JPH06337465A - Indicating device for camera - Google Patents

Abstract

PURPOSE:To provide an indicating device for a camera, which can efficiently display several kinds of information in a less space, and which can have a reduced number of components. CONSTITUTION:In a indicating device that can select either a time-count mode in which a rotary indicating needle 11 is rotated in accordance with a counted time on time counting means provided in a camera, or an information indicating mode in which the rotary indicating needle 11 is rotated in accordance with an information different from a counted time, at least two kinds of information including a number of photographed frames of a film can be displayed in the information indicating mode. Indices 12 which indicate a number of photographed frames of a film are arranged on a circular path for the rotary indicating needle 11 at pitches of an angle of 6 deg. corresponding to one frame from the start position of the needle 11 in the time counting mode as a reference position. Indices 13 to 16 for other information are arranged on the circular path of the needle 11, at pitches of an angle of 60 deg., following the indices 12 for a number of photographed frames.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device of a camera for displaying various kinds of photographing information with a rotating pointer.

[0002]

2. Description of the Related Art As a display device for displaying various kinds of photographing information such as the number of frames to be photographed, as shown in FIG. 6, 3 is provided on a rotation path of a pointer S which is rotationally driven by a driving source such as a stepping motor.
An index I having a scale Ia for every 0 ° and representative numerical indexes Ib to Ie is provided, and the operation of the pointer S is rotated by 6 ° per second with the numerical index 1b as a starting position. There is one that can be switched between a photographing frame number display mode in which it is rotated corresponding to the number of photographing frames.

[0003]

In the display device of FIG. 6,
Since the index I for 36 frames is sufficient for displaying the number of photographed frames, the index in the range A exceeding this is useless.
Further, in order to display information other than the number of frames to be photographed, it is necessary to provide another display section B, which requires a separate drive mechanism, which causes a cost increase.

An object of the present invention is to provide a display device for a camera which can efficiently display a plurality of types of information in a small space and can reduce the number of parts.

[0005]

To explain with reference to FIG. 1 showing an embodiment, a display device of the present invention measures the time when a rotary pointer 11 is rotated corresponding to the time measured by a time measuring means provided in a camera. The present invention is applied to a display device of a camera capable of selecting one of a mode and an information display mode in which the rotary pointer 11 is rotated corresponding to information different from the measured time. And
At least 2 pieces of information to be displayed in the information display mode
A plurality of types of indexes 12 to 16 corresponding to a plurality of types of information provided as display targets in the information display mode are provided on the rotation path of the rotation pointer 11 to indicate the start position of the rotation pointer 11 in the timekeeping mode. As a reference, the above-described object is achieved by arranging the rotary pointer 11 at an angular pitch that is an integral multiple of the rotation angle (6 °) of the rotary pointer 11 corresponding to the time counting unit in the time counting mode. The information to be displayed in the information display mode includes at least two types including the number of film frames. When the number of frames to be photographed is to be displayed, the index 12 for displaying the number of frames to be photographed is set to a rotation path of the rotary pointer 11 at a pitch of 6 ° per frame with reference to the start position of the rotary pointer 11 in the timekeeping mode. Place on top. Then, following the index 12 of the number of photographed frames, the index 1 corresponding to other information
3 to 16 may be arranged.

[0006]

Operation: When the information display mode is selected, the rotary pointer 1
1 is rotationally driven on the indexes 12 to 16 corresponding to the information to be displayed. On the other hand, when the timekeeping mode is selected, the rotary pointer 11 is rotationally driven from a predetermined start position in accordance with the timekeeping time. At this time, the indexes 12 to 16 corresponding to a plurality of types of information are arranged at an angular pitch that is an integral multiple of the rotation angle of the rotary pointer 11 corresponding to the time unit with reference to the rotation start position of the rotary pointer 11. Rotating pointer 11
The timed time can be read from the relative positions of the indexes 12 to 16.

Incidentally, in the section of means and action for solving the above problems for explaining the constitution of the present invention, the drawings of the embodiments are used for making the present invention easy to understand. It is not limited to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. FIG. 2 is a top view of a camera to which the display device of this embodiment is applied. In the figure, 1 is a camera body, 2
Is a taking lens barrel, and 3 is a release button. Reference numeral 4 denotes a mode selection dial for selecting the exposure control mode of the camera, which is rotatable around the release button 3. Set the index 4a of the mode selection dial 4 to the index "OF" on the camera body 1 side.
When set to "F", various camera operations are stopped. When the index 4a is aligned with the index "P", the camera determines both the shutter speed and the aperture value, and when the index "A" is aligned, the camera determines the shutter speed corresponding to the set aperture value. The exposure is controlled in the aperture priority mode, and when the index "T" is reached, the exposure is performed only while the release button 3 is fully pressed.

A command dial 5 generates a pulse signal according to the rotation. 6 is an AF mode button, 7 is a correction mode button, and 8 is a self-timer button. The self-timer button 8 is used to set and activate the self-timer. When the pushing time is within a predetermined second, a single timer is set in which the exposure operation is performed only once, and the timer is activated by releasing the pushing operation. It Self-timer button 8
When is continuously pressed for a predetermined time or more, a double timer is set in which the exposure operation is performed twice at a constant interval. The functions of the AF mode button 6 and the correction mode button 7 will be described later.

Reference numeral 9 is a pointer-type display for displaying various kinds of photographing information. As shown in detail in FIG.
Is a counter display unit 10 that mainly displays the number of film frames, and an exposure correction amount display unit 2 that displays the exposure correction amount.
0, a distance display unit 30 that displays distance information, and a diaphragm display unit 40 that displays diaphragm information.

The counter display unit 10 has a pointer 11 which is driven to rotate by a stepping motor (not shown), a frame number indicator 12 for displaying the number of frames to be photographed, and a film rewinding state indicating that the camera is in a film rewinding state. Index 13 and single timer index 14 indicating the self-shooting state by the single timer
And a double-timer index 15 indicating a self-shooting state by the double-timer, and a film-absence index 16 including a letter “E” indicating absence of the film. Hereinafter, the rewind index 13 to the film absence index 16 will be referred to as the mode index 13
It may be collectively referred to as "~ 16".

The frame number index 12 is a scale 120 engraved in a clockwise direction around the rotation center of the pointer 11 at a pitch of 6 °, and numerical indices 121, 122, 123 indicating typical numbers of frames to be photographed.
It has and. The scale 120 is positioned so that when the pointer 11 is arranged parallel to the optical axis direction of the photographic lens (not shown) and pointing to the front side of the camera, the tip of the pointer 11 and the position indicating the number of photographic frames are 0. (Fig. 3
(See dotted line position in (a)). The number of graduations on the graduation 120 is 36 corresponding to the maximum number of photographic frames of the film mounted on the camera, which is 36. Mode index 1
3 to 16 are arranged in a counterclockwise direction at a pitch of 30 ° from the position where the number of frames to be photographed is 0 on the scale 120.

The exposure correction amount display section 20 has a pointer 21 which is rotationally driven by a stepping motor (not shown), and an index 22 which is arranged along the rotation path of the pointer 21 and is provided with a numerical value indicating the exposure correction amount. . Correction mode button 7 (see FIG. 2)
If you rotate the command dial 5 while pressing, the exposure compensation amount will change from -2 to + depending on the direction and amount of rotation.
It changes between two steps, and the pointer 21 rotates to a position indicating the set exposure correction amount.

The distance display section 30 has a pointer 31 which is rotationally driven by a stepping motor (not shown), and an index 32 which is arranged along the rotation path of the pointer 31, and one end of the index 32 is at infinity. , And a character index 321 composed of the character “AF” are attached.

The operation of the pointer 31 changes according to the focus mode selected by the AF mode button 6 (see FIG. 2).
When the command dial 5 is rotated while pressing the AF mode button 6, a manual focus mode in which the photographer can arbitrarily set the shooting distance (hereinafter referred to as MF mode).
Is selected, and the set value of the shooting distance changes according to the rotation direction and the rotation amount of the command dial 5. At this time, the pointer 31 rotates to a position indicating the set shooting distance. MF
When the AF mode button 6 is pressed again from the mode,
The auto focus mode (hereinafter referred to as AF mode) in which the taking lens is automatically driven to the in-focus position is selected according to the object distance detected by the distance measuring device of the camera. Move on the index 321.

The aperture display section 40 is provided with a pointer 41 which is rotationally driven by a stepping motor (not shown), and an index 4 which is arranged along the rotation path of the pointer 41 and is provided with a numerical value indicating the aperture value.
2 and. A character index 420 made up of the character “P” is attached to one end of the index 42. Mode selection dial 4
When the aperture priority mode is selected and the command dial 5 is rotated, the set value of the aperture changes according to the rotation direction and the amount of rotation, and the pointer 41 rotates to the position indicating the set aperture value. When the program exposure mode is selected by the mode selection dial 4 (see FIG. 2), the pointer 41 moves to the character index 420.

FIG. 4 is a diagram showing the configuration of the control system of the camera according to this embodiment. In the figure, reference numeral 50 denotes a control device composed of a microcomputer and its peripheral parts, which performs sequence control of the camera and various calculations and executes a control program described later to display the display 9
The drive control of the counter display unit 10 is performed.

The control unit 50 is connected to the mode selection dial 4, the command dial 5, the AF mode button 6, the correction mode button 7, the self-timer button 8 and the display 9 as described above, and a photographing lens (not shown). A focal length detecting device 51 for detecting the focal length and a lens driving device 5 for driving the photographing lens according to a command signal from the control device 50.
2. Distance measuring device 53 for detecting subject distance, control device 50
A flash device 54 for illuminating an object according to a command signal from the watch 5, and a clock 5 for outputting information on the date and time.
5, film feeding device 56 for winding and rewinding film, and photographing frame number counting device 5 for counting the number of photographed frames
7. A half-press switch 58 that is turned on by half-pressing the release button 3 (see FIG. 2) described above, a release switch 59 that is turned on by fully-pressing the release button 3, and a film by driving a camera diaphragm or shutter. Exposure device 6 for exposing
A memory 61 that stores 0 and the current shooting condition is connected.

Then, the control unit 50 displays the set values of the focus mode and the aperture set by the AF mode button 6 and the like, the detected value of the distance measuring unit 53 and the calculated value by the control unit 50 itself. The exposure correction amount display unit 20, the distance display unit 30, and the aperture display unit 40 of No. 9 are controlled as described above, and the mode selection dial 4 is set to the index “P”, “A”.
Alternatively, when operated to the “T” position, the counter display processing shown in FIG. 5 is performed to control the display on the counter display unit 10.

In the process shown in FIG. 5, in step S1, it is judged whether or not the film is in the rewinding state based on the presence or absence of the film rewinding signal from the film feeding device 56. If it is not in the rewinding state, the process proceeds to step S2, and it is determined from the stored contents of the memory 61 whether or not the self-timer photographing is selected by the self-timer button 8. If not in the self-shooting state, the process proceeds to step S3, and it is determined whether the timer mode is selected by the mode selection dial 4. If the timer mode is not selected, the process proceeds to step S4, the pointer 11 of the counter display unit 10 is rotated to a position on the frame number index 12 corresponding to the current number of photographed frames, and the process is ended.

When it is determined in step S1 that the film is in the rewinding state, the process proceeds to step S11, and the pointer 11 is rotated to the rewinding index 13. In the next step S12, it is determined whether or not the rewinding is completed based on the presence / absence of the rewinding end signal from the film feeding device 56. If the rewinding is in the middle, the determination is repeated until the end. When it is determined that the rewinding is completed, the process proceeds to step S13, the pointer 11 is rotated to the film absence index 16, and the process is completed.

When it is determined in step S2 that the self-shooting state is set, the process proceeds to step S21, and it is determined whether or not the single timer is used for shooting. In the case of the single timer, the process proceeds to step S22, and the pointer 11 is rotated to the single timer index 14. When it is determined that the pointer is not the single timer, that is, the double timer, the process proceeds to step S23, and the pointer 11 is rotated to the double timer index 15. After rotating the pointer 11 to a predetermined position in steps S22 and S23, it is determined in step S24 whether or not self-shooting is completed (second timer shooting is completed in the double timer). The judgment is repeated before the self-shooting is completed. When it is determined that self-shooting has ended, the process proceeds to step S4, the current number of frames to be shot is displayed by the pointer 11, and the process ends.

When it is determined in step S3 that the time mode is selected (the mode selection dial 4 is in the "T" position), the process proceeds to step S31, and it is determined whether the half-push switch 58 is on. When the half-push switch 58 is on, the process proceeds to step S32, and the pointer 11 is rotated to a position corresponding to the number of photographed frames 0 on the frame number index 12 as shown by the dotted line in FIG. When the half-push switch 58 is off, the process proceeds to step S4.

After the processing of step S32, step S3
At 3, it is determined whether the release switch 59 is on.
When it is off, the process returns to step S31, and when it is on, the process proceeds to step S34. In step S34, the pointer 11 is rotated clockwise by 6 ° per second based on the clock signal output from the clock 55. In a succeeding step S35, it is determined whether or not the release switch 59 is off, and when it is on, the determination is repeated until it is turned off. Release switch 59
When it is determined that the number is off, the process proceeds to step S4, the current number of frames is displayed, and the process ends.

As is clear from the above, in the apparatus of the present embodiment, the number of frames indicator 12 provided on the rotation path of the single pointer 11 of the counter display unit 10 is kept to the minimum necessary, and the shooting frames are set in the empty space. Since the mode indicators 13 to 16 for displaying information other than the number are arranged, it is possible to efficiently use the space on the rotation path of the single pointer 11 to display various types of information, and to reduce the number of parts. Significant reduction is possible. By the way, in the example of FIG. 6, the mode indexes 13 to 1
Since 6 needs to be placed on the rotation path of another pointer,
Higher costs are unavoidable due to an increase in pointers and pointer drive systems.

Further, in the embodiment, the scale 12 of the piece number indicator 12
0 is arranged at a pitch of 6 ° from the rotation start position of the pointer 11 in the time mode, corresponding to the time unit, and
Since the mode indexes 13 to 16 are also arranged at a 30 ° pitch, which is an integral multiple of the rotation angle (6 °) of the pointer 11 corresponding to the time unit, with reference to the position corresponding to the number of imaged frames 0 on the scale 120, the frames are arranged. Even if the scale 120 of the number index 12 has only 36 frames, the timekeeping time can be instantly grasped by the relative positions of the mode indexes 13 to 16 and the pointer 11. FIG. 3 shows an example of the rotational position of the pointer 11 in the time mode.
At the solid line position in (a), 20 seconds have elapsed due to the number-of-frames index 12, 40 seconds have elapsed due to the rewind index 13 at the position in FIG. 3 (b), and single timer index 1 has been reached at the position in FIG. 3 (c).
4 and the double timer index 15 can instantly grasp the elapse of 47 to 48 seconds.

In the present embodiment, the frame number index 12 for displaying the number of frames to be photographed is followed by the rewind index 13 and the like at a pitch of 30 °, but the present invention is not limited to this, and the time counting unit is not limited thereto. If it is an integer multiple of the rotation angle of the pointer 11 corresponding to
An angular pitch different from 30 ° may be adopted. Guideline 11
The combination of the information displayed by is not limited to the number of image frames and other information, and various combinations may be adopted.

In the correspondence between the above embodiment and the claims,
The pointer 11 constitutes a rotation pointer, the clock 55 constitutes a timing means, and the frame number indicator 12 and the mode indicators 13 to 16 constitute indicators corresponding to a plurality of types of information. The case where the time mode is selected by the mode selection dial 4 corresponds to the timekeeping mode of the display device, and the other states correspond to the information display mode.

[0029]

As described above, according to the present invention, a plurality of types of indexes corresponding to a plurality of types of information are used as a reference, and the rotation angle of the rotary pointer corresponding to the time unit is set with reference to the start position of the rotary pointer in the timekeeping mode. Since it is arranged at an angular pitch that is an integral multiple of, the timekeeping time can be read instantly by the relative position of the rotary pointer and the index in the timekeeping mode, and multiple timetables can be read by the single rotary pointer in the information display mode. Information can be selectively displayed. Therefore, it is possible to efficiently display a plurality of types of information in a small space and to provide an inexpensive display device that can reduce the number of parts.

[Brief description of drawings]

FIG. 1 is a plan view of a rotary pointer type display device according to an embodiment of the present invention.

FIG. 2 is a top view of a camera incorporating the display device according to the embodiment of the invention.

FIG. 3 is a diagram showing an operation of a counter display unit 10 of FIG. 1 in a time mode.

4 is a block diagram showing a circuit configuration of a control system of the camera shown in FIG.

5 is a counter display unit 10 by the control device 50 of FIG.
6 is a flowchart showing the procedure of the display process of FIG.

FIG. 6 is a diagram showing an example of a rotary pointer type display device capable of selectively displaying the number of frames to be photographed and the time count.

[Explanation of symbols]

 9 indicator 10 counter 11 pointer 12 frame number index 13 rewind index 14 single timer index 15 double timer index 16 film absence index 20 exposure correction amount display section 30 distance display section 40 aperture display section 50 controller 55 clock

Claims (2)

[Claims] 1. A timekeeping mode in which a rotating pointer is rotated according to a timekeeping time of a timekeeping means provided in a camera, and an information display mode in which the rotating pointer is rotated according to information different from the timekeeping time. In a selectable camera display device, at least two types of information to be displayed in the information display mode are provided, and a plurality of information items to be displayed in the information display mode are provided on a rotation path of the rotary pointer. A plurality of types of indexes corresponding to the type information, with reference to the start position of the rotary pointer in the timekeeping mode, an angular pitch that is an integral multiple of the rotation angle of the rotary pointer corresponding to the timekeeping unit in the timekeeping mode. A display device for a camera, which is characterized in that 2. The information to be displayed in the information display mode is provided in at least two types including the number of filmed frames, and an index for displaying the number of filmed frames is displayed on the rotary pointer in the timekeeping mode. 6 per piece based on the start position
2. An index corresponding to other information is arranged on the rotation path of the rotary pointer at a pitch of .degree. Camera display device.