JP6421080B2 - Camera focal plane shutter and camera - Google Patents

Description

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

  Some focal plane shutters (hereinafter also simply referred to as “shutters”) mounted on a camera hold a shutter curtain composed of a plurality of blades in a predetermined state in a set state. Thereafter, when a release signal is input in response to pressing of the release button, the shutter curtain is released from the set state and runs using a biasing force such as a spring as a drive source.

  This type of shutter includes a drive control mechanism for maintaining the state of the shutter curtain. The drive control mechanism includes an iron piece, an electromagnet, a self-holding solenoid, and the like as a drive lever for driving the shutter curtain. The drive control mechanism is switched according to the release signal to energize the electromagnet, self-holding solenoid, etc. Switch to the state that was solved. For example, when an electromagnet is employed, the set state is released by stopping energization of the electromagnet according to the release signal. For example, when a self-holding solenoid is employed, the set state is released by energizing the self-holding solenoid in response to the release signal.

JP 2014-182216 A

  Even if the electromagnet, self-holding solenoid, or the like is switched according to the release signal, the suction holding is not released immediately, and the shutter curtain does not start running. A time shift of about microseconds occurs. Such a time delay from when the energization to the drive control mechanism is switched to when the shutter curtain starts running varies depending on the shutter.

  If a mechanical configuration is added to adjust the individual differences in the time delay, the shutter becomes large, the shutter configuration becomes complicated, and the shutter becomes expensive. In addition, the time delay can be adjusted by changing the number of windings of coils such as electromagnets and self-holding solenoids included in the drive control mechanism, and the thickness of the wiring that constitutes the coils. It is very troublesome to change the electromagnet, the self-holding solenoid, etc. for each shutter.

  The present invention has been made in view of the above-described circumstances, and easily adjusts a time delay from when the power supply to the drive control mechanism is switched to when the shutter curtain starts to travel with a simple configuration. An object of the present invention is to provide a focal plane shutter or the like for a camera capable of performing the above.

In order to achieve the above object, a focal plane shutter for a camera according to a first aspect of the present invention includes:
A drive control mechanism that switches whether or not to run the shutter curtain according to the presence or absence of energization;
A substrate,
A wiring including at least one set of a high resistance wiring and a low resistance wiring for connecting two points on the substrate in parallel with different resistance values and electrically connected to the drive control mechanism section.

The focal plane shutter for a camera according to the second aspect of the present invention is:
A drive control mechanism that switches whether or not to run the shutter curtain according to the presence or absence of energization;
A substrate,
The drive control mechanism unit includes at least one set of a high resistance wiring connecting between two points on the substrate and a low resistance wiring connecting to each of the two points on the substrate including a separated portion. And wiring electrically connected to the
When the separated portions are electrically connected, the resistance value of the electrically connected low resistance wiring is the same as that of the electrically connected low resistance wiring. Less than the resistance value.

  According to the present invention, the wiring includes one or more sets of high resistance wiring and low resistance wiring that connect two points on the substrate in parallel with different resistance values. In this case, the magnitude of the resistance of the entire wiring changes only by cutting out a part of the low resistance wiring. Therefore, it is possible to change the magnitude of the current flowing through the drive control mechanism when energized by simply cutting off a part of the low resistance wiring.

  One or more sets of a high resistance wiring connecting between two points on the substrate and a low resistance wiring connecting to each of the two points on the substrate including a separated portion are included. In this case, the magnitude of the resistance of the entire wiring changes only by connecting the separated portions. Therefore, it is possible to change the magnitude of the current flowing through the drive control mechanism when energized simply by connecting the separated portions.

  Therefore, it is possible to easily adjust the time delay from when the drive control mechanism is turned on to when the shutter curtain starts running with a simple configuration.

It is a figure which shows the principal part structure of the camera which concerns on Embodiment 1 of this invention. 3 is a block diagram showing a functional configuration of a focal plane shutter for a camera according to Embodiment 1. FIG. 2 is a front view of a focal plane shutter for a camera according to Embodiment 1. FIG. FIG. 4 is a front view of the camera focal plane shutter according to the first embodiment, and is a view in which hidden lines are added to FIG. 3. 2 is an exploded perspective view of a focal plane shutter for a camera according to Embodiment 1. FIG. 6 is a diagram illustrating an example of a state in which the resistance value of the first wiring is adjusted by the camera focal plane shutter according to Embodiment 1. FIG. It is a front view of the focal plane shutter for cameras which concerns on Embodiment 2 of this invention. 10 is a diagram illustrating an example of a state in which the resistance value of the first wiring is adjusted by the camera focal plane shutter according to Embodiment 2. FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same elements are denoted by the same reference symbols throughout the drawings. Further, terms indicating directions such as front, back, front and rear, top and bottom, left and right are used for explanation, and are not intended to limit the invention of the present application.

Embodiment 1 FIG.
A camera 100 according to Embodiment 1 of the present invention is an apparatus for photographing a subject, and as shown in FIG. 1, a lens 101 for forming an image of the subject, and an exposure as shown in FIG. A diaphragm blade 102 to be adjusted, a focal plane shutter for a camera (hereinafter also simply referred to as “shutter”) 103, a solid-state image sensor 104 that outputs an electrical signal corresponding to the photographed image, and a solid-state image sensor 104. And an image processing circuit 105 that generates image data indicating a captured image, and a control unit 106 that controls the entire camera 100.

  The image data generated by the image processing circuit 105 is stored in a memory (not shown) such as a DRAM under the control of the control unit 106, for example.

  Note that the solid-state imaging device 104 is physically configured by, for example, a CCD (Charge Coupled Device) image sensor, a CMOS (Complementary MOS) image sensor, or the like. The control unit 106 physically includes, for example, one or a plurality of processors, an electric circuit, a RAM (Random Access Memory), a ROM (Read Only Memory), and the like.

  As shown in the block diagram of FIG. 2, the front view of FIGS. 3 and 4, and the exploded perspective view of FIG. 5, the shutter 103 exposes the solid-state image sensor 104 by running at the base plate 107 and shooting. The front curtain 108 and the rear curtain 109, the front curtain drive mechanism 110 and the rear curtain drive mechanism 111 for running the front curtain 108 and the rear curtain 109, respectively, and the front curtain 108 are in a state before photographing. In response to pressing of the release button, the front curtain drive control mechanism 112 for holding in the set state, the rear curtain drive control mechanism 113 for holding the rear curtain 109 in the set state before photographing, and the release button And a circuit board 114 including a circuit CR_1 for supplying the front curtain release signal and the rear curtain release signal to the front curtain drive control mechanism 112 and the rear curtain drive control mechanism 113, respectively. Here, FIG. 4 is a diagram in which the hidden lines in FIG. 3 are added by dotted lines.

  Here, the front curtain release signal and the rear curtain release signal are respectively input to the front curtain drive control mechanism 112 and the rear curtain drive control mechanism 113 via the circuit CR_1 in response to depression of the release button. A signal having a predetermined voltage. The release signal is input to the circuit CR_1 of the circuit board 114 from a power source (not shown) such as a battery mounted on the camera 100, for example, through an electric circuit, the control unit 106, or the like as appropriate.

  For example, as shown in FIG. 3, the ground plate 107 is a plate-like member having a substantially rectangular opening 115 when viewed from the front, and is made of, for example, a synthetic resin. Each member constituting the shutter 103 is attached to the main plate 107.

  As shown in FIGS. 3 and 4, the front curtain 108 includes two front curtain arms and four front curtain blades that are pivotally supported in order in the length direction thereof. The two front curtain arms are arranged on the imaging element side (back side) with respect to the four front curtain blades, and the vicinity of each end is rotatably attached to the base plate 107 by the shaft member. Yes.

  As shown in FIGS. 3 and 4, the rear curtain 109 is configured in substantially the same manner as the front curtain 108. That is, the rear curtain 109 has two rear curtain arms and four rear curtain blades pivoted in order in the length direction thereof. The two rear curtain arms are arranged on the imaging element side (back side) with respect to the four rear curtain blades, and the vicinity of each end is rotatably attached to the base plate 107 by the shaft member. Yes.

  For example, in the set state, as shown in FIGS. 3 and 4, the front curtain 108 is held in a state where it is unfolded so as to close the opening 115, and the rear curtain 109 is folded up above the opening 115. Retained. After shooting, the front curtain 108 is folded under the opening 115 and the rear curtain 109 is unfolded so as to close the opening 115.

  The pivot mechanism for pivotally supporting each of the front curtain blades to each of the front curtain arms may be configured in substantially the same manner, for example, as follows. The pivot mechanism is composed of a rivet member that is inserted into the hole formed in the front curtain arm and the hole formed in the front curtain blade in this order, and then the tip is fixed to the front curtain blade by caulking. Is done. Thus, the front curtain arm and the connecting shaft are configured to be rotatable relative to each other. The pivoting mechanism for pivotally supporting each of the trailing blades to each of the trailing curtain arms is substantially the same as the pivoting mechanism for pivotally supporting each of the leading blades to each of the leading curtain arms. It should be configured.

  The front curtain 108 and the rear curtain 109 only need to be configured to open and close the opening 115 provided in the base plate 107 to expose the solid-state imaging device 104 by running during shooting. The number of blades, the number of arms, the pivot mechanism for pivotally supporting the blades on the arms, and the like may be changed as appropriate.

  The front-curtain drive mechanism 110 is a front-curtain spring 116 serving as a front-curtain urging means for providing a driving force, and a front-curtain for transmitting the driving force provided by the front-curtain spring 116 to the front curtain 108. And a drive lever 117.

  For example, the front curtain spring 116 biases the shaft member fixed to the front curtain drive lever 117 to rotate. In the present embodiment, in FIG. 4, the front curtain drive lever 117 is urged to rotate counterclockwise.

  The front curtain drive lever 117 is fixed with a drive pin that is rotatably inserted into the front curtain arm. The drive pin moves along the arc-shaped front curtain slot 118 formed in the base plate 107 by the biasing force of the front curtain spring 116. At the time of shooting, the front curtain 108 travels downward in FIG. 4 in accordance with the movement of the drive pin by the biasing force of the front curtain spring 116, and from the state where the opening 115 is unfolded to close the opening 115 (set state). It changes to the state folded down (state after photographing).

  The rear curtain drive mechanism 111 is configured in substantially the same manner as the front curtain drive mechanism 110. In other words, the rear-curtain drive mechanism 111 transmits a rear-curtain spring 119 as a rear-curtain urging means for providing a driving force, and the rear-curtain spring 119 transmits the driving force provided to the rear-curtain 109. And a curtain driving lever 120.

  The rear curtain spring 119 urges the shaft member fixed to the rear curtain drive lever 120 to rotate, for example. In this embodiment, the rear curtain drive lever 120 is urged to rotate counterclockwise in FIG.

  A drive pin that is rotatably inserted into the rear curtain arm is fixed to the rear curtain drive lever 120. The drive pin moves along the arc-shaped rear curtain slot 121 formed in the base plate 107 by the biasing force of the rear curtain spring 119. At the time of shooting, the rear curtain 109 travels downward in FIG. 4 along with the movement of the drive pin by the urging force of the rear curtain spring 119, and from the folded state (set state) above the opening 115 to the opening 115. It changes to the developed state (the state after photographing) so as to block.

  The front curtain drive control mechanism 112 is a mechanism for switching whether or not the front curtain 108 is driven according to the presence / absence of energization. Specifically, the front curtain is controlled in the set state according to the presence / absence of energization. It is switched between holding 108 and running the front curtain 108 by releasing the holding.

  The front curtain drive control mechanism 112 includes, for example, a front curtain iron piece 122 fixed to the front curtain drive lever 117 and an electromagnet 123 that holds and holds the front curtain iron piece 122 in a set state. The electromagnet 123 has, for example, an iron core and a coil wound around the iron core. In the electromagnet 123, a magnetic force is generated in the iron core while the coil is energized. Further, in the electromagnet 123, the iron core has almost no magnetic force while the coil is not energized, that is, while the front curtain drive control mechanism 112 is not energized. For example, when the front curtain 108 is in a set state, the front curtain iron piece 122 is disposed so as to be in contact with the iron core of the electromagnet 123 so as to be positioned in the vicinity of the iron core of the electromagnet 123.

  In the front curtain drive control mechanism 112, when the coil is energized in the set state, the front curtain iron piece 122 is attracted and held by the electromagnet 123 by the magnetic force generated in the electromagnet 123 during energization. That is, while the coil is energized, the electromagnet 123 can attract the front curtain iron piece 122 with a force larger than the force applied to the front curtain iron piece 122 by the biasing force of the front curtain spring 116. Thus, the front curtain 108 is held in the set state while the front curtain drive control mechanism 112 is energized. Further, since the magnetic force generated in the electromagnet 123 is almost eliminated by de-energizing the front curtain drive control mechanism 112, the adsorption holding of the front curtain iron piece 122 is released. As a result, the holding of the front curtain 108 in the set state is released, and the front curtain 108 travels downward in FIGS. 3 and 4 by the urging force of the front curtain spring 116. In this way, the front curtain drive control mechanism 112 causes the front curtain iron piece 122 fixed to the front curtain drive lever 117 to be generated or extinguished depending on whether or not the coil of the electromagnet 123 is energized. Whether or not to hold the suction, that is, whether or not to run the front curtain 108 is switched.

  The rear curtain drive control mechanism 113 is a mechanism for switching whether or not the rear curtain 109 is driven according to the presence / absence of energization. Switching between holding 109 and running the trailing curtain 109 by releasing the holding.

  The rear curtain drive control mechanism 113 includes, for example, a rear curtain iron piece 124 fixed to the rear curtain drive lever 120 and a solenoid 125 that holds and holds the rear curtain iron piece 124 in a set state. The solenoid 125 is a self-holding solenoid, for example, and has a permanent magnet, an iron core, and a coil wound around the iron core. In the solenoid 125, when the coil is energized, a magnetic force that cancels the magnetic force of the permanent magnet is generated in the iron core, so that the magnetic force in the entire solenoid 125 is almost eliminated. In the solenoid 125, while the coil is not energized, that is, while the trailing curtain drive control mechanism 113 is not energized, the iron core has almost no magnetic force. Have. When the rear curtain 109 is in the set state, the rear curtain iron piece 124 is disposed so as to be in contact with, for example, the permanent magnet included in the solenoid 125 so as to be positioned in the vicinity of the permanent magnet included in the solenoid 125.

  In the rear curtain drive control mechanism 113, the coil for the rear curtain 124 is attracted and held by the solenoid 125 by the magnetic force of the permanent magnet by not energizing the coil in the set state. That is, while the coil is not energized, the solenoid 125 can attract the rear curtain iron piece 124 with a force larger than the force applied to the rear curtain iron piece 124 by the urging force of the rear curtain spring 119. Thus, the rear curtain 109 is held in the set state while the rear curtain drive control mechanism 113 is not energized. Further, by energizing the coil of the rear curtain drive control mechanism 113, the overall magnetic force of the rear curtain drive control mechanism 113 is almost eliminated, so that the suction holding of the rear curtain iron piece 124 is released. As a result, the holding of the rear curtain 109 in the set state is released, and the rear curtain 109 travels downward in FIGS. 3 and 4 by the urging force of the rear curtain spring 119. In this way, the rear curtain drive control mechanism 113 causes the rear curtain iron piece 124 fixed to the rear curtain drive lever 120 to be generated or extinguished depending on whether or not the coil of the solenoid 125 is energized. It is switched whether to hold the suction, that is, whether to run the trailing curtain 109.

  For example, as shown in FIG. 3, the circuit board 114 includes a board 126 and a circuit CR_1 for supplying power supplied from a power source to the front curtain drive control mechanism 112 and the rear curtain drive control mechanism 113, Each of the four locations has four pairs of holes 127 to 130 provided in the substrate 126 for cutting the circuit CR_1 as necessary.

  The substrate 126 is made of, for example, a synthetic resin. The substrate 126 may be composed of, for example, a flexible substrate and a substrate harder than the flexible substrate. In this case, the hard substrate may be bonded to the back surface of the flexible substrate with an adhesive or the like so as to constitute a portion of the substrate 126 disposed in front of the base plate 107.

  The circuit CR_1 is formed by two rear curtain terminals 131 and 132 and two front curtain terminals 133 and 134 provided on the board 126, and first to fourth wirings 135 to 138 provided on the board 126. The material of the terminals 131 to 134 is, for example, metal. The first to fourth wirings 135 to 138 are provided on the substrate with a metal foil such as copper or conductive ink containing a metal such as silver.

  Specifically, the two rear curtain terminals 131 and 132 are connected to the two terminals 139 and 140 of the rear curtain drive control mechanism 113, respectively. Thus, the two rear curtain terminals 131 and 132 are electrically connected to the coil of the solenoid 125 included in the rear curtain drive control mechanism 113.

  The two front curtain terminals 133 and 134 are connected to the two terminals 141 and 142 of the front curtain drive control mechanism 112, respectively. Thus, the two front curtain terminals 133 and 134 are electrically connected to the coil of the electromagnet 123 included in the front curtain drive control mechanism 112.

  One end of the first wiring 135 is connected to one of the trailing curtain terminals 131. One end of the second wiring 136 is connected to the other 132 of the rear curtain terminals. The other end of the first wiring 135 and the other end of the second wiring 136 are open as shown in FIG. 3. For example, when incorporated in a camera, the other end of one wiring is connected to a reference voltage. The other end of the other wiring is connected to a wiring for inputting a release signal for the rear curtain.

  Here, the configuration of the first wiring 135 will be described in more detail. For example, as shown in FIG. 3, the first wiring 135 includes first to fifth branch points 143 to 147, and wirings 148 a to 151 a that connect two adjacent branch points in parallel with different resistance values. , 148b to 151b.

  That is, the set of the first low-resistance wiring 148a and the first high-resistance wiring 148b connects the first branch point 143 and the second branch point 144 in parallel. A set of the second low resistance wiring 149a and the second high resistance wiring 149b connects the second branch point 144 and the third branch point 145 in parallel. The set of the third low resistance wiring 150a and the third high resistance wiring 150b connects the third branch point 145 and the fourth branch point 146 in parallel. A group of the fourth low resistance wiring 151a and the fourth high resistance wiring 151b connects the fourth branch point 146 and the fifth branch point 147 in parallel.

  In each set of such wirings 148a to 151a and 148b to 151b, the high resistance wirings 148b to 151b are longer than the low resistance wirings 148a to 151a included in the same group (that is, connecting between common branch points). . Therefore, the resistance values of the high resistance wirings 148b to 151b are larger than the resistance values of the low resistance wirings 148a to 151a included in the same set.

  Note that in this embodiment, the lengths of the high resistance wirings 148b to 151b are made longer than the lengths of the low resistance wirings 148a to 151a, respectively, so that the high resistance wirings 148b to 151b included in the same set and the low resistance wirings are reduced. An example in which the resistance values of the wirings 148a to 151a are different has been described. However, the resistance values of the high resistance wirings 148b to 151b may be larger than those of the low resistance wirings 148a to 151a, respectively. For example, by providing a resistor such as a carbon resistor in one or more of the high resistance wirings 148b to 151b, the resistance values of the high resistance wirings 148b to 151b are larger than the resistance values of the low resistance wirings 148a to 151a, respectively. May be.

  The first wiring 135 according to the present embodiment includes one or more pairs of a high resistance wiring and a low resistance wiring that connect two points on the substrate in parallel with different resistance values, and is electrically connected to the drive control mechanism unit. It is an example of the wiring connected to.

  Next, for example, as shown in FIG. 3, one end of the third wiring 137 is connected to one of the front curtain terminals 133. The fourth wiring 138 has one end connected to the other end 134 of the front curtain terminal. The other end of the third wiring 137 and the other end of the fourth wiring 138 are open as shown in FIG. 3. For example, when incorporated in a camera, the other end of one of the wirings is connected to a reference voltage. The other end of the other wire is connected to a wire for inputting a release signal for the leading curtain.

  As described above, each pair of holes 127 to 130 is a set of wirings 148a to 151a and 148b to 151b that connect two of the first to fifth branch points 143 to 147 in parallel with different resistance values. Among these, the low resistance wirings 148a to 151a which are wirings having a small resistance value are provided on both sides.

  By providing such a hole, a portion of the substrate 126 sandwiched between the pair of holes 127 to 130 can be easily excised using a jig, a cutter knife, or the like. Therefore, part or all of the low resistance wirings 148a to 151a can be easily electrically disconnected as necessary.

  In addition, when the board | substrate 126 is comprised with the flexible board | substrate with which circuit CR_1 is provided, and the hard board | substrate attached to the back surface, the holes 127-130 may be provided only in a flexible board | substrate. Also by this, the part pinched | interposed into the pair of holes 127-130 among flexible substrates can be easily excised with a cutter knife. Therefore, part or all of the low resistance wirings 148a to 151a can be easily electrically disconnected as necessary.

  So far, the configuration of the camera 100 and the shutter 103 according to Embodiment 1 of the present invention has been described. From here, an example of the operation of the camera 100 and the shutter 103 according to the present embodiment will be described.

  First, the operation of the front curtain 108 of the shutter 103 will be described.

  For example, the set member expands the front curtain 108 so as to block the opening 115 of the base plate 107, and the front curtain iron piece 122 of the front curtain drive lever 117 is brought into contact with the electromagnet 123 of the front curtain drive control mechanism 112. . In this state, for example, after a predetermined voltage is applied to one of the front curtain terminals 133, the set member returns to the initial position. When a voltage is applied to one of the front curtain terminals 133, current flows through one of the front curtain terminals 133, the third wiring 137, the fourth wiring 138, and the other front curtain terminal 134. However, it flows in the coil of the electromagnet 123 of the front curtain drive control mechanism 112. As a result, the front curtain 108 is held in the set state by the magnetic force of the electromagnet 123.

  A release signal for the front curtain is input to the circuit CR_1 at one 133 of the front curtain terminals. The release signal for the front curtain is a signal that does not energize the coil of the electromagnet 123, and is 0 volts, for example. Thereby, the holding of the front curtain 108 in the set state is released, and the front curtain 108 travels downward in FIG. 3 by the urging force of the front curtain spring 116. When the front curtain 108 is folded under the opening 115 of the main plate 107, the traveling is completed.

  Next, the operation of the rear curtain 109 of the shutter 103 will be described.

  For example, the set member folds the rear curtain 109 under the opening 115 of the base plate 107 and brings the rear curtain iron piece 124 of the rear curtain drive lever 120 into contact with the solenoid 125 of the rear curtain drive control mechanism 113. At this time, the rear curtain terminals 131 and 132 are not applied. Thus, the rear curtain 109 is held in the set state by the magnetic force of the permanent magnet of the solenoid 125 of the rear curtain drive control mechanism 113.

  For example, the release signal for the rear curtain is input to the circuit CR_1 at one of the rear curtain terminals 131. The rear-curtain release signal is a signal for energizing the coil of the solenoid 125 of the rear-curtain drive control mechanism 113, and is a voltage that is large enough to cancel the magnetic force of the permanent magnet of the solenoid 125, for example. A coil that the solenoid 125 of the rear curtain drive control mechanism 113 has an electric current through one of the rear curtain terminals 131, the first wiring 135, the second wiring 136, and the other rear curtain terminal 132. Flowing into. As a result, the holding of the rear curtain 109 in the set state is released, and the rear curtain 109 travels downward in FIG. 3 by the urging force of the rear curtain spring 119. When the rear curtain 109 is unfolded so as to close the opening 115 of the main plate 107, the traveling is completed.

  Here, generally, the front curtain 108 after the front curtain release signal is input to the circuit CR_1 (that is, after the front curtain drive control mechanism 112 is switched from on to off). There is a time delay (time delay) before the vehicle starts running. Similarly, for the rear curtain 109, after the rear curtain release signal is input to the circuit CR_1 (that is, after the energization of the rear curtain drive control mechanism 113 is switched from none to presence). There is a time delay (time delay) before the curtain 109 starts to travel. Such a time delay until the leading curtain 108 starts traveling and a time delay until the trailing curtain 109 starts traveling depend on individual differences in manufacture of the electromagnet 123 and the solenoid 125. It is different.

  Therefore, as the time corresponding to the front curtain 108 exposure time, for example, the time from when the release signal for the front curtain is input to the circuit CR_1 until the upper end of the front curtain 108 reaches the upper end of the opening 115 of the base plate 107. Measure. Here, the appearance time of the front curtain 108 is the time from when the release signal for the front curtain is input to the circuit CR_1 until the upper end of the front curtain 108 reaches the upper end of the solid-state image sensor 104 when viewed from the front. It is.

  Next, as a time corresponding to the appearance time of the rear curtain 109, for example, after the release signal for the rear curtain is input to the circuit CR_1, the lower end of the rear curtain 109 reaches the upper end of the opening 115 of the base plate 107. Measure time. Here, the appearance time of the rear curtain 109 is the time from when the release signal for the rear curtain is input to the circuit CR_1 until the lower end of the rear curtain 109 reaches the upper end of the solid-state image sensor 104 when viewed from the front. It is.

  When the time corresponding to the appearance time of the rear curtain 109 is earlier than the time corresponding to the appearance time of the front curtain 108, for example, the user is sandwiched between each pair of holes 127 to 130 in the low resistance wirings 148a to 151a. Excise one part at a time.

  For example, in a state where none of the low-resistance wirings 148a to 151a is removed (the state shown in FIG. 3), the current due to the release signal flows in all of the high-resistance wirings 148b to 151b in the first wiring 135. First, it flows through the low resistance wirings 148a to 151a.

  For example, in a state where only a part of the first low-resistance wiring 148a is removed, the current due to the release signal causes the first high-resistance wiring 148b and the second to fourth low-resistance among the first wiring 135. It flows through the wirings 149a to 151a.

  For example, as shown in the front view of FIG. 6, in a state where a part of the first to second low-resistance wirings 148 a to 149 a is removed, the current due to the release signal is the first to first among the first wiring 135. The second high resistance wirings 148b to 149b and the third to fourth low resistance wirings 150a to 151a flow.

  For example, in a state in which a part of the first to third low resistance wirings 148a to 150a is cut off, the current due to the release signal is the first to third high resistance wirings 148b to 150b in the first wiring 135. And the fourth low resistance wiring 151a.

  For example, in a state in which all of the first to fourth low resistance wirings 148a to 151a are partially removed, the current generated by the release signal is the first to fourth high resistance wirings 148b to 148b of the first wiring 135. It flows through 151b.

  As described above, the entire resistance value of the first wiring 135 is changed in five stages depending on how many portions of the low resistance wirings 148a to 151a sandwiched between the pairs of the holes 127 to 130 are removed. Can do. Since the release signal is a predetermined constant voltage, the larger the overall resistance value of the first wiring 135, the smaller the current flowing through the coil of the solenoid 125 of the trailing curtain drive control mechanism 113. The smaller the current flowing through the coil of the solenoid 125 of the trailing curtain drive control mechanism 113, the more the current corresponding to the release signal flows through the coil. Increases time to occur.

  Therefore, the user simply cuts one portion of the low resistance wirings 148a to 151a sandwiched between the pairs of holes 127 to 130 one by one, and after the rear curtain release signal is input to the circuit CR_1, the rear curtain The time delay until 109 starts running can be lengthened stepwise. The time when the rear curtain release signal is input to the circuit CR_1 and the time when the energization of the rear curtain drive control mechanism 113 is switched are substantially the same.

  Therefore, according to the shutter 103 according to the present embodiment, the energization of the rear curtain drive control mechanism 113 is switched from “no” to “present” until the rear curtain 109 as the shutter curtain starts running. The time delay can be easily adjusted with a simple configuration.

  For example, in the state shown in FIG. 3, it is assumed that the time corresponding to the appearance time of the rear curtain 109 is earlier than the time corresponding to the appearance time of the front curtain 108. In this case, the portions sandwiched between the pairs of the holes 127 to 130 of the low resistance wirings 148a to 151a are removed one by one until the time corresponding to the appearance time of the rear curtain 109 and the front curtain 108 becomes substantially equal. It is good to do. By simply performing such simple processing, the time corresponding to the appearance time of the trailing curtain 109 and the leading curtain 108 can be roughly aligned.

  Further, the operation of the camera 100 will be described.

  For example, when the camera 100 is turned on and the user touches the release button, for example, at the predetermined timing before photographing, under the control of the control unit 106, for example, by a driving force of a motor (not shown) or the like. The spring 116 and the rear curtain spring 119 are wound up against each urging force.

  At this time, the control unit 106 controls the front curtain drive control mechanism unit 112 and the rear curtain drive control mechanism unit 113 to be non-energized, and the front curtain 108 and the rear curtain 109 are mechanically moved by a set member. Held in the set state.

  When the user presses the release button, the control unit 106 detects the pressing. Then, the control unit 106 energizes the front curtain drive control mechanism unit 112 to return the set member to the initial position. At this time, the mechanical holding by the set member is released, but the front curtain 108 is held in the set state by the magnetic force of the electromagnet 123, and the rear curtain 109 is held in the set state by the magnetic force of the permanent magnet included in the solenoid 125. The Then, the control unit 106 inputs each of the front curtain release signal and the rear curtain release signal to the circuit CR_1 with a time interval corresponding to the shutter time set by the user or itself. The front curtain release signal and the rear curtain release signal are input to the front curtain drive control mechanism 112 and the rear curtain drive control mechanism 113 through the circuit CR_1, respectively. That is, the control unit 106 controls whether the rear curtain drive control mechanism unit 113 is energized via the first wiring 135 and the second wiring 136. Further, the control unit 106 controls whether or not to energize the leading curtain drive control mechanism unit 112 via the third wiring 137 and the fourth wiring 138.

  As a result, the holding of the front curtain 108 and the rear curtain 109 in the set state is released with a time interval corresponding to the shutter speed. The front curtain 108 and the rear curtain 109 travel in front of the solid-state imaging device 104 by an urging force of the front curtain spring 116 and the rear curtain spring 119 with an interval corresponding to the shutter speed.

  The front curtain 108 is folded under the opening 115 of the main plate 107, and the rear curtain 109 is in a state of closing the opening 115 of the main plate 107, so that the traveling of the front curtain 108 and the rear curtain 109 is completed. Then, shooting ends.

  As described above, when the solid-state imaging device 104 is exposed by running the front curtain 108 and the rear curtain 109 during shooting, if the front curtain 108 and the rear curtain 109 have different face-off times, an accurate shutter speed can be obtained. In order to realize the above, adjustment for each shutter 103 is required, such as adjusting the timing for inputting the first curtain release signal and the second curtain release signal for each shutter 103. In addition, an additional configuration such as a control program is required.

  According to the shutter 103 according to the present embodiment, as described above, the appearance times of the front curtain 108 and the rear curtain 109 can be easily aligned with a simple configuration. As a result, the accurate shutter speed of the camera 100 can be easily realized with a simple configuration.

  In the first embodiment, the first wiring 135 includes four sets of wirings that connect two points (first to fifth branch points 143 to 147) on the substrate in parallel with different resistance values. explained. However, the first wiring may include one or more wiring sets that connect two points on the substrate in parallel with different resistance values. This also has the same effect as the first embodiment.

  In the first embodiment, the shutter 103 including the front curtain 108 and the rear curtain 109 has been described as an example. However, a single-curtain shutter may be used. The drive control mechanism that switches whether or not to run the shutter curtain according to the presence or absence of energization includes at least one set of wirings that connect two points on the board in parallel with different resistance values. What is necessary is just to be comprised so that it can switch through 1 wiring.

  According to this, as in the case of the rear curtain 109 in the first embodiment, a time delay from when the drive control mechanism is switched on to when the shutter curtain starts running can be easily configured with a simple configuration. It becomes possible to adjust to.

  In such a single-curtain shutter, the face-out time can be easily approximated to a reference value that is appropriately determined with a simple configuration. Therefore, in a camera equipped with such a single-curtain shutter, variation in the release time lag can be simplified. It becomes possible to reduce easily by simple structure. Here, the release time lag is the time from the release to the end of shooting.

  In the first embodiment, an example in which the resistance value of the first wiring 135 for energizing the trailing curtain drive control mechanism 113 including the self-holding solenoid 125 can be easily changed with a simple configuration will be described. did. However, the wiring (the third wiring 137 or the fourth wiring 138) for energizing the drive control mechanism section (for example, the front curtain drive control mechanism section 112) including the electromagnet 123 is the same as the first wiring 135. Wiring provided with the structure of may be applied.

  Generally, even with the electromagnet 123, the time delay from when the current is energized until the shutter curtain (for example, the front curtain 108) starts running is shorter than that of the self-holding solenoid, but is not zero. Therefore, also according to this modification, it is possible to easily adjust the time delay from when the drive control mechanism unit is switched on to when the shutter curtain starts running with a simple configuration.

Embodiment 2. FIG.
In the first embodiment, whether or not the rear curtain drive control mechanism 113 is energized is switched by cutting a portion of the low resistance wirings 148a to 151a sandwiched between the pairs of holes 127 to 130. The example in which the time delay until the trailing curtain 109 starts running has been described. In this embodiment, an example will be described in which portions corresponding to the portions of the low resistance wirings 148a to 151a sandwiched between the pairs of holes 127 to 130 in Embodiment 1 are provided separately in advance.

  As shown in FIG. 7, the shutter 203 according to the present embodiment has a circuit board 214 provided with a circuit CR_2 provided on the board 226, and the board 226 is not provided with holes 127 to 130. The shutter 103 may be configured similarly to the shutter 103 according to the first embodiment. The circuit CR_2 according to the present embodiment may be configured in the same manner as the circuit CR_1 according to the first embodiment, except for the configuration of the first wiring 135 according to the first embodiment.

  As shown in FIG. 7, the first wiring 235 according to the present embodiment includes first to fifth branch points 143 to 147, includes separated portions, and is provided at each of two adjacent branch points. A set of low resistance wirings 248a to 251a to be connected and high resistance wirings 148b to 151b to connect between two adjacent branch points is included. For example, when separated portions of the low-resistance wirings 248a to 251a are electrically connected by soldering or the like, the resistance values of the electrically connected low-resistance wirings 248a to 251a are the low resistance wirings that are electrically connected. The resistance value is smaller than that of the high resistance wirings 148b to 151b included in the same set as the wirings 248a to 251a.

  Specifically, in the set of the first low resistance wiring 248a and the first high resistance wiring 148b, the first low resistance wiring 248a is partially separated from the first branch point 143 and the second high resistance wiring 248a. The first high-resistance wiring 148 b is connected to the branch point 144 and connects between the first branch point 143 and the second branch point 144.

  In the set of the second low resistance wiring 249a and the second high resistance wiring 149b, the second low resistance wiring 249a is partially separated, and the second branch point 144 and the third branch point 145 are separated from each other. The second high-resistance wiring 149b connects between the second branch point 144 and the third branch point 145.

  In the set of the third low-resistance wiring 250a and the third high-resistance wiring 150b, the third low-resistance wiring 250a is partially separated, and the third branch point 145 and the fourth branch point 146 are separated from each other. And the third high-resistance wiring 150 b connects between the third branch point 145 and the fourth branch point 146.

  In the set of the fourth low resistance wiring 251a and the fourth high resistance wiring 151b, the fourth low resistance wiring 251a is partially separated, and the fourth branch point 146 and the fifth branch point 147 are separated from each other. The fourth high-resistance wiring 151 b connects between the fourth branch point 146 and the fifth branch point 147.

  When the separated portions of the low resistance wirings 248a to 251a are electrically connected, the resistance values of the electrically connected low resistance wirings 248a to 251a are respectively higher than the resistance values of the high resistance wirings 148b to 151b. Is also small.

  The first wiring 235 according to the present embodiment is a set of a high-resistance wiring that connects two points on the substrate and a low-resistance wiring that connects to each of the two points on the substrate including a separated portion. This is an example of the wiring that includes one or more of these and is electrically connected to the drive control mechanism.

  So far, the configuration of the shutter 103 according to the second embodiment of the present invention has been described. From here, an example of the operation of the shutter 203 according to the present embodiment will be described.

  The operations of the front curtain 108 and the rear curtain 109 of the shutter 203 are substantially the same as the operations of the front curtain 108 and the rear curtain 109 of the shutter 103 according to Embodiment 1, respectively.

  In the present embodiment, when the time corresponding to the appearance time of the rear curtain 109 is later than the time corresponding to the appearance time of the front curtain 108, for example, the user selects one separated portion of the low resistance wirings 248a to 251a. Make electrical connections one by one.

  For example, in a state where none of the spaced apart portions of the low resistance wirings 248a to 251a are electrically connected (the state shown in FIG. 7), the release signal (current) is the first to first among the first wirings 135. It flows through the fourth high-resistance wirings 148b to 151b.

  For example, in a state where only the separated portions of the fourth low-resistance wiring 251a are electrically connected, the release signal (current) is transmitted from the first wiring 135 to the first to third high-resistance wirings 148b to 150b. And the fourth low-resistance wiring 251a.

  For example, as shown in the front view of FIG. 8, in the state where the separated portions of the third to fourth low resistance wirings 250 a to 251 a are electrically connected, the release signal (current) is transmitted from the first wiring 135. Among these, the first to second high resistance wirings 148b to 149b and the third to fourth low resistance wirings 250a to 251a flow.

  For example, in a state where the separated portions of the second to fourth low resistance wirings 249a to 251a are electrically connected, the release signal (current) is transmitted to the first high resistance wiring 148b of the first wiring 135. The second to fourth low resistance wirings 249a to 251a flow.

  For example, in a state where all of the first to fourth low resistance wirings 248 a to 251 a are electrically connected to each other, the release signal (current) is output from the first wiring 135 by the high resistance wirings 148 b to 151 b. None of these flows through the low-resistance wirings 248a to 251a.

  As described above, the entire resistance value of the first wiring 235 can be changed in five stages depending on how many separated portions of the low resistance wirings 248a to 251a are electrically connected. Since the release signal is a predetermined constant voltage as in the first embodiment, the smaller the overall resistance value of the first wiring 235 is, the more the solenoid 125 of the trailing curtain drive control mechanism unit 113 has. The current flowing through the coil increases. The larger the current that flows through the coil of the solenoid 125 of the rear curtain drive control mechanism 113, the more the current corresponding to the release signal flows through the coil, and then the magnetic force that counteracts the magnetic force of the permanent magnet that the solenoid 125 has is applied to the iron core. Time to occur is shortened.

  For this reason, the time from when the rear curtain release signal is input to the circuit CR_2 until the rear curtain 109 starts running only by electrically connecting the separated portions of the low resistance wirings 248a to 251a. The delay can be shortened in steps. The time when the rear curtain release signal is input to the circuit CR_2 and the time when the energization of the rear curtain drive control mechanism 113 is switched are substantially the same as described in the first embodiment.

  Therefore, according to the shutter 203 according to the present embodiment, the energization of the rear curtain drive control mechanism unit 113 is switched from “no” to “present” until the rear curtain 109 as the shutter curtain starts running. The time delay can be easily adjusted with a simple configuration.

  For example, in the state shown in FIG. 7, it is assumed that the time corresponding to the appearance time of the rear curtain 109 is later than the time corresponding to the appearance time of the front curtain 108. In this case, it is preferable to electrically connect the separated portions of the low resistance wirings 248a to 251a one by one until the time corresponding to the appearance time of the rear curtain 109 and the front curtain 108 becomes substantially equal. By simply performing such simple processing, the time corresponding to the appearance time of the trailing curtain 109 and the leading curtain 108 can be roughly aligned.

  As described above, according to the shutter 203 according to the present embodiment, the appearance times of the front curtain 108 and the rear curtain 109 can be easily aligned with a simple configuration. As a result, a camera having a shutter 203 instead of the shutter 103 of the camera 100 can easily realize an accurate shutter speed with a simple configuration as described in the first embodiment.

  As mentioned above, although embodiment and the modification of this invention were demonstrated, this invention is not limited to these. Each embodiment and each modification may be combined as appropriate.

  As an example in which the first and second embodiments are combined, the shutter may include a circuit board having the circuit board 114 illustrated in FIG. 5 as an initial state. According to this, by removing one portion of each of the first and second low resistance wirings 148a to 149a sandwiched between the pairs of holes 127 to 128 to the rear curtain drive control mechanism 113, The time delay until the trailing curtain 109 starts running after the presence / absence of energization is switched can be increased stepwise, and one separated portion of the third and fourth low resistance wirings 250a to 251a is provided. By electrically connecting each one, the time delay can be shortened step by step. Therefore, it is possible to cope with both a case where the time delay until the trailing curtain 109 starts running after the switching of the energization of the trailing curtain drive control mechanism unit 113 is made long or a case where it is shortened. become.

  The present invention is capable of various embodiments and modifications without departing from the broad spirit and scope of the present invention. The above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. In other words, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

DESCRIPTION OF SYMBOLS 100 Camera 101 Lens 102 Aperture blade 103,203 Camera focal plane shutter (shutter)
DESCRIPTION OF SYMBOLS 104 Solid-state image sensor 105 Image processing circuit 106 Control part 107 Base plate 108 Front curtain 109 Rear curtain 110 Front curtain drive mechanism part 111 Rear curtain drive mechanism part 112 Front curtain drive control mechanism part 113 Rear curtain drive control mechanism part 114 , 214 Circuit board 115 Opening 116 Front curtain spring 117 Front curtain drive lever 118 Front curtain slot 119 Rear curtain spring 120 Rear curtain drive lever 121 Rear curtain slot 122 Front curtain iron piece 123 Electromagnet 124 Rear curtain Iron piece 125 Solenoid 126, 226 Substrate CR circuit 127-130 Hole 131, 132 Rear curtain terminal 133, 134 Front curtain terminal 135-138, 235 First to fourth wirings 139, 140 Rear curtain drive control mechanism Terminals 141 and 142 Terminals 143 to 147 of the front curtain drive control mechanism section 1st to 5th branch points 148a to 51a, 248a~251a low resistance wiring 148b~151b high resistance wire

Claims (5)

A drive control mechanism that switches whether or not to run the shutter curtain according to the presence or absence of energization;
A substrate,
Camera focal comprising: one or more pairs of high resistance wiring and low resistance wiring that connect two points on the substrate in parallel with different resistance values, and wiring that is electrically connected to the drive control mechanism section Plain shutter. 2. The focal plane shutter for a camera according to claim 1, wherein the substrate has holes provided on both sides of a wiring having a small resistance value among a set of wirings connecting the two points. A drive control mechanism that switches whether or not to run the shutter curtain according to the presence or absence of energization;
A substrate,
The drive control mechanism unit includes at least one set of a high resistance wiring connecting between two points on the substrate and a low resistance wiring connecting to each of the two points on the substrate including a separated portion. And wiring electrically connected to the
When the separated portions are electrically connected, the resistance value of the electrically connected low resistance wiring is the same as that of the electrically connected low resistance wiring. Camera focal plane shutter smaller than resistance. The focal plane shutter for a camera according to any one of claims 1 to 3, wherein the drive control mechanism unit includes a self-holding solenoid. A focal plane shutter for a camera according to any one of claims 1 to 4,
And a controller that controls whether or not the drive control mechanism is energized via the wiring.

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