JPH1026784A - Shake correcting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the accuracy of drive for correcting a shake by reducing the rolling backlash of a supporting frame. SOLUTION: This shake correcting device constituted by being provided with a supporting means 12 for regulating a correcting means for correcting the shake only in a first direction by plural fitting parts, plural radial shafts radially extended from the center of correction by the correcting means to the plural fitting parts on a plane perpendicular to the first direction, and elastic means 18 for elastically connecting the correcting means to the supporting means 12, along the plural radial shafts. At this time, the elastic means 18 are constituted as tension springs for connecting the vicinity of the peripheral edge part, of the correcting means to the vicinity of the peripheral edge part of the supporting means 12 and structured so that the correcting means is pulled outward by the tension springs, for elastically absorbing a backlash in the first direction (backlash around an optical axis) and the tension springs are provided in phase with the plural radial shafts, when viewed from the front side of the correcting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a shake correcting device arranged in a camera or the like for correcting an image shake caused by a shake applied to an optical device on which the device is mounted.

[0002]

2. Description of the Related Art In a current camera, all operations important for photographing, such as exposure determination and focusing, are automated, so that even an inexperienced person in camera operation is very unlikely to fail in photographing.

In recent years, a system for preventing a camera shake from being applied to a camera has been studied, and a factor which causes a photographer to fail in photographing has almost disappeared.

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

The camera shake at the time of photographing is generally a vibration of 1 Hz to 12 Hz as a frequency. At the time of release of the shutter, even if such camera shake occurs, it is possible to take a picture without image shake. As a basic idea, it is necessary to detect the camera shake caused by the camera shake and to displace the correction lens according to the detected value. Therefore, in order to achieve a photograph that does not cause image shake even if camera shake occurs, first, it is necessary to accurately detect camera shake, and second, to correct optical axis change due to camera shake. Required.

In principle, this vibration (camera shake) is detected by means of vibration detecting means for detecting angular acceleration, angular velocity, angular displacement, etc., and by integrating the output signal of the sensor electrically or mechanically. The camera shake detecting means for outputting the angular displacement can be mounted on the camera. And
By driving the correction optical device that decenters the photographing optical axis based on this detection information, image blur can be suppressed.

Here, an outline of an anti-vibration system using vibration detecting means will be described with reference to FIG.

The example of FIG. 27 is a diagram of a system for suppressing an image shake caused by a camera vertical shake 81p and a horizontal shake 81y in a direction indicated by an arrow 81.

In the figure, reference numeral 82 denotes a lens barrel, 83p, 83
y is a vibration detecting means for detecting a camera vertical vibration and a camera horizontal vibration, respectively.
This is indicated by 84y. 85 is a correction optical device (86p, 8
6y is a coil for applying a thrust to the correction optical device 85, 8
Reference numerals 6p and 86y denote position detecting elements for detecting the position of the correcting means 85. The correcting optical device 85 is provided with a position control loop, which will be described later, and is driven by using the outputs of the vibration detecting means 83p and 83y as target values. , The stability on the image plane 88 is ensured.

FIG. 28 is an exploded perspective view showing the structure of a shake correction device (which will be described in detail later, which includes correction means and means for supporting and locking the correction means, which will be described later). This structure will be described below with reference to FIGS. 28 to 37.

The rear protruding ears 71a (three places (one part is hidden and invisible)) of the main plate 71 (the enlarged view is shown in FIG. 31) are fitted into a lens barrel (not shown), and a well-known lens barrel roller or the like has a hole. It is screwed to 71b and fixed to the lens barrel.

The second yoke 72, which is made of a magnetic material and selectively plated, is screwed through the hole 72a into the hole 7 of the base plate 71.
1c. The second yoke 72 has a permanent magnet (shift magnet) 7 such as a neodymium magnet.
3 are magnetically attracted. The magnetization direction of each permanent magnet 73 is the direction of the arrow 73a shown in FIG.

A support frame 75 (an enlarged view in FIG. 32) to which a correction lens 74 is fixed by a C-ring or the like is provided with a coil 76p,
76y (shift coil) is forcibly pushed and joined (hereinafter, this is referred to as "patch-in bonding") (FIG. 3).
2 is not adhered), and light emitting elements 77p and 77 such as IRED
y is also adhered to the back of the support frame 75, and the slits 75ap,
The emitted light is incident on position detection elements 78p and 78y such as PSDs described later through 75ay.

In the holes 75b (three places) of the support frame 75, PO
Support ball 79 with a spherical tip such as M (polyacetal resin)
a, 79b and the charge spring 710 are inserted (FIG. 29).
Also, see FIG. 31), the support ball 79a is thermally caulked and fixed to the support frame 75 (the support ball 79b is a charge spring 71).
(It can slide in the extending direction of the hole 75b against the spring force of 0).

FIG. 29 is a cross-sectional view after assembling the shake correcting device. The supporting ball 79b, charged charge spring 710, and supporting ball 79a are inserted into the hole 75b of the supporting frame 75 in the direction of arrow 79c in this order. (The supporting balls 79a and 79b are parts having the same shape.) Finally, the peripheral end portion 75c of the hole 75b is thermally caulked to prevent the supporting ball 79a from coming off.

FIG. 30A is a cross-sectional view of the hole 75b in a direction perpendicular to FIG. 31, and FIG. 30B is a plan view of the cross-sectional view of FIG. FIG. 3B shows the depth of the range indicated by reference numerals A to D in FIG.
A to D of 0 (a) are shown.

Here, since the rear end of the wing portion 79aa of the supporting ball 79a is received and regulated in the range of the depth A, the supporting ball 79a is thermally caulked at the peripheral end portion 75a so that the supporting ball 79a is supported by the supporting frame 75.
Fixed to

Since the tip of the blade 79ba of the support ball 79b is received in the range of the depth B plane, the support ball 79b comes out of the hole 75b in the direction of the arrow 79c by the charge spring force of the charge spring 710. Nothing.

Of course, when the assembling of the shake correcting device is completed, the support ball 79b is received by the second yoke 72 as shown in FIG. 17, so that the support ball 79b does not come off from the support frame 75. The B side is provided.

The holes 7 in the support frame 75 shown in FIGS.
The shape of 5b does not require a complicated inner diameter slide mold even when the support frame 75 is formed by molding, and can be molded by a simple two-part mold in which the mold is pulled out on the side opposite to the arrow 79c. Can be set strictly.

As described above, since the support balls 79a and 79b are the same parts, not only the parts cost is reduced, but also
There is no assembling error, which is advantageous in parts management.

The bearing portion 75d of the support frame 75 is coated with, for example, fluorine-based grease, and an L-shaped shaft 711 is applied thereto.
(Non-magnetic stainless steel) (see FIG. 28).
The other end of the character shaft 711 is a bearing 71 d formed on the main plate 71.
(Grease is applied in the same manner), and three supporting balls 7
9b is placed on the second yoke 72, and the support frame 75 is
Put in one.

Next, the positioning holes 712a (three places) of the first yoke 712 shown in FIG. 28 are fitted to the pins 71f (three places) shown in FIG. At five locations), the first yoke 712 is received and magnetically coupled to the ground plate 71 (by the magnetic force of the permanent magnet 73).

As a result, the back surface of the first yoke 712 comes into contact with the support ball 79a, and the support frame 75 is sandwiched between the first yoke 712 and the second yoke 72 as shown in FIG. Done.

The support balls 79a, 79b and the first yoke 71
2. Fluoro-based grease is also applied to the contact surfaces of the second yoke 72 with each other, and the support frame 75 is freely slidable with respect to the base plate 71 in a plane orthogonal to the optical axis.

The L-shaped shaft 711 is supported by the support frame 75 and the base plate 71.
Is supported so as to be slidable only in the directions of arrows 713p and 713y.
Relative rotation (rolling) around the optical axis with respect to 1 is regulated.

The L-shaped shaft 711 and the bearings 71d, 7d
The fitting play of 5d is set large in the optical axis direction, and the supporting balls 79a, 79b, the first yoke 712, and the second yoke 7
This prevents overlapping with the optical axis direction regulation due to the clamping of 2.

An insulating sheet 714 is covered on the surface of the first yoke 712, and a hard substrate 715 having a plurality of ICs (position detecting elements 78p, 78y, output amplifying ICs, coils 76p, 76y) is provided thereon. ICs, etc.) are fitted with the positioning holes 715a (two places) to the pins 71h (two places) shown in FIG. 20 of the base plate 71, and screwed together with the holes 715b and the holes 712b of the first yoke 712 to the holes 71g of the base plate 71. You.

Here, the position detecting elements 78p and 78y are positioned on the hard substrate 715 by a tool and soldered, and the flexible substrate 716 for signal transmission is also provided on the surface 716.
a is a range 715c surrounded by a broken line on the back surface of the hard substrate 715
(See FIG. 28).

A pair of arms 716 bp and 716 by extend from the flexible substrate 716 in a plane direction orthogonal to the optical axis, and hook portions 75 ep and 7 ep of the support frame 75 respectively.
5ey (see FIG. 32), and the light emitting element 77
The terminals p and 77y and the terminals of the coils 76p and 76y are soldered.

Thus, the light emitting element 77 such as an IRED
The driving of p, 77y and the coils 76p, 76y is performed from the hard substrate 715 via the flexible substrate 716.

The arm 716 of the flexible substrate 716
bp and 716by (see FIG. 32) are each provided with a bending portion 716.
cp, 716 cy, and the elasticity of the refraction reduces the load on the arms 716 bp, 716 by for the support frame 75 moving around in a plane perpendicular to the optical axis.

The first yoke 712 has a projecting surface 712c formed by die cutting, and the projecting surface 712c is
4 and directly contacts the hard substrate 715 through the hole 714a. A ground (GND: ground) pattern is formed on the hard board 715 side of this contact surface, and the first yoke 71 is screwed to the ground board to connect the hard board 715 to the ground plate.
Numeral 2 is grounded to prevent an antenna from giving noise to the hard substrate 715.

The mask 717 shown in FIG. 28 is positioned on the pins 71h of the base plate 71, and is fixed on the hard substrate 715 with a double-sided tape.

The base plate 71 has a permanent magnet through hole 71i.
(See FIGS. 28 and 31), from which the back surface of the second yoke 72 is exposed. A permanent magnet 718 (locking magnet) is incorporated in the through hole 71i, and is magnetically coupled to the second yoke 72 (FIG. 29).
reference).

A coil 720 (locking coil) is bonded to the lock ring 719 (see FIGS. 28, 29, and 33), and a bearing 719b (see FIG. 34) is provided on the back surface of the ear 719a of the lock ring 719. The armature rubber 722 is passed through the armature pin 721 (see FIG. 28), the armature pin 721 is passed through the bearing 719b, and the armature spring 72 is passed through the armature pin 721.
3 and fit into the armature 724 to fix it by caulking.

Accordingly, the armature 724 causes the lock ring 71 to move against the charging force of the armature spring 723.
9 can slide in the direction of arrow 725.

FIG. 34 is a plan view of the shake correcting device after the assembly is completed, as viewed from the rear side in FIG. 28. In FIG. 34, the outer diameter cutout portion 719c (3) of the lock ring 719 is shown.
The lock ring 719 is pushed into the base plate 71 by aligning the lock ring 719 with the base plate 71 and the lock ring 719 is turned clockwise to prevent the lock ring 719 from coming off. Attached to

Accordingly, the lock ring 719 is rotatable around the optical axis with respect to the main plate 71. However, the lock ring 719 rotates, and the notch 719 c again
The lock rubber 726 (see FIGS. 28 and 34) is pressed into the base plate 71 to prevent the bayonet connection from coming out of phase with the j, and the lock ring 719 is cut by the lock rubber 726. The angle θ of the notch 719d (FIG. 3
(See 4).

A permanent magnet 718 (locking magnet) is also attached to a magnetic yoke 727 (see FIG. 28), and its holes 727a (two locations) are fitted to pins 71k (see FIG. 34) of the main plate 71. And fit into the hole 727b
(2 places) and 71n (2 places).

The permanent magnet 718 on the base plate 71 side, the permanent magnet 718 on the locking yoke 727 side, and the second yoke 7
2. A known closed magnetic path is formed by the locking yoke 727.

The lock rubber 726 is prevented from coming off by the screw connection of the locking yoke 727. In FIG. 34, the lock yoke 727 is omitted for the above description.

The hook 719e of the lock ring 719
A lock spring 728 is hung between the hook 71m of the main plate 71 and the base plate 71 (see FIG. 34), and urges the lock ring 719 clockwise. The suction yoke 729 (FIG. 28,
The suction coil 730 is inserted into the base plate 71 (see FIG. 34), and is screwed to the bottom plate 71 with a hole 729a.

Terminal of Coil 720 and Adsorption Coil 730
The terminal of the flexible substrate 716 has a twisted pair configuration of, for example, a four-stranded tetron covered wire.
d.

The mechanism of the shake correcting apparatus described above can be roughly divided into three elements: a correcting means for decentering the optical axis, a means for supporting the correcting means, and a means for locking the correcting means. ing.

The correcting means includes a lens 74, a support frame 7
5, coils 76p and 76y, IREDs 77p and 77y,
Position detecting elements 78p, 78y, ICs 731p, 731
y, support balls 79a and 79y, a charge spring 710, and a support shaft 711. The support means includes a base plate 71, a second yoke 72, a permanent magnet 73, a first yoke 7
12. The locking means is a permanent magnet 71
8, a lock ring 719, a coil 720, an armature shaft 721, an armature rubber 722, an armature spring 723, an armature 724, a lock rubber 726, a yoke 727, a lock spring 728, a suction yoke 729, and a suction coil 730.

The lens 74 and the support frame 75, which constitute the correction means, form a correction optical system,
78p, 79y, IC731p, 731y, IRED7
7p and 77y constitute position detecting means, and the coils 76p and 7y
6y, second yoke 72, permanent magnet 73, first yoke 71
2 forms a driving means. In other words, the correcting means is mainly composed of a correcting optical system, a position detecting means, and a driving means for driving the correcting optical system.

Then, the shake correcting device, the vibration detecting means (see FIG. 27) and the calculating means shown in FIG.
An anti-vibration system (anti-vibration device) is configured.

The IC 731p on the hard substrate 715,
731y is an IC for amplifying the output of each of the position detection terminals 78p and 78y. The internal configuration is as shown in FIG. 35 (since the ICs 731p and 731y have the same configuration, only 731p is shown here).

In FIG. 35, current-voltage conversion amplifier 7
31 ap and 731 bp convert light currents 78 i 1 p and 78 i 2 p generated in the position detection element 78 p (consisting of resistors R 1 and R 2) by the light projection element 77 p into voltages, and
31cp is each current-voltage conversion amplifier 731ap, 731
The difference output of bp is obtained and amplified.

The light emitted from the light projecting elements 77p and 77y is incident on the position detecting elements 78p and 78y via the slits 75ap and 75ay as described above, but the support frame 75 is positioned on a plane perpendicular to the optical axis. When moved, the position detecting element 78p,
The position of incidence on 78y changes.

The position detecting element 78p has sensitivity in the direction of the arrow 78ap (see FIG. 28).
ap is a direction orthogonal to the arrow 78ap (78ay direction).
Spread is the light beam in the arrow 78ap direction because of the shape which the light beam is squeezed in, the photocurrent 78i ₁ p of viewing the position detecting elements 78p when the support frame 75 is moved in the arrow 713p direction,
The balance of 78i ₂ p changes and the differential amplifier 731 cp
Outputs an output according to the direction of the arrow 713p of the support frame 75.

The position detecting element 78y has a detection sensitivity in the direction of the arrow 78ay (see FIG. 28), and the slit 75ay extends in the direction (78ap direction) orthogonal to the arrow 78ay. Only when it moves in the direction of arrow 713y, the position detecting element 78y changes its output.

The addition amplifier 731dp obtains the sum of the outputs of the current-voltage conversion amplifiers 731ap and 731bp (total light receiving amount of the position detecting element 78p), and the driving amplifier 731ep receiving this signal drives the light emitting element 77p accordingly.

Since the amount of light emitted from the light emitting element 77p changes extremely unstable with temperature or the like, the absolute amount (78i) of the photocurrents 78i ₁ p and 78i ₁ p of the position detecting element 78p is accordingly changed.
i ₁ p + 78i ₂ p) changes. Therefore, the support frame 75
The output of the differential amplifier 731cp a showing the position _{(78i 1 p-78i 2 p} ) also changes.

However, if the light emitting element 77p is controlled by the above-described drive circuit so that the total amount of received light is constant as described above, the output of the differential amplifier 731cp does not change.

The coils 76p and 76y shown in FIG. 34 are located in a closed magnetic path formed by the permanent magnet 73, the first yoke 712, and the second yoke 72. The support frame 75 is driven in the direction of the arrow 713y by being driven in the direction of the arrow 713p (known Fleming's left-hand rule) and flowing current through the coil 76y.

Generally, when the outputs of the position detecting elements 78p and 78y are amplified by the ICs 731p and 731y and the coils 76p and 76y are driven by the outputs, the support frame 75 is driven and the outputs of the position detecting elements 78p and 78y change. Becomes

Here, when the driving direction (polarity) of the coils 76p and 76y is set so as to decrease the output of the position detecting elements 78p and 78y (negative feedback), the coils 76p and 76y are turned off.
The support frame 75 is stabilized at a position where the outputs of the position detecting elements 78p and 78y become substantially zero by the driving force of 6y.

A method of performing driving by negatively feeding back the position detection output is called a position control method. For example, when a target value (for example, a shake angle signal) is externally mixed with the ICs 731p and 731y, the support frame 75 moves to the target position. It is driven very faithfully according to the value.

Actually, the differential amplifiers 731cp and 731c
The output of y is sent to a main board (not shown) via a flexible board 716, where analog / digital conversion (A / D conversion) is performed and taken into a microcomputer.

In the microcomputer, the signal is appropriately compared and amplified with a target value (camera shake angle signal), compensated for a phase advance by a known digital filter technique (to make position control more stable), and then passed through the flexible board 716 again. IC7
32 (for driving the coils 76p and 76y). IC
732 indicates the coils 76p and 76 based on the input signal.
y is driven by a known PWM (pulse width modulation) to drive the support frame 75.

As described above, the support frame 75 has the arrow 713p,
713y can be slid, and the position is stabilized by the above-described position control method. However, in a consumer optical device such as a camera, the support frame 75 is always controlled from the viewpoint of preventing power consumption. I can't keep it.

Further, since the support frame 75 can freely move around in a plane perpendicular to the optical axis in the non-control state, measures against noise and damage due to collision at the stroke end at that time are taken. It is necessary to keep.

As shown in FIGS. 34 and 36, three radially projecting projections 75f are provided on the back surface of the support frame 75, and the tips of the projections 75f are formed on the inner periphery of the lock ring 719 as shown in FIG. It is fitted to the surface 719g. Therefore, the support frame 75 is restrained in all directions with respect to the main plate 71.

FIGS. 36A and 36B show the lock ring 71.
9 is a plan view showing the relationship between the operation of the support frame 9 and the support frame 75, and FIG.
FIG. 4 is a diagram in which only essential parts are extracted from the plan view of FIG. Note that the layout is slightly changed from the actual assembled state to make the description easy to understand. Also, the cam portion 719f shown in FIG.
Since the three places are not provided over the entire area of the cylinder of the lock ring 719 in the generatrix direction as shown in FIGS. 29 and 33, they are not actually seen from the direction of FIG. It is shown for the sake of illustration.

As shown in FIG. 29, the coils 720 (72
Reference numeral 0a denotes a lock ring 7 which is a flexible substrate or the like (not shown).
19, which is connected to the terminal 716e on the trunk 716d of the flexible substrate 716 from the terminal 719h through the outer periphery of the terminal 19
The main stranded wire (lead wire) is in a closed magnetic path sandwiched by the permanent magnets 718, and generates a torque for rotating the lock ring 719 around the optical axis by flowing a current through the coil 720.

The driving of the coil 720 is also performed by a microcomputer (not shown) via a flexible substrate 716 on the hard substrate 71.
5 is controlled by a command signal input to the driving IC 733 on the IC 5, and the IC 733 performs PWM driving of the coil 720.

In FIG. 36 (a), the winding direction of the coil 720 is set so that when the coil 720 is energized, a counterclockwise torque is generated in the lock ring 719.
Accordingly, the lock ring 719 rotates counterclockwise against the spring force of the lock spring 728.

The lock ring 719 includes a coil 720
Before power is supplied to the lock rubber 72, the force of the lock spring 728 is used.
6 and stable.

When the lock ring 719 rotates, the armature 724 comes into contact with the suction yoke 729 to contract the armature spring 723, and the positional relationship between the suction yoke 729 and the armature 724 is equalized to lock the lock ring 719.
Stops the rotation as shown in FIG.

FIG. 37 is a timing chart of the lock ring drive.

At the same time as energizing the coil 720 (PWM drive indicated by 720b) by the arrow 719i in FIG. 37, energizing the attracting magnet 730 (730a). Therefore, the armature 724 comes into contact with the suction yoke 729 and, when equalized, the armature 724 is moved to the suction yoke 729.
Is adsorbed.

Next, when the energization of the coil 720 is stopped at the time indicated by 720c in FIG. 37, the lock ring 719 tries to rotate clockwise by the force of the lock spring 728.
Since the armature 724 is adsorbed by the adsorption yoke 729 as described above, the rotation is restricted. At this time, since the protrusion 75f of the support frame 75 is located at a position facing the cam portion 719f (the cam portion 719f rotates), the support frame 75 can be moved by the clearance between the protrusion 75f and the cam portion 719f. become.

As a result, the support frame 75 falls in the direction of the gravity G (see FIG. 36B).
Since the support frame 75 is also in the control state at the time of 19i, it does not fall.

When the support frame 75 is not controlled, the lock ring 71
9, but actually has a play corresponding to the fitting play between the projection 75f and the inner peripheral wall 719g. That is, the support frame 75 has dropped in the direction of gravity G by this play, and the center of the support frame 75 and the center of the main plate 71 are shifted. For this reason, control is performed such that, for example, one second is spent from the time of the arrow 719i to slowly move to the center of the main plate 71 (the center of the optical axis).

This is because if the photographer is suddenly moved to the center, the photographer feels the image shake through the correction lens 74 and is uncomfortable. Even if the exposure is performed during this time, the image deterioration due to the movement of the support frame 75 will not occur. This is to prevent it from occurring. (Eg 1
/ 8 seconds to move the support frame by 5 μm).
The output of the position detecting elements 78p and 78y at the time of the arrow 719i is stored, the control of the support frame 75 is started using the values as the target values, and thereafter, the control is spent for one second to move to the preset target value at the time of the center of the optical axis. (See 75g in FIG. 37).

After the lock ring 719 is rotated (unlocked state), based on the target value from the vibration detecting means (overlapping the above-mentioned center position moving operation of the support frame 75).
The support frame 75 is driven, and the image stabilization starts.

Here, if the image stabilization is turned off at the time of arrow 719j in order to end the image stabilization, the target value from the vibration detecting means will not be input to the correction driving means for driving the correction means.
The support frame 75 stops at the center position. At this time, the power supply to the attraction coil 730 is stopped (730b). Then, the attraction force of the armature 724 by the attraction yoke 729 is lost, and the lock ring 719 becomes a lock spring 728.
, And returns to the state of FIG. At this time, the lock ring 719 is in contact with the lock rubber 726 and its rotation is restricted, so that the collision sound of the lock ring 719 at the end of the rotation can be suppressed small.

Thereafter (for example, after 20 msec), the control to the correction driving means is stopped, and the timing chart of FIG. 37 ends.

FIG. 38 and FIG. 39 are block diagrams showing the outline of the image stabilizing system.

In these figures, reference numeral 91 denotes a vibration detecting means corresponding to the vibration detecting means 83p and 83y in FIG. 37, and a vibration detecting sensor for detecting an angular velocity of a vibration gyro or the like and a DC component of the output of the vibration detecting sensor are cut. And a sensor output calculating means for integrating to obtain an angular displacement.

The angular displacement signal from the vibration detecting means 91 is input to the target value setting means 92. As shown in FIG. 38, the target value setting means 92 comprises a variable differential amplifier 92a and a sample-and-hold circuit 92b. Since the sample-and-hold circuit 92b is always sampling, it is input to the variable differential amplifier 92a. Are always equal and their output is zero. However, when the sample-and-hold circuit 92b enters a hold state with an output from a delay unit 93, which will be described later, the variable differential amplifier 92a starts outputting continuously with the time being zero.

The gain of the variable differential amplifier 92a is made variable by the output of the image stabilizing sensitivity setting means 94. This is because the target value signal of the target value setting means 92 is
0 is the target value (command signal) to follow, but the amount of correction of the image plane with respect to the amount of drive of the correcting means 910 (anti-vibration sensitivity)
This is for compensating for the change in the image stabilization sensitivity due to the change due to the optical characteristics based on the focus change such as zoom and focus.

Therefore, the anti-vibration sensitivity setting means 94 is provided in FIG.
As shown in FIG. 8, zoom focal length information from the zoom information output unit 95 and focus focal length information based on the distance measurement information of the exposure preparation unit 96 are input, and the image stabilization sensitivity is calculated or calculated based on the information. Based on the information, anti-vibration sensitivity information set in advance is extracted, and target value setting means 9 is set.
2, the amplification factor of the variable differential amplifier 92a is changed.

The correction driving means 97 includes ICs 731p, 731y, and 732 mounted on the hard board 715 in FIG.
, And the target value from the target value setting means 92 is input as a command signal.

The correction starting means 98 is a switch for controlling the connection between the IC 732 on the hard board 715 in FIG. 28 and the coils 76p and 76y provided in the correcting means 910.
As shown in FIG. 37, normally, the switch 98a is connected to the terminal 98.
c, the both ends of each of the coils 76p and 76y are short-circuited, and when the signal of the AND means 99 is inputted, the switch 98a is connected to the terminal 98b, and the correcting means 9
10 is in the control state (vibration correction is not yet performed,
6p, 76y, and supplies power to the position detecting elements 78p, 7y.
The correction means 910 is stabilized at a position where the signal of 8y becomes almost zero). At the same time, the logical product means 99
Is also input to the locking means 914, whereby the locking means 914 releases the locking of the correcting means 910.

The correcting means 910 is provided in the position detecting element 7.
The position signal of 8p, 78y is input to the correction driving means 97,
Position control is performed as described above.

When both the SW1 signal due to the half-press of the release means 911 and the output signal of the image stabilization switching means 912 are inputted, the AND gate 99a, the AND gate 99a (see FIG. 38), outputs the signal. Output. That is, as shown in FIG. 38, when the photographer operates the image stabilization switch of the image stabilization switching means 912 and half-presses the release means 911, the correction means 910 is unlocked and enters the control state.

The SW1 signal generated when the release means 911 is half-pressed, as shown in FIG.
, And the photometry, the distance measurement, and the lens focusing drive are performed. The focus information obtained here is input to the image stabilization sensitivity setting unit 94.

The delay means 93 receives the output signal of the AND means 99 and outputs it, for example, one second later, 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 in synchronization with the SW1 signal generated by half-pressing the release means 911. As described above, the sensor output calculation including the large time constant circuit such as the integrator requires a certain period of time from the start until the output is stabilized.

The delay means 93 is connected to the vibration detecting means 91
After waiting for the output to stabilize, it plays the role of outputting the target value signal to the correction means 910, and starts the image stabilization after the output of the vibration detection means 91 is stabilized.

The exposure means 913 performs mirror up by inputting the SW2 signal generated by the release operation of the release means 911, and opens and closes the shutter at the shutter speed obtained based on the photometric value of the exposure preparation means 96 to perform exposure. ,
Mirror down to end shooting.

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

When the output of the AND means 99 is turned off, the locking means 914 locks the correcting means 910, and thereafter, the switch 98a of the correcting starting means 98 is connected to the terminal 98c, and the correcting means 910 is turned off. You lose control.

The vibration detecting means 91 continues to operate for a fixed time (for example, 5 seconds) even after the operation of the release means 911 is stopped by a timer (not shown), and then stops.
This is because the photographer frequently performs the release operation after the release operation is stopped, so that it is possible to prevent the vibration detection unit 91 from being activated every time in such a case, and to shorten the standby 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.

FIG. 40 is a flowchart showing a series of operations when the above operations are processed by the microcomputer, and will be briefly described below.

When the power of the camera is turned on, the microcomputer first checks the state of the anti-shake switch. If the switch is on, then the microcomputer determines whether the SW1 signal is generated by half-pressing the release means 911. (# 5001 → # 5
002). If the SW1 signal has been generated, the internal timer is started (# 5003), then the photometry, the distance measurement, the start of the shake detection, and the release of the lock to enable the anti-shake control by the correction means 910 are performed. Is performed (# 5004).

Next, it is checked whether or not the content of the time counted by the timer has reached a predetermined time t1, and if not, the process remains at this step until it reaches (# 5005). This is a process for waiting for a time until the sensor output is stabilized as described above. Thereafter, when a predetermined time t1 elapses,
The correcting unit 910 is driven based on the target value signal to start the image stabilization control (# 5006).

Next, it is checked whether or not the SW2 signal is generated by the release of the release means 911 (# 500).
7) If it is not generated, it is determined again whether the SW1 signal is generated, and if the SW1 signal is not generated (NO in # 5008), the image stabilization control is stopped and the correction means 910 is set. At a predetermined position (# 501
1 → # 5012).

Although no SW2 signal is generated,
If the W1 signal has been generated, step # 5007 → # 5
008 → # 5007... Are repeated. In this state, when the push-off operation of the release means 911 is performed and the SW2 signal is generated (YES in # 5007), the film is exposed (# 5009). Then, the state of the SW1 signal is checked (# 5010). When the SW1 signal is no longer generated, the image stabilization control is stopped, and the correcting means 910 is locked at a predetermined position (# 5011 → # 5012).

When the above operation is completed, the timer is reset once and restarted (# 5013).
It is determined again whether the SW1 signal is generated within a predetermined time (here, within 5 seconds) (# 5014 → # 5015).
→ # 5014 ...). If the SW1 signal is generated again within 5 seconds after stopping the image stabilization (YE in # 5015)
S), the photometry, the distance measurement operation, and the unlocking of the correcting means 910 are performed (# 5016). Since the shake detection is continued as it is, the drive control of the correcting means 910 is immediately performed based on the target value signal (# 50). 5006) Then, the same operation as described above is repeated.

That is, by performing such processing,
As described above, when the photographer stops the release operation and subsequently performs the release operation, the vibration detecting means 9 is used each time.
This makes it possible to eliminate the inconvenience of starting the device 1 and waiting for its output to stabilize.

On the other hand, within 5 seconds after stopping the image stabilization,
When one signal is not generated (YE of # 5014)
S), the shake detection is stopped (the drive of the vibration detecting means 91 is stopped) (# 5017). After that, step # 5001
To return to the state of waiting for the anti-vibration switch to turn on.

[0106]

The above-described shake correcting apparatus for a vibration isolating system includes a support shaft 71 as shown in FIG.
1, the rotation (rolling) of the support frame 75 around the optical axis (the direction orthogonal to the arrows 713p and 713y) is suppressed. However, in order to improve the slidability of the support shaft 711, there is a fitting play between the support shaft 711 and the bearings 71d and 75d, which causes rolling play. In this case, there is a problem that the shake correction driving accuracy is deteriorated by the amount.

(Purpose of the Invention) A first object of the present invention is to provide a shake correction device capable of reducing the rolling play of the support frame and increasing the accuracy of the shake correction drive.

A second object of the present invention is to provide a shake correction device which can reduce the rolling play of the support frame and increase the accuracy of the shake correction drive while achieving the miniaturization of the device. .

[0109]

In order to achieve the first and second objects, the present invention according to the first and second aspects of the present invention comprises a correcting means for correcting a shake and a plurality of fitting means for connecting the correcting means. Support means for restricting only in a first direction by a portion, and a plurality of radial axes extending radially from a correction center of the correction means on the plane orthogonal to the first direction toward the plurality of fitting portions. And a resilient means for elastically connecting the correcting means and the supporting means along the plurality of radiation axes, wherein the resilient means is provided near a peripheral end of the correcting means and a peripheral end of the supporting means. The tension spring is used to connect the vicinity, and the correction means is pulled in an eight-split manner by the tension spring, so that the first
(Play around the optical axis) is elastically absorbed, and the tension spring is provided in the same phase as the plurality of radiation axes when viewed from the front of the correcting means.

Further, in order to achieve the first object,
According to a third aspect of the present invention, there is provided a correction means for correcting a shake,
A vibration correcting device comprising: a supporting unit that supports the correcting unit; and a tension spring that elastically connects a peripheral end of the correcting unit and a peripheral end of the supporting unit, wherein the tension spring is Through the correction center of the correction means, provided along the correction direction of the correction means, by pulling the correction means in a plurality of directions, to position the correction means substantially at the correction center,
By arranging a plurality of tension springs only along the shake correction direction of the correction means, the spring constant at the time of shake correction is made constant.

In order to achieve the first object,
According to a fourth aspect of the present invention, there is provided a correcting means for correcting a shake, a supporting means for restricting and supporting the correcting means only in a first direction, and a rotation of the correcting means around the first direction. And a biasing means for biasing the correction means around the first direction, and means for elastically connecting the biasing means to the correction means and the support means, A tension spring for elastically connecting the peripheral end of the correction means and the peripheral end of the support means, provided in an array in which the spring force of the tension spring generates a rotational force of the correction means around a first direction; Structure.

More specifically, the tension spring is helically arranged when viewed from the front of the correction means, and the spring force generates a rotation force about the optical axis of the correction means. Is precharged.

[0113]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIGS. 1 to 10 are views showing details of components of a shake correcting apparatus according to a first embodiment of the present invention, and FIG. 1 is a view showing a shake correcting apparatus according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view showing components of the main part of FIG. 1. FIG. 2 is a view seen from the left side of FIG. 1 (for explanation, the hard board 111 corresponding to the hard board 715 is removed so that the inside can be seen. FIG. 3A is a diagram viewed from the direction of arrow A in FIG. 2, FIG. 3B is a diagram showing a configuration of a portion related to position detection of the correction lens 11, and FIG. 5 is a cross-sectional view, FIG. 5 is a diagram showing a plane, a side surface, and a cross-section of the coil unit. FIG. 6 is a diagram for explaining a configuration of a portion related to a means for driving the correction lens 11 in comparison with a conventional example. FIG. 8 shows the hard substrate 111 also shown in FIG. 1, and FIG. 8 shows the support frame 112 also shown in FIG. FIG. 9 is a view showing the lock ring 113 and the rolling restricting ring 112 also shown in FIG. 1 as viewed from the surface of FIG. 2, and FIG. It is a figure for explaining a lock mechanism.

First, the configuration of the shake correction device will be briefly described with reference to FIG.

The correction lens 11 is supported by a support frame 12,
The support frame 12 is connected to the main plate 13. Then, the correcting means including the correcting lens 11 and the support frame 12 is driven in the pitch direction 114p and the yaw direction 114y by a driving means including a permanent magnet, a coil, and the like, which will be described later, and the image blur is corrected. Reference numeral 113 denotes a lock ring, which locks (locks) the support frame 12, that is, the correction means, at a predetermined position by transmitting an output of a step motor described later to the rack 113a. 112 is a rolling regulating member, by fitting the support frame 12 via the three shaft portions 112a ₁ ~112a ₃ the base plate 13, decided to regulate the rolling of the optical axis of the support frame 12 Become. Reference numeral 111 denotes a hard board (printed board) on which various terminals such as a step motor and a coil described above and a hall element, which will be described later, forming a position detecting means are collectively wired on the same plane.

Hereinafter, the detailed configuration will be described with reference to FIGS.

Reference numeral 12 denotes a support frame (see FIGS. 2 and 8) for supporting the correction lens 11 corresponding to the support frame 75 in FIG. 28. The support frame 12 includes permanent magnets 14p and 14y (in FIG. 2, the yokes 15p and 15p). The yoke 15p, 15y to which the (visible and hidden by 15y) is adsorbed is fixed by caulking or screwing.

In general, it is difficult to complicate the shape of the permanent magnet, and therefore, when attaching the permanent magnet to the support frame 12, an operation such as bonding is required. However, there is a problem that the bonding operation is difficult to control and has low reliability.

Therefore, in this embodiment, caulking holes and screw holes are provided in the yokes 15p and 15y whose shapes can be arbitrarily determined (they are not visible because they are the rear surfaces in FIG. 2), and the yokes 15p and 15y are mounted on the support frame 12. Fix the yokes 15p, 15
The permanent magnets 14p and 14y are attracted to the
(See (b)) Fixing method (see FIG. 4 (b))
The bonding process is omitted, improving reliability.

Reference numeral 13 denotes a base plate corresponding to the base plate 71 in FIG. 28, and coils 16p and 16y are attached to the surface of the base plate 13 facing the permanent magnets 14p and 14y (FIG. 4).
(B)). This coil 16p (same for 16y)
As shown in FIG. 5, the coil 1 is formed integrally with a coil frame 16a made of a resin material (ABS), and a terminal pin (stud pin) 16b which is a conductive member pressed into the coil frame 16a.
Both terminals of 6p are connected to form a unit. still,
FIG. 5A is a plan view of the coil unit 16, and FIG.
5 is a side view, and FIG. 5C is a cross-sectional view taken along the line CC ′ of FIG. 5B.

Generally, when attaching a coil to a member,
First, it is necessary to glue the coil to the member, then solder both terminals of the coil to the connection part, and then collect the lead wires of both terminals. In the main work process of
It is not preferable because the time for the main work becomes longer. Also, replacement of a defective coil is troublesome. Even when the coil terminals are soldered, the lead wires are soft, so it is necessary to pinch them with tweezers or the like and solder them, and it is not preferable that the lead wires be similarly assembled in the main work process.

In the present embodiment, the coils are unitized and the positioning pins 16 provided on the coil frame 16a are provided.
The structure of attaching the coil 16p (16y) to the main plate 13 with the c and the claw 16d greatly reduces the working process.

The lead wires are also connected to the strong terminal pins 16b, and are penetrated and soldered to a hard board 111 described later. Therefore, the electrical connection of the coil terminals can be performed very well and reliably.

The yokes 15p and 15y, the permanent magnets 14p and
The relationship between 14y and coils 16p and 16y will be described with reference to FIG. FIG. 6A shows the first embodiment, FIG. 6B shows an inappropriate example, and FIG.
Shows a conventional example.

In the conventional example shown in FIG.
6p and 76y were attached to the support frame 75. The permanent magnet 73 forms a closed magnetic path indicated by a broken line 73b by the first yoke 712 and the second yoke 72 as shown. The reason why the closed magnetic path is formed in this way is that the flow of the magnetic flux is thereby adjusted and the driving efficiency is improved.

In the present embodiment, when the permanent magnet 14p (14y) is attached to the support frame 12, in order to form a closed magnetic path, as shown in FIG. , 14y and opposing yokes 15ap, 15ay may be provided at positions facing them. This allows
A closed magnetic path 14a is formed.

However, in the first embodiment, the drive efficiency is improved by providing the opposed yokes 15ap, 15ay, and similarly, the opposed yokes 15ap, 1ay are provided.
As shown in FIG. 6A, from the viewpoint of the balance of the deterioration of the followability caused by the weight increase by attaching the 5ay,
An open magnetic path is used without providing an opposing yoke. That is, the configuration focuses on the fact that the absolute value of power consumption can be reduced by not increasing the weight, rather than improving the driving efficiency.

As described above, the yoke 15p (15y)
In addition, the permanent magnet 1 attached to the support frame 12
Although the mounting of the 4p (14y) is simplified, the magnetic flux 14a flows through the yoke 15p (15y) as shown in FIG. 6A, thereby having a function of preventing the magnetic flux density from lowering. . As the thickness of the permanent magnet 14p (14y) is larger, the magnetic flux density to the opposing coil 16p (16y) can be increased. Even if the permanent magnet 14p (14y) is not thick, the same applies if the total thickness when the yoke 15p (15y) is attached is not thick.

Therefore, in the present embodiment, the yoke 15p (15y) is effectively used even when the open magnetic circuit is used, and
Along with simplifying the collection of the permanent magnets 14p (14y), the magnetic flux density can be increased even with the thin permanent magnets 14p (14y).
The cost of the permanent magnet 14p (14y) is reduced.

As shown in FIGS. 2 and 8, arms 12a extend radially in three directions on the support frame 12, and rollers 17 are screwed to the arms 12a. The guide groove 13a of the base plate 13 (see FIGS. 1 and 3)
(See (a)). The guide groove 13a is shown in FIG.
Since each of the rollers 17 has a long hole extending in the direction of the arrow 13b, the three rollers 17 can move in this direction. That is,
The support frame 12 is freely slidable in all directions in a plane including the base plate 13 (position is restricted only in the optical axis direction 13c in FIG. 3A).

At the time of assembly, the arm 12a of the support frame 12
The roller 17 is screwed into one or two of the three places, and the screw 17 is screwed into the guide groove 13 of the base plate 13.
a, and the support frame 12 is placed on the main plate 13. Finally, the remaining rollers 17 are screwed to the arm portions 12 a of the support frame 12 through the remaining guide grooves 13 a, so that the support frame 12 can be easily attached to the main plate 13. The mounting of the support frame 12 is completed.

In the optical axis direction 1 of the roller 17 and the guide groove 13a
For the fitting play 3c, for example, it is necessary to secure “40 μm” in anticipation of the temperature fluctuation “20 μm” and the dimensional tolerance fluctuation “20 μm”, and the inclination of the correction lens 11 becomes loose correspondingly. However, the three guide grooves 13a are
3, the span of each other is long,
Therefore, the tilt play of the support frame 12 with respect to the base plate 13 due to the fitting play is kept within the optical tolerance.

As described above, the support of the support frame 12 by the rollers 17 and the guide grooves 13a greatly improves the assembling workability as compared with the holding support method used in FIG. Then, the support balls 79a, 79b and the first yoke 712,
Although the friction between the second yokes 72 has degraded the driving accuracy, in this embodiment, the driving friction can be suppressed to a small value because the charge is not supported.

Here, the inclination of the correction lens 11 can be adjusted by changing the above-mentioned rollers 17 into eccentric rollers as shown in FIG. 4 (a) (FIG. 4 (a) ) Is an enlarged view of a portion). That is, by rotating the roller 17, the arm 12 a moves back and forth in the optical axis direction. Therefore, by adjusting the position of the three arms 12 a in the optical axis direction by the roller 17, the inclination of the correction lens 11 is adjusted. The roller 17 can be made unrotatable with the arm 12a by tightening the screw 17a after the adjustment.

By making the roller 17 an eccentric roller in this way,
Special tilt adjusting means can be eliminated, and the entire apparatus can be made compact.

The bottom plate 13 is provided on the bottom plate 13 in FIG.
A lock ring 113 shown in (a-1) and (a-2) is rotatably supported, and a pinion (not shown) which is an output shaft of a step motor 19 (see FIG. 2) also attached to the base plate 13. Engages with the rack 113a to drive the lock ring 113 in the rotational direction. The four cams 113b provided on the lock ring 113 are shown in FIG.
The support frame 12 is locked and unlocked in relation to the four-point protrusion 12b shown in FIG.

That is, when the lock ring 113 shown in FIG. 9A is rotated counterclockwise, the cam portion 113b of the lock ring 113 separates from the projection 12b of the support frame 12, so that the support frame 12 is locked. When the lock ring 113 is rotated clockwise, the flat portion 113c of the cam portion 113b comes into contact with the protrusion 12b, and the support frame 12 and the lock ring 113 are engaged. That is, the support frame 12 is locked to the main plate 13.

Therefore, when performing the shake correction, the lock ring 113 is driven counterclockwise by the step motor 19 to make the support frame 12 free from the lock ring 113. The support frame 12 is driven to rotate clockwise to
Is locked.

In the prior art, three projections are used as shown in FIG. 36. In this embodiment, four projections are used as shown in FIG. This is to reduce the amount of gravitational direction applied when capturing the backlash fitting between the lock ring 113 and the support frame 12 when the support frame 12 is locked. This will be described with reference to FIGS.

FIG. 10 (a-1) is a schematic view of a conventional three-point projection support frame 75 and lock ring 719, and FIG.
1) is a schematic diagram of a support frame 12 and a lock ring 113 of a four-point projection according to the present embodiment.

In both cases, it is assumed that the radial gap (fitting play) from the tips of the projections 75f, 12b to the lock ring inner peripheral walls 719g, 113g is "0.2 mm" (FIG. 10 (a-
2) and (b-2)). The direction of gravity applied to the support frames 75 and 12 during photographing is the same as the pitch direction 114p (hereinafter also referred to as the 114 direction).

In the case of FIG. 10A-2, the direction of gravity (11
The play in the 4p direction) is “0.39 mm” from the figure. Since the projections 75f ₁ is extending along the direction of gravity, "0.2mm"
It is. Therefore, the play in the 114p direction is “a total of 0.59 mm”. From the figure, the play in the horizontal direction (114y direction) is "± 0.23 mm". 114p or 114 when shooting
It is common to hold the camera with the y direction as the direction of gravity. At this time, if the play is “0.59 mm”, the supporting frame 75
Deviates from the center of the optical axis (due to the influence of gravity). For example,
When shooting with the 114p direction as the direction of gravity, the projection 7
5f ₁ is in contact with the lock ring in the peripheral wall 719g, is in the upward direction is made a gap of "0.59mm".

It is assumed that the optical adjustment has been performed at the time of shipment so that the optical performance is the best in such a state. When the camera is repositioned and the direction of gravity is set to 114y, the horizontal direction (11
(4p direction), since no gravity is applied, the support frame 75 is set to “0.
Since the camera can be positioned at any position in the horizontal direction with a play of "59 mm", there may be cases where the optical balance is greatly lost.

In the case of the present embodiment, as can be seen from FIG. 10 (b-2), the play is caused by the gravity direction 114p and the horizontal direction 114p.
Both y reach the range of “± 0.2 mm”. That is, the four-point protrusion can reduce the maximum amount of play to 2/3 as compared with the three-point protrusion. Of course, even in the case of a four-point projection, if the direction of 45 degrees is set to the direction of gravity, the amount of play increases by √ (2) times. However, since such imaging is rare, it is considered that there is practically no problem.

To summarize the superiority of the four-point projection over the three-point projection, each of the projections (the projections 12b ₁ and 12b ₃
The direction 14p, 12b ₂ and 12b ₄ are arranged along the direction 114y) is the direction in which gravity is applied to the photographer (114p or 1).
14y), the play at the time of locking is the same for each projection. However, in the case of a three-point projection, the projection that does not follow the direction of gravity at the time of photographing has the minimum play at the gravity direction. (Radial direction, 0.2 mm in FIG. 10A-2).

If there is no gap between the lock ring 113 and the support frame 12, there is a possibility that the lock ring 113 will not rotate properly due to friction between the support frame 12 and the gap therebetween. Slightly provided. At this time, in the case of a three-point projection, the backlash in the gravitational direction and the horizontal direction at the time of photographing is larger than the set backlash. Thus, the play in the gravitational direction and the horizontal direction at the time of shooting can be made the same as the set play.

As described above, the support frame 12 is connected to the base plate 13 by the rollers 17 and the guide grooves 13a, and the position thereof is regulated in the optical axis direction. This support method is excellent in assemblability, and
The guide groove 13a is formed integrally with the
It is easy to manage the fitting between the hole 7 and the hole of the guide groove 13a (in general, it is easy to understand in consideration of the relationship between the roller and the cam, which are often used in the lens barrel). Further, by making the roller 17 a known eccentric roller, there is an advantage that the inclination between the support frame 12 and the base plate 13 can be adjusted by the rotation of the roller 17.

However, in the case of the above-described supporting method, the supporting frame 12 is moved in the pitch direction 114p and the yaw direction 1 shown in FIG.
In addition to being able to freely move in the direction 14y (shake correction direction), it also rotates in the rolling direction 114r. This rotation deteriorates the shake correction accuracy.

Therefore, in the present embodiment, the following three methods are employed to reduce the influence of the rolling.

1) Rolling is gradually expanded when the center axis of the thrust by the coil and the center axis in the direction of detecting the position of the support frame are shifted. In the conventional example of FIG. 28, for example, the thrust center of the coil 76p is on the axis 713p coinciding with the center of gravity of the correction lens 74, but the center axis in the position detection direction is 78.
ap, and both directions are aligned, but the axial position is shifted. Therefore, the support frame 75 is 713p by the thrust of the coil.
If the rolling occurs when moving in the direction, a phase shift occurs between the movement of the support frame 75 on the shaft 78ap and the movement of the support frame 12 on the shaft 713, and the control cannot be performed well. (In the conventional example, the support shaft 711 is provided for the countermeasure.
No countermeasures have been taken against minute rolling caused by looseness between the support shaft 711 and the support frame 75.) In this embodiment, for example, the Hall element
By making the sensitivity axes of 10p and 110y coincide with the thrust center axes of the coils 16p and 16y (114p and 114y),
The above measures have been taken.

2) FIG. 8 (b) is a view of only the base plate 13 of FIG. 2 viewed from the back, and an elongated hole 13d extending in the 114y direction.
₁ , 13d ₂ and 13d ₃ are provided. This long hole 1
3d ₁ , 13d ₂ , and 13d ₃ are shown in FIGS.
Shaft portions 112a ₁ , 112a ₂ , 112a ₃ extending from the rolling regulating ring 112 shown in -2) in the direction opposite to the paper surface.
Penetrate each. The shaft portion 112a ₁ and the long hole 13d ₁ ,
Axis 112a ₃ and elongated hole 13d ₃ is in each fitting relationship, the rolling regulating ring 112 from the two points is only movable in the direction 114y to the base plate 13.

[0153] The elongated hole 13d ₂ is elongated holes 13d _1, 13d
₃ is larger than the (but are drawn in substantially the same manner as in the drawing), and increase the fitting backlash between the shaft 112a _2. This is because the three shaft portions 112a ₁ , 112a ₂ , 11
2a ₃ and to become a duplicate fit to the fitting also is because the movement between the rolling regulating ring 112 and base plate 13 is astringent. That is, it is preferable to open one of the three long holes widely.

[0154] Now, given on the basis of the long hole 13d _1, 11
4y direction of span is longer than the elongated hole 13d ₂ of the elongated hole 13d _3. Therefore, when the fitting hole of the elongated holes 13d ₁ and slots 13d _3, the rolling regulating ring even when fitting play of the shaft portion 112a _1, 112a ₃ occurs 112 and the ground plane 13
Rolling play between them can be reduced. (Slot 13d
If the ₁ and slots 13d ₂ and the fitting hole, because the span of both direction 114y is short, rolling play becomes larger) nail rolling regulating ring 112 is provided at the main plate 13 1
At 3k (see FIGS. 4B and 8B), patching is restricted in the optical axis direction. Shaft 11 of the rolling restriction ring
2a ₁ , 112a ₂ , 112a ₃ penetrate through the base plate 13 and enter elongated holes 12c ₁ , 12c ₂ , 12c ₃ provided on the back surface of the support frame 12 and extending in the 114p direction (the back view of the support frame in FIG. 8A). And FIG. 4 (b)). Here too long hole 12c
₁ and the shaft portions 112a ₁ , 12c ₂ and the shaft portion 112a ₂ are set in a fitting relationship, and the long hole 12c ₃ is set large to avoid overlapping fitting. Reason for wide open elongated hole 12c ₃ when this is the same as in the case of the long hole 13d. Therefore, the support frame 12 can move only in the 114p direction with respect to the rolling restriction ring 112.

With the above configuration, the support frame 12 can move only in the directions 114p and 114y with respect to the base plate 13, and is restricted in the rolling direction 114r.

The method of restricting the rolling of the correcting means (composed of the support frame 12 and the correcting lens 11) has the following merits as compared with the conventional example.

The support shaft 711 for controlling rolling in the conventional example shown in FIG. 28 is provided on the same plane as the support frame 75. Rolling restriction ring 11 in this embodiment
As shown in FIG. 4B, reference numeral 2 is provided on the opposite surface of the support frame 12 (correction means) with the ground plate 13 (support means) interposed therebetween. For this reason, the step motor 19 can be arranged in an empty space where the support shaft 711 is located (see FIG. 2). Since the rolling restriction ring 112 is thin,
The size does not increase even if it is provided on the back surface of. (If the step motor 19 is provided on the back surface of the base plate 13 because of its thickness, the whole vibration compensation device becomes large.) In addition, the step motor 19 is arranged on the same plane as the coils 16p and 16y. And all the terminals of the coils 16p and 16y can be directed in the same direction, which leads to an improvement in assemblability described later.

3) As described above, the rolling restriction ring 11
Although the rolling of the support frame 12 is restricted by the action of 2, the slight rolling due to the looseness of the fit between the shaft portion 112a and the elongated holes 13d and 12b still remains.

In FIG. 2, the arms 12a on the support frame 12
A spring 18 is provided between a hook 12d provided on the base plate 13 and a hook 13e provided around the base plate 13 (see FIGS. 2 and 4).

As shown in FIG. 2, the springs 18 extend radially from the center of the support frame 12 in three directions, and pull the support frame 12 in an eight-split state. Hook 12d
Is provided at a position far apart in the radial direction from the center of the support frame 12, so that when a force in the rolling direction acts on the support frame 12, the force can be suppressed by the elastic force of the spring arranged in the eight-split direction. I can do it. That is, since the rolling is elastically regulated, it is possible to prevent a slight rolling backlash.

By the above-described operations 1) to 3), the shake correcting apparatus according to the present embodiment can significantly reduce the influence of rolling.

The terminal pins 16b of the coil unitized as described above extend upward in FIG.
Also, a terminal pin 19a of a drive coil of the step motor 19 is provided.
Also extend in this direction.

FIG. 7 shows a hard substrate 111 provided in the vibration assist device according to the present embodiment.
Hall elements 110p and 110y (only the positional relationship is shown in FIG. 2), which are position detecting means to be described later, are reflow-connected to the back surfaces of the cp and 111cy.
Although an example using a Hall element as the position detecting means is shown, any magnetic detecting means such as an MR element may be used.
Further, an optical detecting means such as a photo reflector may be used.

The hard substrate 111 is mounted on the base plate 13 using the positioning pins 13f of the base plate 13 and the holes 111d of the hard substrate 111 as guides, and screws are passed through the holes 111e and screwed into the screw holes 13g. At this time, the terminal pins 16b and 19a naturally penetrate the holes 111b and 111a, respectively. The holes 111a and 111b are through holes, and are electrically connected to the terminal pins 16p and 19a by soldering.

As described above, positioning for soldering (for example, soldering while holding and holding a lead wire on a terminal with tweezers) is unnecessary, and the directions of soldering are all on one plane. The workability is extremely good and the reliability is high.

As the position detecting means attached to the hard substrate 111, as described above, the Hall elements 110p, 11
0y is used (see FIG. 3B and FIG. 6B).

Hereinafter, the operation will be described with reference to FIG.

The Hall element 110p (110y) changes its output in response to a change in the surrounding magnetic field. In FIG. 6B, the Hall element 110p (110y) faces the bipolar magnetized permanent magnet 14p (14y), and the support frame 1
Since the relationship between the Hall element 110p (110y) and the permanent magnet 14p (14y) shifts with the drive of the second element (for example, in the 114p direction), the Hall element 110p (110y)
The magnetic field intensity applied to the Hall element 110p (1
10y) detects the position of the support frame 12 by performing output corresponding thereto.

The position of the Hall element 110p (110y) can be detected only by facing the permanent magnet 14p (14y) as described above.
There is a merit that the work is easier than performing the electrical connection work to 77y (work to solder to the arm portions 716bp and 716by of the flexible substrate 716). However, it has the following disadvantages.

First, the magnetic field strength of the permanent magnet 14p (14y) greatly changes with temperature, and
The sensitivity of (110y) has a large temperature dependency. Second, the magnetic field generated by the coil 16p (16y) is
0p (110y), the actual permanent magnet 1
4p (14y) movement and change in magnetic field
A magnetic field change due to 6p (16y) is also detected, and a detection error increases.

In the present embodiment, the following two points solve the problem peculiar to the Hall element.

1) A yoke 15p (15y) is provided between the Hall element 110p (110y) and the permanent magnet 14p (14y).
y). By providing the yoke in this way, the magnetic flux of the permanent magnet 14p (14y) is almost
Although it flows into p (15y), the leakage flux is still applied to the Hall element 110p (110y).

When the permanent magnets 14p (14y) are adjacently magnetized with opposite polarities, the change in the magnetic field at the boundary is sharp, but the range of change is narrow, and the Hall element 110p (110y)
If y) is provided near the permanent magnet 14p (14y), the detection stroke cannot be increased. (If the Hall element 110p (110y) is separated from the permanent magnet 14p (14y), the stroke increases but the size of the device increases). When the yoke 15p (15y) is provided, the Hall element 110p
This is equivalent to disposing the (110y) away from the permanent magnet 14p (14y), and the detection stroke can be expanded while the device is compact.

By using a well-known magnetic shunt alloy or soft ferrite whose magnetic resistance changes with temperature as the yoke 15p (15y), the temperature change of the leakage magnetic flux can be reduced, and the Hall element 110p (110y) can be used.
The temperature change of the sensitivity y) can be reduced. Hall element 11
Since the temperature change of 0p (110y) is linear and there is little difference between individuals, the output can be electrically corrected by using a temperature-sensitive element in addition to the above measures, and the influence of the temperature can be reduced.

2) As shown in FIG. 6A, in this configuration, the coil 16p (16y) and the Hall element 110p (110
Between y), a permanent magnet 14p (14y) and a yoke 15 are provided.

Generally, since the Hall element is provided on the same side as the coil, the Hall element also detects the magnetic field fluctuation due to the coil. However, in the case of this configuration, the coil 16p (16
The magnetic field fluctuation of y) is a permanent magnet 14 having a stronger magnetic field.
Since it is blocked by p (14y) and the yoke 15, it does not reach the Hall element 110p (110y). Therefore, according to this configuration, the influence of the magnetic field change due to the driving current of the coil 16p (16y) does not affect the output of the Hall element 110p (110y), and accurate position detection can be performed.

The following is a summary of a specific assembling method of the above-described shake correcting apparatus. (A) A pair of unitized coils 16p on the base plate 13,
16y is patched. (B) The correction lens 11 is fitted and the permanent magnet 14p
The support frame 12 to which the yoke 15p (15y) adsorbed by (14y) is screwed is placed on the base plate 13, and the rollers 17 are screwed to the support frame 12 through the guide grooves 13a. Join. (C) The step motor 19 is screwed to the main plate 13. (D) Hang the spring 18 between the hooks 12c and 13e. (E) Hard substrate 111 (Hall element 110p, 110
(y is already provided) is screwed to the main plate 13. (F) The terminal pins 16p and 19a are soldered to the hard substrate 111. (G) Put the lock ring 113 on the back surface of the main plate 13 and patch-fix the rolling restriction ring 112 to the claw 13h (the lock ring 113 is the rolling restriction ring 112).
At the same time, it is regulated in the optical axis direction by the claw 13h).

It is possible to assemble the shake correction apparatus only by the simple assembling process described above, so that the productivity is good and
A highly reliable device can be obtained.

The features of the present embodiment are summarized below. (1) The permanent magnets 14p and 14y are supported by the support frame (movable side) 12
By eliminating the need for wiring to the movable side, assembly reliability has been improved. (2) By using the open magnetic circuit for the permanent magnets 14p and 14y, high-speed responsiveness of shake correction can be maintained. (3) A yoke 15p (15
By providing y), a strong magnetic field was realized by the thin permanent magnets 14p and 14y, and the cost of the permanent magnets could be reduced. (4) The permanent magnets 14p and 14y are connected to the yoke 15p (15
y), and the yoke 15p (15y) is
2, it is troublesome permanent magnet 14p, 14
The adhesion of y could be omitted. (5) Since the coils 16p and 16y are unitized (insert molding integrally with the coil frame and the terminal pin), the coils 16p and 16y are easily mounted on the ground plate 13 and can be securely mounted on the ground plate 13. (6) Since the support between the base plate 13 and the support frame 12 is provided by the rollers 17 and the guide grooves 13a, assembly is easy and mounting accuracy can be increased. (7) By making the roller 17 an eccentric roller, the inclination of the correction lens 11 can be adjusted without providing any special inclination adjusting means. (8) The fitting play between the lock ring 113 and the support frame 12 is set at four points along the direction of gravity at the time of photographing, so that the fitting play can be reduced. (9) Hall elements 110p and 110 serving as position detecting means
Since the sensitivity axis of y and the central axis of the thrust of the coils 16p and 16y were made coincident, the position detection error due to rolling could be reduced. (10) Rolling can be controlled with a simple configuration by the rolling control ring 112. (11) The rolling play could be elastically absorbed by hanging the tension spring 18 on a hook in the radial direction and away from the center and pulling the support frame 12. (12) Hall elements 110p and 11 as position detecting means
By using 0y, complicated steps such as mounting and wiring of the IRED could be omitted. (13) Hall elements 110p and 110y are connected to yoke 15p
By facing the permanent magnets 14p and 14y via (15y), the detection stroke can be increased even if the gap between them is narrow, and the device can be made compact. (14) By using a magnetic shunt alloy as the yoke 15p (15y), a change in sensitivity temperature of the Hall elements 110p and 110y can be reduced. (15) The Hall elements 110p and 110y are
By providing the permanent magnets 14p and 14y on the opposite surfaces with respect to p and 16y, the influence of the magnetic field fluctuation due to the coil was eliminated, and the position detection accuracy was improved. (16) By arranging the rolling restriction ring 112 on the back surface of the main plate 13, the stepping motor 19 for driving the rolling can be installed on the support frame 12 side of the main plate 13, so that the entire apparatus is made compact. (17) Since the coils 16p, 16y and the step motor 19 are aligned on the same surface and the respective terminal pins are provided in the same direction, the soldering work when assembling the board is facilitated.

(Second Embodiment) FIGS. 11 to 18 are diagrams relating to a shake correction apparatus according to a second embodiment of the present invention. For ease of explanation, FIG. FIG. 1 schematically shows the first embodiment, and FIG. 2B shows the second embodiment.
As an embodiment, the outline of only the changed elements from the first embodiment is shown.

Note that the image stabilizing apparatus provided with the changing elements shown in each of the drawings (b) described below is the second embodiment as described above, but this is for convenience of explanation, and is at least one. A device provided with one or more changing elements is considered as a shake correction device according to the second embodiment. (In the actual description, for example, while an example in which the configuration of the permanent magnet is changed as a changing element is referred to as a second embodiment, a permanent magnet appears in describing another changing element as the second embodiment. In this case, the description is made with the configuration before the change, that is, the configuration including the permanent magnet according to the first embodiment.) FIG. 11A illustrates the support frame 1 according to the first embodiment.
2 (correction means), a portion related to the configuration of the drive means, that is, the permanent magnet 14p (14y) and the coil 16p
FIG. 11B is a diagram showing the relationship (16y), and FIG. 11B is a diagram showing a relationship between the permanent magnet 31p (31
It is a figure which shows the relationship between y) and coil 16p (16y).

In the second embodiment, FIG.
As shown in (b), the magnetization direction of the permanent magnet 31p (31y) attached to the support frame 12 and the coil 32p (31y)
The direction 114p (114y) of the winding center of y) is orthogonal to the direction 13c of the first embodiment (see FIG. 11A). In such a configuration, by controlling the direction and amount of current to the coil 32p, the permanent magnet 31p (31
y) is sucked or repelled into the core, and the support frame 1
2 is driven.

In the case of such a method, since an empty space is formed in a portion indicated by an arrow D in FIG. 11B, the above-described spring 18 can be provided here, and the roller 17 fitted into the guide groove can be provided here. This eliminates the need for special space for springs and rollers, making it compact.

FIG. 12A is a side view showing the coil unit according to the first embodiment, and FIG.
1) and (b-2) are a side view and a back view showing a coil unit according to a second embodiment of the present invention.

In the second embodiment, the coil 16p (16y) is formed by integrally molding the coil 16p (16y) with the coil frame 16a as in the first embodiment shown in FIG. As shown in FIGS. 11 (b-1) and 11 (b-2), for example, a coil 16p is attached to a bobbin 33a made of ABS.
(16y) Created by winding p. In this method, a coil is formed simply by winding a wire around the bobbin 33a.
As compared with the case where the coil is wound with another tool, baked and adhered, and then integrally formed with the coil frame 16a as shown in FIG. There are benefits.

The bobbin 33a is provided with a pair of terminal pins 16b in the same manner as in FIG.
Is wound around the bobbin 33a after being wound around one of them, and after the winding is finished, the wire is wound around another terminal pin 16b.

As is clear from the above, the terminal pins 16b serve to hold the ends of the coil at the start of winding and to prevent fraying after winding is completed, and also to connect to the hard substrate 111.

The bobbin 33a is moved to the position indicated by the arrow 3 in FIG.
When viewed from four directions, as shown in (b-2), the screw holes 33b
Are provided, and are screw-connected to the main plate 13.
Since this screw connection can be connected more firmly than the patching stop of the first embodiment, there is no backlash of the coil 16p (16y) and the controllability is stable.

Incidentally, the screw is a magnetic material, and if it is mounted near the coil, an absorbing force acts between the screw and the permanent magnet of the support frame 12, so that the driving accuracy may be deteriorated. However, if the distance between them is some distance (for example, 3 mm), the influence of the mutual absorbing power is reduced, and the above problem is reduced by setting the mounting alignment. The above problem can also be avoided by using a non-magnetic material (such as stainless steel) for the screw.

FIG. 13A is an enlarged view of the vicinity of the guide groove (13a) in the first embodiment, and FIG.
FIGS. -1) and (b-2) are an enlarged view of the vicinity of a guide groove (35) and a front view showing a base plate and a support frame provided with the guide groove in a second embodiment of the present invention.

The difference from the first embodiment is that the guide groove 35 is notched, and that the support frame 12 is integrally formed with the roller portion 12e.

FIG. 13 (b-2) shows how to attach to the main plate 13.
As shown in the figure, the rim 35a of the guide groove 35 and the roller portion 12e are shifted from each other so as to be out of phase with each other, and the support frame 12 is turned in the direction of the arrow 36 to insert the roller portion 12e from the cutout portion of the guide groove 35. .

In the case of this method, the operation of screwing the roller 17 into the support frame 12 can be omitted, and the roller 17 and the support frame 12 can be omitted.
Since the mounting error does not occur (because of integral molding), the correction lens 11 can be accurately supported. After the assembly, the rotation in the direction indicated by the arrow 36 and the rotation in the opposite direction are regulated by the rolling regulating ring 112 and the spring 18, so that the support frame 12 does not come off the main plate 13 again.

FIG. 14A is a front view showing a part of the lock ring 113 and the support frame 12 in the first embodiment, and FIG. 11B is a front view in the second embodiment of the present invention. FIG. 3 is a front view showing a part of a lock ring 113 and a support frame 12.

In the second embodiment, FIG.
As compared with the first embodiment shown in FIG. 1, in addition to the protrusions 12b along the gravity direction (114p, 114y direction) at the time of photographing,
A projection 12f is also provided in a direction forming an angle of 45 degrees with them. This is because in the first embodiment, the play in the direction of gravity is “0.2 mm”, but the play in the oblique direction is √.
(2) In order to avoid the doubling, if the configuration is as shown in FIG. 14B, the substantial backlash can be made substantially the same (0.2 mm) in all directions.

FIG. 15A shows the support frame 12, the base plate 13, and the rolling restriction ring 11 according to the first embodiment.
FIG. 15 is a cross-sectional view showing the positional relationship of FIG.
(B-2) is a cross-sectional view illustrating a positional relationship among the support frame 12, the base plate 13, and the rolling restriction ring 37 according to the second embodiment of the present invention.

In the first embodiment, as shown in FIG. 15 (a), the shaft 112a extending from the rolling restricting ring 112 passes through the long hole 13d of the base plate 13 and the support frame 1a.
It is in two long holes 12c. In the case of this configuration, since the rolling restriction ring 112 is a thin disk, the shaft portion 112a
When providing, there is a possibility that falling may be a problem.

On the other hand, FIGS. 15 (b-1) and (b-
In the second embodiment shown in 2), a shaft portion 12g is extended from the support frame 12, and the shaft portion 12g is formed in a hole 13i formed in the base plate 13 (diameter indicated by a broken line in FIG. 15B-2). As shown in the figure, the elongate hole 3 passes through the support frame 12 and the diameter of the rolling restriction ring 37 on the disk.
7y. The shaft portion 13 of the main plate 13 is provided in the long hole 37p (perpendicular to the long hole 37y) of the rolling restriction ring 37.
j is fitted.

In the above configuration, when the rolling of the support frame 12 is restricted, there is a disadvantage that a large hole 13i is provided in the base plate 13. However, since the rolling restricting ring 37 can be formed as a thin disk having no shaft portion, the shaft can fall down. There is no need to worry about the processing accuracy.

FIG. 16A is a front view showing the positional relationship among the support frame 12, the base plate 13, and the spring 18 in the first embodiment, and FIG. 16B is a second embodiment of the present invention. FIG. 3 is a front view showing a positional relationship among a support frame 12, a base plate 13, and a spring 18 in the embodiment.

The method of hooking the spring 18 is not limited to hooking the spring 18 in three directions as shown in FIG.
As shown in FIG. 16 (b), it may be hooked in eight directions in four directions.

In the configuration shown in FIG.
The spring force of the spring 18 is not linear with respect to the driving amount in the y direction (because it is in three directions). Therefore, the control instability and the load increase (the spring constant increases toward the end) due to this, but when the springs are arranged in four directions as shown in FIG. 16B, the relationship between the driving amount and the spring force becomes Since it is linear, there is an advantage that the drive can be stabilized.

FIG. 17A is a cross-sectional view for explaining a method of mounting (electrically connecting) the terminal pins 16b to which the step motor 19 and the coil terminals are connected to the hard board 111 in the first embodiment. FIG. 17 (b)
Is a step motor 1 according to a second embodiment of the present invention.
FIG. 9 is a cross-sectional view for explaining a method of attaching a terminal pin 38 to which a terminal 9 and a coil terminal are connected to a hard board 111.

In the second embodiment, FIG.
As shown in (b), the tip of the terminal pin 38 of the coil 16p (16y) and the step motor 19 is tapered, and the hard substrate 111 is attached to the shaft 13k of the base plate 13 with a screw 39.
Then, the terminal pins 38 are connected to the hard board 11
It is designed to fit into 1.

The hard substrate 111 has a small hole (smaller than the diameter of the body portion of the terminal pin 38) having an electrode pattern at a contact position in advance, and the terminal pin 38 is fitted to make electrical connection. Connection can be made, and the first embodiment shown in FIG.
The soldering step required between the terminal pin 16b and the hard board 111 in the form (1) can be eliminated.

FIG. 18A is a sectional view showing the positional relationship among the Hall element 110p (110y), the yoke 15, the permanent magnet 14p (14y), and the coil 16p (16y) in the first embodiment. 18 (b-1), (b-
2) is a Hall element 1 according to the second embodiment of the present invention.
10p (110y), yoke 310, permanent magnet 14p
It is the figure which showed the front and the cross section of the positional relationship of (14y) and the coil 16p (16y).

In the position detection by the Hall element 110p (110y), a linear position can be detected only in a linear range of the magnetic field distribution. In the first embodiment shown in FIG. 18A, adjacent permanent magnets 14p having opposite polarities are adjacent to each other.
A linear magnetic field change can be obtained only in the range 14a of (14y).

On the other hand, FIGS. 18 (b-1) and (b-)
In the second embodiment shown in 2), the yoke 310
The center of is missing. By attaching such a deformed yoke 310 to the permanent magnet 14p (14y), the distribution of the magnetic field can be changed, and the detection stroke can be controlled.

The shape of the yoke 310 is shown in FIG.
The magnetic field distribution may be controlled by forming a convex shape or a concave shape as shown in FIG. 18C or FIG.

(Third Embodiment) FIGS. 19 to 26 are diagrams relating to a shake correction apparatus according to a third embodiment of the present invention, in which elements different from the first or second embodiment are described. Only the outline is shown.

Note that, in this embodiment as well, the shake correcting apparatus having the following modified elements is the third embodiment as described above, but this is for the sake of convenience of description, and at least one A device provided with one or more changing elements is considered as a shake correction device according to the third embodiment.

FIG. 19 is a sectional view showing a portion related to the driving means of the support frame 12 (correction means) according to the third embodiment of the present invention, which is a changed part of FIGS. 11 (a) and 11 (b). Is equivalent to

As in the first embodiment (see FIG. 11A), the permanent magnet 6 magnetized in the direction of the arrow 13c is used.
1 is provided on the support frame 12. An electromagnet 62 composed of a U-shaped core 62a and a coil 62b is arranged to face the permanent magnet 61.
By switching the direction of current flow to the permanent magnet 61,
The repulsion can be controlled, so that the support frame 12 can be driven.

The advantage of this driving method is that the permanent magnet 61 is pulled by the core 62a when the coil is not energized (when vibration correction is not required), so that the support frame 12 is locked (locked). . Therefore, special means for locking the support frame 12 (step motor 19, lock ring 11)
3) is not required.

Also, when the lock ring 113 is provided to correctly position the support frame 12, there is an advantage that the lock play is absorbed by the attraction force of the permanent magnet 61 and the core 62a.

FIGS. 20 (a) and 20 (b) are views showing a side surface and a back surface of a coil unit according to a third embodiment of the present invention, which is a modification of FIGS. 12 (a) and 12 (b). Part.

The coil 63 is a printed coil or a laminated coil, and the terminal pin 16b is soldered to the terminal 63c of the resin base 63a. A hole 63 provided integrally with the coil 63
The coil 63 is screwed to the base plate 13 by utilizing b.

When a printed coil or a laminated coil is used as the coil as described above, the coil is less warped and the dimensional control can be stricter than that of the coil of the first embodiment, and the second embodiment can be used. In the case of using a bobbin as described above, there is no need to increase the gap between the bobbin flange (0.2 mm) and the permanent magnet, so there is an advantage that the driving force can be increased.

FIG. 21 is a sectional view showing the positional relationship between the support frame 12, the base plate 13 and the like according to the third embodiment of the present invention, which corresponds to a changed part of FIGS. 13 (a) and 13 (b). I do.

As shown in FIG. 21, a guide groove 66 is provided on the flange 67 on the support frame 12 side.
The shaft 65 that fits into the guide groove 66 may be screwed to the hole 64a on the flange 64 on the base plate 13 side.

In this case, the weight can be reduced because there is no need to attach the rollers to the support frame, and the permanent magnet 14p (14y), the coil 16p (16y), the yoke 1
By providing 5p (15y), space saving can be achieved. (In the first and second embodiments, the arm portion 12a becomes thicker because the roller 17 is provided on the support frame 12, so that a permanent magnet or the like cannot be provided in the same direction as the arm portion 12a.) It is needless to say that not only a permanent magnet and the like but also other members such as a spring may be provided in the same direction as the arm 12a.

FIG. 22 is a front view showing the positional relationship between the support frame 12 and the lock ring 113 according to the third embodiment of the present invention, which corresponds to a changed part of FIGS. 14 (a) and 14 (b). I do.

The difference from the first embodiment (see FIG. 14A) is that, as shown in FIG.
The projection 113d on the 3 side, the cam 12g on the support frame 12 side,
It is a point provided respectively.

The lock ring 113 is a thin ring. If a cam 113d is provided on the lock ring 113 side as shown in FIG. 14 (a), the thickness of that portion is further reduced, and there is a risk of deformation. there were. Since the correction lens is fitted on the support frame 12 side, there is no deformation during use even if the thickness is slightly thin. Therefore, in the configuration of FIG. 22, the component rigidity can be increased.

FIG. 23 is a sectional view showing the positional relationship among the support frame 12, the base plate 13, and the rolling restricting ring 37 according to the third embodiment of the present invention.
This corresponds to the changed part of (b).

The rolling restricting ring 37 is sandwiched between the support frame 12 and the fixed frame 69, and a smooth metal shaft 68 is fixed. Since the shaft 68 is supported by being sandwiched between the support frame 12 and the fixed frame 69, the inclination of the shaft (the inclination of the shaft 68 with respect to the support shaft 12) is suppressed. Also, since the shaft 68 is a smooth metal pin, friction between the shaft 68 and the hole 37y is extremely small.

Here, the fact that the friction between the shaft 68 and the hole 37y is taken into consideration will be described.

In general, when the direction of gravity at the time of photographing with a camera is 610, the support frame 12 is controlled by coils and magnets against gravity. At this time, since the rolling restriction ring 37 is also pulled in the direction of the gravity 610, the own weight of the rolling restriction ring 37 is
Join 8 Therefore, the vertical reaction force between the shaft 68 and the elongated hole 37y is larger than the drag force between the elongated hole 37p and the shaft 13j, so that the friction is increased only in this direction, and the driving accuracy is deteriorated.

For this reason, the shaft 68 is used as a metal pin to
The slip with y is improved. Further, since the shaft 68 is sandwiched between the support frame 12 and the fixed frame 69, the bending in the rolling direction is reduced, and the regulation accuracy in this direction can be increased.

FIG. 24 is a front view showing the positional relationship among the support frame 12, the base plate 13, and the spring 18 according to the third embodiment of the present invention, which is a modified part of FIGS. 16 (a) and 16 (b). Is equivalent to

The difference from the first embodiment (see FIG. 16A) is that the spring 18 is spirally wound as shown in FIG. Therefore, the support frame 12 is indicated by the arrow 6
11 receives a rotational force. However, the rolling direction of the support frame 12 is
(Not shown), it does not rotate in the direction of arrow 611.

In the case of such a configuration, the rolling restricting ring 112, the base plate 13, and the rolling restricting ring 112
The slight play between the support frame 12 and the support frame 12 is indicated by the arrow 6 of the spring 18.
It is absorbed by being precharged by the rotation force in 11 directions,
It can be a shake correction device without rolling backlash.

It is needless to say that the number of springs 18 is not limited to three as shown, but may be four as shown in FIG.

FIG. 25 shows a third embodiment of the present invention in which terminal pins connected to the step motor 19 and the coil terminals are mounted on the hard substrate 111 (electrical connection is performed).
FIG. 17 is a cross-sectional view for explaining the method, which is shown in FIG.
This corresponds to the changed part of (a) and (b).

The step motor 19 is provided on the hard substrate 111.
Are attached in advance, and the soldering operation is completed, and the step motor 19 is not connected to the base plate 13 by screws or the like. (The base plate 13 only guides the position of the step motor 19.) In this way, if the step motor 19 is attached to the hard board 111 side in advance and unitized,
The work of attaching the step motor 19 to the base plate 13 and the work of soldering the hard substrate 111 and the terminals 19a of the step motor 19 can be omitted from the main assembly process. Therefore, the assembly process is further simplified, and the reliability is improved.

The terminal pins 38 connected to the coil terminals of the coil 16p (16y) are provided in the second embodiment (FIG. 17).
(See (b))), the tip is formed in a tapered shape.
By screwing into the third shaft 13k, electrical connection is possible.

FIG. 26 is a sectional view showing a positional relationship among a Hall element 110p (110y), a yoke 310, a permanent magnet 14p (14y), and a coil 16p (16y) according to a third embodiment of the present invention.

In the third embodiment, the Hall element 1
10p (110y), as shown in FIG.
It is provided at the end of p (15y).

In the case of the first embodiment (see FIG. 18A), the magnetic field changes drastically in the vicinity of the two poles and the sensitivity can be increased, but the magnetic field change is linear over a long stroke. Cannot be performed, and the range of linear output in the detection stroke is limited.

On the other hand, in the case of the configuration shown in FIG. 26, the change in the magnetic field becomes gentle because there is no change in polarity in the adjacent portion. Therefore, the linear range of the change in the magnetic field becomes wider,
The range where a linear output can be obtained can be widened.

According to each of the above embodiments, the following effects can be obtained. (1) Providing the permanent magnet on the support frame (movable side) eliminates the need for wiring to the movable side, thereby improving assembly reliability. (2) High-speed response is ensured by using an open magnetic path for the permanent magnet. (3) By providing the permanent magnet with a yoke, a strong magnetic field can be realized with a thin permanent magnet, and the cost of the permanent magnet can be reduced. (4) The permanent magnet is attracted to the yoke, and the yoke is attached to the support frame, so that troublesome adhesion of the permanent magnet is eliminated. (5) Since the winding center of the coil is aligned with the driving direction and the permanent magnet is driven by attracting and repelling, the air core of the coil can be effectively used for other members (for example, supporting rollers). It was made compact. (6) Since the permanent magnets of the support frame are driven by attracting and repelling the electromagnets on the base plate side, the support frames can be locked by mutual attraction when not in use, and the locking means can be omitted. Furthermore, the rock backlash was eliminated. (7) Since the coil is formed by insert molding of a unitized frame and terminal pins, attachment to the base plate is facilitated. (8) The coil can be wound around the bobbin, so that the cost can be reduced and the size can be strictly controlled. (9) By using a printed coil or a laminated coil as the coil, the gap with the permanent magnet can be reduced (because there is no warping or undulation of the coil), and the driving force can be increased.

Further, it has the following effects. (10) Since the support between the main plate and the support frame is provided by the rollers and the guide grooves, the assembly is easy and the mounting accuracy is high. (11) By making the rollers eccentric, the inclination of the correction lens can be adjusted without providing any special inclination adjusting means, and the entire apparatus can be made compact. (12) The provision of the notch in the interior groove makes it easier to attach the support frame to the base plate, and the rollers can be integrated with the support frame, so that the dimensional accuracy can be strict. (13) By providing the interior groove on the support frame side, the weight of the support frame can be reduced (there is no need to attach rollers), and the periphery of the guide groove can be effectively used for other members (for example, permanent magnets), making it compact. Was. (14) The fitting play between the lock ring and the support frame is set at four points along the direction of gravity during photographing, so that the fitting play can be reduced. (15) By providing the fitting portion between the lock ring and the support frame along the direction of gravity at the time of photographing and its 45 deg direction, fitting play in all directions can be reduced. (16) By providing the fitting projection on the lock ring side, the rigidity of the component can be increased. (17) By matching the sensitivity axis of the position detection sensor with the thrust center axis of the coil, the position detection error due to rolling can be reduced. (18) By arranging the rolling restricting ring on the back surface of the main plate, another member (step motor) can be installed on the support frame side of the main plate, and the whole apparatus is made compact. (19) The rolling restriction ring is formed in a thin disk shape, and a method in which pins from the support frame and the base plate are fitted to each other, thereby achieving compactness and high rigidity. (20) Pins from the support frame that fit into the rolling restriction ring are metal pins, and by connecting the tip portions of the pins to each other, it is possible to increase the falling and bending rigidity of the pins and to increase the restricting force in the rolling direction. done. Further, by using a metal pin, the frictional force with the elongated hole could be reduced.

Further, it has the following effects. (21) The rolling play could be elastically absorbed by hanging the tension spring on the hook in the radial direction and away from the center and pulling the support frame. (22) By using a tension spring in a cross shape, the change in spring force could be made linear. (23) By setting the spring force of the tension spring to act in the rolling direction and pre-charging the restricting force of the rolling restricting ring, it is possible to eliminate rolling play. (24) Since the coil and the step motor are aligned on the same surface and the respective terminal pins are provided in the same direction, the soldering work when assembling the hard substrate is facilitated. (25) The tip of the terminal pins of the coil and the step motor is pointed and cut into the hard substrate, so that the soldering work can be omitted. (26) By mounting the step motor on the hard board in advance and soldering it, the troublesome work for that is omitted from the main assembly process, and the production capacity is improved. (27) By using the Hall element as the position detection sensor, complicated steps such as mounting and wiring of the IRED can be omitted. (28) By making the Hall element face the permanent magnet via the yoke, the detection stroke could be increased even if the gap between them was narrow. (29) By changing the shape of the yoke, the distribution of the magnetic field could be controlled, and the detection linearity range of the Hall element could be widened. (30) The linearity range can be widened by installing the Hall element at a position where the end magnetic field of the permanent magnet is detected. (32) By using the magnetic shunt alloy as the yoke, the temperature change of the sensitivity of the Hall element could be moderated. (33) By providing the Hall element and the coil on the opposite surface across the permanent magnet, the influence of magnetic field fluctuation due to coil energization was eliminated, and the position detection accuracy was improved.

(Modification) The present invention is suitable for a photographing apparatus such as a single-lens reflex camera or a video camera, but is not limited to this. It is also possible to apply to an optical device that demonstrates. When the present invention is applied to a photographing apparatus as described above, a CCD is used instead of the correction lens in each of the above embodiments.
It is needless to say that the shake correction can be performed in the same manner even in a configuration having an image pickup device such as.

In each of the above embodiments, the support frame 1
A tension spring 18 is provided between the base plate 2 and the base plate 13 so as to be pulled in an eight-piece manner so as to elastically absorb the rolling play. Means for elastically biasing may be used.

[0246]

As described above, according to the first and second aspects of the present invention, the compensating means is pulled in an eight-split manner by the tension spring, and the play around the first direction (play around the optical axis). Elastically, and the tension spring, when viewed from the front of the correction means, has a structure provided in the same phase as the plurality of radiation axes, so that the rolling play of the support frame is reduced, and Accuracy can be increased,
Moreover, the size of the device can be reduced.

According to the third aspect of the present invention, a plurality of tension springs are all arranged only in the direction of the shake correction of the correcting means, so that the spring constant at the time of shake correction is made constant. Therefore, the rolling play of the support frame can be reduced, and the accuracy of the shake correction drive can be increased.

According to the present invention, the tension spring for urging the correction means around the optical axis is helically arranged as viewed from the front of the correction means, and the spring force of the tension spring is adjusted by the correction means. Since a rotation force around the optical axis is generated so as to precharge the rotation restricting means of the correction means, it is possible to reduce the rolling backlash of the support frame and increase the accuracy of the shake correction drive.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing main components of a shake correction apparatus according to a first embodiment of the present invention.

FIG. 2 is a front view showing the shake correction apparatus of FIG. 1 with a hard substrate removed.

FIG. 3 is a diagram showing an internal configuration of a side surface and a main part from the direction of arrow A in FIG. 2;

FIG. 4 is a sectional view taken along line B-B 'of FIG.

FIG. 5 is a diagram illustrating a configuration of a coil unit according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional view for explaining a configuration of a drive unit for shake correction according to the first embodiment of the present invention by comparison with a conventional configuration.

FIG. 7 is a front view showing a hard substrate according to the first embodiment of the present invention.

FIG. 8 is a diagram illustrating a support frame and a base plate according to the first embodiment of the present invention, as viewed from the back surface of FIG. 2;

FIG. 9 is a diagram showing a lock ring and a rolling restriction ring according to the first embodiment of the present invention.

FIG. 10 is a front view for explaining a configuration of means for locking the correction means according to the first embodiment of the present invention by comparison with a conventional configuration.

FIG. 11 is a cross-sectional view for explaining a configuration of a shake correction driving unit according to a second embodiment of the present invention by comparison with the configuration according to the first embodiment;

FIG. 12 is a diagram for explaining a configuration of a coil unit according to a second embodiment of the present invention by comparison with the first embodiment;

FIG. 13 is a diagram for explaining a positional relationship between a support frame and a base plate according to the second embodiment of the present invention by comparison with the first embodiment.

FIG. 14 is a front view for explaining a configuration of a means for locking a correction means according to a second embodiment of the present invention by comparison with the first embodiment;

FIG. 15 is a diagram for explaining a positional relationship among a support frame, a main plate, and a rolling restriction ring according to a second embodiment of the present invention by comparison with the first embodiment.

FIG. 16 is a front view for explaining a positional relationship among a support frame, a base plate, and a spring according to a second embodiment of the present invention by comparison with the first embodiment.

FIG. 17 is a cross-sectional view for explaining a method of attaching a step motor or the like to a hard board according to the second embodiment of the present invention by comparison with the first embodiment;

FIG. 18 is a cross-sectional view for explaining a configuration of a means for performing position detection of a correction unit according to the second embodiment of the present invention by comparing with the first embodiment.

FIG. 19 is a cross-sectional view illustrating a configuration of a shake correction driving unit according to a third embodiment of the present invention.

FIG. 20 is a diagram illustrating a configuration of a coil unit according to a third embodiment of the present invention.

FIG. 21 is a cross-sectional view illustrating a positional relationship between a support frame and a base plate according to a third embodiment of the present invention.

FIG. 22 is a front view showing a positional relationship between a support frame and a lock ring according to a third embodiment of the present invention.

FIG. 23 is a cross-sectional view illustrating a positional relationship among a support frame, a base plate, and a rolling restriction ring according to a third embodiment of the present invention.

FIG. 24 is a front view showing a positional relationship among a support frame, a main plate, and a spring according to a third embodiment of the present invention.

FIG. 25 is a cross-sectional view for explaining a method of attaching a step motor or the like to a hard board according to the third embodiment of the present invention.

FIG. 26 is a cross-sectional view for explaining a configuration of a means for performing position detection of a correction means according to the third embodiment of the present invention by comparing with the first embodiment;

FIG. 27 is a perspective view illustrating a schematic configuration of a conventional vibration isolation system.

FIG. 28 is an exploded perspective view showing the structure of the shake correction apparatus of FIG. 27.

FIG. 29 is a view for explaining the shape of a hole in the support frame into which the holding means of FIG. 28 is inserted.

30 is a cross-sectional view showing a state where a support frame is incorporated in the main plate of FIG. 28.

FIG. 31 is a perspective view showing the main plate shown in FIG. 28;

FIG. 32 is a perspective view showing the support frame shown in FIG. 28.

FIG. 33 is a perspective view showing the lock ring shown in FIG. 28.

FIG. 34 is a front view showing the support frame and the like in FIG. 28;

FIG. 35 is an IC for amplifying the output of the position detecting element of FIG. 28;
FIG. 3 is a circuit diagram showing the configuration of FIG.

36 is a diagram showing a state when the lock ring of FIG. 28 is driven.

FIG. 37 is a diagram showing signal waveforms at the time of lock ring driving in FIG. 36.

FIG. 38 is a block diagram illustrating a part of a circuit configuration of an image stabilizing system of a camera equipped with the image stabilizing system.

FIG. 39 is a block diagram showing the remaining part of the circuit configuration of the image stabilizing system of the camera equipped with the image stabilizing system.

40 is a flowchart showing a schematic operation of the camera in the circuit configurations of FIGS. 27 and 28.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Correction lens 12 Support frame 12e Roller part 13 Base plate 13a Guide groove 14p, 14y Permanent magnet 15p, 15y Yoke 16b Terminal pin 16p, 16y Coil 17 Roller 18 Spring 35 Guide groove 111 Hard board 112 Rolling regulation ring 113 Lock ring

Claims (6)

[Claims] 1. A correcting means for correcting a shake, a supporting means for restricting the correcting means only in a first direction by a plurality of fitting portions, and a direction perpendicular to the first direction from a correction center of the correcting means. A plurality of radial axes extending radially toward the plurality of fitting portions on a plane; andelastic means for elastically connecting the correcting means and the supporting means along the plurality of radial axes. Image stabilizer. 2. The vibration correcting device according to claim 1, wherein the elastic means is a tension spring that connects a vicinity of a peripheral end of the correction means and a vicinity of a peripheral end of the support means. 3. A system comprising: a correcting means for correcting a shake; a supporting means for supporting the correcting means; and a tension spring for elastically connecting a peripheral end of the correcting means and a peripheral end of the supporting means. In a shake correction device, the tension spring is provided along a correction direction of the correction means, passing through a correction center of the correction means, and the correction means is substantially pulled by pulling the correction means in a plurality of directions. A shake correction device, which is located at a correction center. 4. A correcting means for correcting a shake, a supporting means for restricting and supporting the correcting means only in a first direction, a rotation restricting means for restricting rotation of the correcting means around the first direction, And a biasing unit for biasing the correction unit around the first direction. 5. The shake correcting apparatus according to claim 4, wherein said urging means is an elastic means for elastically connecting said correcting means and said supporting means. 6. The elastic means is a tension spring for elastically connecting a peripheral end of the correction means and a peripheral end of the support means, and a spring force of the tension spring is a first force of the correction means. The vibration correcting device according to claim 5, wherein the vibration correcting device is provided in an array that generates a rotational force around the direction.