JP2923818B2 - Camera shutter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter device used for a photographic camera.

[0002]

2. Description of the Related Art As a shutter device of a photographing camera, a mechanical shutter device (hereinafter referred to as a mechanical shutter device) that mechanically determines a shutter time by operation setting.
And an electronic shutter device in which the shutter time is determined by an electrical operation. Further, some recent electronic shutter devices additionally include a mechanical shutter device that causes the shutter operation to be performed immediately when the shutter operation is not performed due to consumption of a power supply battery. However, the shutter device additionally configured as described above can only set the shutter time to about two steps.

There are various types of mechanical shutter devices, and FIG. 12 shows a principle configuration of one example. In this figure, reference numeral 10 denotes a rotating cam body that rotates about a support shaft 11, and has a two-stage configuration in which a cam body 12 that operates a shutter and a cam body 13 that determines a shutter time are integrated. This rotary cam body 10 has a shutter
The locking portion 10a is rotated by the trigger lever 15 in a state where it rotates counterclockwise by the jig operation and the spring force of the charge spring 14 is stored, and the state shown in the drawing is maintained.

[0004] One end of a concave portion 12a formed around the cam body 12 is a cam portion 12b for driving a shutter curtain. That is, within the turning range of the cam portion 12b,
A starter lever 16 of the shutter first curtain and a starter lever 17 of the shutter rear curtain advance. The front and rear curtains of the shutter are locked at the positions where they are wound up by the shutter charging operation.
7 is interlockingly driven by the cam portion 12b and is turned around the support shafts 18 and 19, thereby unlocking the lock and running the curtain.

[0005] One end of a concave portion 13a formed around the cam body 13 serves as a timing cam portion 13b for determining a shutter time. That is, the cam portion 13b
The projecting portion 20a of the mechanical adjustment lever 20 advances into the turning area. As a result, the cam portion 13b is
a to rotate the rotating cam body 10
The start time of the rear curtain of the shutter is determined by the degree of this braking.

The mechanical adjustment lever 20 is supported by a support shaft 21 and receives a clockwise turning force by a spring.
The projecting portion 20a always advances into the turning area of the cam portion 13b. The mechanical adjustment lever 20 is connected to a U-shaped time setting lever 22 for determining the extension distance (extension amount) of the projection 20a. The time setting lever 22 is supported by a support shaft 23 and is constantly receiving a counterclockwise turning force by a spring. The protruding pin 20b of the mechanical adjustment lever 20 protrudes into the long hole 22a of one arm, and the protruding pin 22b of the other arm.
Is in contact with the shutter time setting cam 24.

When the shutter time setting cam 24 is operated, the shutter time setting cam 24 is rotated about the support shaft 25 as a support shaft, and the time setting lever 22 is rotated left and right according to the cam shape. That is, as shown in FIG. 13, the amount of turning of the time setting lever 22 according to the rotation of the shutter time setting cam 24 is transmitted to the mechanical adjustment lever 20, and the amount of advance of the projection 20a is determined.

In the mechanical shutter device described above, the trigger lever 15 is pushed clockwise in conjunction with the mirror-raising lever driven by pressing the shutter button to release the lock. The rotating cam body 10 is rotated clockwise by the release of the locking, and the starter lever 16 is rotated by the cam portion 12b.
To move the front curtain of the shutter.

The rotation of the rotary cam body 10 causes the cam portion 13b to move as shown in FIG.
To the projection 20a. Therefore, the rotating cam body 1
The rotation of 0 causes the cam portion 13b to push the protruding portion 20a, so that the rotary cam body 10 continues to rotate while receiving a braking force corresponding to the amount of advance of the protruding portion 20a.

[0010] After extrusion more protrusion portion 20a to the cam portion 13b, rotating the cam member 10 further rotates, the cam portion 12b
, The start lever 17 is pushed to move the rear curtain of the shutter.

As described above, this mechanical shutter device is adapted to the amount of advance of the protrusion 20a provided on the mechanical timing lever 20, that is, the amount of advance of the protrusion 20a determined by the operation setting of the shutter time setting cam 24. Thus, the time from the traveling of the shutter first curtain to the traveling of the shutter rear curtain is determined. Note that, as shown in FIG.
When the shutter time setting cam 24 is operated and set so that the 0-shaped protruding portion 20a is retracted from the turning area of the cam portion 13b, the rotating cam body 10 does not receive any braking force, so that the fastest shutter time is obtained. . Further, the mechanical adjustment lever 20 is switched to a delay cover in conjunction with the shutter time setting cam 24 so that the time can be set over a wide range up to a slow shutter time.

[0012]

The above-described mechanical shutter device has a normal shutter time stage (for example, B, 1, 2).
2, 4, 8, ... 1/1000, 1/2000, 1
/ 4000 shutter seconds), an electronic shutter mechanism that controls the shutter time steplessly is added to this mechanical shutter device with a simple configuration in the present invention, and the mechanical shutter function and the electronic shutter function are performed. It is an object of the present invention to develop a camera shutter device that can select an image according to a shooting situation and shoot an image.

[0013]

In order to achieve the above object, according to the present invention, as a first invention, a trigger lever, which operates in response to a shutter release, is unlocked and rotated by a spring force. Open the shutter at the rotation angle,
A rotating cam body that closes a shutter at a second rotation angle;
A mechanical timing lever which advances into the cam turning area of the rotary cam body by a spring force, is pushed by the cam after the shutter is opened, and retreats from the cam turning area, and holds the mechanical adjusting lever at the retreat position; A mechanical shutter time setting mechanism for determining the amount of advance from the retreat position, wherein the shutter time is controlled in accordance with the rotation time of the rotary cam body that changes according to the amount of advance of the mechanical timing lever. In the camera shutter device, an electronic trigger mechanism for stopping the start of the rotary cam body for a predetermined short time after unlocking of the trigger lever according to the shutter release,
It is controlled by an electronic shutter control circuit to
Electronic timing register to advance and exit the turning area
Has a bar, the electronic timing lever is advanced to the cam pivot region of the rotating cam body delays the rotation of the rotary cam after the shutter opening, the cam pivot outside the electronic timing lever at the end of the shutter time the electrons in response an electronic timing mechanism to advance the rotation of the rotating cam body so as to close the shutter by exit, the mechanical timing lever as described above for the operation of the shutter time setting mechanism exiting holding the cam pivot outside the Shutter control times
Camera shutter device comprising: an operation mode switching mechanism that switches a path to an operation mode of an electronic shutter and shifts the electronic trigger mechanism and the electronic timing mechanism to an operable state. Suggest.

According to a second aspect of the present invention, the trigger lever, which operates in response to the shutter release, is rotated by a spring force by releasing the locking, and the shutter is opened at the first rotation angle and the shutter is closed at the second rotation angle. A rotating cam body formed, a mechanical timing lever which advances into a cam turning area of the rotary cam body by a spring force, is pushed by a cam after the shutter is opened, and leaves the cam turning area, and a mechanical timing lever is withdrawn. Hold in position,
A mechanical shutter time setting mechanism for determining the amount of advance from the retreat position, wherein the shutter time is controlled in accordance with the rotation time of the rotary cam body that changes according to the amount of advance of the mechanical timing lever. A camera shutter device having a mechanical shutter, comprising an electronic trigger mechanism for stopping the start of the rotary cam body for a predetermined short time after the release of the lock of the trigger lever according to a shutter release;
In addition, the upper noted rotation cam and the rotating body in which the gear engaged to gear provided so as to rotate integrally with the shutter closed, which is spring-connected is provided coaxially responding lever to interlock with the rotary member after the shutter opening Operating lever and the shutter is closed in the mechanical shutter operation mode.
In the electronic shutter operation mode in which the shutter is closed by operating the forming lever integrally and the mechanical timing lever is retracted out of the cam rotation range, only the shutter closing lever is operated by the electromagnetic mechanism during the time related to the shutter time. The present invention proposes a camera shutter device characterized in that the shutter is held by suction and then the shutter is closed by the operation of a shutter closing lever.

[0015]

According to the first aspect of the present invention, there is provided a shutter device having a mechanical timing lever.
By operating the shutter time setting mechanism so that the electronic shutter moves out of the cam rotation range of the rotary cam body, the electronic shutter operates. In the operation mode of the electronic shutter,
The electronic trigger mechanism and the electronic timing mechanism transition to an operable state.

In this operation mode, the shutter release
Then, the locking of the trigger lever is released.
At this time, the rotation of the rotary cam body is controlled by the electronic trigger lever.
Has been stopped by After a short time elapses after the lock release of the trigger lever, the electronic trigger mechanism operates, and the rotary cam body starts rotating. Then, the shutter is opened when the rotary cam body rotates to the first rotation angle.

The rotating cam body continues to rotate, the cam hits the electronic timing lever, and the rotation of the rotating cam body stops. The electronic shutter control circuit counts the shutter time, and when the shutter time expires, the electronic timing mechanism operates to release the rotation stop of the rotary cam body by the electronic timing lever. Thus, the rotating cam body starts rotating again, and when the rotation reaches the second rotation angle, the shutter is closed.

Note that the shutter device described above allows the mechanical adjustment lever to advance into the cam turning area of the rotary cam body.
When the shutter time setting mechanism is operated, the operation mode is automatically switched from the operation mode of the electronic shutter to the operation mode of the mechanical shutter, and the shutter can be controlled as in the conventional example.

The shutter device of the second invention is, like the shutter device of the first invention, in the operation mode of the electronic shutter by the operation of the shutter time setting mechanism, and is engaged with the trigger lever by the shutter release. Following release of the stop, the electronic trigger mechanism operates, and the shutter is opened by the rotation of the rotating cam body.

In this shutter device, the rotating body rotates with the rotation of the rotating cam body, and the responsive lever operates by the rotating body after the shutter is opened. At this time, since the shutter closing lever is attracted and held by the electromagnetic mechanism, the spring force of the spring provided between the lever and the responsive lever increases.

The electronic shutter control circuit counts the shutter time, and when the shutter time expires, the suction holding of the shutter closing lever by the electromagnetic mechanism is released, and the shutter closing lever is operated by the spring force to operate the shutter. Is closed.

In the operation mode of the mechanical shutter, the shutter control is the same as that of the conventional mechanical shutter. However, since the electromagnetic mechanism is not operated, the shutter closing lever operates integrally with the responsive lever. To close the shutter.

[0023]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a principle configuration diagram for explaining the first embodiment, and this configuration diagram shows a state of an operation mode of an electronic shutter. The same members and parts as in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the figure, the cam body 13 of the rotary cam body 10 has a concave portion 13c formed symmetrically with the concave portion 13a.
And one end of the concave portion 13c is a cam portion 13d. Further, the protruding portion 30a of the electronic timing lever 30 is configured to move forward and backward in the turning area of the cam portion 13d. The electronic timing lever 30 is supported by a support shaft 31 and is always clockwise turned by a weak spring. The electronic timing lever 30 comes in contact with a stopper 32 and is stationary at a position shown in the figure.

In the electronic timing lever 30, the plunger 33 and the turning lever 34 constitute an electronic timing mechanism. The plunger 33 is pulse-feed controlled by an electronic shutter control circuit (not shown), and is not powered until the shutter time counted by this control circuit ends.

In this case, the turning lever 34 pivotally supported by the support shaft 35 turns clockwise under the pressure expanding force of the plunger spring 36, and locks the electronic timing lever 30 at one end thereof to turn it counterclockwise. Prevents turning in the direction. The turning lever-3
4 collides with the stopper 37 to stop the clockwise turning. When the pulse power is supplied to the plunger 33 at the end of the shutter time, the turning lever 34 is turned counterclockwise against the urging force of the plunger spring 36, and the electronic timing lever is turned.
Release the lock of 30. (See the two-dot chain line in FIG. 2)

The rotary cam body 10 is formed with another locking portion 10b similar to the locking portion 10a, and the electronic trigger lever 38 can be locked to the locking portion 10b. The electronic trigger lever 38 is supported by a support shaft 39 and constitutes an electronic trigger mechanism together with the plunger 40.
When the plunger 40 is not powered, the electronic trigger lever 38 rotates counterclockwise until the plunger spring 41 hits the stopper 42 under the pressure-expanding force of the plunger spring 41. Lock.

The plunger 40 is controlled by the electronic shutter control circuit for pulse power supply. When a short time has passed since the trigger release, the plunger 40 is operated by pulse power supply. In other words, the trigger release causes the trigger lever 15 to unlock the locking portion 10a of the rotary cam body 10, and
The power is supplied to the plunger 40 at a short time after a trigger signal by the ON of the trigger switch 43 is input to the electronic shutter control circuit.

When the power is supplied to the plunger 40, the electronic trigger lever 38 is rotated clockwise against the urging force of the plunger spring 41, so that the locking of the locking portion 10b is released and the rotating cam is released. The rotation of the body 10 starts. (See Fig. 2)

That is, in the operation mode of the electronic shutter, the rotation cam body 10 is started by releasing the locking of the electronic trigger lever 38, and the shutter first curtain and the rear curtain are controlled. In this manner, by slightly delaying the start of the rotary cam body 10 and using it as a reference for the shutter start, an accurate shutter speed can be obtained by time control determined by the calculation time of the shutter time by the electronic shutter control circuit.

On the other hand, the shutter time setting cam 24 has
The mode changeover switch 44 is provided so as to interlock. The mode changeover switch 44 is operated by operating the shutter time setting cam 24 so that the protrusion 20a of the mechanical adjustment lever 20 is moved out of the turning range of the cam 13b.
N, and the ON signal is input to the electronic shutter control circuit as an operation mode signal of the electric shutter.

The electronic shutter control circuit receives the above-mentioned operation mode signal, shifts to an operation preparation state, and inputs a shutter release signal (for example, an ON signal of a switch interlocked with a pressing operation of a shutter button) to set a shutter time. Calculate.
At the same time it starts counting the shutter time and the pulse power supply of the plunger 40 after receiving the ON signal of the trigger switch 43 with the unlocking of the trigger lever 15 corresponding to the shutter motor release.

The shutter time setting cam 24 is provided with a mode switching cam 45 which rotates coaxially and integrally. The mode switching cam 45 mechanically modulates an electronic trigger mechanism and an electronic timing mechanism. The mode is switched. That is, one end of the first lever 47 supported by the support shaft 46 is brought into contact with the mode switching cam 45 by a spring force,
The other end of the first lever 47 and one end of the second lever 48 are connected by a connecting lever 49, and the second lever 48 is supported by a support shaft 50 and the other end. Is connected to the drive lever 51.

The drive lever 51 is provided with a long hole 51a, and a fixing pin 52 is inserted into the long hole 51a.
1 is moved in the horizontal direction in the drawing in conjunction with the second lever 48. The drive lever 51 is
The tongue 51b pushes the projecting pin 34a of the revolving lever 34, and the tongue 51c pushes the projecting pin 38a of the electronic trigger lever 38. And the electronic timing mechanism are switched to the operation mode of the mechanical shutter. (See Fig. 4)

Next, the operation of the above-described shutter device will be described with reference to the operation process diagram of FIG. 2 and the time chart of FIG. Note that, as shown in FIG. 1, it is assumed that the electronic shutter is in the operation mode and the shutter charge has been completed.

When the shutter release is performed by pressing the shutter button of the camera, the electronic shutter control circuit determines the ON state of the mode changeover switch 44 at the stage when the shutter button is half-pressed, and enters the operation mode of the electronic shutter. Move on. By fully depressing the shutter button, the trigger lever 15 turns to release the locking of the rotary cam body 10 in conjunction with the jump of the mirror, and the trigger switch 43 is turned on. (FIG. 3
See T ₁ and T ₂

The electronic shutter control circuit inputs the ON signal of the trigger switch 43, and supplies a pulse to the plunger 40 of the electronic trigger mechanism with a short delay (ΔT in FIG. 3) from the time of the input. By pulse feed of (T ₃ see Figure 3) the plunger 40 is controlled,
The electronic trigger lever 38 pivots clockwise to release the locking of the rotary cam body 10.

With this operation, the rotary cam body 10 starts rotating clockwise. When the rotary cam 10 is rotated to a first rotation angle point (T ₄ time in FIG. 3), Star - Toreba -1
6 is pushed and rotated by the cam portion 12b, and the shutter first curtain runs, and the shutter is opened.

When the rotation of the rotating cam body 10 further proceeds, as shown in FIG.
, And the rotation of the rotary cam body 10 stops. (See T ₅ point in FIG. 3) The operating state at the electronic shutter control circuit of the shutter time by counting proceeds, pulse power supply control plunger 33 at the end of the shutter time (see time point T ₆ in FIG. 3)

The turning lever 34 turns counterclockwise as indicated by the two-dot chain line in FIG. 2 by the pulse power supply of the plunger 33 to release the locking of the electronic timing lever 30. For this reason, the rotation cam body 10 starts rotating while pushing the electronic timing lever 30 as shown by a two-dot chain line in FIG. When the rotation of the rotating cam 10 advances to the second rotation angle point (T ₇ point of FIG. 3),
The starter lever 17 is pushed and rotated by the cam portion 12b to move the rear curtain of the shutter, and the shutter is closed. In addition,
In FIG. 3, Tx indicates a time taking into account the calculation of the shutter time, and Ts indicates the actual shutter time.

FIG. 4 is a principle diagram showing a state in which the above-mentioned shutter device is switched to a mechanical shutter operation mode.
As shown, when the shutter time setting cam 24 is operated so that the protrusion 20a of the mechanical adjustment lever 20 advances into the turning range of the cam portion 13b, a mode changeover switch 44 is provided.
Becomes OFF. With this OFF signal, the electronic shutter control circuit enters the operation mode of the mechanical shutter, and controls the plungers 33 and 40 without power supply.

In accordance with the rotation of the mode switching cam 45, the first lever 47 pivots clockwise, and the second lever 48 interlocked with the first lever 47 pivots clockwise.
The drive lever 51 moves leftward (FIG. 1) while pushing the projecting pins 34a and 38a. Therefore, as shown in FIG. 4, the turning lever 34 turns counterclockwise to release the lock of the electronic timing lever 30, and the electronic trigger lever 38 turns clockwise to rotate. The lock of the rotating cam body 10 is released, and the electronic trigger mechanism and the electronic timing mechanism are in the operation mode of the mechanical shutter.

In the operation mode of the mechanical shutter, similarly to the conventional mechanical shutter, the rotation cam body 10 starts rotating by releasing the locking of the trigger lever 15, and the cam portion 13b is formed as a projection of the mechanical adjustment lever 20. The rotary cam body 10 is braked by pushing the portion 20a, and the shutter time is determined. In this mechanical shutter operation, the rotating cam body 10 rotates so that the projection 30a of the electronic timing lever 30 is pushed out by the cam portion 13d, and the electronic timing lever 30 receives almost no braking. FIG. 5 shows a time chart of the mechanical shutter operation.

FIG. 6 is a principle configuration diagram for explaining the second embodiment, and shows the operation mode of the electronic shutter. The same parts and parts as in the conventional example and the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

In this embodiment, a gear 60 rotating integrally with the rotary cam body 10 is fixed to the support shaft 11, and a rotating body 61 having a sector gear meshed with the gear 60 is provided. Is rotated around the support shaft 62, and the rotating body 61 forms a fan-shaped notch, and rotates counterclockwise in a range where the side edges 61a and 61b of the notch abut the stopper 63. Further, it is configured to rotate clockwise.

The rotating body 61 rotates left and pushes the driven lever 64 by its side edge 61a. (See FIG. 7) The responsive lever 64 is double-layered with the shutter closing lever 65, and these two levers 64, 65 are rotatably supported by a support shaft 66. A single spring 67 is provided between these two levers 64 and 65 for applying a turning force in opposite directions.

That is, the response lever 64 receives a counterclockwise turning force by the spring 67, and the shutter closing lever
The stopper 65 is in contact with the stopper pin 68 and is stationary. Further, the shutter closing lever 65 receives a clockwise turning force by a spring 67, and an armature 69 provided on a part thereof comes into contact with the electromagnet 70 to be stationary.

The spring 7 provided on the shutter closing lever 65
Reference numeral 1 denotes a spring having a spring force weaker than that of the above-described spring 67. The responsive lever 64 and the shutter closing lever 65 are integrally turned counterclockwise, and the shutter closing lever 65 is rotated. The locking portion 65a works to lock the rear curtain running lever 72. In addition, reference numeral 7 in FIG.
Reference numeral 3 denotes a front curtain running lever which rotates counterclockwise when the start lever 16 is unlocked and runs the shutter front curtain.

Next, the operation of the above-described shutter device will be described with reference to the operation process diagram of FIG. 7 and the time chart of FIG. As shown in FIG. 6, it is assumed that the electronic shutter is in the operation mode and the shutter charge has been completed.

When the shutter button is pressed to shift to the shutter release, power is supplied to the plunger 40 and the electromagnet 70 by the electronic shutter control circuit, and the trigger lever 15 turns to rotate the rotary cam in conjunction with the jumping of the mirror. The body 10 is unlocked. (Refer to the time points T ₁ and T _{2 in} FIG. 8)

Thus, the ON signal of the trigger switch 43 is input to the electronic shutter control circuit. Further, the power supply of the plunger 40 causes the electronic trigger lever 38 to turn counterclockwise to lock the locking portion 10b of the rotary cam body 10. Further, the armature 69 of the shutter closing lever 65 is attracted and held by the electromagnet 70.

The electronic shutter control circuit receives the ON signal of the trigger switch 43 and stops the power supply to the plunger 40 after a short time (ΔT). (See T ₃ time points Fig. 8) From this, the electronic trigger - to release the locking of the rotary cam member 10 to pivot in a clockwise direction lever -38 is subjected to拡圧force of the plunger spring 41. When the rotating cam body 10 starts rotating by releasing the lock, and rotates to the first rotation angle, the starter lever 16 is pushed around by the cam portion 12b to lock the front curtain running lever 73. The shutter is released and the shutter first curtain is driven. (See T ₄ time of FIG. 8)

On the other hand, when the rotating body 61 rotates counterclockwise in accordance with the rotation of the rotating cam body 10, and the rotating cam body 10 further rotates after opening the shutter, and rotates to the second rotation angle, The side edge 61 a of the rotating body 61 hits the stopper 63. At this time, the responsive lever 64 is connected to the rotating body 6.
1 is pushed by the side edge 61a, the responsive lever 64 pivots clockwise, but the shutter closing lever is rotated.
Numeral 65 holds the position shown in FIG. 6 because the armature 69 is attracted by the electromagnet 70.

In other words, the operating state shown in FIG. 7 is achieved in which only the responsive lever 64 turns, and the spring force of the spring 67 is increased. In this operating state, the electronic shutter control circuit stops power supply to the electromagnet 70 based on the end of the shutter time. Thereby, the adsorption of the armature 69 is released,
The shutter closing lever 65 receives the spring force of the spring 67 and turns as shown by a two-dot chain line in FIG. As a result, the locking of the locking portion 65a is released, the rear curtain running lever 72 pivots as shown by a two-dot chain line in FIG.
The shutter closes. (See T ₅ point in FIG. 8)

FIG. 9 is a principle configuration diagram showing a state in which the shutter device is switched to an operation mode of a mechanical shutter. As shown in the drawing, the mode changeover switch 44 is turned off by operating the shutter time setting cam 24 so that the protruding portion 20a of the mechanical adjustment lever 20 advances into the turning area of the cam portion 13b. Upon judging the OFF signal, the electronic shutter control circuit enters the operation mode of the mechanical shutter.

When the electronic shutter control circuit shifts to the mechanical shutter operation mode, the plunger 40 and the electromagnet 70 are moved.
Becomes unpowered. Therefore, the electronic trigger lever 38
Is in a state where the locking of the rotating cam body 10 is released, and
The shutter closing lever 65 is in a position where it is turned counterclockwise by the spring force of the spring 71.

Therefore, when the trigger lever 15 is unlocked by the shutter release, the rotary cam body 10 starts rotating immediately and pushes the starter lever 16 at the first rotation angle to open the shutter. Let it. When the rotation of the rotary cam body 10 further advances, as shown in FIG. 10, the cam portion 13b acts to push out the protruding portion 20a of the mechanical timing lever 20, and the rotary cam body 10 is braked similarly to the conventional example. Is done.

When the rotary cam body 10 rotates at the second rotation angle, the side edge 61a of the rotary body 61 abuts against the stopper 63 as shown by a two-dot chain line in FIG. At this time, the response lever 64 and the shutter closing lever 65 are
The car turns integrally as shown by the two-dot chain line of 0, and the rear curtain drive lever 7
Release the lock of 2, and close the shutter. FIG. 11 is a time chart showing the operation of the mechanical shutter.

In the above-described embodiment, when the mechanical shutter device is set to the maximum shutter time, the mode changeover switch 44 is turned on to operate the electronic shutter, but the time setting lever 22 is not operated. By providing an operation member for turning clockwise, the electronic shutter can be switched to the operation mode of the electronic shutter while the mechanical shutter device is set to an arbitrary shutter time. In such a case, the mode changeover switch 44 is turned on in response to the time setting lever 22 or its operating member. Further, the operation time of the plunger 40 is appropriately determined.
If T is lengthened, it can be used as a self-timer.

[0060]

As described above, according to the present invention, there is provided a shutter device having a mechanical shutter function capable of setting the shutter time in multiple steps and an electronic shutter function for controlling the shutter time steplessly. Therefore, it is possible to provide a camera capable of selecting a mechanical shutter or an electronic shutter in accordance with a shooting situation, and to set a shutter time in multiple steps even when the electronic shutter becomes inoperable due to power supply battery exhaustion or the like. A camera shutter device that is practically convenient, such as being able to take pictures at an arbitrary shutter time using a mechanical shutter. Further, in the present invention,
In the operation mode of the mechanical shutter, the rotating cam
In addition to the trigger lever for triggering, an electronic trigger function for delaying the start of the rotary cam body by a predetermined time in the operation mode of the electronic shutter is provided. The shutter can be configured with sufficient consideration of the operating characteristics of the drive mechanism and the like, so that the degree of freedom in design is increased and a highly accurate shutter device is obtained. According to the first aspect of the invention, the characteristics of the trigger plunger and the time control plunger, which are responsible for the start, are made uniform, and both the operation methods of the plunger are unified to the pulse suction operation, and the release of the hook engagement is released by the pulse current. As a result, stable operation and power saving can be achieved. Further, in order to use the mechanical shutter, the mechanical shutter and the electronic shutter are switched by a single operation because the mechanical shutter is forcibly linked to the time setting cam so as to be forcibly retracted out of the track so as not to affect the rotation cam operation. be able to. According to the second aspect of the present invention, the rotation cam body is stopped halfway when the shutter is closed to control the electronic shutter time, so that a control error such as a bounce does not occur.

[Brief description of the drawings]

FIG. 1 is a principle configuration diagram of a shutter device according to a first embodiment of the present invention, showing an operation mode of an electronic shutter.

FIG. 2 is a partially omitted enlarged view showing an operation process in an electronic shutter operation mode of the shutter device according to the first embodiment.

FIG. 3 is a time chart for explaining an operation in an electronic shutter operation mode of the shutter device according to the first embodiment;
It is.

FIG. 4 is a principle configuration diagram showing a mechanical shutter operation mode of the shutter device according to the first embodiment.

FIG. 5 is a time chart for explaining the operation of the mechanical shutter operation mode of the shutter device according to the first embodiment.

FIG. 6 is a view showing the principle configuration of a shutter device according to a second embodiment, showing an operation mode of an electronic shutter.

FIG. 7 is a partially omitted enlarged view showing an operation process in an electronic shutter operation mode of the shutter device according to the second embodiment.

FIG. 8 is a time chart for explaining the operation of the shutter device according to the second embodiment in the electronic shutter operation mode.
It is.

FIG. 9 is a principle configuration diagram showing a mechanical shutter operation mode of the shutter device according to the second embodiment.

FIG. 10 is a partially omitted enlarged view showing an operation process in a mechanical shutter operation mode of the shutter device according to the second embodiment.

FIG. 11 is a time chart for explaining the operation of a mechanical shutter operation mode of the shutter device according to the second embodiment.

FIG. 12 is a simplified configuration diagram of a mechanical shutter device shown as a conventional example.

13 is an operation process diagram of the mechanical shutter device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rotating cam body 10a, 10b Locking part 12 Cam body 12b Cam part 13 Cam body 13b, 13d Cam part 15 Trigger lever 16 Starter lever of shutter first curtain 17 Starter lever of shutter rear curtain 20 Mechanical adjustment Hour lever 20a Protrusion 22 Time setting lever 24 Shutter time setting cam 30 Electronic timing lever 33 Plunger 34 Turning lever 38 Electronic trigger lever 40 Plunger 43 Trigger switch 44 Mode switch 45 Mode Drive switching cam 51 Drive lever 60 Gear 61 Rotating body 64 Responsive lever 65 Shutter closing lever 69 Armature 70 Electromagnet

Claims (2)

(57) [Claims] 1. A rotary cam that rotates by a spring force by unlocking a trigger lever that operates according to a shutter release, and opens a shutter at a first rotation angle and closes a shutter at a second rotation angle. Body, a mechanical timing lever which advances by a spring force into a cam rotation area of the rotary cam body, is pushed by the cam after the shutter is opened, and leaves the cam rotation area, and holds the mechanical adjustment lever at the retracted position. A mechanical shutter time setting mechanism for determining the amount of advance from the retreat position, wherein the shutter time is controlled in accordance with the rotation time of the rotary cam body that changes according to the amount of advance of the mechanical timing lever. An electronic trigger for stopping the start of the rotary cam body for a predetermined short time after the release of the locking of the trigger lever in accordance with a shutter release in a camera shutter device having a mechanical shutter configuration. -Mechanism and electronic shutter control circuit
Therefore, control is performed to advance the rotating cam
And an electronic timing lever for causing the electronic
Delays the rotation of the rotary cam after the shutter open the timing lever is advanced to the cam pivot region of the rotating cam body, closing the shutter of the electronic timing lever to leave the cam pivot outside at the end of the shutter time The electronic shutter control circuit is driven by the electronic shutter control circuit in accordance with the operation of the electronic timing mechanism for advancing the rotation of the rotary cam body so as to achieve the operation and the shutter time setting mechanism for retracting and holding the mechanical timing lever out of the cam rotation range . Movement
A shutter device for a camera, comprising: an electronic shutter means comprising an operation mode switching mechanism for switching to an operation mode and shifting the electronic trigger mechanism and the electronic timing mechanism to an operable state. 2. A rotating cam which rotates by a spring force by unlocking a trigger lever which operates according to a shutter release, and opens a shutter at a first rotation angle and closes a shutter at a second rotation angle. Body, a mechanical adjustment lever that advances into the cam rotation area of the rotary cam body with a spring force, is pushed by the cam after the shutter is opened, and retreats from the cam rotation area, and holds the mechanical adjustment lever at the retracted position. A mechanical shutter time setting mechanism for determining the amount of advance from the retreat position, wherein the shutter time is controlled in accordance with the rotation time of the rotary cam body that changes according to the amount of advance of the mechanical timing lever. An electronic trigger for stopping the start of the rotary cam body for a predetermined short time after the release of the locking of the trigger lever in accordance with a shutter release. A chromatography mechanism, in addition, a rotating body which is gear coupled to a gear which is provided so as to rotate integrally with the rotary cam member noted above, is provided coaxially responding lever to interlock with the rotary member after the shutter opening A shutter closing lever connected with a spring is provided. In the mechanical shutter operation mode, the responsive lever and the shutter closing lever operate integrally to close the shutter, and the mechanical adjusting lever is moved out of the cam rotation area. In the electronic shutter operation mode for holding, only a shutter closing lever is attracted and held by an electromagnetic mechanism during a period related to a shutter time, and then the shutter is closed by an operation of the shutter closing lever. Shutter device.