JP2015106037A - Electromagnetic actuator and blade driving device for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent interference between a terminal and other parts, damage, or the like by improving assembling workability, while achieving reduction in size, thickness, and cost, in an electromagnetic actuator.SOLUTION: In the electromagnetic actuator including a rotor 50 including a permanent magnet and an output part, an upper frame 60 freely rotatably supporting the upper end of the rotary shaft 51 of the rotor, a lower frame 70 detachably connected to the upper frame, to freely rotatably support the lower end of the rotary shaft of the rotor and including an attachment part 77 attached to another member, a coil for excitation 80 wound around the upper frame and the lower frame, and a cylindrical yoke 90 arranged around the coil, the lower frame 70 includes two terminals 75 and 75 around which both ends of the coil are wound. Thus, the interference between the terminal and other parts, the damage, or the like can be prevented by improving the assembling workability, while achieving the reduction in size, thickness and cost.

Description

  The present invention relates to an electromagnetic actuator having a rotor that rotates within a predetermined angle range and a blade driving device for a camera, and in particular, driving for driving blade members such as a shutter blade, a diaphragm blade, an ND filter blade, and a barrier blade of a camera. The present invention relates to an electromagnetic actuator used as a source and a blade driving device for a camera using the same.

As a conventional electromagnetic actuator, a rotor (rotor) having a permanent magnet and an output pin, a first coil frame (upper frame) and a second coil frame (lower frame) for rotatably supporting the rotor, a first coil An exciting coil wound around the frame and the second coil frame, a cylindrical yoke fitted around the first coil frame, a plurality of magnetic rods fitted into the first coil frame, etc. And is fixed to a ground plane having an optical path opening by snap fitting (see, for example, Patent Document 1).
By the way, in this electromagnetic actuator, both ends (lead wires) of the coil need to be electrically connected to a printed wiring board or the like, and in general, a metal is projected so as to protrude upward from the first coil frame (upper frame). Two terminal pins made (or embedded) made of metal, and both ends (lead wires) of the coil are connected (wrapped) to these two terminal pins, and then electrically connected to the printed wiring board. ing.

However, in this electromagnetic actuator, since the two terminal pins are attached so as to protrude upward from the first coil frame (upper frame), the blade members of the camera (shutter blades, diaphragm blades, ND filter blades, barriers) When a camera blade drive device (the base plate) is fixed as a drive source for driving a blade, the terminal pin protrudes from other components, and the camera blade drive device is made thinner. Was difficult.
Further, when the camera blade drive device equipped with this electromagnetic actuator is further assembled to the camera casing (or lens barrel), there is a risk that the terminal pin may interfere with other parts and be damaged in the assembly process. There was also a need to improve assembly.
Furthermore, in the configuration employing expensive metal terminal pins arranged so as to protrude from the first coil frame (upper frame), there is a limit to the reduction in size and cost required as an electromagnetic actuator. there were.

JP 2005-283877 A

  The present invention has been made in view of the above circumstances, and its object is to improve the assembly workability while simplifying the structure, reducing the size, reducing the thickness, and reducing the cost. Another object of the present invention is to provide an electromagnetic actuator capable of preventing interference and breakage between components (particularly terminals and other components), and to provide a blade driving device for a camera provided with this electromagnetic actuator.

An electromagnetic actuator according to the present invention includes a rotor having a permanent magnet and an output portion, an upper frame that rotatably supports an upper end portion of a rotating shaft of the rotor, and a lower end of the rotating shaft of the rotor that is detachably coupled to the upper frame. A lower frame having a mounting portion that rotatably supports the portion and attached to another member, an excitation coil wound around the upper frame and the lower frame, and arranged around the coil An electromagnetic actuator including a cylindrical yoke, wherein the lower frame has two terminals around which both ends of the coil are wound.
According to this configuration, the two actuators wind the end of the coil to the lower frame on the side where the electromagnetic actuator is attached to another member (for example, a substrate that supports the blade member in the blade driving device for a camera). By providing the terminal, the height dimension of the electromagnetic actuator (dimension in the rotor rotation axis direction) can be reduced compared to the case where the terminal is provided on the upper frame so as to protrude upward in the rotor rotation axis direction as in the prior art. It can be kept low, and downsizing and thinning can be achieved.

In the electromagnetic actuator having the above-described configuration, it is possible to adopt a configuration in which the terminal is formed integrally with the lower frame using a resin material.
According to this configuration, since the two terminals are integrally formed of the resin material together with the lower frame, the number of parts can be reduced and the cost can be reduced as compared with the case of using a metal terminal pin as in the past. In addition, it is possible to reduce the number of work steps such as attaching terminal pins, and the manufacturing process can be simplified.

In the electromagnetic actuator having the above-described configuration, it is possible to adopt a configuration in which the terminal is formed so as to protrude in a direction perpendicular to the rotation axis of the rotor.
According to this configuration, when the attachment portion of the lower frame is formed in a flange shape wider than the upper frame, it is formed so as to protrude from the outer surface (in a direction perpendicular to the rotation axis of the rotor). As a result, the space above the lower frame can be made free, and when there is a part that moves forward and backward with respect to this region, the electromagnetic actuator (or electromagnetic) is prevented while preventing interference with the part. Camera blade drive devices that employ actuators as drive sources can be centrally arranged in a mounting object (for example, in a camera casing or a lens barrel).

In the electromagnetic actuator having the above-described configuration, it is possible to adopt a configuration in which the lower frame has a guide portion that guides the lead portion of the coil guided to the terminal.
According to this configuration, when winding both ends of the coil around the terminal (using an automatic coil winding machine or the like) with the coil wound around the upper frame and the lower frame, the lead portion is guided to the guide portion. By guiding in (3), the lead portion can be reliably wound around the terminal while restricting the lead portion from being loosened by the centrifugal force (inertial force) or the like and deviating from the lower frame.

The camera blade drive device of the present invention includes a substrate having an opening for an optical path, a blade member supported by the substrate to move between a position facing the opening and a position retracted from the opening, and the blade member A drive source fixed to the base plate to drive the camera, wherein the drive source comprises any one of the electromagnetic actuators configured as described above. It is a feature.
According to this configuration, by using the electromagnetic actuator having the above configuration, the assembly workability is improved while achieving the simplification, size reduction, thickness reduction, cost reduction, etc. Thus, it is possible to obtain a camera blade driving device that can prevent interference and breakage between the terminal and other components and can stably drive the blade member.

  According to the electromagnetic actuator having the above configuration, the assembly workability is improved while achieving simplification, downsizing, thinning, and cost reduction of the structure, and the parts (particularly terminals and other parts) For cameras that can prevent interference, breakage, etc., and can stably drive blade members while achieving downsizing, thickness reduction, cost reduction, etc. by using such an electromagnetic actuator as a drive source A blade drive device can be obtained.

It is a disassembled perspective view which shows one Embodiment of the blade drive device for cameras carrying the electromagnetic actuator which concerns on this invention. It is a disassembled perspective view which shows one Embodiment of the electromagnetic actuator which concerns on this invention. It is an external appearance perspective view of the electromagnetic actuator shown in FIG. It is an external appearance perspective view which shows the state which connected the wiring board with respect to the terminal of the electromagnetic actuator shown in FIG. 4A and 4B show the electromagnetic actuator shown in FIG. 4, where FIG. 4A is a top view and FIG. 4B is a longitudinal sectional view. FIG. 2 is a top view showing a state where a shutter blade as a blade member is located at a position retracted from an opening in the camera blade driving device shown in FIG. 1. FIG. 2 is a top view showing a state where a shutter blade as a blade member is located at a position facing an opening in the camera blade driving device shown in FIG. 1. FIG. 2 is a bottom view showing a state where a shutter blade as a blade member is located at a position retracted from an opening in the camera blade driving device shown in FIG. 1. FIG. 2 is a bottom view showing a state in which a shutter blade as a blade member is located at a position facing an opening in the camera blade driving device shown in FIG. 1.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the camera blade driving device according to this embodiment is fixed to a base plate 10 as a substrate having an optical path opening 10 a and a back side (lower side) of the base plate 10 at a predetermined interval. The back plate 20, the two partition plates 31 and 32 disposed between the base plate 10 and the back plate 20, a position that is rotatably supported by the base plate 10, and a position that faces the opening 10a and a position that retreats from the opening 10a Shutter blades 40 as blade members that move between them, and an electromagnetic actuator M (rotor 50, upper frame 60, lower frame) as a drive source fixed to the front side (upper side) of the base plate 10 to drive the shutter blades 40 70, an exciting coil 80, a cylindrical yoke 90, a plurality of magnetic pins 100), a wiring board 110 for electrically connecting the coil 80 included in the electromagnetic actuator M, and the like.

  As shown in FIGS. 1, 8, and 9, the base plate 10 includes an opening 10 a that forms a circular shape for an optical path, a fixing portion 10 b that fixes the electromagnetic actuator M (the lower frame 70), and an output portion of the rotor 50. The fan-shaped through hole 10c through which the drive pin 53 is movably moved, the supporting shafts 10d, 10e, 10f, and 10g that support the shutter blade 40 in a swingable manner, and the retracted position and the opening portion where the shutter blade 40 is retracted from the opening portion 10a. Stoppers 10h and 10i that stop at positions facing 10a, positioning projections 10j for positioning the back plate 20, latching portions 10k for assembling the back plate 20, and screw holes for screwing screws B to fasten the back plate 20, respectively 10 m, positioning projections for positioning the partition plates 30 and 30, and other projections are provided.

As shown in FIGS. 1, 8, and 9, the back plate 20 is formed so as to have substantially the same outer contour as the base plate 10, and has a circular opening 20a and a support shaft 10d having an inner diameter larger than the opening 10a. , 10e, 10f, 10g through holes 20d, 20e, 20f, 20g, stoppers 10h, 10i through holes (or notches) 20h, 20i, positioning projections 10j through holes 20j, and snaps to the latch 10k of the base plate 10 A latching piece 20k that is latched by fitting, a through hole 20m through which the screw B is passed, and other holes and notches are provided.
Then, after the two partition plates 31 and 32 and the shutter blades 40 are assembled, the back plate 20 is assembled to the base plate 10 so as to cover the whole, and fastened with screws B.

As shown in FIG. 1, the partition plate 31 is formed in a substantially disc shape, and has a circular opening 31 a that opens larger than the opening 10 a in a substantially central region, a fan-shaped through hole 31 c that passes the drive pin 53, and a support. Holes 31d, 31e, 31f, 31g through which the shafts 10d, 10e, 10f, 10g pass, holes (or notches) through which the stoppers 10h, 10i pass, other holes, notches, and the like are provided.
As shown in FIG. 1, the partition plate 32 is formed in a substantially disc shape, and is opened larger than the opening 10 a in a substantially central region and has an arcuate inner edge and a substantially V-shaped inner edge, and a drive pin 53. Fan-shaped through hole 32c through which the shaft passes, holes 32d, 32e, 32f, 32g through which the supporting shafts 10d, 10e, 10f, 10g pass, holes (or notches) through which the stoppers 10h, 10i pass, and other holes and notches ing.

As shown in FIGS. 1, 6 to 9, the shutter blade 40 includes a first shutter blade 41, a second shutter blade 42, a third shutter blade 43, and a fourth shutter blade 44.
The first shutter blade 41 is formed in a flat plate shape, and includes a circular hole 41a through which the support shaft 10d passes and a long hole 41b through which the drive pin 53 of the rotor 50 is coupled.
The second shutter blade 42 is formed in a flat plate shape, and includes a circular hole 42a through which the support shaft 10e passes and a long hole 42b through which the drive pin 53 of the rotor 50 is connected.
The third shutter blade 43 is formed in a flat plate shape and includes a circular hole 43a through which the support shaft 10f passes and a long hole 43b through which the drive pin 53 of the rotor 50 is connected.
The fourth shutter blade 44 is formed in a flat plate shape and includes a circular hole 44a through which the support shaft 10g passes and a long hole 44b through which the drive pin 53 of the rotor 50 is connected.
The first shutter blade 41, the second shutter blade 43, the third shutter blade 43, and the fourth shutter blade 44 are moved backward from the opening 10a by the rotational driving force of the electromagnetic actuator M (the rotor 50) ( It moves between an open position) and a position facing the opening 10a (closed position).

  As shown in FIGS. 2, 3, 4, 5 (a) and 5 (b), the electromagnetic actuator M includes a rotor 50 that rotates within a predetermined angular range, and an upper frame that rotatably supports the rotor 50. 60 and the lower frame 70, an exciting coil 80 wound around the upper frame 60 and the lower frame 70, a cylindrical yoke 90 disposed around the coil 80, around the rotor 50 and the yoke 90 Are provided with a plurality (four) of magnetic pins 100 and the like.

As shown in FIGS. 2 and 5 (b), the rotor 50 includes a rotating shaft 51, a permanent magnet 52 formed in a cylindrical shape around the rotating shaft 51 and magnetized in the N and S poles, and rotated to the outside. A drive pin 53 or the like as an output unit that outputs a driving force is provided.
The rotating shaft 51 and the drive pin 53 are integrally formed of a resin material or the like, and the permanent magnet 52 is fixed around the rotating shaft 51 or magnetized after being integrally formed to be a permanent magnet. is there.

  As shown in FIGS. 2, 5 (a) and 5 (b), the upper frame 60 is formed in a substantially cylindrical shape whose upper side is closed using a resin material, and the upper end portion of the rotating shaft 51 of the rotor 50. A bearing hole 61 that rotatably supports 51a, an abutment portion 62 that is fitted into and abuts on the concave receiving portion 72 of the lower frame 70, and a latch piece 63 that latches on the latch portion 73 of the lower frame 70. , A winding groove 64 around which the coil 80 is wound, a plurality of (here, six) fitting holes 65 into which the magnetic pins 100 are fitted, a notch 66 that allows the drive pin 53 to move, and a yoke 90 are fitted. An outer peripheral surface 67 and the like are provided.

  As shown in FIGS. 2, 3, 4, 5 (a) and 5 (b), the lower frame 70 is formed in a substantially flat flange shape using a resin material, and the rotation of the rotor 50 is performed. A bearing hole 71 that rotatably supports the lower end portion 51 b of the shaft 51, a concave receiving portion 72 that abuts the abutment portion 62 of the upper frame 60, and a latching portion 73 that latches the latching piece 63 of the upper frame 60. , A winding groove 74 for winding the coil 80, two terminals 75 and 75 for winding the end portions 81 and 82 of the coil 80, a notch portion 76 that allows the drive pin 53 to move, and a fixing portion 10b of the base plate 10. For example, a mounting portion 77 having a hole 77a through which the screw B is passed, and guide portions 78 and 78 for guiding the lead portions 81a and 82a of the coil 80 are provided.

The two terminals 75 and 75 are formed integrally with the lower frame 70 using a resin material, and are formed so as to protrude in a direction perpendicular to the rotation shaft 51 of the rotor 50.
Thus, by providing the two terminals 75, 75 on the lower frame 70, the electromagnetic actuator is compared with the conventional case where the terminals are provided on the upper frame so as to protrude upward in the rotation axis direction of the rotor. The height dimension (the dimension of the rotor 50 in the direction of the rotation axis 51) can be kept low, and downsizing, thinning, and the like can be achieved.
In addition, since the two terminals 75 and 75 are integrally formed of a resin material together with the lower frame 70, the number of parts can be reduced and the cost can be reduced as compared with the case where a metal terminal pin is used. Therefore, the conventional process such as mounting of terminal pins is not necessary, and the manufacturing process can be simplified.
Further, when the attachment portion 77 of the lower frame 70 is formed in a flange shape wider than the upper frame 60, the terminals 75, 75 are formed from the outer surface of the attachment portion 77 (in a direction perpendicular to the rotation shaft 51 of the rotor 50). In this case, the space above the lower frame 70 can be made free, and when there is a part that moves forward and backward with respect to this region, interference with that part is prevented. Can be prevented.

The guide portions 78, 78 serve to guide the lead portions 81 a, 82 a of the coil 80 led to the terminals 75, 75, and are formed to form protruding pieces that protrude from the side surfaces of the mounting portion 77. .
The guide portions 78 and 78 do not shift (sag) the lead portions 81a and 82a when the end portions 81 and 82 of the coil 80 are wound around the terminals 75 and 75 (using an automatic coil winding machine or the like). By guiding in this manner, the lead portions 81a and 82a are prevented from deviating from the lower frame 70 by centrifugal force (inertial force) or the like.

As shown in FIGS. 2, 3, 4, 5 (a) and 5 (b), the coil 80 combines the upper frame 60 and the lower frame 70 so as to rotatably support the rotor 50. Later, using an automatic coil winding machine or the like, in the winding grooves 64 and 74 of the upper frame 60 and the lower frame 70 (in the vertical direction so as to surround the upper end portion 51a and the lower end portion 51b of the rotating shaft 51 of the rotor 50) ) And the end portions 81 and 82 are led to the terminals 75 and 75, respectively, and wound.
In the winding operation of the end portions 81 and 82, the lead portions 81a and 82a are guided by the guide portions 78 and 78. Therefore, the lead portions 81a and 82a are loosened by the centrifugal force (inertial force) or the like and deviate from the lower frame 70. Can be reliably wound around the terminal.

  As shown in FIGS. 2, 3, 4, 5 (a) and 5 (b), the yoke 90 is formed in a cylindrical shape from a magnetic material, and the coil 80 is provided on the upper frame 60 and the lower frame 70. In the wound state, it is fitted into the outer peripheral surface 67 of the upper frame 60 so as to be arranged around the coil 80.

The plurality of (four) magnetic pins 100 are formed of a bar material such as iron, and the coil 80 is wound around the upper frame 60 and the lower frame 70 and the yoke 90 is fitted into the upper frame 60. The four fitting holes 65 appropriately selected among the six fitting holes 65 of the upper frame 60 are fitted.
The plurality (four) of magnetic pins 100 exert detent torque at the rotational end in one direction of the rotor 50 and the rotational end in the other direction.

As shown in FIGS. 2, 4, 5 (a), (b), the wiring board 110 is disposed on the front side (upper side) of the base plate 10, and the coil 80 (end portions 81, 82) of the electromagnetic actuator M. ) To electrically connect the two terminals 75 and 75 around which the end portions 81 and 82 of the coil 80 are wound and to be connected by soldering G, around the through hole and the through hole. Connection portions 111 and 111 including the arranged wiring are provided.
The wiring board 110 can be easily electrically connected by passing the terminals 75 and 75 around which the end portions 81 and 82 of the coil 80 are wound through the connecting portions 111 and 111 (through holes thereof) and then soldering them. It can be done.

Next, the assembly operation of the electromagnetic actuator and the assembly operation of the camera blade driving device will be described.
Here, the rotor 50, the upper frame 60, the lower frame 70, the coil 80, the yoke 90, the magnetic pin 100, the wiring board 110, and the like are prepared in advance. In addition, the base plate 10, the back plate 20, the two partition plates 31, 32, the shutter blades 40 (the first shutter blade 41, the second shutter blade 42, the third shutter blade 43, the fourth shutter blade 44) and the like are prepared. .

First, the rotor 50 is fitted so as to be rotatably supported by the upper frame 60 and the lower frame 70, and the upper frame 60 and the lower frame 70 are coupled by snap fit.
Subsequently, using an automatic coil winding machine or the like, the coil 80 is wound into the winding grooves 64 and 74 of the upper frame 60 and the lower frame 70, and the coil end portions 81 and 82 are further wound on the lower frame 70. Are wound around the two terminals 75,75. At this time, since the lead portions 81a and 82a are guided by the guide portions 78 and 78 and the slack or the like is restricted, the winding operation is smoothly performed.
Subsequently, the yoke 90 is fitted into the upper frame 60, and the plurality of magnetic pins 100 are fitted into the upper frame 60.
Subsequently, the two terminals 75 and 75 around which the end portions 81 and 82 of the coil 80 are wound are passed through the connection portions 111 and 111 of the wiring board 110, and thereafter, solder G is attached.
Thereby, the assembly work of the electromagnetic actuator M and the wiring board 110 is completed.

Further, a camera blade drive device is assembled using the electromagnetic actuator M as a drive source.
First, the electromagnetic actuator M (the lower frame 70) is attached to the fixing portion 10b on the front side (upper surface) of the main plate 10 using screws B.
Subsequently, one partition plate 31 is attached on the back side (lower surface) of the base plate 10.
Subsequently, the shutter blades 40 (the first shutter blade 41, the second shutter blade 42, the third shutter blade 43, and the fourth shutter blade 44) are arranged on the one partition plate 31 so as to be adjacent to the partition plate 31. Is attached.
Subsequently, another partition plate 32 is disposed and attached from above the shutter blades 40.
Finally, the back plate 20 is attached from above the partition plate 32 and fastened to the base plate 10 with screws B.
As described above, when assembling the apparatus, the components are assembled so as to be sequentially overlapped to complete the assembly of the apparatus, so that the assembling work can be easily performed.

  As described above, according to the blade driving device for a camera to which the electromagnetic actuator M is assembled, the two terminals 75 for winding the end portions 81 and 82 of the coil 80 to the lower frame 70 on the side attached to the base plate 10. , 75, the height dimension of the electromagnetic actuator M (in the direction of the rotating shaft 51 of the rotor 50) compared to the conventional case where the terminal is provided on the upper frame so as to protrude upward in the rotating shaft direction of the rotor. Therefore, the assembly workability is improved while achieving simplification, downsizing, thickness reduction, cost reduction, etc. of the structure, and the parts (particularly, terminals 75 and 75) are improved. Camera blade driving device employing the electromagnetic actuator M as a driving source, for example, in a camera housing or a lens barrel, and so on. It can be.

As described above, according to the electromagnetic actuator having the above-described configuration, the coil with respect to the lower frame 70 on the side where the electromagnetic actuator M is attached to another member (for example, the ground plate 10 of the camera blade driving device). By providing the two terminals 75 and 75 around which the end portions 81 and 82 of the 80 are wound, the height dimension of the electromagnetic actuator M (dimension in the direction of the rotating shaft 51 of the rotor 50) can be kept low. Can be achieved.
In addition, according to the camera blade drive device adopting the electromagnetic actuator M having the above configuration as a drive source, the assembly workability is improved while the structure is simplified, downsized, thinned, and the cost is reduced. Thus, the interference (particularly, the terminals 75 and 75 and other components), damage, and the like can be prevented, and the blade member (for example, the shutter blade 40) can be driven stably.

In the above embodiment, the case where the terminals 75, 75 protruding in the direction perpendicular to the rotation shaft 51 of the rotor 50 are provided on the lower frame 70 is not limited to this. If it is the structure which provides a terminal in a side frame, you may provide a terminal so that it may protrude in another direction.
Moreover, in the said embodiment, although the case where the terminals 75 and 75 were integrally formed with the same resin material with respect to the lower frame 70 formed with a resin material was shown, it is not limited to this. However, if the terminal is provided in the lower frame, a separate terminal may be attached to the lower frame.

  In the above embodiment, the shutter blade 40 that opens and closes the opening 10a is shown as a blade member included in the camera blade driving device and driven by the electromagnetic actuator. However, the present invention is not limited to this. A diaphragm blade that narrows the aperture 10a to a predetermined aperture, an ND filter blade that adjusts the amount of subject light passing through the opening 10a, or a barrier blade that opens and closes the front of the camera lens may be employed.

  As described above, the electromagnetic actuator of the present invention improves assembly workability while achieving simplification, downsizing, thickness reduction, cost reduction, etc. of the structure, and improves the assembly workability (particularly terminals and other components). Can be applied to a camera blade drive device as a drive source for driving a blade member of a digital camera, a film-type camera, etc., optical devices, other electronic devices, etc. It is also useful as a drive source.

10 Ground plane (board, another member)
10a Opening 10b Fixed part 20 Back plate 30 Partition plate 40 Shutter blade (blade member)
M Electromagnetic actuator (drive source)
50 Rotor 51 Rotating shaft 51a Upper end 51b Lower end 52 Permanent magnet 53 Drive pin (output unit)
60 Upper frame 61 Bearing hole 70 Lower frame 71 Bearing hole 75 Terminal 77 Mounting portion 78 Guide portion 80 Coil 81, 82 End portion 81a, 82a Lead portion 90 Yoke 100 Magnetic pin 110 Wiring board 111 Connection portion G Solder

Claims (5)

A rotor having a permanent magnet and an output portion, an upper frame that rotatably supports the upper end of the rotating shaft of the rotor, and a lower end of the rotating shaft of the rotor that is detachably coupled to the upper frame A lower frame having a mounting portion that is freely supported and attached to another member, an excitation coil that is wound around the upper frame and the lower frame, and a cylindrical shape that is disposed around the coil An electromagnetic actuator comprising:
The lower frame has two terminals for winding both ends of the coil.
An electromagnetic actuator characterized by that. The terminal is formed integrally with the lower frame using a resin material.
The electromagnetic actuator according to claim 1. The terminal is formed so as to protrude in a direction perpendicular to the rotation axis of the rotor.
The electromagnetic actuator according to claim 1, wherein the electromagnetic actuator is characterized in that The lower frame has a guide portion for guiding a lead portion of the coil guided to the terminal.
The electromagnetic actuator according to any one of claims 1 to 3, wherein A substrate having an opening for an optical path, a blade member supported by the substrate to move between a position facing the opening and a position retracted from the opening, and a base plate to drive the blade member A camera blade drive device comprising:
The drive source comprises an electromagnetic actuator according to any one of claims 1 to 4.
A blade drive device for a camera.

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