JPH04236937A - Photographing device - Google Patents

Abstract

PURPOSE:To sequentially conduct a series of operations with a simple mechanism by providing a rotating member interlocked with a photographing switch with an operating part of the opening/closing lever of a douser, a stroboscopic switch operating part, and an operating part of the stopping switch of a driving motor. CONSTITUTION:When a photographing switch 105 is pushed, a rotating member 32 is rotated together with a gear 33, and a cam member 35 is also rotated. A reflecting mirror 12 is thus rotated and moved to an evacuated position out of an optical path. A roller R is engaged with an arm lever 40, and a douser is opened by the rotation of the arm lever 40. Almost at the same time, a stroboscopic switch is turned on by the arm lever 40. When the engagement with a roller 16 is transferred from the major diameter part 35d of the cam member 35 to the minor diameter part 35b, the roller R is rotated to turn on a stopping switch. Thus, the structure can be simplified.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a photographic device for photographing the fundus of the eye, for example, and more specifically, a light-shielding curtain is provided in front of the photographic film, which is opened and closed by operating an opening/closing lever. The present invention relates to a photographing device having a finder optical system in which a retractable reflecting mirror is arranged.

0002

2. Description of the Related Art Conventionally, a photographing apparatus shown in FIG. 11 is known as a photographing apparatus for photographing, for example, the fundus of the eye. In FIG. 11, reference numeral 1 designates a quick return mirror that flips up to the position shown by the broken line during photographing, 2 a shutter, 3 a photographic film, 4 an eyepiece lens constituting a finder optical system, and 5 a mirror.

[0003] Now, when you press the photographing switch (not shown),
The quick return mirror 1 flips up to the position shown by the broken line, and then the shutter 2 is opened and a strobe (not shown) is emitted to photograph the fundus on the photographic film 3. Thereafter, the shutter 2 is closed and the quick return mirror 1 returns to the solid line position.

0004

[Problems to be Solved by the Invention] In the conventional photographing device, in order to flip up the quick return mirror 1 and open the shutter 2, a charging means for charging driving power and a charging means for charging the driving power and a charging means for flipping up the quick return mirror 1 and opening the shutter 2 are required. In addition, a series of steps from the quick return mirror 1 jumping up to the broken line position, opening of the shutter 2, strobe light emission, and return of the quick return mirror 1 is required. Since the operations are performed in sequence, there is a problem in that the mechanism for performing each operation becomes complicated.

The present invention has been made in view of the above-mentioned problems, and its object is to provide a photographing device that can perform a series of operations in a sequential manner with a simple mechanism.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a light-shielding curtain in front of the photographic film that can be opened and closed by operating an opening/closing lever, and in front of the light-shielding curtain there is provided a light-shielding curtain that can be retracted out of the optical path. In a photographing device having a finder optical system in which a mirror is arranged, a rotating member is provided that rotates once by a motor each time a photographing switch is pressed, and the reflecting mirror is retracted out of the optical path for a predetermined period of one rotation of the rotating member. an opening/closing lever operation part that operates the opening/closing lever to open the light-shielding curtain during the predetermined period when the rotation of the rotating member enters the predetermined period; a strobe switch operating section that operates a strobe switch for emitting strobe light to emit strobe light when the light-shielding curtain is open; A stop switch operating section for stopping the motor is provided on the rotating member.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a photographing apparatus according to the present invention will be described with reference to the drawings.

In FIGS. 1 to 4, reference numeral 10 denotes a main body portion equipped with a film running mechanism (not shown);
A mirror box section 11 is provided inside the mirror box section 11, and a reflection mirror 12 of a finder optical system is arranged within this mirror box section 11. A light blocking device 60 is arranged behind the reflecting mirror 12, and a film F is arranged behind the light blocking device 60. 80 is a film presser, 82
83 is the camera back, and 83 is the focus glass for the finder optical system.

A shaft 13 is rotatably attached to the rear of the reflecting mirror 12, and both ends of this shaft 13 are attached to the side walls 11a and 11b of the mirror box section 11, so that the reflecting mirror 12 is attached to the shaft. 13 as a fulcrum, it can be rotated to the position shown in FIG. 9 and retracted out of the optical path. A spring 15 is attached to the shaft 13 to constantly bias the reflecting mirror 12 in a counterclockwise direction (in FIG. 1). A stopper member 14 is attached to the side wall 11a, and this stopper member 14 is in contact with the lower surface of the tip of the reflection mirror 12 to position the reflection mirror 12 at an angle of 45 degrees as shown in FIG. . Further, a roller 16 is attached to the left side (in FIG. 2) of the reflecting mirror 12, and this roller 16 is adapted to engage with a cam member 35, which will be described later.

Further, a drive motor 20 is attached to the lower side of the side wall 11a (in FIG. 2), and the tip of the drive shaft 21 of the drive motor 20 protrudes from the side wall 11a to connect the side wall 11a and the main body side wall 10a. It enters a gear chamber 30 formed in between, and a gear 31 is attached to its tip. On the other hand, a rotating member 32 is rotatably attached to the upper side of the side wall 11a, and a gear 33 to which a roller (stop switch operation part) R is attached is attached to one end side (left side in FIG. 2) of this rotating member 32. installed, this gear 3
3 and the gear 31 are connected via reduction gears 34a to 34c, and the rotating member 32 is driven by the drive motor 20.
is rotating.

The other end of the rotating member 32 (right side in FIG. 2)
A cam member (cam portion) 35 that rotates with the rotation of the rotating member 32 is integrally provided in the cam member 35, and the cam member 35 has a large diameter portion 35a and a small diameter portion 35b. This cam member 35 rotates in the direction of the arrow to form a large diameter portion 35a and a small diameter portion 35.
When the boundary portion 35c with the mirror 12 engages with the roller 16 of the reflecting mirror 12, the reflecting mirror 12 is rotated clockwise (in FIG. 1) about the shaft 13 as a fulcrum, and as shown in FIG.
Move it to the position shown.

Further, a curved arm lever 40 is arranged on the side wall 11a so as to overlap the upper peripheral end of the gear 33, and one end of the arm lever 40 is pivotally supported on the side wall 11a by a shaft 40a. The arm lever 40 is held by a stopper (not shown) so as not to rotate counterclockwise from the position shown in FIG.

The inner curved surface of the arm lever 40 engages with a roller R provided on the gear 33 to rotate the arm lever 40 clockwise (in FIG. 3) by θ to move it to the position shown in FIG. An engaging surface 41 is formed so that the arm lever 40 is held at the position shown in FIG. 10 while the roller R moves within the range α. Also,
The roller R is set to engage the engagement surface 41 during a period in which the reflecting mirror 12 is held at the position shown in FIG. 9 by the cam member 35.

The arm lever 40 is provided with a pin (stroboscopic switch operation part) 42 that turns on the contact piece 51 of the strobe switch 50, and the tip of the arm lever 40 is provided with a pin 42 that turns on the contact piece 51 of the strobe switch 50. A protrusion 43 is provided for moving the slide member 61 upward. The pin 42 turns on the contact piece 51 of the strobe switch 50 when the arm lever 40 rotates θ, that is, when the arm lever 40 moves to the position shown in FIG. Then, roller R and arm lever 40
and the protrusion 43 constitute an opening/closing lever operating section.

In FIG. 3, 52 is a stop switch for the drive motor 20, and the contact piece 53 is turned on when the roller R provided on the gear 33 rotates to the position shown by the broken line. Note that the stop switch 52 and the strobe switch 50 are attached to the side wall 11a.

As shown in FIGS. 5 and 6, the light-shielding device 60 includes a light-shielding frame 61 with a light-shielding curtain 62 that can be opened and closed, and the light-shielding curtain 62 is composed of a plurality of light-shielding plates 63. . Each light shielding plate 63 is movable downward,
By this movement, the light shielding curtain 62 is opened and photographing is performed. Each light shielding plate 63 is moved by a link mechanism 65, and when the opening/closing lever 66 having a protrusion 64 is moved in the direction of the arrow, each light shielding plate 63 is moved downward by the link mechanism 65, and the opening/closing lever 66 is moved as shown in the figure. When positioned, each light shielding plate 63 moves upward and the light shielding curtain 62 closes.

Further, as shown in FIG. 7, a slide member 71 is provided on the left side of the front surface of the light-shielding frame 61 (in FIG. 7) so as to be movable up and down. Clamping portions 72, 72 are provided which sandwich the protrusion 64 provided therein. Further, the slide member 71 is provided with elongated holes 73, 73 extending in the vertical direction.
Guide pins 74, 74 provided in the light shielding frame 61 are connected to the elongated holes 73.
, 73 are inserted through the slide member 71 to guide the movement of the slide member 71 in the vertical direction.

A protrusion 75 protruding forward is formed at the upper end of the slide member 71, and the protrusion 43 of the arm lever 40 engages with this protrusion 75, causing the arm lever 40 to rotate clockwise. This causes the protrusion 43 to move the slide member 71 upward. Further, a spring 78 is provided between the rear end portion 76 of the slide member 71 and a pin 77 provided on the light shielding frame 61 below this rear end portion, and the spring 78 always keeps the slide member 71 downward. The opening/closing lever 66 of the light shielding device 60 is kept in the illustrated position to keep the light shielding curtain 62 closed.

FIG. 8 is a block diagram showing the configuration of a drive motor and a control system for controlling light emission of a strobe.

In FIG. 8, 101 is a strobe light emitting circuit that causes the strobe 102 to emit light, and 103 is a drive motor 20.
104 is a control device consisting of a microcomputer, etc., which drives the strobe switch 50.
When turned on, the control device 100 operates the strobe light emitting circuit 101 to cause the strobe 102 to emit light, and when the photographing switch 105 is pressed, the control device 100 operates the drive circuit 1 when the photographing switch 105 is pressed.
03 to drive the drive motor 20, and when the stop switch 52 is turned on, the operation of the drive circuit 103 is stopped and the drive motor 20 is stopped.

Next, the operation of the photographing apparatus constructed as described above will be explained.

Before the photographing switch 105 is pressed, the cam member 35 and the gear 33 are in the position shown in FIGS. 1 and 3 (
(initial position), and when the shooting switch 105 is pressed,
The control device 104 operates the drive circuit 103 to drive the drive motor 20, and the gear 31 rotates together with the drive shaft 21. The rotation of this gear 31 causes the reduction gear 34a to
〜34c, the gear 33 is rotated clockwise (in FIG. 3)
The rotating member 32 rotates together with the gear 33. On the other hand, the cam member 35 also rotates counterclockwise together with the rotating member 32.

Due to the rotation of the cam member 35, the boundary portion 35c of the cam member 35 engages with the roller 16 of the reflecting mirror 12,
Due to this engagement, the reflection mirror 12 is rotated clockwise with the rotation of the cam member 35 and moved to the position shown in FIG. That is, the reflection mirror 12 moves to a retracted position outside the optical path. Thereafter, the roller R provided on the gear 33 engages with the engagement surface 41 of the arm lever 40, causing the arm lever 40 to rotate clockwise about the shaft 40a.

As the arm lever 40 rotates, the protrusion 43 provided at its tip moves the slide member 71 upward. As the slide member 71 moves upward, the lever 66 of the light shielding device 60 is moved upward, and the light shielding curtain 62 is opened. Then, almost at the same time as the light shielding curtain 62 is opened, the pin 42 of the arm lever 40 is moved to the strobe switch 5.
0 contacts 51, 51 are turned on. Strobe switch 5
0 is turned on, the control device 104 turns on the strobe light emitting circuit 1.
01 to cause the strobe 102 to emit light.

While the roller R provided on the gear 33 is in contact with the engagement surface 41, that is, while it is moving within the range α, the arm lever 40 is held at the position shown in FIG. , the light-shielding curtain 62 is kept open, and a fundus image is photographed on the film F. When the roller R passes through the engagement surface 41 and is disengaged, the arm lever 40 rotates counterclockwise, and the slide member 71 is thereby moved downward by the spring 78. Due to this movement, the lever 66 of the light shielding device 60 moves downward and the light shielding curtain 62
is closed.

After that, the cam member 3 engages with the roller 16.
5, the reflecting mirror 12 rotates counterclockwise and moves to the position shown in FIG. 1. After this, the roller R provided on the gear 33
When the stop switch 52 rotates to the broken line position, the contact piece 53 of the stop switch 52 is turned on.

When the stop switch 52 is turned on, the control device 104 stops the operation of the drive circuit 103 and stops the drive motor 20. Due to this stop, the cam member 3
5 and the gear 33 stop at the initial positions shown in FIGS. 1 and 3, and the rotating member 32 rotates once.

In this manner, as the rotating member 32 rotates once, the cam member 35 provided on the rotating member 32 and the roller R of the gear 33 move the reflecting mirror 12 out of the optical path and close the light shielding curtain 62. The structure is simple because a series of operations such as opening/closing operations, strobe light emission, and return of the reflecting mirror 12 are performed in sequence. Furthermore, since the contact piece 51 of the strobe switch 50 is on for a long time in proportion to the length of the engagement surface 41 of the arm lever 40, the strobe can reliably emit light. Furthermore, since the opening time of the light shielding curtain 62 can be set depending on the length of the engagement surface 41 of the arm lever 40,
It is easy to set the opening time. Furthermore, since a light-shielding curtain is used instead of a shutter, the sound during shooting is quiet.

[0029]

As explained above, according to the present invention, as the rotating member rotates once, the cam portion provided on the rotating member, the opening/closing lever operating portion, and the strobe switch operating portion that causes the strobe to emit light are connected. A series of operations such as retracting the reflecting mirror out of the optical path, opening/closing the light-shielding curtain, firing the strobe, and returning the reflecting mirror are performed in sequence using the stop switch operating section that stops the motor. The structure will be simple. Also, since a light-shielding curtain is used instead of a shutter, the sound during shooting is quiet.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing a cross section of a mirror box provided in the main body of a photographing device according to the present invention;

[Fig. 2] A cross-sectional view taken along line A-A in Fig. 1;

[Fig. 3] A cross-sectional view taken along line BB in Fig. 2;

FIG. 4 is a cross-sectional view taken along line C-C in FIG. 3;

[Figure 5
] Rear view of shutter device

[Fig. 6] Front view of the shutter device shown in Fig. 5.

FIG. 7 is an explanatory diagram of the shutter device;

FIG. 8 is a block diagram showing the configuration of the control system of the imaging device;

FIG. 9 is an explanatory diagram showing a rotating state of the reflecting mirror;

[
Figure 10: Explanatory diagram showing the rotated state of the arm lever

[
FIG. 11: An explanatory diagram showing an outline of a conventional photographing device

[Explanation of symbols]

12 Reflection mirror 20 Drive motor 32 Rotating member 35 Cam member (cam part) 40 Arm lever 42 Pin (strobe switch operation part) 43 Protrusion 50 Strobe switch 52 Stop switch 66 Opening/closing lever R Roller (stop switch operation part) F Photographic film

Claims (1)

[Claims] Claims: 1. A photographing device having a finder optical system in which a light-shielding curtain is provided in front of the photographic film and is opened and closed by operating an opening/closing lever, and a reflection mirror that can be retracted out of the optical path is disposed in front of the light-shielding curtain. is provided with a rotating member that rotates once by a drive motor each time the rotating member is pressed, and a cam portion that retracts the reflecting mirror out of the optical path for a predetermined period of one rotation of the rotating member; an opening/closing lever operation unit that operates the opening/closing lever when the period begins to open the light shielding curtain during the predetermined period;
a strobe switch operation section that operates a strobe switch for emitting strobe light to emit strobe light when the rotation of the rotating member enters the opening period of the light-shielding curtain; A photographing device characterized in that the rotating member is provided with a stop switch operation section that operates a stop switch to stop the drive motor.