JPH0533363B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tilt lens that has a lens shutter and can be tilted in all directions, and in particular,
The present invention relates to a tilt lens with a lens shutter, in which the lens shutter can be charged and released from the camera body side in any tilt condition.

[Conventional technology]

Most medium and large format cameras using Brownie film have a lens shutter rather than a focal plane shutter due to the impact and noise associated with shutter operation and the synchronization time of a strobe.

On the other hand, in medium- and large-format cameras, image deformation is prevented by shifting, rising, and falling (hereinafter collectively referred to as "shift"), which move the optical axis of the photographing lens left, right, up, and down from the center of the screen while keeping it perpendicular to the screen. , tilt and swing (hereinafter referred to as ``tailt'') where the optical axis is tilted vertically and obliquely to the screen.
) to compensate for the lack of shift amount,
There are many cases where a so-called tilt function is required to take a sharp picture of an inclined subject with the aperture wide open.

Conventionally, cameras that have a shift and tilt tilt mechanism and that allow the built-in lens shutter to be charged and released from the camera body side have two shift positions on the lens barrel that shift in two directions: left and right and up and down. A mechanism is known in which a mechanism is provided and motion transmitting means such as a plurality of universal joints are provided inside the lens barrel (for example, US Pat. No. 4,229,094).

[Problem that the invention seeks to solve]

However, in the case of such a conventional tilt lens with a lens shutter, the shift mechanism is provided in two places, so there is a lot of light vignetting due to the lens barrel, and to avoid this, the inner diameter of the rear lens barrel must be significantly I needed to make it bigger.

Furthermore, since the shift directions are two orthogonal directions, there is a problem in that the outer diameter of the lens barrel must be increased in order to ensure that both shift members overlap with each other in order to shield light.

Furthermore, since the shift direction is limited to two directions and the tilt direction is limited to one direction, there is a drawback that the tilt direction, which is a combination of both directions, is also limited.

The present invention is intended to solve these problems in the conventional tilt-and-shift lens with a lens shutter.

[Means for solving problems]

Therefore, the tilt lens with lens shutter according to the present invention is provided with a rotating part, a shift part, and a tail part in order from the mount side, and the first interlocking member provided in the lens barrel rotating part moves together with the shutter driving member on the camera body side. When the lens barrel is rotated, the transmission member and the lens barrel fixing portion and the first
A rotating part interlocking means configured to prevent relative rotation between the interlocking member and the lens barrel rotating part, and a second interlocking member provided in the lens barrel shift part interlock with the first interlocking member, and the lens barrel a shift part interlocking means for moving the second interlocking member together with the lens barrel shift part while maintaining connection with the first interlocking member during shifting; and a third shift part interlocking means for operating a lens shutter provided on the lens barrel tail part. The interlocking member interlocks with the second interlocking member, and when the lens barrel is tilted, the second and third interlocking members interlock with the second interlocking member.
and a tail section interlocking means for relatively displacing the interlocking member in the tail direction without changing the connection state in the rotational direction.

[Effect]

With the above configuration, the movement of the shutter drive member on the camera body side is transmitted to the transmission member of the lens barrel fixing part, the first interlocking member of the lens barrel rotating part, the second interlocking member of the lens barrel shifting part, and The third part of the lens barrel tail section
It can be transmitted to the lens shutter of the lens barrel tail section through the interlocking member, and can be charged and released from the camera body side.

When the lens barrel is shifted and tilted, the interlocking members of the shutter interlocking means maintain a normal connection state with each other, so that the shutter can be operated by freely shifting and tilting at any time.

Rotation of the lens barrel is not possible unless the connection between the first interlocking member and the transmission member is broken, but in that case, the transmission member and the lens barrel fixing portion, and the first interlocking member and the lens barrel rotating portion must be prevented from rotating relative to each other. Therefore, when the first interlocking member and the transmission member are connected again after the lens barrel has been rotated, the shutter can be operated without any positional deviation.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, the schematic structure of the tilt lens with lens shutter according to the present invention will be explained with reference to FIG. a barrel fixing part 5; a barrel rotating part 6 which is rotatably attached to the barrel fixing part 5 and can rotate a total of 180 degrees at 90 degrees in opposite directions about the origin as shown by arrow A; , a lens barrel shifter 7 which is slidably mounted on the lens barrel rotation unit 6 perpendicular to the lens optical axis L and is movable in parallel a predetermined distance as shown by arrow B around the origin, and a lens barrel shifter. A lens shutter 9 and a photographic lens 1 incorporated in this lens shutter are slidably attached to a tail shaft 8 of a lens shutter 7.
0 built-in, the lens optical axis L can be tilted in the same plane as the predetermined angle shift direction as shown by the arrow C centering on the origin, and a light shielding member 11 is provided between the lens barrel shift section 7 and the lens barrel shift section 7. Sliding lens barrel tail section 12
By combining these, tilting in all directions is possible.

On the other hand, the drive shaft 13 on the camera body 3 side is connected to the shutter drive member 16 via a margin angle spring 14 and a pinion 15 that absorb rotational force during overcharge, and is rotatably provided inside the lens barrel fixing part 5. coupled to the connecting pin 18 of the connected connecting ring 17,
By rotating in the directions of arrows E and F, the lens shutter 9 is charged and released via the rotating section interlocking means R, the shift section interlocking means S, and the tail section interlocking means T.

Next, specific examples of these interlocking means will be explained in detail with reference to FIGS. 2 and 3. For convenience of illustration, the positional relationship between FIGS. 2 and 3 does not necessarily correspond, and FIG. 3 shows the lengths of the members extending in the optical axis direction greatly enlarged.

A shutter drive member 1 on the camera body side is inserted into the lens barrel fixing part 5 (FIG. 2) via a connecting pin 18.
The already mentioned connecting ring 17 that moves together with the rotary cylinder 19 is integrally fixed to the rotating cylinder 19, and
The outer periphery of the rotary seat 21, which is integral with the mount 1, is rotated through the mount 1.

Two clutch claws 2 are provided on the outer periphery of the rotating cylinder 19.
Clutch tubes 22 having 2a are rotated 90 degrees (total 180 degrees) in opposite directions around the optical axis L, centering on the origin.
The clutch pawl 22a is rotatable and slidable within a predetermined range in the optical axis direction, and the clutch pawl 22a normally fits loosely into the arc-shaped elongated hole 17a of the connecting ring 17 and moves together in the rotational direction. The rotation seat 2 protrudes from the elongated hole 17a by moving toward the rear (the camera body side is referred to as "backward" and the subject side is referred to as "front").
1, thereby preventing rotation of the clutch cylinder 22.

A clutch pin 23 is installed facing forward in the clutch cylinder 22, and a flange 24a of a clutch actuating plate 24 that slides in the optical axis direction is loosely fitted into a circumferential groove 22c provided in an outer circumferential step 22b. , Kurachitsu tube 22
They are designed to be able to rotate relative to each other and move together in the optical axis direction.

The connecting pin 18, the connecting ring 17, the clutch tube 22, and the clutch pin 23 are transmission members on the lens barrel fixing portion side that move together with the shutter drive member 16 on the camera body side.

The clutch actuating plate 24 is slidably attached to the lens barrel rotating part 6 in the optical axis direction by a guide part (not shown), and its front end part 24b has a T-shape, and two guide pins 25 are implanted therein. This guide pin 25 is slidably and loosely fitted by a spring 26 into a cam groove 27a of a clutch operating plate 27 having leftward movement.

A clutch operating knob 28 that protrudes outside the lens barrel is attached to the rising portion 27b of the clutch operating plate 27, and movement of the clutch operating knob 28 in a direction perpendicular to the optical axis L causes the clutch operating plate 24 to move in the optical axis direction. do.

The clutch actuating plate 24 further includes a rising portion 24c.
and a falling portion 24d, and a rising portion 24c.
is a rotation locking ring 2 fixed to the lens barrel fixing part 5.
The falling portion 24d is rotatably attached to the front outer circumference of the rotary tube 19. It can be freely engaged with and detached from the outer peripheral notch 30a of the clutch ring 30, which is the first interlocking member on the lens barrel rotating section 6 side.

Further, a cutout groove 29b provided on the outer circumferential portion of the rotation locking ring 29 regulates the rotational position of the lens barrel rotating portion 6 in correspondence with the locking groove 29a.

The clutch ring 30 is provided with the same number of clutch grooves 30b along a semicircumference at the same intervals as the locking grooves 29a of the rotary locking ring 29 on the inner circumference of the clutch ring 30. As a result, the clutch pin 23 engages and disengages from one of the clutch grooves 30b.

The lens barrel rotating section 6 has a linear guide section 31 (Fig. 2).
The lens barrel shifter 7 is mounted so as to be slidable a predetermined distance from the origin shown perpendicular to the optical axis L, and a shift screw 33 is rotatably attached to a screw base plate 32 protruding from the lens barrel rotating portion 6. This shift screw 33 is screwed into a threaded portion (not shown) provided on the lens barrel shift section 7, and by rotating a shift knob 34 that is integrated with the shift screw 33, the lens barrel shift section 7 is It moves in a direction perpendicular to the optical axis L with respect to the trunk rotating part 6.

A shift gear 35 is integrally fixed to this shift screw 33, and this shift gear 35 meshes with a shift interlocking gear 36 having the same diameter.

The shift interlocking gear 36 is fixed to a shift interlocking shaft 38 that is pivotally supported by an interlocking screw base plate 37 that is integral with the screw base plate 32, and extends through the lens barrel rotating portion 6 to form teeth parallel to the axial direction. It is integrated with the elongated shift interlocking pinion 39. In addition, in FIG. 3, the intermediate portion of this shift interlocking pinion 39 is omitted from illustration.

A moving frame 40 is slidably provided in a guide path (not shown) of the lens barrel rotating section 6 in parallel with the shift interlocking pinion 39, and a moving frame screw having a reverse thread of the same pitch as the shift screw 33 is provided on the moving frame 40. 41 is fixedly fixed in parallel to the shift screw 33, and a shift co-movement gear 42 which meshes with the shift interlocking pinion 39 and has the same diameter as the shift interlocking pinion 39 is screwed onto this moving frame screw 41.
A gear frame 43 is provided which rotatably holds this shift co-moving gear 42 and moves in the longitudinal direction of the movable frame screw 41 together with the shift co-moving gear 42. The frame 43 is configured to move.

The moving frame 40 has a moving frame pin 44 parallel to the optical axis L.
is implanted toward the rear, and its tip is loosely fitted into the radial groove 30c of the clutch ring 30, and the gear frame pin 45, which is parallel to the optical axis L, is similarly installed in the gear frame 43 in the forward direction. The distal end is connected to a second rotatably provided in the lens barrel shift section 7.
The movable frame pin 44 and the gear frame pin 45 are loosely fitted into a groove 46a having the same phase as the groove 30c of the shift interlocking ring 46, which is an interlocking member, and are on the same line in the illustrated state in which they do not shift.

A driving piece 47 and a driving pin 48 are respectively implanted toward the front in the shift interlocking ring 46, and the driving piece 47 is a third interlocking member rotatably attached to the lens barrel tail portion 12, which is a tail interlocking ring. 49, and the drive pin 48 is connected to a pin 51 of the tail interlocking ring 49 via a spring 52, and is shown by arrow E in FIG. For clockwise rotation as shown, the drive piece 47 presses the interlocking piece 50 to transmit a charge force, and for anticlockwise rotation as shown by arrow F in FIG. 3, which is the release direction, the spring 52, the tail interlocking ring 49 rotates following the shift interlocking ring 46 while the driving piece 47 and the interlocking piece 50 remain engaged.

Here, the interlocking piece 50 is formed in an arc shape centered on the tail shaft 8, as clearly shown in FIG. 2, and engages with the driving piece 47 at a surface 50a (see FIG. 3) in the shutter release state. is located on a plane that includes the optical axis L and is orthogonal to the tail axis 8. Therefore, in any state in which the lens barrel tail portion 12 rotates around the tail axis 8, the shift interlocking ring 46 and the tail interlocking ring 49 are always in the same state of engagement, and no relative rotation occurs between them due to the tail operation.

A shutter driving piece 49a is formed toward the front of the tail linking ring 49, and this shutter driving piece 49a engages with a notch 54a of a shutter operating ring 54 that rotates on the rear surface of the shutter 9, so that the shutter 9 can be charged and It is starting to be released.

Next, the operation of this embodiment will be explained.

2 and 3 show the shutter charging state at the origin without rotation, shifting, or tilting, and the first, second, and third interlocking members 30,
The central axes of 46 and 49 coincide with the optical axis L.

To rotate the lens barrel rotating section 6 (FIG. 2) from this state, first push the clutch operation knob 28 onto the spring 2.
6 in the direction of arrow G in FIG. 3 to move the clutch actuating plate 24 rearward in the optical axis direction.

As a result, the flange 24 of the clutch actuating plate 24
Since a causes the clutch cylinder 22 to retreat a predetermined distance,
The clutch pawl 22a is connected to the elongated hole 17a of the connecting ring 17.
The clutch pin 2 protrudes from the shaft and engages with the clutch groove 21a of the rotating seat 21, preventing the clutch cylinder 22 and the connecting ring 17 from rotating relative to the lens barrel fixing part.
3 and the clutch groove 30b are disengaged.

At the same time, the falling portion 24d of the clutch actuating plate 24
is engaged with the notch 30a of the clutch ring 30, the relative rotation between the clutch ring 30 and the lens barrel rotation part 6 is prevented, and the rising part 24c is disengaged from the locking groove 29a of the rotation locking ring 29. The lens barrel rotating section 6 becomes rotatable.

In this state, the lens barrel rotating section 6 is rotated in a required direction at a required angle relative to the lens barrel fixed section 5, and when the clutch operating knob 28 is released from the position where it is clicked into the rotation locking ring 29, the clutch operating knob 28 is released. 27
Since the clutch actuating plate 24 moves in the direction opposite to the arrow G due to the restoring force of the spring 26, the guide pin 25 of the clutch actuating plate 24 is driven by the cam groove 27a and moves forward.

As a result, the flange 24a of the clutch actuating plate 24
The clutch cylinder 22 that moves simultaneously moves forward, and the clutch pin 23 is connected to the corresponding clutch groove 30b of the clutch ring 30, and the clutch pawl 22a is disengaged from the clutch groove 21a of the rotary seat 21 and is inserted into the long hole of the connecting ring 17. It will be in a state where it engages only with 17a.

In this state, the movement of the clutch tube 22 in the optical axis direction is perpendicular to the clutch operation plate 27.
In addition, since the direction is changed via the cam groove 27a, when the clutch operation plate 27 is stopped, the movement of the clutch cylinder 22 in the optical axis direction is also stopped, and the heavy load of the shutter charge causes the clutch pin 23 to move into the clutch groove. There is no getting out of 30b.

Furthermore, the rising portion 24c of the clutch actuating plate 24
is fitted into the locking groove 29a of the rotation locking ring 29 to prevent rotation of the lens barrel rotating section 6, and the falling portion 24d is separated from the notch 30a of the clutch ring 30, allowing the clutch ring 30 to rotate. become a state.

Next, in order to shift the lens barrel shift portion 7, it is sufficient to rotate the shift knob 34 which is integrated with the shift screw 33, and the lens barrel shift portion 7 is moved to the linear guide portion 31.
, and moves linearly in a direction perpendicular to the optical axis L with respect to the lens barrel rotating section 6.

The rotation of the shift knob 34 causes the rotation of the shift gear 35, which is integrated with the shift knob 34, to cause the shift gear 36 to rotate.
The shift interlocking pinion 39, which is integral with the shift interlocking shaft 38, rotates in the opposite direction to the shift screw 33, and the shift synchronizing gear 42, which meshes with the shift interlocking pinion 39, rotates in the same direction as the shift screw 33.

Since the shift co-movement gear 42 is screwed into a moving frame screw 41 consisting of a reverse thread having the same pitch as the shift screw 33, the shift co-movement gear 42 moves in synchronism with the movement of the lens barrel shift section 7.

To perform the tilt operation, the lens barrel tail section 12 can be rotated in a desired direction relative to the lens barrel shift section 7 about the tilt axis 8 (Fig. 2) against frictional resistance. 49 and the shift interlocking ring 46 are lost, but the distance from the optical axis L to the position where the interlocking piece 50 engages with the drive piece 47 is always constant.

Now, when the shutter drive member 16 is rotated in the direction of arrow F by the release operation on the camera body side from the shutter charge state at the origin shown in FIG. 17. The clutch ring 30 moves together via the clutch cylinder 22.

As the clutch ring 30 rotates, the movable frame pin 44 is driven by the radial groove 30c and moves into the third position.
Since it moves to the left in the figure, the moving frame 40 moves to the left together with the shift synchronizing gear 42 and the gear frame 43, and the gear frame pin 4 moves to the left.
5, the shift interlocking ring 46 is rotated counterclockwise through the same angle as the clutch ring 30, and this rotation causes the tail interlocking ring 49 to rotate in the same direction and at the same angle, and the shutter driving piece 49a is rotated counterclockwise through the shutter operating ring of the lens shutter 9. The shutter is operated by rotating the shutters 54 in the same direction and the same angle.

When the shutter drive member 16 rotates in the direction of arrow E in FIG. 3 from the shutter release state due to the winding operation on the camera body side, the shutter is charged in the completely opposite path to that described above, but the shift interlocking ring 46 and the tail interlocking ring 49 are not follow-up like in the case of a release, but the driving piece 47
This is a forced drive due to the engagement between the interlocking piece 50 and the interlocking piece 50.

Here, when the lens barrel rotating section 6 is rotated from the state shown in FIG. 3, the coupling ring 17 and the clutch ring 30 only rotate integrally in a relatively rotated state, so the interlocking operation between them is It is exactly the same as in the original position.

In addition, in the state shown in FIG. 4 in which the lens barrel shift section 7 is shifted, the center axes of the clutch ring 30 and the shift interlocking ring 46 are shifted, and the moving frame pin 44 and the gear frame pin 45 are parallel to each other by the amount of shift of the center axes. Since the clutch ring 30 only moves, the shift linking ring 46 also rotates in the same direction and at the same angle via the moving frame 40 and gear frame 43 due to the rotation of the clutch ring 30.

Furthermore, even in the state shown in FIG. 5 in which the lens barrel tail section 12 is tilted, the rotation of the shift coupling ring 46 causes the tilt interlocking ring 49 to rotate.
The shutter drive member 16 on the camera body side moves at the same time, so even in any tilt position combining these
The rotation is directly transmitted to the shutter operating ring 54 on the lens shutter side, so that charging and releasing operations of the shutter are performed reliably.

Note that the play and deflection of each part of these interlocking mechanisms and the slight increase or decrease in the interlocking rotation angle that occurs during tilting can be easily absorbed by appropriately selecting the margin angle of the shutter drive section.

The interlocking mechanism of each part described above is suitable for cases where the lens shutter size is 1 or more and the force required for shutter charging is extremely large. Another embodiment of the present invention having a tail section interlocking mechanism suitable for use will be described with reference to FIGS. 6 and 7.

In these figures, the same parts as in FIG. 3 are denoted by the same reference numerals, and their explanation will be omitted.

When the shutter charge force is extremely large, all interlocking parts require the interlocking of rigid bodies.
This is not necessarily necessary if this force is not so large and the rotation angle is small, for example within 40 degrees.

That is, in FIG. 6, as a member for interlocking the shift interlocking ring 46 and the tail interlocking ring 49, a connecting piece 55 made of two U-shaped elastic metal plates (plate springs) is used to connect the two members. 55
Combine using . These two connecting pieces 55,5
5 are opposed to each other at 180 degrees apart, and protrude outward in parallel to the tail direction at the midpoint of their rotation, and are connected to both shift and tail interlocking rings 46,
The deflection of the connecting pieces 55, 55 when the connecting pieces 49 are rotated is minimized.

Therefore, the tailing operation only increases the curvature of the U-shaped portion of one of the two connecting pieces 55 and decreases the curvature of the other, as shown in FIG. 7, so the tilting operation is easy.

This connecting piece 55 is connected to the shift interlocking ring 4.
6 does not deform in the direction of rotation, the rotation is transmitted to the tail interlocking ring 49 at an equal angle.

Note that the other rotating part interlocking mechanisms and shift part interlocking mechanisms are the same as those in the previous embodiment.

In the above embodiments, the tilt lens with a lens shutter was explained. However, using these interlocking means, the tilt lens of a camera with a focal plane shutter can be used to control the aperture on the lens side by the aperture drive member on the camera body side. It can also be applied to mechanisms that drive.

〔effect〕

As described above, the tilt lens with a lens shutter according to the present invention has a rotation mechanism in addition to both the shift and tilt mechanisms, and shutter interlocking means are provided between each of these displacement parts, so that the conventional shift mechanism is not required. Unlike the case where the lens barrel is installed in two locations perpendicular to each other, the lens barrel does not need to be enlarged, and the tilt direction is not limited, making tilting in all directions possible.Also, the lens shutter can be charged from the camera body side in any tilting situation. It also has an excellent release effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the overall structure of the invention, FIG. 2 is a sectional view showing an embodiment of the invention, and FIG. 3 is an exploded perspective view showing the shutter interlocking means of each part. FIG. 4 is an exploded perspective view of a main part showing the shift part interlocking means in the same shifted state, FIG.
The figure is an exploded perspective view showing another embodiment of the invention.
FIG. 7 is an exploded perspective view of the main parts showing the tail section interlocking means in the same tilted state. DESCRIPTION OF SYMBOLS 1... Mount, 3... Camera body, 6... Lens barrel rotation part, 7... Lens barrel shift part, 9... Lens shutter, 12... Lens barrel tail part, 16... Shutter drive member, {17... ...Connection ring, 22...
Clutch cylinder, 23...Clutch pin} (transmission member), 30...Clutch ring (first interlocking member), 46...Shift interlocking ring (second interlocking member), 49...Tailing interlocking ring (third interlocking member) (interlocking member), R...Rotating part interlocking means, S...Shifting part interlocking means, T...Tailing part interlocking means, L...Photographing lens optical axis.

Claims (1)

[Claims] 1. A tilting lens with a lens shutter that has a rotation part, a shift part, and a tail part in order from the mount side to enable tilting in all directions, and the lens barrel fixed part side normally moves in conjunction with the shutter drive member on the camera body side. The transmission member and the first interlocking member on the side of the lens barrel rotation part are connected, and the rotation of the lens barrel rotation part is prevented, and when the rotation prevention is released, the connection between the transmission member and the first interlocking member is stopped. a rotating part interlocking means configured to disconnect and prevent relative rotation between the transmission member and the lens barrel fixing part, and between the first interlocking member and the lens barrel rotating part; and a second interlocking means interlocked with the first interlocking member. An interlocking member is provided in the lens barrel shift portion, and the second interlocking member is moved while maintaining connection with the first interlocking member in conjunction with movement of the lens barrel shift portion in the shift direction. a shift section interlocking means;
A third interlocking member that operates the lens shutter in conjunction with the second interlocking member is provided in the lens barrel tilt section, and when the lens barrel is tilted, the second and third interlocking members do not change the connection state in the rotational direction. 1. A tilt-and-shift lens with a lens shutter, characterized by having a tail section interlocking means for relative displacement in the tail direction.