JPH085462Y2 - Camera shake detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a camera shake detection device, and more particularly, to a camera shake detection device that is positioned in a fixed direction in the camera when stationary and is shaken by the camera shake. The present invention relates to a camera shake detection device provided with a detector that is displaced relative to a camera and outputs an electric signal corresponding to the vibration.

[Conventional technology]

As is well known, camera shake tends to occur during operation of a low-speed shutter.To prevent this, either increase the shutter speed or use a tripod or some other method to hold the camera in a stable manner. It is necessary to activate.

In addition, depending on the type of camera, there is also a camera in which a camera shake warning is displayed in the viewfinder of the camera, for example, by blinking a lamp. In this case, the camera shake warning is issued before the exposure operation, and if the user wants to perform exposure at the initially set shutter speed, he only needs to be careful in advance. Depending on the degree and the like, a difference occurs depending on the operator. Even if the shutter speed is set to the same value, there is a difference that some people will shake the hand and others will not.

Therefore, in the above-described camera shake warning display, it is not possible to confirm whether or not there is camera shake during the shutter operation.

As a solution to this problem, there is a "camera automatic camera shake warning device" that displays a warning according to each shutter speed after the end of shooting, as disclosed in Japanese Patent Laid-Open No. 55-84925 (hereinafter, referred to as "first conventional technique"). Examples ”).

FIG. 14 is a block diagram showing the overall configuration of the first conventional example. In FIG. 14, reference numeral 1 denotes a vibration detector attached to the camera body, which detects vibration of the camera body during scanning of the shutter and outputs a signal proportional to the vibration acceleration.

The vibration detector 1 uses a voltage accelerometer. The voltage accelerometer outputs a signal that is proportional to the acceleration acting on the accelerometer itself, and there are two methods of extracting the signal: "voltage" and "charge".

The output of the vibration detector 1 is amplified by the amplifier 2 to a predetermined signal level and then sent to the comparator 4. The vibration discrimination reference signal Eref from the reference signal generation source 3 is input to the comparator 4. The reference signal generation source 3 outputs the above-described vibration determination reference signal Eref that can be output according to each shutter speed, based on the correlation between the shutter speed during shutter operation and the allowable vibration acceleration of the camera body. .

In the comparator 4, the vibration discrimination reference signal Eref and the amplifier 2
The vibration detection signal Eact amplified by is compared and the deviation output (camera shake signal Ev) is output as a comparison result to the calculator 5 (hereinafter referred to as "CPU").

The CPU 5 inputs the deviation output, determines whether or not the camera body is vibrated due to camera shake during shutter operation, and outputs it to the display 6.

The display 6 displays the determination result of the CPU 5 in the finder 9 by light such as an LED or sound by a sounding body.

In this case, when the shutter speed is set to 1/30 seconds or less, the CPU 5 outputs the camera-shake warning signal 11 to the display unit 6, displays the camera-shake warning display 13 in the viewfinder 9, and gives the photographer a notice in advance. To do.

Even if there is a risk of camera shake, if it is desired to shoot at the shutter speed as it is, the release switch can be pressed in that state.

At this time, if the comparison result of the comparator 4 indicates that the vibration detection signal Eact is larger than the vibration discrimination reference signal Eref (Eact> Eref), the comparator 4 outputs the camera shake signal Ev. The CPU 5 receives the camera shake signal Ev and outputs the discrimination reference control signal Em to the reference signal generation source 3, whereby the reference signal generation source 3 changes the setting according to the shutter speed at that time, As the shutter speed increases, the vibration discrimination reference signal Eref
Raise the level of.

In this way, from the shake signal Ev due to the deviation between the determined vibration discrimination reference signal Eref and the vibration detection signal Eact, the CP
U5 displays the shake notification display 14 in the viewfinder 9 after the image is taken.

As another example, Japanese Patent Laid-Open No. 58-70217 (hereinafter referred to as "second conventional example") discloses a "camera shake detection device".

FIG. 15 is a block diagram showing the overall configuration of the second conventional example. Reference numeral 20 in FIG. 15 is an acceleration detector. This acceleration detector 20 uses a "micromechanical acceleration detector" which is integrally formed with a metal oxide semiconductor (MOS) integrated circuit and is used for camera shake. It is installed in a place where The acceleration detector 20 is a sensor that detects acceleration due to mechanical vibration as a change in capacitance, and its output is a blocking oscillator 21 (hereinafter referred to as “oscillator”).
Is input to The oscillator 21 changes the frequency according to the change of the capacitance and outputs the output 22 to the fv (frequency-voltage) converter.
It is input to 23, converted there to a voltage output 24, and output to a threshold detector 25.

A signal corresponding to the exposure time of the shutter of the camera is applied to the control terminal 26 of the threshold detector 25, and the threshold level Vth of the threshold detector 25 is controlled by this signal. by this,
When the exposure time is long, the threshold level Vth of the threshold detector 25 is lowered, and conversely, when the exposure time is short, the threshold level Vth is raised. This threshold level Vth is the output of the threshold detector 25 only when the acceleration detector 20 detects an acceleration that causes “blur” on the shooting screen in relation to the exposure time.
27 becomes a high level.

The AND gate 29 takes the AND of the output 27 of the threshold detector 25 and the signal 28 synchronized with the opening and closing of the shutter, and the AND gate 29
Trigger a simple circuit 31 with an output of 30 and output 32 for about 1 second
Is output and the warning display device 34 is operated via the drive circuit 33.

As a result, the photographer knows that the image with “blurring” on the screen has been taken.

Further, FIG. 16 is a diagram of JP-A-59-222823 (hereinafter,
It is a block diagram which shows the whole structure of the "camera shake prevention camera" disclosed by the "3rd prior art example".

In FIG. 16, when the shutter release button SB is pressed to start the stroke operation, the vibration detector 41 is turned on based on the signal, and the vibration of the camera body is detected. As the vibration detector 41, for example, an acceleration pickup using a piezoelectric element or the like or a capacitance type displacement pickup is used. The vibration detector 41 converts the amount of vibration of the camera body into an electric signal, which is input to the calculator 42. The calculator 42 calculates the camera shake limit shutter speed and outputs the answer to the comparator 44 in the form of an electric signal.

On the other hand, the preset shutter speed from the shutter speed setting means 43 is also input to the comparator 44 in the form of an electric signal, and the comparator 44 receives the handshake limit shutter speed input from the calculator 42 and the shutter speed setting means 43. When the preset shutter speed is slower than the camera shake limit shutter speed, an output signal is output to the camera shake countermeasure means 45 to display a warning or the like. .

[Problems to be solved by the device]

However, the vibration detector 1 used in the above-mentioned first conventional example
, Which uses a piezoelectric accelerometer, outputs a signal compared to the acceleration acting on the accelerometer itself and has a relatively flat frequency characteristic, but it is suitable for high frequencies. , The frequency of camera shake is several Hz
Since it is 10 Hz and above, it is not necessarily ideal for detecting camera shake.

Further, in the first conventional example, the detection output of the vibration detector 1 is a minute output, and it is necessary to add a circuit such as an amplifier 2 for processing the output, so that the circuit configuration becomes complicated and expensive. There is a problem.

Further, the acceleration detector 20 in the second conventional example uses a semiconductor, and the chip area becomes large,
Unlike mass-produced products, there is a problem in that process technology is required and becomes very expensive.

Further, the vibration detector 41 of the third conventional example uses an acceleration pickup using a piezoelectric element or the like, or a capacitance type displacement pickup, and some of these may be destroyed by excessive acceleration. It may be difficult to take measures against.

The present invention has been made in view of the above circumstances. A first object of the present invention is that it can respond at a low frequency, is not destroyed by excessive acceleration, and has a microcomputer built-in circuit. An object of the present invention is to provide a camera shake detection device that can detect camera shake before shooting with software and has a simple structure and can be manufactured at low cost.

A second object of the present invention is that, in addition to being compact and simple, it can detect camera shake by reacting sharply to camera shake in the vertical and longitudinal directions of the camera, and the camera shake has stopped. An object of the present invention is to provide a camera shake detection device for a camera, in which the subsequent movement is rapidly attenuated.

Further, a third object of the present invention is to provide a camera shake detection device for a camera capable of detecting camera shake in all directions in response to camera shake in any of up, down, left and right directions. Especially.

[Means for solving the problem]

In order to achieve the first object, the device according to claim 1 is rotatably supported by the camera, and the predetermined portion is always provided even when the camera receives vibration of several Hz to several tens of Hz due to camera shake. A movable member having a heavy balancer in the predetermined portion so as to direct the direction of gravity, and having a regular pattern such as a slit that transmits light or a striped reflection pattern that reflects light, and Detection of projecting light onto the pattern of the movable member and receiving light passing through or reflected through the pattern to generate a pulsating electrical signal corresponding to relative rotation of the movable member with respect to the camera due to the camera shake And a determination unit for comparing the change of the output level of the detector with a preset reference level according to the shutter speed, and a determination unit for determining the presence or absence of camera shake. And a control unit for making the display unit give a hand shake warning in response to a determination result that hand shake is present.

Further, in order to achieve the second object, the invention according to claim 2 is such that the movable member has a substantially disc shape and is rotatably supported by a camera through a bearing and the camera is provided. Is provided with a heavy balancer at a predetermined portion so that the predetermined portion always points in the acting direction of gravity even when it receives a vibration of several Hz to several tens of Hz due to camera shake.

Further, in order to achieve the third object, the invention according to claim 3 is such that, as the movable member, the movable member has a spherical shape and is rotatably supported with respect to the camera, and the camera is It is characterized in that a heavy weight balancer is provided at a predetermined portion so that the predetermined portion always points in the direction of action of gravity even when it receives vibration of several Hz to several tens of Hz due to camera shake.

[Action]

In the camera shake detection device according to claim 1 configured as described above, the movable member holds a certain posture in the camera when the camera is stationary, and when the camera shakes, the camera shakes against the camera. The relative position changes. Due to this change in the relative position, the detector undergoes a pulsating change in light transmission or light reflection due to a change in the position of the pattern formed regularly on the movable member facing the detector.
As a result, the detector detects a pulsed signal that corresponds to camera shake, so after performing appropriate signal processing on this pulsed signal, the determination unit determines whether there is camera shake according to the size of the detection result. judge.

Further, in the camera shake detection device of the camera according to claim 2 configured as described above, the movable member is formed into a disk having a part that is heavier than the other part, and the heavy part is gravitational force. However, when the camera shakes, the movable member relatively swings around the shaft fulcrum with the portion with a large weight acting as the point of action of the moment, so that the pattern of the movable member is detected. The position of the camera changes sharply, and the camera shake can be detected by the detector.

Further, in the camera shake detector according to claim 3 configured as described above, the movable member is formed in a spherical shape, and when the camera is stationary, a portion that is heavier than other portions is always oriented in a direction in which the weight is heavy. When the camera shakes, the movable member rotates in the left-right front-back 360-degree direction relative to the camera body with the heavy portion acting as a point of action of the moment, and the pattern for the detector is displaced. Therefore, the detector in this case can detect camera shake in all directions of the camera.

〔Example〕

An embodiment of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a block diagram showing the overall configuration. In FIG. 1, reference numeral 51 denotes a movable member, which is arranged at a predetermined position in the camera body (not shown), and is formed into a disc shape or a spherical shape, and has a regular surface on its surface, as described later in detail. A reflective pattern of light or a transmissive pattern of light is provided.

The displacement of the movable member 51 is detected by a detector 52. The detector 52 shown in FIG. 1 is a light emitting diode (hereinafter, referred to as “LED” 52a and a phototransistor 52).
It consists of b.

As the detector 52, a phototransistor receives the reflected light reflected by the reflection pattern of the movable member 51, or the phototransistor 52b receives the light from the LED 52a through the transmission pattern of the movable member 51. There are two methods of receiving light. In either method, the relative acceleration of the movable member 51 with respect to the camera body is detected, and thereby the camera shake of the camera is detected.

The relationship between the movable member 51 and the detector 52 is, for example, the second
It is configured as shown in the drawings and FIG.

In the embodiment of FIGS. 2 and 3, a disk-shaped photo interrupter plate 51a is used as the movable member 51, and light transmission holes (slits) of the same shape are formed at equal angular intervals along the vicinity of the outer peripheral edge thereof. ) A plurality of 51b are formed and patterned. At the center of the photo interrupter plate 51a,
A shaft 51c is provided, and as shown in FIG. 3, the shaft 51c is rotatably supported by a bearing 53a at a predetermined position of the camera body 53.

A transmissive photointerrupter 52c including a light projecting element and a light receiving element as a detector 52 is arranged in the camera body 53 so that they face each other with a light transmitting hole 51b portion of the photointerrupter plate 51a interposed therebetween. Has become.

Here, the description returns to FIG. A power supply voltage is applied to the terminal A on the anode side of the LED 52a and the terminal B on the collector side of the phototransistor 52b, and the output of the phototransistor 52b is output from the collector, which is the output terminal, to the amplifier 54. To the output detector 55.

The output detection unit 55 processes the output level of the phototransistor 52b that changes depending on the degree of camera shake of the camera body 53 so that it can be easily detected, and the output change unit as a determination unit.
It is designed to output to 56, and an input port for an analog / digital (hereinafter, "A / D") conversion unit of a microcomputer (hereinafter, "microcomputer") or a normal input port can be used. The output detection unit 55 detects whether the output voltage of the pass-through photointerrupter 52c is high or low, and then sends the detected output to the output change determination unit 56.

The output change determination unit 56 may use a microcomputer arithmetic function, which is a software comparison function, and compares the output of the transmissive photointerrupter 52c with a preset reference level according to the shutter speed. The presence or absence of camera shake is determined.

The output of the output change determination unit 56 is sent to the control unit 57. The control unit 57, based on the determination of the presence or absence of camera shake in the output change determination unit 56, causes the display unit 58 to display information such as camera shake warning, flash information, shutter speed, aperture, etc., aperture, shutter speed, film sensitivity, subject. Luminance,
In addition to calculating the exposure conditions based on the exposure information of the release switch, etc., in particular, when a camera shake signal is received from the output change determination unit 56, a faster shutter speed control output is applied to the automatic exposure unit 59. , Is supposed to control this.

The amplification unit 54, the output detection unit 55, the output change determination unit 56,
A microcomputer can be used for the control unit 57.

The operation of this embodiment thus configured will be described.

When a photo interrupter plate 51a as shown in FIGS. 2 and 3 is used as the movable member 51 and a transmissive photo interrupter 52c is used as the detector 52, when the camera body 53 is stationary, the photo interrupter plate 51a has a shaft 51c. Are supported by bearings 53a in a stationary state.

The output of the transmissive photo interrupter 52c at this time is
As shown in the section (ii) in FIG. 4, the output level does not change, and the output is amplified by the amplifier 54, and the output detector 55
Then, it is detected that the level is low and is sent to the output change determination unit 56. The output change determination unit 56 determines that there is no change in the output of the transmissive photo interrupter 52c, and outputs it to the control unit 57. At this time, the controller 57 displays the display means 58.
The camera shake LED or the like is not driven, and the command for changing the shutter speed is not issued to the automatic exposure means 59.

Next, if camera shake occurs in the camera body 53,
Although 53 vibrates, the photo interrupter plate 51a is lightly supported by the bearing 53a and has a large mass, so that it does not follow the movement of the camera body 53, and the left and right directions relative to the camera body about the axis 51c. Turn to.

As a result, the light emitted from the LED of the transmissive photointerrupter 52c (the light of the LED 52a in FIG. 1) is interrupted intermittently by the light transmissive holes 51b formed in the photointerrupter plate 51a at regular intervals to form a pattern. Therefore, the amount of light transmitted through the light transmission hole 51b changes according to the amount of camera shake. The light transmitted through the light transmission hole 51b is received by the phototransistor 52b of the transmissive photointerrupter 52c, and from the phototransistor 52b, sections (i) and (iii) in FIG.
As shown by, the output whose level changes according to the magnitude of the camera shake is generated. This output is appropriately amplified by the amplification unit 54, and then the output detection unit 55 detects the level of the output of the amplification unit 54, and the output change determination unit 56 determines that there is camera shake. The result of this determination is sent to the control unit 57. In response to the output of the output determination unit 56, the control unit 57 displays a handshake LED or the like on the display unit 58 to give a handshake warning, and also causes a display prompting the use of a strobe and a strobe light emission, or The automatic exposure means 59 is caused to select a faster shutter speed.

As described above, according to this embodiment, when the camera shakes, the change of the light transmission amount of the patterned light transmission hole 51b due to the swing of the photo interrupter plate 51a is detected by the transmission type photo interrupter 52c as the detector 52. Since the change in output level is determined by the output change determination unit 56 to determine the camera shake, there is an advantage that it reacts sharply to the camera shake and can be manufactured with a simple structure at low cost.

Further, not only it can respond to low-frequency vibration at high speed, but it can be configured by a microcomputer built-in circuit and software control, and it is small in size and there is no fear of destruction even if it receives an excessive acceleration.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.

For example, in this embodiment, a disk-shaped photo interrupter plate 51a is used as the movable member 51. However, as shown in FIG. 5, the photo interrupter plate 51a is heavier than the other parts at a predetermined position (mass of the mass). Balancer by material
51d may be provided so that the part of the balancer 51d faces vertically.

By doing so, it is possible to improve the responsiveness of relative movement of the photo interrupter plate 51a with respect to the camera body 53 when the camera body 53 shakes in a direction other than the vertical direction, and at the same time, the camera shake is reduced. There is an advantage that the movement of the photo interrupter plate 51a after being cut can be quickly attenuated.

FIG. 6 is a perspective view of the case where a reflective photo reflector is used as the movable member 51.

In the case of FIG. 6, a reflection pattern 51f in which a portion that reflects light and a portion that does not reflect light are alternately arranged at predetermined intervals is provided on the outer peripheral surface of the detection disk 51e, and as shown in FIG. Place this in the space within 53 and use this reflective pattern 51
A detector 52, which is a reflective photoreflector 52d composed of an LED 52a and a phototransistor 52b, is opposed to f. The detection disk 51e of the present embodiment is the second
In the same way as in FIGS. 3, 3 and 5, the camera body 53
When oscillating at the time of hand shake, the amount of light emitted from the LED 52a and reflected by the reflection pattern 51f is pulsatingly applied to the phototransistor 52b, so that the output of the phototransistor 52a changes accordingly, and Similarly, camera shake can be detected.

FIG. 8 shows that a balancer 51d having a larger mass (heavier) than other portions is provided on the peripheral surface portion of the detection disk 51e as shown in FIGS. 6 and 7 as in the case of FIG. Also,
The same effect as in the case of FIG. 5 is obtained.

Further, as the detection disc 51e, as shown in FIG. 9, a reflection pattern 51g may be provided instead of the light transmission hole 51b shown in FIG.
The shaft 51c may be provided in 1e or may not be provided as in FIG. For this reflection pattern 51g, the sixth
The reflection type photo-reflector 52d as the detector 52 as shown in FIG. 7 and FIG. 7 is arranged so as to face each other and is configured to detect camera shake.

In this case, it goes without saying that a balancer 51d as shown in FIGS. 5 and 8 may be provided as shown in FIG.

FIG. 11 shows a pattern 51 of a portion reflecting the mosaic light on the surface of the sphere 51i as the movable member 51 and a portion not reflecting it.
is the formation of j.

As shown in FIG. 12, the sphere 51i is a camera body 53.
It is placed in the inner space so that it can be rotated 360 degrees in all directions.
A reflection type photo reflector 52d is arranged as a detector 52 as shown in FIG. 6 so as to face the reflection pattern 51j of 1i.

By doing so, when the camera body 53 is shaken by hand, the spherical body 51i relatively rotates in all directions of 360 degrees, and the reflective reflector 52d is changed in accordance with the position change of the reflective pattern 51j with respect to the reflective reflector 51h. The amount of received light changes, and camera shake can be detected.

At a predetermined position of such a sphere 51i, the above-mentioned FIGS.
By providing the balancer 51d similar to the case of FIG. 10 and FIG. 10 as shown in FIG. 13, the balancer 51d is oriented in the direction in which gravity is applied when the camera body 53 has no camera shake.
When camera shake occurs, the sphere 51i can rotate in the entire 360-degree direction with a portion of the balancer 51d acting as a point of action of the rotation moment, and camera shake can be detected.

Furthermore, the detecting disk 51e in FIG. 7 and the sphere 5 in FIG.
In order to reduce the resistance of the surface of 1i and the inner surface of the space of the camera body 53, mirror finishing or other surface treatment is applied, or lubrication is applied, or the same degree as the detection disk 51e, sphere 51i, etc. A transparent liquid (alcohol,
It is preferably placed in a container filled with oil, water, etc.).

[Effect of device]

As described above in detail, according to the invention as set forth in claim 1, even if the camera is rotatably supported by the camera and the camera receives vibration of several Hz to several tens of Hz due to camera shake, the predetermined portion is always gravitational force. And a movable member having a regular pattern such as a slit that transmits light or a striped reflection pattern that reflects light, and a movable balancer that is provided with a heavy balancer in the predetermined portion so as to direct the action direction of A detector that projects light onto the pattern of the member and receives light that passes through or is reflected through the pattern to generate a pulsating electrical signal corresponding to the relative rotation of the movable member with respect to the camera due to the camera shake. And a judgment means for judging the presence or absence of camera shake by comparing the change in the output level of the detector with a preset reference level according to the shutter speed, and the camera shake from this judgment means. Since it has a control unit that gives a shake warning to the display means in response to the presence / absence determination result, it has a simple structure and can be manufactured at low cost, and it is optimum for camera shake detection of the camera Hz ~ 10
It has a low frequency response of Hz, and there is no danger of damaging the movable member etc. even if it receives an excessive acceleration.In particular, when the posture of the camera is set to the normal horizontal position, the movable member is Even if it is held in a position or in an upside down position, the predetermined part always points in the acceleration direction of gravity, and the relative change with respect to the camera in response to camera shake is detected based on that direction. Using a gimbal mechanism and a gimbal mechanism, the gyro is always locked at a fixed angle position like a conventional camera with a camera shake display function that detects camera tilt, and the frame is rotated and activated prior to the shooting start operation. There is no need to perform complicated operation control such as releasing the lock after holding the camera toward the subject, and it is possible to detect the hand portion of the extremely simple control camera quickly and surely, and It is possible to provide a vibration detection device for a camera capable of displaying tell.

According to the invention as set forth in claim 2, since the movable member is formed into a disk shape and has a portion having a heavier weight than other portions at a predetermined position, in addition to the above effect, the center of gravity is always vertical. It is oriented in the direction, and when camera shake occurs,
When the movable member responds sharply to the camera about the axis and the camera shake is stopped, the attenuation of the swing motion is quickly attenuated, and a camera shake detection device for the camera that can be prepared for the next camera shake detection can be provided. .

Further, according to the invention as set forth in claim 3, since the movable member is a sphere and is configured to have a portion having a heavier weight than other portions at a predetermined position, the effect of the invention as set forth in claim 1 In addition, it is possible to provide a camera shake detection device for a camera that can detect camera shake in any direction.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of a camera shake detecting device according to the present invention, and FIG. 2 is a first concrete embodiment of a movable member and a detector applied to the present invention. FIG. 3 is a cross-sectional view showing a state in which the movable member and the detector of FIG. 2 are attached to the camera body, and FIG.
FIG. 5 is an output waveform diagram of a detector for explaining camera shake detection according to the embodiment shown in FIG. 5, FIG. 5 is a front view of a second concrete embodiment of a movable member applied to the present invention, and FIG. FIG. 7 is a perspective view of a third concrete embodiment of a movable member and a detector applied to the invention, FIG. 7 is a sectional view showing a state in which the movable member and the detector of FIG. FIG. 9 and FIG. 9 are perspective views of the fourth and fifth concrete examples of the movable member applied to the present invention, and FIG. 10 and FIG.
Front and perspective views of sixth and seventh concrete examples of the movable member applied to the present invention, and FIG. 12 is a perspective view of the movable member and the detector of FIG. 11 attached to the camera body. Fig. 13 and Fig. 13 show the movable member according to the eighth embodiment of the present invention.
FIG. 14 is a perspective view of a concrete example of the present invention, FIG. 14 is a block diagram showing the overall configuration of the first conventional example, FIG. 15 is a block diagram showing the overall configuration of the second conventional example, and FIG. It is a block diagram which shows the structure of a prior art example. 51 ... Movable member, 51a ... Photointerrupter plate, 51b ...
… Light transmission hole, 51d …… Balancer, 51e …… Detecting disk, 51f, 51g, 51j …… Reflecting pattern, 51i …… Sphere, 52…
… Detector, 52a …… LED, 52b …… Phototransistor, 5
2c …… Transmissive photointerrupter, 52d …… Reflective photoreflector, 53 …… Camera body, 54 …… Amplifier, 55…
… Output detection unit, 56 …… Output change determination unit, 57 …… Control unit,
58 …… Display means, 59 …… Automatic exposure means.

Claims (3)

[Scope of utility model registration request] 1. A camera is rotatably supported by a camera, and even if the camera receives a vibration of several Hz to several tens of Hz due to a hand shake, a weight of the predetermined portion is always directed so that the predetermined portion always points in the direction of gravity. A large balancer is provided and a movable member having a regular pattern such as a slit that transmits light or a striped reflection pattern that reflects light, and the pattern is projected and the light is projected onto the pattern of the movable member. A detector that receives light passing through or reflected through the detector to generate a pulsating electric signal corresponding to the relative rotation of the movable member with respect to the camera due to the camera shake; and a change in the output level of the detector and a preset value. A judgment means for judging the presence or absence of camera shake by comparing it with a reference level corresponding to the shutter speed, and the display means for judging the presence of camera shake by this judgment means. A camera shake detection device for a camera, comprising: a control unit for issuing a warning. 2. The movable member has a substantially disc shape, is rotatably supported by a camera via a bearing, and has a predetermined portion even if the camera receives a vibration of several Hz to several tens of Hz due to camera shake. 2. The camera shake detection device for a camera according to claim 1, wherein a heavy balancer is provided at the predetermined portion so that the head always points in the direction of action of gravity. 3. The movable member has a spherical shape and is rotatably supported with respect to the camera, and even if the camera receives a vibration of several Hz to several tens of Hz due to camera shake, a predetermined portion of the movable member always has a gravity direction. 2. The camera shake detection device for a camera according to claim 1, wherein a heavy balancer is provided at the predetermined portion so as to direct the light.