenses, the photographic lens and a pre-operation mechanism for shirt release, such as an aperture operation mechanism in the camera body, and the photographic lens. As a result, when taking such pictures, conventionally a double cable release was used.

When taking pictures using this type of double cable release, the ends of the two cables must first be attached to the bellows device and the camera body, and when the release is operated, the ends of the bellows device must be attached to the photographic lens. Installation requires adjusting the operating order of the two cables mentioned above so that the release on the camera body side is activated when the aperture mechanism is completely stopped down to the preset value. In addition to being careful about this, the actual release operation is heavy and the operation stroke is a two-stage operation, which makes the operation feel uncomfortable. As a result of this operation, there will be some time difference between the start of this operation and the time when the shutter actually opens.
This method has disadvantages in use, such as missed photo opportunities.

Of course, this 5 & double cable release is difficult to process as a special cable release due to the purpose of use mentioned above, and the cable length is also longer, making it more sophisticated and expensive than a normal cable release. There was no □ on my cell phone.

Accordingly, the present invention provides a bellows device which can be operated with a conventional single cable release.

The embodiment shown in the drawings will be explained below.

FIG. 1 is a perspective view of a camera using the bellows device of the present invention, in which the bellows device 3 of the present invention is interposed between the camera body 1 and the photographing lens 2.

The bellows device 3 is attached to the camera body 1 by connecting the mounting portion 3a and the mounting mount portion 3b of the photographing lens 2 with a bellows 3c, in the same way as conventionally known devices. It consists of a feeding mechanism part 3d of a mount part 3b, and a single signal cable release 4 is attached to the Konoheros device 3, and the device 3 and the camera body 1 are connected to each other.
A single electrical line 5 is placed between the two.

FIG. 2 is a front view showing the configuration of the main parts of the device of the present invention. One end of the movable rod 8 serving as an operating member is facing upward.

The other end of the rod 8 faces the four-movement contact piece 9a of a switch 90, which is connected to the electromagnetic relay circuit for starting the shutter on the camera body side through the electric line 5.

On the other hand, the other end of a relay lever 10 having an abutting end on one end of the aperture opening/closing operating lever 7 is brought into contact with the bent portion 8a of the movable rod 8, and the middle portion of the relay lever 10 has a large , push button type narrowing confirmation rod 1 installed on the bellows outer casing
There is no one so that the entry end of No. 1 is brought into contact with the other end.

In addition, 12 is an aperture drive pin of the photographic lens 2, and 13 is an energizing spring hooked between the lever T and the stationary part 14 of the device.

According to the device of the present invention having such a configuration, when the normal single cable release 4 is operated in the photographing operation state in which the device is in the state shown in the first figure, its attachment is at the tip of the rod that enters from the opening 6. Push the bent end 8a of the moving rod 8 to move it to the left in FIG.

With this operation, the relay lever 10, whose one end was in contact with the inner side wall of the bent end 8a, rotates about its support shaft in the counterclockwise direction in the figure, and the other end is used as the aperture opening/closing operating lever. T is rotated clockwise in the figure against the acting force of the energizing spring 13.

As a result, as the lever 7 moves, the aperture drive pin 12, which had previously been held at the fully open aperture position by the action of the lever 0 energizing spring 13, pivots to the right in the figure. do.

Therefore, the aperture mechanism of the photographic lens 2 is narrowed down toward its preset aperture chain state.

Then, in the final region video of this moving operation, the previous narrowing operation is completed, and the aperture opening/closing operation lever 7 at the end of the subsequent moving rod 8 moves its tip away from the narrowing drive pin 12 and enters the idle operation. On the other hand, in the final region of this movement, the moving rod 8
The other end pushes the movable contact piece 9a to close the switch 9.

This closing activates the electromagnetic mechanism for starting the release on the camera body side, which is electrically connected through the electric line 5, to start the shutter operation.

When the pushing operation of the cable release 4 is released, the operating mechanism is returned to its original state by the force of the energizing spring 13.

Further, in the preparation stage for photographing, if it is desired to perform only a narrowing down operation to confirm the photographing depth, etc., the narrowing down confirmation rod 11 is pressed.

As a result, the relay lever 1a and the aperture opening/closing operation lever T operate in the same way as in the case of the previous one, and the aperture is narrowed down. However, in this case, since the movable rod 8 is in a stopped state, the closing operation of the switch 9 is performed. will not be carried out.

Therefore, it is possible to perform a narrowing down operation without activating the shutter.

As described above, according to the device of the present invention, it is possible to perform appropriate photographing operations with a bellows attached using a normal single release, eliminate the above-mentioned drawbacks when using a conventional double release, and further improve the aperture confirmation mechanism, etc. It also has secondary benefits such as the ability to incorporate auxiliary mechanisms relatively easily.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the state of a camera equipped with the device of the present invention, and FIG. 2 is a front view showing the main structure of the device of the present invention. 3...Bellows device, 4...Single cable release, 5...Electric line, 6...Mounting port, γ...Aperture opening/closing operation lever, 8...Moving rod, 10... Relay lever 12...Aperture drive pin.

Claims (1)

[Scope of utility model registration request] An aperture opening/closing operating lever is provided on the photographic lens mount portion of the bellows device, and is provided with a rotational force that engages with an aperture drive pin of the photographic lens coupled to the mount portion and biases the aperture drive pin in the direction of opening the aperture. a moving rod that is operated by a cable release coupled to the mount portion and moves the aperture opening/closing operation lever in the aperture operating direction; and an electricity for driving the camera release that is operated in the final range of the movement of the moving rod. A bellows device for a camera, comprising a switch and an aperture confirmation member that moves the aperture opening/closing operation lever in the aperture operating direction independently of the moving rod.