JPH08211436A - Shake correction means locking device - Google Patents

Abstract

PURPOSE: To make a device compact and to stably lock a shake correction means by a locking means in any state such as the interruption of power without necessitating a means for power source backup. CONSTITUTION: As for this device, locking driving means 12 to 14 having no self holding force are used; a locking driving means is constituted of a coil 12 and a permanent magnet 13; structure for direct driving (integrating the locking means 11 with a magnetic field generating means 12) is attained; the locking driving means can be driven both in a locking direction and a locking releasing direction; the locking means is provided with an irreversible part the locking of which is not released by the driving (rocking) of the shake correction means 71, 72, 72a and 16; releasing and holding the locking of the holding means is stopped by the interruption of driving power to the locking driving means; releasing and holding the locking of the shake correction means is performed by an electromagnet; or releasing and holding the locking of the shake correction means is performed by the coil and the permanent magnet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shake correction means locking device having locking means for locking shake correction means for correcting image shake caused by low-frequency vibration generated in optical equipment such as cameras. Related to the improvement of.

[0002]

2. Description of the Related Art In the current camera, all the important operations for photographing such as exposure determination and focusing are automated, so that even a person unskilled in the operation of the camera has a very low possibility of photographing failure.

Recently, a system for preventing camera shake applied to a camera has also been studied, and factors causing a photographing error of a photographer have almost disappeared.

Here, a system for preventing camera shake will be briefly described.

The camera shake at the time of photographing is usually a vibration of 1 Hz to 12 Hz as a frequency. However, at the time of shutter release, it is possible to take a photograph without image shake even if such a camera shake occurs. As a basic idea, it is necessary to detect the vibration of the camera due to the hand shake and displace the correction lens according to the detected value. Therefore, in order to achieve the ability to take a picture without causing image shake even if camera shake occurs, first, it is necessary to accurately detect the camera vibration and secondly correct the optical axis change due to camera shake. Will be needed.

In principle, this vibration (camera shake) is detected by a vibration sensor for detecting angular acceleration, angular velocity, angular displacement, etc., and an output signal of the sensor is integrated electrically or mechanically to determine the angle. This can be done by mounting a camera shake detection unit that outputs displacement on the camera. Then, based on this detection information, the correction optical mechanism that decenters the photographing optical axis is driven to suppress the image blur.

An outline of a vibration isolation system using the vibration detecting means will be described with reference to FIG.

The example shown in FIG. 15 is a diagram of a system for suppressing image shake due to camera vertical shake 81p and camera horizontal shake 81y in the direction of arrow 81 in the figure.

In the figure, 82 is a lens barrel, 83p, 83
y is a vibration detecting means for detecting the camera vertical shake angular displacement and the camera horizontal shake vibration, respectively.
p, 84y. 85 is a correction means (86p, 8
6y is a coil for applying thrust to the correction means 85, and 87
p and 87y are position detection elements that detect the position of the correction means 85, and the correction means 85 is provided with a position control loop described later, and is driven with the outputs of the vibration detection means 83p and 83y as target values, and Ensure stability at face 88.

Next, FIG. 16 is an exploded perspective view showing the structure of a correction means suitably used for such purpose.

A bearing 73y is press-fitted into a support frame 72 in which the lens 71 is crimped. A support shaft 74y is supported by the bearing 73y so as to be slidable in the axial direction. The recess 74ya of the support shaft 74y is fitted into the claw 75a of the support arm 75. The bearing 7 is also attached to the support arm 75.
3p is press-fitted, and the support shaft 74p is supported slidably in the axial direction.

Incidentally, FIG. 16 also shows a rear view of the support arm 75 and a partial front view for clearly showing the claws 75a.

Projector mounting holes 72pa, 72 of the support frame 72
Light projecting elements 76p and 76y such as IRED are bonded to ya, and the terminals are soldered to lids 77p and 77y (bonded to the support frame 72) that also serve as connection boards. Further, the support frame 72 is provided with slits 72pb and 72yb, and a light projecting element (IRED: infrared light emitting diode) 76 is provided.
The projections of p and 76y pass through slits 72pb and 72yb and enter PSDs 78p and 78y described later. Coils 79p and 79y are also bonded to the support frame 72, and terminals are soldered to the lids 77p and 77y.

Supporting balls 711 are fitted into the lens barrel 710 (at three positions), and a claw portion 710a into which the recess 74pa of the support shaft 74p is fitted is provided.

Yokes 712p ₁ , 712p ₂ , 712p
₃ , the magnet 713p is laminated and adhered, and similarly, the yokes 712y ₁ , 712y ₂ , 712y ₃ and the magnet 7 are attached.
13y is also laminated and adhered. In addition, the polarity of the magnet is the arrangement of arrows 713pa and 713ya.

The yokes 712p ₂ and 712y ₂ are lens barrels 71.
It is screwed into the 0 recessed portions 710pb and 710yb.

Position detecting elements 78p and 78y such as PSD are adhered to the sensor seats 714p and 714y (714y is not shown), the sensor masks 715p and 715y are covered, and the flexible substrate 716 is covered with the position detecting elements (PSD: semiconductor position detector). ) 78p and 78y terminals are soldered. Convex portions 714pa and 714ya of the sensor seats 714p and 714y
(714ya is not shown) is a mounting hole 710p of the lens barrel 710.
c, 710yc, and the flexible board stay 71
At 7, the flexible substrate 716 is screwed to the lens barrel 710. Ears 716pa, 7 of the flexible substrate 716
16ya are holes 710pd and 710yd of the lens barrel 710, respectively.
Through the yokes 712p ₁ and 712y ₁ , and the coil terminals and the light projecting element terminals on the lids 77p and 77y are respectively ear portions 716pa and 716 of the flexible substrate 716.
The land portions 716pb and 716yb of ya are connected to the polyurethane copper wire (three twisted wires).

A plunger 719 is screwed to the mechanical lock chassis 718, the plunger 719 is fitted to a mechanical lock arm 721 charged with a spring 720, and is rotatably screwed to the mechanical lock chassis 718 by a shaft screw 722.

The mechanical lock chassis 718 is screwed to the lens barrel 710, and the terminal of the plunger 719 is soldered to the land portion 716b of the flexible substrate 716.

The spherical adjusting screw 723 (three places) is threadedly penetrated into the yoke 712p ₁ and the mechanical lock chassis 718, and the adjusting screw 723 and the supporting ball 711 support the supporting frame 72.
The sliding surface (hatched portion 72c) is sandwiched. Adjustment screw 72
3 is screwed and adjusted so as to face the sliding surface with a slight clearance.

The cover 724 is adhered to the lens barrel 710 and covers the above-mentioned correction means.

FIG. 17 is a diagram for explaining the drive control system of the correction means shown in FIG.

The outputs of the position detecting elements 78p and 78y are amplified by the amplifier circuits 727p and 727y to be coils 79p and 79y.
When input to y, the support frame 72 is driven and the outputs of the position detection elements 78p and 78y change. Coil here 79
The drive direction (polarity) of p and 79y is the position detection element 78p,
When the output of 78y is set to be small (negative feedback), the driving force of the coils 79p and 79y causes the support frame 7 to be at a position where the outputs of the position detection elements 78p and 78y become substantially zero.
2 is stable. The adder circuits 731p and 731y are circuits that add the output from the position detection elements 78p and 78y and the command signals 730p and 730y from the outside, and the compensating circuits 728p and 728y are circuits that further stabilize the control system. Circuits 729p and 729y are coils 79p and 79
It is a circuit that supplements the current applied to y.

A command signal 7 is externally supplied to the system shown in FIG.
When 30p and 730y are given via the adder circuits 731p and 731y, the support frame 72 causes the command signals 730p and 730y.
Driven extremely faithfully.

The method of controlling the coil by negatively feeding back the position detection output as in the control system of FIG. 17 is called a position control method.
When the shake amount is given as the command signals 730p and 730y, the support frame 72 is driven in proportion to the shake amount.

FIG. 18 is a circuit diagram showing details of the drive control system of the correction means shown in FIG. 17, and here only the pitch direction 725p will be described (yaw direction 726y.
Is also the same).

Current-voltage conversion amplifiers 732pa and 732
pb is the photocurrents 78i ₁ and 78i generated in the position detecting element 78p (composed of resistors R1 and R2) by the light projecting element 76p.
i ₂ is converted into a voltage, and the differential amplifier 733p detects the difference between the current-voltage conversion amplifiers 732pa and 732pb (the support frame 72).
Output proportional to the position in the pitch direction of 725p). As described above, the current-voltage conversion amplifier 732pa,
732pb, differential amplifier 733pc, and resistors R3 to R1
0 constitutes the amplifier 727p in FIG.

The command amplifier 734pa adds the command signal 730p input from the outside to the difference signal of the differential amplifier 733p, and the resistors R11 to R14 form the adder circuit 731p of FIG.

Resistors 738p and 739p and capacitor 7
40p is a known phase lead circuit, which corresponds to the compensating circuit 728p in FIG.

The output of the adder circuit 731p is the compensation circuit 7
It is input to the drive amplifier 735p via 28p, the drive signal of the pitch coil 79p is generated here, and the correction means is displaced. The drive amplifier 735p, the resistor 737p, and the transistors 736pa and 736pb form a drive circuit 729p in FIG.

The adding amplifier 741p is the sum of the outputs of the current-voltage converting amplifiers 732pa and 732pb (the position detecting element 7).
Then, the drive amplifier 742p receiving this signal drives the light projecting element 76p accordingly. As described above, the adding amplifier 741p, the driving amplifier 742p,
A drive circuit for the light projecting element 76p is configured by the resistors R18 to R24 and the capacitor C1 (not shown in FIG. 17).

The light projecting element 76p is extremely unstable in temperature and the like, and its projecting amount changes, and accordingly the differential amplifier 73p.
Although the position sensitivity of 3p changes, if the light projecting element 76p is controlled by the drive circuit so that the total amount of received light is constant as described above, the change in position sensitivity is reduced.

Here, the support frame 7 shown in FIG. 16 and FIG.
A locking device for locking 2 will be described.

The mechanical lock chassis 7 described with reference to FIG.
18, spring 720, mechanical lock arm 721, shaft screw 7
22 (which constitutes the locking means), the plunger 719
A locking device is configured by (constituting locking driving means), and a view of the locking device viewed in the direction of arrow 718a in FIG. 16 is shown in FIG. 19A, and a cross-sectional view of the plunger 719. Is shown in FIG.

In FIG. 19B, the plunger 719
Is a slider 719a, a stator 719b, a coil 719c provided on the stator 719b, and a permanent magnet 71.
It is composed of 9d. Then, as shown in FIG. 19A, the slider 719a is hooked in a hole 721b of a mechanical lock arm 721 rotatably supported by a shaft 722, and the mechanical lock arm 721 is rotated by a spring 720 in the direction of arrow 720a. It is energized. Therefore, the force F with which the slider 719a is pulled out from the stator 719b is
Always receive out. However, since the slider 719a is in contact with the permanent magnet 719d, its attractive force is large and is not moved by the force of the spring 720 (Fmg> Fou).
t: Fmg is the attractive force of the permanent magnet). In this state, the projection 721a at the tip of the mechanical lock arm 721 is fitted in the hole 72d of the support frame 72, and the support frame 72 is locked.

Next, when a current is applied to the coil 719c in a desired direction, the flow of magnetic flux in the magnetic circuit formed by the permanent magnet 719d, the slider 719a and the stator 719b changes, and the slider 719a and the permanent magnet 719d are attracted. The power weakens. Then, the mechanical lock arm 7 is driven by the force of the spring 720.
21 rotates in the direction of arrow 720a, the protrusion 721a is separated from the hole 72d of the support frame 72, and the locking is released (Fout.
> Fmg-Fi Fi is current repulsive force). At this time, the slider 719a is also pulled out of the stator 719b at the same time, and a gap δ is generated between the slider 719a and the permanent magnet 719d.

As is well known, since the attraction force is inversely proportional to the square of the distance between the permanent magnet 719d and the opposing object, the attraction force becomes extremely small due to the gap δ. Therefore, the coil 71
Even if the power supply to 9c is cut off, the support frame 72 is pressed by the urging force of the spring 720.
The unlocked state of can be maintained.

Next, when a current is applied to the coil 719c in the opposite direction, the resultant force of the absorption force of the slider 719a and the attraction force of the permanent magnet 719d by this current becomes larger than the force of the spring 720, and the slider 719a moves into the stator 719b. Pulled in (Fmg + Fi> Fout) Once the slider 719a begins to be pulled into the stator 719b, the absorption force of the permanent magnet 719d increases at an accelerated rate due to the decrease in the gap δ, and the slider 719a abuts the permanent magnet 719d. Along with the protrusion 7
21a enters the hole 72d of the support frame 72, and again the support frame 72
Will be locked.

As described above, a current is passed through the plunger 719 only at the time of locking and unlocking, so that the bistable structure holds each state, and a compact and power-saving locking device is realized. ing.

FIG. 20 is a block diagram showing the outline of the image stabilization system.

In FIG. 20, reference numeral 91 denotes the vibration detecting means 83p and 83y shown in FIG. 15, which is a shake detection sensor for detecting an angular velocity of a vibration gyro or the like and a DC output of the shake detection sensor.
It is composed of sensor output calculation means for obtaining the angular displacement by integrating after cutting the component.

The angular displacement signal from the vibration detecting means 91 is input to the target value setting means 92. This target value setting means 9
2 is a variable differential amplifier 92a and a sample hold circuit 9
2b, and a sample hold circuit 92b
Is always being sampled, the two signals inputted to the variable differential amplifier 92a are always equal and the output thereof is zero. However, when the sample-hold circuit 92b is brought into the hold state by the output from the delay means 93 which will be described later, the variable differential amplifier 92a sets the time to zero and starts outputting continuously.

The amplification factor of the variable differential amplifier 92a is variable by the output of the image stabilization sensitivity setting means 94. The reason is that the target value signal of the target value setting means 92 is a target value (command signal) that causes the correction means to follow, but the correction amount (anti-vibration sensitivity) of the image plane with respect to the drive amount of the correction means is
This is because it changes depending on the optical characteristics based on the change in focus such as focus, and thus compensates for the change in the image stabilization sensitivity. Therefore, the image stabilization sensitivity setting unit 94 receives the zoom focal length information from the zoom information output unit 95 and the focus focal length information based on the distance measurement information of the exposure preparation unit 96, and sets the image stabilization sensitivity based on the information. The target value setting means 9 extracts the image stabilization sensitivity information preset based on the calculation or the information.
The gain of the variable differential amplifier 92a of No. 2 is changed.

The correction drive means 97 is the drive control circuit shown in FIG. 18, and the target values from the target value setting means 92 are input as command signals 730p and 730y.

The correction starting means 98 is the driving circuit 7 of FIG.
29p, 729y and the coils 79p, 79y are connected to each other.
By connecting it to 8c, both ends of each of the coils 79p and 79y are short-circuited, and when the signal of the logical product means 99 is input, the switch 98a is connected to the terminal 98b and the correction means 910 is in the control state (still Although shake correction is not performed, power is supplied to the coils 79p and 79y, and the position detection elements 78p and
The correction means 910 is stabilized at the position where the 78y signal becomes substantially zero). At the same time, the output signal of the logical product means 99 is also input to the locking means 914, whereby the locking means unlocks the correction means 910.

The correcting means 910 is the position detecting element 7
Input the position signals of 8p and 78y to the correction driving means 97,
Position control is performed as described above.

The logical product means 99, when both the release half-press SW1 signal of the release means 911 and the output signal of the image stabilization switching means 912 are input, the AND gate 99a, which is a component thereof, outputs the signal.

That is, when the photographer operates the anti-vibration switch of the anti-vibration switching means 912 and the release means 911 presses the release half-way, the correction means 910 is unlocked and enters the control state.

The SW1 signal of the release means 911 is input to the exposure preparation means 96 to perform photometry, distance measurement, and lens focusing drive, and as described above, output focus focal length information to the image stabilization sensitivity setting means 94. .

The delay means 93 receives the output signal of the logical product means 99, outputs it after one second, for example, and causes the target value setting means 92 to output the target value signal as described above.

Although not shown, the vibration detecting means 91 also starts to operate in synchronization with the SW1 signal of the release means 911. As described above, the sensor output calculation including a large time constant circuit such as an integrator requires a certain amount of time from the start to the stable output.

The delay means 93 plays a role of outputting a target value signal to the correction means 910 after waiting until the output of the vibration detection means 91 stabilizes, and prevents vibration after the output of the vibration detection means 91 stabilizes. It is configured to start.

The exposure means 913 performs the mirror-up by the release push-off SW2 signal input of the release means 911, opens and closes the shutter at the shutter speed obtained based on the photometric value of the exposure preparation means 96 to perform the exposure, and the mirror-down. Then, the shooting ends.

After the photographing, the photographer releases the shutter 911.
When the hand is released and the SW1 signal is turned off, the logical product means 99 stops the output, the sample hold circuit 92b of the target value setting means 92 enters the sampling state, and the output of the variable differential amplifier 92a becomes zero. Therefore, the correction means 91
0 returns to the control state in which the correction drive is stopped.

Since the output of the logical product means 99 is turned off, the locking device 914 locks the correction means 910, and then the switch 98a of the correction starting means 98 is connected to the terminal 98c, and the correction means 910 becomes Get out of control.

The vibration detecting means 91 continues to operate for a fixed time (for example, 5 seconds) after the operation of the release means 911 is stopped by a timer (not shown), and then stops.
This is because it is complicated for the photographer to continuously perform the release operation after stopping the release operation. Therefore, it is possible to prevent the vibration detection means 91 from being activated each time at such a time, and to shorten the waiting time until the output is stabilized. Vibration detection means 9
When 1 is already activated, the vibration detecting means 91 sends an activated signal to the delay means 93 to shorten the delay time.

[0057]

In the image stabilization system described above, the correction means (hereinafter referred to as shake correction means).
The locking device for locking (the mechanical lock chassis 718, the plunger 719, the spring 720, the mechanical lock arm 721, and the shaft screw 722 in FIG. 16) has the following problems.

First, when the power is cut off during image stabilization, that is, when the battery of an optical device such as a camera having the above-described image stabilization system is removed during image stabilization or is exhausted, shake correction means is provided. It is that the lock of can not be done. This is because the conventional locking device has the characteristic of holding the current state (self-holding force), and therefore requires electric power to shift from the unlocked state to the locked state. This is because if the power is cut off in the unlocked state (during vibration isolation), the locked state cannot be achieved.

In order to solve this, for example, Japanese Patent Publication No. 3-2
It is also proposed to have a power supply backup capacitor as in No. 4116, and to perform locking drive by this capacitor when the power supply is cut off, but in this case, when the capacitor is not charged, no countermeasure is taken and the power supply Since the backup capacitor is quite large, it is not suitable as a consumer device.

Further, as disclosed in, for example, Japanese Patent Laid-Open No. 62-18874, an example of using a motor instead of a plunger for driving the locking device has been proposed, but when a motor is used, a transmission gear is always required. The friction between the gears and the cogging of the motor itself have a self-holding force for the locking means drive part, so it is necessary to energize the motor for locking. Cannot be done.

Therefore, since the shake correcting means is in the unlocked state after the power is cut off in this way, the shake correcting means swings when carrying this optical device, and not only abnormal noise is generated, but also Damage to various parts may also occur.

Second, when driving the conventional locking device,
Especially when the locking drive is performed, the slider 7 of the plunger 719 is
The bottom of 19a collides with the permanent magnet 719d (see FIG. 19) to generate a loud noise, which is uncomfortable.

As described above, the driving unit having the self-holding force often decelerates rapidly when it reaches the stable point, which causes a sound, and the self-holding force controls the locking speed. It is difficult to do so, and it is difficult to suppress the generation of sound by electric control.

Thirdly, when the shake correcting means is unlocked by some disturbance or vibration in the locked state (FIG. 16).
(When the projection 721a of the above is out of the hole 72d of the shake correcting means).

At this time, there is a problem that the shake correcting means cannot be locked because the optical device having the image stabilizing system is not in use when it is not used.

(Object of the Invention) A first object of the present invention is to make the apparatus compact, to require no means for power backup, and to stably swing in any state such as when power is cut off. An object of the present invention is to provide a shake correction means locking device capable of locking the correction means by the locking means.

A second object of the present invention is to provide a shake compensating device locking device which is capable of downsizing the locking device and lowering the driving noise when the vibration correcting device is locked and unlocked. That is.

A third object of the present invention is to provide a shake correction means locking device capable of achieving power saving when driving the locking means.

A fourth object of the present invention is to provide a shake correction means locking device capable of achieving cost reduction of the device.

A fifth object of the present invention is to provide a shake correction means locking device which can achieve power saving when holding the shake correction means in the unlocked state.

A sixth object of the present invention is to provide a shake correcting means locking device which can surely hold the unlocked state of the shake correcting means when more stability is required. .

[0072]

In order to achieve the above-mentioned first object, claims 1 to 3, 11, 11, 22, 22 and 25 are provided.
In the present invention described in 7, the locking drive means having no self-holding force is used, the locking drive means is composed of a coil and a permanent magnet, and the direct drive structure (the locking means and the magnetic field generating means are integrated. The lock driving means can be driven in both the locking direction and the unlocking direction, and the locking means has an irreversible portion that cannot be unlocked by driving (swinging) the shake correction means. Alternatively, the lock release holding of the holding means is stopped by stopping the driving power to the lock driving means, the lock release holding of the shake correction means is performed by an electromagnet, or the lock release holding of the shake correction means is performed by a coil. And I try to do it with a permanent magnet.

In order to achieve the above second object,
According to the present invention as set forth in claims 14 to 16, 17 to 20, and 34 to 36, when the shake correction means is locked, the locking drive means applies a force to the locking means in a direction that weakens the biasing force in the locking direction. The speed at the end of driving at the time of locking or unlocking the locking means by changing the speed at the time of driving the locking means or short-circuiting the locking driving means to add viscous resistance. Drop it
To reduce the driving force at the end of driving when locking or unlocking the locking means, to increase the braking force at the end of driving when locking or unlocking the locking means, or The shake correction means is driven (swinged) to restrict the operation of the locking means.

Further, in order to achieve the third object,
Claims 4, 6, 8-10, 12, 12, 21, 23, 2
In the present invention described in Nos. 4, 30 to 33, the magnetic field of the shake correction means is used as the locking drive means, and the driving force to the coil is increased only when the static friction is overcome. (Pulse modulation drive) Drive by PWM, or reduce the drive power of the coil in the direction where the drive force is small,
The driving force of the shake correction means is used to drive the locking means,
A holding means dedicated for holding the shake correcting means in the unlocked state is provided, or the biasing force of the elastic means is prevented from increasing with the locking drive.

In order to achieve the above-mentioned fourth object,
According to the present invention as set forth in claims 5 and 7, the locking drive is performed by the magnetic field of the shake correcting means, or the shake correcting means has the same shape or a magnet obtained by dividing a permanent magnet thereof is used as the locking driving means. There is.

Further, in order to achieve the fifth object,
According to the sixteenth and thirty-third aspects of the present invention, the locking and holding of the shake correcting means is performed by an electromagnet, and the biasing force at the time of holding and releasing the locking is weakened.

In order to achieve the sixth object,
According to the present invention as set forth in claims 28 and 29, the holding force of the holding means is increased when the locking drive means and the holding means are driven at the same time, or when the optical equipment in which the apparatus is mounted is used.

[0078]

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

FIG. 1 is an exploded perspective view showing a shake correcting means locking device according to a first embodiment of the present invention, and parts having the same functions as those in FIG. 16 are designated by the same reference numerals.

The support frame 72 includes support balls (balls) 711 and 2
The lens 7 is sandwiched between two lens barrels 710 and 710 '.
The holding frame 72a that holds 2 [see FIG. 1 (b)] is screwed. The shaft 74 has an L shape, and the coil 7
9 (79p, 79y) is a flat coil.
Further, a position detecting element (PSD: semiconductor position detector) 78
The mounting portion of (78p, 78y) becomes a hard substrate 716 ', which is thermocompression bonded to the flexible substrate 716. But,
The basic structure is the same as that of the conventional example shown in FIG.

In FIG. 1, the mechanical lock ring 11 constitutes a locking means, the mechanical lock coil 12 and the permanent magnet 13 and the yoke 14 facing the mechanical lock coil 12 constitute a locking drive means, and the mechanical lock spring 15 is an elastic means. Make up. Further, the lens 71, the holding frame 72a, and the protrusion 16 form shake correction means.

The mechanical lock ring 11 is supported on the back surface of the lens barrel 710 so as to be rotatable around the optical axis, and when it is rotated, the cam portions 11a (four places) forming the locking portion of the locking means are supported by the support frame 72. The projections 16 (four positions provided on the holding frame 72a) on the back surface of the are locked. This will be described with reference to FIG.

FIG. 2A shows an unlocked state of the shake correcting means. In this state, the protrusion 16 is separated from the cam portion 11a, and the shake correction unit can freely move within this range. However, when the mechanical lock ring 11 rotates in the direction of the arrow 17 as shown in FIG. 2B, the protrusion 16 comes into contact with the inner diameter portion of the mechanical lock ring 11, and the shake correction means is locked.

The rotation in the direction of the arrow 17 is performed by the elastic force of the mechanical lock spring 15. The mechanical lock spring 15 is axially supported by a pin 15a of a fixing portion (not shown) (for example, on the lens barrel 710), one end of the mechanical locking spring 15 abuts on a stopper 15b of the fixing portion (not shown), and the other end of the mechanical locking ring 11 extends. It is in contact with the upper pin 11b. And FIG.
In the locked state as shown in FIGS. 2A and 2B, the pin 11b on the mechanical lock ring 11 abuts against the charge member 15e of the fixed portion (not shown) to prevent rotation. The tangential force for rotating the mechanical lock ring 11 is 15d against the spring force 15d 'at this time (see FIG. 2B).

Next, when the mechanical lock ring 11 is rotated by the mechanical lock coil 12 in the direction opposite to the arrow 17 against the spring force of the mechanical lock spring 15, and when the shake correction means is unlocked, the mechanical lock spring 15 has the spring force. 15
The tangential force of the mechanical lock ring 11 with respect to c ′ is 15c [see FIG. 2 (a)]. That is, the spring force of the mechanical lock spring 15 is smaller in the unlocked state than in the locked state. Normally, when a spring moves against the spring force, the spring force increases, but in the present embodiment, it decreases.

The reason for this is that when the anti-vibration system is used, the mechanical lock ring 11 is set to the state shown in FIG. 2 (a) and the shake correction means is set to the unlocked state. I need to put it. This is because when the locking drive means is composed only of the coil and the permanent magnet (including the yoke) as shown in FIG. 1A, it does not have a self-holding function, and therefore when the energization is stopped, the spring force of the mechanical lock spring 15 is applied. This is because the mechanical lock spring 15 is in the locked state, but if the spring force of the mechanical lock spring 15 is large at that time, it is necessary to increase the electric power to the mechanical lock coil 12 for holding and releasing the locking.
When the camera is equipped with the image stabilization system including the shake correction means locking device of the present embodiment, the image stabilization is started by half-pressing the release button (SW1) as described with reference to FIG. In this case, the half-pressed time is extremely longer than the actual exposure time, and it is not preferable that the mechanical lock coil 12 requires a large amount of power in order to hold the unlocking during this time. Therefore, the spring force of the mechanical lock spring 15 is reduced when the lock is released.

Further, when the shake correcting means is locked, FIG.
As shown in (b), the spring force 15d 'of the mechanical lock spring 15 becomes large, and once in the locked state, the locked state is maintained very stably.

The cam portion 11a is the mechanical lock ring 11
Since the cam surface (tapered surface) is formed along the rotation direction (direction of arrow 17), even if the support frame 72 is not stable about the optical axis, the mechanical lock ring 11 rotates in the direction of arrow 17. The cam surface can push up the protrusion 16 to move the shake correction unit to a desired position and lock it.

As described above, since the mechanical lock coil 12 itself does not have the self-holding ability, the mechanical lock ring 11 rotates in the direction of the arrow 17 when the power is cut off, and the projection 16 of the support frame 72 abuts. Since the surface is a cam surface (the shape of the cam portion 11a formed on the mechanical lock ring 11), one of the objects of the present invention is that "the shake correction means can be locked from any state". It is also possible to "obtain a locking drive means that is compact and does not need to be equipped with a means for backing up a power source."

The spring force of the mechanical lock spring 15 is large in the locked state as indicated by 15d in FIG. 2 (b). Therefore, the driving force of the mechanical lock coil 12 requires a large force when the mechanical lock ring 11 is rotated in the direction opposite to the arrow 17.

FIG. 3 is a timing chart showing the power supply state to the mechanical lock coil 12, in which the vertical axis represents power and the horizontal axis represents time.

In FIG. 3 (a), when unlocking the shake correcting means (that is, at the time of starting the image stabilization), a large amount of electric power is applied to the mechanical lock coil 12 and the mechanical lock ring 11 is moved to the arrow 17 with a large force. Drive in the opposite direction. This time is, for example, about 20 msec, which is not large as total power.

When the locking is released, the mechanical force of the mechanical lock spring 15 becomes small, so the driving force of the mechanical lock coil 12 against the spring force may be small. During this period (for example, about 10 seconds of photographing). When the person is aiming at the subject), the power is reduced.

As a method of reducing the electric power, by energizing the mechanical lock coil 12 by PWM (pulse width modulation) by a control means (not shown) as shown in FIG. 4, the drive circuit itself of the mechanical lock coil 12 is turned on. We are trying to save power.
In FIG. 4, both (a) and (b) are mechanical lock coils 12.
The same voltage is applied to the
KHz pulse, and change the width of this pulse,
When the pulse width is wide as shown in (a), the power becomes large,
When the pulse width is narrow as shown in (b), the electric power becomes small.

As described above, the electric power is increased only when the unlocking drive is performed, and the power is decreased when the unlocked state is held, which is one of the objects of the present invention. Can be realized.

Next, when using an optical device equipped with the apparatus (in the case of a silver salt camera, during exposure, in the case of a video camera,
During exposure, the electric power to the mechanical lock coil 12 is increased again as shown in FIG. This is because when the stability of unlocking is most demanded in this way, the unlocking is maintained even when there is a disturbance, which is one of the objects of the present invention. It is possible to “hold the state”.

Next, when stopping the vibration isolation, the mechanical lock ring 11 is rotated in the direction of the arrow 17 to lock the shake correcting means. The rotation of the mechanical lock ring 11 in the direction of the arrow 17 is rotated by the mechanical lock spring 15. In addition to the spring force, the mechanical lock ring 11 is forcibly driven by applying electric power in the opposite direction (negative electric power) to the mechanical lock coil 12 as shown in FIG. As a result, reliable locking drive is possible. Of course, when the power is cut off, the drive in this locking direction is not possible, and the mechanical lock spring 15
Although the locking is performed only by the spring force of No. 1, compared with this case, there is an advantage that the locking is performed earlier (due to the large locking driving force) in the normal time.

FIG. 3B shows an example in which the magnitude and direction of the electric power to the mechanical lock coil 12 when stopping the vibration isolation are different from those in FIG. 3A.

That is, in FIG. 3B, a weak driving force is applied to the mechanical lock coil 12 in a direction against the spring force of the mechanical lock spring 15. Therefore, the angular velocity when the mechanical lock ring 11 is rotated by the spring force of the mechanical lock spring 15 can be suppressed, and when the locking is completed, the pin 1
It is possible to reduce the noise when 1b comes into contact with the stopper member 15e. As a result, one of the objects of the present invention is to realize "low drive sound (silence) at the time of locking".

Even with this configuration, since this function does not work when power is cut off, the drive sound cannot be lowered, but a state called power cutoff is rare and there is no problem because a low drive sound is achieved during normal operation. .

In order to reduce the angular velocity of the mechanical lock ring 11, not only the method shown in FIG.
As shown in (c), the mechanical lock coil 12 may be short-circuited at the time of locking drive to provide speed damping to reduce the angular velocity of the mechanical lock ring 11. In this case, short-circuiting the mechanical lock coil 12 causes power interruption. It can be done instantly, and has the advantage that the drive noise can be reduced even when the power is cut off.

Generally, in the early stage of driving the members, a driving force is required to overcome static friction between the members and to start moving the members. Once the members start moving, dynamic friction occurs between the members. Since it is smaller than static friction, it requires less driving force.

Focusing on this fact, the mechanical lock ring 11 of this embodiment is also provided with a driving force (electric power required for unlocking in FIG. 3) that overcomes static friction only in the initial stage of driving, and the mechanical lock ring 11 is driven. Since the driving force can be reduced (that is, the power for driving can be reduced) after the movement starts, power consumption is saved.

In FIG. 5, at (a), the same electric power as in FIG. 3 is applied to the mechanical lock coil 12 at the initial stage of unlocking to start the operation of the mechanical lock ring 11, and the electric power is supplied at the latter stage of unlocking thereafter. An example is shown in which the power consumption is reduced by lowering it.

In the present embodiment, the switching of the electric power magnitude is performed in the time from the beginning of the unlocking (for example, the driving power is high for 10 msec from the beginning of the unlocking), but the operation of the mechanical lock ring 11 itself. May be detected by a switch or a position sensor, and the electric power may be reduced when the mechanical lock ring 11 starts moving.

Further, in FIG. 5A, the lock release holding is completed, and the mechanical lock ring 11 is locked in the locking direction (arrow 1).
7), the mechanical lock coil 12 is supplied with electric power in the reverse direction by the same amount as in FIG. 3A at the beginning of driving, but thereafter the electric power is reduced.

In FIG. 5B, at the beginning of the locking drive, the brake in the locking direction shown in FIG. 3B (energization of the mechanical lock coil 12) is weakened (power of the mechanical lock coil 12 is weakened), and the mechanical lock is applied. The spring force of the spring 15 is increased to act on the mechanical lock ring 11, and the mechanical lock ring 1
1 to overcome the static friction in the locking direction and drive it, then
The mechanical lock coil 12 is energized to provide a braking force that weakens the spring force of the mechanical lock spring 15 to reduce noise.

With such a configuration, as shown in FIG.
Compared to the method (b), it is possible to further reduce the power consumption, and the above-mentioned "energy saving of the locking drive means" is further advanced.

Regarding the driving of the mechanical lock ring 11 in the locking direction, as shown in FIG. 5 (c), the mechanical lock coil 12 is first energized in the reverse direction to overcome the static friction. At this time, the spring force of the mechanical lock spring 15 and the driving force of the mechanical lock coil 12 are applied, and when the mechanical lock ring 11 starts to move in the locking direction, the mechanical lock coil 12 is energized in the forward direction as shown in FIG. 5B. May be performed, and a braking force in the locking direction may be applied to reduce noise.
During this time, the mechanical lock coil 12 may be short-circuited.

Further, in the present embodiment, the mechanical lock coil 12 is directly attached to the mechanical lock ring 11 (locking means), but this is also the point of the present invention. If the driving force of the mechanical lock coil 12 is transmitted to the locking portion by the drive transmission means such as gears, cams and links,
Due to the friction between them, the holding means has a self-holding force. Therefore, even when the power is cut off, the mechanical lock coil 1
Although electricity is no longer applied to 2, the locking operation cannot be performed if the friction of the drive transmission means is larger than the spring force of the mechanical lock spring 15.

Therefore, in this embodiment, the mechanical lock coil 12 is directly attached to the mechanical lock ring 11 to have a direct drive structure. Of course, if the friction of the drive transmission means is negligible with respect to the spring force of the mechanical lock spring 15, it is not necessary to use a direct drive structure. For example, as the drive transmission means, not a gear or a mechanical lock coil for driving, A coreless motor may be used (the coreless motor does not have self-holding force). What is important here is that the self-holding force of the coil, coreless motor, etc. is used for driving the locking means in order to achieve the above-mentioned purpose "the vibration correction means can be locked in any state". This means that a drive means having no self-holding force is used and a drive means having a self-holding force such as a DC cored motor, a step motor, a solenoid (plunger) is not used.

(Second Embodiment) FIG. 6 is an exploded perspective view of a shake correcting means locking device according to a second embodiment of the present invention.
The same parts as those in FIG. 1 are designated by the same reference numerals.

The difference from FIG. 1 is that the mechanical lock ring 11 is
A projecting portion 11c is provided to the pin 11a so that the pin 18a extending from the drive transmission disk 18 comes into contact with the projecting portion 11c. Then, the spring 1 is interposed between the pin 18a and a pin 19a extending from a fixing portion (not shown) (for example, on the lens barrel 710).
9 (elastic means) is charged and hung. or,
The shaft 18b of the drive transmission disk 18 is fitted into a fixed portion (not shown) (for example, on the lens barrel 710) so that it can rotate smoothly.

FIG. 7 (a) is a diagram showing the state of the mechanical lock ring 11 when the lock is released. At this time, the spring force between the pins 19a and 18a is 19b ', but the drive transmission disk 18 is Since the torque (tangential force 19b applied to the drive transmission disk 18) for rotating the mechanical lock ring 11 in the direction of arrow 110 is small, the force for rotating the mechanical lock ring 11 in the direction of arrow 17 by this pin 19 is small. Therefore, a small amount of electric power is applied to the mechanical lock coil 12 'to hold the unlocked state. Further, when locked, the tangential force is 19c [Fig. 7 (a)].
[See], the locked state can be stably maintained. Therefore, it is possible to realize one of the objects of the present invention, such as "performing unlocking and holding with power saving".

Further, the arrangement of the mechanical lock coil 12 'as shown in FIG. 7A has the following merit.

The permanent magnet 7 is also used for driving the shake correction means.
13p and 713y, but the mechanical lock coil 1
The arrangement of the permanent magnet 13 for driving the second permanent magnet 713p,
713y is arranged parallel to the optical axis direction [Fig.
(A), FIG. 7 (b)], the magnetic fluxes of the permanent magnets 713, 13 'have the same magnetic path 13a', and the magnetic flux density between the gaps in which the coil 79 and the mechanical lock coil 12 'are arranged is It can be enlarged. Therefore, a large mechanical lock ring driving force can be obtained even with a small electric power, and the same "power saving locking driving means" as described above can be obtained.

Further, the permanent magnet 13 to be arranged has the same shape as the permanent magnets 713p and 713y or a shape obtained by cutting this dimension, and the permanent magnet of the same part for driving the shake correction means is used. By reducing the types of parts, costs can be reduced and assembly management can be simplified.

As shown in FIG. 7C, when the mechanical lock coil 12 is arranged in the magnetic path for driving the shake correcting means, one of the objects of the present invention, "low cost locking drive" is provided. You can get the means.

(Third Embodiment) FIG. 8 is an exploded perspective view of a shake correcting means locking device according to a third embodiment of the present invention.
The same parts as those in FIG. 1 are designated by the same reference numerals.

The difference from the first embodiment (FIG. 1) is that
That is, the locking drive means has a moving magnet configuration.

In FIG. 8, a fixed portion (not shown) (for example,
The mechanical lock ring 11 is driven by the relationship between the mechanical lock coil 12 fixed on the lens barrel 710) and the permanent magnet 13 fixed on the mechanical lock ring 11.
When the mechanical lock coil 12 is arranged on the fixed side in this way,
Processing of the lead wire is simple (when the coil is placed on the drive side, it is necessary to handle the lead wire so as not to interfere with its driving), so that the assembling property is improved and the lead wire is broken by the drive. Since there are no problems, durability is also improved.

(Fourth Embodiment) FIG. 9 is an exploded perspective view of a shake correcting means locking device according to a fourth embodiment of the present invention.
The same parts as those in FIG. 1 are designated by the same reference numerals.

The difference from the first embodiment (FIG. 1) is that
An electromagnet 21 composed of a yoke 21a and an adsorption coil 21b is provided on a fixed portion (for example, on a lens barrel 710), and an iron piece 22 is provided on the mechanical lock ring 11 so as to abut each other when unlocked. It is configured to hold the lock release by the suction force.

The electromagnet 21 generates a strong attracting force with a small amount of electric power once the iron piece 22 is attracted.
The purpose of the present embodiment is to drive the mechanical lock ring 11 with the mechanical lock coil 12 until it is brought into contact with the electromagnet 21 and attract it, and to hold and release the lock with the electromagnet 21 with less electric power.

FIG. 10A shows a timing chart at the time of the operation, and at the time of unlocking driving, electric power 31 is applied to the mechanical lock coil 12 to drive the mechanical lock ring 11. At this time, the holding power 32 also starts to flow to the adsorption coil 21b of the electromagnet 21. Then, when the iron piece 22 is attracted to the electromagnet 21, the supply of the locking drive power 31 is stopped.

In this embodiment, the electric power is stopped for a certain period of time from the start of unlocking, but the fact that the iron piece 22 is adsorbed by the electromagnet 21 is switched (for example, the iron piece 22 and the electromagnet 21).
May contact each other and be electrically connected to each other) or a position sensor to stop the supply of the unlocking power.

As described above, since the electromagnet 21 exhibits a strong attracting force even with a small amount of electric power, by adopting such a structure, one of the objects of the present invention is "perform unlocking and holding with power saving". It becomes possible.

In FIG. 10A, the holding power 32 is increased at the time of exposure. Therefore, the iron piece 22 is held by a stronger attraction force. As a result, one of the objects of the present invention is to achieve "reliable unlocking and holding".

At the time of locking, the energization of the adsorption coil 21b is cut off and the mechanical lock ring 11 is driven in the locking direction by the spring force of the mechanical lock spring 15. Therefore, even when the power is cut off, the energization to the adsorption coil 21b is cut off, so that the shake correction means is locked, and the purpose that "the shake correction means can be locked in any state" can be achieved. It will be possible.

As a holding method for releasing the lock, as shown in FIG.
As shown in 0 (b), the mechanical lock coil 1
It is also possible to continue applying a small electric power 31a to 2 to further stabilize the unlocking and holding. Because, in general, electromagnet 2
In No. 1, when the iron piece 22 separates, its attracting force weakens acceleratingly (the attracting force is inversely proportional to the square of the distance between the electromagnet 21 and the iron piece 22). However, since the driving force of the mechanical lock coil 12 is almost constant regardless of the rotational position of the mechanical lock ring 11, it is possible to prevent the iron piece 22 from coming off from the electromagnet 21 due to such a disturbance. In addition, by increasing the power supplied to the mechanical lock coil 12 during exposure, as in the case of 31b, it is possible to achieve the purpose of "reliably maintaining the unlocked state of the shake correction means".

(Fifth Embodiment) FIG. 11 is an exploded perspective view of a shake correcting means locking device according to a fifth embodiment of the present invention. The same parts as those in FIG. 9 are designated by the same reference numerals.

The difference from the fourth embodiment (FIG. 9) is that
Instead of the electromagnet 21 and the iron piece 22, a permanent magnet 42 and a yoke 43 are provided in a fixed portion (for example, on the lens barrel 710), and a holding coil 41 fixed to the mechanical lock ring 11 is provided in the magnetic field. . During the unlocking and holding, the holding coil 41 may be energized to hold the unlocking.

Generally, when a coil is driven and moves in a magnetic field, a magnetic field sufficient to cover the driving stroke width of the coil is required, and the permanent magnet becomes large.

However, as for the permanent magnet 42, the holding coil 41 is used only when holding, and the driving force does not change. Therefore, it is not necessary to enlarge the permanent magnet 42 and it can be made compact.

Since the mechanical lock coil 12 is driven and moves, it is necessary to make the opposing permanent magnets 13 large enough to cover their strokes. Next, in order to reduce the size of the permanent magnets 13, The method described may be used.

As shown in FIG. 12A, the cam surface 11a of the mechanical lock ring 11 is composed of an irreversible portion and a reversible portion. When the shake correction means is in the locked state, as shown in FIG.
Since the protrusion 16 is located at the irreversible portion of the mechanical lock ring 11 as in (a) of 3 (a), even if the shake correction means swings due to a disturbance in this state, the mechanical lock ring is rotated by the force. There is nothing.

When the mechanical lock coil 12 is energized 51a [see FIG. 13 (b)] to release the lock from this state, the mechanical lock ring 11 starts to rotate, and the mechanical lock ring 11 starts rotating as shown in FIG. 13 (a).
It becomes the state of (b). Then, the protrusion 16 becomes the cam surface 11
Enter the reversible part of a (rotation of locking means: 52a).

Next, when the shake correction means is driven in the direction of arrow 55 as shown in FIG.
Pushes the cam surface 11a to rotate the mechanical lock ring 11. When the mechanical lock ring 11 has finished rotating up to the region where the holding means (electromagnet or holding coil) operates, the shake correction means is returned to its original position [see (d) in FIG. 13 (a)].

The relationship between the mechanical lock coil 12 and the permanent magnet 13 facing each other is as shown in FIG. 12 (b) ((a) of FIG. 13 (a) is the locked position), and the mechanical lock coil 1 is initially set.
The two effective portions 12a and 12b of 2 are both magnets 13a and 1
3b (opposite poles to each other), the thrust can be used effectively when the mechanical lock coil 12 is energized (at this time,
(Mecha lock ring 11 starts unlocking). After that, the mechanical lock coil 12 moves in the direction of the arrow 56, and this thrust weakens each time the effective portion 12a moves away from the magnet 13a. In order to prevent this, the permanent magnet 13 and the mechanical lock coil 12 must be enlarged in the moving direction. However, even if the thrust is weakened, if the protrusion 16 is located at the reversible portion of the cam surface 11a at this time, the mechanical lock ring 11 is also rotated by the driving force of the shake correction means, so that the thrust can be supplemented.

Therefore, it is possible to achieve the object "to enable reliable unlocking with a compact and power-saving locking means".

As another method of utilizing the operation of the shake correcting means for the locking means, it can be used at the time of locking contrary to the time of unlocking as described above.

Since the mechanical lock ring 11 is elastically biased in the locking direction by the mechanical lock spring 15 when locked, during locking driving, the mechanical lock ring 11 is rotated in the locking direction by the mechanical lock spring 15. When stopped, the stopper 11b comes into contact with the stopper 11b to generate an impact sound. In order to reduce this noise, the mechanical lock coil 12 has been used (short circuit, reverse energization) in the above examples. However, paying attention to the fact that the rotation angular velocity of the mechanical lock ring 11 is slow at the start of rotation and is high at the end of rotation and a large impact sound is generated. As a method for preventing the occurrence of noise, shake correction means is used as shown in FIG.

As shown in (a) of FIG. 14 (a), at the start of locking, the support frame 72 of the shake correcting means is moved in the direction of arrow 61 (the shake correcting means is driven). When the mechanical lock ring 11 is rotated in the locking direction by the force of the mechanical lock spring 15 in this state, the protrusion 16 immediately after the rotation starts, the cam surface 11a.
Abut (for this, the impact noise is small).

Next, as shown in (b) of FIG. 14 (a), the shake correction means is driven in the direction of the arrow 62 (for example, returned to the center for about one second), and along with that. Protrusion 1
Since 6 moves away from the cam surface 11a, the mechanical lock ring 11 rotates in the direction of arrow 17, and the locking is completed silently as shown in (c) of FIG. 14 (a).

FIG. 14B shows a timing chart at the time of the above-mentioned operation, and the image stabilization is performed until the time point of the arrow 67 (the position 63a of the shake correction means performs the image stabilization operation).

When the image stabilization is turned off (waveform 66) at the position of arrow 67, the shake correction means is driven in the direction of arrow 61 at this point (waveform 636). At this time, the mechanical lock ring 11 starts the locking operation (stops unlocking and holding) (waveform 65 is a locking start signal). After that, when the shake correcting means is slowly returned to the center like the waveform 63c, the mechanical lock ring 11 also slowly rotates like the waveform 64, and at the time 64a, the mechanical lock ring 11 comes into contact with the stopper 11b to complete the locking. To do.

By the above method, the mechanical lock coil 12
It is possible to achieve the object of "reducing the driving sound of the locking means at the time of locking / unlocking" which is one of the objects of the present invention without energizing the device.

(Modification) The present invention assumes a shift optical system that moves an optical member in a plane perpendicular to the optical axis as the shake correction means. It is also possible to move the shooting surface within a plane perpendicular to the axis.

Further, although the present invention has been described as applied to a camera such as a single-lens reflex camera, a lens shutter camera and a video camera, it may be applied to other optical devices and other devices, and also as a constituent unit. Is something that can be done.

Furthermore, the present invention may be constructed by appropriately combining the above-described embodiments or their techniques.

[0151]

As described above, according to the present invention,
Locking drive means that does not have self-holding force is used, locking drive means is composed of coil and permanent magnet, direct drive structure (locking means and magnetic field generating means is integrated), locking The driving means can be driven in both the locking direction and the unlocking direction, or the locking means has an irreversible portion that is not unlocked by driving (swinging) of the shake correction means, or When the driving power is cut off, the holding release of the holding means is stopped, the shake correction means is held unlocked by an electromagnet, or the shake correction means is held released by a coil and a permanent magnet. ing.

Therefore, the apparatus can be made compact, the means for backing up the power source is not required, and the shake correcting means can be stably locked by the locking means in any state such as when the power is cut off. it can.

Further, according to the present invention, when the shake correction means is locked, the locking drive means applies a force to the locking means in a direction in which the biasing force in the locking direction is weakened, or the locking drive means is operated. Short-circuiting to add viscous resistance, changing the speed at which the locking means is driven to reduce the speed at the end of driving when locking or unlocking the locking means, To reduce the driving force at the end of driving at the time of stopping or unlocking, to increase the braking force at the end of driving at the time of locking or unlocking the locking means, or to set the shake correction means. By driving (swinging), the operation of the locking means is regulated.

Therefore, the locking means can be made compact, and the drive noise when locking and unlocking the shake correcting means can be reduced.

Further, according to the present invention, the magnetic field of the shake correction means is used as the locking drive means, and the driving force to the coil is increased only when the static friction is overcome. (Pulse modulation drive) PWM drive, in the direction in which the driving force is small, the driving power of the coil is reduced, the driving force of the shake correcting means is used to drive the locking means, and the shake correcting means is driven. A retaining means dedicated to retaining and releasing the lock is provided, or the biasing force of the elastic means is prevented from increasing along with the locking drive.

Therefore, power saving can be achieved when the locking means is driven.

Further, according to the present invention, the locking drive is performed by the magnetic field of the shake correction means, or the shake correction means has the same shape or a magnet obtained by dividing the permanent magnet is used as the locking drive means. ing.

Therefore, cost reduction of the device can be achieved.

Further, according to the present invention, the lock release of the shake correction means is held by the electromagnet, or the biasing force at the lock release hold is weakened.

Therefore, power saving can be achieved when the shake correcting means is held in the unlocked state.

Further, according to the present invention, the holding drive means and the holding means are simultaneously driven, and the holding force of the holding means is increased when the optical device in which the apparatus is mounted is used.

Therefore, when more stability is required, it is possible to reliably hold the unlocked state of the shake correcting means.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a shake correction means locking device according to a first embodiment of the present invention.

FIG. 2 is a mechanism diagram showing a locked state and a unlocked state of a shake correction unit by the locking device of FIG.

FIG. 3 is a timing chart showing an operation when power is supplied to the mechanical lock coil 12 of FIG.

FIG. 4 is a diagram showing a specific example of power supply to the mechanical lock coil 12 of FIG.

5 is a timing chart showing another example of the operation at the time of supplying power to the mechanical lock coil 12 of FIG.

FIG. 6 is an exploded perspective view of a shake correction means locking device according to a second embodiment of the present invention.

7 is a mechanism diagram for explaining a locking unit and a locking driving unit of FIG.

FIG. 8 is an exploded perspective view of a shake correction means locking device according to a third embodiment of the present invention.

FIG. 9 is an exploded perspective view of a shake correction means locking device according to a fourth embodiment of the present invention.

FIG. 10 is a timing chart showing the operations of the locking means of FIG. 9 for unlocking driving, unlocking holding and locking.

FIG. 11 is an exploded perspective view of a shake correction means locking device according to a fifth embodiment of the present invention.

12 is a mechanism diagram for explaining a structure of a locking unit and a locking driving unit of FIG.

FIG. 13 is a diagram for explaining a series of operations when the shake correcting means of FIG. 11 is moved to perform locking by the locking means.

FIG. 14 is a diagram for explaining a series of operations in another example when moving the shake correcting means itself in FIG. 11 to perform locking by the locking means.

FIG. 15 is a mechanism diagram showing a schematic configuration of a conventional vibration isolation device.

16 is an exploded perspective view showing a specific configuration example of the correction means in FIG.

17 is a diagram showing a drive control system of the correction means in FIG.

FIG. 18 is a circuit diagram showing a specific configuration example of each circuit in FIG.

19 is a diagram showing a configuration of the locking device shown in FIG.

FIG. 20 is a block diagram showing a schematic configuration of a camera including a conventional image stabilization device.

[Explanation of symbols]

 11 mechanical lock ring 12 mechanical lock coil 13 permanent magnet 14 yoke 15,19 mechanical lock spring 16 protrusion 18 drive transmission disk 21 electromagnet 21a yoke 21b adsorption coil 22 iron piece 41 holding coil 42 permanent magnet 43 yoke 71 lens 72 support frame 72a holding frame 79p, 79y permanent magnet

Claims (36)

[Claims] 1. A locking means for locking a shake correction means for correcting image shake, and a driving means for locking the shake correction means at a predetermined position or the lock means. From the state to the unlocked state or hold the unlocked state,
A shake correction means locking device having locking driving means that does not have self-holding force when not driven. 2. The shake correcting means locking device according to claim 1, wherein the locking driving means is composed of a coil and a magnetic field generating means arranged so as to face the coil. 3. The shake correcting means locking device according to claim 2, wherein the coil or the magnetic field generating means is provided in the locking means. 4. The shake correction means locking device according to claim 2, wherein the magnetic field generation means uses a magnetic field of an electromagnetic means for driving the shake correction means. 5. The shake correction means locking device according to claim 4, wherein the coil is provided in a magnetic field of the electromagnetic means. 6. The shake correcting means locking device according to claim 2, wherein the magnetic field generating means also serves as a magnetic field and a magnetic path of the electromagnetic means. 7. The magnetic field generating means has a first permanent magnet, and the first permanent magnet is the same as the second permanent magnet of the electromagnetic means for driving the shake correcting means or the second permanent magnet. The shake correction means locking device according to claim 2, wherein the permanent magnet is a magnet formed by cutting the permanent magnet. 8. The shake correction means according to claim 2, wherein the drive power of the coil is different between when the shake correction means is unlocked and when the lock is held. Locking device. 9. The shake correction means according to claim 8, wherein the drive power of the coil when the shake correction means is held in the unlocked state is smaller than that when the lock is released. Locking device. 10. The shake correction means locking device according to claim 8, wherein the switching of the driving power is performed by pulse width modulation. 11. The direction of the drive current to the coil is opposite when the shake correction means is unlocked and when the shake correction means is unlocked. The shake correction means locking device according to claim 2. 12. The shake according to claim 2, wherein the drive power of the coil is different when the shake correction unit is in the unlocked state and when the shake correction unit is in the locked state. Correcting means locking device. 13. The shake correction means according to claim 12, wherein the drive power of the coil when the shake correction means is brought into the locked state is smaller than that when the coil is brought into the unlocked state. Locking device. 14. An elastic means for urging the locking means in a locking direction of the shake correction means, wherein the locking drive means is configured to set the elastic means when the shake correction means is brought into a locked state. 3. The braking is applied to the urging force of the.
The shake correction means locking device described. 15. The shake correction means member according to claim 14, wherein the braking by the lock driving means is a force for urging the lock means in a lock release direction of the shake correction means. Stop device. 16. The braking force is generated by applying drive power to the coil in a direction to unlock the shake correcting means or by short-circuiting the coil. Shake correction means locking device. 17. A locking means for locking a shake correction means for correcting image shake, and a driving means for locking the shake correction means at a predetermined position or the lock means. A shake correction means locking device comprising locking driving means for changing the speed at the time of driving, for changing the state from the locked state to the unlocked state and maintaining the unlocked state. 18. The driving speed of the locking means at the end of driving when the shake correction means is brought into the unlocked state or at the end of driving when brought into the locked state 18. The shake correction means locking device according to claim 17, which is slower than that. 19. The driving force of the locking driving means at the end of driving when the shake correction means is in the unlocked state or at the end of driving when the shake correcting means is in the locked state It is smaller than that at the initial stage, and it is characterized in that
8. The shake correction means locking device according to item 8. 20. The braking force at the end of driving when the shake correction means is brought into the locked state is larger than at the start of driving when brought into the locked state. Shake correction means locking device. 21. Locking means for locking the shake correcting means for correcting image shake, and driving the locking means to lock the shake correcting means in the unlocked state at a predetermined position. Or a shake correction means locking device including locking driving means for changing the locked state to the unlocked state, wherein the locking means receives an external force by means other than the locking driving means. A shake correction means locking device comprising: a reversible portion that changes the external force into its own rotational force, and an irreversible portion that does not change the external force into its own rotational force. 22. The shake correcting means locking device according to claim 21, wherein the irreversible portion of the locking means is a portion for holding the shake correcting means in a locked state. 23. The shake correcting means locking device according to claim 21, wherein the shake correcting means is driven to transmit an external force to the reversible portion of the locking means. 24. Locking means for locking the shake correcting means for correcting image shake, and driving the locking means to lock the shake correcting means at a predetermined position or the lock. Shake correction provided with locking drive means for changing the state from the locked state to the unlocked state and for holding the unlocked state, and holding means for holding the locking means in the unlocked state of the shake correcting means. Means locking device. 25. The shake correction means locking device according to claim 24, wherein the holding means is means for stopping the holding of the locking means by cutting off the power supply to the locking drive means. 26. The shake correction means locking device according to claim 24, wherein the holding means is an electromagnet. 27. The shake correcting means locking device according to claim 24, wherein the holding means is composed of a coil and a magnetic field generating means arranged so as to face the coil. 28. The shake correction means locking device according to claim 24, wherein electric power is supplied to both the locking driving means and the holding means at least when an optical device equipped with the device is used. . 29. The shake compensating device locking device according to claim 28, wherein the holding force of the holding device is strengthened at least when an optical device equipped with the device is used. 30. Locking means for locking the shake correcting means for correcting image shake, and driving the locking means to lock the shake correcting means in the unlocked state at a predetermined position. Or a shake correction means locking device including locking drive means for changing the locked state to the unlocked state, and elastic means for urging the locking means in the locking direction of the shake correction means. The shake correction means locking device is characterized in that the biasing force of the elastic means is weaker at the time of completion of unlocking of the shake correction means by the locking means than before completion thereof. 31. The elastic means has a range in which an elastic force thereof becomes weaker as the locking means is driven in a direction to move the shake correcting means from the locked state to the unlocked state. 31. The shake correction means locking device according to claim 30. 32. The locking means is means for changing the state of the shake correcting means by rotation, and the rotation biasing force applied to the locking means by the elastic means is before the completion of unlocking of the shake correcting means. 31. The shake correction device locking device according to claim 30, wherein the locking device is smaller when unlocking is completed. 33. The locking means is a means for changing the state of the shake correcting means by rotation, and the elastic means is a means for rotating the locking means by applying an urging force to a rotating disk. 31. The shake according to claim 30, wherein the rotation biasing force that the means applies to the locking means via the rotating disk is smaller when the unlocking is completed than before the unlocking of the shake correcting means is completed. Correcting means locking device. 34. Locking means for locking the shake correcting means for correcting image shake, and driving the locking means to lock the shake correcting means in the unlocked state at a predetermined position. Or a locking drive means for changing the locked state to the unlocked state, and when the locking means locks the shake correcting means, the shake correcting means locks the locking means. A shake correction means locking device that brakes the vehicle. 35. The shake correcting means according to claim 34, wherein the shake correcting means is driven to a position out of a locked position by the locking means when being changed to a locked state. Stop device. 36. The shake correcting means is returned to the vicinity of the locked position after being driven to a position deviated from the locked position and before being held in the locked state. 34. A shake correction means locking device described in 34.