JPH0876212A - Image pickup device - Google Patents

Abstract

PURPOSE: To provide a camera capable of dispensing with an electrical connection means for the normal supply of power to a lens holding frame from a camera main body by dispensing with the normal supply. CONSTITUTION: The camera having a main battery 20 on the side of the camera main body 12 is provided with a lens holding frame B 5 supported movably with respect to the main body 12, a shutter mechanism 7 arranged in the lens holding frame B 5, a lens driving mechanism for focusing 22, an actuator 11 for driving the lens holding mechanism, a sub-battery 13 supplying the power to the actuator and a charging means charging the sub-battery 13 arranged in the lens holding frame B 5 from the main battery 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup device, more specifically,
The present invention relates to an imaging device having a main battery and a sub battery.

[0002]

2. Description of the Related Art Conventionally, in a camera disclosed in Japanese Utility Model Laid-Open No. 61-206943 and a general camera, when a lens holding frame and an image pickup apparatus main body are electrically connected, a zooming operation of the camera or In order to absorb the stroke of the lens holding frame that moves in the optical axis direction during the focusing operation, a flexible printed circuit board (hereinafter referred to as FPC) is applied as the connecting means. This method connects the ones whose positions are relatively changed by utilizing the elastic deformation of the FPC, and has the advantage that a circuit pattern can be formed on the FPC as well as a normal hard substrate. Is to have.

Therefore, when arranging an elastically deformable flexible substrate in a limited space in the lens barrel, it is necessary to efficiently avoid interference with other members and suppress the occupied space of the FPC. . For this reason, measures are taken such as providing FPC position control means that moves integrally with the lens barrel at the bent portion of the flexible substrate in the general arrangement of the flexible substrate as shown in the sectional view of the lens barrel in FIG. Some have. Note that FIG.
2, the FPC 103 is a lens holding frame 102 that moves back and forth with a CPU 104 incorporated in the imaging apparatus main body 101.
The electrical connection between them is made. Further, in the figure, reference numeral 10
Reference numeral 5 denotes a battery, and 106 denotes a drive motor.

Further, the camera disclosed in Japanese Utility Model Laid-Open No. 57-9914 discloses a focusing drive driven for a focusing operation in a lens holding frame which moves in the optical axis direction in accordance with the zooming operation of the camera. When a lens driving mechanism, a shutter driving mechanism, or the like is built in, the driving control thereof is performed by the power of an actuator fixed to the image pickup apparatus main body side. That is, the actuator fixed to the image pickup apparatus main body side is also driven by the power source (battery) fixed to the image pickup apparatus main body side, and the power thereof is transmitted to the drive mechanism in the lens holding frame. In this case, in order to reliably transmit the power regardless of the displacement of the lens holding frame with respect to the image pickup apparatus main body in the optical axis direction, the power transmission is performed by levers, links, gears, particularly long span gears having a long mesh in the optical axis direction. It is carried out by the mechanism of.

In the case of the image pickup apparatus having the above-mentioned structure, it is not necessary to incorporate an actuator for driving the driving mechanism in the lens holding frame into the lens holding frame, and the lens holding frame which is a movable member can be made compact and lightweight. To be done. Further, there is no need to supply electric power for driving the actuator to the lens holding frame from the image pickup apparatus main body, and there is an advantage that the number of electrical connection lines is reduced or unnecessary.

Further, in the camera disclosed in Japanese Unexamined Patent Publication No. Sho 62-100744, in order to transmit information of the photographing lens to the camera body side, two kinds of segments having large and small reflectance are on the lens side and face the body. Provide a plurality on the surface to be used. Then, on the main body side, a light emitting element and a light receiving element as a photo reflector are arranged corresponding to each segment. With the above configuration, in the present camera, the binarized signal corresponding to the magnitude of the reflectance of each segment can be transmitted from the lens side to the camera body side without using an electrical connecting means.

The camera disclosed in Japanese Patent Laid-Open No. 5-341370 includes a lens barrel which is inserted into a mount portion of the camera body and is movably arranged in the optical axis direction with respect to the mount portion, and a camera body side. A light emitting element or a light receiving element is arranged on both sides, and it is possible to perform signal transmission between the camera body and the lens barrel.

[0008]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the camera image pickup device disclosed in Japanese Unexamined Patent Publication No. 1-206943, in which the FPC is applied as the connecting means,
The C plate is constantly deformed with the movement of the lens holding frame, and reflects off-axis rays within the lens barrel.
The adverse effects on the optical performance such as flare and ghost are unavoidable. Further, the connection by the FPC is intended to absorb the relative position change between the movable lens holding frame and the image pickup apparatus main body by the deformation (deflection) of the FPC, and the repeated stress is not generated in the bent portion of the FPC. Unavoidable.

Therefore, it is necessary to secure a certain space such as a bent portion in order to avoid the occurrence of disconnection due to the fatigue fracture of the substrate, which hinders the downsizing of the lens barrel. further,
It is desirable to provide a flexible position control means to prevent interference with other members, but this causes a size increase and cost increase.

As described above, in recent years, the movement stroke of the lens holding frame has tended to become longer with the increase in the magnification of the zoom lens. On the other hand, the electrical connection between the lens holding frame and the image pickup apparatus main body has been described above. As described above, there are many problems and it is becoming difficult to carry out using FPC.

Further, in the case of the camera disclosed in Japanese Utility Model Laid-Open No. 57-9914, the electric connection between the lens holding frame and the image pickup apparatus main body becomes unnecessary, but the input member does not transmit the power. Therefore, the entire lens barrel becomes large due to the space of the power transmission input member. In particular, when the movement stroke of the lens holding frame becomes large due to the high zoom ratio, etc., the connecting portion becomes large in order to secure the mechanical connection between the lens holding frame and the imaging device main body, and the dead inside the lens barrel is caused. There are problems such as an increase in space and deterioration of position control accuracy during driving.

Further, in the case of the camera disclosed in Japanese Patent Laid-Open No. 62-100744, it is good to transmit the information peculiar to the taking lens to the camera body side. For example, the camera body is made the state change on the lens side as information. In order to transmit to the side, the reflectance of each segment cannot be fixed and it is necessary to change the reflectance of each segment. In this case, the segment part becomes considerably expensive. Further, although it is sufficient to determine the type of lens, for example, when transmitting a large amount of information for focusing lens drive control or shutter drive control, the number of segments and the corresponding light emission The number of elements and light receiving elements increases, resulting in an increase in space and cost.

In the case of the camera disclosed in Japanese Unexamined Patent Publication No. 5-341370, signal transmission between the lens barrel and the camera body is performed by communication, but an electric power is supplied to supply power to the lens barrel. The connecting means is separately required. Therefore, it is still necessary to make electrical connection while absorbing the stroke of relative movement between the lens barrel and the camera body, and it becomes structurally difficult as the movement stroke increases. Also,
When applying to a case where some lens groups further move in the optical axis direction inside the lens barrel that moves relative to the camera body, such as the focusing operation in the zoom lens barrel, the lens barrel Wiring will be required separately.

The present invention has been made to solve the above-mentioned problems, and a first object of the present invention is to eliminate the need for constant power supply from the image pickup apparatus main body to the lens holding frame, An object of the present invention is to provide an image pickup apparatus capable of eliminating the constant electrical connection means for that purpose. A second object of the present invention is to charge the sub-battery built in the lens holding frame from the main battery on the main body side in a predetermined state, and to make the electrical connection means for charging small and simple. It is an object of the present invention to provide an image pickup device that can be made compact and can also reduce the size of a sub battery. A third object of the present invention is to provide an image pickup apparatus which can always control the charging voltage of the sub-battery to an optimum value, shorten the charging time, and avoid the trouble in photographing.

[0015]

Means and Actions for Solving the Problems First of the Invention
In the image pickup device having a main battery as a main power source on the main body side, a lens holding frame supported movably in the optical axis direction with respect to the main body of the image pickup device, and a drive arranged on the lens holding frame. A shutter mechanism including a driving actuator, at least one of a focusing lens driving mechanism including a driving actuator, and a sub-battery arranged in the lens holding frame and supplying electric power to the actuator. In the imaging device, the sub-battery drives the actuator to operate the shutter mechanism and / or the focusing lens drive mechanism.

The second image pickup device of the present invention is different from the first image pickup device in that when the lens holding frame is in a predetermined position, the main battery arranged in the image pickup device body is changed to the lens holding frame. A charging means for charging the arranged sub-battery is provided. In the image pickup apparatus, the sub battery is charged by the main battery.

A third image pickup device of the present invention is an image pickup device having a main battery as a main power source on the main body side, and a lens holding frame supported movably in the optical axis direction with respect to the main body of the image pickup device, and the above lens. An actuator that drives at least one of the shutter mechanism and the focus lens driving mechanism provided in the holding frame, and a communication unit that performs communication for signal transmission between the lens holding frame and the imaging device body,
A sub-battery arranged in the lens holding frame for supplying electric power to the actuator; a charging means for charging the sub-battery with a main battery arranged in the imaging device body at a predetermined position of the lens holding frame; Voltage detection means for detecting the voltage of the sub-battery. In the image pickup device, the voltage of the sub-battery is detected by the voltage detection means.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing a mechanism main part of a camera which is an image pickup apparatus showing a first embodiment of the present invention. In addition,
The cross section of the upper half of FIG. 1 shows the wide state, and the cross section of the lower half shows the tele state.

The structure of the camera of this embodiment will be described with reference to FIG. 1. The lens unit 50, which is the lens barrel of the camera, includes a cam ring 8 rotatably supported by the camera body 12 and lens holding frames. The first, second, and third lens groups 1, 2, and 3 held by the first lens group 1 and the third lens group 3 are held by a common lens holding frame A4. Along with the doubling operation, they are integrally driven back and forth in the optical axis direction. The second lens group 2 includes a lens holding group B.
It is held by a lens holding frame C6 that is supported so as to be movable in the optical axis direction with respect to 5, and is driven back and forth in the optical axis direction. In the lens holding frames A4 and B5, cam follower portions 51 and 52 are provided at three locations on the outer circumference, and the cam follower portions are provided at three locations corresponding to the respective frames provided on the inner circumference side of the cam ring 8. It is supported by being fitted with the cam groove of.

When the cam ring 8 is rotated by the zoom driving motor 9 fixedly supported by the camera body 12 via the zoom driving force transmitting portion 10, the cam ring 8 is rotated according to the cam shape of each cam groove. Lens holding frame A and lens holding frame B5
However, it is driven back and forth in the optical axis direction, and the first lens group 1 and the third lens group 3 perform a zooming operation.

Further, as described above, the lens holding frame C6 holding the second lens group 2 is supported so as to be movable in the optical axis direction with respect to the lens holding frame B5, and the lens holding frame B5,
The focusing operation by the second lens group 2 is performed by the relative position change of the lens holding frame C6. The shutter mechanism 7 is integrally fixed to the lens holding frame B5 of the lens unit 50.

Then, in the lens holding frame B5, the lens holding frame C6 by the focusing lens driving mechanism 22 is provided.
The lens drive for focusing and the shutter drive for exposure control of the shutter mechanism 7 are also driven by the drive actuator 11 integrally fixed to the lens holding frame B5, and the lens drive and the shutter drive. Is performed by a driving force transmission mechanism (not shown) including the power switching mechanism 21 (FIG. 2).

The lens holding frame B5 on the lens unit 50 side has a sub-battery 13 which is a rechargeable secondary battery for supplying electric power to the driving actuator 11.
And a light emitting element 18a provided on the camera body 12 side, which is a communication unit for performing optical communication for transmitting information.
The light emitting element 14a of the communication means for the optical element 18 including the light receiving element 18b (FIG. 2), the optical element 14 including the light receiving element 14b (FIG. 2), and the signal processing sub CPU 47 (FIG. 2)
The charging circuit unit 19 is a charging unit when charging from the electric circuit 15 including the
Connection terminal 17 on the camera body side for electrical connection to be connected with
A connection terminal 16 and the like for making electrical connection to is provided.

Next, the outline of the lens driving operation and charging operation of the camera of this embodiment will be described with reference to the control system diagram of FIG. 2 and FIG. In the non-use state of the camera in which the main switch of the camera is off, each lens group is reset to the wide end position as shown in the upper half side cross section of FIG. 1, and the lens holding frame B5 is It is in a position closest to the camera body 12.

Incidentally, the detection of the wide end position in the reset operation to the wide end is performed, for example, as shown in the perspective view of the cam ring portion of FIG. It can be detected by reading the end of the reflection plate 53 attached to the position with the reflection type optical sensor 54 provided in the camera body 12.

At this time, at the wide end position only, the lens holding frame side connecting terminal 1 is a connecting means for electrically connecting the lens holding frame B5 and the camera body 12 side.
6. The camera body side connection terminal 17 is mechanically contacted, and the sub battery 13 is charged from the main battery 20 via the charging circuit 19 until the sub battery 13 is fully charged. .

Then, after the film is loaded into the camera, shooting of the camera is started and a zoom operation is performed,
The connection means 16 and 17 are brought into a non-contact state, and the main battery 20 is no longer charged to the sub battery 13.

The electric power stored in the sub-battery 13 by the above charging is the electric power required to drive the focusing lens and the shutter by the actuator 11 when photographing one film on the assumption that a maximum of 36 sheets are taken, In addition, the electric power required for communication with the camera body 12 and the electric power consumed by the electric circuit in the lens holding frame B5 including the signal processing unit (sub CPU 47) can all be supplied from the sub battery 13. is there. That is, even if the camera starts shooting after charging and the shooting is continued, the electric power accumulated in the sub-battery 13 is used for focusing operation / shutter driving etc. necessary for shooting one film. The power of can be covered.

Of course, in the zoom operation during the shooting operation, when the film is set at the wide end position, the film 1
By turning off the power of the camera once without shooting all the images at once,
When the zoom position is also automatically reset to the wide end position, the power consumed by the sub battery 13 can be supplied from the main battery 20.

It is also conceivable that the camera may be left without being turned off in a state of being set to a zoom position other than the wide end, but if left in this state for a long time, the sub battery 13 There is a problem of power reduction due to self-discharge. As a countermeasure, the camera's auto-reset function, which is often applied as a power saving measure for the camera, that is, if the camera is left on for a predetermined time or longer without any external operation, it automatically By providing a function of turning off the power and resetting the zoom, it is possible to prevent the camera from being left uncharged for a long time.

The signal processing section including the sub CPU 47 provided in the lens holding frame B5 receives light from the signal processing section including the main CPU 35 provided on the camera body 12 side via the optical elements 18 (18a, 18b). The focus lens drive information and the shutter drive information transmitted by communication are fetched via the optical element 14 (14a, 14b). And
Focusing lens drive according to the shooting sequence of the camera,
The drive actuator 11 is drive-controlled to drive the shutter.

The rotational force of the actuator 11 during driving is selectively transmitted to the cam 22a as the focusing lens driving mechanism 22 or the shutter driving mechanism 29 by the power switching mechanism 21. The focusing operation is performed by pressing the pin 6a of the lens holding frame C6 against the spring 24 by the cam 22a of the lens driving mechanism 22 to move the lens holding frame C6 forward and backward along the optical axis direction. Be seen. The spring 24 urges the pin 6a so as to always contact the lens driving cam 22. To control the drive position of the lens holding frame C6, the output signal of the position detection sensor 23 of the lens drive cam 22 is set to the sub CPU 4 of the signal processing unit.
It is done by capturing in 7 and giving feedback.

The shutter mechanism 7 comprises a shutter blade 26 and a shutter drive lever 25 for driving the shutter blade 26,
For the drive, the shutter blades 26 are driven by the actuator 11 via the power switching mechanism 21. The drive position control of the shutter blades 26 is performed by feeding back the output signal of the position detection sensor 27 of the shutter drive lever 25 to the sub CPU 47 of the signal processing unit.

Main CP provided in the camera body 12
The signal processing unit including U35 is also a distance measuring sensor 43 provided in the camera body 12, a photometric sensor 37,
Further, focus lens drive information and shutter drive information are calculated based on information obtained from various mode input switches (SW) 56 to 60 such as flash light emission information, and the lens holding frame B5 side is operated according to the shooting sequence of the camera. The signal is transmitted to the sub CPU 47 of the signal processing unit. In addition to the above, the main CPU 35 of the signal processing unit, of course, also controls the light emission of the strobe 55, zoom drive, film winding, rewinding, display in the finder, and the like.

When the connection terminals 16 and 17 which are the electrical connection means between the lens holding frame B5 and the camera body 12 are in the connected state, the charging circuit 17 supplies the charging power for the sub-battery 13. The main battery 20, in addition, charges the strobe light emitting capacitor 61, supplies power to the zoom drive motor 9 (FIG. 1), winds the film,
It also supplies power to a rewinding motor (not shown).

FIG. 4 is a block diagram of the camera of this embodiment, and each control element of this camera will be described with reference to this drawing. The power SW (switch) 56 is a switch which, when turned on, causes the main CPU 35 to start sequential control according to a program stored in a ROM provided therein.

The feeding motor drive circuit 36 is composed of a film 62.
It is a drive circuit for winding and rewinding. Photometer 37
Converts the intensity of the reflected light from the subject into an electric signal and stores the level in the RAM in the main CPU 35. The battery check circuit 40 measures the voltage level of the main battery 20 in order to guarantee the operation of the camera.
When the voltage becomes equal to or lower than the predetermined value, the main CPU 35 locks the operation of the camera.

The strobe charging circuit 41 charges the high voltage capacitor 61 (FIG. 2) for strobe light emission. Also,
The strobe emission control circuit 42 causes the strobe 55 to emit light at a timing described later. The distance measuring unit 43 receives the reflected light of the infrared light projected on the subject and measures the distance to the subject from the light receiving angle.

The zoom motor drive circuit 39 raises / lowers the zoom lens in accordance with the operation of the zoom up SW (switch) 58 and the zoom down SW (switch) 59. It also retracts and extends.

The communication circuit 38 is a communication means on the camera body 12 side, and sends various commands in addition to focus lens extension amount data calculated by the main CPU 35, shutter open time data, and the like by the optical element 18. This signal is transmitted to the communication circuit 4 including the optical element 14 on the lens holding frame B5 side.
5 is transmitted to the sub CPU 47 in the lens holding frame B5. On the contrary, the information from the sub CPU 47 is
It is transmitted by the communication circuit 45, received by the communication circuit 38, and transmitted to the main CPU 35.

The sub-battery charging circuit 19 is a charging means, and charges the sub-battery 13 which covers the electric power in the lens holding frame B5 from the main battery 20 on the camera body 12 side. The charging is performed when the zoom lens is at a predetermined position, for example, the retracted position or the wide end.

Sub CPU 47 in lens holding frame B5, communication circuit 45, lens drive circuit 48, shutter drive circuit 4
All 9 are supplied with power from the sub-battery 13.
The sub CPU 47 starts the sequence control according to the command received from the main CPU 35. The focus lens is driven by the lens drive circuit 48, but the amount of extension depends on the data received from the main CPU 35. Similarly, the shutter mechanism 7 is also driven by the shutter drive circuit 49 according to the data from the main CPU 35.

5 and 6 are flowcharts of the battery loading process of the camera of this embodiment. The battery loading operation will be described with reference to this figure. When the main battery 20 is loaded in the camera, the main CPU 35 is reset to execute the program stored in the internal ROM. As shown in FIG. 5, in step S1, if the power SW 56 is checked and turned on, the camera operation is controlled in accordance with step S2 and subsequent steps. If it is off, the main CPU 35 shifts to the stop mode and enters the power saving mode in step S8. In this state, when the power SW 56 is turned on, the main CPU 35 is restarted and the program is executed from step S1.

In step S2, the battery voltage is checked. In this check, in order to prevent the system from running away due to a drop in battery voltage, the power supply drop voltage when a large current is passed through the dummy load is A / D converted and input to the main CPU 35.
If the voltage is lower than a predetermined voltage, the system is locked.

In step S3, the lens is extended from the retracted position to the wide end position in preparation for photographing. In step S4, the timer setting and the start operation for performing the above-mentioned automatic reset are performed. Step S5
Then, the power SW 56 is checked again, and if it is off, the process branches to step S7, the lens is stored in the retracted position, and then the power saving mode is entered.

In step S6, the automatic reset timer started in step S4 is checked.
This timer is for shifting to the power saving mode when the camera is not operated for a predetermined time. When the camera is operated, the timer is always updated in step S4, but if nothing is operated, the time is up, the lens is housed in step S7, and the power saving mode is entered. In this state, the main battery 20 on the camera body 12 side and the sub-battery 13 in the lens holding frame B5 are electrically connected and charged. In step S9, the charging voltage of the strobe 55 is checked, and if the voltage required for light emission is not reached, the strobe light emitting capacitor 61 is charged in step S10.

In the subsequent processes, as shown in FIG. 6, in step S11, the rear cover SW (switch) 60 interlocking with the rear cover of the camera is monitored, and the rear cover is changed from the open state to the closed state. When it is changed to, it is determined that the film is loaded, and in step S23, the same process as in step S2 is performed in the battery check for guaranteeing the idling operation, and then the film is fed by a predetermined amount in step S24. To do.

If there is no change in the opening / closing of the rear lid, step S
In step 12, the release SW (switch) 57 for starting shooting is determined. When the release SW 57 is turned on, a battery check is performed, and then distance measurement and photometry are performed in step S14. In the distance measurement, as described above, infrared light is projected toward the subject, and the distance to the subject is calculated from the angle of the reflected light. Further, the data is converted into the lens extension amount. On the other hand, in photometry, the brightness of the subject is measured, the film sensitivity is taken into consideration, and the shutter time is converted. If the brightness is equal to or lower than the predetermined brightness at this time, the flash emission determination is performed.

In step S15, the data calculated in step S14 is transmitted to the sub CPU 47 on the lens holding frame B5 side by optical communication. The details will be described later together with the exposure processing in step S16.

In step S17, the photographed film is
In the process of winding the frame, at this time, step S1
When it is not possible to wind one frame in step 8, it is determined that the film is finished, and the rewinding operation is started in step S19.

When it is determined in step S12 that the release SW 57 is off, the zoom up SW (switch) 58 or the zoom down SW (switch) 59 is checked in step S20. The SW58,
Alternatively, if 59 is turned on, a zooming operation according to the direction of the zoom SW is executed in step S22. The above processing is a schematic operation by the main CPU 35 on the camera body 12 side.

On the other hand, charging OK processing as the operation of the sub CPU 47 in the lens holding frame B5 at this time will be described with reference to the flowchart of FIG. The sub CPU 47 operates according to the program of its internal ROM, similarly to the main CPU 35, by the power of the sub battery 13. Normally, the power saving mode is entered in step S30, but when a communication signal from the main CPU 35 is input,
The processing from step S32 onward is executed.

The sub CPU 47 is the main CPU 35.
Are subordinate to the main CPU 35.
Is processed according to the command sent from the communication. Step S32 is a process of receiving the command. The optical communication protocol of this embodiment will be described later.

The processing after step S33 is the same as step S33.
This is a branch process in accordance with the command received at 32. For example, when it is determined in step S33 that the received command is exposure, an exposure sequence, that is, lens extension, exposure, lens extension is executed in step S34. If it is determined that the received command is the AE data transfer command in step S35, the data is received in step S36. In step S37, if the received command is an AF data transfer command, the AF data is received in step S38.

In the camera of this embodiment, since the power saving mode is entered for each communication, the battery life is long, but conversely, the time lag is large. Therefore, it is effective to apply a modified example in which the power saving mode is not entered within a predetermined time once the communication is entered, and which method is to be adopted is a design choice.

Next, the communication protocol of the main CPU 35 and the sub CPU 47 will be described using the time charts of FIGS. In the camera of this embodiment, communication is performed by using light as a medium, and a light emitting element (infrared LE) is used as the optical element 18 in the communication circuit 38 of the communication means on the camera body 12 side.
D) 18a and a light receiving element (photodiode) 18b are provided one by one. Further, the communication circuit 45 of the communication means on the lens holding frame B5 side is provided with one light emitting element (infrared LED) 14a and one light receiving element (photodiode) 14b as optical elements. In addition, M → S in FIGS.
From the main CPU 35 to the sub CPU 47, S → M
Represents communication from the sub CPU 47 to the main CPU 35. Further, signals 1 and 0 correspond to ON / OFF of the light projecting element, and indicate 0 when the light is turned on and 1 when the light is turned off. The lighting and extinguishing times have their respective meanings.

FIG. 8 is a time chart showing the data string communication protocol, and is the step S15 of FIG.
This is the time chart for the communication of the photometry / distance measurement data. The details will be described below. The main CPU 35 on the camera body 12 side is a sub CPU 47 on the lens holding frame B5 side.
To send a command to the light emitting element (infrared LED)
14a is turned on for a predetermined time (T ₁ ), the sub CPU 4
7 measures the lighting time and recognizes that it is a data transmission command. Then, after T ₂ hours, the LED is turned on for T ₃ hours, and the fact that the command is recognized is returned to the main CPU 35.

[0058] The main CPU35 from recognizes the T ₃ hours at of T ₄ hours, predetermined number of times the data of T5 hours per bit (n + 1 times) by the light projecting element (infrared LED) 14a Send on / off. Sub CPU
47, the respective data for example, performs a read at the timing of T _5/2, and returns an exit code of T ₆ hours after the last data reception. The main CPU 35 confirms this and terminates the communication. This communication method is used for transferring shutter opening time data, strobe light emission timing (aperture) data, and lens extension amount data.

Next, the communication protocol in the exposure sequence will be described with reference to FIG. This corresponds to the processing of step S16 of FIG. 6 and step S34 of FIG. As shown in Fig. 9 above, the main CP
From U35, the lens extension command, shutter drive command, and lens extension command are transmitted in sequence,
The sub CPU 47 returns a confirmation code, controls the drive of the mechanism in response to a command, and transmits an end code.

Flow charts of the exposure sequence are shown in FIGS. The flowchart of FIG. 10 shows the details of step S16 of FIG. 6 which is the process of the main CPU 35 during exposure, while FIG. 11 shows the process of the sub CPU 47 during exposure which corresponds to the process of FIG. This is processing, and details of step S34 in FIG. 7 are shown. In the figure, the arrows C ₁ -C ₁₀ indicates the direction of communication in each step. Also, a subscript a of T time indicating communication timing ~ M are described in correspondence with FIG. In the description, the processing of the main CPU 35 is M, the sub CPU
The process of 47 is indicated by S.

The following description will be made by associating FIG. 10 with FIG. 11 above. First, in step S40, the main CPU 3
The lens extension command, which is the exposure sequence start command, is transmitted from 5 to the sub CPU 47 at time T _a (M). When the sub CPU 47 recognizes that the command received is an exposure command, step S in FIG.
The subroutine 34 is executed (S). Then, returning the verification code at T _c time after waiting step S60 the T _b Time (S). On the other hand, in step S41 of FIG. 10, the reply of the confirmation code is waited, and if the code is returned, the process proceeds to step S43 (M). In step S42, T _b
If the confirmation code is not returned even after a lapse of time, the process returns to step S40 and the sending command is transmitted again.

In step S61 of FIG. 11, the lens extension control is performed (S). The amount of extension is based on the distance measurement data received from the main CPU 35 in advance. When the lens extension is completed, an end code is transmitted at time _{Td in} step S62 (S). This exit code is shown in Figure 10.
In step S43, a shutter start command is transmitted at time T _{e in} step S44 (M).

In step S64 of FIG. 11, after the shutter command is received, after waiting T _f time, a confirmation code is returned in T _g time (S), and in step S65, opening drive of the aperture / shutter is started (S). ). In the meantime, the main CPU 35 confirms the confirmation code in steps S45 and S46, and enters a strobe emission timing (flashmatic trigger signal) waiting state in step S47 (M).

The strobe emission timing is as follows.
Determined by the distance of the subject, step S1 of FIG.
4, the calculation is performed by the main CPU 35. That is, the aperture value that should emit light is calculated from the subject distance obtained by distance measurement and the film sensitivity strobe guide number. This data is transmitted to the sub CPU 47 in step S15 of FIG.

After the processing of step S65 in FIG. 11, in step S66, during the shutter opening drive,
The feedback signal is monitored (S), and the FM trigger signal is set to T at step S67 at the moment when the aperture for emitting light is reached.
Send in _h (S). When this signal is received in step S47 of FIG. 10 (M), it is determined in step S48 whether or not light should be emitted, for example, light emission determination at low brightness is performed (M), and in step S49, the strobe light is emitted. (M).

After step S67, step S68
Then, again, in step S14 of FIG. 6, calculation is performed based on the photometric data in the main CPU 35, and the time corresponding to the shutter time data transferred to the sub CPU 47 in step S15 is measured (S), , Step S
At 69, the shutter is closed (S), and at step S70, the exposure end code is transmitted at T _i time (S). Thereafter, the exposure sequence is completed by retracting the lens to the initial position in the same sequence.

FIG. 12 is a system power system diagram of the camera of this embodiment. The left side of the figure shows the power supply system diagram in the lens holding frame B5 on the camera body 12 side and the right side of the lens unit 50 side. The main battery 20 on the camera body 12 side is a battery check circuit 40 that consumes a large current,
It is divided into a system path connected to the strobe charging circuit 41, the feed motor drive circuit 36, and the zoom motor drive circuit 39, and a system path through a filter composed of the diode 64 and the capacitor 65. A communication circuit 38, a photometric circuit 37, etc. are connected. Further, a DC / DC converter 63 is provided for stabilizing the secondary side of the filter when driving a large current such as strobe charging.

On the other hand, the sub-battery 13 charged from the main battery 20 via the sub-battery charging circuit 19
Is similarly divided into two paths, one of which is connected to the sub CPU 47 and the communication circuit 45 via the diode 66 and the capacitor 67.
On the other hand, on the other hand, the lens drive circuit 48 and the shutter drive circuit 49
Is connected.

The sub battery charging circuit 19 is
As shown in the circuit diagram of FIG. 13, it is composed of a diode for preventing reverse charging and a resistor for limiting charging current, and is always charged when the zoom lens is at the charging position. However, as a modification thereof, a switching element such as a transistor is inserted, and the main CPU3
By switching control with 5, the camera body 12
On the side, it is also possible to prohibit charging of the sub-battery 13 during high current driving such as strobe charging. In this case,
The reverse charging prevention diode can be omitted, and the current limiting resistor can be replaced by the internal impedance of the battery depending on the capacity of the sub-battery 13.

In the camera of this embodiment described above, the sub-battery 13 is built in the lens holding frame B5 on the lens unit 50 side, and the sub-battery 13 drives the actuator 11 in the lens holding frame B5. Therefore, it is not necessary to constantly supply power to the lens holding frame B5 from the camera body 12 side, which is the image pickup apparatus body.

Further, in the present embodiment, by providing the charging means for charging the main battery 20 to the sub battery 13, it is not necessary to increase the capacity of the sub battery 13. For example, the sub-battery 13 has a capacity enough to store the focus drive / shutter drive power necessary for photographing one film of film, and the sub-battery 13 can be charged every time the film is attached / detached. 13 can be miniaturized.

Further, in the camera of this embodiment, the camera main body 12 and the lens holding frame B5 are always electrically operated by allowing charging only at the wide end position which is a specific position during the movement stroke of the lens holding frame B5. The electric connection means connected to is unnecessary, and the space and cost required for the electric connection can be suppressed.

Further, the lens holding frame B5 and the camera body 12
Since signals can be transmitted by communication between the two, information transmission such as distance measurement information and photometric information can be performed by non-contact communication means. Then, the electrical connection means for signal transmission becomes unnecessary.

In the camera of the first embodiment, charging is always performed when the connection terminals 16 and 17 which are the electrical connection means are in mechanical contact, but as a modification, Electric power is supplied from the main battery 20 to the sub-battery charging circuit 19 via the main CPU 35 (see the corresponding portion of the system diagram of FIG. 15 described later). Then, the charging operation is started when the user of the camera completes the loading operation of the film, or the charging operation is started when the power of the camera is turned on after the film is loaded. A camera that adopts the method can be proposed.

As a modification of the sub-battery 13 in the camera of the first embodiment, it is possible to propose an example in which two capacitors are connected to the sub-battery 13 and used. In this modification, parallel connection is used during charging,
A state in which the connection state is switched by a switch or the like using a transistor so as to be connected in series during discharge, and the full charge voltage of a capacitor as a sub battery is relatively low with respect to the voltage of the main battery 20 during charge. Therefore, the charging time can be shortened. On the other hand, at the time of discharging, a high voltage can be applied to the actuator 11, so that an effect of obtaining a large power can be obtained.

When two capacitors are connected in parallel, where V _{0 is} the rated voltage of the capacitor, C is the capacity, and R is the internal resistance, then voltage = V _0/2 capacity = 2 × C internal resistance = R / 2 When two capacitors are connected in series, voltage = 2 × V ₀ capacitance = C / 2 internal resistance = 2 × R. The charging time T when charging at rated voltage V _M of the main battery 20, charging time T = - represented by capacitance × internal resistance × Ln (1-capacitor fully charged voltage / V _M). The capacitor full charge voltage matches the rated voltage.

As another modification, it is possible to propose one in which a sub-battery composed of a plurality of batteries is arranged on the lens unit side. Also in this example, by connecting in parallel during charging and connecting in series during discharging, it becomes possible to increase the actuator driving voltage during discharging, and a large driving force can be obtained. Also, the time required for charging can be minimized.

As another modification of the camera of the first embodiment, when a high voltage is required as the voltage of the sub-battery 13 due to restrictions for driving the focusing lens and the shutter, etc. The charging circuit may be provided with a boosting unit to boost the voltage of the main battery 20 once and then charge the sub-battery 13.

Further, in the camera of the first embodiment, the connection terminals 16 and 17 which are the electrical connection means are mechanically brought into contact with each other to be in a chargeable state when the zoom position reaches the wide end position. However, as a modification thereof, it is possible to retract each lens group to the image pickup surface side of the camera body 12 further from the wide-angle state when the camera is stored, that is,
It is possible to propose a camera that employs a charging method in which the rechargeable position is the retracted position for the camera that performs the retracted operation.

As another modified example of the first embodiment, in the retractable camera, from the wide position,
The lens holding frame B5 may be in the chargeable position over the stroke of moving the lens holding frame B5 in the optical axis direction up to the retracted position. In this case, it is necessary that the connection terminals 16 and 17 which are electrical connection means be kept in contact with each other for a predetermined stroke in the optical axis direction from the wide position to the retracted position. Therefore, for example, as shown in the cross-sectional view around the connection terminal portion of FIG. 14, the connection terminal 16 is elastically supported by the spring 68 or the like so as to be movable in the optical axis direction with respect to the lens holding frame B5. A contact state over a predetermined stroke can be easily realized. It is assumed that the stroke when retracted is sufficiently smaller than the stroke when zoomed between wide and tele.

Next, a camera which is an image pickup apparatus according to the second embodiment of the present invention will be described. FIG. 15 is a control system diagram of the camera of the second embodiment. The same components as those of the camera of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the camera of this embodiment, the camera body 1
The charging circuit 19 which is a charging means provided adjacent to the connection terminal 17 which is an electrical connection means on the second side is a main CPU.
The charging voltage is variable under the control of 35. That is, it is possible to select an arbitrary charging voltage equal to or lower than the voltage of the main battery 20 without performing the boosting operation.

On the other hand, the lens holding frame B on the lens unit side
5, the voltage of the sub battery 13 is detected and the sub CPU
A sub-battery check circuit 71, which will be described later, which is a voltage detecting means for transmitting to 47 is built in. Therefore, since the sub CPU 47 and the main CPU 35 can transmit a signal by optical communication, the main CPU 35 can recognize the voltage of the sub battery 13 at an arbitrary timing during discharging.

In the camera of the present embodiment configured as described above, the voltage of the sub-battery 13 is detected by the sub-battery check circuit 71 and transmitted to the main CPU 35, for example, after a certain photographing operation is performed. When the main CPU 35 determines that the voltage of the sub-battery 13 becomes equal to or lower than a predetermined value in consideration of the power required for driving the focusing lens, driving the shutter, communication, etc. to perform the next shooting, The next photographing is prohibited, and the zoom drive motor 9 (see FIG. 1) is forcibly driven to enable charging, and charging is performed.

Here, the minimum voltage required for the sub-battery 13 is, for example, the minimum applied voltage required to operate the sub CPU 47 normally, or to operate the lens drive and the shutter drive normally. It is determined by the minimum applied voltage to the actuator 11 required.

Further, when the film is loaded in the camera body 12, the main CPU 35 can know the number of shots of the film from the DX code or the like. Therefore, if the charging voltage of the sub-battery 13 is variable according to the number of film shots, the time required for charging can be shortened when using a film with a small number of film shots.

FIG. 16 is a block diagram showing a structure around the CUP, which is a characteristic part of the camera of this embodiment. As shown in this figure, the sub-battery charging circuit 19 includes the main CPU 35.
It is possible to switch charging / stopping by
The charging voltage is A / D converted and input to the main CPU 35. The DX input circuit 72 inputs sensitivity information, frame number information, etc. of the film loaded in the camera to the main CPU 35. In addition, the sub battery check circuit 71 is a sub C
It is controlled by the PU 47, A / D-converts the power supply voltage when a current is passed from the sub-battery 13 to the dummy load, and inputs it to the sub-CPU 47. In addition, diodes 73 and 75 are connected to the main battery 20 and the sub-battery 13, respectively.
4, 76 are connected.

In the camera of the present embodiment, in step S3 of FIG. 5 or step S22 of FIG. 6, the main CPU 35 causes the main CPU 35 to charge the voltage of the sub-battery 13 immediately before the zoom lens is extended from the sub-battery chargeable position. Check. Then, when the voltage does not reach the predetermined level, the extension of the zoom lens is prohibited and the charging is continued. In addition, since the charge completion determination voltage level can be made variable by the film frame number information input from the DX input circuit 72, for example, by lowering the voltage when using the 24 shot film than the 36 shot film, It is also possible to minimize the sub-battery charging time, which is the zoom lens extension prohibition time. Of course, it is possible to charge more efficiently by adding the information of the number of frames already shot to this.

Further, by disposing the sub-battery check circuit 71 as described above, the following processing becomes possible. That is, in the state where the zoom lens is extended from the sub-battery chargeable position, the main CPU 35 sets the arbitrary timing, for example, the main battery check timing, in steps S13, S21 and S of FIG.
23, the remaining amount of the sub battery 13 can be known via the sub CPU 47. If the remaining amount of the sub battery 13 has not reached the predetermined value, the process is branched to S7 of FIG. Is forced into the sub battery chargeable position. Then, thereafter, as described above, the operation of the camera can be guaranteed by prohibiting the extension of the zoom lens until the charging is completed.

The sequence of the sub-battery check in this embodiment can be executed by the communication protocol shown in the time chart of FIG. 17, for example. That is, the main CPU 35 transmits the sub-battery check command to the sub-CPU 47 at T ₁₁ hours. Sub CP
Upon receiving this signal, the U 47 checks the remaining amount of the sub battery 13 by the sub battery check circuit 71 during the time T ₁₂ . If the remaining amount is sufficient, the battery OK code is returned at T ₁₃ hours, and if the remaining amount is small, the above reply is not performed. On the other hand, the main CPU 35
When T ₁₃ is received after T ₁₂ hours, the battery remaining amount is determined to be sufficient and the battery is OK, and if there is no reply, the battery remaining amount is determined to be insufficient and the battery is NG. Instead of not replying, a battery NG code (T ₁₄ (not shown)) may be set even in the case of NG.

Since the camera of the present embodiment is provided with the sub-battery voltage detecting means, when the sub-battery voltage becomes less than the predetermined value and normal focusing operation, shutter driving, etc. cannot be performed, an abnormal situation occurs. The temporary shooting operation can be prohibited and the normal state can be restored. That is, by detecting an abnormal situation on the lens holding frame side and transmitting information to the image pickup apparatus body side, the lens holding frame can be forcibly moved to the sub-battery chargeable position. You can avoid trouble.

When the sub-battery is charged for each film, the number of film shots, for example, 12
The charging voltage of the sub-battery can be changed according to the number of sheets, 24 sheets, and 36 sheets, and the charging time can be shortened when using a film with a small number of shots.

Next, a camera which is an image pickup apparatus according to the third embodiment of the present invention will be described. FIG. 18 is a control system diagram of the camera of this embodiment. In the first embodiment, a rechargeable secondary battery was used as the built-in battery of the lens holding frame B5, or a condenser was used as a modified example.
In this embodiment, a sub battery 81 which is a primary battery is used as the built-in battery.

In this case, the main battery 20 on the camera body side does not charge the sub-battery 81, and the electrical connection means between the lens holding frame B5 and the camera body 12 and the charging circuit are unnecessary. Note that, as shown in FIG. 18, the constituent members other than the above are the same as the constituent members of FIG. 2 of the first embodiment.

Then, as the battery capacity of the sub-battery, the total amount of power consumed for driving the focusing lens in the lens holding frame B, driving the shutter, communication, etc. is secured within the useful life of the camera. It will be. For example, 1 in 5 years
Assuming that 10,000 times of shooting is a guaranteed condition, the focusing lens drive, shutter drive, communication power required for 10,000 times of shooting,
In addition, the capacity of the sub-battery battery will be determined in consideration of the power lost due to the self-discharge of the sub-battery in 5 years.

According to the camera of this embodiment, by using the primary battery having the capacity corresponding to the useful life of the camera as the sub-battery, the charging means and the electrical connection means for charging are also unnecessary. .

(Supplementary Note) Based on the embodiment described above, an image pickup apparatus having the following configuration can be proposed. That is, (1) in an image pickup apparatus having a main battery as a main power source on the main body side, a lens holding frame supported movably in the optical axis direction with respect to the image pickup apparatus main body, and a shutter arranged on the lens holding frame. An actuator that drives at least one of the mechanism and the focus lens driving mechanism, a sub CPU that is arranged in the lens holding frame and drives and controls the actuator, and a sub CPU that is arranged in the lens holding frame and supplies power to the actuator and the sub CPU. An image pickup apparatus comprising: a sub-battery for supplying the. According to the present imaging device, since the lens holding frame has the built-in sub-battery, there is no need for an electrical connection means for constantly supplying power to the lens holding frame from the imaging device main body side, and the size of the lens barrel / camera And optical performance can be improved.

(2) In the image pickup device as described in appendix (1), the sub-battery is composed of a capacitor. (3) In the image pickup device according to supplementary note (1), the sub-battery is a secondary battery. (4) In Supplementary Note (1), the lens holding frame is electrically connected to the main body of the image pickup apparatus near the position where the lens holding frame is moved closest to the image pickup surface, and the main battery is charged to the sub battery. An imaging device comprising: a charging unit that enables the above.

(5) In an image pickup apparatus having a main battery as a main power source on the main body side, it is a lens barrel which is movably supported in the optical axis direction with respect to the main body of the image pickup apparatus and has a variable focal length. At the same time, a lens holding frame that is displaced toward the imaging surface side due to the collapsing operation performed by the lens barrel portion, an actuator that drives at least one of a shutter mechanism and a focus lens driving mechanism provided on the lens holding frame, and the lens holding frame. A sub-CPU arranged in a frame for driving and controlling the actuator, a sub-battery arranged in the lens holding frame for supplying electric power to the actuator and the sub CPU, and a variable focal length range of the lens holding frame. From the position near the imaging surface to the position where the collapsing operation is completed, the lens holding frame and the imaging device body should be electrically connected. There, an imaging apparatus characterized in that it comprises a charging means making it possible to charge the main battery in the sub-battery, the. According to the present imaging device, the main battery on the main body side charges the sub-battery on the lens holding frame side only when the lens holding frame is at a specific position. Therefore, an electrical connection means for charging is required. The sub-battery can also be miniaturized while minimizing the space.

(6) In the image pickup device as described in appendix (1), the sub-battery is a primary battery. (7) In the supplementary notes (4) and (5), the sub-battery is configured by connecting a plurality of capacitors or secondary batteries, and the changeover switch means for connecting in parallel during charging and in series during power supply. An image pickup apparatus comprising: According to this imaging device, at the time of discharging,
It is possible to apply a high voltage to the actuator to obtain a large power, and at the time of charging, it is possible to minimize the time required for charging when charging the main battery having a predetermined voltage.

(8) In an image pickup apparatus having a main battery as a main power source on the main body side, a lens holding frame supported so as to be movable in the optical axis direction with respect to the main body of the image pickup apparatus and the lens holding frame. A shutter mechanism including a driving actuator, at least one of a focusing lens driving mechanism including a driving actuator, a sub-battery arranged in the lens holding frame and supplying electric power to the actuator, and a sub battery arranged in the image pickup apparatus main body. A main signal processing unit that is provided and performs signal processing of various signals for shutter control and / or focus control, and a signal processing of various signals for shutter control and / or focus control that is provided in the lens holding frame. Data communication is performed between the sub signal processing unit and the main signal processing unit and the sub signal processing unit. Imaging apparatus characterized in that it comprises a means. According to the present image pickup apparatus, since signal transmission by communication can be performed between the lens holding frame and the camera body, information such as distance measurement information and photometry information can be transmitted by non-contact communication means. , Electrical connection means for signal transmission becomes unnecessary.

(9) In Supplementary Note (8), the communication means is optical communication, and the lens holding frame and the image pickup apparatus main body are respectively provided with a light emitting element and a light receiving element for communication. Imaging device. (10) The image pickup apparatus as described in appendix (8), wherein the communication unit sends a digital signal by an amplitude modulation method when performing communication.

(11) In an image pickup apparatus having a main battery as a main power source on the main body side, the main body is supported so as to be movable in the optical axis direction with respect to the main body of the image pickup apparatus, and at least one of a shutter mechanism and a focus lens driving mechanism. A lens holding frame having an actuator for driving the lens holding frame, communication means for performing communication for signal transmission between the lens holding frame and the image pickup apparatus main body, and a sub-battery arranged on the lens holding frame and supplying electric power to the actuator. A charging means for charging the sub-battery with a main battery arranged in the imaging device main body at a predetermined position of the lens holding frame; and a voltage detecting means for detecting a voltage of the sub-battery. An imaging device characterized by. According to this image pickup device, since the sub-battery voltage detection means is provided, it is possible to prevent camera malfunction due to an abnormal decrease in the sub-battery voltage, and to improve the efficiency depending on the number of shots of the film used. It becomes possible to charge the battery.

(12) In supplementary note (11), when the image pickup apparatus is used, the sub-battery voltage detection means periodically detects the sub-battery voltage. An imaging device characterized by driving a lens holding frame to charge a sub-battery. (13) In addition (11), when the film for photography is loaded in the camera, the prescribed number of film shots is DX.
An image pickup apparatus comprising: a number-of-shots reading unit for reading from a code; and a charging completion determination voltage level changing unit for changing a full charging voltage of a sub-battery according to a result of the number-of-images reading unit.

[0105]

In the image pickup apparatus according to the first aspect of the present invention described above, since the sub-battery is built in the lens holding frame, the electric power for constantly supplying power to the lens holding frame from the image pickup apparatus main body side. This makes it possible to downsize the lens barrel / camera and improve the optical performance.

In the image pickup device according to claim 2 of the present invention, the main battery on the main body side charges the sub battery on the lens holding frame side only when the lens holding frame is at a specific position. It is possible to reduce the size of the sub-battery while minimizing the space required for the electrical connection means.

Since the image pickup device according to the third aspect of the present invention is provided with the sub-battery voltage detecting means, it is possible to prevent the camera malfunction due to the abnormal decrease in the sub-battery voltage. In addition, it becomes possible to perform efficient charging depending on the number of shots of the film used.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of a mechanism of a camera which is an image pickup apparatus according to a first embodiment of the present invention.

FIG. 2 is a control system diagram of the camera shown in FIG.

FIG. 3 is a perspective view of a cam ring portion of the camera shown in FIG.

FIG. 4 is a block diagram of the camera of FIG.

5 is a part of a flow chart of a battery loading process of the camera of FIG.

6 is a part of a flow chart of a battery loading process of the camera of FIG.

7 is a flowchart of charging OK processing of the camera shown in FIG. 1;

8 is a time chart showing a data string communication protocol of the camera shown in FIG.

9 is a time chart showing an exposure sequence communication protocol of the camera shown in FIG.

10 is a flowchart of the exposure sequence of the camera of FIG. 1 on the main CPU side.

11 is a sub-C of the exposure sequence of the camera of FIG.
Flow chart on the PU side.

12 is a system power system diagram of the camera of FIG.

13 is a sub-battery charging circuit diagram of the camera shown in FIG.

14 is a cross-sectional view around a connection terminal portion showing a modified example of the connection terminal portion of the camera shown in FIG.

FIG. 15 is a control system system diagram of a camera of the image pickup apparatus according to the second embodiment of the present invention.

16 is a block diagram showing the configuration around the CPU of the camera shown in FIG.

FIG. 17 is a time chart of the communication protocol of the sub battery check of the camera of FIG.

FIG. 18 is a system diagram of a control system of a camera of the image pickup apparatus according to the third embodiment of the present invention.

FIG. 19 is a sectional view of a lens barrel of a conventional image pickup apparatus.

[Explanation of symbols]

 5: Lens holding frame B (lens holding frame) 7: Shutter mechanism 11: Actuator for driving 12: Camera body (imaging device body) 13, 81: Sub battery 17: Sub Battery check circuit (voltage detection means) 18 ... Optical element (communication means) 18a, 14a ... Projector element (communication means) 18b, 14b ... Light receiving means (communication means) 19 ... Charging circuit ( Charging means) 20 Main battery 22 Focus lens drive mechanism 22a Cam (focus lens drive mechanism) 25 Shutter drive lever (shutter mechanism) 26 Shutter (shutter mechanism)

Claims (3)

[Claims] 1. An image pickup apparatus having a main battery as a main power source on a main body side, a lens holding frame supported movably in an optical axis direction with respect to the main body of the image pickup apparatus, and a drive arranged on the lens holding frame. A shutter mechanism including a drive actuator, at least one of a focus lens drive mechanism including a drive actuator, and a sub-battery that is disposed in the lens holding frame and supplies electric power to the actuator. A characteristic imaging device. 2. A charging means for charging a sub-battery arranged in the lens holding frame from a main battery arranged in the imaging device body when the lens holding frame is in a predetermined position. The image pickup apparatus according to claim 1, which is characterized in that. 3. An image pickup apparatus having a main battery as a main power source on the main body side, wherein a lens holding frame supported movably in the optical axis direction with respect to the image pickup apparatus main body, and a shutter arranged on the lens holding frame. An actuator that drives at least one of the mechanism and the focus lens driving mechanism, a communication unit that communicates for signal transmission between the lens holding frame and the image pickup apparatus main body, and an electric power supply to the actuator that is arranged in the lens holding frame. A sub-battery for supplying the sub-battery, a charging means for charging the sub-battery with a main battery arranged in the imaging device main body at a predetermined position of the lens holding frame, and a voltage detecting means for detecting a voltage of the sub-battery, An image pickup apparatus comprising: