JPS62157475A - Electronic camera - Google Patents

Abstract

PURPOSE:To execute the movie photographing by operating so that a reflection mirror can recede to the outside of a finder optical path at the time of the movie photographing to a means to interlock to the releasing and operate a reflection mirror at the time of still recording. CONSTITUTION:A locking pin 67 (constituted integrally in one body with a plate spring 68), in which protrusion is regulated by a movie changing-over operating member 60 in the condition as shown in a figure (still photographing condition), is protruded by the force of a plate spring 68 and engaged with an edge part 60a when the movie changing-over operating member 60 slides in the left direction and comes to the position where the edge part 60a rides over a locking pin 67. As the result, the return by a spring 65 of the movie changing-over operating member 60 and a sliding plate 61 is regulated, and thus, the member 60 and the sliding plate 61 are locked. In such a condition, a projected part 61b of the sliding plate 61 pushes a movie changing-over switch 69 and turns it on. By turning on the switch 69, the electric circuit in a main camera is changed over from a still recording to a movie photographing condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic camera having a solid-state image sensor.

In particular, the present invention is an electronic camera that records still images using a video floppy disk, for example,
Furthermore, the present invention relates to an electronic camera that is capable of shooting movies (videos).

[Prior Art] For example, a so-called electronic camera is known in which subject light is accumulated as an electric charge in a solid-state image pickup device such as a COD, and this is magnetically recorded on a magnetic sheet.

[Problems to be Solved by the Invention] Therefore, an object of the present invention is to provide a camera capable of not only still recording but also movie recording.

[Means for Solving the Problems] The camera according to the present invention has a reflecting mirror acting on the finder optical path meter 1 means in conjunction with the release during still recording, and a second means for holding the shutter device in an open state. Equipped with.

[Function] In the present invention, the means for operating the reflecting mirror in conjunction with the release during still recording is made to act so that the reflecting mirror is retracted out of the viewfinder optical path during movie shooting, and the shutter device is activated during movie shooting. Hold open.

[Example] Hereinafter, the present invention will be described in detail based on Examples.

FIG. 1 is an exploded configuration diagram showing the mechanical components of an electronic camera to which the present invention is applied. In this figure, l is a step motor, 2 is an aperture signal sector gear, 3 is an aperture signal lever, 4 is a spring (tension spring), 5 is a bell crank, 6 is an aperture drive ring, 7 is an aperture blade, 8 is a cam ring, 9 is a spring (tension spring).

10 is an automatic throttle lever, 11 is a spring (tension spring), 12 is an I]C (direct current) motor, IC is a bevel gear, 14 is a quick return clutch cam, and 15 is a wind stop cam.

1B is a charge cam, 17 is release lever 1 18 is the release slide plate, 13 is a spring (tension spring), 20 and 21 are axes; 22 is a first tightening member; 23 is a spring (tension spring), 24 is a storage lever, 25 is the clutch, 2B is a spring (tension spring), 27 is a quick return lever, 28 is a mirror holding lever; 28 is a mirror.

30 is the contact lever, 31 is a clutch interlocking lever; 32 is a spring (tension spring).

33 is the intermediate lever, 34 is a winding stop lever; 35 is a spring (tension spring), 3B is the winding stop switch, 37 is a mirror retraction spring.

38 is a mirror return spring; 39 is a crystal filter, 40 is the shutter rear blade.

41 is a spring (tension spring).

42 is a shutter tip blade, 43 is a spring (tension spring), 44 and 45 are shutter drive coils, 4B and 4
7 is a permanent magnet that faces the coils 44 and 45 to generate electromagnetic force; 48 is a shutter tightening member; 49 is a spring (tension spring); and 50 is a bottle.

51 is an image sensor such as a CCO; 53 is the aperture, 54 is an intermediate lever; 55 is a locking lever.

5B is a spring, 57 is a spring, 60 is a movie switching operation member; B1 is a slide board, 82 J4 is a guide bin, 83 is a slide plate for opening the shutter.

85.88 is a spring, 67 is a locking bottle; 89 is the movie selection switch It is.

FIG. 1 shown here is a perspective view showing the state immediately before the release button (not shown) is pressed.

First, press the first step of the release button (not shown).
The photometry circuit (not shown) moves once according to the stroke), and the step motor l rotates in accordance with its output. As a result, the aperture signal sector gear 2 is rotated, and the aperture signal lever 3 is rotated against the spring 4. Thus, cam surface 3
The position a (corresponding to the aperture amount) is set.

This step motor 1 always follows the output of the photometry circuit and controls the position of the cam surface 3a so as to obtain an appropriate aperture value while the first step of the release button is being pressed.

When the release button is pushed further and reaches the second press position, the start switch of this camera (described in detail later; see Figure 3) is closed, and the DC motor 12 rotates counterclockwise (reversely). As a result, the charge cam 16 is rotated clockwise and the release lever 17 is pushed down. Then, the release slide plate 18 guided by the shafts 20 and 21 begins to descend.

The cam surface 18a of the release slide plate 18 rotates the first tightening member 22 to the right against the force of the spring 23, and releases the locking of the energy storage lever 24. Therefore, the energy storage lever 24 is pulled by the spring 37 and rotates to the right, causing the quick return lever 27 to rotate to the right via the clutch 25.

Pin 2 attached to quick return lever 27? b is engaged with the engaging portion 28a of the mirror holding lever 28, so as the quick return lever 27 rotates to the right, the mirror holding lever 28 rotates to the right, thereby retracting the mirror 28 out of the optical path. At this time, one end 24a of the energy storage lever 24 contacts the winding stop lever 34, so the lever 34 is rotated to the left and retracted from the winding stop cam 15.

Further, the tip 27c of the quick return lever 27 pushes down the automatic aperture lever 10 against the spring it, so that the aperture drive ring 6, which had been prevented from rotating by the action of the spring 11, is rotated clockwise by the force of the spring 9. direction (clockwise rotation), and the bell crank 5 is rotated to the left. At this time, since the cam surface 3a of the aperture signal lever 3 is set at a position corresponding to the output of the photometric circuit as described above, the bell crank 5 rotates to the position where the bin 5a is restrained by the cam surface 3a. do. In other words, the amount of rotation of the aperture drive ring 6 is controlled by the pin 5b.

As the aperture drive ring 6 rotates to the right, the pin 7b of the aperture blade 7
slides along the cam surface 8a of the cam ring 8, and the aperture is narrowed down to a predetermined aperture value. Although only one aperture blade is shown in this figure for convenience, it goes without saying that the aperture #l structure is composed of a plurality of aperture blades.

Further, by turning the energy storage lever 24 to the right, the other end 24b of the lever rotates the intermediate lever 54 counterclockwise against the spring 5θ, and the locking lever 55 is rotated by the spring 5θ.
7, the shutter tightening member 4 is rotated clockwise, and its locking portion 55b waits at a position where it can lock the shutter tightening member 4 as described later.

In this way, in response to pressing the release button, the reflecting mirror 29 is retracted out of the optical path, and the aperture is narrowed down to an appropriate value.

After that, the energized coil 44 and the permanent magnets 4B, 4? The rear shutter blade 40 rotates counterclockwise against the spring 41 due to the electromagnetic force acting between the shutter blade 40 and the tip 40a of the rear blade 40 that is locked to the protrusion 48a (lower side) of the shutter tightening member 48. , the aperture 53 is opened. Thereafter, the power supply to the coil 44 is cut off, and preliminary exposure is performed using the image pickup device 51 for a predetermined shutter time.

Thereafter, it is checked whether the exposure amount was appropriate or not, and the set shutter time or aperture amount is corrected in response to the amount that deviates from the appropriate amount.

Next, the drive coil 45 of the leading blade 42 is energized.

The leading blade 42 is rotated to the left against the force of the spring 43. Then, at the same time when the leading blade 42 reaches a position covering the seventh percher 53, the leading end 42a pushes down the cam part 48b of the fourth shutter tightening member, thereby rotating the shutter tightening member 48 to the left against the spring 49. The shutter tightening member 48 rotated to the left and engages with the locking portion 55b of the locking lever 55,
Left rotation position is maintained. In this way, the disengaged state between the distal end 40a of the rear blade 40 and the protrusion 48a is maintained, and the rear blade 40 can travel (rotate).

Further, in a state where both blades 42.40 are maintained in a left-rotated position due to the energization of the coil 45.44, the leading blade 4
By cutting off the power to the drive coil 45 provided in 2,
The leading blade 42 is caused to travel by the tensile force of the spring 43. Then, after the corrected predetermined shutter time has elapsed, the power supply to the drive coil 44 provided in the rear blade 40 is cut off, and the rear blade 40 is caused to travel by the spring 41. In this way, the main exposure using the shutter blade is completed.

The above explanation is the operation sequence from when the release button is pressed until the shutter runs. Thereafter, when the DC motor 12 is rotated clockwise (forward rotation), the quick return clutch cam 14 is rotated counterclockwise, so that the clutch 25 is rotated to the left via the communication lever 30 and the clutch interlocking lever 31. As a result, clutch 2
5 and the quick return lever 27 are released, the quick return lever 27 is moved by the spring 38 (
The mirror 29, which is fixed to the mirror holding lever 28, is rotated to the left by the force of the mirror return spring), and the mirror 29, which is fixed to the mirror holding lever 28, returns to the finder optical path. At this time, the automatic aperture lever 10 also returns to its original position due to the action of the spring 11, returning the aperture drive ring 6 to the open position, and the aperture becomes open.

Also, at this time, @stop lever 34 is pressed by energy storage lever 24 and retreated from winding stop cam 15, so D
C-motor 12 is not prevented from rotating clockwise (forward rotation).

Thus, the counterclockwise rotation (normal rotation) of the charge cam 1B charges the spring 37 (mirror retraction spring) of the energy storage lever 24 via the intermediate lever 33.

Then, the energy storage lever 24 is locked by the first tightening member 22, and the clutch 25 is again engaged with the quick return lever 2.
7 pin 27a.

After that, the winding stop lever 34 is inserted into the recess of the winding stop cam 15.
The tip of the winding is indented, the winding stop switch 38 is turned on, and the rotation of the motor 12 is stopped.

Further, as the energy storage lever 24 is charged to the state before exposure and is locked by the first tightening member 22, the intermediate lever 54 is rotated clockwise by the spring 56←. As a result, the locking lever 55 is moved by the spring 57 with a weak force.
The engaging portion 55b is disengaged from the shear 2 tightening member 4B, and the engaging portion 55b is rotated counterclockwise against the
8 is rotated clockwise by the spring 48, contacts the stopper 50, and returns to the state shown in FIG.

Next, we will explain the parts that operate when shooting a movie.

This electronic camera is equipped with a well-known electronic viewfinder, and from the signal obtained by the image sensor 51, a signal processing circuit (refer to FIG. 3, reference numeral 204), which will be described later, produces a television camera signal that can be recorded on, for example, a VTR device. is formed,
It is assumed that the formed signal is configured to be supplied to a VTR device.

When the movie switching operation member 60, which protrudes from the outside of the camera (body) and can be freely operated, is slid in the direction of arrow A, a slide plate 81 integrated with the movie switching operation member 60 is inserted into the elongated hole 81a at the tip thereof. It is guided by the fitted guide pin 62, is slid to the left against the spring 65, and is locked in the following manner. That is, the locking pin 87 whose protrusion was regulated by the movie switching operation member 60 in the state shown in the first figure (still shooting state)
(constructed integrally with the leaf spring 68), when the movie switching operation member 60 slides to the left and reaches the position where the end [10a] passes over the locking pin 67, the leaf spring 88
The force protrudes and engages with the end portion 80a. the result,
The return of the movie switching operation member 60 and the slide plate 61 by the spring 65 is regulated, and thus the member 8
0 and the slide plate 61 are locked. In this state,
The protrusion 131b of the slide plate 61 pushes the movie changeover switch 69 to turn it on.

By turning on this switch 63, the electric circuits (control circuit 201 and signal processing circuit 201, which will be described later) in the camera are turned on.
) switches from still recording to movie shooting mode.

Furthermore, the end 131c of the slide plate 61 pushes the quick return lever 27 and rotates it clockwise (clockwise rotation), which pushes down the automatic aperture lever 10 and adjusts the lens aperture in the same way as described above. Narrow down, at the same time bin 2 on quick return lever 27? b causes the mirror holding lever 28 to rotate clockwise, and the mirror 23 is retracted out of the photographing optical path.

Further, as shown in FIG. 2, by sliding the slide plate 61 to the left, the cam portion 131d is moved against the spring 8B.
The lower end 83G of the shutter opening slide plate θ3, which is always urged downward, is pushed up. As a result, the shutter opening slide plate 83 is guided by the elongated hole 83a and the pin θ4 fitted therein, and slides upward against the spring 66. As a result, the upper end portion 83b of the shutter opening slide plate 83 is the protrusion 4 of the shutter rear blade 40
0b is pushed up and the rear shutter blade 40 is rotated counterclockwise against the spring 41 to open the aperture 53.

At this time, the rotational position of the rear blade 40 is as shown in FIG.
This is a position just before the protrusion 48a of the shutter tightening member 48 and the tip 40a of the rear blade can engage with each other, and the aperture is maintained in an open state.

Since the electric circuit inside this camera is switched to the movie shooting state by the switch 89, when the release button (not shown) is pressed in the state shown in FIG. 2, the subject light passes through the shooting lens and then through the crystal plate 39. , are accumulated in the image sensor 51 at a cycle of 1/61 seconds, and recorded as a moving image in a VTR connected to this camera. Note that the aperture signal sector gear 2 is rotated by the step motor 1 in accordance with the brightness of the subject, and the aperture signal lever 3 is rotated against the force of the spring 4.

As a result, when shooting movies, the aperture is closed down,
The aperture value is controlled according to the brightness of the subject. Further, at this time, the motor 12 does not operate at all due to the switching of the circuit based on the ON of the switch 89, and the energy storage lever 24 and the like maintain the state shown in FIG.

Further, since the finder is equipped with an electronic finder as described above, the subject image stored in the image sensor (CCN) is always displayed on the electronic finder and can be visually recognized by the user.

Next, the case of changing from the movie shooting state to the still recording state will be described.

When the locking pin B7 is pushed from the locked state of the movie switching operation member BO as shown in FIG.
0 and the slide plate 81 return to the state shown in FIG. 1 by the action of the spring 85. Therefore, quick return lever 2
7 is rotated counterclockwise by the action of the spring 38 and returns to the return position shown in FIG. 1, and the diaphragm returns to its open state. The slide plate 83 is also lowered by the action of the spring 8θ and returns to the state shown in FIG. 1, the rear shutter blade 40 covers the aperture 53 by the action of the spring 41, and the movie changeover switch 69 is returned to the OFF state.

Further, when the quick return lever 27 returns to the state shown in FIG. 1, the mirror 29 also returns to the photographing optical path. This sets the camera to still recording mode.

FIG. 3 is an electrical block diagram for controlling the nut flow side shown in FIG. 1. In this figure, 3fl, 8
Reference numerals 13 and 51 denote the winding stop switch, movie changeover switch, and image sensor shown in FIG. 1, respectively; 201 is a control circuit; 202 is an SSa (synchronizing signal generator); 203 is an image sensor drive circuit; and 204 is a signal processing circuit.

205 is a shutter speed setting circuit; 20B is a shutter control circuit; 207 and 208 are excitation circuits.

209 is a correction circuit; 210 is an aperture value determining circuit; 211 is a photometric element; 212 is a step motor drive circuit; 213 is a DC motor drive circuit.

FIG. 4 is a flowchart showing a control procedure to be executed by the control circuit 201 shown in FIG.

The control procedure in this embodiment will be explained below with reference to FIGS. 3 and 4.

First, when the 41%1 switch 214 is closed by pressing the first step of the release button (step S1 in FIG. 4), the control circuit 201 determines whether the switch 68 is off (step 5IA in FIG. 4); The image sensor driving circuit 203 and the aperture value determining circuit 210 are energized (step S in FIG. 4).
2) As a result, the driving of the image sensor 51 is started in synchronization with the timing signal from the SSC (synchronizing signal generator) 202, while the aperture value determining circuit 210 starts driving the photometric element 211.
Object brightness information B and shutter time setting circuit 205
The appropriate aperture value A is based on the shutter speed information Tma from
and outputs it to the step motor drive circuit 212.

Then, the step motor drive circuit 212 drives the step motor 1 and adjusts the aperture signal lever 3 to a rotation angle position corresponding to the aperture value A.

Next, the control circuit 201 waits for a certain period t1 necessary for the aperture presetting operation (step S3 in FIG. 4).
Then, it is checked whether the second switch 215, which is turned on by pressing the second step of the release button, is closed (step 54A in FIG. 4).
is closed, the control circuit 201 causes the aperture value determination circuit 210 to store the aperture value A at that time (
FIG. 4 step 54B), then DC motor drive circuit 2
13 to rotate the DC motor 12 in the counterclockwise direction (forward rotation: see Fig. 1) (Step S5 in Fig. 4)
As a result, the mirror 29 is retracted and the aperture is narrowed down.

Meanwhile, during this time, the control circuit 201
8 (see Fig. 1) is turned off (step S8 in Fig. 4), and when the retraction of the mirror 29 and the narrowing of the aperture blades 7 are completed, the stop lever 34 is turned to the left (the accumulating lever is turned off). 24), when the winding stop switch 36 is turned off, the DC motor drive circuit 213
The operation output of the DC motor 12 is stopped to stop the rotation of the DC motor 12 (step S7 in FIG. 4).

Next, the control circuit 201 controls the rear blade coil excitation circuit 207.
The rear blade coil 44 is energized for a certain period t2 (step S8 in FIG. 4), and then the energization is stopped (step S8 in FIG. 4). During this energization period t2, the rear blade 40 rotates to the left. This is sufficient time for the image to be captured by the shutter tightening member 48.

Thus, the aperture 53 is opened, the image sensor 51 is exposed (pre-exposure), and the control circuit 201 activates the correction circuit 209 at this point (step 91 in FIG. 4).
0).

In this state, the aperture blades 7 are first connected to the aperture value determining circuit 210.
The aperture value is narrowed down to the aperture value At determined by
Therefore, the correction circuit 208 is a signal processing circuit 204 that receives an image signal from the image sensor 51 exposed in the actual aperture state.
The appropriate shutter speed is determined based on the level of the luminance signal Y from the shutter speed controller 200, and this is output to the shutter speed setting circuit 205 as a correction signal. As a result, the shirt timing setting circuit 205 replaces the initially set shirt timing (manually or the like) with the shirt timing seconds from the correction circuit 208.

After step S1o, the control circuit 201 waits for a predetermined period t3, which is sufficient for such an operation, and performs step 5IIA in FIG.
), the output at that time is stored in the correction circuit 209 (step 5IIB in FIG. 4), and then the coil excitation circuit 2
07,208 to energize the coil 44.45 (step 512 in FIG. 4), this causes the leading blade 42
rotates to the left, the aperture 53 is closed, and both blades 4
0.42 maintains this state by the action of electromagnetic force while resisting the respective springs 41 and 43.

Next, the control circuit 201 triggers the shutter control circuit 208 (step 513 in FIG. 4). As a result, the shutter control circuit 20B stops energizing the leading blade coil 45 by the excitation circuit 208 in response to the vertical synchronization signal (Vd) from the 5SG 202 immediately after this trigger. In this way, the leading blade 42 travels. Thereafter, the previously corrected shirt starter time obtained from the shirt starter time setting circuit 205 is counted, and at the elapsed time point, the excitation circuit 207 is caused to stop energizing the rear blade coil 44. This causes the rear blade 40 to travel.

In this way, proper exposure (main exposure) of the image sensor 51 is performed, and the image information formed by this exposure is read out in synchronization with the next vertical synchronization signal Vd, and the signal processing circuit 204
Processed at Then, it is recorded on a magnetic disk or the like as a so-called 1-field television signal.

Thereafter, when the first switch 214 is turned off (step 514 in FIG. 4), the control circuit 201 switches between the circuits 202 and 209.
210 is stopped (step 515 in FIG. 4),
The DC motor 12 is rotated clockwise (CW) (forward rotation) through the DC motor drive circuit 213 (step 51B in FIG. 4). As a result, mechanical glue setting is performed. Then, when the reset is completed, the wind stop lever 3
By the tip of 4 entering into the recess of the winding stop cam,
When the winding stop switch 3B is turned on (step S17 in FIG. 4), the control circuit 201 turns on the DC motor drive circuit 2.
13 is stopped (step 91B in FIG. 4).

Further, in step SIB, when the movie changeover switch B8 is on (during movie shooting), the control circuit 201 controls the shutter time setting circuit 205 to 1/8
The second time information T corresponding to 0 seconds is outputted (step S19 in FIG. 4), and then the image sensor drive circuit 203 and the aperture value determination circuit 210 are turned on (step 520 in FIG. 4), thereby starting movie shooting. It will be done.

Thereafter, this operating state is maintained until the first switch 214 is turned off (step 52 in FIG. 4).
1), the control circuit 201 turns off both circuits 203 and 210 (step 522 in FIG. 4), and ends the operation.

[Effects of the Invention] As described above, according to the present invention, it is possible to obtain a camera that can perform not only still recording but also movie shooting with simple operations.

[Brief explanation of drawings]

FIG. 1 is an exploded configuration diagram showing an embodiment of an electronic camera to which the present invention is applied, and FIG. 2 is an exploded configuration diagram showing the main parts of FIG. 1. FIG. 3 is a block diagram showing the electrical control system of this embodiment, and FIG. 4 is a flowchart showing an example of a control procedure to be executed by the control circuit shown in FIG. 60...Movie switching operation member, 61...Sliding plate, 63...Sliding plate for shutter release, 68...Movie switching switch.

Claims (1)

[Scope of Claims] 1) A first means for temporarily retracting the reflecting mirror out of the finder optical path in conjunction with the release during still recording; and a first means for temporarily retracting the reflecting mirror out of the finder optical path during movie shooting; 1. An electronic camera comprising: a second means acting on the first means and a second means for holding the shutter device in an open state.