JPH03213839A - Camera - Google Patents

Abstract

PURPOSE:To prevent imperfect image-pickup by recognizing the position of an inner attachment lens and preventing image pickup when the lens exists at the middle position between acting and non-acting positions. CONSTITUTION:The macro lens(inner attachment lens) 6 is driven from the normal non-acting position where the lens 6 is retreated out of a photographing optical path to the normal acting position 6' where the lens exists on the photographing optical path by a macro lens actuator 7 which is controlled by a CPU(means for controlling recording action) 1. At such a time, outputs from a normal non-acting position sensor 4(inner attachment lens position recognizing means) and a normal acting position sensor 5(inner attachment lens position recognizing means) are inputted in the CPU 1. When the position sensors 4 and 5 recognize that the lens 6 exists at the middle position other than the normal acting position and the normal non-acting position an image- pickup action is prevented by the CPU 1. Thus, such an unexpected state that the imperfect image-pickup is performed by inadvertently depressing a release button when the lens 6 exists at the position other than the normal positions is avoided.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a camera, specifically a macro lens.

The present invention relates to a camera having an inner attachment lens such as a wide or teleconverter lens.

[Prior Art] In recent years, cameras have been developed or commercialized in which an inner attachment lens, such as a macro lens, wide-angle lens, or teleconverter lens, is built into the camera body. When this camera wants to take a picture using the inner attachment lens, it is moved manually or electrically from its retracted position to the photographing optical path to take the picture.

[Problems to be Solved by the Invention] However, when photographing with the above-mentioned conventional camera equipped with an inner attachment lens, the attachment lens may not be completely moved to the optical path, that is, may not have reached its normal working position. There is a possibility that imaging will be performed in a state where the camera is not in use or has not been evacuated to the retracted position, that is, the non-operating position, and in that case, there is a problem that incomplete imaging will be performed. there were.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to use a position recognition means of an inner attachment lens, and to prohibit or permit an imaging (recording) operation based on the recognition means, so that the attachment lens can be activated or deactivated. To provide a camera that does not take an image (record) when it is at an intermediate position.

[Means and Effects for Solving the Problems] The camera of the present invention includes an inner attachment lens that is movable between a normal working position and a non-working position, and an inner attachment lens that is movable between a normal working position and a non-working position. and inner attachment lens position recognition means for recognizing that the inch-attachment lens is at an intermediate position other than the normal operation position and the non-operation position; The present invention is characterized by comprising means for preventing the recording operation from being performed when it is recognized that there is a certain fact.

The camera of the present invention also includes an inner attachment lens that is movable between a normal working position and a non-working position, and a means for prohibiting movement of the inner attachment lens at least when performing an image recording operation. It is characterized by comprising the following.

C implementation example] The present invention will be explained below with reference to the embodiments shown in the figures.

FIG. 1 is a block diagram of an electric circuit of an electronic still camera showing an embodiment of the present invention. The CPU 1 is a system controller that controls the camera. First, photographing light of the subject 22 is taken in through the photographing lens 2, and an image is formed on the photoelectric conversion surface of the CCD 10, which is a solid-state image sensor.

The above-mentioned photographic lens 2 uses a CPU for autofocus.
Focusing is performed by the AF lens actuator 3 based on the drive signal I. Then, the output of the lens initial position sensor 9 is input to the CPUI to provide reference position data for focusing. In the figure, the photographic lens 2 is shown at the reference position, and the photographic lens 2' is shown at the focusing position.

The macro lens 6, which is an inner attachment lens, moves from a normal non-working position, which is retracted outside the photographing optical path, to a normal working position, which is a photographing position on the photographing optical path, by a macro lens actuator controlled by the CPU (the macro lens shown in Fig. 1). 6' position).

Note that a driving means such as a DC motor is used for the actuator tough. A regular non-operating position sensor 4 and a regular working position sensor 5, which are inner attachment lens position recognition means, are arranged at each of the above positions, and their outputs are input to the CPUI. Also,
These sensors are composed of switches using mechanical contacts, photoinclaves, magnetic sensors, and the like.

Further, the output of the ill distance sensor 8 composed of a one-dimensional CCD or the like is input to the CPUI and used as distance measurement information for focusing.

The imaging signal photoelectrically converted by the CCD 10 is amplified and processed by the imaging circuit 11.
The signal is further FM-modulated by the modulation circuit 12 and input to the recording/reproduction amplification circuit 13.

This amplifier circuit 13 switches between recording and reproduction according to instructions from the CPUI, and outputs a recording signal to the magnetic recording/reproducing head of the floppy disk drive 14 during recording.

Furthermore, during reproduction, the reproduction signal read by the magnetic recording/reproduction head is amplified and output to the demodulation circuit 15.

The video reproduction signal demodulated by the demodulation circuit 15 is output to a display device (not shown). The reproduced output of the demodulation circuit J5 is also output from the envelope detection circuit 1.
6, and its output is input to the CPUI as recorded/unrecorded information indicating whether a video signal is recorded on the corresponding track on the recording medium.

Note that the CPU controls the driving spindle motor of the drive 14 and the recording/reproducing head. Further, detection signals such as presence/absence of an inserted medium, presence/absence of a claw on the medium case, etc. are input from the drive 14 to the CPUI. Further, a mute signal is also output from the CPU to the demodulation circuit 15 during playback of an unrecorded track.

Among the operation switches, the release switch (hereinafter referred to as SW) 17 is used to instruct shooting execution, and the up 5W 18 and down 5W 19 are used to increment or decrement the playback track of the magnetic recording medium during playback. I do. Also, macro switching 5
W20 instructs to move the macro lens 6 to the active position for macro photography, or to retreat to the non-active position for normal photography, and is executed every time SW is suppressed. The above instructions are switched to . Furthermore, the mode switching 5W21 is for switching between the recording operation mode and the reproduction operation mode for each suppression. The outputs of these switches are all input to the CPUI, and each operation instruction data is taken in.

In addition, the above-mentioned CPUI is connected to the macro lens 6 as described later.
processing means (third
The means shown in step S22°823 in the figure) is built-in.

Processing operations in the photographing operation mode of the electronic still camera of this embodiment configured as described above will be explained with reference to the flowchart of FIG. 2.3 and the time chart of FIG. 4.5.

A main processing routine (not shown) for photographing operation of a control unit built into the CPUI alternately calls a macro lens drive processing subroutine and a recording processing subroutine to perform photographing processing. First, when the macro lens drive processing subroutine shown in FIG. 2 is called,
In step S11, it is determined whether macro switching 5W20 is on. If it is off, immediately return from this routine. If it is on, the process advances to step S12, where it is checked whether the current processing state is recording processing, and if processing is in progress, the routine immediately returns. That is, driving of the macro lens 6 is prohibited during the recording process.

If the process is not in progress, the process proceeds to step 313, where the position of the macro lens is checked, and whether or not the output of the working position sensor 5 is on is determined. Note that in the following description, "the output of the sensor is on or off" is referred to as "the sensor is on or off."

If the operating position sensor 5 is off, step Sl
It is determined that the macro photography mode has been switched based on the ON signal of the macro switching SW determined at l. Then, the process proceeds to step S14, where a drive signal is output from the CPUI to the macro lens actuator tough, and the macro lens 6 is driven in the direction of the action position. Then, as shown in FIG. 4, the output of the actuator 7 is turned on, and the output of the non-working position sensor 4 is turned off because the macro lens 6 moves toward the working position. The drive by the actuator 7 is continued until the action sensor 5 is turned on as determined in step S15.

Then, when the macro lens 6 moves to the operating position, the output of the position sensor 5 is turned on, and step S1
Proceed to step 8. Then, the drive of the actuator tough is stopped. That is, as shown in FIG. 4, the output of the actuator 7 is turned off based on the output of the position sensor 5.

On the other hand, in step 813 described above, if the active position sensor 5 is on, it is determined that the mode has been switched to the normal photography mode. Then, the process proceeds to step S16, where the macro lens actuator starts driving the macro lens 6 toward the non-operating position. Then, step S17
Based on the determination, the driving of the macro lens 6 is continued until the non-active position sensor 4 is turned on, and when the macro lens 6 reaches the non-active position, that is, the normal shooting state in which the macro lens 6 is not used, the process advances to step S18. The drive of the actuator 7 is stopped. These series of movements are shown in the time chart of Figure 5.

After the processing in step 318, the routine returns to the mth main routine. Then, the recording processing subroutine shown in FIG. 3 is called. First, in step S21, it is determined whether the release 5WI7 is on or not, and if it is off, the routine is turned around. If it is on, the process advances to step S22 and the position of the macro lens 6 is detected.
A determination is made as to whether the inactive position sensor 4 is on. If it is on, the process jumps to step S24, but if it is off, it is determined in step 323 whether or not the action position sensor 5 is on. When the sensor 5 is off (sensor 4 is also off), that is, when the macro lens 6 is at an intermediate position between the active and non-active positions, the routine returns without performing the recording operation.

If the sensor 5 is on, the process advances to step S24 and image recording is performed. That is, in step S24, the spindle motor of the floppy disk drive 14 is started, and then the process proceeds to step S25, where the distance measurement sensor 8 acquires distance measurement data. Further, in step S26, the AF actuator 3 performs focusing of the photographing lens 2 based on the distance measurement data. Then, in step S27, an imaging signal is taken in from the CCD 10, and the signal is processed through the imaging circuit 11 and the like, and the video signal is recorded on the recording medium. Subsequently, in step S28,
The spindle motor is stopped, this routine is ended, and the process returns to the main routine. The time charts for this recording process are shown in FIG. 4 for macro photography and in FIG. 5 for normal photography, each showing that the recording process is executed based on the signal of the release SWI 7. There is.

However, as shown in the figure, even if the release 5WI7 signal is input while the macro lens actuator is operating, the signal is ignored and no photography is performed.

Instead of the output signal of the inactive 1 active position sensor 4.5 of the macro lens 6 in the above embodiment, an output signal based on a drive command issued by the CPU 1 itself, such as a signal such as the number of drive pulses or drive time, may be used. It is possible. Moreover, the macro lens, which is the inner attachment lens, can of course also be applied to a built-in teleconverter lens or wide converter lens. Furthermore, the present invention can be applied not only to electronic still cameras but also to video cameras, silver halide cameras, and the like.

C Effects of the Invention] As described above, the camera of the present invention is provided with a means for not performing a recording operation when the built-in attachment lens is at an intermediate position other than the normal working position or non-working position. According to the present invention, an unexpected situation such as incomplete recording due to pressing the release button by mistake when the attachment lens is in a non-regular position does not occur. Furthermore, since the inner attachment lens is not driven during recording, it is possible to provide a camera that has remarkable effects such as preventing incomplete recording at the same time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an electric circuit, etc. of an electronic still camera showing an embodiment of the present invention, FIG. 2 is a flowchart of the macro lens drive processing subroutine of the electronic still camera shown in FIG. 1, and FIG. 1 is a flowchart of the recording processing subroutine of the electronic still camera shown in FIG. 1, FIG. 4 is a time chart of the operation of the electronic still camera shown in FIG. 2 is a time chart of the operation of the electronic still camera when switching to normal shooting. 1...CPU (means to recognize that the inner attachment lens is not in the correct position and prevent recording operation) 4.......Regular Non-operating position sensor (inner attachment lens position recognition means) 5....... Regular working position sensor (inner attachment lens position recognition means) 6.6'... Macro lens (inner attachment lens position recognition means) lens)

Claims (2)

[Claims] (1) Recognize that the inner attachment lens is movable between the normal working position and the non-working position, and that the inner attachment lens is in an intermediate position other than the normal working position and the non-working position. Inner attachment lens position recognition means; When the inner attachment lens position recognition means recognizes that the inner attachment lens is at an intermediate position other than the normal working position and non-working position, the recording operation is not performed. A camera characterized by comprising: a means for making an image; and a means for making an image. (2) An inner attachment lens provided movably between a normal working position and a non-working position, and means for prohibiting movement of the inner attachment lens at least when performing an image recording operation. A camera characterized by: