JPS5944610B2 - Automatic diaphragm interlocking mechanism in bellows device with rotating mechanism - Google Patents

Description

[Detailed description of the invention]. In a camera that has an automatic diaphragm mechanism between the camera body and its photographic lens, even when the camera body and photographic lens are separated and the two are connected by a bellows device for photographing purposes such as close-up photography, the camera A so-called auto bellows is already known in which an interlocking mechanism on the main body side and an interlocking mechanism on the photographic lens side are interlocked to enable automatic aperture to be linked.

However, in conventional auto bellows, the above-mentioned two interlocking mechanisms are linked together only when shooting in a horizontal position, so the automatic diaphragm is only linked when the camera is attached to the bellows device in a horizontal position. First, in the case of other postures, it is necessary to tilt the camera body including the bellows device.

On the other hand, in general, in close-up photography, etc., the background becomes blurred with respect to the main subject, so there is an extremely large demand to photograph the main subject at an arbitrary inclination with respect to the vertical direction in a vertical or horizontal state. Conventional auto bellows, which allowed automatic aperture-linked photography only in the horizontal position, were extremely inconvenient to use.

An object of the present invention is to obtain an automatic aperture interlocking mechanism for a bellows device, which allows the camera body to be tilted at an arbitrary angle in a plane orthogonal to the optical axis of the bellows device, and also enables automatic aperture interlocking. It is something. Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is an external side view of an embodiment according to the present invention,
A so-called bellows 9, which is a light-tight flexible member, has one end attached to the fixed frame 5 and the other end fixed to the lens moving frame 4. The lens moving frame 4 is parallel to the fixed frame 5 and cannot be rotated relative to the fixed frame 5.
The bellows 9 can be slid in an extendable and retractable direction by means of a guide rail 7 fixed to the bellows device. The lens barrel 2 removed from the camera body 1 can be attached to the lens moving frame 4, and 3 is
This is an aperture preset ring that is rotatable with respect to the lens barrel 2.

As shown in FIG. 2, the camera body 1 includes the fixed frame 5
vC. A rotatable inner cylinder 6 is rotatably fitted into a hollow cylindrical outer cylinder part 5a that is formed and constitutes a part thereof.
will be installed on the

The fixing screw 8 is a locking screw that fixes the inner tube 6 within the outer tube portion 5a so as not to rotate.

Inside the camera body 1, an aperture operating lever 10 is rotatably supported by a shaft hole 11 (FIG. 3) relative to the camera body 1vc. In FIG. 3, an O-shaped lever 12 that is rotatable on a rotation shaft 13 with respect to the inner cylinder 6 is pivoted around the rotation shaft 13 on an optical axis Pvc. On the other hand, the interlocking pin 12a, which rotates eccentrically and is implanted in the 0-type lever 12 toward the camera body, is connected to the aperture operating lever 1.
engaged with 0.

Further, on the other side of the O-shaped lever 12 facing the photographing lens, cam plates 12b and 12c are protruded on the left and right sides, respectively.
Cam surfaces 12b1 and 12c1vc formed on the outer and inner circumferential surfaces of both cam plates 12b and 12c respectively correspond to the conversion lever 1.
At least one of the conversion pins 14a and 14b implanted in 4f1C is engaged with the 0-type lever 12 as it rotates about the shaft 13. The conversion lever 14 is connected to the fixed frame 5
It is rotatably supported by a rotating shaft 15.

Fixed frame 5VC. A first interlocking lever 16 is rotatably supported by a shaft 17, one end of the first interlocking lever 16 is connected to the conversion lever 14 by a link 18, and the other end is connected to an interlocking rod 21VC. It engages on its right side.

The second interlocking lever 19 is rotatably supported by the lens moving frame 4vc shaft 20, and one end thereof is connected to the interlocking rod 21vc.
It is engaged at its left end 1111, and the preset pin 22 of the photographic lens is engaged at the other end.

As shown in FIG. 3, the interlocking rod 21 is arranged along the guide rail '7 between the two guide rails 7, 7, and one end thereof is connected to the shaft pin 21 as shown in FIG.
The shaft pin 21b at the other end is rotatably supported by a connecting plate 7a connecting both guide rails 7, as shown in FIG. As shown in FIG. 3, the shaft pins 21a, 21 are
A counterclockwise rotation habit is given to b.

This direction biases the aperture of the photographic lens in a direction to narrow it down. The operation of the automatic aperture interlocking mechanism having the above configuration will first be described with reference to FIGS. 3 to 5 when the camera body 1 is in a horizontal position relative to the bellows device. Because it is under pressure,
The interlocking pin 12a is pushed to the right in FIG. 3, and as a result, the type 0 lever 12 is rotated counterclockwise, and the cam surface 12b1 of the right cam plate 12b engages with the conversion pin. 14a to the right, the conversion lever 14 is prevented from rotating counterclockwise, and the first interlocking lever 16 is rotated clockwise. Rotate against it.

Therefore, clockwise rotation of the movement rod 21 causes the second interlocking lever 19 to rotate clockwise, causing the preset pin 22 to rotate.
It is pushed to the right against an unillustrated diaphragm spring disposed inside the lens.

As a result, the diaphragm of the photographing lens is kept open regardless of the position of the preset ring 3 by the counterclockwise rotation bias of the diaphragm operating lever 10 within the camera body. In the above state, when the shutter button (not shown) on the camera body is pressed down, the aperture operating lever 10 is rotated clockwise by a known mechanism, so that the stored spring 23 is An automatic aperture interlocking mechanism or a known aperture spring in the lens operates to narrow down the aperture.

That is, the preset pin 22 is moved to the left by the narrowing spring, and the preset pin 22vC. more second
Since the interlocking lever 19 rotates counterclockwise, the interlocking rod 21 rotates counterclockwise due to the force pushed by the second interlocking lever 19 and the biasing force of the spring 23, and the first interlocking lever 21 rotates counterclockwise. 16 counterclockwise. First interlocking lever 1
6 rotates the 0-type lever counterclockwise until the preset pin 22 is locked by the preset ring 3vc. In other words, the movement of the automatic diaphragm interlocking mechanism is
This is suppressed by the aperture aperture preset by the preset ring 3. In addition, in the case of an aperture EE camera, the aperture is automatically reduced in accordance with the clockwise rotation angle of the aperture operating lever 10 which is locked by the EE mechanism until the aperture is stopped. After the subsequent exposure by the shutter mechanism,
The aperture operating lever 10 rotates clockwise, and the preset pin 22 is pushed to the right by the above-described series of operations of the automatic aperture mechanism, and the aperture returns to its open state.

Next, the case of changing the camera body 1 from the horizontal position to the vertical position will be described with reference to FIGS. 4 and 6.

In FIGS. 1 and 2, loosen the lock screw 8 and
When the inner cylinder 6 is made rotatable relative to the outer cylinder part 5a and the camera body 1 is manually rotated clockwise when viewed from the photographing lens 2 side, the inner cylinder 6 is rotated relative to the outer cylinder part 5a. The O-shaped lever 12, which is pivotally supported by the shaft 13 on the inner cylinder 6, also rotates integrally with the cam plate 12b and the cam plate 12b.
2c also rotates, and until then, as shown in FIG. 4, the cam plate 12
Conversion pin 1 engaged with cam portion 12b1 on the outer peripheral surface of b
The engaging portion 4a moves along the cam portion 12b1, but at this time, the cam portion 12b1 is on a concentric arc centered on the optical axis P, so the conversion pin 14a moves along the cam portion 12b1. Therefore, the automatic aperture interlocking mechanism from the conversion lever 14 to the preset pin 22 of the photographic lens 2 remains stationary, the aperture is kept open, and only the camera body 1 is attached to the fixed frame 5. It will be rotated. When the camera body 1 is rotated approximately 45 degrees clockwise from its horizontal position, the conversion pin 14a is moved from the cam plate 1.
2b is disengaged from the cam portion 12b1, or at this time the other conversion pin 14b engages with the cam portion 12c1 formed on the inner peripheral surface of the cam plate 12c as shown in FIG.

At this time, since the cam portion 12b1 and the cam portion 12c1 are on a concentric arc centered on the optical axis P, as the camera body 1 rotates, the cam portion and the conversion pin may engage with each other, or the cam plate 12
The conversion lever 14 is designed to be positioned so as to remain stationary relative to the fixed frame 51fC even when changing from the conversion pin 14a that engages with the cam plate 12c to the conversion pin 14b that engages with the cam plate 12c.

When the camera body 1 is rotated beyond the above-mentioned 45, the conversion pin 14b engages with the cam portion 12c1 and slides so as to remain stationary with respect to the conversion lever 14 or the fixed frame 5. And the camera body 1 is completely V than the state shown in Figure 4.
When rotated from C9O to the vertical position, the aperture operating lever 10
From, interlocking rod 21vC. The automatic aperture interlocking mechanism is the 6th
As shown in the figure, the relationship from the interlocking rod 21 to the preset pin 22 maintains the state shown in FIG. 3. Therefore, the type 0 lever 12 is the diaphragm actuating lever 10 (FC.
The conversion pin 14b is pushed downward in FIG. 6 by the cam portion 12c1 on the inner circumferential surface of the cam plate 12c, and the conversion lever 14 receives the counterclockwise rotational force. Just as when the camera body 1 is in the horizontal position, the aperture of the photographic lens is kept open.

The aperture closing operation associated with the shutter release operation in the vertical position and the return opening operation of the aperture after exposure are also substantially the same as in the horizontal position, so their explanation will be omitted. In exactly the same way as described above, when the camera body is in an intermediate position from the horizontal position to the vertical position, the automatic aperture mechanism is similarly operated. Next, FIG. 7 shows a second embodiment of the present invention.

In the drawings, the same parts as those in the first embodiment are designated by the same reference numerals, and explanations of these parts will be omitted. The inner cylinder 6 shown in FIG. 2 is rotatable around the optical axis P.
vc. The fitted cylindrical O-ring 101 is rotated clockwise (as viewed from the photographing lens 2) by a spring 102vC stretched between the inner cylinder and the inner cylinder. A plurality of conversion pins 101a that are biased and implanted in the 0-type ring 101 and extend in the direction of the photographic lens 2 in parallel with the optical axis P are engaged with a clutch member 104, which will be described later. It is possible.

Further, an interlocking pin 101b that is implanted so as to protrude from the O-ring 101 toward the camera body 1 is engaged with the aperture operating lever 10 in the camera body 1 similar to the first embodiment. A first interlocking lever 103 rotatably supported by a shaft 17 with respect to the fixed frame 5vc shown in FIG. The distal end thereof is fitted into an elongated hole 104avc formed in the clutch member 104.

As described above, the clutch member 104 is normally rotatable integrally with the first interlocking lever 103, and rotates together with the clutch member 104, and has the conversion pin 101 on the side thereof.
The clutch spring 105 is stretched between the clutch member 104 and the fixed frame 5, and the clutch member 104vC. , in FIG. 7, the clutch pin 103a is positioned at the lower end of the elongated hole 104a when the engaging portion 104b and any one of the conversion pins 101a are engaged.

The lower end of the clutch member 104 is bent rearward to form an operating portion 104c, and the clutch spring 10
5, the clutch member is operated to descend along a guide groove (not shown), etc., so that the engaging portion 104b and the conversion pin 1
01a, and is configured to be able to engage with the interlocking rod 21 and prevent its rotation.

Therefore, when the camera body 1 is in a horizontal position with respect to the fixed frame 5, the 0-type ring 101 is rotated counterclockwise against the spring 102 due to the counterclockwise rotation urging force of the aperture operating lever 10. The clutch member 104 is pushed to the right by the conversion pin 101avc, and the first interlocking lever 103, which is integrally coupled with the clutch member 104, receives a clockwise rotational force, as in the first embodiment. , the aperture in the photographic lens 2 is maintained in an open state against the spring and the spring 23.

Then, on the camera body 1 side, when the aperture operating lever 10 rotates counterclockwise against its habit in connection with the release operation, the aperture starts, and the aperture is preset by the preset ring 3. When the aperture lever 10 rotates back due to its habit in connection with the end of exposure after the aperture is stopped to the open position, the aperture is restarted.

Next, when rotating the camera body 1 with respect to the fixed frame 5 to change its position from its lateral position, the clutch member 104
By operating the operating portion 104c from outside the fixed frame 5, the clutch member 104 is moved so that the clutch pin 103a slides up inside the elongated hole 104a against the clutch spring 105.
When you press down, the engaging portion 104b of the clutch member 104
Then, the engagement with the conversion pin 101a is released. Therefore, the biasing force of the aperture actuation lever 10 no longer acts on the clutch member 104, and the first interlocking lever 103 is caused to react by the biasing force of the spring 23 of the interlocking rod 21 and the constriction spring of the aperture (not shown). Although it cannot be rotated clockwise, the operation unit 10
4c is guided down by a guide groove (not shown) and prevents the rotation of the interlocking rod 21, so that the rotation of the first interlocking lever 103 and the second interlocking lever 19 is also prevented, and the diaphragm is maintained in the open state. dripping Conversion pin 101a and clutch member 1
04 is disconnected, the lock screw 8 is loosened (this operation may be performed prior to operating the operating section 104c), and the camera body 1 is rotated.

As the camera body 1 rotates together with the inner cylinder 6, the type 0 ring 101 also rotates. When the conversion pin 101a that was previously engaged with the clutch member 104 retreats from its engagement position, the other conversion pin 101a engages the clutch member 104.
Rotate to a position where it can engage with. And the operation section 104c
When is released and the clutch member 104 is moved upward by the clutch spring 105, the above-mentioned engagement is performed and the first interlocking lever 103 (FC. Even in this position, the aperture operating lever 1 is activated in conjunction with the release operation.
The automatic diaphragm mechanism is actuated by the clockwise rotation of 0, and the diaphragm is closed to a preset aperture opening and returned to an open aperture associated with the end of exposure.

In the above embodiment, only the lens moving frame is movable in the optical axis direction, but the fixed frame may also be movable in the optical axis direction along the guide rail.

As described above, according to the present invention, the bellows device to which the photographing lens is attached remains stationary, and by rotating the camera body, the camera body can be adjusted to its lateral position relative to the bellows device. It can be rotated to any angular position including the vertical position, and the automatic aperture mechanism between the camera body and the photographic lens can be maintained in an interlocking relationship in any position, so the viewfinder is always bright and in one field of view. , distance adjustment, and exposure adjustment.
This provides a special effect in that the bellows device can be placed in a stable position and photography can be stably performed in any camera posture.

[Brief explanation of drawings]

FIG. 1 is an external side view of an embodiment of the present invention, and FIG.
3 is a perspective view showing the configuration of the main parts of the same embodiment, FIG. 4 is a front view of the main parts when the camera body is in the horizontal position, and FIG. 5 is the same as above. Figure 6 is a front view when the release operation has been performed and the aperture operation has been performed, Figure 6 is a front view when the camera body has been rotated from the horizontal position in Figure 4 to the vertical position, and Figure 7 is the front view when the camera body is rotated from the horizontal position in Figure 4 to the vertical position. FIG. 4 is a perspective view of main parts corresponding to FIG. 3 of another embodiment of the invention. In the figure, 1... Camera body, 2...
・Photographing lens, 5...Fixed part, 10...
・Aperture operating member of camera body, 12, 12a, 12b,
12c...Movable member, 14, 14a, 14b.
...Aperture control member, 101, 101a, 101b
......Movable member, 104, 104a, 104b.
...Aperture control member.

Claims (1)

[Claims] 1. A lens mounting part to which a photographing lens having an aperture preset pin positioned according to the aperture aperture diameter is mounted, a fixed part that moves relative to the lens mounting part in the optical axis direction, and a lens mounting part and the fixed part. A camera body to which a camera body is attached, which has a connecting bellows and an aperture actuating lever that is rotatably connected to a fixed part and comes into contact with an aperture preset pin to displace the aperture preset pin when a photographic lens is attached. a device section, an interlocking member disposed within the camera body device section and displaced in conjunction with the aperture operating lever of the attached camera body, and an interlocking member disposed within the fixing section to control the displacement of the interlocking member attached to the lens attachment section. a transmission means for transmitting the transmission to the aperture preset pin of the photographing lens; at least two interlocking parts provided on the interlocking member for imparting substantially equal displacement to the aperture preset pin in response to displacement of the aperture actuation lever; and the transmission means. automatic diaphragm interlocking in a bellows device with a rotating mechanism, characterized in that it has a transmission member that is provided in the interior and selectively comes into contact with the interlocking section depending on the relative rotational position between the fixed section and the camera body mounting section. mechanism.