JP4779679B2 - Shake detection device, lens barrel, camera system - Google Patents

Description

  The present invention relates to a shake detection device, a lens barrel, and a camera system that can detect shake due to human hand shake or the like.

In a camera system capable of performing a shake correction operation, camera shake (including shaking, vibration, etc.) due to camera shake or the like is detected using an angular velocity sensor such as a gyro sensor. Thereafter, based on the information relating to the detected shake, a driving amount and a moving direction when driving the blur correction lens or the like are calculated by blur correction calculation. Then, the image blur during shooting is corrected by shooting while driving the blur correction lens in accordance with the driving amount and direction of the blur correction lens calculated by the blur correction calculation.
In addition to detecting camera shake, Patent Document 1 discloses a method of fixing a shock sensor (shock detection means) to the camera body.

However, in the conventional sensor fixing method, there is a problem that the detection accuracy is lowered due to floating of the attachment portion between the sensor and the electric substrate (the sensor and the substrate are tilted apart by solder or the like).
FIG. 6 is a diagram for explaining a problem of a conventional sensor fixing method, and is a view of a lens barrel viewed from the optical axis direction (front direction). FIG. 6 shows a case where the shake detection sensors 11 and 12 are fixed to the main body 101 of the lens barrel.
The shake detection sensors 11 and 12 are soldered onto a flexible printed wiring board (hereinafter referred to as FPC) 18. The shake detection sensors 11 and 12 are angular velocity sensors, and detect an angular velocity around a specific detection axis. Specifically, the shake detection sensor 11 detects an angular velocity in the yawing direction, and the shake detection sensor 12 detects an angular velocity in the pitching direction. Therefore, the FPC 18 is attached on the flat surfaces 101a and 101b of the lens barrel main body 101 in order to accurately position the detection axes of the shake detection sensors 11 and 12 in a necessary direction.

In the configuration as shown in FIG. 6, if the FPC 18 and the shake detection sensors 11 and 12 are in close contact with each other without being lifted, the substantially shake detection sensors 11 and 12 are disposed on the flat surfaces 101 a and 101 b of the lens barrel main body 101. The detection axes of the shake detection sensors 11 and 12 are arranged at desired angles (in FIG. 6, two directions orthogonal to each other indicated by broken lines).
However, for example, as shown in FIG. 6, when the shake detection sensor 11 floats from the FPC 18 by solder and the detection axis is inclined at an angle θ with respect to a desired direction, the following problems occur.
In the state where the shake detection sensor 11 is inclined by θ as shown in FIG. 6, when an angular velocity in the yawing direction is generated, the signal amplitude is attenuated to a value obtained by multiplying the original angular velocity by cos θ. When an angular velocity in the pitching direction occurs, the output is originally 0, but a signal having a value obtained by multiplying the angular velocity by sin θ is output. In addition, when tilted in the direction perpendicular to the paper surface, the angular velocity in the rotation direction is detected, and an error occurs in the same manner.
Accordingly, when the image blur correction amount is calculated based on these signals, there is a problem that an error occurs in the correction amount and an accurate blur correction operation cannot be performed.
Further, when the FPC 18 and the lens barrel main body 101 are fixed using an adhesive, a double-sided tape or the like, the elasticity of the FPC 18 may cause the FPC 18 to be lifted from the lens barrel main body 101 and cause the same error. There was also.
JP 2000-250113 A

  An object of the present invention is to provide a shake detection device, a lens barrel, and a camera system that can accurately detect a shake state.

In order to solve the above problems, the invention of claim 1 includes a first attachment portion, the body having a different second mounting portion and the first mounting portion, provided in contact with the first mounting portion and the A first shake detection unit that detects a shake of the main body, a second shake detection unit that is provided in contact with the second mounting portion and detects a shake of the main body, and the first shake detection unit provided on one end side. A first part that can be mounted, a second part that can mount the second shake detection unit provided on the other end side, and a bending part that is provided between the first part and the second part. a and a flexible printed wiring board, the flexible printed circuit board is configured to urge the first vibration detection unit by the urging force caused by the elastic deformation of the bent portion to the first mounting portion direction, the second deflection characterized in that biasing the detector to the second attachment portion direction A shake detection apparatus.
According to a second aspect of the present invention, in the shake detection device according to the first aspect, the first and second attachment portions include an adhesive member for attaching the first and second shake detection portions. Detection device.
According to a third aspect of the present invention, in the shake detection device according to the first or second aspect, the bending portion includes a first bending portion provided on the one end side and the other end than the first bending portion. And a second bending portion provided on the side .
According to a fourth aspect of the present invention, in the shake detection device according to any one of the first to third aspects, the first and second shake detection portions are in relation to the first and second attachment portions. The shake detecting device is characterized in that an electrical terminal is provided in a portion other than the surface to be attached.
According to a fifth aspect of the present invention, in the shake detection device according to any one of the first to fourth aspects, the first and second shake detection portions are biased toward the first and second attachment portions. The shake detecting device is characterized in that an urging member is provided.
According to a sixth aspect of the present invention, in the shake detection device according to any one of the first to fifth aspects, the first and second mounting portions are arranged at positions of the first and second shake detection portions. The shake detecting device is characterized by having a positioning shape portion to be determined.
A seventh aspect of the present invention is the shake detection device according to any one of the first to sixth aspects, wherein the first and second shake detection units are angular velocity sensors that detect an angular velocity around a detection axis. The shake detection apparatus is characterized in that the first and second attachment portions have the detection shaft in a direction orthogonal to a surface on which the first and second shake detection portions are positioned.
According to an eighth aspect of the present invention, in the shake detection device according to any one of the first to seventh aspects, the first and second mounting portions are provided on the inner peripheral side of the main body. and the flat surface, a second flat surface perpendicular to the first planar surface, the first vibration detection unit detects at least a portion of the surface shake of the body in contact with the first flat surface, said first 2 shake detection unit, detects a shake of said different body from the deflection at least part of the surface is detected by the first vibration detection unit in contact with the second flat surface, wherein the flexible printed wiring board, the first The first shake detection unit and the second shake detection unit are electrically connected to bias the first shake detection unit to the first flat surface and the second shake detection unit to the second flat surface. The shake detecting device is characterized by the following.
A ninth aspect of the present invention is a lens barrel including the shake detection device according to any one of the first to eighth aspects.
A tenth aspect of the present invention is a camera system including the shake detection device according to any one of the first to eighth aspects.

  According to the present invention, it is possible to provide a shake detection device, a lens barrel, and a camera system that can accurately detect a shake state.

  The purpose of making it possible to accurately detect the state of vibration is realized by improving the mounting configuration of the vibration detection unit.

FIG. 1 is a diagram for explaining the outline of the camera system according to the first embodiment.
The camera system of the first embodiment includes a lens barrel 100 having a shake detection device including shake detection sensors 11 and 12, and a camera body 200 to which the lens barrel 100 can be attached and detached.
The lens barrel 100 includes shake detection sensors 11 and 12, shake correction actuators 13 and 14, lens position detection sensors 15 and 16, a shake correction lens 17, and the like.
The camera body 200 has a release switch (SW) 201 and the like.

  The shake detection sensors 11 and 12 are shake detection units formed by an angular velocity sensor such as a gyro sensor. The shake detection sensors 11 and 12 detect angular velocities around two detection axes (X axis and Y axis) orthogonal to each other in a plane substantially perpendicular to the optical axis Z of the shake correction lens 17. -When the switch SW201 is operated, the acceleration components in each of these two directions are output. The shake around the Y axis is called yawing, the shake around the X axis is called pitching, and the blur correction operation normally corrects the image blur caused by the shake in these two directions. Is done. A mounting form of the shake detection sensors 11 and 12 will be described later.

The blur correction lens 17 forms a part of the photographing optical system, and is provided on a photographing unit (an image pickup device or a film) (not shown) disposed on the focal plane of the photographing optical system in a plane substantially orthogonal to the optical axis Z. On the other hand, it is a blur correction optical system that corrects image blur in the photographing unit by moving in a direction to cancel image blur of a subject image caused by shake due to camera shake of a photographer.
The shake correction actuators 13 and 14 are drive units that generate a drive force for moving the shake correction lens 17 and are arranged separately for driving in the X-axis direction and driving in the Y-axis direction. In this embodiment, voice coil motors are used for the blur correction actuators 13 and 14.

The lens position detection sensors 15 and 16 are position sensors for detecting the position of the blur correction lens 17 and are arranged separately for position detection in the X-axis direction and position detection in the Y-axis direction.
In the shake correction operation, the drive direction and drive amount of the shake correction lens 17 are calculated by a calculation unit (not shown) based on the detection results of shake by the shake detection sensors 11 and 12, and the shake correction actuators 13 and 14 are calculated according to the calculation results. The image blur correction lens 17 is driven and controlled using the lens position detection sensors 15 and 16 to correct the image blur.

FIG. 2 is a diagram illustrating how the shake detection sensors 11 and 12 are attached in the first embodiment. FIG. 2 shows the lens barrel 100 as viewed from the optical axis direction (front direction).
The main body 101 is a cylindrical member provided in the lens barrel 100. A flat surface 101 a orthogonal to the Y axis and a flat surface 101 b orthogonal to the X axis are provided as attachment portions of the shake detection sensors 11 and 12 on the outer peripheral portion of the main body 101.
The shake detection sensors 11 and 12 are provided with electrical contacts (not shown) so that the electrical contacts are electrically connected to a circuit pattern (not shown) formed on the flexible printed circuit board (FPC) 18. It is mounted on the FCP 18 using solder.
In addition, the shake detection sensors 11 and 12 are bonded and fixed using an adhesive so that the surface opposite to the FPC 18 and the flat surfaces 101a and 101b are directly bonded to each other.

Since the shake detection sensors 11 and 12 are thus bonded and fixed so that the surfaces opposite to the FPC 18 face the flat surfaces 101a and 101b, the shake detection sensor 11 is temporarily attached to the FPC 18 as shown in FIG. Even if the mounting is inclined (floating) by the solder 19, the detection axes of the shake detection sensors 11 and 12 are in the same direction as the Y axis and the X axis. Therefore, it is possible to prevent the occurrence of shake detection errors due to the tilt detection axes of the shake detection sensors 11 and 12 being fixed.
Therefore, accurate shake detection can be performed, and a highly accurate shake correction operation can be performed.

FIG. 3 is a diagram illustrating how the shake detection sensors 11 and 12 are attached in the second embodiment.
In the description of each embodiment described below, the same reference numerals are given to portions that perform the same functions as those of the already described embodiments, and repeated descriptions are omitted as appropriate.
In the first embodiment, the shake detection sensors 11 and 12 are fixed to the outer peripheral portion of the cylindrical main body 101. However, in the second embodiment, the shake detection sensors 11 and 12 are fixed to the inner peripheral portion of the hollow cylindrical main body 102. is doing.
As described above, the main body 102 is a hollow cylindrical member, and the flat surface 102a orthogonal to the Y axis and the flat surface 102b orthogonal to the X axis are attached to the shake detection sensors 11 and 12 on the inner peripheral portion thereof. It is provided as a part.
The shake detection sensors 11 and 12 are mounted on the FPC 18 as in the first embodiment. Further, the shake detection sensors 11 and 12 are bonded and fixed using an adhesive so that the surface opposite to the FPC 18 and the flat surfaces 102a and 102b are directly bonded to each other.

Here, the FPC 18 which is substantially planar in a normal state is used by bending two locations approximately 45 degrees along the cylindrical shape of the lens barrel. Therefore, the FPC 18 has a restoring force (an urging force due to elastic deformation) in a direction in which the bent portion is opened (a direction in which 45 degrees is reduced).
However, in the second embodiment, even when the restoring force of the FPC 18 works, the restoring force works so as to press the shake detection sensors 11 and 12 toward the main body 102, so that the shake detection sensors 11 and 12 are flat surfaces 102a. , 102b is not raised. Therefore, even when the adhesive force of the adhesive fixing portions of the shake detection sensors 11 and 12 becomes weak due to a change with time, the shake detection sensors 11 and 12 are prevented from being inclined away from the flat surfaces 102a and 102b. it can.

Similarly to the first embodiment, the shake detection sensors 11 and 12 are bonded and fixed so that the surface opposite to the FPC 18 faces the flat surfaces 102a and 102b. On the other hand, even if the shake detection sensor 11 is mounted tilted (floating) by the solder 19, the detection axes of the shake detection sensors 11 and 12 coincide with the Y axis and the X axis.
Therefore, the detection axes of the shake detection sensors 11 and 12 do not deviate from the Y axis and the X axis, so that accurate shake detection can be performed and a highly accurate shake correction operation can be performed.

FIG. 4 is a diagram illustrating how the shake detection sensors 11 and 12 are attached in the third embodiment.
In the third embodiment, leaf springs 21 and 22 are added to the second embodiment.
The main body 103 is substantially the same member as the main body 102 of the second embodiment, and further includes flat surfaces 103c and 103d to which the leaf springs 21 and 22 are attached.
The leaf springs 21 and 22 are urging members that are attached to the flat surfaces 103c and 103d and generate urging forces that press the shake detection sensors 11 and 12 against the flat surfaces 103a and 103b, respectively.
In the present embodiment, since the leaf springs 21 and 22 are added, the shake detection sensors 11 and 12 can be more stably fixed to the flat surfaces 103c and 103d. Therefore, shake detection with higher reliability can be performed.

FIG. 5 is a diagram illustrating how the shake detection sensors 11 and 12 are attached in the fourth embodiment.
In the fourth embodiment, a main body 104 provided with a positioning shape portion in the mounting portion is used instead of the main body 101 in the first embodiment.
The main body 104 is a cylindrical member provided in the lens barrel 100. In the outer peripheral portion of the main body 104, a flat surface 104a orthogonal to the Y axis and a flat surface 104b orthogonal to the X axis are provided in hole portions that are one step lower than the cylindrical outer peripheral shape. Therefore, a wall is formed around the flat surfaces 104a and 104b, and the shape of the wall (the shape of the hole portion) substantially matches the outer shape of the shake detection sensors 11 and 12, and The positioning shape portion determines the position in the direction orthogonal to the Y axis and the position in the direction orthogonal to the X axis of the shake detection sensor 12.
In this embodiment, since a hole is provided in the main body 104 and the shake detection sensors 11 and 12 are attached to these holes, in addition to the same effect as that of the first embodiment, it is orthogonal to the Y axis of the shake detection sensor 11. The position in the direction and the position in the direction orthogonal to the X axis of the shake detection sensor 12 can be accurately fixed. Therefore, it is a form that can be easily assembled, and more accurate shake detection can be performed.

(Modification)
The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also within the equivalent scope of the present invention.
(1) In each of the embodiments, the shake detection sensors 11 and 12 are fixed with an adhesive. However, the present invention is not limited to this. For example, the vibration detection sensors 11 and 12 may be bonded using another adhesive member such as a double-sided tape. Then, the shake detection sensors 11 and 12 may be attached in a form in which they are in direct contact with the main body without using an adhesive or the like. In the case where the shake detection sensors 11 and 12 are brought into direct contact with the main body without using an adhesive or the like, for example, the periphery of the shake detection sensors 11 and 12 may be bonded and fixed, or an urging force as in the third embodiment. A member may be used.

(2) In the fourth embodiment, the hole portion is formed as the positioning shape portion. However, the present invention is not limited to this. For example, a convex shape is appropriately provided on the flat surface corresponding to the shape of the shake detection sensors 11 and 12. May be.

(3) In each of the embodiments, the shake detection sensors 11 and 12 have been described as examples in which the tilt is restricted and fixed by the flat surface provided in the main body, but the present invention is not limited thereto. The inclination may be regulated by supporting 12 at three points.

(4) In each embodiment, the example in which the shake detection device is provided in the lens barrel 100 that can be attached to and detached from the camera main body 200 has been described. However, the present invention is not limited thereto, and for example, the shake detection device is provided in the camera main body. Alternatively, a shake detection device may be provided in a camera system in which lenses cannot be exchanged.

It is a figure explaining the outline | summary of the camera system of Example 1. FIG. It is a figure which shows the attachment form of the shake detection sensors 11 and 12 in Example 1. FIG. It is a figure which shows the attachment form of the shake detection sensors 11 and 12 in Example 2. FIG. It is a figure which shows the attachment form of the shake detection sensors 11 and 12 in Example 3. FIG. It is a figure which shows the attachment form of the shake detection sensors 11 and 12 in Example 4. FIG. It is a figure explaining the problem of the fixing method of the conventional sensor, and is the figure which looked at the lens barrel from the optical axis direction (front direction).

Explanation of symbols

11, 12: shake detection sensor, 18: flexible printed circuit board (FPC), 19: solder, 100: lens barrel, 101, 102, 103, 104: main body, 101a, 101b, 102a, 102b, 103a, 103b, 104a, 104b: flat surface

Claims (10)

A body having a first attachment portion and a second mounting portion that is different from the first attachment portion,
A first shake detection unit that is provided in contact with the first attachment part and detects a shake of the main body ;
A second shake detection unit that is provided in contact with the second attachment part and detects a shake of the main body;
A first part capable of mounting the first shake detection unit provided on one end side, a second part capable of mounting the second shake detection unit provided on the other end side, the first part, and the first part A flexible printed wiring board having a bent part provided between the two parts ,
The flexible printed wiring board urges the first shake detection part toward the first attachment part by an urging force generated by elastic deformation of the bent part , and the second shake detection part is directed toward the second attachment part. Energizing ,
A shake detection device characterized by the above. The shake detection apparatus according to claim 1,
An adhesive member for attaching the first and second shake detection units to the first and second attachment units;
A shake detection device characterized by the above . In the shake detection device according to claim 1 or 2,
The bent portion has a first bent portion provided on the one end side and a second bent portion provided on the other end side than the first bent portion,
A shake detection device characterized by the above. In the shake detection device according to any one of claims 1 to 3 ,
The first and second shake detection units are provided with electrical terminals on portions other than surfaces attached to the first and second mounting units,
A shake detection device characterized by the above. In the shake detection device according to any one of claims 1 to 4 ,
An urging member for urging the first and second shake detecting portions toward the first and second attachment portions;
A shake detection device characterized by the above. In the shake detection device according to any one of claims 1 to 5 ,
The first and second attachment portions have positioning shape portions that determine the positions of the first and second shake detection portions;
A shake detection device characterized by the above. In the shake detection apparatus according to any one of claims 1 to 6 ,
The first and second shake detection units are angular velocity sensors that detect an angular velocity around a detection axis, and are orthogonal to a surface on which the first and second shake detection units are positioned by the first and second attachment units. Having the detection axis in a direction to
A shake detection device characterized by the above. In the shake detection device according to any one of claims 1 to 7 ,
Said first and second mounting portion includes a first flat surface provided on the inner peripheral side of the body, a second flat surface perpendicular to the first planar surface,
The first vibration detection unit detects at least a portion of the surface shake of the body in contact with the first planar surface,
The second vibration detection unit detected a vibration of different said body and deflection of at least a portion of the surface is detected by the first vibration detection unit in contact with the second flat surface,
The flexible printed wiring board is electrically connected to the first shake detection unit and the second shake detection unit, and biases the first shake detection unit to the first flat surface and the second shake detection unit. Is urged to the second flat surface. A lens barrel comprising the shake detection device according to any one of claims 1 to 8 . A camera system comprising the shake detection device according to any one of claims 1 to 8 .

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