JPH0812818B2 - Aperture device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil bobbin device or diaphragm device used in an image pickup optical system of a video camera.

[0002]

2. Description of the Related Art FIG. 4 shows a terminal pin arrangement of a conventional coil bobbin.

FIG. 4 shows a state in which coil bobbins are combined, and 16 and 17 are coil bobbins and 16a and 1a.
6b is a terminal pin press-fitted and fixed to the coil bobbin 16 and 17a and 17b are respectively fixed to the coil bobbin 17, and ends of windings (coils) 18 and 19 are entwined. Figure 5
4 is a sectional view taken along line AA ′ of FIG.

[0004]

However, in the above-mentioned conventional example, when there is no space or the like, the terminal pin 16
The diameter of a, 16b (17a, 17b) must be minimized, and since the hole diameter of the coil bobbin 16 (17) into which the terminal pins 16a, 16b ... There are drawbacks such as breakage and other molding defects. In order to compensate for this drawback, it is necessary to secure the diameter of the terminal pin above a certain level, and to secure the thickness of the coil bobbin around the terminal pin in order to firmly support the terminal pin. Therefore, the distance in the l direction in FIG. 4 is increased, the space for winding the wire is sacrificed, and high torque, small size and light weight are hindered.

[0005]

According to the present invention, in the combined state of the coil bobbins, the terminal pins are arranged beyond the mating surface (symmetry axis) of the coil bobbins, and the terminal pins are arranged inside the opposing coil bobbins. By making it enter, the I dimension in FIG. 4 is shortened,
The coil bobbin device can be made smaller and lighter, and further, the coil bobbin and the coil support the terminal pins, so that the terminal pins can be firmly supported. According to the present invention, the first coil is wound on one side and the second coil is wound on the other side in the direction orthogonal to the axis of the rotor in the state where the coil bobbins are combined, and the first coil is wound. By arranging each terminal pin between the second coil and the second coil, the I dimension in FIG. 4 is shortened, the coil bobbin device is reduced in size and weight, and further, connection work to the terminal pin of both coils and The workability of connecting the terminal pin to another circuit device can be improved.

[0006]

1 to 3 show an embodiment of the present invention, and FIG. 3 shows an electric diaphragm device using the coil bobbin device of the embodiment. In FIG. 3, the pair of diaphragm blades 12 and 13 are housed and supported between the base plate 9 and the cover 14 so as to be movable in the plane direction. This movement is driven by the rotation of the drive arm 10. The motor as a drive source includes a rotor 7, a yoke 4, an insulating tape 8, control drive coils 5 and 6, a cap 3, a substrate 2, a printed circuit board 1.
And a rotor shaft 15 of which is a bearing shaft 9a of the main plate 1.
The shaft hole 3a is supported by
Is pivotally supported and is fitted into the center hole 10a of the drive arm 10.

Therefore, when the rotor 7 of the motor rotates, the drive arm 10 rotates against the return spring 11, and the diaphragm blades 12 and 13 move in the plane direction to restrict the diaphragm by a predetermined amount. FIG. 2 shows only the coil bobbin device in FIG.

FIG. 1 is a view showing a state in which coil bobbins are combined, and is a drawing best showing the features of the present invention.
5, 6 are coil bobbins, 20 is a drive coil, 21 is a braking coil, and 5a, 5b, 6a, 6b are coil bobbins 5, 6
Is a terminal pin attached to each of the. Terminal pin 5
The positions a, 5b, 6a, 6b are between the drive coil 20 wound on one side and the braking coil 21 wound on the other side in the direction orthogonal to the rotor shaft 15, and are denoted by Y in FIG.
In the direction, the terminal pins 5a and 5b enter the coil bobbin 6 side, the terminal pins 6a and 6b enter the coil bobbin 5 side beyond the distance center C / L when the coil bobbins 5 and 6 are combined, and in the X direction, One of the terminal pins (5b, 6a)
Is placed near the center point P, and the other (5a, 6b) is placed far away.

As described above, the terminal pins can be arranged so as to enter each other in the Y direction, and the size can be reduced by the distance M as compared with the conventional arrangement. In addition to the above placement conditions,
Since the coil bobbin shape which is point-symmetrical at the point P is realized, it is possible to use two coils in one set. Further, when the coil bobbins 5 and 6 are combined, the coil bobbins mutually support the roots of the terminal pins, so that the terminal pins 5a, 5b, 6a and 6b can be firmly supported.

[0010]

As described above, by arranging the terminal pins so as to extend over the mating surfaces of the coil bobbins, the distance in the I direction shown in FIG. 4 can be shortened and the diaphragm device can be shortened. Smaller size and lighter weight can be realized.
Furthermore, since the coil bobbin and the coil support the terminal pin, the terminal pin can be firmly supported. In addition, since the terminal pins are point-symmetrical with respect to the midpoint of the coil bobbin, the coil bobbin forming the set is of a single type, which is economical. Also, by arranging the terminal pin between the two coils, it is possible to reduce the size and weight of the diaphragm device, and at the same time connect the coil to the terminal pin or connect the terminal pin to another circuit device. You can improve your sex. In particular, it is important to reduce the size of the diaphragm device, and by arranging the terminal pins that effectively utilize the dead space near the axis of the rotor, it is possible to achieve the size reduction without adversely affecting others.

[Brief description of drawings]

FIG. 1 is a plan view of a coil bobbin device embodying the present invention.

FIG. 2 is an exploded perspective view of a coil bobbin device embodying the present invention.

FIG. 3 is an exploded perspective view of an electric diaphragm device embodying the present invention.

FIG. 4 is a plan view of a conventional coil bobbin device.

5 is a cross-sectional view taken along the line A-A ′ of FIG.

[Explanation of symbols]

 5, 6 coil bobbin 5a, 5b, 6a, 6b terminal pin 20, 21 coil

Claims (3)

[Claims] 1. A coil bobbin device, a coil wound around a coil bobbin of the coil bobbin device, a rotor rotatably supported in the coil bobbin device, and a diaphragm drive that rotates in response to rotation of the rotor. In a diaphragm device having at least a member and a plurality of diaphragm blades whose opening amount is varied by rotating the diaphragm driving member, the coil bobbin device is formed by combining two bobbins, and each coil bobbin is provided with the coil. A diaphragm device provided with a terminal pin to be connected, wherein the terminal pin is provided in a position in which two coil bobbins are aligned with each other in the direction of the other coil bobbin beyond the mating surface in a state where the two coil bobbins are aligned. 2. The diaphragm device according to claim 1, wherein the terminal pins of the coil bobbin device are arranged point-symmetrically with respect to the midpoint of the coil bobbin. 3. A coil bobbin device, a coil wound around a coil bobbin of the coil bobbin device, a rotor rotatably supported in the coil bobbin device, and a diaphragm drive member that moves by the rotation of the rotor. And a plurality of diaphragm members whose opening amount is changed by the movement of the diaphragm driving member, the coil bobbin device is formed by combining at least two coil bobbins,
The first coil is wound on one side in a direction orthogonal to the axis of the rotor in a state where a plurality of coil bobbins are combined,
A second coil is wound on the other side, and a first terminal pin to which the first coil is connected and the second coil are connected between the first coil and the second coil. Second
A diaphragm device in which the terminal pins of are arranged.