JP2006072174A - Blade driving device for camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade driving device for cameras, which is advantageous in thickness reduction and is low-cost. <P>SOLUTION: Pedestal parts 1f, 1g, 1h, and 1i having a prescribed height are formed at four corners of a main base plate 1 made of a synthetic resin, and shaft parts 1j, 1k, 1m, and 1n are stood on them. Shaft parts 1p and 1q are stood on a plate surface of the main base plate 1. An aperture plate 7 has holes 7f and 7g fitted to shaft parts 1p and 1q and has a hole 7e fitted to a shaft part 2i of a frame plate 2 for actuator attachment, which pierces the main base plate 1, and is fixed by deforming front ends of the shaft parts 1p, 1q, and 2i into collar shapes by heat melting. An auxiliary base plate 9 constituting a blade chamber between the plate itself and the aperture part 7 has holes 9e, 9f, 9g, and 9h fitted to shaft parts 1j, 1k, 1m, and 1n and is fixed by deforming front ends of the shaft parts 1j, 1k, 1m, and 1n into flange shapes by heat melting. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a camera blade driving device in which shutter blades, diaphragm blades, and the like are driven by a motor.

  Among camera shutter devices, there is known a device that opens and closes a circular exposure opening by reciprocally rotating two shutter blades simultaneously in opposite directions or by reciprocating linearly. However, the shutter device having such a configuration is employed in both a silver salt film camera and a digital camera (a camera using a solid-state imaging device such as a digital still camera, a digital video camera, and a camera for various information terminal devices). ing. In particular, recently, there is an apparatus that can be incorporated into a small information terminal device, and that opens and closes an exposure opening by reciprocatingly rotating a single shutter blade.

  Also, in recent camera diaphragm devices, two diaphragm blades are simultaneously rotated in opposite directions or operated linearly to stop at a predetermined aperture opening restriction position. In the case of a miniaturized popular camera, a single aperture blade with a small circular aperture opening is taken into the exposure aperture to shoot with a small aperture and retract. Increasing the number of apertures that can be used for shooting with a large aperture. The diaphragm device having such a configuration is employed in both a silver salt film camera and a digital camera in the same manner as the above-described type of shutter device.

  Further, an ND filter device is known as a device for reducing the amount of photographing light as in the case of the diaphragm device. However, as a recent ND filter device, a circular opening such as the above-described diaphragm blade (the opening in this case is The blade member formed with a ND filter plate so as to cover the opening portion may be used as a filter blade. In general, the diaphragm blades are operated in the same manner as the diaphragm blades. However, other than that, the ND filter plate in the shape of a blade is used as a filter blade, or such a blade-shaped ND filter plate is composed of two blade members having a circular opening as described above. Also known is a sandwiched filter blade made up of three sheets. And the filter apparatus of such a structure can be employ | adopted for a silver salt film camera and a digital camera similarly to said shutter apparatus and aperture_diaphragm | restriction apparatus.

  In the case of such a blade drive device for a camera such as a shutter device, a step motor or an electromagnetic plunger may be used as an actuator serving as a drive source. Many current-controlled actuators called magnet-type motors are used. Various configurations of this actuator are known mainly because of the difference in the configuration of the stator. However, in any configuration, basically two poles (or four in the radial direction) are used. A permanent magnet rotor magnetized in the pole) can rotate in a direction corresponding to the energization direction of the stator coil only within a predetermined rotation angle range.

  In such a shutter device, a diaphragm device, and a filter device, each device may be manufactured as one unit, but may be manufactured as one unit together with other one or two devices. In the case of the shutter device, the opening shutter blade and the closing shutter blade may be individually operated by respective driving sources. Further, in the case of a diaphragm device, in order to individually operate a plurality of diaphragm blades having different sizes of circular diaphragm openings by respective driving sources, the plurality of diaphragm devices are combined into one unit. In the case of a filter device, a plurality of filter devices are manufactured as a single unit so that a plurality of filter blades having different concentrations can be individually operated by respective driving sources. Sometimes. When such a plurality of devices are manufactured as a single unit, an intermediate plate (such as a partition plate) is provided between the main ground plate and the auxiliary ground plate in order to prevent collision between the blades operated by the respective driving sources. It is known that the blades are partitioned and the blades are arranged in separate blade chambers (see Patent Document 1 below).

In addition, since the above main plate is required to have a complicated shape and a predetermined rigidity in order to attach various components, in recent years, it is almost always manufactured as a relatively thick plate member using a synthetic resin material. ing. On the other hand, recent cameras have been required to be thinner, but in order to meet the demand, it is necessary to dispose the photographing lens as close as possible to the operation surface of the blade member. Therefore, the aperture for the imaging optical path provided on the main base plate is a large aperture that allows a part of the imaging lens to enter, and instead, a thin aperture is formed to regulate the exposure aperture. There is known a blade driving device (see Patent Document 1 below) in which a plate member (referred to as a caliber plate or the like) is attached to a surface of a main ground plate on the blade chamber side. The present invention relates to a blade driving device having a configuration in which such an intermediate plate or a caliber plate is attached between a main ground plate and an auxiliary ground plate.
Japanese Patent Laid-Open No. 2000-60088 Japanese Utility Model Publication No. 7-36141

  By the way, as described in Patent Document 2, conventionally, when a caliber plate and an auxiliary ground plate are attached to a main ground plate, it is usually fixed by screws at a portion where these three plate members are superposed. Met. However, recently, along with the thinning of the camera as described above, the blade driving device is also required to be thin, and the thickness dimension when these three plate members are fixed is higher than the reference dimension. Although it is necessary to obtain accuracy, as long as it is fixed at the overlapping position of the three plate members as described above, the desired tolerance is achieved in mass production by accumulating the allowable tolerances defined for each plate member. It was extremely difficult to efficiently produce a match. Moreover, in order to be able to manufacture efficiently, the tolerance of the thickness dimension of each plate member must be tightened to the order of 1/100 mm, which increases the part processing cost. There was a problem of end.

  Therefore, as an alternative measure, the outer diameter of the caliber plate is made smaller than the main ground plate and the auxiliary ground plate, and is attached to the main ground plate in advance, and the two plate members are fixed at the overlapping portion of the main ground plate and the auxiliary ground plate. Although it was tried, in that case, although it is possible to obtain the above thickness dimension with relatively high accuracy, it is necessary to attach the caliber plate and the auxiliary base plate separately to the main base plate, There are problems that a lot of screw parts for mounting are required and the cost becomes high. These problems can be completely applied to the blade driving device in which the intermediate plate is attached to form two blade chambers between the main ground plate and the auxiliary ground plate.

  The present invention has been made to solve such problems, and the object of the present invention is to relatively attach the above three plate members without using special attachment parts. It is possible to provide a low-cost camera blade driving device that is advantageous in reducing the thickness of a camera and that is configured to obtain the thickness dimension of these three attached states with high accuracy. It is.

  In order to achieve the above object, the camera blade drive device of the present invention is provided with at least one base portion having a predetermined height on the surface of the blade chamber side and at least one first shaft portion standing upright. The main base plate made of synthetic resin with which at least one second shaft portion is erected on the base portion, and at least one hole to be fitted to the first shaft portion, the hole Is fitted into the first shaft portion, and then the tip end of the first shaft portion is melted into a bowl shape to be fitted into the aperture plate attached to the main base plate and the second shaft portion. A hole is provided, and after fitting the hole to the second shaft portion, the tip of the second shaft portion is thermally melted to form a bowl shape, and is attached to the main base plate and between the aperture plate. Auxiliary base plate constituting the blade chamber, and an auxiliary ground plate arranged in the blade chamber and going to the main base plate At least one blade is caused to advance and retreat in the exposure opening is restricted by an opening formed in the bore plate and operably attached, so that has a.

  In order to achieve the above object, the camera blade driving device of the present invention includes at least one first base portion having a predetermined height from the blade chamber side surface and at least one higher than the first base portion. A second base portion, and at least one first shaft portion is erected on the first base portion, and at least one second shaft portion is erected on the second base portion. It has a resin main base plate and at least one hole to be fitted to the first shaft portion, and after the hole is fitted to the first shaft portion, the tip of the first shaft portion is thermally melted. An intermediate plate that is attached to the main base plate and forms a first blade chamber between the main base plate and a hole that fits into the second shaft portion is formed between the main base plate and the hole. After being fitted to the second shaft portion, the tip of the second shaft portion is thermally melted to form a bowl shape, and is attached to the main base plate. An auxiliary ground plate constituting a second blade chamber between the intermediate plate and the main plate, the intermediate plate disposed in the first blade chamber and attached to the main ground plate so as to be able to reciprocate. , At least one first blade that is advanced and retracted to an exposure opening that is regulated by an opening formed in one of the auxiliary ground plates, and a reciprocating operation with respect to the main ground plate that is disposed in the second blade chamber And at least one second blade that is attached to be able to be moved forward and backward with respect to the exposure opening.

  And in those cases, even after the auxiliary ground plate is fitted to the second shaft portion in the region facing the tip of the first shaft portion, the hole provided in the auxiliary ground plate is fitted to the second shaft portion. In order to be able to heat-dissolve the tip of the first shaft part and make it into a bowl-like shape, if it has a deficient part of a predetermined size, it is due to heat melting of the first shaft part and the second shaft part. Installation work can be performed continuously, and the work efficiency can be improved, and the actuator chamber of each blade is provided between the main ground plate and the main ground plate on the side opposite to the blade chamber side. A synthetic resin frame plate is disposed, and at least one of the first shaft portion and the second shaft portion is erected on the frame plate and penetrates the main ground plate. As long as the shaft part is the same, the actuator frame can be attached in the same machining process. To become. Further, the main base plate has an annular wall portion having at least a height from a surface on the blade chamber side to a flange-shaped portion formed by thermally melting the tip of the second shaft portion at an outer peripheral edge thereof. If it is formed in this way, it is advantageous in terms of dust-proof measures.

  The camera blade drive device of the present invention is a camera blade drive device in which a caliber plate or an intermediate plate is attached to the main ground plate in addition to the auxiliary ground plate, but the assembled state of these three plate members The thickness dimension is determined by the thickness dimension of the overlapping portion of the two plate members of the main ground plate and the auxiliary ground plate, and these plate members can be assembled without using dedicated mounting parts. Therefore, the above-described thickness dimension can be obtained with high accuracy, and a low-cost camera blade driving device can be obtained.

  Embodiments of the present invention will be described with reference to the illustrated examples. In addition, the embodiment is configured as a shutter device that can be used for both a silver salt film camera and various digital cameras, and the operation thereof will be described in the case of being used for a digital camera. I will decide. FIG. 1 is a front view of an embodiment showing a fully opened state (initial state) of the shutter blades when viewed from the subject side when incorporated in the camera, and FIG. 2 is a cross-sectional view of the main part of FIG. . 3 is a rear view of FIG. 1, and FIG. 4 is a rear view of FIG. 1 shown in a state before the auxiliary ground plate is attached.

  First, the configuration of the present embodiment will be described. In this embodiment, only the shutter device is configured as one unit. The main base plate 1 is formed with a relatively thick synthetic resin material because a complex shape and a predetermined rigidity are required to attach an actuator, a shutter blade, and the like, which will be described later. As shown in FIG. 1, the main base plate 1 is formed with a circular opening 1a for the photographing optical path, but this opening 1a is not for restricting the exposure opening, but a camera. In order to be able to receive a part of the photographing lens disposed on the object side inside, the diameter is larger than the exposure aperture. The main base plate 1 is provided with two wall portions 1b and 1c that are formed in parallel and symmetrical in the upper position on the front side (the subject side when incorporated in the camera) in FIG. , Positioning holes 1d and 1e are respectively formed on the top surfaces.

  The frame body 2 shown in FIGS. 1 and 2 is made of synthetic resin, and the two positioning pins 2a and 2b provided on the back side of FIG. 1 are inserted into the positioning holes 1d and 1e. The actuator chamber is formed between the main plate 1 and the main base plate 1. The frame plate 2 also serves as a constituent member of the actuator, has a bobbin portion formed in a cylindrical shape, and a coil 3 is wound around the outer periphery thereof. Further, two positioning pins 2c and 2d and a hooking portion 2e are provided on the surface of the frame body 2. The flexible printed wiring board 4 has two holes 4a and 4b provided in the land forming portion. The wiring part is hung on the hook part 2e by fitting with the pins 2c and 2d.

  Further, two grooves 2f and 2g are formed on the subject side surface of the frame body 2, and both ends of the coil 3 are wound in the grooves 2f and 2g. Soldered to one land. The U-shaped yoke 5 has two leg portions as magnetic pole portions, and one of the leg portions is inserted into the hollow portion of the bobbin portion around which the coil 3 is wound. In this embodiment, the frame 2 also serves as the bobbin of the coil 3. However, for example, as in the same type of current control type actuator described in Japanese Patent Application Laid-Open No. 2003-186079, another frame 2 is used. You may comprise as a member.

  In FIG. 1, two shaft portions 2 h and 2 i are erected on the back side of the frame plate 2. Among them, a rotor 6 having a cylindrical permanent magnet is rotatably attached to the shaft portion 2h (in FIG. 2, only the permanent magnet is indicated by a one-dot chain line). And this rotor 6 has the arm part 6a made from a synthetic resin integrally molded with the permanent magnet similarly to the rotor of patent document 1, The drive pin 6b provided in the front-end | tip is provided, It is inserted into an arc-shaped long hole which is not clearly shown formed in the main ground plate 1 and penetrates to a blade chamber which will be described later. Further, the other shaft portion 2i erected on the frame plate 2 is inserted into a circular hole (not shown) formed in the main base plate 1, and its tip is penetrated to a blade chamber described later.

  Next, the configuration of the back side of the main ground plane 1 (solid-state image sensor side when incorporated in the camera) will be described. As shown in FIG. 4, at the four corners on the back side of the main ground plate 1, base portions 1f, 1g, 1h, 1i having a predetermined height from the plate surface are provided, and shaft portions 1j, 1k are provided on them. , 1m, 1n are erected. In addition to the three shaft portions 1p, 1q, and 1r standing on the plate surface of the main ground plate 1, two stoppers 1s and 1t are also provided. Furthermore, a wall portion 1 u is provided along the outer peripheral edge of the main ground plate 1 like a castle wall. A thin metal aperture plate 7 is attached in close contact with the plate surface of the main ground plate 1 having such a shape on the back side.

  Therefore, the shape of the aperture plate 7 and how to attach it to the main ground plate 1 will be described. The aperture plate 7 is formed with an opening 7a having a diameter considerably smaller than that of the opening 1a of the main base plate 1, and the opening 7a regulates the exposure opening. Therefore, even if the thickness of the main ground plate 1 is thick, by increasing the diameter of the opening 1a, it is possible to allow a part of the photographing lens to enter without contacting the main ground plate 1. The aperture plate 7 is formed with an arc-shaped long hole 7b. Although not clearly shown, a long hole having substantially the same shape as the long hole 7b is also provided at a position where the main ground plate 1 overlaps, and as shown in FIG. 4, the drive pin 6b of the actuator described above. However, it penetrates those long holes and protrudes toward the solid-state imaging device side.

  The aperture plate 7 is formed with two half-moon shaped holes 7c, 7d and four circular holes 7e, 7f, 7g, 7h. The half-moon shaped holes 7c and 7d are fitted to the stoppers 1s and 1t of the main base plate 1. The circular hole 7e is fitted into a shaft portion 2i of the frame plate 2 that protrudes through the circular hole that is not clearly shown in the main base plate 1 and protrudes to the back side. The shaft portion 2i originally has a cylindrical shape like the shaft portion 1j shown in the vicinity thereof in FIG. 4, but after the hole 7e of the aperture plate 7 is fitted. The tip is melted and deformed into a bowl shape. Therefore, the frame plate 2 and the aperture plate 7 are fixed to the main base plate 1 by this deformation, which is extremely advantageous in terms of cost.

  Further, the two holes 7f and 7g of the aperture plate 7 are fitted to the shaft portions 1p and 1q of the main ground plate 1 described above. The shaft portions 1p and 1q are also deformed into a bowl shape after the tips are heat-melted after fitting the holes 7f and 7g. Thus, in the case of a present Example, the aperture plate 7 is attached to the main ground plate 1 in three places, and one place is attached with the frame board 2 among them. However, when considering only the attachment of the aperture plate 7, a shaft portion that replaces the shaft portion 2 i of the frame plate 2 may be provided separately on the plate surface of the main ground plate 1. Moreover, if only the aperture plate 7 is attached to the main ground plate 1, it is not necessary to heat-dissolve the tip of the shaft portion at three locations as in this embodiment, and only one location may be used. In that case, in order to prevent the caliber plate 7 from being lifted from the main ground plate 1 other than the part that is heat-melted and attached, a protruding portion that protrudes toward the caliber plate 7 is formed on the auxiliary ground plate 9 described later, What is necessary is just to push in the lift by the protrusion part.

  Another circular hole 7 h formed in the aperture plate 7 is fitted to the shaft portion 1 r of the main ground plate 1. A shutter blade 8 is rotatably attached to the shaft portion 1r after the aperture plate 7 is attached. Therefore, in FIG. 4, the shape of the hole 7 b of the aperture plate 7 overlaps the shape of the hole 8 a of the shutter blade 8. Further, the shutter blade 8 is formed with a long hole 8b, into which a driving pin 6b of the actuator is fitted.

  Next, the shape of the auxiliary base plate 9 that constitutes the blade chamber between the aperture plate 7 and how to attach to the main base plate 1 will be described mainly with reference to FIG. The auxiliary base plate 9 is formed with an opening 9 a for a photographing optical path having a diameter smaller than the opening 1 a of the main base plate 1 and larger than the opening 7 a of the aperture plate 7. In addition, the auxiliary base plate 9 is formed with an arc-shaped long hole 9b. The long hole 9b is located at substantially the same position as the above-described aperture plate 7b or the long hole of the main base plate 1 which is not clearly shown. They are formed in substantially the same shape, and the tip of the drive pin 6b of the actuator is inserted.

  In addition, the auxiliary base plate 9 is formed with two half-moon shaped holes 9c, 9d, five holes 9e, 9f, 9g, 9h, 9i, and three missing portions 9j, 9k, 9m. Among them, the half-moon shaped holes 9 c and 9 d are fitted to the stoppers 1 s and 1 t of the main base plate 1 in the same manner as the holes 7 c and 7 d of the aperture plate 7. The five holes 9e, 9f, 9g, 9h, and 9i have only the hole 9f in an oval shape, and the other holes 9e, 9g, 9h, and 9i have a circular shape. Four holes 9e, 9f, 9g, 9h formed at the four corners of the base plate 9 are shaft portions 1j, 1k, 1m, 1n erected on the base portions 1f, 1g, 1h, 1i of the main base plate 1. It is made to fit in. The shaft portions 1j, 1k, 1m, and 1n are fitted into the holes 9e, 9f, 9g, and 9h, and then their tips are heat-melted and deformed into a bowl shape, whereby the auxiliary base plate 9 Is attached.

  Thus, in the case of a present Example, the auxiliary | assistant ground plane 9 is attached to the main ground plane 1 in four places, and the front-end | tip of the axial part is heat-dissolved and deform | transformed in the hook shape in any attachment part. However, the number of attachment points is not necessarily four in this way, and may be three or may be two. Further, it is not necessary to deform the tip of the shaft portion into a hook shape at all of the attachment locations. For example, when attaching at two locations, one of the shaft portions is hook-shaped with the tip of the auxiliary base plate 9 It is also possible to simply hook the hole, and after doing so, the other hole of the auxiliary ground plate 9 is fitted to the other shaft portion of the main ground plate 1 and its tip is deformed into a bowl shape. It is. Another circular hole 9 i formed in the auxiliary base plate 9 is fitted to the shaft portion 1 r of the main base plate 1 to which the shutter blade 8 is attached. However, the diameter of the hole 9 i is slightly larger than the hole 8 a of the shutter blade 8.

  Thus, in the description so far, after the front-end | tip of axial part 1p, 1q, 2i is heat-dissolved, the aperture plate 7 is fixed to the main base plate 1, and after attaching the shutter blade | wing 8 to the axis | shaft 1r after that. The holes 9e, 9f, 9g, and 9h of the auxiliary base plate 9 are fitted into the shaft portions 1j, 1k, 1m, and 1n, and then the tips of the shaft portions are thermally melted to fix the auxiliary ground plate 9. Explained in the case. If only such an attachment method is used, there is no need to form the missing portions 9j, 9k, 9m in the auxiliary base plate 9.

  Accordingly, the present invention does not necessarily require the formation of such missing portions 9j, 9k, 9m in the auxiliary base plate 9, but in the case of the present embodiment, a more suitable attachment method can be performed. Therefore, the missing portions 9j, 9k, and 9m are formed. That is, in this embodiment, first, the holes 7e, 7f, 7g, and 7h of the aperture plate 7 are fitted to the shaft portions 2i, 1p, 1q, and 1r, and then the shutter blade 8 is attached to the shaft 1r. Then, the holes 9e, 9f, 9g, 9h, 9i of the auxiliary base plate 9 are fitted into the shaft portions 1j, 1k, 1m, 1n, 1r, and finally, the shaft portions 2i, 1p, 1q, 1j, 1k, It is possible to fix the aperture plate 7 and the auxiliary base plate 9 to the main base plate 1 by thermally melting the tips of 1 m and 1 n. Therefore, the shape of the missing portions 9j, 9k, and 9m does not need to be a shape cut from the peripheral edge as in the present embodiment, and may be a hole shape.

  Further, in the case of the present embodiment, an annular wall 1 u is formed on the outer peripheral edge of the main ground plate 1. As can be seen from FIG. 2, the wall 1 u is formed such that the height from the plate surface of the main ground plate 1 is higher than the height to the hook-shaped portion. In other words, the hook-shaped portion is formed so as to be within the height of the wall portion 1u. Therefore, in the case of the shutter device of the present embodiment, the thickness dimension in the optical axis direction excluding the constituent area of the actuator depends only on the dimension from the subject-side surface of the main base plate 1 to the top surface of the wall 1u. It is like that. Therefore, compared with the structure described in Patent Document 2, the above thickness dimension can be obtained with high accuracy. And by providing such a wall part 1u, it becomes possible to also suppress entry of dust or the like into the blade chamber. Even if the wall 1u is not provided on the main base plate 1 as in the present embodiment, the thickness dimension in the optical axis direction is substantially the base portion from the subject side surface of the main base plate 1. Since it only depends on the dimension up to the receiving surface of 1f to 1i and the thickness dimension of the auxiliary base plate 9, it can be obtained with higher accuracy than the configuration described in Patent Document 2.

  Next, the operation of this embodiment will be described. FIG. 4 shows a state in which the camera is turned on but not photographed. Therefore, in this state, the subject image can be observed with the monitor, and a photographed image can be observed. Further, since it is well known, detailed description is omitted. At this time, the rotor 6 rotates clockwise in FIG. 4 by the magnetic attraction force due to the arrangement relationship between the magnetic poles of the permanent magnet and the magnetic poles of the yoke 5. It is energized to do. Therefore, a force that rotates the shutter blade 8 in the clockwise direction acts on the drive pin 6b, but this stop state is maintained by the shutter blade 8 being in contact with the stopper 1s.

  When the release button is pressed in such a state of FIG. 4, the charge accumulated in the solid-state imaging device is released by a signal from the exposure control circuit, and thereafter, accumulation of charge for photographing is newly started. . Then, when a predetermined time corresponding to the luminance of the subject elapses, a positive current is supplied to the coil 3 by a signal from the exposure control circuit, and the rotor 6 is rotated counterclockwise. Therefore, the drive pin 6b rotates the shutter blade 8 counterclockwise to close the opening 7a that restricts the exposure opening. When the shutter blade 8 completely closes the opening 7a, immediately after that, the shutter blade 8 comes into contact with the stopper 1t and is stopped.

  Immediately after the shutter blade 8 stops in this way, the imaging information photoelectrically converted by the solid-state imaging device is transferred to the storage device via the image processing circuit. When the transfer is completed, a current is supplied to the coil 3 in the reverse direction. Therefore, the rotor 6 is rotated clockwise, and the shutter blade 8 is rotated clockwise by the drive pin 6b. As a result, the shutter blade 8 opens the opening 7a, completely opens, and then stops in contact with the stopper 1s. Thereafter, when the power supply to the coil 3 is cut off, the state shown in FIG. 3 is restored.

  As described above, the present embodiment is configured as a shutter device including one shutter blade 8, and as described above, a shutter device including two shutter blades that operate in opposite directions; It is also possible to do. Further, by replacing the shutter blade 8 of the present embodiment with a diaphragm blade having an opening having a diameter smaller than that of the opening 7a, it is possible to obtain a diaphragm device. It is also possible to obtain a filter device by exchanging.

  Furthermore, this invention can also be set as the blade | wing drive device which comprised two or more apparatuses as one unit. In that case, different types of devices such as a shutter device and a diaphragm device may be unitized, and the same type of devices may be unitized. For example, a plurality of diaphragm blades having openings having different diameters may be driven by each motor, or a plurality of filter blades each having a filter plate with a different concentration may be driven by each motor. It is also possible to use a unit that can be driven by the motor, or as disclosed in Japanese Patent Application Laid-Open No. 2003-186079, the shutter blade for opening is driven by one motor and the shutter for closing is driven by the other motor. A unit that drives the blades may be used.

  And when comprised as such a unit, with respect to said main ground plate 1, the intermediate | middle board which formed the opening part for imaging | photography optical paths, and said auxiliary | assistant ground plate 9 are attached, and main ground board 1 and intermediate | middle board are attached. The first blade chamber is formed between the intermediate plate and the auxiliary base plate 9, and the second blade chamber is formed between the intermediate plate and the auxiliary base plate 9. That is, the above-mentioned caliber plate 7 is not attached to the main ground plate 1 but attached to the main ground plate 1 with a space therebetween, and is equivalent to the construction of another blade chamber between the main ground plate 1 and the caliber plate 7. It becomes a composition. Therefore, when comprised in that way, the intermediate | middle board is fixed by the axial part erected in the 1st base part of the same height as the base parts 1f-1i, and the auxiliary | assistant ground plate 9 is fixed to the base parts 1f-1i. What is necessary is just to fix with the axial part erected in the higher 2nd base part. And when comprised in that way, exposure opening is not necessarily controlled by the opening part for imaging | photography optical paths formed in the intermediate | middle board, but the opening part 1a of the main base plate 1, and the opening part of the auxiliary | assistant base plate 9 In some cases, it may be regulated by 9a.

It is a front view of the Example which showed the shutter blade fully open state (initial state). It is principal part sectional drawing of FIG. It is a rear view of FIG. It is the rear view of FIG. 1 shown in the state before attaching an auxiliary | assistant ground plane.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main ground plate 1a, 7a, 9a Opening part 1b, 1c, 1u Wall part 1d, 1e, 4a, 4b, 7c-7h, 8a, 9c-9i Hole 1f, 1g, 1h, 1i Base part 1j, 1k, 1m, 1n, 1p, 1q, 1r, 2h, 2i Shaft 1s, 1t Stopper 2 Frame plate 2a-2d Pin 2e Hook 2f, 2j Groove 3 Coil 4 Flexible printed wiring board 5 Yoke 6 Rotor 6a Arm 6b Drive pin 7 Aperture plate 7b, 8b, 9b Long hole 8 Shutter blade 9 Auxiliary ground plate 9j, 9k, 9m Missing part

Claims (5)

  At least one base portion having a predetermined height is provided on the blade chamber side surface, and at least one first shaft portion is erected, and at least one second shaft portion is also erected on the pedestal portion. A main plate made of synthetic resin, and at least one hole to be fitted to the first shaft portion, and after the hole is fitted to the first shaft portion, the tip of the first shaft portion A hole plate fitted to the main shaft and a hole to be fitted to the second shaft part by fitting the hole into the second shaft part. After that, the tip of the second shaft portion is melted into a bowl shape and attached to the main base plate, and the auxiliary base plate constituting the blade chamber between the aperture plate and the second shaft portion is disposed in the blade chamber. It is attached to the main base plate so as to be able to reciprocate and is formed in an opening formed in the aperture plate Be equipped and at least one blade is caused to advance and retreat in the exposure opening is regulated What camera blade drive device according to claim.   It has at least one first base part having a predetermined height from the blade chamber side surface and at least one second base part higher than the first base part, and the first base part has at least one A synthetic resin main base plate in which the first shaft portion is erected and at least one second shaft portion is erected in the second base portion, and at least one hole to be fitted in the first shaft portion. After the hole is fitted to the first shaft portion, the first shaft portion is attached to the main ground plate by melting the tip of the first shaft portion into a bowl shape, and the first ground portion is attached to the main ground plate. An intermediate plate constituting a blade chamber and a hole to be fitted to the second shaft portion, and after the hole is fitted to the second shaft portion, the tip of the second shaft portion is thermally melted An auxiliary base plate which is attached to the main base plate and forms a second blade chamber between the intermediate plate and the first base blade. At least being reciprocally attached to the main base plate and being advanced or retracted to an exposure opening regulated by an opening formed in any of the main base plate, the intermediate plate, and the auxiliary base plate One first blade, and at least one second blade that is disposed in the second blade chamber and is reciprocally attached to the main base plate and is advanced and retracted to the exposure opening. A blade drive device for a camera.   Even after the auxiliary ground plate is fitted to the second shaft portion in the region facing the tip of the first shaft portion, the tip of the first shaft portion is heated. 3. The blade driving device for a camera according to claim 1, further comprising a defect portion having a predetermined size so as to be melted and formed into a bowl shape.   On the opposite side of the main base plate from the blade chamber side, a synthetic resin frame plate constituting the actuator chamber of each blade is disposed between the main base plate and the first shaft portion and the first shaft portion. The at least one shaft portion of the two shaft portions is a shaft portion standing on the frame plate and penetrating through the main ground plate. Camera blade drive device.   The main base plate is annularly formed on the outer peripheral edge thereof with a wall portion having at least a height from a surface on the blade chamber side to a bowl-shaped portion formed by thermally melting the tip of the second shaft portion. The camera blade drive device according to claim 1, wherein the camera blade drive device is provided.