JPH0980514A - Substrate fitting device and lens barrel using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a substrate fitting device by which an electronic circuit on a substrate can be stably actuated by providing a half blanked part obtained by making the substrate and a metallic plate adjacent to the substrate project to one part of the metallic plate on the substrate side and coupling them by using a coupling means by making the half blanked part abut on the substrate. SOLUTION: A first yoke 712, the hard substrate (substrate) 715 and a bottom board (supporting means) 71 are coupled by a screw 21 as a coupling means. The embossed part (half blanked part) of the first yoke 712 is the projection part or the recessed part formed by providing a metallic mold with a projection for punching the yoke 712 by the diameter of (ϕd) and stopping the punching operation thereof until the part of board thickness (t2 ) without punching out the whole board thickness (t1 ) (t2 <t1 ). The embossed part 712c is the projecting shape when it is viewed from the surface of the yoke 712 and it is the recessed shape when it is viewed from the back surface thereof. The column 71n of the board 71 enters the recessed shape and the substrate 715 abuts on the surface 712d of the projecting shape. Then, both of them are screwed to the hole 71g of the board 71 by the screw 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate mounting device and a lens barrel using the same, and in particular, electrical parts are mounted in the lens barrel used in optical equipment such as 35 mm film cameras and video cameras. A hard substrate and a metal plate or the like for electromagnetic driving adjacent to the hard substrate are coupled to each other by using a convex portion or a concave portion formed by embossing the metal plate,
It is suitable for mounting.

[0002]

2. Description of the Related Art Conventionally, in a lens barrel used in an optical apparatus, a board (hard board) on which an electronic circuit is mounted is attached to and held by a metal plate for electromagnetic driving. The mounting method at this time is, for example, mounting the substrate on a metal box (shield case) via a spacer or the like,
Alternatively, a metal box is soldered to the board so as to cover the elements mounted on the board.

[0003]

In the above-described method of mounting a metal plate for electromagnetic drive on a substrate on which an electronic circuit is mounted in a lens barrel, the metal box and the substrate are both the substrate in both cases. It is sufficiently separated from the mounting surface so that the mounting surface does not come into contact with the metal box and circuit malfunction does not occur. For this reason, there is a tendency for the size to be increased as a whole (especially in the thickness direction of the substrate).

Further, in the method of using a metal box for the purpose of shielding an electronic circuit, in the recent precision equipment, due to the high density of the mechanism, a layout in which a metal component and a substrate are adjacent to each other is unavoidable. . In such a case, if both are not properly attached, there is a possibility that they will come into contact with each other, and adjacent metal plates may act as antennas to cause the board to malfunction.

According to the present invention, in a lens barrel used for optical equipment, a metal plate for electromagnetic drive adjacent to a hard substrate on which electronic parts are mounted is provided on the metal plate by embossing, or It is an object of the present invention to provide a substrate mounting device that can be easily mounted by utilizing a concave portion and can stably operate an electronic circuit on the substrate, and a lens barrel using the same.

[0006]

A board mounting device according to the present invention comprises: (1-1) a half-blanked portion which projects a board and a metal plate adjacent to the board to a part of the metal plate on the board side. It is characterized in that it is provided, and the half-blank portion is brought into contact with the substrate and is joined by a joining means.

(1-2) A bent portion is formed by bending a substrate and a metal plate adjacent to the substrate on a part of the metal plate on the substrate side, and a thickness end face of the metal plate at the bent portion. Is brought into contact with the substrate and is coupled by a coupling means.

In particular, in the configurations (1-1) and (1-2), a conductive pattern is provided on the contact surface of the substrate with the metal plate, and the metal plate is in contact with the conductive pattern. Are electrically connected to each other, and the metal plate and supporting means for supporting the substrate are fastened together on the contact surface of the substrate with the metal plate.

The lens barrel of the present invention is characterized in that (2-1) the substrate mounting device having the configuration (1-1) or (1-2) is housed and held in the housing.

The optical apparatus of the present invention is characterized in that (3-1) an image is formed on a predetermined surface by using the lens barrel having the configuration (2-1).

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view of essential parts of a first embodiment when the present invention is applied to a lens barrel of an optical device using a vibration isolation system. In the figure, the rear protruding ears 71a of the main plate 71 (three locations are provided in the figure, but two locations are shown in the figure) are fitted to a lens barrel (not shown), and a known lens barrel roller or the like is formed into a hole. It is screwed to 71b and fixed to the lens barrel.

A second yoke (fixing portion) 72 made of a magnetic material and plated with luster is screwed to a hole 71c of a base plate 71 with a screw penetrating a hole 72a provided on the circumference. A permanent magnet 73 (shift magnet) such as a neodymium magnet is magnetically attracted to the second yoke 72. The arrow 73a indicates the magnetization direction of each permanent magnet 73. 74 is a lens as an optical element for image stabilization. The coils 76p and 76y (shift coils) are patch-bonded to a support frame 75 to which the lens 74 is fixed with a C-ring or the like.
Light emitting elements 77p and 77y such as IRED are also adhered to the back surface of the support frame 75. Light fluxes from the light projecting elements 77p and 77y pass through the slits 75ap and 75ay and are described later in PSD.
And the like, and enters the position detecting elements 78p and 78y.

The holes 75b (three places) of the support frame 75 are shown in FIG.
As shown in FIG. 7, support balls 79a, 79b having a spherical tip end such as POM
Also, the charge spring 710 is inserted, and the support ball 79a is fixed by heat-crimping to the support frame 75 (support ball 79b).
Is slidable in the extending direction of the hole 75b against the spring force of the charge spring 710. ).

FIG. 2 shows a cross-sectional view of the lens barrel after assembly, in which a support ball 79b, a charged charge spring 710, and a support ball 79a are loaded in the hole 75b of the support frame 75 in the direction of arrow 79c in this order. And then (support balls 79a, 79
(b is a component of the same shape) Finally, the peripheral end portion 75c of the hole 75b is thermally caulked to prevent the support ball 79a from coming off.

FIG. 3 is a cross-sectional view of a main part orthogonal to the hole 75b of FIG. 2, and FIG. 4 is a plan view of the main part when viewed from the direction of arrow 79c in FIG. Each point A to D in FIG. 4 corresponds to each point A to D in FIG. Here, the rear end of the blade portion 79aa of the support ball 79a is received and regulated in the range of the depth A surface. For this reason, the support ball 79a is fixed to the support frame 75 by thermally caulking the peripheral end portion 75c.

The tip of the blade portion 79ba of the support ball 79b is received within the depth B plane. For this purpose, support balls 79
b is prevented from coming off in the direction of arrow 79c from the hole 75b by the charge spring force of the charge spring.
When the assembly of the lens barrel is completed, the support ball 79b is received by the second yoke 72. For this reason, although it does not come out of the support frame 75, the B surface is provided in the retaining area in consideration of the assemblability.

2 to 4, the hole 75b of the support frame 75 is shown.
The shape of does not require a complicated inner diameter slide mold even when the support frame 75 is formed by molding, and can be formed by a simple two-divided mold in which the mold is pulled out on the side opposite to the arrow 79c, so that the dimensional accuracy can be set strictly. I am doing it.

Further, since the support balls 79a and 79b are the same parts, there are no assembly mistakes, which is advantageous in parts management. In FIG. 1, for example, fluorine-based grease is applied to the bearing 75 d of the support frame 75, and an L-shaped shaft 711 (a non-magnetic stainless material) is charged, and the other end of the L-shaped shaft 711 is formed on the main plate 71. The bearing frame 71d (similarly coated with grease) is placed on the second yoke 72 together with the three supporting balls 79b, and the support frame 75 is housed in the base plate 71.

Next, the positioning holes 712a (3 places) of the first yoke 712 as a metal plate for electromagnetic driving are fitted to the pins 71f (3 places in FIG. 5) of the base plate 71, and the receiving surface 71e.
It receives the first yoke 712 at (five places) and is magnetically coupled to the base plate 71 (magnetic force direction 73 of the permanent magnet 73).
a). As a result, the back surface of the first yoke 712 is supported by the support ball 79.
a, and the support frame 75 is attached to the first yoke 7 as shown in FIG.
It is sandwiched between 12 and the second yoke 72 and positioned in the optical axis direction.

Support balls 79a, 79b and first yoke 712
Fluorine-based grease is also applied to the contact surfaces of the first and second yokes 72, 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 has the support frame 75 with the arrows 713p, 7
It is supported so as to be slidable only in the 13y direction, and thereby the relative rotation (rolling) of the support frame 75 with respect to the base plate 71 about the optical axis is restricted.

The L-shaped shaft 711 and the bearings 71d and 75d
Is set to be large in the optical axis direction to prevent overlapping with the optical axis direction regulation by sandwiching the support balls 79a and 79b with the first yoke 712 and the second yoke 72. . The insulating sheet 7 is provided on the surface of the first yoke 712.
14 is covered with a plurality of ICs (position detecting element 7
8p, 78y, output amplification IC, coil (75p, 76y
y), a hard substrate 715 having a driving IC, etc.) is fitted in the positioning holes 715a (two places) with the pins 71h (two places in FIG. 5) of the base plate 71, and the holes 715b and the first yoke 71 are formed.
The second hole 712b and the hole 71g of the base plate 71 are screwed together.

Position detecting elements 78p and 78y are positioned on the hard board 715 by a tool and fixed by soldering. Flexible board 71 for signal transmission
6, the surface 716a is thermocompression-bonded to a region 715c surrounded by a broken line on the back surface of the hard substrate 715. Flexible board 71
6 and a pair of arms 716b in a plane direction orthogonal to the optical axis.
p and 716by are extended and hooked on the hook portions 75ep and 75ey of the support frame 75, respectively, as shown in FIG. 6, the terminals of the IRED 77p and 77y and the coils 76p and 76y.
The terminals are soldered.

As a result, the IRED 77p and 77y and the coil 7
6p and 76y are driven from the hard substrate 715 via the flexible substrate 716. The bent portions 7 are respectively provided on the arm portions 716bp and 716by of the flexible substrate 716.
16 cp and 716 cy are provided.
The arm 716b against the support frame 75 moving around in a plane orthogonal to the optical axis due to the elasticity of 16cp and 716cy.
The load of p, 716by is reduced.

The first yoke 712 has a protruding surface (convex portion) 712c by embossing as described later, and the protruding surface 712c
Passes through the hole 714a of the insulating sheet 714 and the hard substrate 71
It is in direct contact with 5. The hard substrate 715 of this contact surface
A ground (GND) pattern is formed on the side, and the first yoke 712 is grounded by screwing the hard substrate 715 to the base plate 71 with a screw as a coupling means, and becomes the antenna. I try not to give noise.

Next, the combined state of the first yoke 712 and the hard substrate 715 of this embodiment will be described.

FIG. 15 shows the first yoke (metal plate) 71 of FIG.
It is an enlarged explanatory view of 2. FIG. 16 shows the first yoke 7 of FIG.
The line segment A of the alternate long and short dash line 11 on the projecting surface (also referred to as projecting portion or projecting portion) 712c provided by embossing (half blanking) on 12
It is a principal part sectional drawing of -A.

FIG. 16 shows a sectional view in which the first yoke 712, the hard substrate (substrate) 715, and the base plate (supporting means) 71 are coupled by the screw 21 as coupling means.
The embossed portion (half-blanked portion) of the first yoke 71 is a protrusion for forming a hole having a diameter φd shown in FIG. It is a protruding portion (convex portion) or a concave portion formed by stopping all the plate thickness t ₁ of the first yoke 712 up to the plate thickness t ₂ (t ₂ <t ₁ ) without punching. The embossed portion 712c has a convex shape when viewed from the front surface of the first yoke 712 (the shape viewed from the paper surface of FIG. 1 to the right), and the embossed portion 712c looks from the back surface (the shape viewed from the right surface of the paper surface of FIG. 1) to the left. It has the same concave shape.

The pillar 71n of the base plate 71 is formed in the concave shape (φd).
(Pillar having hole 71g) is inserted, and convex shape (φ
The hard substrate 715 is provided on the surface (contact surface) 712d of d).
Are abutted, the holes 712b and 715b are aligned coaxially, and the screws 21 are fastened together with the holes 71g of the base plate 71.

FIG. 17 is a schematic view of a surface (shape viewed from the left side to the right side of FIG. 1) of the hard substrate 715. In the figure, a conductor pattern 715d is provided around the hole 715b formed in the hard substrate 715, and the pattern of the same shape is also provided at the opposite position on the back surface.
The conductor patterns on the contact surfaces of the front surface and the back surface are electrically connected (through holes) to each other by the conductor pattern on the inner peripheral surface of the hole 715b.

The conductor pattern 715d is the hard substrate 71.
5 is connected to the ground line (earth) of the circuit mounted on the hard board 715 from the back side of the board 5, and this ground line is connected to the ground line of the circuit on the main board (not shown) through the flexible board 716. ing.

Therefore, as shown in FIG. 16, when the screw 21 is tightened, the surface 712d of the first yoke 712 becomes hard substrate 7.
15 and the conductor pattern 715d on the back surface of the screw 15,
Also with the screw head, the surface conductor pattern 71 of the hard substrate 715
It contacts 5d and is grounded together.

The advantages of the board mounting method having the above configuration will be described below.

First, since the convex portion (712c) formed by embossing is provided on the first yoke 712 and the hard substrate 715 is connected at this portion, the hard substrate 715 and the first yoke 712 do not contact at other portions. , Hard substrate 7 by contact
It prevents short circuit of the circuit above 15.

Secondly, the first yoke 71 is formed by the convex portion 712c.
Since 2 is grounded, the first yoke 712 serves as an antenna and does not give noise to the circuit on the hard substrate 715.

Thirdly, the hard substrate 715 and the first yoke 7
Since 12 is fastened together with the hole 71g of the base plate 71 by the screw 21, the hard substrate 715 and the first yoke 712 are attached to the base plate 71 in one operation, and the workability is good.

Fourth, since the convex portion 712c of the first yoke 712 is formed by embossing (half blanking), the hard substrate 7
15 can be made compact.

Next, this will be described with reference to FIG. In FIG. 18, the hard substrate 715 of the first yoke 712.
It shows a case where the joint convex portion with is formed by bending (range 712e). In this case, the bent shoulder R (arrow 712f) is gradually separated from the hard substrate 715, and a circuit cannot be mounted on the hard substrate 715 within the range of the gap δ (φ _D ).

This is the hard substrate 715 and the first yoke 71.
2 is because there is a small gap in this range and there is a risk of contact with each other. Therefore, the embossing (half blanking) process in which the convex portion changes in a step shape can more effectively use the mounting area on the hard substrate 715, and the hard substrate 715 can be made compact. The hard substrate 715 and the first yoke 7
As a method for electrically connecting 12 to each other and effectively utilizing the mounting area on the hard board, a metal washer 51 having a small diameter is provided between the hard board 715 and the first yoke 712 as shown in FIG. Hard board 7 through 51
The circuit mounting area around the hole 715b can be effectively used by electrically connecting 15 and the first yoke 712 and reducing the diameter of the metal washer 51.

However, in this case, the metal washer 5
The workability is complicated by the increase in the number of parts of 1 (2 points) (the screw 21 needs to be passed through the hard substrate 715 and further tightened in the hole 71g while passing through the metal washer 51). is there.

In this embodiment, by constructing each element as described above, the components can be easily mounted, the substrate can be made compact, and the reliability of the circuit operation on the substrate can be improved.

In particular, in this embodiment, the hard substrate 715 and the metal plate 712 are brought into contact with each other at the thickness end faces of the metal plate at the half-blanked portion protruding toward the substrate side from the metal plate or the bent portion bent toward the substrate side. By coupling, the substrate and metal plate do not contact except the contact surface, and it can be mounted compactly, and no special member for mounting is required, so the mounting is simple. Further, a conductor pattern is provided on the substrate side of the contact surface so as to be electrically connected to the metal plate and the metal plate is grounded, so that the circuit is always stably operated.

Returning to FIG. 1, the mask 717 is positioned on the pin 71h of the base plate 71 and fixed on the hard substrate 715 with a double-sided tape. A through hole 71i for a permanent magnet is opened in the base plate 71, and from this, the second yoke 72 is formed.
The back of is exposed. The yoke 7 is placed in the through hole 71i.
The permanent magnet 718 (lock magnet) provided on the magnet 27 is incorporated and magnetically coupled to the second yoke 72 (FIG. 2).

FIG. 7 is a schematic view of the lens barrel after assembly is viewed from the back side of FIG. The outer diameter cutouts 719c (three places in FIG. 8) of the lock ring (locking part) 719 are matched with the phases of the inner diameter projections 71j (three places) of the base plate 71, and the lock ring 719 is pushed into the base plate 71. 719 is turned in the unlocking direction (counterclockwise direction in the figure) to be bayonet-coupled to the main plate 71. As a result, the lock ring 719 is restrained in the optical axis direction with respect to the base plate 71, and can be rotated around the optical axis.

Then, the lock ring 719 rotates, and the cutout portion 719c of the lock ring 719 is again projected.
Locking rubber (restricting member) 72 is used as an elastic member in order to prevent the bayonet connection from being disconnected in the same phase as j.
6 is provided on the main plate 71. This allows the lock ring 7
The rotation of 19 is restricted so that it can rotate only within the drive range (angle θ ₀ of the cutout 719d) restricted by the lock rubber 726.

That is, when the lock rubber 726 is not provided, the lock ring 719 has a wide driving range with respect to the main plate 71. This also allows the bayonet connection and the bayonet connection to be released, but the lock rubber 726
And the drive range is restricted to the angle θ ₀ , the outer diameter notch 719c cannot rotate to the same phase as the inner diameter protrusion 71j, thereby preventing the bayonet from coming off.

Here, the lock rubber 726 is pressed into a hole (not shown) of the base plate 71 and is planted. The tilting direction of the lock rubber 26 is regulated by enclosing a substantially half circumference of the outer periphery by a rear surface protruding ear 71a of the base plate 71 and a convex portion around the screw hole (self-tapping hole) 71L with respect to the base plate 71. Further, the yoke 727 is screwed to the base plate 71 and the
A lock rubber 726 is sandwiched between the yoke 727 and the second yoke 72 as shown in FIG. 7 (a schematic sectional view taken along the circumferential direction) to slightly charge the elasticity of the rubber to prevent the rubber from coming off. Thus, the lock rubber 726 is fixed to the base plate 71 without adding a screw or an adhesive.

Next, referring to FIGS. 9 and 10, the lock rubber 72
The contact position relationship between the lock ring 6 and the lock ring 719 and the drive range of the lock ring 719 will be described. 9 and 10
7 is a schematic view in which only essential parts are extracted from the plane part of FIG. 7, and the shape and layout are slightly changed from the actual assembled state for easy understanding.

FIG. 9 is a plan view showing a locked state. In the figure, the lock ring 719 is urged clockwise by a lock spring 728, but the lock rubber 726 is in contact with the side 719i of the lock ring 719 to prevent rotation. Since the lock ring 719 is made of rubber separate from the base plate 71, the lock ring 719 is elastically restrained so as to absorb a shock at the time of locking and not to generate a loud noise. The contact side 719i of the lock rubber 726 is provided near the coil 720. The vicinity of the coil 720 is a portion where the mass is concentrated in the lock ring 719, and has the largest inertial force when the lock ring 719 rotates.

When the hook 719e is stopped from rotating, the lock ring 719 is deformed because it is separated from the coil 720. Due to this deformation, the sound quality at the time of impact at the time of locking is poor,
It becomes uncomfortable and the lock ring 719 is more likely to come off than the main plate 71 (because of the patchon connection). Therefore, in the present invention, the lock ring 719 is elastically prevented from rotating near the coil 720 and has a buffering action, and the lock ring 719 is not deformed at the time of locking by receiving at the mass concentration point, and the noise at the time of locking is generated. Is small and the sound quality is good.

The bayonet connection is stronger than the patchon connection, and since the lock ring 719 is not deformed, the lock ring 719 does not come off from the main plate 71. The lock ring 719 is driven in the locking direction and the unlocking direction, but this driving is restricted, and a sound when the locking ring 719 is stopped is generated in both directions.

However, immediately before the end of driving in the unlocking direction, the armature 724 is first moved to the suction yoke 72.
9 makes contact with a weak force (due to the elastic force of the armature spring 723), at which time a small metallic sound is produced, but thereafter, no sound is generated at the end of driving due to the elasticity of the armature spring 723. Further, since the above-mentioned metal sound is also generated in synchronization with the release operation of the photographer (when the image stabilizing system is turned on), the photographer has little discomfort. As described above, the noise generated when locking is reduced.

In this embodiment, as described above, the lock rubber 7
26 is provided so as to abut the lock ring 719 near the coil 720. As described above, in the present embodiment, (A1) the lock ring 7 having the biasing spring in the locking direction.
19 (A2) Lock direction (clockwise direction) with respect to the main plate 71
(A3) Then, rotate it in the unlocking direction to connect the bayonet and lock it with the lock rubber.

By capturing the above three configurations, (B1) the lock ring can be stably coupled to the main plate with a simple bayonet retaining structure, and (B2) the noise generated at the time of locking can be suppressed to a low level. B3) Further, by disposing the lock rubber in the vicinity of the coil, the deformation of the lock ring is prevented and the sound quality generated at the time of locking is not deteriorated. And so on.

The lock rubber 726 according to the present invention is also characterized in that it serves as a stopper when the lock ring 719 is unlocked.

In FIG. 10, the lock ring 719 rotates in the unlock direction and the armature 724 attracts the attraction yoke 729.
It is a schematic diagram at the moment of contact with. At this time, the lock rubber 72
The clearance between the outer periphery of the lock ring 6 and the side 719j of the lock ring is θ ₂ , and the lock ring ear 719a and the armature 724
Is defined as φ (driving allowance for equalizing the armature 724 to the suction yoke 729), θ ₂ <φ.

[0056] That side 719j is not the state condition of FIG. 10 from (driving allowance the used-up state) when until the driving angle of the lock ring 719 and theta ₁ of theta ₁ -.phi in FIG 9 <θ ₀ <θ ₁ Have a relationship.

As a result, even if the lock ring 719 continues to be driven in the unlocking direction in the state of FIG. 10, it is better that the lock rubber 726 elastically abuts the side 719j than the lock ring ear 719a presses the armature 724. Because of the speed, the armature 724 is reliably attracted to the attraction yoke 729.

As described above, the stopper is used to restrict the rotation in both directions, and the stopper is formed by one elastic means, and the stopper is fixed only by being sandwiched between the parts of the member. Since the stopper is also used, the assembling workability is good, there is no unpleasant sound during operation, a stable mechanism and a locking device (locking device) that reliably operates are obtained.

The mechanical parts of the lens barrel described above are roughly classified into a lens 74, a support frame 75, and coils 76p and 76.
y, IRED 77p, 77y, support balls 79a, 79b, charge spring 710, and support shaft 711 constitute one element of an optical holding means (correction means) for eccentricizing the optical axis, and a main plate 71, a second yoke 72, and a permanent magnet 73. , The first yoke 712 constitutes one element of the supporting means for supporting the correcting means,
18, lock ring 719, coil spring 720, armature shaft 721, armature rubber 722, armature spring 723, armature 724, yoke 727, lock spring 728, suction yoke 729, suction coil 730
Constitutes one element of the locking means for locking the correction means. Armature 724, yoke 729, coil 730
Constitutes one element of the holding unit. Armature shaft 72
1. Armature rubber 722, armature spring 723
Constitutes one element of the equalizing means.

Next, returning to FIG. 1, I on the hard substrate 715
C731p and 731y are position detecting elements 78p and 78, respectively.
This is an IC for amplifying the output of y. FIG. 12 is an explanatory diagram of the internal configuration (ICs 731p and 731y have the same configuration.
Here, only the IC 731p is shown. ).

In the figure, the current-voltage conversion amplifier 73
1ap and 731bp are photocurrents 7 generated by the light projecting element 77p in the position detecting element 78p (comprising resistors R ₁ and R ₂ ).
8 _i1p and 78 _i2p are converted into voltages. Differential amplifier 7
31cp is each current-voltage conversion amplifier 731ap, 731
The difference output of bp is obtained and amplified.

Light emitted from the light projecting elements 77p and 77y enters the position detecting elements 78p and 78y via the slits 75ap and 75ay as described above. When the support frame 75 moves in a plane perpendicular to the optical axis, the position detection elements 78p,
The position of incidence on 78y changes. The position detecting element 78p has sensitivity in the direction of the arrow 78ap, and
ap is a direction orthogonal to the arrow 78ap (78ay direction).
The light beam spreads out in the direction of arrow 78ap, and the light beam is narrowed in the direction of arrow 78ap.

Therefore, only when the support frame 75 moves in the direction of the arrow _713p , the photocurrents 78 _i1p , 7 of the position detecting element 78p are _obtained .
The balance of 8 _i2p changes, and the differential amplifier 731 cp outputs according to the direction of the arrow 713 p of the support frame 75. The position detection element 78y has a detection sensitivity in the direction of the arrow 78ay,
The slit 75ay is in a direction (7
8 ap direction), the support frame 75 has an arrow 7
The position detection element 78y changes the output only when it moves in the 13y direction.

The addition amplifier 731dp obtains the sum of the outputs of the current-voltage conversion amplifiers 731ap and 731bp (total amount of light received by the position detection element 78p), and the drive amplifier 731ap receiving this signal drives the light projecting element 77p accordingly.

Since the light projecting element 76p extremely unstablely changes its light projecting amount due to temperature or the like, the absolute values 78 _i1p +78 _{i2p of the} photocurrents 78 _i1p and 78 _i2p of the position detecting devices 78p and 78y change accordingly. To do. Therefore, the differential amplifier 731c which is 78 _i1p −78 _i2p indicating the position of the support frame 75
The output of p also changes.

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

The coils 76p and 76y in FIG. 1 are permanent magnets 7.
3. The support frame 75 is located in a closed magnetic path formed by the first yoke 712 and the second yoke 72, and is driven in the direction of an arrow 713p by passing a current through the coil 76p. (Rule) By passing a current through the coil 76y, the support frame 75 is driven in the direction of the arrow 713y.

Generally, the outputs of the position detecting elements 78p and 78y are amplified by the ICs 731p and 731y, and when the coils 76p and 76y are driven by the outputs, the support frame 75 is driven to change the outputs of the position detecting elements 78p and 78y. Become. Here, when the driving direction (polarity) of the coils 76p and 76y is set to a direction in which the outputs of the position detecting elements 78p and 78y become smaller (negative feedback), the outputs of the position detecting elements 78p and 78y are substantially reduced by the driving force of the coils 76p and 76y. The support frame 75 is stabilized at the position where it becomes zero.

In this way, the output from the position detecting elements 78p and 78y is negatively fed back to drive (herein, referred to as a position control method). For example, a target value (for example, a camera shake angle signal) is externally supplied to the ICs 731p and 731y. , The support frame 75 drives extremely faithfully according to the target value.

Actually, the differential amplifiers 731cp and 731c
The output of y is sent to the main substrate (not shown) via the flexible substrate 716, where analog-digital conversion (A / D conversion) is performed and the result is captured by the microcomputer. In the microcomputer, the signal is appropriately compared and amplified with a target value (camera shake angle signal), phase-compensated by a digital filter method (to make position control more stable), and then passed through the flexible substrate 716 again to the IC 732 (the coils 76p and 76).
y drive).

The IC 732 performs PWM (pulse width modulation) driving of the coils 76p and 76y based on the input signal,
The support frame 75 is driven. The support frame 75 is indicated by arrows 713p and 7
It is slidable in the 13y direction, and the position is stabilized by the position control method described above. Incidentally, in a consumer optical device such as a camera, the support frame 75 is always used from the viewpoint of preventing power consumption.
Is not controlled. Since the support frame 75 can freely move around in the plane orthogonal to the optical axis in the non-controlled state, the following measures should be taken against the sound generation and damage of the collision at the stroke end at that time. ing.

As shown in FIGS. 6 to 10, three protrusions 75f radially protruding are provided on the back surface of the support frame 75, and as shown in FIG. 7 or 9, the tip of the protrusion 75f has a mechanical lock ring 719. Is fitted to the inner peripheral surface 719g.
As a result, the support frame 75 is constrained with respect to the main plate 71 in all directions.

FIG. 13 is a timing chart of the mechanical lock ring drive, in which the coil 720 is energized by the arrow 719i (PWM drive shown by 720b) and the attraction magnet 730 is also energized (730a). Therefore, the armature 724 abuts the suction yoke 729, and when the armature 724 is equalized, the armature 724 is sucked by the suction yoke.

Next, when the coil 720 is de-energized at the time indicated by 720c, the lock ring 719 is locked by the lock spring 72.
Although it tries to rotate clockwise by the force of 8, the rotation is restricted because the armature 724 is attracted to the attraction yoke 729 as described above. At this time, the protrusion 75 of the support frame 75
f is at a position facing the cam 719f (cam 719f
Is rotating), the support frame has a projection 75f and a cam 719.
Only the clearance between f can move.

Therefore, the support frame 75 is dropped in the direction of gravity G, but the support frame 75 is also in the control state at the time of the arrow 719i in FIG. 13, and therefore is not dropped. The support frame 75 is restrained by the inner circumference of the lock ring 719 during non-control, but actually has a play corresponding to the fitting play between the projection 75f and the inner peripheral wall 719g. In other words, the support frame 75 falls downward in the direction of gravity by the amount of the play, and the center of the support frame 75 and the center of the main plate 71 are shifted. Therefore, from the time of the arrow 719i, for example, control is performed to spend one second and slowly move to the center of the main plate (the center of the optical axis).

When this is rapidly moved to the center, the lens 7
This is because the photographer feels the image shake through 4 and is uncomfortable, so that the image deterioration due to the movement of the support frame 75 does not occur even if the exposure is performed during this (for example, in 1/8 seconds). The support frame is moved by 5 μm). Specifically, the outputs of the position detection elements 78p and 78y at the time point of the arrow 719i are stored, and the control of the support frame 75 is started with the values as the target values, and then 1
It spends a second and moves to the target value at the center of the preset optical axis (75 g). After the lock ring 719 is rotated (unlocked state), the support frame 75 is driven based on the target value from the vibration detection means (overlapping with the above-described movement of the center position of the support frame) to start the image stabilization. become.

If the image stabilization is turned off at the time of arrow 719j to end the image stabilization here, the target value from the vibration detecting means is not input to this apparatus, and the support frame 75 is controlled to the center position and stops. At this time, the power supply to the suction coil 730 is stopped (730b). Then, the suction force of the armature 724 of the suction yoke 729 is lost, and the lock ring 719 is rotated clockwise by the lock spring 728 to return to the state of FIG. At this time, the lock ring 719 becomes the stopper pin 7
The rotation is regulated by abutting against 26. After that (eg 20ms
After ec) The control of the present device is cut off, and the timing chart of FIG. 13 ends.

FIG. 14 is a block diagram showing the outline of the image stabilization system. In FIG. 14, reference numeral 91 is a vibration detection means, which is composed of a shake detection sensor for detecting an angular velocity of a vibration gyro and the like, and a sensor output calculation means for cutting the DC component of the shake detection sensor output and then integrating it to obtain an angular displacement. It

The angular displacement signal from the vibration detecting means 91 is input to the target value setting means 92. This target value setting means 9
2 is a variable differential amplifier 92a and a sample hold circuit 92
Since the sample-hold circuit 92b is always sampling, the two signals input to the variable differential amplifier 92a are always equal and the output is zero. However, when the sample-and-hold circuit 92b is put into a hold state by 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 amplification factor of the movable differential amplifier 92a is variable by the output of the image stabilization sensitivity setting means 94. The reason is that the target value signal of the target value setting means 92 is a target value (command signal) for causing the correction means to follow, but the correction amount of the image plane (the image stabilization sensitivity) with respect to the driving amount of the correction means is zoom and focus. This is to compensate for the change in the image stabilization sensitivity because it changes depending on the optical characteristics based on the change in focus. Therefore, the image stabilization sensitivity setting unit 94 receives the zoom (focal length) information from the zoom information output unit 95 and the focus (distance) information based on the distance measurement information of the exposure preparation unit 96, and the image stabilization based on the information. The sensitivity is calculated or the image stabilization sensitivity information preset based on the information is extracted to change the amplification factor of the variable differential amplifier 92a of the target value setting means 92.

The correction driving means 97 is ICs 731p, 731y732 mounted on the hard board 715, and the target value from the target value setting means 92 is input as a command signal. The correction starting means 98 is provided for the IC 7 on the hard board 715.
32 is a switch that controls the connection between the coil 32 and the coils 76p and 76y. Normally, by connecting the switch 98a to the terminal 98c, both ends of the coils 76p and 76y are short-circuited, and the signal of the logical product means 99 is output. Is input, the switch 98a is connected to the terminal 98b, and the correction unit 910 is in the control state (the shake correction is not performed yet, but the coils 76p,
Power is supplied to 76y, and the correcting means 910 is stabilized at a position where the signals of the position detecting elements 78p and 78y become substantially zero.)

At the same time, the output signal of the logical product means 99 is also input to the locking means 914, which causes the locking means to unlock the correction means 910. The correction means 910 inputs the position signals of the position detection elements 78p and 78y to the correction drive means 97 to perform the position control as described above. When both signals of the release half-press SW1 signal of the release means 911 and the output signal of the image stabilization switching means 912 are input to the logical product means 99, the AND gate 99a as a component thereof outputs a signal. That is, the anti-shake switching means 9
When the photographer operates the image stabilization switch 12 and presses the release halfway with the release means 911, the correction means 91
0 is unlocked and enters the control state.

The SW1 signal of the release means 911 is input to the exposure preparation means 96, which performs photometry, distance measurement, and lens focusing drive, and outputs focus information to the image stabilization sensitivity setting means 94 as described above. The delay means 93 is the logical product means 9
In response to the output signal of 9, the output is made, for example, one second later, and the target value signal is output from the target value setting means 92 as described above.

Although not shown, the vibration detecting means 91 also starts to operate in synchronization with the SW1 signal of the release means 911. As described above, the sensor output calculation including a large time constant circuit such as an integrator requires a certain amount of time from the start to the stable output. The delay means 93 is the vibration detection means 91.
After waiting until the output of the output signal S1 is stabilized, it plays the role of outputting the target value signal to the correction unit 910, and the image stabilization is started after the output of the vibration detection unit 91 is stable.

The exposure means 913 performs the mirror-up by the release push-off SW2 signal input of the release means 911, opens and closes the shutter at the shutter speed obtained based on the photometric value of the exposure preparation means 96 to perform the exposure, and the mirror-down. Then, the shooting ends. After the photographing is completed, when the photographer releases his hand from the release unit 911 and turns off the SW1 signal, the AND unit 99 stops the output, and the sample and hold circuit 92b of the target value setting unit 92 enters a sampling state.
The output of the variable differential amplifier 92a becomes zero. Therefore, the correction means 910 returns to the control state in which the correction driving is stopped.

Since the output of the logical product means 99 is turned off, the locking means 914 locks the correction means 910, and then the switch 98a of the correction starting means 98 is connected to the terminal 98c, and the correction means 910 is controlled. It will not be done. The vibration detecting means 91 is operated by a timer (not shown).
The operation continues for a certain period of time (for example, 5 seconds) after the operation 1 is stopped, and then stops. This is because the photographer often continues to perform the release operation after stopping the release operation, so that it is possible to prevent the vibration detecting means 91 from being activated each time at such a time, and to shorten the waiting time until the output is stabilized. Therefore, when the vibration detecting means 91 is already activated, the vibration detecting means 91 sends an activated signal to the delay means 93 to shorten the delay time.

As described above, in this embodiment, the locking portion (lock ring 719) of the locking means is bayonet-coupled with the ground plate 71 of the ground plate portion (supporting means), and the locking portion (lock ring 719) is locked. Turn in the direction (locking direction)
1 is inserted, rotated in the unlocking direction (unlocking direction) to join the bayonet, and the elastic means (lock rubber 726) prevents the bayonet from coming off, resulting in good assembly.
A stable locking device with low operating noise is obtained.

Further, when the mass of the locking portion (lock ring 719) is concentrated (electromagnetic driving means for driving the locking portion: coil 720) is received by the restricting member (lock rubber 726), it is generated during operation. A stable locking device is obtained by preventing deterioration of sound quality and deformation of the locking portion (lock ring 719) during operation. In addition, since the limiting means (lock rubber 726) is fixed by being sandwiched between the fixing part (support means: second yoke 72) and the electromagnetic driving means (yoke 727) for driving the locking part, the assembling workability is improved. I have a good locking device.

Further, by restricting the driving range of the locking portion (lock ring 719) in both the locking direction (locking direction) and the non-locking direction (unlocking direction), a reliable locking and unlocking operation is performed. In particular, the holding portion (the armature 724 (iron piece), the attraction yoke 729 (electromagnet), the attraction coil 730, which holds the locking portion (lock ring 719) in the unlocked state (unlocked state) can be realized. (Equipment) to reduce the drive allowance of the locking portion (lock ring 719) for operating the equalizing means (armature shaft 721, armature rubber 722, armature spring 723) for adjusting the contact positions of the iron piece and the electromagnet. A good locking device is obtained by elastically restricting the drive range of the locking portion in the direction by the elastic portion (lock rubber 726).

An optical image including the above-mentioned lens barrel is used to form an object image (image) on a predetermined surface (photosensitive surface).

FIG. 20 is a partial sectional view of a part of the second embodiment of the present invention. In the present embodiment, a part 712g of the first yoke 712 is bent toward the hard substrate 715 side, and the hard substrate 715 and the first yoke 712 are contacted with each other at the plate thickness surface (thickness end face) 712h of the bent portion at this time. They are in contact with each other and are electrically connected. Here, the reason why the hard substrate 715 is brought into contact with the surface of the plate thickness is that the convex portion changes into a step shape.
This is to prevent the mounting area on the substrate from being restricted due to the gradual change of the convex portion like the shoulder 712f in FIG.

In the hard substrate 715, the portion of the plate thickness t ₁ becomes a conductor pattern and a circuit cannot be mounted, but the range 715 of the hard substrate 715 on the opposite side of the bent portion 712g.
A circuit can be freely mounted on e. That is, the hole 712
By not bending the entire circumference of b, but bending it partially, it is possible to eliminate restrictions on mounting in parts other than the bent part.
The board is compact.

[0093]

According to the present invention, by setting each element as described above, a metal plate for electronic drive adjacent to a hard substrate on which electronic components are mounted is provided in a lens barrel used for optical equipment. A board mounting device and a lens using the same, which can be easily mounted by using a protrusion (projection) or a recess provided on a metal plate by embossing, and which can stably operate an electronic circuit on the board. A lens barrel can be achieved.

Particularly according to the present invention, the substrate (hard substrate 7
15) and the metal plate thickness end surface (plate) of the half-blanked part (embossed part 712c) in which the metal plate (first yoke 712) is projected to the substrate side from the metal plate or the bent part (712g) bent to the substrate side. By making the thick surfaces 712h) abut and join each other, the board and the metal plate do not come into contact with each other except the abutting surface, thereby improving the reliability of the mounting circuit on the board and further a dedicated member for mounting. Since it is not necessary, it is easy to install, and the mounting area of the board is effectively used to make the board compact.

Further, a conductor pattern (715d) is provided on the contact surface (712d) of the metal plate (first yoke 712) of the substrate (hard substrate 715) to electrically connect the metal plate and the substrate.
By grounding the metal plate, the mounted circuit on the board is always operating stably. Further, the workability is improved by fastening the substrate (hard substrate 715) and the metal plate (first yoke 712) together with the supporting means (base plate 71).

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a part of FIG. 1;

FIG. 3 is an explanatory view of a part of FIG. 2;

FIG. 4 is a plan view of an essential part when viewed from a direction of an arrow 79c in FIG. 3;

FIG. 5 is a perspective view of a main part of a part of FIG. 1;

FIG. 6 is a perspective view of a main part of a part of FIG. 1;

FIG. 7 is a plan view of a main part of a part of FIG. 1;

FIG. 8 is a perspective view of a main part of a part of FIG. 1;

FIG. 9 is a plan view of a main part of a part of FIG. 1;

FIG. 10 is a plan view of a main part of a part of FIG. 1;

FIG. 11 is a sectional view of a main part of a part of FIG. 1;

FIG. 12 is an explanatory diagram of the first embodiment of the present invention.

FIG. 13 is an explanatory diagram of the first embodiment of the present invention.

FIG. 14 is a main block diagram of Embodiment 1 of the present invention.

15 is an enlarged explanatory view of a part of FIG.

16 is a cross-sectional view taken along the line AA of FIG.

FIG. 17 is an enlarged explanatory view of a part of FIG.

FIG. 18 is a reference diagram for explaining the structural advantages of the present invention.

FIG. 19 is a reference diagram for explaining the structural advantages of the present invention.

FIG. 20 is a partial cross-sectional view of a part of the second embodiment of the present invention.

[Explanation of symbols]

 71 Base plate (supporting means) 72 Second yoke 73, 718 Permanent magnet 712 First yoke (metal substrate) 719 Lock ring (locking part) 727 Yoke 75 Supporting frame (optical holding means) 726 Elastic means (restricting member) 715 Hard Substrate 712c Projection 712g Bent 712d, 712h Contact surface 715d Conductive pattern

Claims (6)

[Claims] 1. A substrate and a metal plate adjacent to the substrate are provided with a half-blank portion protruding from a part of the metal plate on the substrate side, and the half-blank portion is brought into contact with the substrate by a coupling means. A board mounting device characterized by being connected. 2. A bent portion is formed by bending a substrate and a metal plate adjacent to the substrate on a part of the metal plate on the substrate side, and a thickness end face of the metal plate of the bent portion is formed on the substrate. A board mounting device characterized in that the board mounting device is brought into contact with and is joined by a joining means. 3. A conductive pattern is provided on a contact surface of the substrate with the metal plate, and the metal plate is brought into contact with the conductive pattern to conduct electricity.
Or the board mounting device of 2. 4. The board mounting device according to claim 1, wherein the metal plate and a supporting means for supporting the board are fastened together on the contact surface of the board with the metal plate. 5. A lens barrel comprising the board mounting device according to claim 1 housed and held in a housing. 6. An optical device, wherein an image is formed on a predetermined surface by using the lens barrel according to claim 5.