JP2002090804A - Light quantity controller and camera device provided therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light quantity controller which is easily and inexpensively manufactured and assembled, without having to increase the thickness of a device and making it large-sized and at arranging of two or more blade members, such as a shutter blade and a diaphragm blade to be mutually laid over on one base and to attain the miniaturization of a camera device in which the light quantity controller is incorporated. SOLUTION: In the camera device, there are provided two or more sets of blade members 3 and 5 for shielding an optical axis aperture 8 or for adjusting light quantity with different timing are laid over via an intermediate inclusion board 4 between the pair of base plates 1 and 2, having the optical axis aperture 8 in this light quantity controller; projected parts, joined mutually at the outside of the actuation areas of the blade members 3 and 5, are respectively formed at the pair of the base plates 1 and 2; and the intermediate inclusion board 4 is held and fixed between the projected parts; and the projected parts are integrally projected at the base plates 1 and 2 or are formed of the spacer of a member different from the base plates 1 and 2 in the light quantity controller. With the above-mentioned controller is disclosed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a video camera,
The present invention relates to a light amount control device used for various camera devices such as a steel camera, and more particularly to a light amount control device such as a light amount aperture for restricting the amount of photographing light or a shutter for blocking the amount of photographing light.

[0002]

2. Description of the Related Art Generally, a light quantity control device is mounted on a taking lens unit and has a ring-shaped base having an optical axis opening, and is rotatably mounted on the base so as to face the optical axis opening.
It comprises one or a plurality of blade members and an electromagnetic drive device connected to the blade members and attached to the base. Then, a current is supplied to the electromagnetic drive device to rotate the blade member so as to block the opening of the optical axis or reduce the diameter of the opening.

Recently, Japanese Patent Application Laid-Open No. Hei 10-221740 discloses a system in which a shutter blade for blocking the optical axis opening and a diaphragm blade for regulating the size of the optical axis opening are superimposed on a single substrate to simultaneously adjust the aperture and open and close the shutter. Has been proposed.

In this case, it is necessary to provide an interference preventing plate (hereinafter referred to as an intermediate interposed plate) between the two blades so that the movements of the first and second two blade members having different opening / closing timings do not interfere with each other. This is suggested in the above-mentioned publication. However, if such an intermediate plate is made of a resin molded product as in the case of the base, the thickness of the device becomes large and the production cost increases.

[0005]

SUMMARY OF THE INVENTION According to the present invention, when two or more blade members such as a shutter blade and a diaphragm blade are placed on top of each other and placed on a single base, production and assembly can be performed without increasing the thickness and size of the device. It is an object to provide an easy and inexpensive light amount control device, and to downsize a camera device incorporating these light amount control devices.

[0006]

The present invention is characterized by the following constitution in order to solve the above-mentioned problems. First, the present invention relates to a light amount control device in which two or more sets of blade members for shielding or adjusting the light amount at different timings are superposed between a pair of substrates having an optical axis opening via an intermediate interposed plate. A projecting portion joined to each other outside the operating region of the blade member is formed on each of the pair of substrates, and the intermediate intermediate plate is sandwiched and fixed between the projecting portions, and the projecting portion is attached to the substrate. It is possible to form them with integral protrusions or spacers separate from the substrate.

Further, by forming a protrusion on one of the substrate and the intermediate plate and forming a concave groove corresponding to the protrusion on the other and positioning the intermediate plate, the intermediate plate can be fixed without displacement. With such a configuration, the intermediate plate can be formed of a thin plate having a thickness of 0.3 mm or less.

More preferably, a first substrate to which at least two driving means are attached, a shirt star blade is disposed on the first substrate, and then the aperture blade and the second substrate are sequentially interposed via an intermediate interposition. By arranging and fixing the first and second substrates with fixing means such as screws, the device can be easily assembled.

Further, the intermediate interposed plate is formed by die-cutting processing and is arranged so that the burr side faces the aperture blade side, so that the movement of the shirt star blade which requires high speed operation is hindered by the burr or the like. There is no.

Such an intermediate plate can be manufactured at a lower cost by forming it from the same material as at least one of the blade members, and the material can be a synthetic resin film having a plate thickness of 0.3 mm or less. It is possible, and the device can be provided thin.

The present invention is not limited to the two blade members,
A first substrate having an optical axis opening and having at least three driving means mounted thereon, and a shutter blade disposed on the first substrate, and then a first aperture blade disposed via a first intermediate plate. , The second diaphragm blade and the second intermediate blade via the second intermediate plate.
Are sequentially arranged in this order, and a plurality of protruding portions abutting the first intermediate plate and the second intermediate plate on the first substrate and the second substrate, respectively, outside the operating region of each blade. Is formed, and the first and second intermediate plates are sandwiched between the protruding portions, and the first and second substrates are fixed by fixing means such as screws so that three or more sets of blades are overlapped. It is also possible to configure.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to one embodiment shown in the drawings.

First, as shown in FIG. 1, the light quantity control device of the present invention comprises a shutter blade 3, an intermediate intermediate plate 4, and a diaphragm blade 5 superposed in this order between a pair of upper and lower substrates 1, 2. Drive devices (actuators) 6 and 7 for individually opening and closing the shutter blades 3 and the aperture blades 5 are attached to one of the substrates (the first substrate 1).

The first substrate 1 is made of synthetic resin such as carbon 15
It is formed into a shape that can be incorporated into a camera barrel, which will be described later, by mold molding of polycarbonate containing%. The illustrated substrate 1 has a diameter of 20 mm with the recent miniaturization of camera barrels.

The substrate 1 is provided with an optical axis opening 8 at the center so that the optical axis indicated by XX in FIG. 1 is located, and a pin 9 for bearing the shutter blade 3 is provided on the surface side shown in FIG. ,
10 and a pin 11 for bearing the diaphragm blade 5 are integrally implanted. These pins 9, 10 and 11 may be provided with a pin member separate from the substrate, or may be provided on the second substrate 2 side, and the number and arrangement position thereof are the number of shutter blades and aperture blades described later. Is determined by

On the surface of the first substrate 1, a projection guide 1 for guiding the shutter blades 3 around the optical axis opening 8 is provided.
2 and 13 are provided, and the one shown in the figure has two shutter blades, which will be described later. Therefore, this protruding guide is also a guide 12 that supports the lower blade 3a on the lower side of the superposition facing the first substrate.
And a guide 13 for supporting the upper blade 3b. This protruding guide is formed in a rib shape in a movement locus so as to smoothly slide the blades 3a and 3b,
The shape may be such that a plurality of protrusions are arranged in the direction of movement, or a plurality of protrusions may be formed concentrically.

Therefore, the guide 12 for guiding the blade 3a on the lower side of the superimposition is composed of ribs having a uniform height so as to support the blade in a plane perpendicular to the optical axis. And a rib for supporting the side blade 3b. The guides 12 and 13 have a height difference, and are overlapped with each other so as to form a small gap (space) between the overlapping blades 3a and 3b.
The guide 12 for supporting the upper blade 3b is configured to be high, and the guide 12 for supporting the upper blade 3b is configured to be high.

FIG. 2 shows the thickness of the blade 3a 0.07 mm.
In contrast, the height difference between the guides 12 and 13 is set to 0.2 mm so that a gap of 0.13 mm is formed between the blades 3a and 3b.

The guide 12 has an inclined surface 12s which gradually increases in the closed area of the blade 3a, and the operation of the structure will be described later.

Various configurations of the shutter blades 3 such as two and four are already known, and the illustrated one shows a two-plate configuration as an example. The shutter blades are usually made of a thin plate that has been subjected to black alumite treatment after cutting an aluminum plate, but in this case it is a plate material with a thickness of about 0.3 mm and the inertia when opening and closing the blades is large and it opens and closes at high speed In addition, the torque at the time of starting and at the time of ending is a problem.

Accordingly, the shutter blades shown in the drawings are made of a resin film, for example, a resin film having a thickness of 0.07 mm by punching a resin film, for example, a polyester film containing a black pigment, annealing and applying a matting coating having a light-shielding property. .

The two blades 3a and 3b shown in the figure have an arcuate curved portion 3 inside so as to open and close the optical axis opening 8 in two.
1a and 31b, and the tips 32a and 32b are formed so as to overlap each other even in the fully opened state. Engagement holes 33a and 33b are formed at the base end of each blade to fit the pins 9 and 10 implanted in the first substrate 1. Therefore, the blade 3 swings right and left around the pins 9 and 10 to open and close the optical axis opening.

As described above, the shutter blades 3 are incorporated into the first substrate 1 and then the aperture blades 5 are incorporated. In order to prevent interference between the blades, an intermediate intermediate plate 4 having the following structure is provided. The illustrated intermediate plate 4 is formed of a flat plate member and is formed on the first substrate 1 having the shutter blades 3 incorporated therein so as to form a small gap with the blades, for example, 0.2 mm to 0.4 mm. Protrusions 15a, 15b, 1 provided
5c and 15d are mounted and attached. In addition, positioning holes 41 and 42 are formed in the intermediate interposition plate 4 so that the positioning holes 41 and 42 are fitted to the positioning pins 16 and 17 implanted in the first substrate 1 so that the positions thereof are guaranteed.

The first substrate 1 has receiving portions 13 and 14 for fixing screws for mounting the second substrate 2 described later, and the intermediate intervening plate 4 has cutouts 43 so that the receiving portions 13 and 14 escape. Has become.

Reference numeral 44 denotes a relief hole for the pins 9 and 10 of the substrate 1, and reference numerals 45 and 46 denote fitting grooves for a transmission member of a drive device described later.

Next, a method of forming the intermediate plate 4 will be described. The intermediate plate 4 may be formed by punching a thin plate of aluminum or the like by press working and then subjecting it to an alumite surface treatment. Then, the surface on which burrs are generated is mounted on the first substrate with the surface facing the diaphragm blade facing the shutter blade.

By forming the intermediate intermediate plate 4 by pressing a thin plate in this way, it is possible to reduce the thickness by about several millimeters as compared with a case where the intermediate intermediate plate 4 is formed by a synthetic resin mold. The intermediate intermediate plate 4 shown in the drawing is formed by punching a polyester film (thickness 0.7 mm) containing a black pigment in the same manner as the shutter blade 3, annealing the resultant, and then applying a matting coating having a light-shielding property. The burr surface side at the time of die-cutting is located on the diaphragm blade side.

Next, the structure of the aperture blade 5 will be described. The blade 5 has various configurations such as a single-blade configuration and a double-blade configuration as shown in the drawing, and many of them can be employed in the present invention. The illustrated aperture blade 5 is formed by die-cutting and annealing a polyester film (thickness: 0.7 mm) containing a black pigment, and then applying a matting coating having a light-shielding property. In other words, the shutter blade, the intermediate plate, and the aperture blade shown in the drawing are all made of the same material by die cutting, so that in the manufacturing process, these three types of parts can be processed in the same process, and the cost merit is great.

The aperture blade 5 has an optical axis opening 8, an engaging hole 51 for the pin 11 implanted in the first substrate, and a slit 52 for engaging with a transmission member of a driving device described later.
The pin 11 implanted in the first substrate 1 penetrates the notch groove 45 of the intermediate interposition plate 4 and fits into the engagement hole 51 of the diaphragm blade 5.

The shutter blade 3, the intermediate intermediate plate 4, and the diaphragm blade 5 assembled on the first substrate 1 are superposed in this order, and the second substrate is sandwiched with the intermediate intermediate plate 4 as shown in FIG. By attaching 2 to the first substrate 1, each component is fixed and assembled.

The second substrate 2 is formed by stamping a metal plate of aluminum or the like.
There are formed holes 21a, 21b, 21c and 21d to be fitted into the pins 9, 10 and 16 and 17 implanted in the holes. The second substrate 2 has tab-shaped projections 22a, 22b, 22c, and 22d projecting to the back side of the sheet of FIG.
Are the projections 15a, 15b, 15c, 1 of the first substrate 1.
5d are formed at positions where they are joined to each other. Accordingly, the intermediate interposition plate 4 is provided with the protrusions 15a, 15b of the first substrate 1,
15c, 15d and the protruding portions 22a, 22b of the second substrate 2,
22c and 22d, and the two substrates are fixed with a fixing screw 60.
The shutter plate 3a, 3b is supported between the intermediate intermediate plate 4 and the protruding guides 12, 13 of the first substrate 1, and the intermediate intermediate plate 4 The diaphragm blade 5 is supported between the second substrate 2 and the second substrate 2.

The aperture blade 5 is shown by punching and forming a black polyester film into the shape shown in the figure, but an ND filter (neutral dens
Of course, it is also possible to attach an ity filter). Therefore, a driving device for opening and closing the shutter blade 3 and the aperture blade 5 having such a configuration will be described.

A drive device 6 for shutter blades is mounted on the back surface (shown in FIG. 2) of the first substrate 1 with the same configuration as a drive device 7 for aperture blades.

The same numbers are assigned to the two driving devices 6,
7, the first substrate 1 is integrally formed with the flanges 61 and 6.
A bracket-shaped holding member 63 is attached to the two flanges 61 and 62 with fixing screws 64. In the space between the back surface of the first substrate 1 and the holding member 63, the following magnet rotor 65, magnetic force induction members 66, 6
7 and the coil 68 are held.

First, the magnet rotor 65 is integrally formed by press-fitting a shaft member 65b made of synthetic resin into a cylindrical magnet 65a made of a ferromagnetic material, for example, a rare earth, which is excited so as to face the NS. Is integrally formed with an arm-shaped transmission member 69, which is engaged with the slits 34 a 34 b and 52 of the blade members 3 and 5.

The coil 68 is formed by spirally winding a conductive wire around a coil frame 68a having a hollow cylindrical shape (in the figure, a prismatic shape), and the coil 68 has a cylindrical shape as a whole.

Therefore, the cylindrical magnet rotor 65
And the coil 68 are arranged side by side in the optical axis (XX) direction. This is because the magnet rotor 65 and the coil 68, which usually have a cylindrical shape, are arranged side by side in the same direction so that the space occupied can be reduced, and it is most efficient to arrange them along the optical axis direction. It is based on the knowledge.

Therefore, the magnet rotor 65 and the coil 68 are mounted between the first substrate 1 and the holding member 63 as follows. First, the magnet rotor 65 has its shaft 65
Both ends of b are fitted and supported in the fitting hole 70 of the first substrate 1 and the fitting hole 71 of the holding member 63, and the magnet rotor 65 is rotatably supported. The coil 68 is sandwiched between a pair of magnetic induction members 66 and 67 described below, and the magnetic induction members 66 and 67 are fixed between the first substrate 1 and the holding member 63.

The coils 68 arranged in parallel as described above
The magnet rotor and the magnet rotor are magnetically coupled by a pair of magnetic force guiding members 66 and 67 so as to form an NS pole around the magnet rotor 65 by a magnetic field generated in the coil.

That is, the base ends 66a, 67a of the magnetic force guiding members 66, 67 are fitted to the hollow opening ends of the coil 68, and one end faces the magnetic field generated in the coil. The magnet rotor 65 is arranged so as to face each other with a small space around it.

The central portions of the magnetic force guiding members 66 and 67 are used as mounting seats 66c and 67c to hold the first substrate 1 and the holding member 63 together.
And is fixed by screwing the holding member.

The dowels 66e,
67 e is fitted and positioned in the hole 72 of the first substrate 1 and the hole 73 of the holding plate 63, and the proximal end 66 of the magnetic force guiding member 63 is positioned.
a and 67a are fixed together between the substrate 1 and the holding plate 63 in combination with each other so as to keep the distance L as shown in FIG. At this time, the magnetic force induction members 66 and 67 have at least one bent portion 66f, 67f, and the tip portions 66b, 67b form a magnetic pole at approximately the center 1 / 2L of the longitudinal length L of the coil 68. Has become.

In the drawing, the longitudinal length m of the magnet rotor 65 is smaller than the longitudinal direction L of the coil 68.
m, a step 72 is provided on the holding member (bracket) 63 side with respect to the substantially flat back surface of the first substrate 1, and a large coil mounting portion is provided between the first substrate 1 and the holding member 63. An interval L and a small interval m for mounting the rotor are formed.

Therefore, the bent portions of the magnetic force guiding members 66 and 67 have one 66f smaller and the other 67f larger bent. Preferably, the bending amount of both can be made equal so that the magnetic resistance can be made equal. It is possible to arbitrarily deviate this to either one in the layout of the component parts.

Therefore, the following magnetic fields are generated in the driving devices 6 and 7, respectively.

The magnet rotor 65 is magnetized so that two poles NS are opposed to each other at a 180-degree interval, and around the two ends, the tip ends 66b, 6 of a pair of magnetic force induction members 66, 67 are provided.
7b are disposed so as to face each other at an interval of 180 degrees, and the tip curved portions 66b and 67b minimize the distance from the rotor 65. Therefore, the coil 68 at the base end of the magnetic force induction member 66
When no current is supplied to the rotor, the rotor 65 is always
b or 67b receives an attraction action, and the energization of the coil 68 causes any one of N-3 magnetic poles to be generated in the curved portion at the tip, thereby receiving a rotating force in the opposite direction. The rotor 65 is provided with a slit 7 formed in the first substrate 1.
At 4 and 75, the rotation angle is regulated between the open position in FIG. 5 and the closed position in FIG. In other words, when the coil is not energized at the position shown in FIG. 5, the rotor 65 receives a rotational force in the counterclockwise direction, and is blocked by the edges of the slits 74 and 75 and holds that position. Next, a current is supplied to the coil 68 to change the same magnetic pole as the magnetic pole of the magnet rotor to the magnetic force induction members 66b and 67.
b, the rotor 65 repels each other and rotates in the clockwise direction. When the current is cut off after the neutral point, the rotor 65 is turned to the opposite magnetic force guide members 66b, 6 on the opposite side.
7b, and is rotated clockwise until stopped at the edges of the slits 74, 75 in FIG. In this way, the blade operates from the open state to the closed state and is held at that position. Conversely, when a current in the opposite direction is applied to the coil 68, the blades similarly operate from a closed state to an open state.

Next, the operation of such a device will be described. The above-described light amount control device is incorporated in a camera device, for example, as shown in FIG.

The light amount control device (160 in FIGS. 1 and 2) is incorporated between a front lens group 140 and a rear lens group 150 which are attached to a lens unit (lens barrel) 110 of the camera body 100 in a plural-lens configuration. Have been.

The lens unit 110 is provided with a photoelectric conversion element 190 such as a CCD for photoelectrically converting light from the rear lens group 150. The lens unit 110 is electrically connected to the control board 180 on the camera body 100 side to adjust the timing of power supply. Controlled. The control microcomputer of the apparatus is incorporated in the control board 180, and the photographing is executed by operating the shirt button 200.

The control circuit of the camera device will be described with reference to FIG. 8. Reference numeral 3 denotes a shutter blade, 5 denotes an aperture blade,
EMO indicates electromagnetic drive means for driving the aperture, and SMO indicates electromagnetic drive means for driving the shutter. 140 is a front lens, 150 is a rear lens, 190 is a photoelectric conversion element,
GPS is an image signal processing circuit for performing processing such as storing the image signal output from the photoelectric conversion element 190, SW1 is a release switch operated by the shutter button 200, SW2 is a main switch, and CPU is a microcomputer. Further, SMC is an electromagnetic driving means SM for driving a shutter.
A shutter driving circuit for supplying a driving signal to O; an EMC, a diaphragm driving circuit for supplying a driving signal to electromagnetic driving means EMO for driving the diaphragm; a CCD-MC, an electronic shutter for controlling charge accumulation and charge release of the photoelectric conversion element 190 Each of the control circuits is shown.

The operation of the apparatus will now be described with reference to FIG. 9. When the apparatus is not operated, the shutter blade 3 is set to the open state, that is, the state on the right side in FIG. 1, and the aperture blade 5 is indicated by the solid line in FIG. Initially set to the fully open state shown.

In this state, when the power of the camera body is turned on and the camera is set to the photographing state, the amount of light from the subject is received by the CCD, and the microcomputer sets the aperture value. The aperture value shown in two stages is a fully opened state in which the aperture blade does not restrict the optical axis aperture 8 (a state shown by a solid line in FIG. 1) and a closed state in which the aperture is reduced to a small diameter (a state shown by two-point hatched lines in FIG. 1). Set by microcomputer. Now, when the release button 200 is operated and the microcomputer sets a small aperture, the aperture driving circuit EMC operates to supply a current to the coil 68 of the driving device 7. Then, the diaphragm blades 5 move from the state shown by the solid line in FIG. 1 to the state shown by the two-point hatched lines in FIG. 1 to restrict the optical axis opening 8 to the small diaphragm state.
This state is maintained even after the magnet 65a is attracted by the magnetic force induction member 66b and the supply current is cut off. Further, the microcomputer calculates the exposure time, and after the elapse of a predetermined delay time, first resets the charge of the photoelectric conversion element 190 and issues a closing instruction signal of the shutter blade 3. After the reset, the amount of light from the subject is stored in the photoelectric conversion element 190 as an image, and upon receiving the closing instruction signal of the blade 3, the shutter driving circuit SMC supplies a predetermined current to the coil 68 of the driving device 6. Then, the shirt blade 3 is closed from the open state shown on the right side of FIG. 1 to the closed state shown on the left side of FIG. 1, and the charge accumulation of the photoelectric conversion element 190 is completed. Circuit G
The data is sent from the PS to an internal or external memory and stored as an image signal. Thereafter, a current is supplied to the drive unit 7 of the diaphragm blade 5 by a signal from the computer, the blade is retracted from the optical axis opening 8, and similarly, the current is supplied to the drive coil of the shutter blade 4 so that the closed state is opened from the closed state. The camera will return and be ready for the next shooting.

When the microcomputer sets the aperture value to the fully open state, no signal is issued to the aperture drive circuit EMC and no current is supplied to the drive device 7, so that the aperture blade 5 is maintained in the fully open state.

The case where the present invention is constituted by the two blade members of the shirt blade and the aperture blade has been described above.
FIG. 11 shows three blade members 3, 5 of a shirt star blade 3 and first and second aperture blades 5a, 5b.
a and 5b are shown. As described above, the present invention is not limited to the two blade members, and the third and fourth blade members are sequentially overlapped with the intermediate substrate interposed therebetween to fix the first substrate and the second substrate. It is also possible to hold and fix the intermediate plate, which will be described with reference to FIGS.

An optical axis opening 8 is formed in the first and second pair of substrates 1 and 2 in the same manner as described above. The first substrate 1 is molded from synthetic resin, and the second substrate 2 is formed from a thin plate. The first substrate 1 is manufactured by punching, and three driving devices 6, 7, and 8 having the same configuration as those described above are arranged on the outer periphery of the optical axis opening 8 on the first substrate 1. The first substrate 1 has the shirt blades 3 incorporated therein in the same manner as the above-described two-layered structure. The first diaphragm blades 5a are further disposed on the first substrate 1 via the first intermediate plate 4a. Second intermediate plate 4
The second diaphragm blade 5b is incorporated through the second substrate 2b so that the second substrate 2 covers the uppermost portion.

The first diaphragm blade 5a and the second diaphragm blade 5b have openings 8a and 8b smaller in diameter and different in size than the optical axis opening 8 of the substrate at the center of the optical axis. Accordingly, the light quantity of the photographing light can be adjusted in three stages in the order of the optical axis opening 8, the large diameter aperture 8a, and the smaller diameter aperture 8b. The first and second intermediate plates 4a and 4b, the shirt blade 3 and the first and second aperture blades 5a and 5b are each made of a polyester film (0.07 mm thick) containing a black pigment at the optical axis center. After die-cutting and annealing, it is made by applying a matte coating having a light-shielding property. Therefore, the first projections 18a, 18b, 18 supporting the first intermediate plate 4a are provided on the first substrate 1.
c and 18d are formed at four places, and the second protrusions 19 supporting the second intermediate plate 4b at different positions
a, 19b, 19c, and 19d are formed at four places. The first projections 18a, 18b, 18c, 18d are
The projections 19a, 19b, 19c, and 19d have a lower height difference than the first projections 18a, 18b, and 18d.
The first intermediate plate 4a is supported by c and 18d. At this time, the first intermediate intervening plate 4a is formed with a notch portion 48 for escaping the second projecting portions 19a, 19b, 19c, 19d.

The first diaphragm blade 5a is assembled on the second intermediate plate 4b, and then the second intermediate plate 4b
Are supported on the second protrusions 19a, 19b, 19c, and 19d, and the second aperture blade 5b is mounted thereon. Therefore, the second substrate 2 is provided with third protrusions 28a, 28b, 28c, 28d that match the first protrusions 18a, 18b, 18c, 18d and second protrusions 19a, 19b, 19c, 19d. Fits fourth
Are formed, and the third protrusions 28a, 28b, 28c, 28d are higher than the fourth protrusions 29a, 29b, 29c, 29d. The second intermediate intervening plate 4b is provided with an escape portion 49 formed of a notch so that the third projecting portions 28a, 28b, 28c, 28d penetrate. Therefore, if the second substrate 2 is fixed to the first substrate 1 with screws 60, the first intermediate plate 4a will have the first protrusions 18a, 18b, 1
8c, 18d and third protrusions 28a, 28b, 28c,
28d, the second intermediate plate 4b is connected to the second projections 19a, 19b, 19c, 19d and the fourth projection 2
9a, 29b, 29c, and 29d are sandwiched and fixed respectively. The first substrate 1 is provided with positioning pins 16 and 17 penetrating the first and second intermediate plates 4a and 4b, so that the positions of the positioning pins 16 and 17 are guaranteed. Although the first to fourth projecting portions 18, 19, 28, and 29 are respectively formed at four positions, the number may be more than three or three or two. The method of transmitting the drive between the driving means 6, 7, 8 and the shirt blade 3 and the first and second aperture blades 5a, 5b is the same as that described above, and the operation thereof is also the same, so that the description is omitted.

[0058]

According to the present invention, when two or more blade members, such as shirt blades and aperture blades, are placed on top of each other on a single substrate, the apparatus can be manufactured and manufactured without being thick and large. It is possible to provide an inexpensive light amount control device that is easy to assemble.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, and is an exploded perspective view of a front side of a light amount control device.

FIG. 2 is a diagram showing the embodiment of the present invention, and is an exploded perspective view of the back side of the light amount control device.

FIG. 3 is a diagram showing the embodiment of the present invention, and is a partial cross-sectional view of a main part of the light amount control device.

FIG. 4 is a view showing the embodiment of the present invention, and is a partial cross-sectional view of a main part of the light amount control device.

FIG. 5 is a view showing the embodiment of the present invention, and is a plan view of a main part of a driving device in the light amount control device.

FIG. 6 is a view showing the embodiment of the present invention, and is a plan view of a main part of a driving device in the light amount control device.

FIG. 7 is a view showing the embodiment of the present invention, and is a perspective view of a camera device incorporating the light amount control device.

FIG. 8 is a diagram illustrating an embodiment of the present invention, and is a control circuit configuration diagram of a camera device incorporating a light amount control device.

FIG. 9 is a diagram showing an embodiment of the present invention, and is a timing chart of a camera device incorporating a light quantity control device.

FIG. 10 is a view showing another embodiment of the present invention, and is an exploded perspective view on the front side of the light amount control device.

FIG. 11 is a view showing another embodiment of the present invention, and is a partial cross-sectional view of a main part of a light quantity control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st board | substrate 2 2nd board | substrate 3 Shutter blade 4 Intermediate intermediate plate 4a 1st intermediate intermediate plate 4b 2nd intermediate intermediate plate 5 Aperture blade 5a 1st aperture blade 5b 2nd aperture blade 6 Shutter drive device 7 Aperture Drive device 15 Projection 22 Projection

Claims (10)

[Claims] 1. A light amount control device in which two or more sets of blade members for blocking or adjusting the light amount at different timings between a pair of substrates having an optical axis opening are overlapped via an intermediate interposition plate. A light amount control device, characterized in that projecting portions that are joined to each other outside the operating region of the blade member are formed on each of the pair of substrates, and the intermediate plate is sandwiched and fixed between the projecting portions. 2. The light amount control device according to claim 1, wherein the projecting portion is formed by a projection integral with the substrate or a spacer formed separately from the substrate. 3. The light amount control device according to claim 1, wherein a positioning projection is formed on one of the substrate and the intermediate intermediate plate, and a concave groove is formed on the other of the positioning projection and the projection. 4. The light amount control device according to claim 1, wherein the intermediate intermediate plate is formed of a thin plate having a thickness of 0.3 mm or less. 5. The blade member is constituted by a shirt blade that blocks the optical axis opening and a diaphragm blade that regulates the diameter of the optical axis opening. An intermediate plate is provided between the shirt star blade and the diaphragm blade. The light amount control device according to claim 1, wherein the light amount control device is arranged. 6. A first substrate to which at least two driving means are attached, a shirt blade arranged on the first substrate, and an aperture blade and a second substrate arranged in this order via an intermediate member. 6. The light amount control device according to claim 1, wherein the first and second substrates are fixed by fixing means such as screws. 7. The light amount control device according to claim 5, wherein the intermediate plate is formed by die-cutting processing, and is arranged so that a burr side faces a diaphragm blade side. 8. The light amount control device according to claim 1, wherein the intermediate plate is formed of the same material as at least one of the blade members. 9. The light quantity control device according to claim 9, wherein the material is a synthetic resin film having a thickness of 0.3 mm or less. 10. A first substrate having an optical axis opening and having at least three driving means mounted thereon, and a shirtter blade disposed on the first substrate, and then the first substrate is interposed via a first intermediate plate. The first diaphragm blade is connected to the second intermediate plate via the second intermediate plate.
Aperture blades and the second substrate are sequentially arranged in this order, and the first intermediate plate and the second intermediate plate are provided on the first substrate and the second substrate, respectively, outside the operation region of each blade. A light quantity control device in which a plurality of projecting portions that are in contact with each other are formed, the first and second intermediate plates are sandwiched between the projecting portions, and the first and second substrates are fixed by fixing means such as screws.