JPH0561091A - Camera capable of detecting jiggle - Google Patents

Abstract

PURPOSE:To arrange a jiggle detecting sensor without making the size a camera in its height direction large. CONSTITUTION:The camera has a first space 1j surrounded and formed by a lens barrel 3, a front body 1a, and a spool room external wall 1i, a second space 1k surrounded and formed by the lens barrel, the front body, and a cartridge room external wall 1g, and at least, a part or the whole of one jiggle detecting sensor, is arranged in the first space 1j and the second space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of detecting a blur having a built-in blur detecting sensor.

[0002]

2. Description of the Related Art Conventionally, as a camera of this type, as shown in FIG. 10, acceleration sensors 102a, 102b, 103 are used.
Align the sensitivity axes of a and 103b in parallel with the incident optical axis L,
The acceleration sensors 102a and 103a are connected to the release button 104.
It is arranged near a and the other acceleration sensor 10
It is known that 2b and 103b are arranged at positions facing the acceleration sensors 102a and 103a apart from each other (Japanese Patent Laid-Open No. 63-125923). In FIG. 10, the incident optical axis L
The z axis is oriented in the direction, the x axis is oriented in the horizontal direction, and the y axis is oriented in the vertical direction.

Generally, camera shake has a rotational component parallel to or about one axis. But,
This blurring, which is mainly rotational blurring in general photography, is considered as a vector, and therefore, for a blurring vector component around each axis, two acceleration sensors are required in a plane including the vector.

In the actual use condition of the camera, when the xyz axes are taken as described above, the object of the blurring is the normal release button 104 due to the release operation or the like.
From the position of “a”, the angle deviation around the x-axis and the y-axis has a large value with the wrist as the fulcrum. Therefore, the detection by the four acceleration sensors is sufficient for the angular blur.

That is, in the conventional camera as described above,
The acceleration sensors 102a and 102b are used for angular blur about the x axis on the yz plane, and the acceleration sensors 103a and 103b are used for angular blur about the y axis on the xz plane.
By using b, detection corresponding to each blur is enabled.

[0006]

However, in the above-described conventional camera, two acceleration sensors 102a and 103a are arranged near the release button 104a as a camera shake detection sensor (hereinafter referred to as a shake detection sensor). It is configured to do.

In a general camera, a battery case, a half-press switch, a release switch, etc. are mounted in high density near the release button 104a. If two acceleration sensors are arranged in such a narrow space, they are inevitably located above the film spool chamber or above the battery case, which increases the height above the camera.

Further, since the respective acceleration sensors need to be arranged facing each other with respect to the rotation axis, the acceleration sensor 103b is provided above the camera, and the height above the camera. Cause increase. Further, since the acceleration sensor 102b is arranged below the spool chamber, the size of the camera in the downward direction is increased.

That is, in the conventional camera capable of detecting blurring, since the acceleration sensors are arranged so as to face each other with a sufficient distance for detection, it is possible to detect a blurring vector which greatly influences photographing. When the acceleration sensor is arranged as in the conventional case, there is a problem in that the height of the camera increases in the vertical direction.

The present invention has been made in view of the above-mentioned conventional problems, and provides a camera capable of detecting a blur in which a blur detecting sensor can be arranged without increasing the size in the height direction. The purpose is to

[0011]

In order to solve the above-mentioned problems, a camera capable of detecting blur according to the present invention has a lens barrel or a dark box, a front body, an outer wall of a spool chamber and an outer wall of a cartridge chamber, and has a blur detecting sensor. In a camera capable of detecting blurring having a built-in camera, a first lens body formed by being surrounded by the lens barrel or the dark box, the front body, and the outer wall of the spool chamber.
And a second space (1k) formed by being surrounded by the lens barrel or the dark box, the front body, and the exterior wall of the cartridge chamber, and at least one of the blur detection sensors. Is partially or entirely arranged in the first space or the second space. An acceleration sensor can be used as the blur detection sensor.
Further, a vibration gyro can be used as the shake detection sensor.

[0012]

According to the present invention, since the shake detection sensor is arranged in a space in the camera that is almost unused, it is not necessary to increase the size of the camera in the vertical direction.

[0013]

The present invention will be described in detail below with reference to the drawings and the like. 1 to 4 are views showing a first embodiment of a camera capable of detecting blur according to the present invention. FIG. 1 is a schematic perspective view, FIG. 2 is a transverse sectional view, and FIG. 3 is a front body removed. And FIG. 4 is a circuit block diagram.
In FIG. 1, 1 is a camera body, 3 is a lens barrel, 5 is a viewfinder, 7 is a release button, 9 is a back cover, and L is an optical axis.

As shown in FIG. 2, the camera body 1 is composed of a front body 1a and a rear body 1b. The rear body 1b is provided with a cartridge chamber 1c for accommodating and stably holding the cartridge 11, and a spool chamber 1d for winding and accommodating the film 13 having been photographed onto the spool 15, both of which are exposed at the opening. It is arranged so as to sandwich 1e. Further, the cartridge chamber 1c is partitioned by an inner wall 1f and an outer wall 1g, and the spool chamber 1d has an inner wall 1h.
And the outer wall 1i.

On the other hand, the front body 1a is provided with an opening near the center thereof. The lens barrel 3 is inserted into the opening of the front body 1a, attached by a conventionally known method such as adhesive caulking, and integrated with the front body 1a.

Inside the lens barrel 3, along the optical axis L, there are a convex lens group 17, a concave lens group 19, and a convex lens group 2.
1 is arranged. In addition, each lens group 17, 19, 2
1 is simply represented by one lens. Of these, the concave lens group 19 moves back and forth along the optical axis L in the direction of the arrow in FIG. 2 to perform focus adjustment. The drive means 25 is also for driving the concave lens group 19 for focus adjustment, and for example, a helicoid, a linear motor or the like can be used.

The lens driving means 23 is for driving the convex lens group 21, and the optical axis is defined by a signal processed by the camera shake prevention calculating means on the basis of an output from a shake detection sensor described later. For example, by moving the convex lens group 21 in the direction of the arrow in FIG. 2 in a vertical plane,
When the camera vibrates, the captured image is prevented from moving with respect to the film surface (camera shake). A voice coil motor or the like can be used as the lens driving means 23. The movement of the convex lens group 21 is as shown in FIG.
It is performed in both the x-axis direction shown in FIG. 3 and the y-direction shown in FIG.

The board 33 is a board on which electronic components such as a shake detection calculation circuit are mounted, and is fixed to the camera body 1. Reference numeral 22 denotes a shutter / aperture, which is shown in a closed state in FIG.

FIG. 3 is a front view showing a state in which the front body 1a is removed from the camera body 1 while leaving the finder 5 and the lens barrel 3 from FIG. In the figure, below the shutter button 7, a half-press switch 8 that activates an electronic circuit of a control system of the camera by half-press operation of the shutter button 7, and a release switch 9 that operates the exposure mechanism of the camera by full-press operation thereof. Are arranged.

A narrow space 1k (second space) is formed between the lens barrel 3 and the outer wall 1g of the vertically elongated cylindrical cartridge chamber 1c extending in the y direction in FIG. A narrow space 1j (first space) is formed between the outer wall 1i of the cylindrical spool chamber 1d and the lens barrel 3. Since the lens barrel 3 is a cylinder, these two spaces 1k and 1j have a shape that is narrow at the center and widens toward the upper and lower ends. In conventional cameras, it is extremely difficult to arrange components in such a space, and many cameras have been left as an empty space.

In this embodiment, as shown in FIG. 3, the acceleration sensors 27, 29 and 31 which are camera shake detection sensors are arranged in spaces where both ends of the spaces 1k and 1j are widened. The acceleration sensors 27, 29, 31 are fixed to the camera body 1 with an adhesive or the like, and are attached so as to move integrally with the camera body 1. Although the acceleration sensors 27 and 29 appear to overlap with the lens barrel 3 at the broken line portion in the cross-sectional view shown in FIG. 2, in reality, as shown in FIG. It is stored in the upper and lower part of 1j. This is the acceleration sensor 3
The same applies to 1. Such an acceleration sensor 2
With the arrangement of 7, 29 and 31, it is possible to effectively use the spaces 1k and 1j which have not been used conventionally. Further, by providing the acceleration sensors 27 and 31 on the shutter button 7 side where the blur amount is likely to increase, blur detection is facilitated.

These three acceleration sensors 27, 29, 3
1 has its sensitivity axis oriented in the optical axis direction, that is, in the direction parallel to the z axis in FIG. Therefore, as shown in FIG. 3, if the gap formed between the acceleration sensor 31 and the acceleration sensor 27 is set to the interval L ₁ , these acceleration sensors 31,
By dividing the difference between the outputs of 27 by the interval L ₁ , the angular acceleration d ² θ _x / dt ² around the x axis in FIGS. 3 and ² can be obtained. Similarly, the acceleration sensor 27 and the acceleration sensor 2
If a gap formed between the 9 and spacing L _2, by dividing the difference between the outputs of the acceleration sensors 27, 29 at intervals L _2, the angular acceleration d ² θ _Y / dt ² around the y-axis is obtained ..

That is, the output of the acceleration sensor 31 is z ₃₁ , the output of the acceleration sensor 27 is z ₂₇ , and the acceleration sensor 2 is
If the output of 9 is z ₂₉ , the angular acceleration about the x-axis is d ² θ _x / dt ² = (z ₃₁ −z ₂₇ ) / L ₁ ... The angular acceleration about the y-axis is d ² θ _Y / dt ² = (z ₂₇ −z ₂₉ ) / L ₂ ... Here, t is time.

Therefore, as shown in FIG. 4, in the shake detection calculation means 41, the angular acceleration calculation means 41 integrates the angular acceleration obtained by using the equation (2) twice by each integration means to set each integration constant. By means of formula, 2
By obtaining two integration constants, the rotational displacements θ _X and θ _Y of the camera shake, which is the vibration of the camera, can be detected from the outputs from the shake detection sensor, that is, the acceleration sensors 27, 29, 31.

Next, the shake prevention calculation means 43 calculates the convex lens group 21 based on the rotational displacements θ _X and θ _Y of the camera shake.
Calculate how much to move. Then, the blur prevention calculation means 43 operates the lens driving means 23 to move the convex lens group 21 so that the subject image on the film surface does not move relative to the film even if the camera vibrates. The camera shake can be prevented.

In this embodiment, the acceleration sensor 2
Although 7, 29 and 31 are configured to be fixed to the rear body 1b, they may be fixed to the mounting substrate 33 that moves integrally with the camera. At this time, the mounting board 33 must be a rigid body that moves together with the camera from 0 to several tens of Hz of vibration.

As described above, according to the present embodiment, by arranging the acceleration sensor which is the blur detection sensor in the space which has not been conventionally used inside the camera, the space inside the camera is used without waste and the camera is moved up and down. The size of the anti-vibration camera can be reduced without increasing the size in the direction.

5 to 7 are views showing a second embodiment of a camera capable of detecting blur according to the present invention. FIG. 5 is a transverse sectional view and FIG. 6 shows a state in which a front body is removed. FIG. 7 is a vertical sectional view of a plane including the optical axis. In this embodiment, the same components as those in the first embodiment described above are designated by the same reference numerals, and duplicated description will be omitted.

5 and 6, reference numeral 51 denotes a vibrating gyro vibrating reed of the angular velocity sensor (hereinafter, abbreviated as vibrating gyro), which directly detects the angular velocity of the camera about the y-axis in FIGS. 6 and 7. .. Further, in FIG. 6 and FIG.
Reference numeral 53 is also the same vibration gyro, and directly detects the angular velocity of the camera around the x-axis in FIGS. 5 and 6.

In the case of the second embodiment, these two vibrating gyros 51 and 53 are used as shake detection sensors.
This vibrating gyroscope is disclosed in Japanese Unexamined Patent Publication No. 2-82164, has a vertically long shape as shown in FIG. 8, and can detect an angular velocity about an axis in the longitudinal direction.

In this embodiment, two vibrating gyros 5 are used.
The longitudinal directions of 1, 53 are arranged at right angles or substantially right angles inside the camera, and rotation angular velocities of the cameras in two directions are detected. As described above, when the vertically long vibration gyros 51 and 53 are used as shake detection sensors, the spool chamber 1j and the lens barrel 3 have a narrow gap 1j as shown in FIG. It is possible to store by utilizing the portion resulting from the rounded shape of the outer wall 1i.

The substrate 55 shown in FIGS. 6 and 7 is a substrate which moves integrally with the camera body 1 from 0 to several tens Hz, and the vibration gyro 53 is attached to the substrate 55. The vibrating gyro 53 includes legs 53 that support the vibrating gyro 53.
a and 53b are provided at the nodes of the vibration so as not to affect the vibration of the vibration gyro 53.

The substrate 33 also moves integrally with the camera body 1 from 0 to several tens Hz as described above, and the vibration gyro 51 is attached to the substrate 33. Similarly, the vibration gyro 51 is also provided with legs 51 a and 51 b at the vibration node of the vibration gyro 51.

In the second embodiment, the vibration gyros 51 and 53 are used as the shake detection sensor, and the angular velocity of the camera is directly detected. Therefore, the rotational angular displacement can be obtained only by integrating the sensor output by one order. , Can detect camera vibration. That is, if the output of the vibration gyro 51 is y ₅₁ and the output of the vibration gyro 53 is x ₅₃ , the relationship of dθ _y / dt = y ₅₁ ... Dθ _x / dt = x ₅₃ . However, t is time.

As shown in FIG. 9, in the camera shake detection calculation means 61, the equations and are integrated once, and the integration constant is determined by the integration constant setting means. And in FIG.
A rotation angle theta _x of x-axis of the camera shown in FIG. 6, the rotation angle theta _y around the y-axis is obtained as an output.

The rotation angle θ _x and the rotation angle θ _y are angular displacements of the camera with reference to a specific time selected in the sequence control of the camera, for example, the time when the release switch 10 is turned on. .. According to these rotation angles θ _x and θ _y , even if the camera is vibrated and moved by operating the lens driving unit 23 via the blur prevention calculation unit 43,
As in the first embodiment, by moving the convex lens group 21 so that the subject image does not move relative to the film surface, camera shake can be prevented.

In the second embodiment, one of the two vibrating gyros is installed in the narrow space 1j between the outer wall 1i of the spool chamber and the lens barrel 3 as shown in FIG. 5 or 6. However, it may be provided in the narrow space 1k between the lens barrel 3 and the outer wall 1g of the cartridge chamber on the opposite side with the lens barrel 3 interposed therebetween. In addition, the other one vibrating gyro 1
Although it is provided at the widened portion of the lower end of j, it may be provided at the upper end of the space 1j or at the widened portion of the lower end of the space 1k.

According to the second embodiment, since the angular velocity of the camera can be directly measured by using the vibration gyro, the camera shake can be detected even when the camera is rotating at a constant velocity. Further, since the rotational angle displacement of the camera can be obtained by one integration, the calculation time is short and the camera shake detection speed is high. Furthermore, since only two shake detection sensors are required, the arrangement is easy and the board etc. can be omitted, and the shake detection can be performed at low cost. Furthermore, since the two shake detection sensors can be arranged close to each other, it is possible to regard them as a rigid body between them and the detection accuracy is improved.

As described above, in the first and second embodiments, the case where the lens barrel 3 is inserted into the inside of the camera body 1 has been described, but the rear portion of the lens barrel 3 is a rectangular parallelepiped dark box. Also in the case and the like, when the outer dimension is inscribed to the outer diameter of the lens barrel 3, the blur detection sensor can be arranged as in the first and second embodiments of the present invention. Therefore, the present invention can be applied even when the blur detection sensor is arranged around the mirror box of the single-lens reflex camera.

In this embodiment, the speed sensor for detecting camera shake and the vibrating gyro have been described, but other sensors such as, for example, whether the camera captures images vertically or horizontally, It is also possible to mount a sensor that controls photometry or the like.

[0041]

As described above in detail, according to the present invention, in the conventional camera, a space that is rarely used, that is, a space between the lens barrel and the outer wall of the patlane chamber, and the lens barrel and the cartridge are used. Since the shake detection sensor is arranged in the space between the outdoor walls, it is possible to realize a vibration-proof camera capable of preventing camera shake without increasing the size of the conventional camera. Therefore, a clear photograph without camera shake can be taken with a compact camera.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a camera capable of detecting blur according to the present invention.

FIG. 2 is a cross-sectional view of the camera according to the first embodiment.

FIG. 3 is a front view of the camera of the first embodiment.

FIG. 4 is a block diagram showing a camera according to the first embodiment.

FIG. 5 is a sectional view showing a second embodiment of a camera capable of detecting blur according to the present invention.

FIG. 6 is a front view of a camera according to a second embodiment.

FIG. 7 is a vertical sectional view of a camera according to a second embodiment.

FIG. 8 is a perspective view showing a vibrating gyro adopted in the camera according to the second embodiment.

FIG. 9 is a block diagram showing a camera according to a second embodiment.

FIG. 10 is a perspective view showing a conventional camera capable of detecting blur.

[Explanation of symbols]

 1 camera body 3 lens barrel 5 viewfinder 7 release button 9 back cover 27, 29, 31 acceleration sensor 51, 53 angular velocity sensor 1i spool outer wall 1g patrone outer wall 1j, 1k space

Claims (3)

[Claims] 1. A camera having a lens barrel or a dark box, a front body, an outer wall of a spool chamber and an outer wall of a cartridge chamber and having a built-in blur detection sensor, wherein the lens barrel or the dark box and the front body are provided. There is a first space formed by being surrounded by the outer wall of the spool chamber, and a second space formed by being surrounded by the lens barrel or the dark box, the front body, and the outer wall of the cartridge chamber. A camera capable of detecting blur, wherein at least a part or all of the blur detection sensor is arranged in the first space or the second space. 2. The camera capable of detecting blurring according to claim 1, wherein the blurring detection sensor is an acceleration sensor. 3. The camera capable of blur detection according to claim 1, wherein the blur detection sensor is a vibration gyro.