JP2005107172A - Focal plane shutter for camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a focal plane shutter for cameras which is provided with a switch constitution allowing operation of a shutter blade to be suitably detected. <P>SOLUTION: A support plate 9 and a printed circuit board 10 are attached one over the other with a prescribed space between them. The printed circuit board 10 has two contact members 12 and 13 attached thereto, which are electrically connected to a wiring pattern of the board 10 and have flexibility and have contact parts 12C and 13c arranged between the shutter plate 1 and the support plate 9. Though contact members 12 and 13 have contact parts 12C and 13c brought into contact with or separated from each other by a push part 16b of a front blade driving member 16 and have suppression object parts 12d and 13d brought into contact with positioning means 1d and 1e provided on the shutter plate 1, dust is not brought about by repeated contact because they are not brought into contact with end faces of the print circuit board. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a focal plane shutter for a camera.

  Recent focal plane shutters for cameras have two shutter blades called front blade (group) and rear blade (group) (see Patent Document 1), and one shutter blade. The type is known (see Patent Document 2), and the former is adopted for both digital still cameras and silver halide cameras, while the latter is adopted only for digital still cameras. In any case, each shutter blade is composed of a plurality of arms pivotally attached to the main plate and one or a plurality of blades pivotally supported by these arms, and each drive member It can be operated in conjunction with the rotation of the. And at the time of imaging | photography, the start of rotation of each drive member is controlled via an electromagnet.

  In any of the above-described types, the shutter base plate has an opening for the photographing optical path substantially at the center, and the shutter base plate and the plate surface are parallel to each other in the lateral region of the opening. In addition, a support plate (also referred to as an upper plate, a mounting substrate, a ratchet plate, etc.) is attached with a predetermined space, and the drive member and the electromagnet are disposed in the space, and the electromagnet is attached to the support plate. ing. A printed wiring board is superposed on the support plate, and the coil terminal of the electromagnet is joined to the wiring pattern (see Patent Document 1). Further, a flash tuning switch operated by the rotation of the driving member is joined to the wiring pattern of the printed wiring board (see Patent Document 3), and the switch causes a malfunction of the driving member and the shutter blade. It is known that it can be used as a switch to detect (see Patent Document 4).

In addition, as described in Patent Document 3, such a switch is usually composed of two contact piece members having flexibility, and a base portion of one end thereof is formed in the above wiring pattern. A contact portion is provided in the vicinity of the free end at the other end. In a normal state, the contact piece members are brought into non-contact state by bringing the restrained portions provided in the vicinity of the free ends into contact with the separate end faces of the printed wiring board by their own elasticity. However, when one contact piece member is pushed by the rotation of the drive member at a predetermined time, both contact parts are brought into contact with each other, and the restrained part is separated from the end face of the printed wiring board. It is like that.
JP-A-9-133944 JP 2001-42386 A JP-A-8-2018877 JP 2002-55377 A

  In the focal plane shutter, in order for the above-mentioned switch to function properly, it is required that the timing for contacting the two contact portions be obtained with high accuracy and that the two contact portions are in reliable contact. That is, with respect to the former, when one contact piece member is pushed by the driving member, it is necessary to make contact with the other contact piece member at a predetermined position. The end face position of the printed wiring board with which the contact piece member is in contact with its own elasticity must be formed so that the contact piece member can be positioned with high accuracy. In the latter case, it is necessary to prevent dust from adhering between the two contact portions. To do so, the dust should not be generated in the vicinity of at least two contact piece members. There is a need.

  By the way, the above printed wiring board generally employs a hard glass epoxy copper clad laminate (also called a glass epoxy substrate) as a substrate material. The necessary wiring pattern is formed by etching or the like, and then individually punched into a predetermined shape. And each contact piece member normally uses the outer shape forming end face of the laminated plate thus punched out or the end face of the hole drilled in a predetermined shape as a positioning part, and the part to be restrained is brought into contact therewith. However, when the glass epoxy copper clad laminate is punched out as described above, it is difficult to form the end faces smoothly due to the influence of glass fibers, etc. There was a risk that dust would be generated by repeated separation, which would adhere to the contact portion of the switch and cause contact failure.

  The present invention has been made to solve such problems, and its object is to prevent the normal positioning of each contact piece member from the end face of the printed wiring board. Thus, it is to provide a focal plane shutter for a camera in which a contact failure of the switch does not occur.

  In order to achieve the above object, a focal plane shutter for a camera according to the present invention includes a shutter base plate having an opening for a photographing optical path and accommodating at least one shutter blade between the auxiliary base plate, A support plate attached to the shutter base plate with a predetermined space in a side region of the opening, and at least operating the shutter blades when being rotated in shooting and setting in the space. It consists of one driving member, a printed wiring board having a wiring pattern and the support plate being placed on the shutter base plate side, and being superposed on the support plate, and two flexible piece members Each of the contact piece members is attached with its one end in contact with the wiring pattern, and has a contact portion and a suppressed portion in the vicinity of the other end. The contact portion is brought into contact with each positioning means provided on the shutter base plate or the support plate to be pressed by the driving member at the time of photographing to bring the contact portions into contact with each other and the restrained portion is separated from each positioning means. And a switch.

  In that case, at least one electromagnet that enables rotation of the drive member at the time of photographing is attached to the support plate in the space and is electrically connected to the wiring pattern, and the drive member is At the time of shooting, if the spring is rotated as a drive source, a suitable configuration with versatility is obtained.

  According to the present invention, each contact piece member is normally positioned by the positioning means provided on the shutter base plate or the support plate instead of the end face of the hard printed wiring board as in the prior art. Even if the contact piece member abuts against the end face as shown above, dust is generated from the printed wiring board, the end face shape changes, the switch closing timing changes, or the dust adheres, resulting in poor switch contact. There is no such thing as.

  The embodiment of the present invention will be described with reference to two illustrated examples, both of which have two shutter blades (front blades) as described in Patent Documents 1, 3, and 4. , Rear blade). Since the present invention mainly relates to the configuration related to the switch, this point will be described in detail, but other shutter configurations are also well-known, so that the description will be simplified. Or omit it. Further, as described in Patent Document 4, the switch of each embodiment can detect a malfunction of the driving member connecting the shutter blades. Only the case of using as will be described. In addition, when the switch configuration of each embodiment is applied to a focal plane shutter dedicated to a digital still camera having only one shutter blade as described in Patent Document 2, the function as a flash tuning switch is Needless to say, the apparatus has only a function for detecting malfunction.

  FIG. 1 is a front view of Example 1 showing a part of the lower left when viewed from the photographic lens side when incorporated in a camera, and shows a set state of a shutter. FIG. 2 is a bottom view of the main part viewed from the lower side of FIG. 1, and FIG. 3 is a front view of the first embodiment shown in the same manner as FIG. The fully open state is shown. 4 is a front view of the second embodiment shown in the same manner as FIG. 1 and shows a set state of the shutter, and FIG. 5 is a main portion viewed from the lower side of FIG. FIG. 6 is a front view of the second embodiment shown in the same manner as FIG. 4, and shows a fully opened state of the exposure aperture.

  The shutter base plate 1 of the present embodiment is made of a synthetic resin (liquid crystal polymer) and has an opening 1a for a subject optical path at substantially the center thereof. FIG. Since only the portion is shown, only about half of the left side of the opening 1a is shown. As shown in FIG. 2, an intermediate plate 2 and an auxiliary base plate 3 are sequentially attached to the rear side of the shutter base plate 1 by a suitable means (not shown) at a predetermined interval. A blade chamber for leading blades is formed between 1 and the intermediate plate 2, and a blade chamber for rear blades is formed between the intermediate plate 2 and the auxiliary base plate 3. Further, the intermediate plate 2 and the auxiliary base plate 3 are also formed with openings having a shape similar to that of the opening 1a at substantially the center, and these three openings are arranged so as to overlap. In the embodiment, it is assumed that the shape of the opening 1a regulates the exposure opening.

  As is well known, the leading blade of this embodiment is composed of two arms 4, 5 and three blades 6, 7, 8. The arm 4 has one end at the blade of the shutter base plate 1. The arm 5 is pivotally attached to a shaft 1b (see FIG. 2) standing on the chamber side surface, and one end of the arm 5 is a shaft 1c (see FIG. 1) standing on the blade chamber side surface of the shutter base plate 1. It is pivotally attached to. The blades 6, 7, 8 are pivotally supported by both arms 4, 5 in order using a well-known connecting shaft, and are arranged on the most shutter base plate 1 side, and the arms 4, 5. The blade 8 pivotally supported on the most distal end side is used as a slit forming blade. Although not shown, the rear blade has the same configuration as the front blade, as is well known, and is pivotally attached to the shutter base plate 1 at one end of the two arms with the front blade turned upside down. ing. Since FIG. 1 shows the set state of the shutter, the three blades 6, 7, 8 of the leading blade are unfolded (minimizing mutual overlap) and cover the opening 1 a. In addition, the three blades of the rear blade are overlapped (maximum mutual overlap) and stored in a position above the opening 1a.

  In the region on the left side of the opening 1a, the support plate 9 and the printed wiring board 10 are superposed with the support plate 9 as the shutter base plate 1 side. It is installed leaving a space. In addition, two electromagnets (see Patent Document 1 or the like) arranged in a space between the support plate 9 and the shutter base plate 1 are attached by a known appropriate means and formed on the printed wiring board 10. In FIG. 1, only the arrangement state of the leading blade electromagnet 11 is shown by a two-dot chain line in these electromagnets. Is omitted. In addition, the printed wiring board 10 of a present Example consists of a hard glass epoxy copper clad laminated board.

  The flexible contact piece members 12 and 13 each have two bent portions at the base portions 12a and 13a at one end, and are positioned by bringing them into contact with the end face of the printed wiring board 10. After that, it is attached to the printed wiring board 10 by screws 14 and 15 and is electrically connected to the wiring pattern. However, as in this embodiment, the screws 14 and 15 may not be used, and they may be joined together by soldering. In the present embodiment, the printed wiring board 10 is made of a hard glass epoxy copper clad laminate, but as can be seen from the description of the configuration described later, a part of the support plate 9 is attached to two contacts. If it is made into the shape extended to the attachment position of the piece members 12 and 13, it can also be set as a flexible printed wiring board (FPC), and the same can be said also in the case of Example 2. FIG.

  The contact piece member 12 has a driven portion 12b, a contact portion 12c, and a suppressed portion 12d from the base portion 12a toward the free end portion at the other end. In FIG. 1, the restrained portion 12d is brought into contact with the positioning means 1d provided on the shutter base plate 1 by its own elasticity. Further, the contact piece member 13 has a restrained portion 13b and a contact portion 13c from the base portion 13a toward the free end portion at the other end, and these are connected between the shutter base plate 1 and the printed wiring board 10. In FIG. 1, the restrained portion 13b is brought into contact with the positioning means 1e provided on the shutter base plate 1 by its own elasticity. In the case of this embodiment, the two positioning means 1d and 1e are formed integrally with the shutter base plate 1, but they are manufactured as separate insulating members and attached to the shutter base plate 1. You can do that.

  The leading blade drive member 16 is disposed between the shutter base plate 1 and the support plate 9 and is rotatably attached to a shaft 1 f erected on the shutter base plate 1. Further, the shaft 1 f has a small-diameter portion on the tip side, and the tip of the small-diameter portion is fitted in a hole formed in the support plate 9 and the printed wiring board 10. In addition, a rear blade drive member and a set member are disposed between the shutter base plate 1 and the support plate 9, and are rotatably attached to respective shafts standing on the shutter base plate 1. However, since those configurations are well known from Patent Document 1 and the like, they are not shown.

  The leading blade driving member 16 is biased to rotate clockwise in FIG. 1 by a leading blade driving spring 17 (see FIG. 2). The drive pin 16 a provided on the leading blade drive member 16 passes through an arc-shaped long hole 1 g formed in the shutter base plate 1 and is fitted in the hole of the arm 4 in the blade chamber. Further, an iron piece member 18 that is attracted to the leading blade electromagnet 11 is attached to the leading blade drive member 16, and as shown in FIG. A pushing portion 16b for pushing the pushing portion 12b is formed.

  Further, as shown in FIG. 2, a ratchet gear 19 is also rotatably attached to the small diameter portion of the shaft 1f. The leading blade drive spring 17 is hooked on one end of the ratchet gear 19 and the other end thereof. It is hung on the leading blade drive member 16. Accordingly, when the ratchet gear 19 is rotated, the urging force of the leading blade drive spring 17 can be adjusted. After the adjustment, the ratchet gear 19 is locked by a ratchet claw (not shown) provided on the support plate 9. It has come to be. The rear blade drive member is also attached in this way together with the rear blade drive spring and the ratchet gear, but the rear blade drive member is not provided with a portion corresponding to the pushing portion 16b. .

  Next, the operation of this embodiment will be described. As already described, the switch configuration of the present invention can be applied to a camera having two shutter blades as in the present embodiment, as well as a camera having one shutter blade, In the former case, it can function as both a flash tuning switch and a malfunction detection switch. In the latter case, it can function as a malfunction detection switch. I think it is not necessary to explain all of them in order to understand. Therefore, in the case of this embodiment, only the case where the contact piece members 12 and 13 function as a flash synchronization switch will be described.

  FIG. 1 shows a shutter set state. At this time, the leading blade drive member 16 is pushed by a set member (not shown) and rotated counterclockwise against the urging force of the leading blade drive spring 17, and the iron piece member 18 is moved to the leading blade member 18. The electromagnet 11 is in contact with the iron core. Therefore, the pushing portion 16b provided in the leading blade drive member 16 is separated from the contact piece member 12, and the contact piece member 12 positions the to-be-suppressed portion 12d of the shutter base plate 1 by its own elastic force. It is in contact with the means 1d. Further, the other contact piece member 13 also brings the restrained portion 13b into contact with the positioning means 1e of the shutter base plate 1 by its own elastic force. Therefore, both the contact portions 12c and 13c are not in contact with each other, and the switch is in an OFF state.

  At this time, the three blades 6, 7, 8 of the leading blades overlap each other as a result of the arm 4 being rotated counterclockwise by the driving pin 16 a of the leading blade driving member 16. The deployment state is minimized, and covers the opening 1a of the shutter base plate 1. On the other hand, the rear blade drive member (not shown) is rotated counterclockwise against the biasing force of the rear blade drive spring by a set member (not shown) in the same manner as the leading blade drive member 16. The iron piece member is brought into contact with the iron core of the rear blade electromagnet, and the three blades of the rear blade are in a superimposed state in which the overlap between adjacent blades is maximized, and above the opening 1a. Stored in position.

  When the release button of the camera is pressed during flash photography, first, the coil of the leading blade electromagnet 11 and the coil of the trailing blade electromagnet (not shown) are energized, and the iron piece member 18 provided on the leading blade drive member 16 is energized. Is attracted to the leading blade electromagnet 11, and an iron piece member provided on the trailing blade driving member (not shown) is attracted to the trailing blade electromagnet. Immediately thereafter, the set member (not shown) moves away from the leading blade driving member 16 and the trailing blade driving member, and does not affect the clockwise rotation of the two.

  In this way, when the set member retreats from the operation locus of the leading blade drive member 16 and the operation locus of the trailing blade drive member and stops, first, the energization to the coil of the leading blade electromagnet 11 is cut off. Therefore, the leading blade driving member 16 is rotated in the clockwise direction in FIG. 1 by the biasing force of the leading blade driving spring 17. At this time, the leading blade is also actuated by the driving pin 16 a, and the three blades are driven. 6, 7 and 8 travel downward while increasing the mutual overlap, and open the opening 1a from above. Immediately before the opening 1a is fully opened, the pushing portion 16b of the leading blade drive member 16 starts to push the pushed portion 12b of the contact piece member 12, and the contact portion 12c is moved to the contact piece member 13. It is made to contact the contact part 13c. As a result, the flash is emitted immediately after the opening 1a is fully opened.

  The pushing portion 16b of the leading blade drive member 16 pushes the pushed portion 12b even after the contact portion 12c is brought into contact with the contact portion 13c. Is separated from the positioning means 1e, and the two contact piece members 12 and 13 are bent while maintaining contact of the contact portions 12c and 13c. FIG. 3 shows a state when the leading blade driving member 16 is stopped in this manner. After the flash is emitted, energization to the coil of the rear blade electromagnet (not shown) is cut off. As a result, the rear blade drive member (not shown) rotates clockwise by the urging force of the rear blade drive spring, and the three blades (not shown) travel downward. Therefore, the three blades of the rear blades close the opening 1a from above while reducing the overlap between adjacent blades. Then, when the three blades are deployed and the opening 1a is completely closed, the rotation of the rear blade drive member stops and the operation for photographing is finished.

  Thus, when the operation for photographing is completed, the above-described set member (not shown) starts the set operation, and the two drive members are counterclockwise against the urging force of the respective drive springs. , To reduce the overlap of the three blades 6, 7 and 8 of the leading blade, and to operate the blades upward while increasing the overlap of the three blades of the rear blade, The two contact piece members 12 and 13 follow the pushing portion 16b of the leading blade driving member 16 by their respective elastic forces. First, when the restrained portion 13b comes into contact with the positioning means 1e, the return operation of the contact piece member 13 is completed. Next, when the restrained portion 12d comes into contact with the positioning means 1d, the piece member 12 comes into contact. This completes the return operation.

  In the case of the present embodiment, the two positioning means 1d and 1e are integrally formed with the shutter base plate 1 made of synthetic resin. Therefore, in the returning operation of the contact piece members 12 and 13 as described above, even when the restrained portions 12d and 13b are brought into contact with each other, as in the conventional case, when being brought into contact with the end surface of the printed wiring board 10 In addition, there is no fear that dust will be generated by repeated contact. Therefore, the shape of the positioning means 1d, 1e is always kept constant, so that the positional accuracy is deteriorated and the flash emission timing is shifted, or the generated dust is attached and the flash does not emit light. There is nothing wrong. Thus, even after the return operation of the two contact piece members 12 and 13 is completed, the two drive members are set, and when the iron piece members come into contact with the respective electromagnets, the set member sets. Operation ends. The state where the set member remains in the position is the state shown in FIG.

  Next, Example 2 will be described with reference to FIGS. In the present embodiment, the positioning means 1 d and 1 e are not provided on the shutter base plate 1 as in the first embodiment. Instead, the planar shape of the support plate 9 is partially changed, and positioning means 9a and 9b are provided there. That is, in this embodiment, the support plate 9 is made of synthetic resin (liquid crystal polymer), and the positioning means 9a and 9b are formed integrally with the support plate 9. The other members and parts are the same as those in the first embodiment. Therefore, they are given the same reference numerals as in the first embodiment. Moreover, in FIG.4 and FIG.6, in order to make drawing easy to see, about the front blade, only the part which can be seen from the opening part 1a is shown. In the case of this embodiment, the positioning means 9a and 9b may be separate members and attached to the support plate 9.

  As described above, the configuration of the present embodiment is only slightly different from that of the first embodiment. Therefore, the operation is almost the same, but in the case of this embodiment, the contact members 12 and 13 are made to function as switches for flash synchronization, and will be described briefly. FIG. 4 shows the shutter set state. At this time, the leading blade drive member 16 is pushed by a set member (not shown) and rotated counterclockwise against the urging force of the leading blade drive spring 17, and the iron piece member 18 is moved to the leading blade member 18. The electromagnet 11 is in contact with the iron core. At this time, the contact piece member 12 brings the restrained portion 12d into contact with the positioning means 9a of the support plate 9 by its own elastic force, and the other contact piece member 13 also takes the restrained portion by its own elastic force. 13 b is in contact with the positioning means 9 b of the support plate 9. At this time, the three blades 6, 7, and 8 of the leading blade are in an unfolded state and cover the opening 1 a. On the other hand, the three blades of the rear blade are superposed and stored at a position above the opening 1a.

  When the release button of the camera is pressed during flash photography, first, the leading blade electromagnet 11 and the trailing blade electromagnet (not shown) are energized, and the leading blade drive member 16 and the trailing blade drive member (not shown) are turned on. , Hold them adsorbed. And, immediately after that, when the set member is in a state that does not affect the operation of those driving members, first, the energization to the coil of the leading blade electromagnet 11 is cut off. By the urging force of the leading blade drive spring 17, it is rotated in the clockwise direction in FIG. 4, whereby the three blades 6, 7, 8 of the leading blade run downward while increasing the mutual overlap, The opening 1a is opened from above. Immediately before the opening 1a is fully opened, the pushing portion 16b of the leading blade driving member 16 starts to push the pushed portion 12b of the contact member 12, and the contact portion 12c is moved to the contact portion of the contact member 13. 13c is contacted. As a result, the flash is emitted immediately after the opening 1a is fully opened.

  The pushing portion 16b of the leading blade drive member 16 pushes the pushed portion 12b even after the contact portion 12c is brought into contact with the contact portion 13c. Is separated from the positioning means 9b, and the contact piece members 12 and 13 are bent while maintaining contact of the contact portions 12c and 13c. FIG. 6 shows a state when the leading blade driving member 16 is stopped in this manner. After the flash is emitted, the energization of the coil of the rear blade electromagnet (not shown) is cut off. As a result, the rear blade drive member (not shown) is rotated clockwise by the urging force of the rear blade drive spring, and the three blades (not shown) travel downward. The blades close the opening 1a from above while reducing the overlap between adjacent blades. Then, when the three blades are deployed and the opening 1a is completely closed, the rotation of the rear blade drive member stops and the operation for photographing is finished.

  When the operation for photographing is completed, the set member (not shown) starts the set operation, and the two drive members are rotated counterclockwise against the urging force of the respective drive springs. The three blades 6, 7 and 8 and the three blades of the rear blade are actuated upward. At this time, the two contact piece members 12 and 13 are driven by the elastic force of the leading blade driving member. 16, the to-be-inhibited part 13b comes into contact with the positioning means 9b, the returning operation of the contact piece member 13 is finished, and then the to-be-inhibited part 12d is moved to the positioning means 9a. When the contact member 12 comes into contact, the return operation of the contact piece member 12 is completed.

  In this way, even if the restrained portions 12d and 13b abut on the positioning means 9a and 9b, in the present embodiment, since the positioning means 9a and 9b are made of synthetic resin, No dust is generated. Therefore, the shape of the positioning means 9a, 9b is always kept constant, the positional accuracy is suitably maintained, and the generated dust does not attach to the flash. In this way, the two drive members continue the set operation after the return operation of the contact piece members 12 and 13 is finished, and when the iron piece members come into contact with the respective electromagnets, the operation of the set member is finished. Thus, the set state shown in FIG. 4 is restored.

  In each of the above-described embodiments, only the case where the contact piece members 15 and 16 function as the flash tuning switch has been described. However, as described in Patent Document 4, the front blade remains in the same configuration. It is also possible to function as a malfunction detection switch of the drive member 16 for use. In addition, by changing the position of the switch in each embodiment or by providing another switch, it is possible to make a malfunction detection switch of the drive member for the rear blade, but in those cases, It is preferable to provide two positioning means on the support plate 9 as in the second embodiment in relation to the arrangement positions of other components. Further, when functioning as a switch for detecting such a malfunction, the present invention can be applied to a focal plane shutter having only one shutter blade.

  Furthermore, Japanese Patent Laid-Open No. 2002-162668 is provided with a switch that is opened and closed by a leading blade driving member and a switch that is opened and closed by a trailing blade driving member. Although it is described that any one of the switches can be selected, the present invention can be applied to the focal plane shutter having such a configuration. In the case of each of the above embodiments, the leading blade driving member and the trailing blade driving member are configured to be actuated by the respective driving springs at the time of photographing. The present invention can also be applied to a drive member that is operated only by a motor (actuator).

FIG. 3 is a front view of Example 1 showing a part of the lower left when viewed from the photographing lens side when incorporated in a camera, and shows a set state of the shutter. It is a bottom view of the principal part seen from the lower side of FIG. FIG. 2 is a front view of Example 1 shown in the same manner as FIG. 1 and shows a fully opened state of an exposure aperture. FIG. 5 is a front view of the second embodiment shown in the same manner as FIG. 1 and shows a set state of the shutter. It is a bottom view of the principal part seen from the lower side of FIG. FIG. 5 is a front view of Example 2 shown in the same manner as FIG. 4 and shows a fully opened state of the exposure aperture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shutter base plate 1a Opening part 1b, 1c, 1f Shaft 1d, 1e, 9a, 9b Positioning means 1g Slot 2 Intermediate plate 3 Auxiliary base plate 4, 5 Arm 6, 7, 8 Blade 9 Support plate 10 Printed wiring board 11 Leading blade Electromagnet 12, 13 Contact member 12a, 13a Base 12b Pushed portion 12c, 13c Contact portion 12d, 13b Blocked portion 14, 15 Screw 16 Lead blade drive member 16a Drive pin 16b Push portion 17 Lead blade drive Spring 18 Iron piece 19 Ratchet gear

Claims (2)

  A shutter base plate having an opening for a photographing optical path and accommodating at least one shutter blade between the auxiliary base plate, and a predetermined space in the lateral region of the opening to be attached to the shutter base plate A support plate disposed in the space, at least one drive member that operates the shutter blades when rotated during photographing and setting, and a wiring pattern, and the support plate is disposed on the shutter. It consists of a printed wiring board superposed on the support plate on the base plate side, and two flexible piece members, and these piece members are attached with their respective ends in contact with the wiring pattern. In addition, a contact portion and a restrained portion are provided in the vicinity of the other end, and the restrained portion is normally brought into contact with each positioning means provided on the shutter base plate or the support plate. Camera focal plane shutter, characterized in that it comprises a, a switch 該被 inhibiting section is separated from each of said positioning means with contacting the pressed said contact portion between said drive member at the time of shooting allowed.   At least one electromagnet that enables rotation of the drive member during photographing is attached to the support plate in the space and is electrically connected to the wiring pattern. The focal plane shutter for a camera according to claim 1, wherein the focal plane shutter is rotated by a spring as a driving source.