JP2606775Y2 - Dial setting type electronic camera - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera in which a shutter speed is set by a dial which can be rotated.

[0002]

2. Description of the Related Art In recent years, electronic cameras employ a system in which exposure factors such as a shutter speed and an aperture value are displayed as digital values on an external LCD display unit or a finder. In this type of camera, when these values are manually changed, the values can be changed by moving a switch member provided on the camera. In this case, it is possible to increase or decrease the shutter speed and the aperture value by selecting the operation direction of the switch member.

[0003]

In this type of camera, for example, when the shutter speed is set manually, particularly when the shutter speed displayed on the external LCD display unit or in the viewfinder is to be changed, the switch member is set. You may be confused for a moment in which direction to operate,
If the shutter is operated in the reverse direction by mistake, the shutter speed is changed in the reverse direction, and it takes time to correct the shutter speed to a desired value, and a shutter chance may be missed.

[0004] In view of the above, a camera which sets a shutter speed by a rotary dial used in a conventional camera has been reconsidered. In such a camera, since the shutter speed scale is displayed on the scale plate of the shutter dial, the photographer need only manually rotate the shutter dial to match the shutter speed scale with the index, in this case, the direction of rotating the dial Can be recognized immediately and quick changes can be made.

However, when this shutter dial is applied to an electronic camera, if an appropriate shutter speed is automatically set in an exposure circuit inside the camera, the shutter speed on the shutter dial indicated by the index is set. And the actual shutter speed is different. In such cases, this type of camera
The actual shutter speed is displayed on the external LCD display or in the viewfinder, but displaying different shutter speeds on the display and the shutter dial in this way may cause the photographer to make a mistake. Is not preferred. SUMMARY OF THE INVENTION An object of the present invention is to provide a dial setting type electronic camera configured to be able to display an exposure factor automatically set by the camera on a dial.

[0006]

According to the present invention, in a camera having a dial which is manually rotated to set an exposure factor, a plurality of light emitters corresponding to the exposure factor scale are equally arranged around the dial, Before obtained by exposure calculation with camera
The illuminant corresponding to an appropriate value of the exposure factor is selectively emitted as an index, and the exposure of the dial with respect to the index is performed.
The scale of the factor is configured to be rotated. Also,
The exposure factor display provided on the dial scale plate is formed of a light transmitting material, and a plurality of light emitters corresponding to each exposure factor display are equally arranged on the back side of the scale plate, and the exposure calculation by the camera is performed.
The illuminant corresponding to the appropriate value of the exposure factor obtained in the above is selectively emitted as an index, and the index is applied to the index.
The ear exposure factor display is configured to rotate.
You. Alternatively, the dial is a dial ring that is manually rotated, and a scale plate coaxially arranged on the dial ring and rotatable independently of the dial ring, and having an exposure factor scale provided on the surface thereof, A motor that is supported by the dial ring and that rotates the scale plate when energized; and that the motor and the scale plate are integrally rotated when the dial ring is manually rotated. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an embodiment of a camera to which the present invention is applied. A shutter dial 3 that is manually rotated when setting a shutter speed is disposed on a decoration 2 of a single-lens reflex camera 1. . This shutter dial 3
Is configured to be able to set a shutter speed by changing a signal input to an exposure circuit inside the camera by rotating the camera, but a detailed description thereof is omitted here. Further, the camera 1 is configured to be able to perform photographing at a different shutter speed regardless of the shutter speed set by the shutter dial during program automatic exposure photographing or aperture priority photographing.

The camera 1 is provided with an operation button 4 called a hyper button. When the photographer presses the hyper button at the time of manual photographing in which the photographer sets the aperture and the shutter speed arbitrarily, the operation button 4 The camera is automatically set to the most appropriate aperture value and shutter speed for shooting. Therefore, after the exposure is properly set by pressing the hyper button 4, the photographer can operate the shutter dial 3 to perform intentional photography while performing exposure correction, for example. Such an imaging mode is called hyper manual imaging.

The details of the shutter dial 3 will be described. 2A is a plan view, and FIG. 2B is a sectional view taken along line AA. The shutter dial plate 11 is formed in a flat short cylindrical shape, and the upper surface thereof is configured as a scale plate 12 for displaying a shutter speed. The scale plate 12 is provided with a shutter speed scale 13 for displaying a shutter speed in a circumferential direction. It is printed at the arranged position. In this embodiment, the scale plate 12 is divided into 16 equal parts in the circumferential direction, and 16 different shutter speed scales 13 are arranged. A rotary shaft 14 protruding from the center of the lower surface of the shutter dial board 11 is rotatably supported by a sleeve 2 a provided on the camera upper lid 2, and a brush plate 15 is provided at a lower end of the rotary shaft 14. It is fixed by screws 16.
A click groove 15 a is formed on the surface of the brush plate 15, and the click ball 1 provided inside the concave portion of the camera upper lid 2 by a spring 17 is formed in the click groove 15 a.
8 is hit. As a result, a click is stopped at a rotation position corresponding to the shutter speed scale 13 with the rotation of the shutter dial board 11.

A plurality of conductive brushes 19 are provided on the lower surface of the brush plate 15, and are slidably contacted with a surface of a code plate 20 fixed and supported in a camera body below the brush. The code plate 20 has a conductive foil of a required pattern formed on a surface thereof, so that the rotational angle position of the brush plate 15 is converted into a coded electric signal by the conductive brush 1.
9 to the exposure circuit. Therefore, the exposure circuit can detect the rotational position of the shutter dial board 11 from the electric signal. In addition, the camera upper lid 2 is provided around the shutter dial board 11 with the same number as the number of graduations corresponding to the shutter speed graduation 13, here, 16 LEDs (light emitting diodes) 2.
1 are arranged at equal intervals in the circumferential direction. Each LED 21 is connected to an exposure circuit inside the camera,
The LED selected by the control of the exposure circuit is turned on.

Here, as shown in FIG. 3, each LED 21 at 16 rotational positions of the shutter dial board 11 is set to a PV.
Values are set to “PV0” to “PV15”. That is, the exposure circuit can handle the index position as the PV value. Further, as shown in FIG. 4, the values of the shutter speed scales are respectively set as the DTV values corresponding to the TV values “TV-4” to “TV11” of the 16 types of shutter speeds as “DTV values”.
V-4 "to" DTV11 ". In other words, the data obtained from the sliding contact between the code plate 20 and the brush plate 15 makes it possible to detect the rotational position state of the shutter dial board 11 as a DTV value.

An operation of setting a shutter speed in manual shooting in a camera in which such setting is performed will be described with reference to a flowchart of FIG. The PV value is set to an initial value “0” simultaneously with the start of exposure (S1: step S1, the same applies hereinafter). Also, based on the information on the brush plate,
The rotation position of the shutter dial at that time, ie, DTV
The value is read (S2). Next, it is determined whether or not the hyper button has been pressed (S3). If the button has not been pressed, it is determined that normal manual shooting has been performed, and the process jumps to step S7, where the PV value “0” set in step S1 is set. Is turned on, and this LED is set as an index of the shutter dial. In the exposure circuit, "TV
= DTV-PV ”(S8). At this time,
When the TV value is smaller than “−4”, “TV = TV”
"+16" is set as the TV value (S9). Then, this TV value is captured as a TV value in the exposure circuit (S
10) Operate the electronic shutter at that speed. If the initial value of the PV value in step S1 is other than "0", the LED 21 corresponding to the PV value is turned on to serve as an index.

On the other hand, when the hyper button has been pressed in step S3, the exposure circuit calculates an optimum shutter speed based on the manual aperture at that time, and
The value is determined (S4). Then, "PV = DTV-T
V "(S5). The obtained PV value is "0"
If smaller than the above, "PV = PV + 16" is set as the PV value (S6). Then, the LED 21 corresponding to the obtained PV value is turned on. As a result, the optimal shutter speed at that time is the shutter speed of the shutter speed scale 13 in which the LED 21 illuminated corresponding to the rotational position of the shutter dial board 11 at that time is displayed as an index.

For example, in FIG. 6A, first, the LED 21 having the PV value of “0” is turned on (displayed as a black circle).
When the shutter button is set to “1/2000” and the hyper button is pressed, the exposure circuit calculates the PV value and obtains “PV = 2”. Thereby, as shown in FIG. 6B, the LED 21 having the PV value of “2” is set this time.
Is displayed, indicating that the optimal shutter speed is “1/500”. On the other hand, when the photographer performs photographing at a desired shutter speed, the shutter dial board 11 is manually rotated as shown in FIG. What is necessary is just to match "1/125". Therefore, the photographer can check the optimal shutter speed by looking at the shutter dial 3 and can set the desired shutter speed. In addition, this makes it possible to easily and quickly perform hyper manual shooting.

According to the shutter dial,
At the time of aperture priority photographing, for example, as shown in FIG. 7A, if the shutter dial board 11 is set to “A” automatically for the lit LED 21 having the PV value “0”, FIG. The optimal T obtained in steps S7 to S9 shown in FIG.
LE corresponding to the shutter speed “1/250” with the PV value “4” in this example, the optimum shutter speed based on the V value
D21 can also be lit as shown in FIG. 7B to display the current shutter speed. In this case, if the LED 21 having the first PV value “0” is turned on, it can be continuously displayed that the current shutter speed setting is automatic “A”.

FIG. 8 shows a second embodiment of the present invention.
This is a modification of the first embodiment. FIG. 2A is a plan view,
(B) is a cross-sectional view taken along the line BB, in which parts equivalent to those in the first embodiment are denoted by the same reference numerals. In this embodiment, the LED 21 as an index is arranged in the shutter dial board 11 and the scale plate 12 of the shutter dial board 11 is transmitted to perform display. That is, the scale plate 12
Is formed of a transparent material 12a through which light can be transmitted to indicate the shutter speed, and the camera upper lid 2 in the shutter dial board 11 has 16 L's in the circumferential direction.
ED21 is arranged. On the lower surface of the scale plate 12, a radial light-shielding wall 22 is integrally provided at a position between the respective shutter speed scales 13, and the light-shielding wall 22 allows the adjacent LED 21 to be positioned between the adjacent shutter speed scales 13.
From leaking from each other.

The click ball 18 is attached to the brush plate 15
Is supported by the camera upper lid 2 on the side of the
The click mechanism is constituted by cooperating with the click groove 15a formed on the peripheral surface of the click mechanism. The operation of displaying the shutter speed in the shutter dial having this configuration is exactly the same as in the first embodiment. However, in this embodiment, since the LED 21 is incorporated in the shutter disc 11, LE 21
Since the D21 is not exposed at the top of the camera, it can be made compact and is preferable in design, and since the shutter speed at that time is directly displayed on the scale plate, there is an advantage that the shutter speed becomes easy to see. . FIGS. 9A to 9C are diagrams showing a state in which the shutter speed is displayed, and are diagrams showing the state at the time of hyper-manual photographing, as in the case of FIGS. 6A to 6C.

FIGS. 10A and 10B show a third embodiment of the present invention, in which FIG. 10A is a plan view, and FIG. 10B is a cross-sectional view taken along the line C--C, which is equivalent to the first and second embodiments. Are denoted by the same reference numerals. In this embodiment, the index is fixedly provided on the top lid of the camera, while the scale plate of the shutter dial is configured to be independently rotatable.
That is, this shutter dial has a cylindrical dial ring 11A, and a transparent window 11B is formed by fitting a circular transparent plate into the upper opening. A scale plate 12 is rotatably mounted in the dial ring 11A, and a rotary shaft 14 of the scale plate 12 is rotatably supported with respect to the camera upper lid 2. The dial ring 11A has a circular main plate 23 integrally at the bottom thereof, and a shaft hole 23a is opened in the main plate 23. The shaft hole 23a is formed around the rotary shaft 14 of the scale plate 12. , The dial ring 11A is configured to be rotatable with respect to the scale plate 12. The rotation of the dial ring 11A is moderated by a click mechanism composed of a spring 17 and a click ball 18 provided on a part of the lower surface of the dial ring and a click groove 2a provided in the camera upper lid 2.

On the upper surface of the scale plate 12, a shutter speed scale 13 is described. A brush plate 15 is fixed to the lower end of the rotating shaft 14 with screws 16.
The conductive brush 19 provided on the brush plate 15 is slid on the conductive foil of the code plate 20 fixed in the camera body. A small motor 24 composed of an iron core 24a, a drive coil 24b, and a rotor magnet 24c is disposed in a space below the scale plate in the dial ring 11A, and is fixedly supported by the master plate 23. . A small gear 25 is attached to the rotation shaft of the rotor magnet 24c, that is, the rotation output shaft 24d of the motor.
Is engaged with a large gear 26 integrally formed on the lower surface of the gear via a reduction gear 27. A power brush 28, which is electrically connected to the small motor 24, protrudes downward from the lower surface of the master plate 23, and slides on a conductive foil of a power board 29 provided on the camera lid 2 below the dial ring 11A. Power is supplied to the small motor 24 by this sliding contact.

Therefore, in this shutter dial, when the dial ring 11A is turned by hand,
The master plate 23 integrated therewith is rotated, and the small motor 24 fixedly supported on the master plate 23 is revolved around the rotation shaft 14. At this time, since the small gear 25 of the small motor 24 is not rotated, the large gear 26 meshed with the small gear 24, that is, the scale plate 12, is rotated integrally with the dial ring 11A. Therefore, by rotating the dial ring 11A, the scale plate 12 is also rotated, and the shutter speed scale 13 described on the scale plate 12 is displayed for the index. The rotation position at this time is the scale plate 12.
The brush plate 15 and the code plate 20, which are integrally rotated, are taken into the exposure circuit by sliding contact. On the other hand, even when the dial ring 11A is not rotated, when the small motor 24 is energized to rotate the small gear 25, the reduction gear 27
, The gear wheel 26, that is, the scale plate 12 is rotated. Therefore, the scale plate 12 is rotated in the dial ring 11A, and the shutter speed scale is displayed on the fixed index 30. Even in this case, the rotation of the scale plate 12 is taken into the exposure circuit by the sliding contact between the brush plate 15 and the code plate 20.

For this reason, the shutter dial exhibits the function at the time of hyper-manual photographing, for example, as in the first and second embodiments. However, in this embodiment, the index 30 is fixed and the scale plate 12 rotates. As a result, the index position is relatively changed. That is,
As shown in FIG. 11A, the shutter speed is “1/200”.
When the hyper manual shooting state is set when “0” is set, the small motor 2 is powered by the exposure circuit.
As the dial 4 is rotated, the scale plate 12 is rotated independently of the dial ring 11A. As shown in FIG. 11B, the shutter speed scale 13 for the index is set separately from the rotational position of the dial ring 11A by manual operation. Is changed to the shutter speed “1/500”. Then, if the dial ring 11A is rotated thereafter, the scale plate 12
Since the shutter speed is also rotated integrally with the shutter speed, the shutter speed can be set to a desired "1/125" as shown in FIG.

Therefore, in the third embodiment, a plurality of LEDs are not required, and it is possible to reduce the battery consumption for causing them to emit light. Since the index position is fixed, the shutter speed does not become difficult to read as in the first and second embodiments in which the index position is moved. In this embodiment, since the LED is not provided corresponding to the dial, the setting of the PV value is set according to the rotational position of the dial. Here, in the above embodiments, the present invention is applied to a dial for setting a shutter speed, but may be applied to a dial for setting an aperture value.

[0023]

As described above, according to the present invention, a plurality of luminous bodies corresponding to the exposure factor scale are equally arranged around a dial which is manually operated, and the illuminant obtained by exposure calculation with a camera is obtained.
The illuminant corresponding to the appropriate value of the exposure factor is selectively illuminated and used as an index, and the exposure factor of the dial is compared with the index.
By configuring the child scale to be rotated, the exposure factor set by the camera can be displayed on the exposure factor scale using the illuminant, and the effect of increasing the convenience of shooting can be obtained. is there. Also, the exposure factor indication provided on the dial scale plate is formed of a light transmitting material,
And evenly placed a plurality of light emitters on the rear side of the scale plate, turtle
The appropriate value of the exposure factor obtained by the exposure calculation in
The corresponding luminous body is selectively illuminated and used as an index.
Rotate the exposure factor display on the dial with respect to
With such a configuration , the luminous body is not exposed to the outside of the camera, the appearance is enhanced, and the exposure factor can be suitably displayed. Further, the dial includes a manually operated dial ring, a scale plate of an exposure factor scale that can be rotated independently of the dial ring, and a motor supported by the dial ring to rotate the scale plate, By configuring so that the motor and the scale plate are integrally rotated when the dial ring is rotated by manual operation, it is possible to realize the display of the exposure factor with a fixed index without using a light-emitting body, The exposure factor scale when the index position is changed does not become difficult to read.

[Brief description of the drawings]

FIG. 1 is an external view of an embodiment of the camera of the present invention.

FIG. 2 is a plan view of the shutter dial according to the first embodiment of the present invention and a sectional view taken along line AA of FIG.

FIG. 3 shows a PV for setting a shutter dial position.
It is a figure showing an example of a value.

FIG. 4 is a diagram illustrating a relationship between a TV value and a DTV value of a shutter speed.

FIG. 5 is a flowchart showing a shutter speed setting operation in the camera of the present invention.

FIG. 6 is a schematic diagram illustrating an operation of a shutter dial during hyper manual shooting.

FIG. 7 is a schematic diagram showing an operation of a shutter dial during aperture priority shooting.

FIG. 8 is a plan view of a shutter dial according to a second embodiment of the present invention and a sectional view taken along line BB of FIG.

FIG. 9 is a schematic diagram illustrating an operation of a shutter dial at the time of hyper manual photographing in the second embodiment.

FIG. 10 is a plan view of a shutter dial according to a third embodiment of the present invention and a cross-sectional view taken along line CC of the shutter dial;

FIG. 11 is a schematic diagram showing an operation of a shutter dial at the time of hyper manual shooting in the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Camera 2 Decoration 3 Shutter dial 4 Hyper button 11 Shutter dial board 12 Scale plate 13 Shutter speed scale 15 Brush plate 20 Code plate 21 LED 22 Light shielding wall 24 Small motor

Claims (5)

(57) [Scope of request for utility model registration] 1. A camera comprising a dial for setting the exposure factor is rotated manually, evenly placed a plurality of light emitters corresponding to the scale of the exposure factors around the dial, before
The exposure factor obtained by the exposure calculation with the camera
An index by selectively emitted light emitter corresponding to the value, those
Rotate the scale of the exposure factor of the dial with respect to the index
A dial-setting electronic camera, wherein the electronic camera is configured to be positioned . 2. A camera provided with a dial which is manually rotated to set an exposure factor, wherein an exposure factor indication provided on a dial plate of the dial is formed of a light transmitting material, and each exposure plate is provided on a back side of the dial plate. A plurality of luminous bodies corresponding to the factor scale are arranged at equal intervals , and the values obtained by the exposure calculation with the camera are obtained.
The illuminant corresponding to an appropriate value of the exposure factor is selectively emitted as an index, and the exposure of the dial with respect to the index is performed.
A dial setting type electronic camera, wherein a factor display is configured to be rotated . 3. Light emission for selectively emitting light as said index.
The body is exposed to the exposure factor during one shooting mode of the camera.
Illuminant set as the initial value of
The initial value of the exposure factor in the imaging mode different from the imaging mode
One of the illuminants set as a value different from the value,
Or both of them.
A dial-setting electronic camera as described. 4. A camera provided with a dial which is manually rotated to set an exposure factor, wherein the dial is manually rotated and a dial ring which is coaxially arranged on the dial ring and is independent of the dial ring. A scale plate that is rotatable and has an exposure factor scale provided on its surface, and a motor that is supported by the dial ring and rotates the scale plate when energized,
A dial-setting electronic camera, wherein the motor and the scale plate are integrally rotated when the dial ring is manually rotated. Wherein said exposure factor shutter speed or claims 1 to any description of dial setting electronic camera 4 is squeezed.