JPS623788Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shutter setting and releasing mechanism, and more particularly to a shutter setting and releasing mechanism that allows various shutter setting and releasing operations to be performed with a small number of members.

The conventional shutter set and release mechanism is
Most of them had a mechanism in which the closing member and other parts were set in the charge state and released by other members via a set plate, which resulted in a considerable number of parts. It had drawbacks.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, the present invention seeks to provide a shutter setting and releasing mechanism that allows various parts of the shutter to be set in a charging state using various parts of the setting member.

An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 is a plan view showing an embodiment of the shutter mechanism according to the present invention in a stationary state, Fig. 2 is a plan view showing the set state of the shutter mechanism, and Fig. 3 is a plan view showing the shutter mechanism in the middle of opening. FIG.

In the figure, 1 is a base plate, 2 is a set plate guided by shafts 1a and 1b set on the base plate 1,
The set plate 2 has end faces 2a, 2b, and 2d, above which a pin 2c is planted, and a locking portion 2e and a vertically bent portion 2f are formed. Reference numeral 3 designates a set plate spring stretched between the shaft 1a set on the base plate 1 and the vertically bent portion 2f of the set plate 2, and applies a biasing force to the set plate 2 in the right direction. Reference numeral 4 designates an opening lever made of an insulating material such as plastic, which is set to be rotatable by a shaft 1c, and above which is a metal pin 4a, and below which is a blade 19 which will be described later.
The pins 4c that drive the
b, 4e, and a protrusion 4d. 5 is the opening direction (counterclockwise) with respect to the opening lever 4
It is an opening lever spring that gives a spring behavior to the opening lever spring, and one side is hooked to the terminal plate 1f of the molded member 1e insulated from the main plate 1, and this is used as one side of the synchro switch circuit, and the other side is planted on the opening lever 4 that is electrically connected to this. It is made to engage with the metal pin 4a which is erected.

The other side of the synchro circuit is connected to the ground plate 1.

SW ₁ is a timing switch that opens and closes in conjunction with the movement of the opening lever 4.

6 is a protrusion 6 set to be rotatable by the shaft 1d.
a closing lever with pins 6a and 6d;
is planted, and a vertically bent portion 6b is formed. 7
1 is a release iron piece lever which is set to be rotatable by a shaft 1d, and has an upright bent portion 7a formed therein. 7b is a release iron piece. A closing lever spring 8 is stretched between the closing lever 6 and the base plate 1, and provides a spring behavior to the closing lever 6 in the closing direction (counterclockwise direction).

Reference numeral 9 denotes a release iron lever spring which is stretched between the release iron lever 7 and the base plate 1 and gives a counterclockwise spring behavior to the release iron lever 7. Reference numeral 10 denotes a closing iron piece lever for locking the closing lever 6, which has a protrusion 10a and is set to be rotatable about a shaft 1b. 11 is the closed iron lever 1
This is a closed iron piece 11 that is supported with a wobble at 0, and 11a is the axis of the closed iron piece 11.

Reference numeral 12 denotes a closing iron piece spring that is stretched between the closing iron piece lever 10 and the closing iron piece 11 to bias the looseness. 13 is a hold lever set to be rotatable by a shaft 1b, and has protrusions 13a and 13b.
have. 14 is a closing iron lever spring stretched between the closing iron piece 11 and the hold lever 13.

15 is a hold lever spring stretched between the hold lever 13 and the base plate 1. 16 is a closing magnet for setting the exposure time, and 17 is a release magnet combined with a permanent magnet for electromagnetic release. SW ₂ is a winding switch for confirming shutter set. 18 is an aperture, and 19 is a set of two blades, one of which is omitted in the figure.

Now, from the stationary state shown in Fig. 1, set plate 2
When set to the left in the figure, the end surface 2a of the setting plate 2 first opens and enters the movement trajectory of the peak 4b of the lever 4, and as a result, the opening lever 4 is locked on the closed side. obtain. After that, the end surface 2b of the set plate 2 pushes up the pin 6a of the closing lever 6, and
Charge the closing lever 6. Also, at the same time, the protrusion 6c of the closing lever 6 moves the winding switch _SW2.
Press to turn on.

Also, in parallel with the above operation, pin 2 of set plate 2
Since c also moves to the left, the protrusion 13b of the hold lever 13 and the pin 2c planted on the set plate 2
The hold lever 13 is disengaged from the spring 15.
The spring force causes it to rotate clockwise.

When the hold lever 13 rotates clockwise,
When the protrusion 13a of the hold lever 13 closes, the iron piece 11
The closing iron piece 11 is pressed onto the closing magnet 16 by pressing the shaft 11a. At the same time, the closing iron lever 10 rotates clockwise following the closing iron piece 11, so that the protrusion 10a of the closing iron lever 10 enters the movement trajectory of the bent portion 6b of the closing lever 6.

Further, in parallel with the above operation, the end surface 2d of the set plate 2 pushes down the bent portion 7a of the release iron lever 7. Then, the release iron piece lever 7 rotates clockwise, and as a result, the release iron piece 7b is pressed against the release magnet 17, and is attracted and held by the permanent magnet.

As a result, the bent portion 7a of the release iron piece lever 7 enters the return locus of the locking portion 2e on the set plate 2, and even if the set plate 2 is released in this state, each of the above-mentioned locks remains in the completely set state. Then,
The shutter set is completed as shown in FIG.
Note that the spring 8 is not shown in FIG. 2.

Next, from the shutter set completion state shown in Figure 2, when the release lever (not shown) is pushed down, power is turned on to the circuit system (also not shown).
Enters brightness warning mode.

When the release lever is further pushed down, a release signal is input to the circuit system, and the power supply is latched until an exposure end signal is output, a release pulse is generated in the release magnet 17 shown in the figure, and the magnetic flux of the permanent magnet is canceled out.

As a result, the release iron lever 7 is moved by the spring 9.
The release iron lever 7 is rotated counterclockwise due to the tension thereof, and as a result, the locking relationship between the bent portion 7a of the release iron lever 7 and the locking portion 2e of the set plate 2 is released. Further, the closing magnet 16 is energized in synchronization with the release pulse.

As described above, when the engagement between the bent portion 7a of the release iron lever 7 and the engagement portion 2e of the set plate 2 is released, the tension of the spring 3 rotates the hold lever 13 counterclockwise against the tension of the spring 15, and the set plate 2 moves to the right while charging the spring 14. In the final stroke of the rightward movement of the set plate 2, the engagement between the peak 4b of the opening lever 4 and the end face 2a of the set plate 2 is released, and the opening lever 4 rotates counterclockwise (opening direction) due to the tension of the spring 5. When the opening lever 4 rotates, the blade 19 opens via the blade drive pin 4c planted below the opening lever 4 (see FIG. 3).

At the same time, the protrusion 4d of the opening lever 4 moves to the left, the timing switch _SW1 changes from the on state to the off state, and as a result, an electric circuit system (not shown) starts counting the exposure seconds.

When the above electric circuit system determines that the exposure time is appropriate,
The power supply to the closing magnet 16 is turned off, whereby the closing iron lever 10 is rotated counterclockwise by the tension of the charged spring 14.

When the closing iron piece lever 10 rotates, the locking relationship between the aforementioned protrusion 10a of the closing iron piece lever 10 and the bent portion 6b of the closing lever 6 is released, and as a result, the closing lever 6 is rotated counterclockwise by the tension of the spring 8. I will do it.

When the closing lever 6 rotates, the protrusion 6d of the closing lever 6 comes into contact with the pin 4a of the opening lever 4. This contact turns on the synchro circuit. Thereafter, the protrusion 6d of the closing lever 6 further pushes up the pin 4a of the opening lever 4, thereby causing the blade 19
is closing.

As the blade 19 further closes, in the final stroke of the closing operation, the protrusion 6d of the closing lever 6 transfers from the pin 4a of the opening lever 4 to the ridge 4e of the opening lever 4, and as a result, the synchro circuit is turned off. After each shutter operation is completed, the first
The shutter returns to its resting state as shown in the figure.

The power supply latch of the power supply circuit system (not shown) is released at the same time as the closing magnet 16 is turned off.

Also, the above explanation is for the normal shooting mode, but in the case of the self-timer mode, rotate the timer lever (not shown) to the self-timer position, then press the release lever to generate the release signal and turn on the power latch. However, the release pulse is issued after the self-timer has elapsed. Subsequent operations are similar to those in the normal shooting mode described above.

In the embodiment of the present invention, the closing control system iron members are the closing iron lever 10 and the closing iron piece 11.
and a closing iron piece spring 12 that connects the two, and the closing iron piece lever 10 is configured to close the closing lever 6.
Since the structure is such that the closing iron piece 11 is pressed by the hold lever 13, as the setting plate 2 returns to the set position after overcharging, the closing lever 6 is pressed against the closing iron piece lever. Since the movement that collides with the closing iron piece 10 is absorbed by the closing iron piece spring 12, the closing iron piece 11 can be reliably attracted to the closing magnet 16 without separating from it.

As explained above, according to the present invention, a simple mechanism consisting of few components, that is, a single setting plate, can charge the closing member, lock and release the opening member, and operate the magnet for the electromagnetic release. A feature of the present invention is that it can provide a shutter setting and release mechanism that is capable of attracting iron pieces, attracting iron pieces of an exposure magnet, and charging repulsive force.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the shutter setting mechanism according to the present invention in a resting state, FIG. 2 is a plan view showing the shutter setting mechanism in a set state, and FIG. 3 is a plan view showing the blade of the shutter setting mechanism in the middle of opening. FIG. 1... Main plate, 2... Set plate, 3... Set plate spring, 4... Open lever, 5... Open lever spring, 6... Close lever, 7... Close iron piece lever,
8...Close lever spring, 9...Release iron lever spring, 10...Release iron lever, 11...
Closing iron piece, 12... Closing iron piece spring, 13... Hold lever, 14... Closing iron piece lever spring, 15
...Hold lever spring, 16 ... Closing magnet, 17 ... Release magnet, 18 ... Aperture, 19 ... Vane, SW ₁ ... Timing switch, SW ₂ ... Winding switch.

Claims (1)

[Scope of utility model registration request] In a shutter equipped with an electromagnetic release mechanism, an end face for engaging and locking a part of the opening member, and an end face for engaging and charging a part of the closing member; An engaging part engages with a part of the hold member to rotate it to attract the iron piece of the exposure magnet and charge the repulsive force, and an engaging part engages with a part of the release iron piece lever to rotate it. A shutter setting and release mechanism characterized by having a setting plate having an end surface for rotating to attract an electromagnetic release iron piece and charging a repulsive force.