JP2606220Y2 - Shutter charging mechanism - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter charging mechanism for operating a shutter control mechanism on a charging side. 2. Description of the Related Art An example of such a shutter charging mechanism is shown in FIG.
-61324). The charge mechanism of the shutter shown in FIG. 1 rotates a set lever (not shown), which engages with a locking portion 105a of the pressure lever 105, and rotates the pressure lever 105 clockwise around the shaft 105b. Move. As a result, the crimping plate 107 advances rightward in the figure, and the iron pieces 103a and 104 provided on the open-side iron piece lever 103 and the closed-side iron piece lever 104, respectively.
a, the open-side iron lever 103 and the closed-side iron lever 104 rotate around the shafts 103b and 104b, respectively, so that the open-side iron piece 116 and the closed-side iron piece 117 respectively move to the open-side electromagnet 101. And the respective iron cores 101a and 102 of the closed side electromagnet 102
a. Then, when the locking portion 108a of the release lever 108 locks the locking portion 105a of the pressure bonding lever 105, the charging operation ends. Next, in conjunction with the camera release operation, the power supply is turned on by a control circuit (not shown), and the iron cores 101 a, 1
02a is magnetized, and the iron pieces 116 and 117 are attracted to the end face. After that, the electromagnets 101 and 102 are turned on.
F, the iron cores 101a and 102a are demagnetized. At this time, since the pressing lever 105 has already been retreated to the illustrated position together with the pressing plate 107 by the release operation, the open-side iron lever 103 and the closing-side iron The lever 104 is biased by a spring (not shown), and each shaft 1
By rotating around 03b and 104b in the opposite direction to the above, the opening blade (not shown) is opened and the closing blade is closed, thereby performing the exposure operation. [0004] However, in such a conventional shutter charging mechanism, the pressure lever 105 is provided with a rotation restricting means 105a having a predetermined angle or more, and a single elasticity is provided. And the iron plate levers 103 and 104 are supported by the pressure plate 107.
Are driven, and the iron pieces 116 and 117 are moved to the electromagnets 101 and 1.
It is configured so as to approach the end faces of the iron cores 101a and 102a. In the initial stage of the start of charging, when the pressing angle of the pressure bonding plate 107 against the iron pieces 116 and 117 is large and the rotation loads of the iron piece levers 103 and 104 are different, as shown in FIG. It is difficult to approach the iron cores 101a and 102a
Iron piece 116 or 117 is iron core 101a or 10
It may be adsorbed to the end face of 2a in a slightly inclined state. When one iron piece is adsorbed on the corresponding iron core surface in such a slightly inclined state, the other iron piece is then adsorbed on the corresponding iron core surface and then further adsorbed on the one iron piece. Even if a force is applied, the inclination of the one piece of iron that is initially absorbed cannot be corrected due to the frictional force of the contact portion with the iron core surface. If the iron piece is attracted to the iron core surface in a tilted state in this way, the contact area between the iron piece and the iron core surface is reduced, and the attraction and holding force of the two electromagnets is not uniform. However, there is a problem in that the operation timing of the iron piece lever (at the time of separation from the camera) is out of order, so that an appropriate exposure operation cannot be performed, or the minimum suction voltage is increased, resulting in an increase in power consumption. Therefore, the present invention has an object to solve such a problem. [0007] In order to solve the above-mentioned problems, the present invention provides an open-side iron lever having an iron piece for controlling the opening of a shutter blade and an iron piece for controlling closing of the shutter blade. A closing-side iron piece lever, and each of the iron pieces of the open-side and closing-side iron piece levers are attracted and absorbed.
Open and closed electromagnets for release control, a crimping member that operates each iron piece of the open and closed iron strip levers in a crimping direction with respect to the open and closed electromagnets, and rotates the crimping member And a guide member that guides the crimping member so that the angle between the crimping member and each of the iron pieces is always equal when the crimping lever is actuated. It was done. According to the charging mechanism of the shutter having the above-described structure, each of the iron pieces of the open-side and close-side iron piece levers is turned by the crimping member which operates in the direction of crimping the open-side and close-side electromagnets, respectively. By providing the regulating means for regulating the movement, even if the rotation load of each of the open-side iron lever and the closing-side iron lever is different, the rotation of the crimping member is restricted, and the driving force by the crimping lever is applied to the crimping member. Since the iron piece is transmitted to the iron piece lever via the iron piece, each iron piece can be reliably brought close to each electromagnet, and each iron piece can be made close to each electromagnet without the crimping member being inclined. Further, it is possible to prevent the iron piece from being attracted to the iron core of the electromagnet while being inclined, thereby preventing the operation timing of the iron piece lever from being out of order. An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1, 2 and 3 are views for explaining an embodiment of a shutter charging mechanism according to the present invention. In the figure, reference numeral 1 denotes an open-side electromagnet, and the open-side electromagnet 1 has an iron core 2. Reference numeral 3 denotes a closing electromagnet, and the closing electromagnet 3 has an iron core 4. Reference numeral 5 denotes an open iron lever.
Is rotatable about a shaft 5a. The iron piece 6 is supported on the tip side (upper end in the figure) of the open-side iron piece lever 5 via an iron piece stem 6a. The opening-side iron piece lever 5 is always urged in a counterclockwise direction by a spring (not shown), and engages with an opening locking lever (not shown).
b. Reference numeral 7 denotes a closing-side iron piece lever, and the closing-side iron piece lever 7 is rotatable around a shaft 7a. An iron piece 8 is supported on the tip side (lower end side in the figure) of the closing-side iron piece lever 7 via an iron piece stem 8a. The closing-side iron piece lever 7 is always urged clockwise by a spring (not shown) and has an engaging portion 7b that engages with a closing locking lever (not shown). Reference numeral 9 denotes a pressure lever, which is rotatable around a shaft 9a. One end of crimp lever 9 (upper end in the figure)
, A rigid support plate 10 is rotatably supported by a stem 9b. An elastic pressure plate 11 is supported on the support plate 10 by caulking studs 12. Reference numeral 14 denotes a middle plate, which is a substrate that supports the pressure lever 9 with a shaft 9a. At one end 10a of the support plate 10, a guide pin 10b which is inserted into the groove 14a of the middle plate 14 is implanted. Middle plate 14
The groove 14a is formed in an arc shape so that the support plate 10 moves parallel to the iron cores 2 and 4. Reference numeral 13 denotes a release lever. The release lever 13 is rotatably supported around a shaft 13a, and has a locking portion 13b that locks with the locking portion 9c of the pressure lever 9. In such a shutter charging mechanism, when a set lever (not shown) is rotated, it engages with the locking portion 9c of the pressure lever 9, and the pressure lever 9
Is rotated clockwise around the shaft 9a. At the beginning of this operation, the pressure plate 11 engages with the iron piece shafts 6a, 8a supporting the iron pieces 6, 8 of the iron piece levers 5, 7, and each of the iron piece levers 5, 7 opposes a spring force (not shown). Iron pieces 6,
8 is driven to approach the iron cores 2 and 4. Open-side iron lever 5 and closed-side iron lever 7
The angle between the open-side iron lever 5 and the crimping plate 11 can be changed even when the rotation load of each of them is different.
The cover 11 and the angle always each iron 6,8 it becomes possible can equally reliably can be brought close to the electromagnets 1 and 2. When the pressing lever 9 is further rotated in the same direction, the pressing plate 11 presses the iron pieces 6, 8 against the end faces of the iron cores 2, 4 via the iron piece shafts 6a, 8a. When the pressing lever 9 is further rotated, the charging operation is completed by locking the locking portion 13b of the release lever 13 to the locking portion 9c of the pressure lever 9, as shown in FIG. In this way, the crimping plate 11 can securely press the iron pieces 6 and 8 against the iron cores 2 and 4 while absorbing the overcharge, thereby preventing the iron pieces from being attracted to the electromagnet in a state where the iron pieces are inclined. Thus, it is possible to prevent the operation timing of the iron piece lever from being out of order. As described above, since the iron pieces 6, 8 can be securely pressed against the iron cores 2, 4 without tilting, the holding force of the electromagnets 1, 3 becomes uniform, and when the iron pieces 6, 8 are released (the iron pieces 6, 8)
The operation timing of the iron levers 5 and 7 (at the time of separation from the iron cores 2 and 4 of FIG. 8) is stable even if it is repeatedly operated, so that proper exposure can always be performed. Iron pieces 6 and 8 and iron cores 2 and 4
It is possible to prevent the contact area with the electrode from being reduced, and to suppress an increase in the minimum attracting voltage, thereby preventing an increase in power consumption. When performing the exposure operation after the end of the charging operation, the release lever 13 is rotated clockwise in conjunction with the camera release operation. Then, the locking portion 13b of the release lever 13 is disengaged from the locking portion 9c of the pressure lever 9, and the pressure lever 9 is rotated counterclockwise by a spring (not shown), and the pressure plate 11 is moved to the iron piece shafts 6a, 8a. The iron pieces 6, 8 are released only from the attraction force of the electromagnets 1, 3, so that the pressure force on the iron pieces 6, 8 is released. Thereafter, when the energization to the open-side electromagnet 1 is turned off by a control circuit (not shown), the iron piece lever 5 is rotated counterclockwise by a spring (not shown), and the engaging portion 5b is moved to the open locking lever (not shown). Is rotated to start the exposure. After a lapse of a predetermined time,
When the energization of the closing electromagnet 3 is turned off by the control circuit, the iron piece lever 7 is rotated clockwise by a spring (not shown), and the engaging portion 7b rotates the closing locking lever (not shown). Exposure ends, and the state returns to the state shown in FIG. Although the guide pins 10d are planted on the support plate 10 in the above embodiment, a part of the support plate 10 may be bent. Further, in the above embodiment, the guide groove 14a is provided in the middle plate 14, but the middle plate 14 is provided on the upper plate for sandwiching the pressing members such as the pressing plate 11, the supporting plate 10 and the like. Is also good. In the above embodiment, the pressure plate 11 is made of an elastic member to absorb overcharge. However, the pressure plate 11 is made of a rigid member so that the pressure plate 11 and the pressure lever 9 can be interposed. The overcharge may be absorbed by using two components with an elastic member interposed therebetween. Further, the pressure plate 11 may be eliminated, and the support plate 10 may be formed of an elastic member to absorb overcharge. The support point 10b may be supported by a member parallel to the links 9a and 9b so as to move the support plate 10 in parallel to form a parallel link. As described above, according to the present invention, the rotation of the pressure bonding member is restricted by the restricting means even if the rotation load of each of the open-side iron lever and the closing-side iron lever is different. Since the driving force of the crimp lever is transmitted to the iron piece lever via the crimping member, each iron piece can be reliably brought close to each electromagnet, and each iron piece can be made close to each electromagnet without tilting the crimping member. Can be. In addition, since the iron piece can be prevented from being attracted to the iron core of the electromagnet while being inclined, it is possible to prevent the operation timing of the iron piece lever from being disturbed and to perform an appropriate exposure operation. Can be prevented from rising, and as a result, an increase in power consumption can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a state before charging of the present embodiment is started. FIG. 2 is a plan view showing a state during charging according to the embodiment. FIG. 3 is a plan view showing the completion of charging in the embodiment. FIG. 4 is a plan view showing a conventional shutter during charging. [Description of Signs] 1 Open-side electromagnet 3 Closed-side electromagnet 5 Open-side iron piece lever 7 Closed-side iron piece lever 6 Iron piece 8 Iron piece 9 Crimping lever 10 Support plate 10b Guide pin (restriction means) 11 Crimping plate 14 Middle plate 14a Groove

Claims (1)

(57) [Claims for Registering Utility Model] An open-side iron lever having an iron piece for controlling opening of a shutter blade, a closing-side iron lever having an iron piece for controlling closing of a shutter blade, and the open side and closing Open-side and closed-side electromagnets that control the attraction and release of each iron piece of the side iron lever, respectively, and operate each iron piece of the open-side and closed-side iron levers in the crimping direction with respect to the open-side and closed-side electromagnets, respectively. A crimping member, and a crimping lever that rotatably supports the crimping member,
And the crimp member upon actuation of the pressure lever the each iron
A charging mechanism for a shutter , comprising a guide member for guiding the pressure-bonding member so that an angle formed by the shutter is always equal .