JP2009053433A - Device for driving blade for camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide device for driving a blade for a camera, wherein assembly work is facilitated by forming one block body where stators of a plurality of electromagnetic actuators are attached to a printed circuit board and attaching the block body to a bottom board to which a plurality of rotors are attached in advance. <P>SOLUTION: The rotors 8 and 9 equipped with output pins 8c and 9c coupled with a shutter blade and an aperture blade are rotatably attached to the bottom board 1. Stator frames 10 and 13 respectively have plate parts 10b and 10c, and 13b and 13c two by two while putting bobbin parts 10a and 13a in which the leg parts 12b and 15b of yokes 12 and 15 are inserted in between, and are attached to the flexible printed circuit board 16 in such a state that: a fall-off preventing part 10k of the stator frame 10 prevents the yoke 15 from falling off; and the a fall-off preventing part 13g of the stator frame 13 prevents the yoke 12 from falling off. The block body is attached to the attaching shafts 1c to 1F of the bottom board 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a camera blade drive device in which a plurality of electromagnetic actuators attached adjacent to a base plate reciprocate different types of blades.

  As a blade driving device for a camera, a lens shutter device, a focal plane shutter device, a diaphragm device, a filter device, a lens barrier device, and the like are known. Among them, a lens shutter device, a diaphragm device, a filter device, and a lens are known. Most barrier devices have recently reciprocated one or more blades by electromagnetic actuators. And, the reciprocating operation of the blades is mostly rotating, but in some cases, only one of them is slid, or only one of the plurality is slid and the remaining blades are rotated. What was done is also known.

  Further, in the case of a lens shutter device, a diaphragm device, and a filter device, they may not be unitized independently, and two or three of them may be configured as one unit. In fact, a plurality of electromagnetic actuators are attached to the ground plane. An example in which the lens shutter device and the diaphragm device are configured as one unit is described in Patent Document 1 as Example 5 below. Further, in the case of the configuration of the fifth embodiment, the two electromagnetic actuators are attached to the ground plane at the most distant position with the opening for the subject optical path in between. A configuration is described in which two electromagnetic actuators are mounted close to each other. Furthermore, the following Patent Document 3 describes an example of a mutual mounting configuration of a bobbin and a yoke constituting a stator of an electromagnetic actuator.

  The present invention describes a plurality of electromagnetic actuators including a stator of a type in which a bobbin portion is formed integrally with a stator frame as in Example 5 described in Patent Document 1. The present invention relates to a blade drive device for a camera that is attached close to each other with respect to the ground plane as in the configuration described above.

JP 2005-241866 A JP 2006-33914 A JP 2001-6578 A

  By the way, when two electromagnetic actuators described in Example 5 of Patent Document 1 are attached to the ground plane, the rotor and the stator are attached in order to each electromagnetic actuator, and finally, both the stators are attached. On the other hand, there is a method of attaching a printed wiring board with solder. Separately, by attaching two stators to the printed wiring board in advance, they are put into one block body, and after attaching the rotor of each electromagnetic actuator to the ground plane, the block body is attached to the ground plane. There is also a way to attach. And if the latter method is adopted, when the block body is attached to the ground plane, the soldering work has already been completed. Therefore, like the former method, when soldering, the solder is accidentally dropped on the ground plane or blades. There is an advantage that it does not. In addition, when a defect is discovered after the assembly of the device, the two stators and the printed wiring board are blocked, so that it is possible to easily remove the components of the electromagnetic actuator and perform new assembly operations. is there.

  Therefore, in the case where a plurality of electromagnetic actuators having the configuration described in Example 5 of Patent Document 1 are attached close to each other with respect to the ground plane, it is preferable that the latter method be adopted. For this purpose, when the block body is manufactured, it is necessary that one of the two leg portions provided on the yoke is inserted into the cylindrical bobbin portion formed on the stator frame. is there. However, if simply configured as such, the leg portion of the yoke comes out of the bobbin portion during handling of the block body. Moreover, even if it does not come off, if the insertion position is shifted, the assembling work to the main plate becomes troublesome. Therefore, in order to maintain the proper assembled state of the yoke, it is conceivable to adopt a configuration as described in Patent Document 3. However, when doing so, the shape of the bobbin part and the yoke becomes complicated, and when the block body is manufactured, if the leg part cannot be properly inserted and the yoke is to be replaced, the leg part is changed from the bobbin part. There is a problem that the bobbin part and the yoke are damaged even if it cannot be pulled out or is forcibly removed.

  The present invention has been made to solve such a problem, and the object of the present invention is to provide a plurality of stators on both sides of a cylindrical bobbin portion around which a coil is wound. It consists of a stator frame with two plate-like parts and a yoke with one of the two legs inserted into its bobbin part. At the time of production, these stators are attached to the printed wiring board. A blade for a camera in which a block body is attached to the ground plate after a plurality of rotors that are set in advance as a block body and each blade is reciprocated by an output pin are first attached to the ground plate. In the drive device, when the plurality of stators are configured as a block body, the insertion state of the leg portions of the yoke with respect to the bobbin portion is preferably maintained even if the bobbin portion and yoke of the stator frame are not specially shaped. Was to be, it is to provide a camera blade driving device which is inexpensive to very advantageous embodiment.

  In order to achieve the above object, a camera blade driving device according to the present invention includes a ground plate and a cover plate each having an opening for a subject optical path and constituting at least one blade chamber therebetween. A first blade and a second blade, each of which is made of at least one blade disposed in the blade chamber so as to be reciprocally movable with respect to the main plate, and has a permanent magnet, A first rotor and a second rotor, which are rotatably attached to the outer surface of the blade chamber of the main plate and each output pin is individually connected to the blade of the first blade and the blade of the second blade. And each has two plate-like portions on both sides of the cylindrical bobbin portion around which the coil is wound, and one or both surfaces of the two plate-like portions are on the printed wiring board. One of the two plate-like parts formed with a terminal pin to be fixed A first stator frame and a second stator frame forming a retaining portion on the other surface of the first and second magnetic pole portions, and a magnetic pole portion that makes the tip portions of the two leg portions face the peripheral surface of the first rotor. When one leg is inserted into the bobbin portion of the first stator frame and the two stator frames are fixed to the printed wiring board, the one leg portion is the bobbin of the first stator frame. The first yoke that is prevented from coming off from the part by the retaining part of the second stator frame and the magnetic pole part that makes the tip part of the two leg parts oppose the peripheral surface of the second rotor, and one leg When the two stator frames are fixed to the printed wiring board, the one leg portion comes out of the bobbin portion of the second stator frame. And a second yoke that is prevented by the retaining portion of the first stator frame. The first stator frame and the second stator frame are configured as one block body fixed to the printed wiring board with the first yoke and the second yoke and then attached to the base plate. To.

  In that case, as the apparatus, it is preferable that the printed wiring board is a flexible printed wiring board. However, when doing so, the two stator frames are each at least of the two plate-like portions. On the other hand, it has a thin part with a reduced thickness, and the thin parts of both are polymerized so that the thickness of the superposed part is substantially the same as the other parts of the plate-like part. If it is made to adhere to the said printed wiring board, handling of a block body at the time of manufacture becomes still easier. Further, two blade chambers are formed by dividing the base plate and the cover plate by an intermediate plate having an opening for a subject optical path, and the first blade and the second blade are provided in each blade chamber. It may be arranged separately, and in that case, the openings provided in the intermediate plate are smaller than the openings provided in the ground plate and the cover plate, The exposure opening for photographing may be regulated.

  Furthermore, the camera blade drive device of the present invention includes a third blade that is arranged in the blade chamber and is attached to the base plate so as to be able to reciprocate, and a permanent magnet. A third rotor which is rotatably attached to the surface of the main plate outside the blade chamber and connects an output pin to the blade of the third blade, and both sides of a cylindrical bobbin portion around which a coil is wound. The first stator has a terminal pin fixed to the printed wiring board on one or both surfaces of the two plate-like parts. A third stator frame disposed adjacent to one of the frame and the second stator frame, and a magnetic pole portion that makes the tip portions of the two leg portions face the peripheral surface of the third rotor; A third yoke having a leg portion inserted into the bobbin portion of the third stator frame. In addition, the stator frame adjacent to the third stator frame has a second retaining portion formed on the other surface of one of the two plate-shaped portions, and the three In a state where one stator frame is fixed to the printed wiring board and configured as one block body, the second retaining portion is configured such that one leg portion of the third yoke is the bobbin of the third stator frame. You may make it prevent coming off from the part.

  The present invention provides a camera in which a plurality of stators are attached to a printed wiring board in advance as a block body at the time of manufacture, and a plurality of rotors are attached to the ground plate, and then the block body is attached to the ground plate. In the blade driving device for a structure, in a state where the block body is configured, the leg portions of the yoke are prevented from coming off from the bobbin portion of the stator frame by a retaining portion provided on another stator frame. Therefore, handling of the block body at the time of manufacture of the device becomes extremely easy. In addition, since it is not necessary to make the bobbin portion and the yoke special, it is extremely advantageous in terms of cost. Furthermore, even if there is a problem after the block body is manufactured, the bobbin part and the yoke are not damaged at all, so that these parts can be reused.

  Embodiments of the present invention will be described with reference to the illustrated examples. The present invention can be implemented as a blade driving device in which two or three of a lens shutter device, a diaphragm device, and a filter device are configured as a single unit. This is a blade driving device in which a shutter device having blades and a diaphragm device having one blade are unitized. This embodiment is specifically designed to reduce the size and thickness of a blade drive device for a camera built in a portable information terminal device, etc., but is adopted for a single digital camera or film camera. It is also possible to do.

  FIG. 1 is a plan view seen from the subject side, and FIG. 2 is a cross-sectional view shown to facilitate understanding of the overlapping relationship of the constituent members. 3 to 5 show configurations of two electromagnetic actuators, and FIG. 3A is a plan view in which the stator blocks of the two electromagnetic actuators are removed from FIG. 3 (b) is a plan view showing the removed stator block upside down, FIG. 4 is an exploded perspective view of the stator block shown in FIG. 3 (b), and FIG. It is the top view which removed and showed only the flexible printed wiring board from 1. FIG. Further, FIGS. 6 to 9 show the configuration of each blade chamber. Among them, FIGS. 6 and 7 show the blade chamber of the diaphragm blade by removing the cover plate from the back side of FIG. FIG. 6 shows a state in which the diaphragm blades are in the initial position, and FIG. 7 shows a state in which the diaphragm blades are in the diaphragm control position. 8 and 9 are plan views showing the diaphragm blades removed from FIG. 6 and seeing through the blade chambers of the shutter blades, and FIG. 8 shows the state where the shutter blades are in the fully open position. FIG. 9 shows a state where the shutter blades are in the closed position.

  First, the configuration of this embodiment will be described. The base plate 1 is made of synthetic resin and has a relatively thick and complicated shape as can be seen from FIG. 2, and in the lower position in FIG. 1 is used for a subject optical path having a circular shape around the optical axis. The opening 1a is formed. As can be seen from FIG. 6, six mounting shafts 1 b, 1 c, 1 d, 1 e, 1 f, and 1 g are erected on the ground plate 1 on the back side of FIG. 1. Among them, the intermediate plate 2 is attached to the attachment shafts 1b and 1c, and the first blade chamber is formed between the attachment plate 1b and 1c, and the cover plate 3 is attached to the attachment shafts 1d, 1e, 1f and 1g. A second blade chamber is formed between the intermediate plate 2 and the intermediate plate 2. Then, as shown in FIG. 8, three shutter blades 4, 5, and 6 are arranged in the first blade chamber, and as shown in FIG. 6, the second blade chamber. In addition, one diaphragm blade 7 is arranged.

  Here, although the specific attachment method of the intermediate | middle board 2 and the cover board 3 with respect to the ground plate 1 is demonstrated, all the attachment methods with respect to said each attachment shaft are the same. Therefore, only how to attach the intermediate plate 2 to the attachment shaft 1b will be described as a representative. The mounting shaft 1b is initially cylindrical as shown by the two-dot chain line in FIG. After the mounting shaft 1b having such a shape is inserted into a circular hole formed in the intermediate plate 2, the intermediate plate 2 is attached to the base plate 1 by thermally melting the penetrating tip and deforming it into a flange shape. Yes. This method of attachment is generally referred to as thermal caulking, and will be referred to as thermal caulking in the following description. Because of this way of attachment, in FIG. 6, of the four attachment shafts 1d, 1e, 1f, and 1g of the cover plate 3, only the attachment shaft 1e is attached to the attachment shafts 1b and 1c of the intermediate plate 2. The other mounting shafts 1d, 1f, and 1g are shown in a cross section because the cover plate 3 is not shown at the mounting positions by them, and are formed in a flange shape by heat caulking. The site that is shown is indicated by a two-dot chain line.

  The intermediate plate 2 and the cover plate 3 are formed with openings 2a and 3a for the subject optical path that are circular with the optical axis as the center. The opening 3a is shown only in the sectional view of FIG. is there. In this embodiment, it is assumed that the photographing lens is disposed on the subject side of the ground plane 1. In order to reduce the thickness of the camera, it is desirable to make the photographic lens as close as possible to the operating surfaces of the shutter blades 4, 5, 6. Therefore, the opening 1 a of the base plate 1 is enlarged. It is. Therefore, among the three openings 1a, 2a, and 3a, the opening 2a of the intermediate plate 2 is the smallest so as to restrict the exposure opening. However, the present invention is not limited to such a configuration, and the opening 1a and the opening 3a may be minimized to restrict the exposure opening. In the case of the present embodiment, as described above, the intermediate plate 2 is provided and two blade chambers are formed between the base plate 1 and the cover plate 3, but without providing the intermediate plate 2, It is also known that one blade chamber is formed between the base plate 1 and the cover plate 3 and both shutter blades and aperture blades are arranged there. Therefore, the present invention does not necessarily include the intermediate plate 2. If the intermediate plate 2 is not provided, as described above, at least one of the opening 1a and the opening 3a regulates the exposure opening.

  In addition to the six mounting shafts 1b, 1c, 1d, 1e, 1f, and 1g, four blade mounting shafts 1h, 1i, 1j, and 1k and seven stopper shafts 1m are provided on the surface of the base plate 1 on the blade chamber side. , 1n, 1p, 1q, 1r, 1s, 1t and a positioning pin 1u. As can be seen from FIGS. 8 and 9, the blade mounting shaft 1h is configured to rotatably mount the shutter blade 4 disposed on the first base plate 1 side among the three shutter blades 4, 5, and 6. The tip is inserted into the hole 2b of the intermediate plate 2, but does not protrude into the second blade chamber in which the diaphragm blade 7 is disposed. The blade mounting shaft 1h is also inserted into arc-shaped escape holes 4a and 6a formed in the shutter blades 4 and 6 so as not to interfere with the shutter blades 4 and 6. Further, the blade mounting shaft 1i rotatably mounts the shutter blade 5 adjacent to the shutter blade 4 described above, and the tip of the blade mounting shaft 1i passes through the hole 2c of the intermediate plate 2, and the cover plate 3 is illustrated. There are no holes inserted.

  Further, the blade mounting shaft 1j rotatably mounts the shutter blade 6 disposed on the most intermediate plate 2 side, and the tip thereof penetrates the hole 2d of the intermediate plate 2 and the hole 3b of the cover plate 3 (See FIG. 2). The blade mounting shaft 1j is also inserted into a large escape hole 7a formed in the diaphragm blade 7 so as not to interfere with the diaphragm blade 7 in the second blade chamber. Further, the blade mounting shaft 1k passes through the hole 2e of the intermediate plate 2 and rotatably mounts the diaphragm blade 7 in the second blade chamber. The tip of the blade mounting shaft 1k is attached to the hole 3c of the cover plate 3 (see FIG. 2). Is inserted. The blade attachment shaft 1k also serves as a positioning pin when attaching the intermediate plate 2 to the main plate 1 together with the positioning pin 1u inserted into the hole 2f of the intermediate plate 2.

  Of the seven stopper shafts 1m, 1n, 1p, 1q, 1r, 1s, and 1t, the stopper shafts 1m, 1n, 1p, 1q, and 1r only extend to the second blade chamber. However, the stopper shafts 1s and 1t have their tips inserted into holes (not shown) provided in the cover plate 3. The stopper shaft 1p is merely inserted into the hole 2g of the intermediate plate 2, but the stopper shaft 1r is not inserted into the hole 2h of the intermediate plate 2 and does not interfere with the shutter blade 4. In order to do so, as can be seen from FIGS. 8 and 9, it is also inserted into the escape hole 4 b formed in the shutter blade 4. The diaphragm blade 7 is formed with a diaphragm aperture 7b smaller than the aperture 2a that regulates the exposure aperture.

  Next, the structure of the two electromagnetic actuators attached to the surface outside the blade chamber of the main plate 1 will be described. FIG. 3 shows the block body in which only the stators of the two electromagnetic actuators are attached to the flexible printed wiring board in a state where they are not yet attached to the ground plane 1. FIG. 3A shows the inside of the actuator chamber formed on the main plate 1 side so that the inside of the actuator chamber can be seen. FIG. 3B shows the surface that turns the block body over and becomes the actuator chamber side. This is shown so that the configuration of As shown in FIG. 3A, the ground plate 1 has two rotor mounting shafts 1A, 1B, four mounting shafts 1C, 1D, 1E, 1F, and one positioning pin 1G. It is installed. 3 (a) shows a state immediately before the block body shown in FIG. 3 (b) is attached to the main plate 1, so that the rotor mounting shafts 1A and 1B already have the rotor 8 , 9 are rotatably mounted.

  The rotors 8 and 9 of the present embodiment have the same configuration, and substantially the same configuration as the rotor described in Patent Document 2. That is, the rotors 8 and 9 of the present embodiment include cylindrical permanent magnets 8a and 9a that are magnetized in two radial directions and synthetic resin arm portions 8b and 9b that are integrated with the permanent magnets. And output pins 8c and 9c formed at the tips of the arm portions 8b and 9b. The output pin 8c of the rotor 8 is inserted into the blade chamber side from an arc-shaped long hole 1v formed in the main plate 1, and the long holes (in the first blade chamber) of the shutter blades 4, 5, 6 ( 8 and FIG. 9 but is not fitted with a sign so that the drawing is difficult to see, and the tip is a long hole 2i (FIG. 8) of the intermediate plate 2 having the same shape as the long hole 1v. 9), the above-described escape hole 7a of the diaphragm blade 7 (see FIGS. 8 and 9), and the long hole 3d (see FIG. 2) of the cover plate 3 having the same shape as the long hole 1v. Has been inserted. Further, the output pin 9c of the rotor 9 is inserted into the blade chamber side from an arc-shaped long hole 1w formed in the base plate 1, and is a long hole 2j (see FIG. 3) having the same shape as the long hole 1w. 8, see FIG. 9), and is fitted into the long hole 7c (see FIG. 6 and FIG. 7) of the diaphragm blade 7 in the second blade chamber, and the tip has the same shape as the long hole 1w. It is inserted into the long hole 3e (see FIG. 2) of the plate 3. In addition, although the rotors 8 and 9 of a present Example have such a structure, you may make it the structure described in Example 5 of patent document 1. FIG.

  Next, the structure of the block body of this embodiment and how to attach it to the main plate 1 will be described with reference to FIGS. FIG. 4 is an exploded perspective view showing the actuator chamber as viewed from the side. In addition, FIG. 5 is actually a drawing that cannot be visually observed in this way, but in order to make it easier to understand the shape of each stator on the flexible printed wiring board 16 side, FIG. It is the top view shown in the state where only board 16 was removed. In the case of this embodiment, the electromagnetic actuator that drives the shutter blades 4, 5, 6 by the rotor 8 constitutes a stator by the stator frame 10, the coil 11, and the yoke 12. In the electromagnetic actuator that drives the diaphragm blade 7 by the rotor 9, the stator frame 13, the coil 14, and the yoke 15 constitute a stator. The stators are attached to the flexible printed wiring board 16 to constitute one block body. However, the block body of the present invention may be configured by attaching these stators to a hard printed wiring board. Hereinafter, the configuration of the block body of the present embodiment will be specifically described. In the description of the stator frames 10 and 13, the flexible printed wiring board 16 side is referred to as the upper side, and the opposite side is referred to as the lower side. .

  As shown in FIG. 4, one stator frame 10 has a cylindrical bobbin portion 10a around which a coil 11 is wound, and plate-like portions 10b and 10c formed on both sides thereof. Holes 10d and 10e are formed in the plate-like portions 10b and 10c, respectively. The plate-like portion 10b is formed with a thin portion 10f having a shape obtained by scraping off a part of the lower surface, and terminal pins 10g (see FIG. 5) are erected on the upper surface. Yes. Further, the plate-like portion 10c is formed with two thin portions 10h and 10i having a shape obtained by scraping off a part of the lower surface, and the lower surface has the permanent portion of the rotor 8 described above. A recess 10j for receiving a part of the magnet 8a and the tip of the rotor mounting shaft 1A of the base plate 1 is formed, and a retaining portion 10k is provided, and a terminal pin 10m (see FIG. 5) is provided on the upper surface. Is erected. Then, both ends of the coil 11 are wound around the terminal pins 10g and 10m. Further, the yoke 12 has a hole 12a, the tip portions of the two leg portions 12b and 12c are used as magnetic pole portions facing the peripheral surface of the permanent magnet 8a of the rotor 8, and one leg portion 12b is formed as described above. Is inserted into the bobbin portion 10a.

  The other stator frame 13 has a cylindrical bobbin portion 13a around which the coil 14 is wound, and plate-like portions 13b and 13c formed on both sides thereof. In the plate-like portions 13b and 13c, Holes 13d and 13e are respectively formed. And the thin part 13f (refer FIG. 5) of the shape which scraped off a part of upper surface is formed in the plate-shaped part 13b, and the retaining part 13g is provided in the lower surface, Two terminal pins 13h and 13i (see FIG. 5) are erected on the upper surface. Further, the plate-like portion 13c is formed with a thin portion 13j (see FIG. 5) having a shape obtained by scraping off a part of the upper surface, and the permanent magnet of the rotor 9 is formed on the lower surface. A recess 13k is formed to receive a part of 9a and the tip of the rotor mounting shaft 1B of the main plate 1. The both ends of the coil 14 are wound around the terminal pins 13h and 13i. Further, the yoke 15 has a hole 15a, the tip portions of the two leg portions 15b and 15c are used as magnetic pole portions facing the peripheral surface of the permanent magnet 9a of the rotor 9, and one leg portion 15b is formed as described above. Is inserted into the bobbin portion 13a.

  In the case of the stator frame 13, the two terminal pins 13h and 13i are erected on the upper surface of the plate-like portion 13b, but one of them may be erected on the plate-like portion 13c. Both may be erected on the plate-like portion 13c. Similarly, in the case of the stator frame 10 described above, both the two terminal pins 10g and 10m may be erected on either one of the plate-like portions 10b and 10c. Further, the thin portions 13f and 13j of the stator frame 13 are superposed on the thin portions 10f and 10i of the stator frame 10 when the two stator frames 10 and 13 are configured as a block body. The thickness of these overlapping portions is substantially the same as the reference thickness of the plate-like portions 10b, 10c, 13b, and 13c.

  And the eight holes 16a, 16b, 16c, 16d, 16e, 16f, 16g, and 16h are formed in the flexible printed wiring board 16 which is the last member which comprises a block body. Of these, the four holes 16e, 16f, 16g, and 16h are holes formed in the land of the circuit pattern.

  Next, how to assemble the block body will be described. When manufacturing the block body, a jig having the same shape as that of the actuator chamber formed in the main plate 1 as shown in FIG. First, with the leg portion 15b of the yoke 15 inserted into the bobbin portion 13a of the stator frame 13, the hole 15a of the yoke 15 is fitted to the positioning pin of the jig corresponding to the positioning pin 1G, The hole 13e of the stator frame 13 is fitted to the axis of the jig corresponding to the mounting shaft 1C, and the hole 13d of the stator frame 13 is fitted to the axis of the jig corresponding to the mounting shaft 1D. Next, with the leg portion 12b of the yoke 12 inserted into the bobbin portion 10a of the stator frame 10, the hole 12a of the yoke 12 and the stator frame 10 are connected to the positioning pin of the jig corresponding to the mounting shaft 1F. And the hole 10e of the stator frame 10 is fitted to the axis of the jig corresponding to the mounting shaft 1E.

  As a result, on the jig, the two stators are arranged in a state as shown in FIG. That is, at this time, the thin portion 10f of the stator frame 10 and the thin portion 13f of the stator frame 13 are polymerized, and the thin portion 10i of the stator frame 10 and the thin portion 13j of the stator frame 13 are also polymerized. . Further, the thin portion 10 h of the stator frame 10 is in contact with the leg portion 15 c of the yoke 15. Further, similarly to the state shown in FIG. 3, the retaining portion 10 k of the stator frame 10 is substantially in contact with the leg portion 15 c of the yoke 15, and the retaining portion 13 g of the stator frame 13. Is substantially in contact with the yoke 12. Then, the four holes 16a, 16b, 16c, 16d of the flexible printed wiring board 16 are fitted to the shafts of jigs corresponding to the mounting shafts 1C, 1D, 1F, 1E, and the remaining four holes 16e, 16f, 16g, and 16h are fitted to the terminal pins 13h, 13i, 10g, and 10m. When both ends of the coils 14 and 11 wound around the terminal pins 13h, 13i, 10g, and 10m and the four lands of the printed wiring board 16 are joined with solder, the two stators and the printed wiring board 16 are connected. Is formed into one block body.

  After being manufactured in this way, the block body is removed from the jig, and the removed state is shown in FIG. At this time, the yokes 12 and 15 cannot move rightward in FIG. 3B because their forked portions are in contact with the inlets of the bobbin portions 10a and 13a of the stator frames 10 and 13. However, the leftward movement is prevented by the retaining portions 13g and 10k. Therefore, no matter how the block body is handled, the leg portions 12b and 15b of the yokes 12 and 15 do not come out of the bobbin portions 10a and 13a, and are easy to handle. In addition, in this embodiment, the thin portions 10f, 10h, 10i, 13f, and 13j are formed on a part of the stator frames 10 and 13, and the thin portions 10h are overlapped with the other thin portions, or the thin portions 10h are overlapped with the leg portions of the yoke 15. Since they are superposed on 15c, even if each stator member is attached to the flexible printed wiring board 16 having a relatively low waist, their mutual arrangement configuration does not collapse. In addition, although the stator frames 10 and 13 of a present Example have formed the thin part in both of each two plate-shaped parts, depending on a design, what is necessary is to form only in each one plate-shaped part. In some cases.

  Next, how to attach the block body to the main plate 1 will be described. In that case, the block body shown in FIG. 3 (b) is turned to the state where the block body is turned over in the left-right direction, and the rotors 8, 9 have already been moved as shown in FIG. 3 (a). It will be attached to the ground plate 1 that has been attached. In this case, the mounting shaft 1C is fitted with the hole 13e of the stator frame 13 and the hole 16a of the flexible printed wiring board 16 being overlapped, and is fixed to the mounting shaft 1D. The hole 13d of the child frame 13 and the hole 16b of the flexible printed wiring board 16 are fitted in an overlapping state, and the hole 10e of the stator frame 10 and the hole 16c of the flexible printed wiring board 16 are attached to the mounting shaft 1E. Are fitted together, and the mounting shaft 1F is fitted with the three of the hole 12a of the yoke 12, the hole 10d of the stator frame 10, and the hole 16d of the flexible printed wiring board 16 being overlapped. . At this stage, the tips of the mounting shafts 1C, 1D, 1E, and 1F protrude from the flexible printed wiring board 16, so that the block body is attached to the base plate 1 by caulking the tips. It will be attached. FIG. 1 is a view of the attachment state as seen from the subject side.

  In this embodiment, the case where the base plate 1 is directed toward the subject has been described, but it goes without saying that the cover plate 3 may be disposed toward the subject. In this embodiment, the intermediate plate 2, the cover plate 3, and the block body are all attached to the base plate 1 by thermal caulking. However, the present invention is not limited to such an attachment method, and screws You may make it attach with other fixing means. In any case, in this embodiment, the two stators are configured as a single block body together with the flexible printed wiring board. Even if the block body is removed from the ground plane 1, the block body can be removed without being damaged, and it can be assembled to another ground plane as it is, so that it can be easily reused.

  Next, the operation of the present embodiment will be described mainly with reference to FIGS. As described above, the present embodiment is a camera blade drive device built in a portable information terminal device or the like, and is a unit in which a shutter device and a diaphragm device are integrated. This is a blade driving device for a still camera. The state shown in FIGS. 6 and 8 is a photographing standby state. At this time, the aperture blade 7 is in an initial position retracted from the opening 2a, and the shutter blades 4, 5, and 6 are in the opening 2a. It is in the fully open position. For this reason, a solid-state image sensor (not shown) is exposed to subject light, and the photographer can observe the subject image on the monitor.

  At this time, the coils 11 and 14 of the electromagnetic actuators are not energized. However, as is well known, at this time, the rotors 8 and 9 not explicitly shown in FIGS. 6 and 8 are opposed to the magnetic poles of the permanent magnets 8a and 9a and the two magnetic pole portions of the yokes 12 and 15, respectively. It is biased to rotate counterclockwise depending on the arrangement relationship. Therefore, a force that rotates counterclockwise is applied to the shutter blades 4 and 5 by the output pin 8c of the rotor 8, and a force that rotates clockwise is applied to the shutter blade 6. However, since the shutter blades 4 and 5 are in contact with the stopper shaft 1m and the shutter blade 6 is in contact with the stopper shaft 1q, its rotation is prevented and the state shown in FIG. 8 is stably obtained. . Further, the output pin 9c of the rotor 9 applies a rotating force to the diaphragm blade 7 in the clockwise direction. However, since the diaphragm blade 7 is in contact with the stopper shaft 1s, its rotation is prevented, and FIG. The state shown in is stably obtained.

  When the release button is pressed at the time of shooting, it is determined based on the measurement result by the photometry device whether to shoot with the subject light dimmed or to shoot without dimming. When it is determined that the light is dimmed, first, a forward current is supplied to the coil 14. Thereby, the rotor 9 not explicitly shown in FIG. 6 is rotated in the clockwise direction, and the diaphragm blade 7 is rotated in the counterclockwise direction by the output pin 9c. Therefore, the diaphragm blade 7 enters the opening 2a. When the center of the diaphragm opening 7b reaches the center of the opening 2a, the diaphragm blade 7 comes into contact with the stopper shaft 1t and stops. This state is shown in FIG.

  Immediately after entering this state, the charge accumulated in the solid-state image sensor is released, imaging is started, and new charges are accumulated in the solid-state image sensor. When a predetermined time elapses, a forward current is supplied to the coil 11 by a signal from the exposure time control circuit. Accordingly, the rotor 8 not explicitly shown in FIG. 8 is rotated clockwise, and the shutter blades 4 and 5 are rotated clockwise by the output pin 8c, and the shutter blade 6 is rotated counterclockwise. However, the shutter blade 4 is rotated faster than the shutter blade 5. When the opening 2a is completely closed, the shutter blade 4 comes into contact with the stopper shaft 1p. Immediately after that, the shutter blades 5 and 6 also come into contact with the stopper shafts 1n and 1r. However, finally, only the shutter blade 4 comes into contact with the stopper shaft 1p, and the rotation of the shutter blades 4, 5, and 6 is stopped. This state is shown in FIG.

  In this way, when the state shown in FIGS. 7 and 9 is reached, the charge accumulated in the solid-state imaging device is transferred to the storage device as imaging information. When the transfer ends, reverse current is supplied to the coils 11 and 14, and the rotors 8 and 9 not explicitly shown in FIGS. 7 and 9 are rotated counterclockwise. Therefore, first, when the rotor 8 is rotated counterclockwise, the shutter blades 4 and 5 are rotated counterclockwise by the output pin 8c, and the shutter blade 6 is rotated clockwise. In addition, the shutter blade 4 is rotated faster than the shutter blade 5. When the opening 2a is fully opened, the shutter blades 4 and 5 come into contact with the stopper shaft 1m and stop, and the shutter blade 6 comes into contact with the stopper shaft 1q and stop.

  On the other hand, when the rotor 9 is rotated counterclockwise, the diaphragm blade 7 is rotated clockwise by the output pin 9c. Therefore, the diaphragm blades 7 are retracted from the opening 2a, and are stopped by coming into contact with the stopper shaft 1s immediately after retreating completely. Thereafter, when the energization of the coils 11 and 14 of both electromagnetic actuators is cut off, the imaging standby state of FIGS. 6 and 8 is restored. If it is determined that the image is taken without being dimmed according to the measurement result by the photometric device, the coil 14 is not energized and only the coil 11 is energized. The description of the operation is omitted. Further, when the blade driving device of this embodiment is employed in a film camera, as is well known, the diaphragm blade 7 is in the state shown in FIG. 6 and the shutter blades 4, 5, and 6 are shown in FIG. Is in the shooting standby state, and during shooting, the shutter blades 4, 5, and 6 perform the closing operation after performing the opening operation.

  The above-described embodiment is a blade driving device in which a shutter device and a diaphragm device are unitized. However, the camera blade driving device of the present invention is not limited to such a device. As is well known, if the ND filter sheet is attached to the diaphragm blade 7 of the embodiment so as to cover the opening 7b, the filter blade is one of the same light quantity control blades. Therefore, as long as the configuration of the two electromagnetic actuators is the same, the blade driving device in which the shutter device and the filter device are unitized is also the blade driving device of the present invention. From the same viewpoint, the present invention can also be configured as a blade driving device in which the diaphragm device and the filter device are unitized. Furthermore, the present invention may be a blade driving device that is a unit including a filter device in addition to the shutter device and the diaphragm device in the embodiments. In that case, one of the two stator frames 10 and 13 in the embodiment is provided with another retaining portion, and the retaining portion prevents the yoke of the electromagnetic actuator for the filter device from being detached. You can make it happen.

It is a top view of the Example seen from the to-be-photographed object side. It is sectional drawing which showed the overlapping relationship of the structural member of an Example easily. FIG. 3A is a plan view in which the stator blocks of the two electromagnetic actuators are removed from FIG. 1, and FIG. 3B is a plan view in which the removed stator blocks are turned upside down. FIG. 4 is an exploded perspective view of the stator block shown in FIG. It is the top view which removed and showed only the flexible printed wiring board from FIG. FIG. 2 is a plan view of the diaphragm blades as viewed from the rear side of FIG. 1 with the cover plate removed, showing a state where the diaphragm blades are in an initial position. FIG. 7 is a plan view viewed in the same manner as in FIG. 6 and shows a state where the diaphragm blades are in the diaphragm control position. FIG. 7 is a plan view showing the shutter blades in a perspective view with the diaphragm blades removed from FIG. 6 and showing the shutter blades in the fully open position. FIG. 9 is a plan view viewed in the same manner as in FIG. 8 and shows a state where the shutter blades are in the closed position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground plate 1a, 2a, 3a, 7b Opening part 1b-1g, 1C-1F Mounting shaft 1h-1k Blade mounting shaft 1m, 1n, 1p-1t Stopper shaft 1u, 1G Positioning pin 1v, 1w, 2i, 2j, 3d 3e, 7c Long hole 1A, 1B Rotor mounting shaft 2 Intermediate plate 2b-2h, 3b, 3c, 10d, 10e, 13d, 13e, 15a, 16a-16h Hole 3 Cover plate 4, 5, 6 Shutter blade 4a, 4b , 6a, 7a Escape hole 7 Diaphragm blade 8, 9 Rotor 8a, 9a Permanent magnet 8b, 9b Arm part 8c, 9c Output pin 10, 13 Stator frame 10a, 13a Bobbin part 10f, 10h, 10i, 13f, 13j Thin Part 10g, 10m, 13h, 13i Terminal pin 10j, 13k Recess 10k, 13g Retaining part 10b, 10c, 13b, 13c Plate-like part 11, 14 Yl 12,15 yoke 12b, 12c, 15b, 15c leg 16 printed circuit board

Claims (6)

  A ground plate and a cover plate each having an opening for a subject optical path and constituting at least one blade chamber between them, and each disposed in the blade chamber, each reciprocating with respect to the ground plate A first blade and a second blade made of at least one blade, and a permanent magnet, which is rotatably attached to a surface outside the blade chamber of the main plate. A first rotor and a second rotor individually connected to the blades of the first blade and the blades of the second blade, and two on each side of a cylindrical bobbin portion around which a coil is wound. A terminal pin fixed to a printed wiring board is formed on one or both surfaces of one of the two plate-like portions, and one of the two plate-like portions is formed. A first stator frame and a first stator frame forming a retaining portion on the other surface; The stator frame and the magnetic pole part which makes the front-end | tip part of two leg parts oppose the surrounding surface of a 1st rotor, One leg part is inserted in the said bobbin part of a 1st stator frame, and said two fixation In a state where the daughter frame is fixed to the printed wiring board, the first yoke prevents the one leg portion from coming off from the bobbin portion of the first stator frame by the retaining portion of the second stator frame. And the two leg portions are inserted into the bobbin portion of the second stator frame, with the tip portions of the two leg portions as magnetic pole portions facing the peripheral surface of the second rotor. A second yoke that prevents the one leg portion from coming off from the bobbin portion of the second stator frame by the retaining portion of the first stator frame when fixed to the printed wiring board. The first stator frame and the second stator frame are provided with a first yoke and a second yoke. With camera blade drive device, characterized in that attached to the base plate from being configured as a single block body fixed to the printed wiring board.   The camera blade driving device according to claim 1, wherein the printed wiring board is a flexible printed wiring board.   Each of the two stator frames has a thin portion with a reduced thickness on at least one of the two plate-like portions, and the thin portions of both are polymerized, and the thickness of the overlapping portion is reduced. 3. The blade driving device for a camera according to claim 2, wherein the blade driving device is fixed to the printed wiring board so as to have substantially the same thickness as other portions of the plate-like portion.   The base plate and the cover plate are separated by an intermediate plate having an opening for a subject optical path to form two blade chambers, and the first blade and the second blade are individually provided in each blade chamber. 4. The blade driving device for a camera according to claim 1, wherein the blade driving device is disposed.   5. The exposure opening for photographing is regulated, wherein the opening provided in the intermediate plate is smaller than each opening provided in the ground plate and the cover plate. The blade drive device for a camera described in 1.   A third blade comprising at least one blade disposed in the blade chamber so as to be reciprocally movable with respect to the main plate, and having a permanent magnet and rotating to a surface outside the blade chamber of the main plate A third rotor which is attached so as to connect the output pin to the blade of the third blade, and two plate-like portions on both sides of a cylindrical bobbin portion around which the coil is wound, A terminal pin fixed to the printed wiring board is formed on one or both surfaces of the two plate-like portions, and either one of the first stator frame and the second stator frame is formed. A third stator frame arranged adjacently and a magnetic pole portion with the tip portions of the two leg portions opposed to the peripheral surface of the third rotor, and one leg portion of the bobbin portion of the third stator frame A third yoke inserted into the third stator frame and adjacent to the third stator frame. The stator frame has a second retaining portion formed on the other surface of either one of the two plate-like portions, and the three stator frames are fixed to the printed wiring board. In the state configured as one block body, the second retaining portion prevents one leg portion of the third yoke from coming off from the bobbin portion of the third stator frame. The camera blade driving device according to claim 1, wherein the camera blade driving device is a camera blade driving device.

Images