JPH0690382B2 - Shutter device - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a vertically running focal plane shutter device.

(Background of the Invention) Japanese Patent Laid-Open No. 58-1186 discloses a shutter with a built-in balancer.
As shown in Fig. 27, since the first locking key and the balancer locking key are released almost at the same time, it takes a lot of time and effort to adjust during assembly, which may increase the cost of the device. .

In addition, since the first locking key and the balancer locking key are released almost at the same time, the movement of the balancer locking key may change due to environmental changes such as temperature, and the balancer locking key may move earlier than the first locking key. When released, the balancer stops while the shutter is open, and the impact when the balancer is stopped may adversely affect the photograph.

Further, the operation of releasing the balancer locking key may affect the operation of releasing the first locking key.

(Object of the invention) The present invention solves these drawbacks and sets the release timing of the leading blade locking lever earlier than the release timing of the balancer locking lever, so that the balancer stops during shutter opening. The objective is to obtain a shutter in which the impact at the time of stop does not adversely affect the photograph. Another object of the present invention is to obtain a shutter that does not require adjustment during assembly. Further, it is an object to obtain a shutter in which the operation of releasing the balancer locking key does not affect the operation of releasing the first locking key.

(Outline of the Invention) The leading blade armature lever flicks out the leading locking lever,
After the engagement of the front locking lever is completely disengaged, the armature lever flicks the balancer locking lever. That is, the technical point is that a clear time difference is provided between the breakage of the first locking lever and the breakage of the balancer locking lever.

(Embodiment) FIGS. 1 to 9 show a longitudinally running shutter device according to an embodiment of the present invention, all of which show a state before shutter release. The motor 1 is fixed to the camera body. Gear 2
Is fixed to the shaft 1 and engages with the transmission gear 5. The shaft 3 is rotatably attached to the camera body. Further, are there gears 4 and 6 that can be integrally rotated by the rotation of the gear 5 on the shaft 3? The gear 4 and the gear 8 are in mesh, and the gear 8 and the gear 7 are integrally connected by the shaft 9. Has been done. The substrate 19 is fixed to the camera body at a position not shown. The shaft 9 is rotatably supported on the substrate 19.

FIG. 2 is a view seen from the direction B in FIG. Axis 14 is the substrate
It is fixed on 19 and has cams 11, 12 and gear 1 on this shaft.
0 is rotatably mounted. Further cams 11 and 12
Are joined together by pins 13. The gear 10 meshes with the gear 7 and is planted with a pin 10a. Pin 10a is a cam
The stepped portion 11a of 11 can be contacted. Lever 15 is substrate 1
It is rotatably supported by a shaft 46 fixed to 9, and is further urged counterclockwise by a spring 47. A pin 17 is planted on the lever 15 and a roller 16
Is rotatably supported. Therefore, the roller 16 has a spring 47.
Is pressed against the cam surface 12a of the cam 12. The other end bent portion 15a of the lever 15 is rotatably connected to the shutter charge lever 20 by a pin 18.

Returning to FIG. 1, the gear 22 that engages with the gear 6 rotates the worm 26 via the gear 24. The gear 26 is supported by the shaft 25. Where gears 22 and 24, worm 26
Both shafts 23 and 25 are rotatably supported by the camera body at positions not shown. The rotation of the worm 26 is redirected at a right angle by the worm wheel 27 and transmitted to the gear 29. A pin 30 is planted on the gear 29. The shaft 28 integrally connects the gears 27 and 29 and is rotatably supported by the mirror box substrate 41.

FIG. 3 is a view seen from the direction A in FIG. Third
In the figure, the shaft 34 is fixed to 41, the gear 31, the cam 32
Is rotatably supported. The gear 31 is in mesh with the gear 29, and the gear 31 and the cam 32 are integrally connected by a pin 33. Furthermore, a pin 31a is planted on the lower surface of the gear 31. The shaft 38 is fixed to the substrate 41 and rotatably supports the lever 35. The lever 35 has arms 35b and 35c,
A pin 37 is implanted in the arm 35b, and the roller 36 is rotatably attached by the pin 37. The other end is a sector gear 35a. Further, since the lever 35 is biased clockwise by the spring 48, the roller 36 is pressed against the cam surface 32a of the cam 32. The shaft 40 is fixed to the substrate 41 and rotatably supports the sector gear 39. The gear 39 meshes with the gear 35a, and a claw 39a projects toward the shutter substrate 21 at the lower end. The shaft 45 is fixed to the substrate 41 and rotatably supports the levers 42 and 43. Lever 42
A pin 42a is fixedly provided on the upper portion, and the pin 42a is pressed against the lever 43 by the clockwise biasing force of the spring 50. Further, the lever 42 is provided with a counterclockwise urging force of a spring 49, and the urging force of the spring causes the lever 43 to be pressed against the pin 51. Here, the pins 51 are planted on the substrate 41. The substrate 41 is provided with an arc hole 41a, and the pin 44 projects through the hole. This pin is connected to the mirror and is located within the rotation path of the lever 43. The shafts 200 and 204 rotatably support levers 201 and 205, respectively, and are fixedly mounted on the substrate 41. Lever 201
Is biased counterclockwise by a spring 202. However, this rotation is limited because one arm 201a of the lever 201 is in contact with the pin 31a. The lever 205 is biased counterclockwise by a spring 206, but its rotation is also limited by a pin 207 fixed to the substrate 41. Further, at this position, the one end 205a is positioned within the rotation locus of the pin 31a. The pin 203 is fixed to the substrate 41 and has a pin 31a and an arm 201a.
This is the rotation limitation of the lever 201 when the contact of is released.

Returning to FIG. 1 again, the details of the portion C indicated by the alternate long and two short dashes line are drawn in FIGS. Section C is the drive and restriction part of the planting. In FIG. 4, the shafts 52 to 65 are fixed to the implantation board 21. The lever 20 is rotatably mounted on a shaft 52, and a roller 20c is rotatably mounted on the lever by a pin 20b. The charge cam 66 is rotatably supported on a shaft 58 and is biased counterclockwise by a spring 67. One end of the spring is hooked on the cam 66 and the other end is hooked on a pin 68 fixedly mounted on the substrate 21. The arm 66a of the cam 66 pushes the roller 20c by the biasing force of this spring, so that the lever 20 receives the biasing force in the clockwise direction. As a result, the side surface 20a of the lever 20 abuts the shaft 53, and the lever 20 is positioned at this position. Both the trailing blade return lever 69 and the trailing blade drive lever 71 are rotatably supported by the shaft 57. A spring 74 is hung on both levers, and this spring urges the lever 69 in the counterclockwise direction and the lever 71 in the clockwise direction. A pin 70 is planted in the lever 69 and penetrates an arc hole 21b formed in the substrate 21 to engage with the shutter rear blade group.

FIG. 6 shows the state in which the rear blade group is composed of slit forming blades 76 and light shielding blades 77, 78, 79, 80, and is rotatably attached to the driving arm 81 and the driven arm 82 by the pin 131. The arms 81 and 82 are the substrate 21.
It is mounted rotatably around shafts 83, 84 fixed to the back surface of the. The rear blade group is allowed to perform a well-known parallel link motion by the above-mentioned configuration. The pin 70 is engaged by fitting into a hole 81a provided in the arm 81. Further, when the pin 70 is in the position shown in FIG. 4, the rear blade group does not completely cover the aperture 21a, and the lower side of the aperture remains open as shown in FIG.

Returning to FIG. 4, the return lever 69 tries to rotate in the counterclockwise direction by the urging force of the spring 74, but since the tip portions 87a of the lever 87 and the engaging portions 69a of 69 are engaged, Movement is regulated. The lever 87 is rotatable about an axis 59 and is biased clockwise by a spring 88. Pins 72 and 89 are planted on the upper surface of the lever 71.
A charge roller 90 is rotatably supported on the top.
A pin 73 is planted on the lower surface of the lever 71 so that it can come into contact with the side surface 69b of the lever 69. Further, the lever 71 is biased clockwise by the action of the spring 85. This biasing force is restricted because the protruding end 71a of the lever 71 is engaged with the bent portion 91a of the trailing blade locking lever 91. Both the levers 91 and 92 are rotatably supported by the shaft 56, and the lever 91 is biased clockwise by the spring 93 and the lever 92 is biased counterclockwise by the biasing force of the spring 94. The biasing force of the spring 93 is restricted by the bent portion 91c of the lever 91 coming into contact with the substrate 21, and the biasing force of the spring 94 is controlled by the lever 94.
The bent portion 92a of 92 is regulated by coming into contact with the protrusion 71b of the lever 71. A rear brake lever 96 is rotatably supported by a pin 64. lever
A disc spring 97 is arranged between the 96 and the substrate 21, and the screw 98
97 is deformed through the washer 100 by tightening
The lever 96 has a structure in which a friction torque is generated.

FIG. 7 is a sectional view taken along the line D-D. Lever 96 arm 96
The position a is located within the rotation trajectory of the pin 70, and the brake is applied by the 70 pushing the arm 96a near the end of the trailing blade travel.
The position where the brake of the lever 96 ends the operation is determined at the position where the other arm 96a comes into contact with the stopper rubber 99. This rubber 99 is attached to the shaft 55.

101 is a leading blade drive lever, which is rotatable about an axis 61. A pin 102 and a shaft 103 are planted on the upper surface of the lever 101, and a charge roller 104 is rotatably attached to the shaft 103. Further, a leading blade drive pin 105 is planted on the lower surface thereof. Further, the lever 101 is biased clockwise by the spring 106. The protrusion 101a is locked to the bent portion 108a of the tip key 108 so as to resist the biasing force. The key 108 is rotatable about the axis 60,
And, it is biased clockwise by the spring 109. The key is positioned by abutting the side surfaces 21d and 108a of the hole 21c provided in the substrate 21. 110 is a leading blade brake lever, which is rotatably supported around the shaft 65, and like the trailing blade brake, by tightening a screw 112, the disc spring 111 is deformed via a washer 113.
Generates friction torque. Reference numeral 114 denotes an X-contact actuating lever rotatable about a shaft 65, and a pin 115 implanted on the lever 110 and a groove 114a thereof are fitted to each other. Therefore, the lever 114 and the lever 110 move together. 63 is a hin planted on the substrate 21, and a stopper rubber 116 is fitted on the outer periphery thereof. A leading blade balancer lever 117 is rotatably supported around the shaft 62.
118 is a leading blade balancer weight, which is integrally connected to 118 by a pin 119. The other end of balancer weight 118 is shown in FIG. In FIG. 1, 121 and 123 are pins implanted on the substrate 21, and a lever 120 is rotatably supported on the pins 121. The pin 122 is planted on the lever 120, and the lever 124 is urged in the clockwise direction by the spring 124 hooked on this pin. Furthermore, the pin 122 is a weight
It is fitted with an elongated hole 118a provided in 118.

In FIG. 4, the pin 105 penetrates the circular arc hole 21e of the substrate 21 and engages with the front blade group. FIG. 8 shows this state, and 105 is fitted in the elongated hole 125a of the front drive arm 125. The driven arm 126 and the pre-driving arm 125 are rotatably supported around pins 132 and 133 that are planted on the back surface of the substrate 21, and the pins 131 provided thereon support the slit forming blade 1.
27 and shading blades 128 to 130 are rotatably supported. The leading blade group is configured to perform parallel link motion like the trailing blade group. In the state shown in FIG. 4, the front blade group completely shields the aperture 21a. Therefore, the fourth
In the state shown in the figure, the aperture 21a is doubly shielded by the front and rear blade groups except for the lower part thereof. Here, the double shading state is obtained by the rear blade group in the state shown in FIG. 6 and the front blade group in the state shown in FIG. 8, and the slit edge 76a of the rear blade slit 76 overlaps the front blades 129 and 130. It has not returned to part 129a.

FIG. 5 is an explanatory view of the members arranged in the upper part of FIG. 4, and the same members as those in FIG. 4 are denoted by the same reference numerals.
Reference numeral 134 denotes an upper substrate supported by the shafts 53 and 56, and the rear blade start signal contact piece 136 is supported by a pin 137 via an insulating plate 135. Upward bent portion 92b of lever 92
The contact piece 136 can come into contact with the contact piece 136. Reference numeral 138 denotes an upper substrate supported by three axes of 54, 59 and 62, and the shafts 139 and 14 are provided above the upper substrate.
0 is fixed. The shaft 140 has a balancer locking lever 141
Is rotatably supported and is urged counterclockwise by a spring 142. Reference numeral 143 is a magnet substrate supported by shafts 62, 139 and 140 and located above the substrate 138. The pins 144 to 150 are planted on the upper surface of the substrate 143, and the pins 151 and 152 are planted on the back side. Reference numeral 153 is a leading blade release magnet, which is fixed to the substrate 143 by a pin 146 and a screw 155. A trailing blade release magnet 154 is fixed on the substrate 143 by a pin 145 and a screw 156. Armature charge input lever 15
7 and the balance-charge lever 158 are rotatably supported on the shaft 151. The pin 159 is planted on the lever 158, and a spring 160 is hooked on the pin 159 and the lever 157. The spring urges the lever 157 and the lever 158 in opposite directions. The armature charge lever 161 is rotatably supported around the shaft 152,
Further, it is biased counterclockwise by the spring 162. In the state shown in FIG. 5, the downward protruding pin 161a of the lever 161 is the lever 87.
It abuts the bent portion 87b of the lever 87 and restricts the clockwise rotation of the lever 87 by the spring 88. Also, one end 161 of the lever 161
Since b is in contact with the side surface 163c of the tip armature lever 163, it restricts the movement of the armature lever 163, and the other end 161c
Regulates the movement of the rear armature lever 164. Further, the arc portion 161d is in contact with the side surface 158a of the lever 158. Therefore, the lever 161 is restricted from moving counterclockwise by the urging force of the spring 162. The lever 163 is rotatably supported on the shaft 148 and is biased clockwise by the action of the spring 165. The lever 164 is rotatably supported on the shaft 149 and is biased clockwise by the action of the spring 166. A switch 168 is fixed to the bent portion 143a of the substrate 143 with a screw 167. Switch 168 is a contact piece 168a, 1
68b and 168c are provided, 168a is a photometric circuit switch, and 168c is an X contact. In the state shown in Fig. 5, the photometry circuit switch is ON, X
The contact is Off. The levers 250 and 251 are rotatably mounted around 150, and the lever 250 is biased counterclockwise by a spring 254. A pin 253 is planted on the upper surface of the lever 250, and the pin abuts the armature lever 164. On the other hand, a pin 252 is planted on the upper surface of the lever 251. This pin is the groove 250a of the lever 250.
It is fitted with. Further, the arc portion 251a of the lever 251 is in contact with the arm 163d of the armature lever 163. It should be noted that the portion 252a where the pin 252 is planted in the lever 251 is a fitting portion 25 with which the groove 250a is fitted.
Since the center does not coincide with 2b, the relative positional relationship between the pins 235 and 251a can be adjusted by rotating this pin. The lever 169 is rotatably supported around 53 and is biased clockwise by a spring 169b. This rotation is restricted by the pin 169a planted on the lever 169 contacting the substrate 134.

The above is the schematic configuration of the present embodiment, and the operation will be described below. As described above, FIGS. 1 to 8 all show the state before the shutter release. To briefly describe the operation, in one shooting operation of the camera, the pin 10a shown in the second illustration and the pin 30 shown in the third illustration first rotate counterclockwise by 180 °, and once stop, the shutter blades are exposed. I do. Next, the pins 10a, 30 rotate clockwise by 180 ° and return to the original position, but the rotation does not stop, and further rotates by 360 ° and returns to the position shown. In this way, one shooting operation is completed. This operation will be described below. When the shutter release button (not shown) is pressed in the state shown in FIGS. 1 to 8, the motor 1 rotates clockwise in FIG. This rotation is transmitted to the gear 10 via the illustrated gear train. Gear 10 rotates counterclockwise. At this time, since the pin 10a is away from the pin 11a, the cams 11, 12 and the lever 15 do not move, therefore. The charge lever 20 also remains inactive. In addition, the gear train of another system is rotated by the rotation of the motor in FIG.
The rotation is transmitted to the gear 29 via 4,26,27. Third
In the figure, the rotation of the gear 29 is counterclockwise,
The upper pin 30 abuts the side surface 42b of the lever 42, and the lever 4
Rotate 2 clockwise against spring 49. Since the lever 43 is pushed by the pin 42a and also rotates clockwise, when the side surface 43a of the lever 43 comes into contact with the pin 44, the lever 43 is pushed leftward. Since the pin 44 is interlocked with a mirror (not shown), the mirror is retracted out of the photographing optical path. In addition, the rotation of the gear 29 is
It is transmitted to the cam 32 via 31. At this time, since the cam 32 rotates clockwise, the roller 36 rolls along the cam surface 32a, and the action of the spring 48 causes the lever 35 to rotate clockwise. At this time, since the gears 35a and 39b are meshed with each other, the gear 39 rotates counterclockwise. In FIG. 5, the movement of the pawl 39 is downward and retracts to the position of 39a 'shown by the chain double-dashed line. On the other hand, since the pin 31a also rotates clockwise, the lever 201 rotates counterclockwise by the action of the spring 202. Then, it stops at the position where the bent portion 201b comes into contact with the bent portion 205c. In FIG. 5, lever 157
Since the claw 39a that regulates the lever retracts in the direction indicated by the chain double-dashed line, the lever 158 also retracts, and the lever 161 rotates counterclockwise by the biasing force of the spring 162. 16 by this rotation
The contact between 3 and 161b and 164 and 161c is released. However, after pressing the shutter button, the electric current is supplied to 153 and 154 and the iron pieces 163a and 164a are adsorbed and held until the rotation of the lever 161 starts. Further, since the circular arc portion 161d pushes the lever side surface 158a, the 157 and 158 integrally rotate in the clockwise direction.
At this time, the arm 158b of the lever 158 and the balancer lever 117 are separated from each other, and the balancer lever 117 is locked by the key 141a of the locking lever 141.
Locked in. Moreover, since the pin 161a pushes the bent portion 87b to the left, as shown in FIG.
87 rotates counterclockwise against spring 88. At this time, the engagement between the locking portion 69a and the tip 87a of the return locking lever is released, the return lever 69 is rotated counterclockwise by the action of the spring 74, and the side surface 69b comes into contact with the pin 73 and stops. . Along with this, the rear blade group retracts to the outside of the aperture and reaches the rear blade start position. Here, the motor stops. At this time, in FIG. 2, the pin 10a is in a position rotated 180 ° counterclockwise from the position shown, and in FIG. 3, the pin 30 is counterclockwise and the pin 31a is clockwise 180 ° from the position shown. It is in a rotated position.

Next, when the magnet 153 is de-energized, the armature lever 163 is rotated in the clockwise direction by the action of the spring 165, and the arm 163b knocks off the bent portion 108b of the leading blade locking lever 108. As shown, the bent portion 108a and the locking portion 101a of the front drive lever 101 are disengaged. Then, the leading drive lever 101 is rotated clockwise by the action of the spring 106, and the leading blade moves downward to open the aperture. Also, since the arm 163d rotates clockwise, the side surface 251a
The contact with is released. Lever 250, lever 251 is spring 254
By the action of, it rotates in the counterclockwise direction as a unit. Since the pin 253 on the lever 250 is within the rotation locus of the armature lever 164, even if the armature lever 164 travels relatively fast with respect to the armature lever 163, it is limited to the pin 253. As a result, a certain time difference is always provided between the armature lever 163 and the armature lever 164, and the leading blade and the trailing blade are prevented from running while overlapping each other. Meanwhile, returning to FIG. 5, the arm
163b continues to rotate further, and after releasing the engagement between the locking portion 101a and the bent portion 108a, the protrusion 141b of the balancer locking lever 141 is blown out. This allows the balancer locking lever
141 rotates clockwise against the spring 142 to release the engagement between the key 141a and the balancer lever 117. Then the balancer weight 118
Starts to move upward due to the action of the spring 124 (Fig. 1). As a result, the balancer 118 moves upward and balances with respect to the downward movement (shutter opening movement) of the front blade group from FIG. Here, the balancer lever 141
To release the lock of the leading blade balancer lever 117 by
It is configured to be performed after the locking of the leading blade drive lever 101 by 08 is completely released. The pin 105 hits the side surface 110a of the brake lever 110 and pushes the side surface 110a near the end of traveling of the front blade group. Brake lever 110 is rotated clockwise about axis 65 to brake pin 105 by the frictional force provided by disc spring 111. At this time, the X-contact operation cover 114 also integrally rotates in the clockwise direction. This movement causes the bent portion 114b of the x-point actuating lever 114 to move downward in FIG. 5, so that the contact piece 168b renders the photometric circuit switch 168ba nonconductive by its own spring force, and the X contact 168c. Is conducted.

When the predetermined exposure time elapses, the magnet 154 is de-energized, and the armature lever 164 is rotated clockwise by the action of the spring 166. Then, the arm 164b blows off the bent portion 91b. As a result, the rear blade locking lever shown in FIG.
91 rotates counterclockwise against the spring 93 and bends 91
The engagement between a and the locking portion 71a is released. Then the rear drive lever 71
Is rotated clockwise by the action of the spring 85. At this time, the return lever 69 is also pushed by the pin 73 and rotates in the same direction, so that the rear blade group runs. The rotation of the rear drive lever 71 causes the lever 71b to move to the right, so that the lever 92 is rotated counterclockwise by the action of the spring 94. Then, the bent portion 92b and the contact piece 136 come into contact with each other, and a rear blade start signal is output. Pin 70 is the side of the rear brake when the rear blades have completed running.
By abutting against 96b and pushing it, the brake is applied in the same manner as the front blade group. When the trailing blade group has completed traveling, the motor starts rotating counterclockwise in FIG. At this time, the gear train system shown in FIG. 2 does not start charging until 180 ° until the pin 10a contacts the cam side surface 11a (until it returns to the position shown in the drawing). On the other hand, the rotation of the motor rotates the gear 29 via the gear 27, but since the rotation direction of the motor is opposite to the above-mentioned direction, the lever 43 moves counterclockwise in FIG. The pin 44 is rotated and thereby the pin 44 is also returned to the original position (the position shown in FIG. 3), so that the mirror returns to the observation position. The claw 39a moves upward from the position indicated by the chain double-dashed line in FIG. Then, the lever 157 is pushed by the claw 39a and rotates counterclockwise. The lever 158 moves by the action of the spring 160.
Rotates together with. As a result, the arm 158b pushes the balancer lever 117 to the right, and the balancer 118 is charged.
That is, it returns to the position shown in FIG. Further, since the lever side surface 158a pushes the circular arc portion 161ad, the lever 161 rotates clockwise against the spring 162. At this time, since the arc 161b pushes the arm 163c and the arc 161c pushes the rear armature lever 164, the armature levers 163, 164 are charged against the springs 165, 166. Further, since the pin 161a moves rightward in FIG. 4, the lever 87 rotates clockwise by the action of the spring 88, and the tip 87a of the return locking lever returns to the position where the locking portion 69a can be locked. At this time, the pins 10a, 30, 31a in FIGS. 2 and 3 are returned to the positions shown in the drawing, but the motor continues to rotate for film winding and shutter charging. In FIG. 2, the pin 10a pushes the cam side surface 11a and rotates it in the clockwise direction, so that the cam 12 integrated with the cam 11 also rotates in the same direction. This causes lever 15 to rotate clockwise against spring 47, charging lever 20 to the left. As seen in FIG. 4, the lever 20 rotates counterclockwise about the shaft 52, so that the roller 20c rotates the cam 66 clockwise against the spring 67. This rotation causes the cam surface 66b to push the roller 104, which causes the drive lever to move forward.
101 rotates counterclockwise against the spring 106, and the locking portion 101a
Is charged up to the position where it gets over the bent portion 108a. As a result, the front blade group shields the front surface of the aperture from light. Since the lever pin 105 pushes the side surface 110b of the brake lever 110, the brake lever 110 rotates counterclockwise and the front brake is reset.

On the other hand, since the roller 90 is pushed by the arm 66c, the lever 7
1 is charged counterclockwise against spring 85. At the beginning of this charge, the lever 69 also rotates integrally with the action of the spring 74, but when the pin 70 reaches a position where it does not hinder the resetting of the rear brake, the locking portion 69a contacts the tip 87a, and at that position the return lever The rotation of 69 is restricted, and thereafter only the rear drive lever 71 continues to be charged in the counterclockwise direction, and the charging ends at the position where the locking portion 71a has passed over the bent portion 91a. Therefore, the trailing blades, which are fitted with the pins 70, still keep the light-shielded state except for the lower part of the aperture. Therefore, the rear brake reset cannot be done at pin 70 as it was at the front brake reset at pin 105. The rear brake is reset by the pin 66d planted on the lower surface of the cam 66 pushing the arm 96c and the rear brake lever 96 rotating clockwise. By the way, second
When the pin 10a in the figure pushes the pin 11a, the pin 30 in FIG. 3 rotates clockwise and 31a rotates counterclockwise, so that the pin 30 abuts against the side surface 42c and pushes it. The lever 42 rotates counterclockwise while charging the spring 50. But the lever
Since 43 abuts pin 51 and does not move, pin 44 is also inoperative and the mirror does not move. Eventually, when the pin 30 passes by, the biasing force of the spring 50 is stronger than that of the spring 49, so the lever 42
Returns to the position shown. On the other hand, since the contact between the arm 210a and the pin 31a is separated again by the counterclockwise rotation of the pin 31a,
The bent portion 201b contacts the bent portion 205c. Laura 36
The pin 31a pushes the arm 205a before the lever falls to the step 32a of the cam 32, and the lever 205 rotates clockwise against the spring 206.
Then, the bent portion that has been in contact with the bent portion 205c until now
201b is engaged with the side surface 205d, the pin 31a is further rotated counterclockwise, and even if the contact with the arm 205a is released, the lever 205 is locked by the bent portion 201b and remains rotated clockwise. Eventually, the roller 36 falls to the step portion 32a, and the lever 35 tries to rotate clockwise by the spring 48, but the lever 205
Since the bent portion 205b of the is positioned within the rotation locus of 35c, the lever 35 is locked. Therefore, the claw 39a does not move and holds the lever 157 shown in FIG. 5 in the locked state. When the pins 10a and 30 in FIG. 2 and FIG. 3 rotate clockwise and the pin 31a rotates counterclockwise and returns to the positions shown in the drawings, the states shown in FIGS. When the shutter dial (not shown) is set to the T position, the lever 169 rotates counterclockwise against the spring 169b, and the key portion 169c thereof engages with the arm 164c. When the shutter button (not shown) is released in this state, the leading blade group operates as described above, but since the arm 164c is locked to the key portion 169c as described above, the rear armature 154 is not energized. Even if cut, the 164 cannot rotate, so the rear blade group does not run. When the shutter dial is moved to a position other than T after a predetermined time, the lever 169 is rotated clockwise by the action of the spring 169bb, whereby the rear armature 164 is rotated clockwise by the action of the spring 166. As a result, the trailing blade group runs, and thereafter, the same operation as that described above terminates one photographing operation.

In this embodiment, the member for releasing the locking of the leading blade locking lever and the member for releasing the locking of the balancer locking lever are provided independently, but they may be the same member.
By using the same member, the number of parts can be reduced, the cost can be reduced, and the device can be downsized.

(Effects of the Invention) Since the balancer drive member is unlocked after the shutter drive member is unlocked, the shutter drive member and the balancer drive member are unlocked almost at the same time as compared with the conventional device. Since it is possible to eliminate the time and effort for releasable adjustment at the same time during assembly, it is possible to reduce the manufacturing cost.

Further, in the conventional device, both driving members cannot be released at the same time due to a change in the friction coefficient of the locking portion due to environmental changes such as temperature changes. There is a risk that the image will be stopped and the impact at the time of stopping will adversely affect the photograph, but this is not the case in the present application.

Further, in the present application, since the operation of releasing the first locking key is performed before the operation of releasing the balancer locking key, the balancer locking release operation affects the first locking key releasing operation. There is nothing.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a shutter device according to the present invention, FIG. 2 is a view taken in the direction of arrow B in FIG. 1, FIG. 3 is a view taken in the direction of arrow A in FIG.
4 and 5 are detailed views inside the broken line C of FIG. 1, 6
FIG. 7 is a view showing the development of the rear blade group in the state shown in FIG. 1, FIG. 7 is a sectional view taken along the line DD of FIG. 4, and FIG.
It is a figure which shows the development condition of the front blade group in the state of the figure. (Explanation of symbols of main parts) 1 …… Motor, 21 …… Shutter substrate 118 …… Balancer weight 69 …… Rear drive lever 101 …… Front drive lever 108 …… Front blade locking lever 91 …… Rear blade engagement Stop lever 110 …… Front brake lever 96 …… Rear brake lever 153 …… Front blade magnet 143 …… Rear blade magnet 163 …… Front armature lever 164 …… Rear armature lever 141 …… Balancer locking lever

Claims (3)

[Claims] 1. A shutter member that can travel on an opening provided in a shutter substrate, a release member that can be externally operated, and that instructs activation of the shutter member by the operation, and a shutter member that operates according to the operation of the release member. A shutter driving member that drives the shutter member, a balancer that operates in a direction opposite to the operating direction of the shutter member, and that cancels vibrations and shocks that occur when the shutter member moves and stops, and the release. A balancer driving member that drives the balancer according to the operation of the member; a locking member that locks the shutter driving member and the balancer driving member at predetermined positions before the release operation; and the release operation. According to the above, a release member for releasing the locking by the locking member and enabling the both driving members respectively. And, wherein the release member, after releasing the lock of the shutter drive member, a shutter device, characterized in that to release the locking of the balancer drive member. 2. The locking member includes a shutter locking member that locks the shutter driving member and a balancer locking member that locks the balancer driving member, and both locking members are independent of each other. The shutter device according to claim 1, wherein the shutter device is provided. 3. The release member includes a shutter release member that releases the lock of the shutter lock member and a balancer release member that releases the balancer lock member, and both release members are independently provided. The shutter device according to claim 2, wherein the shutter device is provided.