JP2015127824A - Imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging apparatus with improved operability when using it by attaching a storable lens barrel with a shortened length thereof.SOLUTION: An imaging apparatus (130) includes: an imaging element (201) for imaging an image formed by an optical system in a state that the imaging element is arranged to space apart by a first distance from the optical system in an optical axis direction of the optical system; distance varying means for varying the distance between the optical system and the imaging element to a second distance narrower than the first distance; detecting means (S1) for detecting that the distance between the optical system and the imaging element has been changed to the second distance; a power supply device (205) for selectively supplying power to the imaging element; and shut-off means for shutting off power supply from the power supply device when detecting the detecting means that the second distance is obtained during the power supply from the power supply device to the imaging element.

Description

  The present invention relates to an imaging device and an interchangeable lens.

  Conventionally, by operating the zooming operation member outside the range of zooming operation, the lens is moved to the mount side along the optical axis direction to shorten the overall length of the lens barrel (hereinafter referred to as the lens barrel length). A known lens barrel is known (see, for example, Patent Document 1).

JP-A-2-25815

  In a camera equipped with a lens barrel that can be stored with the lens barrel length shortened as described above, the lens barrel length of the lens barrel can be changed from a use state where the power is on to a non-use state. Since the camera body was turned off after shortening, there was a problem that the operability was poor.

The present invention solves the above problems by the following means.
The invention according to claim 1 is an imaging device in which an interchangeable lens capable of switching between a storage state in which the optical system is stored in a predetermined position and a shooting state in which the optical system is extended from the predetermined position is removable. An image sensor that captures an image formed through the mounted interchangeable lens, a determination unit that determines whether or not the interchangeable lens is in the retracted state, a power supply unit that supplies power to the image sensor, A blocking unit that blocks supply of power to the imaging element by the power supply unit when the determination unit determines that the storage unit is in the housed state while the power supply unit supplies power to the imaging element. And an imaging apparatus comprising:
According to a fourth aspect of the present invention, there is provided an interchangeable lens having an optical system and capable of switching between a storage state in which the optical system is stored in a predetermined position and a photographing state in which the optical system is extended from the predetermined position. An image pickup device that picks up an image formed by the optical system, a power supply unit that supplies power to the image pickup device, and the optical system in a state where the power supply unit supplies power to the image pickup device. Can be attached to an image pickup apparatus that cuts off the power supply to the image sensor by the power supply unit when the power supply unit is in the housed state, and the power supply to the image sensor by the cut-off unit is cut off. Therefore, the present invention is an interchangeable lens comprising detection means for detecting that the optical system is in the housed state for detection provided to the imaging apparatus.
According to a sixth aspect of the present invention, there is provided a lens barrel that can be switched between a storage state in which the optical system is stored at a predetermined position and a photographing state in which the optical system is extended from the predetermined position, and the lens barrel. An image pickup device that picks up an image formed through the image pickup device, a power supply unit that supplies power to the image pickup device, and a rotating member that allows the user to rotate around the lens barrel around the optical axis of the optical system. An operation member operable to switch the optical system between the storage state and the photographing state, and a determination for determining that the state of the optical system has been switched to the storage state by the operation member And the power supply unit supplies power to the image sensor when the determination unit determines that the power unit is switched to the storage state. A blocking section for blocking. An imaging apparatus according to claim.

  ADVANTAGE OF THE INVENTION According to this invention, the imaging device and interchangeable lens which improved the operativity at the time of using the lens barrel which can shorten and can accommodate a lens-barrel can be provided.

It is a schematic sectional drawing which shows the camera system of 1st Embodiment. It is a circuit diagram which shows the structure of the camera system in 1st Embodiment. It is explanatory drawing which shows the combination of the state of two switches shown in 1st Embodiment, and the power supply state of a camera system. It is a circuit diagram which shows the structure of the camera system in 2nd Embodiment. It is a flowchart which shows the process sequence by the power supply control part until it starts supply of electric power from the state which interrupted supply of the electric power by a power supply part in 2nd Embodiment. It is a flowchart which shows the process sequence by the power supply control part until it interrupts | blocks supply of electric power from the state which is supplying the electric power by a power supply part in 2nd Embodiment.

Hereinafter, an embodiment in which an imaging apparatus according to the present invention is applied to a digital camera will be described with reference to the drawings. In the description of FIG. 1, the subject side (left side in the figure) is referred to as the front side, and the liquid crystal monitor 202 side (right side in the figure) is referred to as the rear side.
(First embodiment)

  FIG. 1 is a schematic cross-sectional view showing the camera system of the first embodiment. The camera system 100 includes a lens barrel 101 that holds an optical system in a movable manner, and a camera body 130 as an imaging device. The camera system 100 is an interchangeable lens digital camera, and a lens barrel 101 is detachably attached to a camera body 130.

  First, the lens barrel 101 will be described. In FIG. 1, the upper half of the optical axis A shows a cross-sectional view in a state where the lens barrel 101 is retracted and accommodated (hereinafter referred to as the accommodated state), and the lower half is a cross-section in the photographing state. The figure is shown. In the photographing state shown in FIG. 1, an optical system including a front group lens L1 and a rear group lens L2, which will be described later, and an imaging unit 201, which will be described later, are arranged at a first interval in the optical axis A direction. . In the storage state shown in FIG. 1, the distance between the optical system including the front group lens L1 and the rear group lens L2 and the imaging unit 201 is a second distance that is narrower than the first distance. Become.

  As shown in FIG. 1, the lens barrel 101 includes a mount cylinder 110, a fixed cylinder 106 fixed to the mount cylinder 110, a cam ring 107 disposed on the outer periphery of the fixed cylinder 106, a lens group holding frame 105, a zoom operation. A ring 108, a front group lens chamber 103, a rear group lens chamber 104, and the like disposed on the inner periphery of the fixed cylinder 106 are provided. In FIG. 1, illustration of the aperture mechanism, the AF drive mechanism, the lens side CPU, and the like in the lens barrel 101 is omitted.

  In FIG. 1, when the zoom operation ring 108 is rotated by the user, the zoom interlocking lever 109 fixed to the zoom operation ring 108 rotates and the cam ring 107 fixed to the zoom interlocking lever 109 rotates. To do. That is, the cam ring 107 rotates in conjunction with the zoom operation ring 108. The cam ring 107 includes an outer peripheral groove 107 a formed along the optical axis A. Further, the fixed cylinder 106 includes a claw portion 106a. The outer peripheral groove 107 a of the cam ring 107 is engaged with the claw portion 106 a of the fixed cylinder 106. For this reason, the cam ring 107 can rotate around the optical axis A while the position in the optical axis A direction is fixed with respect to the fixed cylinder 106.

  The lens group holding frame 105 holds the front group lens chamber 103. The lens group holding frame 105 includes a cam pin 105a. The fixed cylinder 106 includes a straight groove (not shown), and the cam ring 107 includes a cam groove 107b. The cam pin 105 a of the lens group holding frame 105 engages with the straight advance groove and the cam groove 107 b of the fixed cylinder 106. For this reason, when the zoom operation ring 108 is rotated, the cam ring 107 rotates around the optical axis A. When the cam ring 107 rotates, the cam pin 105a engaged with the cam groove 107b moves while being pushed by the cam groove 107b. The cam pin 105a moves in the direction of the optical axis A along the rectilinear groove because movement of the fixed cylinder 106 around the optical axis A is restricted by the rectilinear groove. Therefore, when the zoom operation ring 108 is rotated, the front group lens L1 held in the front group lens chamber 103 is moved together with the lens group holding frame 105 including the cam pins 105a moving in the optical axis A direction. Move to the front or rear side. As described above, the lens barrel 101 is configured as a zoom lens that changes the focal length by rotating the zoom operation ring 108.

  The rear group lens chamber 104 holds a rear group lens L2 for focus adjustment. The rear lens group chamber 104 is driven forward or rearward in the optical axis A direction by an actuator (not shown). The rear lens group chamber 104 is engaged with a lead groove (not shown) provided in the front lens group chamber 103. The lead groove is provided along the optical axis A direction. When the rear lens group chamber 104 is driven by the actuator, the rear lens group chamber 104 moves along the lead groove. Thereby, the distance of the rear group lens L2 with respect to the front group lens L1 changes, and the focus of the subject image formed on the imaging unit 201 described later is adjusted.

  The configuration including the front group lens chamber 103, the rear group lens chamber 104, the lens group holding frame 105, the fixed cylinder 106, the cam ring 107, the zoom operation ring 108, and the mount cylinder 110 described above includes the front group lens L1 and the rear group. It functions as an interval changing unit that changes the interval between the optical system including the lens L2 and the imaging unit 201 to a second interval that is narrower than the first interval.

  The fixed cylinder 106 includes a state detection switch S1. The state detection switch S1 is a detection unit that detects that the distance between the optical system including the front group lens L1 and the rear group lens L2 and the imaging unit 201 is the second distance. As shown in the photographing state (lower half) of FIG. 1, the state detection switch S1 is a position where the distance between the imaging unit 201 and the optical system including the front lens group L1 and the rear lens group L2 corresponds to the first distance. When it is, it takes the first state. That is, the state detection switch S1 is in a state where the tip of the switch protrudes to the front side, as indicated by a broken line in FIG. Further, as shown in the upper half of FIG. 1, the state detection switch S1 is moved to a position where the distance between the imaging unit 201 and the optical system including the front group lens L1 and the rear group lens L2 corresponds to the second distance. When this occurs, the second state is displaced from the first state. That is, the state detection switch S1 is in a state where the tip of the switch is pushed rearward by the rear end surface 105b of the lens group holding frame 105, as indicated by a solid line in FIG. The first state and the second state of the state detection switch S1 will be described later.

  The mount cylinder 110 includes a plurality of bayonet claws 110a around the optical axis. Further, the camera body 130 includes a plurality of bayonet claws 130a around the optical axis of the mount portion (reference numeral omitted). The lens barrel 101 can be fixed (attached) to the camera body 130 by engaging the bayonet claws 110a on the lens barrel 101 side with the bayonet claws 130a on the camera body 130 side. In addition, the mount cylinder 110 includes a plurality of lens side electrical contacts 120. The lens-side electrical contact 120 has a lens contact 120a inserted therein. Each lens contact 120 a is connected to a lens side FPC (flexible printed circuit board) 121. The lens side FPC 121 is connected to a lens side CPU 111 described later.

  Next, the camera body 130 will be described. The camera body 130 includes a plurality of camera-side electrical contacts 131 on the mount portion. The rear end of each camera-side electrical contact 131 is biased toward the lens barrel 101 by a biasing spring 132 having conductivity. The rear end of the urging spring 132 is in contact with a conduction portion (not shown) formed on the surface of the camera side FPC 133. On the other hand, the back side of the camera side FPC 133 is pressed by the FPC backing plate 134. For this reason, the camera-side electrical contact 131 comes into contact with the lens-side electrical contact 120 while being biased toward the lens-side electrical contact 120 side. The camera side FPC 133 is connected to the camera side CPU 200. As a result, various signals and data are communicated between the lens side CPU (not shown) and the camera side CPU 200. Although not shown in FIG. 1, power is supplied from the camera body 130 to the lens barrel 101 side through the electrical contacts as described above.

  The camera body 130 further includes an imaging unit 201, a liquid crystal monitor 202, a power status display lamp 203, and a power switch S2. The imaging unit 201 includes an imaging element (not shown) that captures a subject image formed by the lens barrel 101. The subject image picked up by the image pickup unit 201 is converted into an electrical image signal and then output to an image processing unit (not shown). The liquid crystal monitor 202 is a display unit that displays subject images (reproduced images, live view images, and the like) captured by the imaging unit 201, information on shooting conditions and operations, setting information, and the like. The power status display lamp 203 is a lamp for informing the user of the power status. The power status display lamp 203 is lit when the power is on, and is turned off when the power is off.

  The power switch S <b> 2 is a slide switch that selectively switches power supply by a power source unit 205 (described later) provided in the camera body 130. When the power switch S2 is switched to the ON position, power is supplied from the power supply unit 205. On the other hand, when the power switch S2 is switched to the OFF position, power is not supplied from the power supply unit 205.

  In addition, a mirror unit, a finder optical unit, a photometric unit, a distance measuring unit, a shutter mechanism, and the like (not shown) are arranged inside the camera body 130.

  FIG. 2 is a circuit diagram showing a configuration of the camera system 100. In FIG. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals. In FIG. 2, contacts A to D between the lens barrel 101 and the camera body 130 correspond to the contacts of the lens side electrical contact 120 and the camera side electrical contact 131 shown in FIG.

  The state detection switch S1 of the lens barrel 101 is in a conductive state (hereinafter referred to as a second state) with the switch contact closed when the lens barrel 101 is in the storage state shown in the upper half of FIG. In the photographing state shown in the lower half of FIG. 1, the switch contacts are opened and become a non-conductive state (hereinafter referred to as a first state). The lens side CPU 111 is a circuit that controls a diaphragm mechanism and an AF drive mechanism (not shown).

  In the camera body 130, a camera side CPU 200, a DC-DC converter 204, and a power supply unit 205 are connected via a power switch S2, resistors R1, R2, and a transistor Tr1.

  The camera-side CPU 200 is a circuit that controls the entire camera system 100 in an integrated manner, and is connected to the power supply unit 205 via the DC-DC converter 204 and the transistor Tr1. The camera-side CPU 200 supplies signals necessary for the operation of the imaging unit 201 and the display control circuit 206 and also supplies power from the power supply unit 205.

  The power supply unit 205 is a power supply device that supplies power to the camera side CPU 200 and the lens side CPU 111 via the DC-DC converter 204. While power is supplied from the power supply unit 205, the camera-side CPU 200 supplies an imaging control signal and power to the imaging unit 201 and supplies a lamp lighting signal and power to the display control circuit 206. On the other hand, when power is not supplied from the power supply unit 205, the camera-side CPU 200 stops supplying signals and power necessary for the operation of the imaging unit 201 and the display control circuit 206. That is, the power supply unit 205 functions as a power supply device that selectively supplies power to the imaging unit 201.

  The power supply unit 205 and the DC-DC converter 204 are connected by a transistor Tr1. The transistor Tr1 is a PNP transistor, and when a base current flows through the base (B), a current flows from the emitter (E) to the collector (C). That is, the current from the power supply unit 205 is supplied to the DC-DC converter 204. When the base current does not flow to the base (B), no current flows from the emitter (E) to the collector (C). That is, the supply of current from the power supply unit 205 to the DC-DC converter 204 is interrupted. The current flow from the emitter (E) to the collector (C) of the transistor Tr1 is controlled by the potential of the base (B). That is, if the potential of the base (B) is low, a base current flows through the base (B), so that a current flows from the emitter (E) to the collector (C). Further, if the potential of the base (B) is high, no base current flows through the base (B), so that no current flows from the emitter (E) to the collector (C). The potential of the base (B) is controlled by the state of the state detection switch S1, as will be described later.

  As described above, the state detection switch S1 closes the switch contact when the lens barrel 101 is in the retracted state and becomes conductive (second state), and when the lens barrel 101 is in the photographing state, the switch contact opens and is not conductive. This is a switch in the (first state). That is, the state detection switch S1 is in the second state when the distance between the imaging unit 201 and the optical system including the front group lens L1 and the rear group lens L2 corresponds to the second distance that is narrower than the first distance. Thus, when the distance between the optical system including the front lens group L1 and the rear lens group L2 and the imaging unit 201 corresponds to the first distance, the first state is set.

  When the state detection switch S1 is in the second state, the base current does not flow to the base (B) of the transistor Tr1, so that no current flows from the emitter (E) to the collector (C). For this reason, the supply of current from the power supply unit 205 to the DC-DC converter 204 is interrupted. On the other hand, when the state detection switch S1 is in the first state, a base current flows through the base (B) of the transistor Tr1, and thus a current flows from the emitter (E) to the collector (C). Therefore, current is supplied from the power supply unit 205 to the DC-DC converter 204.

  In FIG. 2, the circuit connected around the transistor Tr1 constitutes a blocking means in this embodiment. This shut-off means is configured such that the power supply unit 205 supplies power to the imaging unit 201, and the state detection switch S1 sets the distance between the imaging unit 201 and the optical system including the front group lens L1 and the rear group lens L2. 2 is detected, that is, when the state detection switch S1 is in the second state, the supply of power by the power supply unit 205 is cut off. Further, when the power supply unit 205 supplies power and the power supply unit 205 interrupts the supply of power by the state detection switch S1, the state detection switch S1 is displaced from the second state to the first state. The power supply is resumed.

  The power switch S2 of the camera body 130 is a switch that makes the base (B) of the transistor Tr1 conductive and non-conductive. When the power switch S2 is switched to the on position shown in FIG. 1, the switch contact opens and becomes non-conductive, and when the power switch S2 is switched to the off position shown in FIG. 1, the switch contact closes and becomes conductive.

The camera side CPU 200 is connected to the display control circuit 206. The display control circuit 206 is a circuit that controls turning on / off of the power supply state display lamp 203 and screen display of the liquid crystal monitor 202. The camera-side CPU 200 is turned on when power is supplied from the DC-DC converter 204. While the power is supplied from the DC-DC converter 204, the camera-side CPU 200 supplies a lamp lighting signal and power to the display control circuit 206 to turn on the power supply state display lamp 203. In addition, the camera-side CPU 200 supplies the display control circuit 206 with a clock signal and a data signal necessary for the display of the liquid crystal monitor 202 and supplies power for driving the liquid crystal to display the liquid crystal monitor 202.
On the other hand, the camera-side CPU 200 is turned off when power is not supplied from the DC-DC converter 204. At this time, since the lamp lighting signal and power supply from the camera side CPU 200 to the display control circuit 206 are stopped, the power supply state display lamp 203 is turned off. At the same time, since the supply of signals and power necessary for the display of the liquid crystal monitor 202 from the camera side CPU 200 to the display control circuit 206 is also stopped, the display of the liquid crystal monitor 202 is stopped.

  Next, the operation of the circuit shown in FIG. 2 will be described. In FIG. 2, when both the state detection switch S1 and the power switch S2 are open, that is, when the lens barrel 101 is in the photographing position and the power switch S2 is in the on position, the voltage V1 of the resistor R1 is at the low level. Thus, since the base current flows through the base (B) of the transistor Tr1, the current from the power supply unit 205 flows from the emitter (E) to the collector (C). This current is amplified by the DC-DC converter 204 and supplied to the camera side CPU 200 as electric power. The current amplified by the DC-DC converter 204 is supplied as electric power to the lens side CPU 111 via the contact C.

  Thereby, the lens side CPU 111 and the camera side CPU 200 are activated, and communication is performed between these CPUs via the contact point B. Here, a data signal, a clock signal, a control signal, and the like for performing AF and AE are transmitted and received. Thus, when the lens barrel 101 is in the shooting state and the power switch S2 is in the ON position, shooting by the camera system 100 is possible.

  In FIG. 2, when the state detection switch S1 is closed and the power switch S2 is open, that is, when the lens barrel 101 is in the retracted state and the power switch S2 is in the ON position, a current is supplied to the resistor R2. Since only flows, the voltage V1 of the resistor R1 becomes a high level. For this reason, the base current does not flow to the base (B) of the transistor Tr1, and the current from the power supply unit 205 does not flow from the emitter (E) to the collector (C). In this case, since the DC-DC converter 204 is turned off, the camera-side CPU 200 is also turned off. When the camera-side CPU 200 is turned off, the lamp lighting signal and power supply to the display control circuit 206 are stopped, so that the power supply state lamp 203 is turned off. At the same time, the display on the liquid crystal monitor 202 is also stopped. Thus, when the lens barrel 101 is in the retracted state, even if the power switch S2 is in the on position, shooting by the camera system 100 becomes impossible.

  In FIG. 2, when the state detection switch S1 is open and the power switch S2 is closed, that is, when the lens barrel 101 is in the photographing state and the power switch S2 is in the off position, a current flows through the resistor R2. Since only flows, the voltage V1 of the resistor R1 becomes a high level. For this reason, the base current does not flow to the base (B) of the transistor Tr1, and the current from the power supply unit 205 does not flow from the emitter (E) to the collector (C). In this case, as described above, the DC-DC converter 204 and the camera-side CPU 200 are turned off, and the lamp lighting signal and power supply to the display control circuit 206 are also stopped, so that the power status display lamp 203 is turned off. At the same time, the display on the liquid crystal monitor 202 is also stopped. Thus, even when the lens barrel 101 is in the shooting state, if the power switch S2 is in the off position, shooting by the camera system 100 is disabled.

  In FIG. 2, even when the state detection switch S1 is closed and the power switch S2 is also closed, that is, when the lens barrel 101 is in the retracted state and the power switch S2 is closed, the current flows through the resistor R2. Since it only flows, the voltage V1 of the resistor R1 is at a high level. For this reason, the base current does not flow to the base (B) of the transistor Tr1, and the current from the power supply unit 205 does not flow from the emitter (E) to the collector (C). In this case, as described above, the DC-DC converter 204 and the camera-side CPU 200 are turned off, and the lamp lighting signal and power supply to the display control circuit 206 are also stopped, so that the power status display lamp 203 is turned off. At the same time, the display on the liquid crystal monitor 202 is also stopped. Thus, even when the lens barrel 101 is in the retracted state and the power switch S2 is also in the off position, shooting by the camera system 100 is impossible.

  FIG. 3 is an explanatory diagram showing combinations of the above-described two switch states and the power supply state of the camera system 100. As shown in FIG. 3, in the camera system 100 according to the first embodiment, only when the lens barrel 101 is in the shooting state (the state detection switch S1 is in the off position) and the power switch S2 is in the on position. Is possible. When the photographing is possible, the power state display lamp 203 is turned on, and when the photographing is impossible, the power state display lamp 203 is turned off.

According to 1st Embodiment mentioned above, there exist the following effects.
(1) When the power supply unit 205 supplies power to the imaging unit 201 and the state detection switch S1 detects that the lens barrel 101 is in the retracted state, the power supply unit 205 supplies power. Therefore, the user can turn off the power of the camera system 100 only by putting the lens barrel 101 in the retracted state. Therefore, it is possible to improve the operability when the lens barrel that can be stored with the lens barrel length shortened is attached. Further, by turning off the power supply under the above-described conditions, it is possible to prevent the battery from being consumed unnecessarily by forgetting to turn off the power supply after the lens barrel 101 is in the retracted state.
(2) Since the state detection switch S1 is a switch that is displaced to the first / second state in accordance with the distance between the optical system including the front group lens L1 and the rear group lens L2 and the imaging unit 201, the lens barrel It is possible to detect whether 101 is in the storage state or the photographing state with a simple configuration. Further, since the configuration as a switch is simple, it can be stably operated over a long period of time.
(3) In (1) above, when the state detection switch S1 cuts off the supply of power by the power supply unit 205, the state detection switch S1 is displaced from the second state to the first state to supply power. Since the operation is resumed, the user can turn on the power of the camera system 100 without operating the power switch S2 by extending the lens barrel 101 from the housed state to the photographing state.
(4) Since the circuit including the transistor Tr1 is configured to cut off / restart the power supply by the power supply unit 205 depending on whether the lens barrel 101 is in the housed state or the photographing state, is the lens barrel 101 in the housed state? The power can be turned on / off according to the shooting state with a simple configuration.
(5) When the power switch S2 is in the on position and the lens barrel 101 is extended, the power status indicator lamp 203 is lit. If the power switch S2 is in the off position or the lens barrel 101 is in the retracted state, the power Since the status display lamp 203 is turned off, the user can easily identify whether the photographing is possible or not by turning on / off the power status display lamp 203.
(Second Embodiment)

  FIG. 4 is a circuit diagram showing a configuration of a camera system 100A in the second embodiment. In FIG. Parts equivalent to those in FIG. 2 are denoted by the same reference numerals.

  In the camera body 130 </ b> A of the present embodiment, a power control unit 207 is connected between the DC-DC converter 204 and the power unit 205. The power control unit 207 is connected to the state detection switch S1, the power switch S2, and the display control circuit 206. The power supply control unit 207 is a circuit that selectively controls the supply of power by the power supply unit 205 according to the state of the state detection switch S1 and the state of the power supply switch S2, and includes a microprocessor. As will be described later, when the power switch S2 is switched to the ON position, the power controller 207 supplies a message display signal and power to the display control circuit 206 when the state detection switch S1 is in the second state. To do. When the power switch S2 is in the ON position and the state detection switch S1 is in the first state, power is supplied from the power control unit 207 to the camera side CPU 200 via the DC-DC converter 204.

  The power supply control unit 207 supplies power to the imaging unit 201 from the power supply unit 205, and the interval between the imaging unit 201 and the optical system including the front group lens L1 and the rear group lens L2 is set by the state detection switch S1. When it is detected that the second interval is reached, that is, when the state detection switch S1 is in the second state, it functions as a shut-off means for shutting off the power supply by the power supply unit 205. Further, in the function as the shut-off means, the power control unit 207 is configured such that the state detection switch S1 is the second switch when the power supply unit 205 cuts off the power supply while the power supply unit 205 is supplying power. The supply of electric power is resumed by shifting from the state to the first state.

  In addition, when the power switch S2 is switched to the ON position, the power control unit 207 displays the display control circuit when the state detection switch S1 is in the second state, that is, when the lens barrel 101 is in the retracted state. A message display signal and power as a control signal are supplied to 206, and a message such as “lens is housed” is displayed on the liquid crystal monitor 202. This message is for notifying the user that the power is off because the lens barrel 101 is in the retracted state even when the power switch S2 is switched to the on position. While this message is displayed, the power of the camera system 100 remains off even if the power switch S2 is switched to the on position.

  That is, when the power switch S2 is switched to the ON position, the power supply control unit 207 (and the liquid crystal monitor 202) has a second interval between the optical system including the front group lens L1 and the rear group lens L2 and the imaging unit 201. When it is detected that the interval is reached, it functions as a notification means for notifying the user that the lens barrel 101 is in the retracted state.

  Further, the power control unit 207 is configured such that when the power switch S2 is switched to the on position and the state detection switch S1 is in the first state, that is, when the lens barrel 101 is in the photographing position, the power supply unit 205 Is supplied to the DC-DC converter 204. In this case, the power supply of the camera system 100 is turned on. At the same time, the power supply control unit 207 stops supplying the message display signal and power to the display control circuit 206.

  Next, the operation of the power control unit 207 will be described. FIG. 5 is a flowchart showing a processing procedure by the power supply control unit 207 from the state where the power supply by the power supply unit 205 is cut off to the start of power supply.

  First, the power control unit 207 determines whether or not the power switch S2 has been switched to the on position (S101). If “No” here, the process returns to the determination in step S101, and if “Yes”, it is determined whether or not the state detection switch S1 is in the second state, that is, whether or not the lens barrel 101 is stored (S102). If No here, the power supply control part 207 will supply the electric power by the power supply part 205 to the DC-DC converter 204 (S103). As a result, power is supplied to the camera-side CPU 200 and the lens-side CPU 111, and various signals and data are communicated between the CPUs. Further, when a lamp lighting signal and power are supplied from the camera-side CPU 200 to the display control circuit 206, the power supply state display lamp 203 is lit. On the other hand, if the determination in step 102 is Yes, a message display signal and power are supplied to the display control circuit 206, and the power supply is off because the lens barrel 101 is stored in the liquid crystal monitor 202. Is displayed (S104). At this time, power is supplied to the display control circuit 206, but the power supply state display lamp 203 is turned off by the display control circuit 206. Thereafter, the power supply control unit 207 proceeds to processing of a flowchart shown in FIG.

  FIG. 6 is a flowchart showing a processing procedure by the power supply control unit 207 from the state in which the power from the power supply unit 205 is being supplied until the power supply is cut off.

  First, the power control unit 207 determines whether or not the power switch S2 has been switched to the off position (S201). If No here, the power supply control unit 207 determines whether or not the state detection switch S1 is in the second state (S202). Here, if it is No, it will return to determination of step S201. On the other hand, if the determination in step S202 is Yes, the power supply control unit 207 cuts off the supply of power by the power supply unit 205 to the DC-DC converter 204 (S203). In this case, even if the power switch S2 is in the ON position, the power status display lamp 203 is turned off and the display on the liquid crystal monitor 202 is also stopped. Also, if the determination in step 201 is Yes, the process proceeds to step S203, and the power supply by the power supply unit 205 is cut off as described above. Thereafter, the power supply control unit 207 proceeds to the process of the flowchart shown in FIG.

According to 2nd Embodiment mentioned above, there exists an effect equivalent to (1)-(3), (5) of 1st Embodiment. Furthermore, according to 2nd Embodiment, there exist the following effects.
(6) Since the power supply control unit 207 selectively controls the power supply by the power supply unit 205 in accordance with the state of the state detection switch S1 and the state of the power supply switch S2, the lens barrel 101 is The power can be turned on / off according to the storage state or the photographing state by a simple program.
(7) When the power switch S2 is switched to the ON position, if the state detection switch S1 is in the second state (ON position), a message such as “Lens is stored” is displayed on the LCD monitor 202. Since the display is made, the user can easily understand the reason why the power is not turned on even though the power switch S2 is switched to the on position.
(Deformation)

Without being limited to the embodiment described above, the present invention can be variously modified and changed as described below, and these are also within the scope of the present invention.
(1) The state detection switch S1 is not limited to the position shown in the figure as long as it can detect that the lens barrel 101 is in the retracted state and does not affect the optical performance. May be arranged. Further, the state detection switch S1 may be constituted by a sensor.
(2) As in the second embodiment, according to the state of the state detection switch S1 and the state of the power switch S2, the power control for selectively controlling the power supply by the power unit 205, and the power switch S2 A normal power supply control that controls on / off of the power supply only by the state may be switched according to the user's selection.
(3) In the above embodiment, an example in which the present invention is applied to an interchangeable lens digital camera has been described. However, the present invention is not limited to this, and can be applied to a lens integrated camera, a video camera, and the like. .

  Moreover, although the said embodiment and modification can be used in combination suitably, since the structure of each embodiment is clear by illustration and description, detailed description is abbreviate | omitted. Furthermore, the present invention is not limited by the embodiment described above.

  100, 100A: camera system, 101: lens barrel, 111: lens side CPU, 130, 130A: camera body, 200: camera side CPU, 201: imaging unit, 202: liquid crystal monitor, 203: power status display lamp, 204 : DC-DC converter, 205: power supply unit, 206: display control circuit, 207: power supply control unit, Tr1: transistor, S1: state detection switch, S2: power switch

The present invention relates to imaging equipment.

An image pickup apparatus in which an interchangeable lens capable of switching between a first state in which an optical system is housed in a predetermined position and a second state in which the optical system is moved from the predetermined position is detachable, and displays information A power supply unit that supplies power to the display unit, a switch that switches whether the power supply unit supplies the power, and whether the interchangeable lens is in the first state. A control unit that displays information indicating that the first state is displayed on the display unit when it is determined that the switch is in the first state when the switch is switched to supply the power; It was set as the structure provided.

According to the present invention it is possible to provide an imaging equipment having an improved operability when using the lens barrel length shorter by retractable lens barrel.

Claims (6)

An imaging device in which an interchangeable lens capable of switching between a storage state in which an optical system is stored in a predetermined position and a shooting state in which the optical system is extended from the predetermined position is detachable,
An image sensor that captures an image formed through the mounted interchangeable lens;
A determination unit for determining whether or not the interchangeable lens is in the retracted state;
A power supply for supplying power to the image sensor;
A blocking unit that blocks supply of power to the imaging element by the power supply unit when the determination unit determines that the storage unit is in the housed state while the power supply unit supplies power to the imaging element. An imaging apparatus comprising: The imaging device according to claim 1,
The determination unit determines that the interchangeable lens is in the retracted state based on a signal from the interchangeable lens. In the imaging device according to claim 1 or 2,
A detector that detects the storage state of the interchangeable lens;
The determination unit determines that the interchangeable lens is in the retracted state based on detection by the detection unit. An interchangeable lens having an optical system and capable of switching between a storage state in which the optical system is stored in a predetermined position and a photographing state in which the optical system is extended from the predetermined position;
An image pickup device that picks up an image formed by the optical system, a power supply unit that supplies power to the image pickup device, and the optical system that is housed while the power supply unit supplies power to the image pickup device. When the power supply unit is in a state, the power supply unit can be mounted on an imaging device including a blocking unit that blocks power supply to the imaging element,
It is a detection provided to the imaging device for cutting off power supply to the imaging device by the blocking unit, and includes a detecting unit that detects that the optical system is in the housed state. interchangeable lens. The interchangeable lens according to claim 4,
The imaging element of the imaging apparatus to which the interchangeable lens is attached captures an image by the optical system in a state of being arranged at a first interval in the optical axis direction of the optical system with respect to the optical system. ,
The detection means detects a state in which the optical system is disposed at a first interval from the imaging element in a lens barrel that holds the optical system movably as the imaging state, and the optical system Is a switch that detects a state in which the imaging element is disposed at a second interval narrower than the first interval as the storage state. A lens barrel that can be switched between a storage state in which the optical system is stored in a predetermined position and a photographing state in which the optical system is extended from the predetermined position;
An image sensor that captures an image formed through the lens barrel;
A power supply for supplying power to the image sensor;
A rotating member that allows a user to turn around the lens barrel about the optical axis of the optical system, and is an operation member that can be operated to switch the optical system between the housed state and the photographing state When,
A determination unit that determines that the state of the optical system is switched to the storage state by the operation member;
When the power supply unit supplies power to the image sensor and the determination unit determines that the power supply unit is switched to the housed state, the power supply unit shuts off power supply to the image sensor. And an imaging device.

Images