JPH04328532A - Image blurring correction device - Google Patents

Abstract

PURPOSE:To provide an image blurring correction device having a lock means whose positioning accuracy with respect to the movable center of an optical axis decentering means is excellent and whose impact resistance is excellent. CONSTITUTION:The lock means is constituted of a first lock member 81 which is provided with an engagement hole 81a and integrally coupled to the optical axis decentering means 33 and a second lock member 82 which has an inclined part 82c and a flat part 82d, which is movably provided on the fixing part 31 of the concerned device or the decentering means 33 and which locks the decentering means 33 at a prescribed position by engaging the flat part 82d with the hole 81a of the first lock member 81 through the inclined part 82c.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to optical axis decentering means for optically correcting image blur caused by vibrations applied to an imaging optical system, and a locking means for locking the optical axis decentering means at a predetermined position. The present invention relates to an improvement of an image blur correction device equipped with the following.

0002

2. Description of the Related Art Various devices for correcting image blur in cameras have been proposed in the past, such as Japanese Patent Application No. 1-17190.
There are No. 8 etc. This is to eliminate image blur by driving a correction optical system, which is an optical axis decentering means, in a plane perpendicular to the optical axis based on camera shake information detected by a shake detection sensor.

In this type of device, the correction optical system (correction lens) is driven and controlled by an actuator during shake correction, but when shake correction is not performed, the correction optical system is restrained by the actuator. When the light is released, it becomes possible to move freely in a plane perpendicular to the optical axis, which causes the following problems.

1) When carrying the camera or accidentally dropping it, the correction optical system (correction lens) may move and collide within the mechanism, causing damage.

2) When photographing without image stabilization, the correction optical system is located below the movable range due to its own weight, so
You end up photographing the image in a degraded state.

[0006] In order to solve these problems, a mechanism is required to hold the correction optical system at the original position when no blur correction is performed.

[0007] Therefore, Japanese Patent Publication No. 57-37852, Japanese Patent Application Laid-Open No. 61-296862, etc. have been proposed regarding this mechanism.

[0008] In the former type, a gimbal for image stabilization is held and fixed by a ring and a claw. On the other hand, in the latter, a pin, which is a locking member, enters and engages a conical recess, which is a locked member, thereby fixing a lens barrel in which an optical system and an image pickup device are integrated.

[0009]

However, there are the following problems when applying the conventional example to a shift type correction optical system.

That is, in the conventional example, the movable part for blur correction rotates in the yaw and pitch directions. Therefore, the weight of the movable part is applied to the rotation support part, that is, the bearing. Therefore, even if the camera or the like is dropped, no large impact will be applied to the locking mechanism. In other words, the locking mechanism does not have sufficient impact resistance to be applied to a shift type correction optical system. For example, in Japanese Patent Publication No. 57-37852, when a shock is applied to the gimbal, a large load is applied to the rotating pin of the lock pawl, and in Japanese Patent Publication No. 61-296862, the conical recess acts as a wedge and is connected to the lock pin. A large load will be generated on the contact, which may damage the locking mechanism.

SUMMARY OF THE INVENTION In view of the above-mentioned points, an object of the present invention is to provide an image blur correction device that has locking means that has high accuracy in positioning the optical axis decentering means to the movable center and has excellent shock resistance.

0012

[Means for Solving the Problems] The present invention provides a first locking member having an engagement hole and integrally coupled to an optical axis eccentric means or a fixing portion of the device, and a sloped portion and a flat portion. is movably provided on the fixed part or the optical axis eccentric means of the device, and the optical axis eccentricity is caused by the engagement of the flat part with the engagement hole of the first locking member through the inclined part. A second locking member for locking the means in a predetermined position constitutes a locking means.

[0013]

[Operation] In the locking means, one of the first and second locking members is integrally connected to the optical axis decentering means, and the other is provided on the fixed part of the device, and one of the locking members is allowed to enter into the other. In other words, the optical axis decentering means is locked in a predetermined position by engaging the engagement hole of the first locking member with the flat portion of the second locking member.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on the illustrated embodiments.

FIG. 3 is a diagram showing the configuration of the main parts of a single-lens reflex camera equipped with a first embodiment of the present invention.

In FIG. 3, CMR is a camera body, and LNS is an interchangeable lens that can be attached to and detached from the camera body CMR.

First, the configuration of the CMR side of the camera body will be explained.

The CCPU is an in-camera microcomputer (hereinafter referred to as microcomputer), which is a one-chip microcomputer having ROM, RAM, and A/D conversion functions. The in-camera microcomputer CCPU performs a series of camera operations such as automatic exposure control, automatic focus adjustment, and film winding according to the camera sequence program stored in the ROM. To this end, the camera microcomputer CCPU communicates with peripheral circuits and lenses within the camera body CMR to control the operations of each circuit and lens.

LCM is a lens communication buffer circuit,
Power is supplied to the lens LNS through the power line VL, and power is supplied from the camera body CMR to the lens LNS via the signal line DCL, and from the lens LNS to the camera body C.
It serves as an inter-lens communication buffer for output via the signal line DLC to MR.

SNS is a line sensor for focus detection (hereinafter simply referred to as sensor) composed of a CCD, etc., and SDR is its drive circuit, which drives the sensor SNS according to instructions from the microcomputer CCPU in the camera, and receives data from the sensor SNS. It takes in the image signal, amplifies it, and sends it to the camera's microcomputer CCPU.

[0021] The light from the lens LNS is transmitted to the main mirror MM.
, focus glass PG, and pentaprism PP to the photometric sensor SPC, and its output signal is input to the in-camera microcomputer CCPU and used for automatic exposure control (AE) according to a predetermined program.

DDR is a switch detection and display circuit that switches the display of the camera's display member DSP based on data sent from the microcomputer CCPU in the camera, and turns on and off various camera operation members (SWMD). - Notifies the camera's microcomputer CCPU of the off state via communication.

SW1 and SW2 are switches linked to a release button (not shown); when the release button is pressed to the first stage, switch SW1 is turned on, and when the release button is pressed to the second stage, switch SW2 is turned on. . As will be described later, the in-camera microcomputer CCPU generates a start signal for photometry, automatic focus adjustment operation, and image blur correction operation when the switch SW1 is turned on, and performs exposure control and film winding using the turn-on of the switch SW2 as a trigger. The switch SW2 is connected to the "interrupt input terminal" of the microcomputer CCPU in the camera, and even if the program is being executed when the switch SW1 is on, an interrupt is generated by turning on the switch SW2, and the program can immediately proceed to a predetermined interrupt program.

MTR1 is a motor for film feeding, and MTR2 is a motor for mirror up/down and shutter spring charging.
Normal rotation and reverse rotation are controlled by respective drive circuits MDR1 and MDR2.

MG1 and MG2 are magnets for starting the movement of the front and rear shutter curtains, respectively, and the amplification transistors TR1 and T
Power is supplied through R2, and the shutter STR is controlled by the microcomputer CCPU within the camera.

Next, the configuration on the lens LNS side will be explained.

The LCPU is an in-lens microcomputer, and is a one-chip microcomputer having ROM, RAM, and A/D conversion functions, like the in-camera microcomputer CCPU. The in-lens microcomputer LCPU adjusts the focus adjustment lens FL according to commands sent from the camera body CNR via the signal line DCL.
Performs NS drive control and aperture drive control. In addition, various operating conditions of the lens (how much the focus adjustment optical system is driven, how many steps the aperture is stopped, etc.) and parameters (open F number, focal length, coefficient of defocus amount vs. extension amount, etc.) ) is transmitted to the camera side via the signal line DLC.

FMTR is a motor for driving the focusing lens FLNS, which rotates a helicoid ring (not shown) via a gear train to move the lens FLNS forward and backward in the optical axis direction to adjust the focus.

FDR is a drive circuit for the motor FMTR, and controls forward/reverse rotation, braking, etc. of the motor FMTR in accordance with signals from the microcomputer LCPU in the lens.

In this embodiment, an example of an inner focus type is shown, and when a focus adjustment command is sent from the camera body CMR, the above-mentioned motor is adjusted according to the drive amount and direction sent at the same time. Focus adjustment is performed by driving the FMTR to move the focusing lens FLNS in the optical axis direction. The amount of movement of the focusing lens FLNS is monitored by a pulse signal from an encoder circuit ENCF and counted by a counter in a microcomputer LCPU within the lens, and when a predetermined movement is completed, the motor FMTR is activated. Control.

Therefore, once the focus adjustment command is sent from the camera main body CMR, the microcomputer CCPU in the camera
There is no need to be involved in driving the lens at all until the driving of the lens is completed. Further, the configuration is such that the contents of the counter can be sent to the camera body CMR as necessary.

When an aperture control command is sent from the camera body CMR, a stepping motor DM, which is known for driving the aperture, is activated according to the number of aperture stages sent at the same time.
Drives TR.

The ICPU is a microcomputer for image blur correction, which controls the image blur correction operation and transmits information from the camera body CMR to the lens LNS.
The signal DCL from the lens LNS to the camera body CMR is input, and the output signal from the microcomputer ICPU is input to the in-lens microcomputer LCPU. In other words, communication with the in-camera microcomputer CCPU is performed only with the in-lens microcomputer LCPU, and the image blur correction microcomputer ICP
U is taking the form of intercepting communications between the two parties. and,
Communication from the image blur correction microcomputer ICPU to the in-camera microcomputer CCPU is performed via the in-lens microcomputer LCPU.

ACC is an angular accelerometer that detects lens shake, and the angular acceleration signal a is sent to an image shake correction control circuit I, which will be described later.
Output to CNT.

ICNT is an image blur correction control circuit (details will be described later), which includes an integrator, filter, amplifier, switch, etc., and drives and controls the image blur correction motor IMTR, which will be described later. It has an input/output line for signals with the shake correction microcomputer ICPU.

The ILNS is a correction optical system which is an optical axis decentering means, is supported by a link mechanism to be described later, and is movable substantially parallel to a plane perpendicular to the optical axis.

IMTR is an image blur correction motor that rotates a cam CAM fixed on the motor shaft forward and reverse, thereby displacing the correction optical system ILNS.

PSD is a position sensor that detects the position of the correction optical system ILNS, and the light from the infrared light emitting diode IRED passes through the slit SL that moves together with the correction optical system ILNS.
By passing through T and entering the light receiving surface of the position sensor PSD, the position sensor PSD generates the position of the incident light, that is, a position signal dL of the correction optical system ILNS. This output signal (dL) is input to the image blur correction microcomputer ICPU and the image blur correction control circuit ICNT.

SWIS is the main switch of the image blur correction system. When the switch SWIS is turned on, power is supplied to the image blur correction microcomputer ICPU and its peripheral circuits, and the image blur correction control circuit ICNT starts operating. When the switch SW1 of the camera body CMR is turned on, this signal is communicated to the image blur correction microcomputer ICPU via the lens microcomputer LCPU, and the motor IMTR is driven to start the image blur correction operation.

It was previously assumed that dL is the position signal of the correction optical system ILNS, but since the displacement of the correction optical system ILNS and the amount of optical axis eccentricity caused by this are proportional, dL is the amount of optical axis eccentricity. There is no problem in considering it as (displacement). The origin of this signal is the position where the central axis of the correction optical system ILNS and the photographing optical axis coincide.

FIG. 4 shows the image blur correction control circuit I shown in FIG.
This is a detailed representation of CNT, and the area surrounded by the dotted line corresponds to this. The contents will be explained below.

The HPF is a high-pass filter that cuts the DC component (bias component) of the angular acceleration signal a from the angular accelerometer ACC, and generates the angular acceleration signal a'.

INTEG is an integrator that integrates the above-mentioned angular acceleration signal a', and its output v' represents the angular velocity of blur occurring in the lens barrel.

AMP1 is a coefficient conversion amplifier that converts the shake angular velocity v' of the lens barrel into a drive speed command signal v for the correction optical system ILNS. The signal v is added to the addition points P3, P2,
It is input to switch SWMT, which will be described later, via P1.

SWMT is a switch that controls on/off control signal input to the motor IMTR, and is controlled by the shake correction microcomputer ICPU. When the switch is turned on, driving of the motor IMTR is started. Image stabilization begins.

COMPE is a phase compensation circuit for increasing the stability of the feedback loop system, and this output signal V
M is the voltage applied to the motor IMTR, which corresponds to the driving speed command signal of the motor IMTR.

AMP2 is a power buffer that supplies current to motor IMTR.

Through the above-mentioned path, the angular acceleration a of the lens barrel is converted into the applied voltage VM of the motor IMTR, and when the motor shaft rotates, the correction optical system I is activated by the cam described later.
The LNS is driven in a direction substantially perpendicular to the optical axis. At this time, the light from the infrared light emitting diode IRED passes through the slit and reaches the position sensor PSD, which outputs a position signal (displacement signal) dL of the correction optical system ILNS. Then, this displacement signal dL is transmitted to the shake correction microcomputer I.
CPU, differentiator DIFF and amplifier HBI described later
, AMP3, and AMP4.

DIFF is a differentiator, and correction optical system ILNS
The displacement signal dL is differentiated and a velocity signal vL is output. Then, the speed signal vL is inverted and inputted at the addition point P1, thereby forming a feedback loop in which the driving speed of the correction optical system ILNS is a controlled variable.

AMP3 and AMP4 are correction optical systems ILNS
This is an amplifier for generating a restoring force to the origin. When the camera or lens is panned, the image stabilization device responds to prevent this panning, and the correction optics ILNS uses up its drivable stroke. At this time, the image blur correction operation cannot be restarted unless the correction optical system ILNS is returned to its origin. Therefore, the correction optical system I
By multiplying the displacement signal dL of the LNS by k1 or k2 and inputting it invertedly to the addition point P2, a restoring force to the origin proportional to the displacement signal dL is provided. and,
Switches SWSL1 and SWSL2 are switches for selecting the strength of restoring force, and are controlled by the image blur correction microcomputer ICPU. If k2>k1, a weak restoring force is given when SWSL1 is turned on (closed), and a strong restoring force is given when SWSL2 is turned on.

The signal VG input from the image blur correction microcomputer ICPU to the addition point P3 is connected to the feedback loop mentioned above.
The drive speed command signal v of the correction optical system ILNS input to the
It is used for the purpose of, for example, canceling the bias component of the signal v. This signal VG is calculated by a predetermined flow within the image blur correction microcomputer ICPU and is output.

RES1 and RES2 are output lines for resetting the high-pass filter HPF and the integrator INTEG and initializing their output signals.

By the way, in FIG. 3, the image blur correction mechanism section is
Although only the axes are shown, since camera shake occurs in two-dimensional directions (up, down, left, and right), the actual lens must detect shake in two axial directions, and the correction optical system ILNS must also be moved two-dimensionally.

FIG. 5 shows in detail the support mechanism that allows the correction optical system ILNS to move two-dimensionally, and is a perspective view viewed diagonally from the front on a horizontal plane including the optical axis. Note that blurring is usually measured in the vertical (pitch) and horizontal (yaw) directions.
), and in this embodiment, the reference axes for blur correction are set in the I and J directions, which are tilted by 45 degrees from the above two directions.

In FIG. 5, arrow G is the direction of gravity;
1i and 1j are angular accelerometers that detect angular shake in the I direction and J direction of the photographing optical axis C, and correspond to the angular accelerometer ACC in FIG. The vibration in the J direction, that is, the angular acceleration aj, is detected by the angular accelerometer 1.
Detected at j. Reference numeral 31 indicates a fixed frame fixed to the photographic lens body, and 37 indicates a movable frame, which is connected to the fixed frame 31 by plates 35, 36 and flexible tongues 37 to 40, and is movable in the direction of arrow di. . A lens holding frame 32 holds a correction optical system 33 (corresponding to the correction optical system ILNS in FIG. 3), and holds plates 41, 42 and flexible tongues 43 to 4.
6 to the moving frame 37, and is movable relative to the moving frame 37 in the direction of the arrow dj.

Reference numeral 51 denotes a di-direction driving motor, which corresponds to the image blur correction motor IMTR in FIG. Motor 5
A cam 52 (this is the cam CA in FIG. 3) is attached to the output shaft 51a of
M) and pulley 53 are fixed, and the cam 52
The cam surface 52a contacts the cam follower 54 attached to the fixed frame 37, and the rotation of the motor shaft 51a and the cam 52 causes the fixed frame 37 to move in the di direction. In addition, pool
One end of a spring 56 is connected to the tip of the wire 55 wound around the wire 53, and the other end is attached to the spring hook 5 implanted in the fixed frame 37.
7, the cam 52 and cam follower 54
A contact force acts between them. The reason why the pulley 53 and wire 55 are used to generate this contact force is to prevent torque from being generated in the cam 52 due to the contact force. 1-1
No. 71908), so it will be omitted here.

58 is a slit plate fixed to the moving frame 37, which corresponds to the slit SLT in FIG.
The di direction of the movable frame 37 is determined by a known method using the code 59 (corresponding to the infrared light emitting diode IRED in FIG. 3), the position sensor 60 (corresponding to the position sensor PSD in FIG. 3), and the slit 58a of the slit plate 58. Detect the position of.

A motor 61 drives the lens holding frame 32 in the dj direction, and is fixed to the flat part 31j of the fixed frame 31 via a motor stand 48. A cam 62 and a pulley 63 are similarly fixed to the motor shaft 61a, and the cam 62 and cam follower 64 are connected by a wire 65, a spring 66, and a spring catch 67.
are in contact with each other. Here, the cam follower 64 is provided not on the lens holding frame 32 but on the intermediate lever 71. The intermediate lever 71 is connected to the fixed frame 31 via a flexible tongue 72, and is swingable in the direction of arrow θj.
is attached, and the bearing is in contact with the flat portion 32j of the lens holding frame 32. Therefore, the rotation of the cam 62 causes the cam follower 64, intermediate lever 71, and intermediate bearings 73, 74 to move together in the θj direction, which causes the lens holding frame 32 to move in the dj direction. The displacement of the moving frame 37 in the di direction is determined by the displacement of the lens holding frame 32.
Since the movement is absorbed between the flat part 32j and the intermediate bearings 73 and 74, interference between the movements in the di direction and the dj direction is avoided. Further, a slit plate 68 is fixed to the lens holding frame 32, and the displacement of the lens holding frame 32 in the dj direction is detected by an infrared light emitting diode 69 and a position sensor 70.

Reference numeral 81 denotes a lock plate forming part of a locking mechanism for holding the correction optical system 33 at the origin when no image stabilization is performed, and is fixed to the lens holding frame 32 and has a lock hole 81a. . 82 is a lock pin, fixed frame 3
It is movable in the direction of the photographing optical axis C in a lock pin pedestal (indicated by 84 in FIG. 1, which will be described later), which is not shown in FIG.

83 is a lock pin fork, which has a notch 83a when the lock pin 82 is inserted into the lock hole 81a.
is the groove 82b provided in the small diameter portion 82a of the lock pin 82.
By sliding a lock knob (not shown in FIG. 5) (indicated by 85 in FIG. 1, which will be described later) fixed on the upper surface of the lock pin fork 83 in the direction of the optical axis C, The lock pin is moved forward and backward in the direction of optical axis C. And lock knob, lock pin fork 83, lock pin 82
When the lock pin 82 is moved to the left in the figure, the large diameter portion 8 of the lock pin 82
2d fits into the lock hole 81a of the lock plate 81,
The correction optical system 33 is locked at the original position. and,
At this time, the main switch SWIS is off.

On the other hand, when the lock knob, lock pin fork 83, and lock pin 82 are moved to the right in the figure, the large diameter portion 82d of the lock pin 82 and the lock hole 81a
The fitting is released, the lock plate 81 is unlocked, and the correction optical system 33 can be moved in the shift direction. Further, the right end portion 82e of the lock pin 82 turns on the main switch SWIS, the image shake correction control circuit ICNT starts operating, and the image shake correction becomes possible, and the image shake correction start switch (switch SWMT in FIG. 3) is turned on. When turned on, the correction optical system ILNS is driven and image blur correction is started.

With the above configuration, the blurring of the lens in the I direction is detected by the angular accelerometer 1i, and the motor is detected based on this blurring signal.
By driving the motor 51, the fixed frame 37 and the lens holding frame 32 are driven in the di direction, and the vibration in the J direction is detected by the angular accelerometer 1j, and the motor 61 is driven.
The lens holding frame 32 is driven in the dj direction via the intermediate lever 71. By performing blur correction operations in these two axial directions, it is possible to correct two-dimensional blur on the photographic screen.

Next, details of the locking mechanism will be explained with reference to FIGS. 1 and 2.

FIGS. 1 and 2 are cross-sectional views of the locking mechanism, with FIG. 1 showing the locked state and FIG. 2 showing the unlocked state, that is, the state in which image blur correction is possible.

In FIG. 1, the lock pin 82 is attached to the fixed frame 3.
is inserted into a lock pin pedestal 84 installed on 1,
It is movable in the left and right direction (optical axis C direction). Then, the groove 82b of the lock pin 82 and the lock pin fork 8
No. 3 notches 83a are engaged. The lock pin fore
The fork 83 is connected to a lock knob 85 by a screw 87, and a click spring 86 is held between the lock pin fork 83 and the lock knob 85.

Reference numeral 88 denotes a knob pedestal, 89 a cover member constituting the outermost periphery of the lens barrel, and both members are connected by screws 90. The V grooves 88a and 88b are click grooves, and a click is obtained at a position where the tip end 86a of the click spring 86 engages with the grooves. 88c is a through hole through which the knob 85 moves. The contact pieces 91 and 92 constitute the main switch SWIS described above.

In FIG. 1, the lock knob 85 is located at the left end in the figure, so the large diameter portion 82d of the lock pin 82 fits into the lock hole 81a of the lock plate 81, locking the correction optical system 33 at the origin. are doing. At this time, the contact pieces 91, 92
(main switch SWIS) is off.

From this state, when the lock knob 85 is slid to the right in the figure, the lock pin 82 and lock hole 81
The fitting of a is released, and the correction optical system 33 becomes movable in a direction perpendicular to the optical axis. However, if the motor IMTR is not energized, the correction optical system 33 falls down due to its own weight. As shown in FIG. 2, the upper end of the lock hole 81a and the lock pin 8
It stops at the position where the small diameter portion 82a of No. 2 comes into contact. Further, as the lock pin 82 moves rightward in the figure, the right end inclined portion 82e pushes up the contact piece 91 to bring it into electrical contact with the contact piece 92, turning on the main switch SWIS.

To return to the locked state from the unlocked state shown in FIG. 2, it is sufficient to slide the lock knob 85 to the left in the figure.
guides the lock hole 81a to return the correction optical system 33 to its origin.

To explain the advantages of the above locking mechanism, for example, the following points can be mentioned.

a) When locked, the large diameter portion 82d of the lock pin 82 holds the lock hole 81a, resulting in excellent impact resistance.

b) Lock engaging portion, that is, lock hole 81
Since point a is close to the plane that passes through the center of gravity PG of the correction optical system 33 and is perpendicular to the optical axis C, the correction optical system support member (
The load applied to the plate 41, flexible tongues 43, 44, etc.) can be reduced.

c) Since the lock member is located within the image blur correction mechanism, the positioning accuracy of the correction optical system 33 when locked, that is, the degree of coincidence between the photographing optical axis C and the optical axis C' of the correction optical system is good.

d) The switch operation section is a lock knob 85.
, a knob pedestal 88, a click spring 86, and a lock pin fork 83 are integrated into the unit.After assembling the entire lens barrel, the switch operation unit is finally inserted from above the cover member 89. It can be assembled and has excellent assembly workability.

e) Relative positional deviation between the lock mechanism and the switch operation unit in the vertical direction is absorbed by the notch 83a of the lock pin fork 83, and deviation in the left and right direction is absorbed by the small diameter portion 82a and the large diameter portion of the lock pin 82. Since it is absorbed by the flat portion of 82d, even if a relative positional deviation occurs between the two, it does not affect the locking position accuracy.

FIG. 6 shows a second embodiment of the present invention, which differs from the first embodiment in the arrangement of a member having a lock pin and a lock hole.

The lens holding frame 32 of the correction optical system 33 includes:
A retaining plate 101 is fixedly installed, and a lock pin 102 is implanted on the retaining plate 101. The lock pin 102 has a large diameter portion 10
2a and an inclined portion 102b. 103 is rock play
It has a lock hole 103a that engages with the large diameter portion 102a of the lock pin 102, and is fixed to the lock knob 85 with a screw 87.

In this figure, the lock plate 103 indicated by a solid line indicates a locked state, and the lock plate 103' indicated by a broken line indicates an unlocked state.

In the unlocked state, the correction optical system 33 falls downward due to its own weight, but its movement range is limited by a stroke regulating means (not shown), and the tip of the conical inclined portion 102b of the lock pin 102 is It is regulated to be located inside the lock hole 103a'.

The click spring 86 serves as one contact piece of the main switch SWIS in this embodiment, and the other contact piece 104 is insert-molded in the V-groove 88b of the knob pedestal 88. ing.

In this second embodiment, the weight of the correction optical system 33 is applied to the lock knob 85, so it is suitable for a case where the weight of the correction optical system 33 is relatively small. Moreover, it has the advantage of having fewer components than the first embodiment.

[0082] According to each of the above embodiments, a member having an engaging hole (lock plate 81, 103) and a member having an inclined portion and a flat portion (lock pin 82, 102) are provided.
One side can move forward and backward with respect to the other, and when the engagement hole and the inclined part engage, the movable part for blur correction returns to its original position, and when the engagement hole and the flat part engage, the movable part returns to its original position. (Correction optical system 3
By locking 3), it is possible to achieve reliable locking with good positioning accuracy and excellent impact resistance.

[0083]

[Effects of the Invention] As explained above, according to the present invention,
a first locking member having an engaging hole and integrally coupled to the optical axis eccentric means or a fixed part of the device; and a first locking member having an inclined part and a flat part, a second lock member that is movably provided on the eccentric means and locks the optical axis eccentric means in a predetermined position by engaging the flat portion of the first lock member through the engagement hole and the inclined portion; This constitutes a locking means. Therefore, it is possible to provide an image blur correction device having a locking means that has good positioning accuracy of the optical axis decentering means to the movable center and has excellent impact resistance.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the configuration of main parts in a locked state in a first embodiment of the present invention.

FIG. 2 is a sectional view showing the configuration of main parts in the unlocked state in the first embodiment of the present invention.

FIG. 3 is a block diagram showing the image blur correction control circuit and its peripheral circuits shown in FIG. 3;

FIG. 4 is a schematic configuration diagram showing a single-lens reflex camera equipped with a device according to a first embodiment of the present invention.

5 is a perspective view showing a support mechanism for the optical axis decentering means shown in FIG. 3. FIG.

FIG. 6 is a cross-sectional view showing the main structure of a locking means in a second embodiment of the present invention.

[Explanation of code] ILNS, 33 Correction optical system IMTR
, 15, 61 Motor 32 Lens holding frame 82, 10
2 Lock pin 81, 103 Lock plate

Claims (1)

[Claims] 1. An image blurring device comprising an optical axis eccentricity means for optically correcting image blurring caused by vibrations applied to an imaging optical system, and a locking means for locking the optical axis eccentricity means at a predetermined position. In the correction device, the locking means has a first locking member having an engagement hole and integrally coupled to the optical axis decentering means or a fixing portion of the device, and a sloped portion and a flat portion. , which is movably provided on the fixed part or the optical axis eccentric means of the device, and when the flat part engages with the engagement hole of the first locking member through the inclined part, the optical axis eccentric means is moved. An image blur correction device comprising a second locking member that locks in a predetermined position.