JPH0745426A - Rocking actuator - Google Patents

Abstract

PURPOSE:To improve workability of connection together with preventing coil disconnection by the external force and fixing a coil inside a holding frame at the time of molding. CONSTITUTION:A coil 7b is fitted to the positional pins 71a, 71b, 71c, and 71d inside a metal mold, and 72 is a slide mold, 72a and 72b are mold guide shafts. A coil 7b can be inserted by the positioning pins 71a, 71b, 71c, 71d inside resin with good accuracy and the holes or the recessed parts for positioning can be made in the coil inside diameter four corners in the parts after molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a swing actuator provided in an image shake correction device mounted on an optical device or the like.

[0002]

2. Description of the Related Art In conventional swing actuators,
As shown in FIG. 10, the coil 31 is adhered and fixed to the connect arm 32 which is a coil holding member, and the terminal treatment of the coil 31 is fixed on the holding member by some method or a flexible substrate. Was soldered to.

[0003]

However, in the above-mentioned conventional example, there are drawbacks in terms of time and structure cost of the bonding process, and soldering of the terminal causes a cost increase, and the terminal wire is not attached during the assembling work. There is a risk of disconnection due to being touched with a finger, and there is also a problem with respect to the reliability of stable coil and connection due to rocking.

The present invention has been made in order to solve the above-mentioned conventional problems, and it is possible to improve workability of connection, prevent coil breakage due to external force, and fix the coil in the holding frame at the time of molding with high accuracy. An object is to provide a swing actuator.

[0005]

In order to achieve the above-mentioned object, a swing actuator of the present invention includes a pair of yokes in a housing, permanent magnets fixed to at least one of the yokes, and the yokes and the permanent magnets. In the actuator including a movable coil that forms a magnetic gap from the movable coil and swings in the magnetic gap, the movable coil is integrally mold-inserted into a member that holds the movable coil, and the coil inner diameter portion of the holding member is formed. A recess or hole is provided for coil positioning during molding.

Then, the winding of the movable coil is completed,
The winding start end is joined to the terminal portion, and the terminal portion is molded in a plane parallel to the coil surface. When the thickness of the movable coil is substantially equal to the thickness of the mold member to be held, a mold portion is provided outside the magnetic gap from the inner peripheral portion of the coil to the outer peripheral portion so as to cover the coil and in the terminal portion direction. It is a thing.

[0007]

According to the present invention, since the coil is integrally molded in the mold, the bonding step can be eliminated, and the terminal wire is entangled with the terminal pin in the pre-insertion step and then soldered. Since it is embedded in the mold integrally, the wire can not be touched from the outside, disconnection can be prevented, and by providing a positioning part on the mold on the inner diameter of the coil, the coil can be accurately attached to the holding member. Can be integrated.

Further, by arranging the arrangement of the terminal pins on the plane parallel to the coil, the work for setting them in the mold and the simplification of the mold structure can be achieved. Also, the connection to the insert coil can be easily done by soldering the flexible board directly to the terminal pins that are out of the mold, without the need to separately fix the flexible board,
It is possible to reduce costs, increase reliability, improve accuracy of parts, and the like.

Further, when the thickness of the movable coil is substantially equal to the thickness of the mold member to be held, by providing a mold portion from the inner peripheral portion of the coil to the outer peripheral portion so as to cover the coil and in the direction of the terminal portion, When wiring the terminal wire from the inner circumference at the beginning of the coil to the terminal pin on the outer circumference of the coil, it is necessary to cross over the coil, and this terminal wire can also be stored in the mold. It cannot be touched completely from the outside, and it is possible to prevent coil breakage due to external force.

[0010]

1 is a perspective view of an image blur correction apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of a pitch side holding frame at the foremost portion and an actuator section shown in FIG. 1, and FIG. 2 is a cross-sectional view of the actuator portion in the perspective view of FIG. 2, (a) is a view of a cross section taken along a straight line A and a plane perpendicular to the IIIa direction as seen from the IIIa direction, and (b) is a straight line B, the IIIb direction. It is the figure which looked at the cross section in the surface which intersects perpendicularly at the direction of IIIb.

In FIGS. 1 to 3, reference numeral 7 is a pitch side connect arm in which a coil 7b and a terminal 7a are mold-inserted. 21 is a spacer housing, 9a,
It holds a yoke 9b and a magnet 22. The connecting frame 7 is screwed to the holding frame 4 by 7e, and is rotatable around the bearing 10b of the main barrel 10 and the rotating shafts 4a and 4b fitted to the bearing portion (not shown). . The dotted line on the left side of FIG. 3 particularly shows a state in which the coil portion in the gap oscillates around the rotating shafts 4a and 4b.
The holding frame 4 is integrally connected to the transparent flat plates 11 and 12 shown in FIG. 4, the fixed frames 1 and 2, the variable apex prism made of the film 5 and the liquid 13, and is also sandwiched by the holding frame 3 at the rear part. The rotation axes of the holding frames 3 and 4 have a 90 ° relationship.

Next, the holding frame 4 is rotated about the rotary shafts 4a and 4b to rotate the pitch side fixed frame, which is a fixed portion, and the change of the apex angle in the pitch direction is achieved. The coil 7b in the connect arm 7 screwed to the holding frame 4 is sandwiched by the yokes 9a and 9b and the magnet 22, and when the coil 7b is energized, an electromagnetic force is generated.
The holding frame 4 can be moved. Similarly, the yaw side can also move the yaw holding frame 3.

Next, the connect arm will be described. Since the coil 7b and the pin of the terminal 7a are set in the mold used for molding, it is advantageous to place them on the same plane from the viewpoint of shortening the setting time and workability. Therefore, the terminal 7a is arranged so as to avoid the magnet unit, that is, in a position other than the swinging direction and the swinging surface of the coil 7b, on a plane parallel to the surface of the coil 7b.

FIG. 5 is a view showing a state in which the coil 7b is fitted into the positioning pins 71a, 71b, 71c and 71d in the mold. Reference numeral 70 is a fixed type, and 72 is a slide type. The type 72 has a coil frame forming groove, a hole for a positioning pin, and a mold for a raised portion (not shown) for coil connection protection. 72
Reference numerals a and 72b are mold guide shafts. The positioning pin 71
The coils 7b can be accurately inserted into the resin by a, 71b, 71c, and 71d. Therefore, in the molded component, holes or recesses for positioning pins can be formed at the four corners of the coil inner diameter.

Next, regarding the coil, a self-bonding wire is used for the coil, for example, JISC 3202 polyurethane copper wire is used. However, in order to obtain higher reliability, a wire material of polyesterimide copper wire can be selected.

As shown in FIG. 3, 7b is provided above and below the coil.
The braking coil for driving ₁ and for detecting the speed 7b ₂ are double-wound with wires having different wire diameters. Here, setting the driving coil 7b ₁ closer to the magnet 22
In terms of the generated torque, it is advantageous because there is a leakage magnetic flux in the air gap, but when the peak of the gain of the frequency characteristics of the actuator is extremely high, the coil 7b for detection is reversely used.
_{If 2} is on the magnet side, the servo will work better and oscillation will be suppressed, which is advantageous.

At this time, in order to construct the double winding in a limited space-saving, particularly, the detection coil has a wire diameter smaller than that of the drive coil, and the ampere of the drive coil is used. Priority is given to the turn. However, in the case of simultaneous winding, it is desirable that the ratio of the two kinds of wire diameters is within about 1: 1 / √2 in order to reduce the difference in tension when winding and to prevent wire breakage.

However, this is not the case when the two types of coils are separately wound and used. Further, the wound coil is wound thicker than the final thickness after the insertion. Further, it is preferable in terms of molding that the thickness of the molded portion on the outer peripheral portion of the coil is substantially equal to the thickness of the coil, but it may be possible to use a different thickness for space reasons. Further, it is possible to use a coil only for driving instead of the above double winding for control reasons.

Next, regarding the lead wire between the coil and the terminal pin, FIGS. 6, 7 and 8 are sectional views of the insert coil.
In FIG. 6, 7g ₁ and 7g ₂ are gate positions, and 7h ₁ and 7g
h ₂ shows the relationship between the flow of resin and the lead wire 7i. The lead wire 7i is entangled with the terminal pin 7a and then soldered.

Further, FIG. 8 is the same as FIG. 6 except that the lead wires are radial from the coil portion. Further, FIG. 7 is the same as FIG. 8, but the length is changed in order from the pin on the front side of the coil. Other points are the same as in FIG.

Further, FIG. 6 shows that in the present embodiment, when the wires are drawn in a space-saving manner, especially by twisting the lead wires,
It is possible to prevent the wire from swinging and breaking in the mold, and it is also considered to further dip the soldered portion of the terminal pin with a resin or the like in advance for further reliability improvement. Therefore, the terminal pins can also be formed by using a lead frame that is a pressed sheet metal product. In addition, it is desirable to set the gate position so that the flow direction of the resin in the mold and the direction of the lead wire match, and by placing it at the opposite position as far as possible from the terminal pin, the resin temperature at the terminal pin position is low. The flow time of the resin is short, the pressure is low, and it is possible to prevent breakage of the wire and violence of the lead wire.

Further, 7b ₁ and 7b _{2 in} FIG. 5 are lead wires at the winding start end of the coil, and extend over the coil for wiring from the inner circumference of the coil to the terminal pin outside the coil. This crossing point is covered with a mold as shown in 7f of FIG. 3 so that this lead wire is housed in the mold and cannot be touched from the outside. Therefore, the portion 7f is thicker than the coil thickness and also serves as a passageway for the resin entering from the gate at the center of the coil.

In addition, FIG. 9 shows the left side of FIG. 3 in which a C chamfer is provided in the mold portion around the coil, and when the coil swings in the gap, the clearance dimension with respect to the upper and lower yokes and magnets. Therefore, the gap can be shortened.

[0024]

As described above, according to the present invention, the coil is integrally molded in the mold, and the recessed portion or hole for coil positioning at the time of molding is provided in the inner diameter portion of the coil of the molded holding member. The winding start and winding end ends are connected to the terminal pins, and the terminal pins are molded in a plane parallel to the coil surface to improve the workability of subsequent wiring or disconnection due to external force. The coil can be accurately fixed in the holding member and the workability at the time of molding can be made, and the terminal wire is not touched even after molding,
It is possible to make one that prevents disconnection.

[Brief description of drawings]

FIG. 1 is a perspective view of an image blur correction device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the swing actuator unit shown in FIG.

FIG. 3 is a cross-sectional view of the swing actuator unit in FIG.

4 is a cross-sectional view of the variable apex angle prism of FIG.

FIG. 5 is a diagram showing a state in which a coil of a swing actuator according to an embodiment of the present invention is fitted in a mold.

FIG. 6 is a cross-sectional view showing another embodiment of the swing actuator of the present invention.

FIG. 7 is a sectional view showing still another embodiment of the swing actuator of the present invention.

FIG. 8 is a sectional view showing still another embodiment of the swing actuator of the present invention.

FIG. 9 is a sectional view showing still another embodiment of the swing actuator of the present invention.

FIG. 10 is a perspective view showing an outline of a coil portion of a conventional swing actuator.

[Explanation of symbols]

 1 Yaw side fixed frame 2 Pitch side fixed frame 3 Yaw holding frame 4 Pitch holding frame 5 Film 6 Yaw side connect arm 7 Pitch side connect arm 8 Yoke 9 Yoke 10 Main barrel 21 Spacer housing 22 Magnet 31 Conventional coil 32 Conventional connect arm

Claims (3)

[Claims] 1. A coil characterized by being molded after being molded and wound around a coil positioning pin to be removed. 2. A coil which is molded in a wound state, and a terminal which is connected to a winding start end or a winding end end of the coil and is molded so that the arrangement direction is parallel to the coil surface of the coil. And a coil unit. 3. A coil, a coil holding member for holding the coil and having a thickness approximately equal to that of the coil, and a conductor extending between the inner peripheral portion and the outer peripheral portion of the coil. A coil unit having a mold part covering the coil unit.