JPS6210743Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a synchro actuating device for a camera.

For example, a camera's synchro operating device is generally linked to the opening/closing mechanism of the shutter blade so that a flash or the like flashes in synchronization when the shutter blade is fully opened.

However, with the above-mentioned configuration, the shutter blade opening/closing mechanism can interlock the synchro actuating device not only during the exposure operation of the shutter blade, but also during the shutter setting operation.

However, the synchro actuating device needs to flash a flash in synchronization only with the exposure operation of the shutter blade, and does not need to flash during other operations.

For this reason, various synchro actuating devices suitable for the above-mentioned purpose have been proposed in the past, but these devices have drawbacks such as being large and complex.

The present invention has been made in view of the above-mentioned points, and is intended to provide a synchro actuating device that is simple and compact.

Its structure is characterized by a synchronized lever member that performs two types of operations in conjunction with the exposure operation and shutter setting operation of the shutter blade.
The synchronizing contact piece member is made to work effectively by the operation of 1 to flash a flash, etc., and the synchronizing contact piece member is not made to work effectively by the operation of the other 1 which is linked to other actions.

The present invention will be explained below based on an embodiment shown in the drawings.

First, referring to FIG. 1, a blade opening/closing control mechanism of a program shutter to which a synchro actuating device according to the present invention is applied will be explained. Note that the synchro actuating device is not shown in FIG.

In the figure, reference numeral 1 denotes a rear frame, and a long groove 1a is formed through which a pin 2b of a sector ring (not shown) passes. Reference numeral 3 designates a shutter blade, one of which is one of a set of three shutter blades, which also serves as an aperture blade, and is opened and closed by a pin 2a of the sector ring.

11 is a settling ring arranged so as to be rotatable,
Bends 11a, 11b and arms 11c, 11d are formed, pins 11e, 11f, 11g are installed, and a spring 12 provides dextrorotation.

Reference numeral 13 denotes an opening/closing lever pivotally connected to a shaft 14, which has a forked portion 13a and a convex portion 13b for holding the pin 2b, and has a pin 13c implanted therein which can be restrained by the arm 11d. The opening drive spring 15 provides dextrorotation. Reference numeral 16 denotes a closing drive lever pivotally connected to the shaft 17, and the convex portion 13b is provided on the lower side.
A pin 16a that engages with the other pin 16 on the upper side.
In addition, an arm 16c and a bend 16d that can be pushed by the pin 11e are formed, and a spring 18 provides dextrorotation. Reference numeral 19 denotes a closing release lever pivotally connected to a shaft 20, which forms an arm 19a capable of restraining the bending 16d, has a pin 19b installed therein, and is provided with levorotatory properties by a spring 21. Reference numeral 22 denotes an intermediate lever pivotally attached to a shaft 23, which forms a fork-shaped portion 22a and an arm 22b that clamps the pin 19b.

Reference numeral 24 denotes an iron piece lever pivotally connected to the shaft 25, and the arm 2
4a and another arm 24b. 26 is an iron piece. 29 is a hold lever pivotally connected to the shaft 25, which forms an arm 29a that engages with the pin 11f of the settling ring 11, and also serves as the arm 29a that engages with the pin 11f of the setting ring 11.
A pin 29b that can push the arm 24b of No. 4 is implanted,
Further, the spring 30 provides levorotation. 3
1 is a spring hung between the hold lever 29 and the iron piece lever 24, and mainly acts to give right turning force to the iron piece lever 24.

Next, with reference to FIG. 2, the relationship between the blade opening/closing control mechanism and the synchro actuating device according to the present invention will be explained.

In the figure, 6 is a support plate with a bend 6c and a hole 6d.
A step portion 6e is formed, and a pin 6f is implanted therein.

34 is a set lever mounting plate fixed on the support plate 6, forming a bend 34a. A first set lever 35 is pivotally mounted on the bend 6c by a shaft 36, and forms arms 35a and 35b.
A second set lever 37 is pivotally mounted on the bend 34a by a shaft 38, and forms a cam surface 37a that can be pushed by the arm 35b, and also pushes the bend 11a of the set ring 11. A movable pin 37b is installed, and a spring provides levorotation.

40 is a release lever pivotally connected to the shaft 41;
An arm 40a bent in an L shape toward the rear frame 1 side and an operating arm 4
0b, and the arm 40a is provided with an arcuate surface 40a' that engages with the bending 11b of the settling ring 11, and an end surface 40a'' that can restrain the bending 11b,
Also, a spring 42 provides levorotation.

Further, according to the feature of the present invention, 43 is a first synchro lever pivotally connected to the shaft 41, and an arm 43a and a bend 43b are formed to be bent in an L-shape toward the rear frame 1 side,
Pin 1 of the closing drive lever 16 is attached to the arm 43a.
A long groove 43a' into which the groove 6b is fitted is provided.
A second synchro lever 44 is rotatably and slidably disposed on the pin 6f, and has an arcuate surface 44a that can be pushed by the bending 43b and an end surface 44b that can be pushed by the bending 43b. At the same time, a pin 44c and a pin 44d which protrudes vertically and whose lower part engages the step part 6e are implanted, and a spring 45 hung on the pin 6f and the upper part of the pin 44d is attached to the first synchro lever 43 side. It has been given the habit of moving towards. Reference numeral 46 designates a synchronizer fixing contact piece directly attached to the lens barrel support plate 6, and forms a rotation prevention bend 46a that fits into the hole 6d. Reference numeral 47 denotes a movable synchro contact piece that is insulated and attached to the support plate 6, and engages with the pin 44c to impart levorotatory properties to the second synchro lever 44. 50 is an electromagnet.

Next, the operation of the above configuration will be described.
The synchro actuator will be explained in detail in FIG.

First, the setting operation begins with the arm 35a as shown in FIG.
This is done by operating the first set lever 35 to the left, and pushing the cam surface 37a with the arm 35b to rotate the second set lever 37 to the right against the tension of the spring.

That is, as the lever 37 rotates to the right, the pin 37b is displaced, and the bending portion 11a of the settling ring 11 is pushed, and the settling ring 11 is rotated to the left against the tension of the spring 12.

As the settling ring 11 rotates to the left, the bending part 11b pushes on the radial surface 40a' of the arm 40a, and the arm 11d intervenes in the right-handed rotation locus of the pin 13c midway through, causing the opening/closing lever 13 to rotate to the right. When the bend 11b finally faces the end surface 40a'', the release lever 40 rotates to the left due to the tension of the spring 42, and the end surface 40a'' intervenes in the return trajectory of the bend 11b, thereby restraining it at the set position. However, during the left rotation process, the following actions occur.

First, as shown in FIG. 1, when the pin 11g is retracted, a measurement operating lever (not shown) is operated, and a generally known trigger switch (not shown) is brought into conduction.

Further, since the pin 11e pushes the arm 16c, the closing drive lever 16 rotates to the left against the tension of the spring 18, and the accompanying displacement of the bending 16d allows the arm 19a to intervene in the closing release lever 19. At the same time, the pin 16a becomes the convex portion 13b.
This allows the opening/closing lever 13 to rotate to the right. Further, the first synchro lever 43 is rotated to the right due to the fitting relationship between the pin 16b and the long groove 43a'. (The operation linked to the first synchro lever 43 will be explained in detail in FIG. 3).

Furthermore, since the pin 11f comes off from the arm 29a,
The hold lever 29 is rotated to the left by the tension of the spring 30, and the iron piece lever 24 is also turned to the left by the relationship between the pin 29b, the arm 24b, and the spring 31, and the iron piece 26 is pressed against the iron core 28 of the electromagnet.

Further, due to the displacement of the arm 24a caused by the counterclockwise rotation of the iron piece lever 24, the closing release lever 19 is moved by the spring 21.
The tension causes the intermediate lever 22 to rotate clockwise and counterclockwise, and the arm 19a intervenes in the return trajectory of the bend 16d in the closing drive lever 16.

On the other hand, according to the feature of the present invention, as shown in FIG. 3, the bending 43b pushes the circular arc surface 44a by the right rotation of the first synchro lever 43 (as shown by the two-dot chain line A in FIG. 3). , the second synchro lever 44 moves to the left against the tension of the spring 45 so that the lower part of the pin 44d slides on the step 6e of the barrel support plate 6 (double-dashed line B), and bends 43b. When it faces the end portion 44b (two-dot chain line A'), the tension of the spring 45 returns it to the state shown in the figure. During this time, the movable contact piece 4
The position of 7 hardly changes.

Then, in this state, the operation of the first set lever 35 is released, and the second set lever 37 is released from the spring 39.
The setting operation is completed when it rotates to the left due to the tension and returns to the state shown in the figure (FIG. 2).

Next, in the photographing operation, the release lever 40, which has been rotated to the right compared to the state shown in FIG. Spring 12 of ring 11
However, before that, the electromagnet was energized and the iron core 28 was rotated to the right by the iron piece 2.
The following operation will be described assuming that 6 is being held by suction.

As the settling ring 11 rotates to the right, the pin 11 first
f begins to push the arm 29a and rotates the hold lever 29 to the right against the tension of the spring 30, and the iron piece lever 24
The spring 31 which becomes the right turning force is charged. Next, the pin 11g returns a measurement operating lever (not shown) to start measuring the exposure time. Next, arm 11
d comes off from the pin 13c, so the opening/closing lever 13
is rotated to the right by the tension of the opening drive spring 15, and the sector ring is rotated to the left by the fitting relationship between the fork portion 13a and the pin 2b of the sector ring, thereby opening the shutter blade 3 which also serves as an aperture blade.

Then, after a predetermined time, when the electromagnet is demagnetized and the magnetic force disappears in the iron core 28, the iron piece lever 24 is rotated to the right by the tension of the spring 31, and the arm 24a is rotated to the right.
b to rotate the intermediate lever 22 to the left. Accordingly, the closing release lever 19 is rotated to the right against the tension of the spring 21 due to the fitting relationship between the pin 19b and the prong 22d, and the arm 19a is removed from the bend 16d. As a result, the closing drive lever 16 is moved by the spring 18
It rotates to the right due to the tension of the convex portion 13 due to the pin 16a.
b is pushed to rotate the opening/closing lever 13 to the left against the tension of the spring 15 to close the shutter blade 3 from the middle of opening or from the fully open position.

In addition, according to the feature of the present invention, the first synchro lever 43 is rotated to the left from the state indicated by the two-dot chain line A' in FIG. 44b to rotate the second synchro lever 44 to the right and bring the movable contact piece 47 into contact with the fixed contact piece 46. Therefore, when the flash device is ready for use, the flash emits light near the maximum opening of each of the shutter blades 3. Note that when the synchronizer movable contact piece 47 passes the bend 43b from the end portion 44b, the synchro movable contact piece 47 is displaced by its own elasticity so as to return the second synchro lever 44 to the illustrated state, and is separated from the synchro fixed contact piece 46.

As is clear from the above, according to the synchro actuating device according to the present invention, the second synchro lever 44 slides to the left as the first synchro lever 43 rotates to the right, biasing the movable contact piece 47; The amount of sliding is small and the movable contact piece 47 cannot be brought into contact with the fixed contact piece 46. Therefore, during the shutter setting operation, the flash will not flash.
On the other hand, the second synchro lever 44 is rotated clockwise by the left rotation of the first synchro lever 43;
can be contacted. Therefore, the flasher flashes in conjunction with the closing operation of the shutter blade.

In the above-mentioned embodiment, a case has been described in which the synchronizer actuating device according to the present invention is linked to a program shutter, but it is needless to say that the present invention is not limited to this.

In other words, in this embodiment, the case where the flasher flashes in conjunction with the closing member of the shutter blade has been described, but it is also possible to implement this method for a type of shutter in which the flasher, etc. flashes in conjunction with the opening member. Of course.

Furthermore, it goes without saying that the configuration of the synchro actuating device is not limited to this embodiment. For example, the left-turning force of the second synchro lever may be biased by another spring member. In this case, it is not necessary to keep the pin 44c of the second synchro lever and the movable contact piece 47 in constant contact, and when the second synchro lever operates linearly, the pin 44c and the movable contact piece 47 are in contact with each other. You can prevent it from happening.

Since the present invention has the above-described configuration, malfunction of the synchro actuating device cannot occur, and the flashes can be synchronously flashed when necessary.

Furthermore, since the synchro actuating device according to the present invention has a simple configuration, it can be applied to extremely miniaturized cameras, the demand for which has been increasing recently.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the blade opening/closing control mechanism, Fig. 2 is a plan view showing the interlocking relationship between the blade opening/closing control mechanism and the synchronized actuating device according to the present invention, and Fig. 3 is the synchronized actuation shown in Fig. 2. FIG. 3 is an explanatory diagram of the operation of the device. 3...Shattering blade, 11...Settling,
13... Opening/closing lever, 35, 37... Set lever, 40... Release lever, 43... First synchro lever, 44... Second synchro lever, 46
...Fixed contact piece, 47...Movable contact piece.

Claims (1)

[Claims for Utility Model Registration] (1) A first synchro lever member that reciprocates in conjunction with the shutter charge operation and exposure operation of the shutter blade, and the rotational movement and the above-mentioned movement due to the relationship between the shaft and the elongated hole. a second synchro lever disposed so as to be linearly movable so as to move in and out of the movement locus area of the first synchro lever; and a synchro contact piece member whose closing is controlled only by rotational movement of the second synchro lever. At least one of the acting parts of the first synchro lever and the second synchro lever is provided with a cam surface, and the forward movement of the first synchro lever corresponding to the shutter charging operation causes the first synchro lever to When the first synchro lever abuts the second synchro lever, the second synchro lever is moved linearly by the action of the cam surface;
Further, when the first synchro lever comes into contact with the second synchro lever due to the return movement of the first synchro lever corresponding to the exposure operation, the pushing action by the substantially flat end surface that terminates the cam surface is applied. Therefore, the second synchro lever is rotated, and the second synchro lever is rotated by the first synchro lever.
The direction that falls within the movement trajectory of the synchro lever,
A focal plane shutter characterized in that it has a behavior of operating in a direction that opposes pushing and striking. (2) The synchro operating device for a camera according to claim 1, wherein the exposure operation of the shutter blade is an opening operation of the shutter blade. (3) The synchro operating device for a camera according to claim 1, wherein the exposure operation of the shutter blade is a closing operation of the shutter blade.