JP2569839Y2 - Aperture device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a diaphragm device for a camera.

[0002]

2. Description of the Related Art A diaphragm device of a camera used for a video camera or the like drives a plurality of opening / closing members by a driving unit having a driving coil, a braking coil, a magnetic sensor, and the like.
The aperture is controlled. The aperture device and the controller of the camera are electrically connected by a connector.

FIG. 5 is a perspective view showing a schematic structure of such an aperture device E, which comprises a blade drive section 10 and an aperture section 50 driven to be opened and closed by the blade drive section 10.

The diaphragm unit 50 has a ground plate 51 on which the blade driving unit 10 is mounted.
A support 58 for fixing the support 8 is provided upright.

On the other hand, the blade driving unit 10 is provided with a hollow cylindrical iron-made magnetic circuit member (yoke) 35 in which a permanent magnet, a driving coil and a braking coil are housed. The coil terminal pin 29 of the braking coil penetrates to the upper surface of the printed wiring board 38, and the printed wiring board 3
8 is soldered to the wiring pattern.

The blade drive unit 10 and the control unit of the camera are connected to each other by a connector 37 fixed to the right end of the printed wiring board 38 by soldering.

[0007]

By the way, in the above-mentioned conventional structure, the drive coil 130A wound around the bobbin 25 as shown in FIG.
And the end of the braking coil 130B is wound and fixed. As shown in FIG. 6B, the connector 37 is fixed by soldering by penetrating the connector terminal pins 37a to the upper surface of the printed wiring board 38.

However, when the length L of the connector terminal pins 37a is long and the pitch P is narrow, there is a problem that solder is excessively attached between the connector terminal pins 37a and the pins 37a are short-circuited. This can be solved by performing a soldering operation after the pins 37a are cut short by hand, but each time the pins 37a are cut.
Must be cut off, which causes a problem of lowering the working efficiency.

Also, since the magnetic circuit member 35 is made of iron, it is heavier and more expensive than plastic.

Further, since the pin insertion holes 38a of the printed wiring board 38 into which the coil terminal pins 29 are inserted have a uniform inner diameter as shown in FIG. 6A, the coil terminal pins 29 are inserted into the insertion holes 38a. When the coils 130A, 130B are wound around the coil terminal pins 29, the outer peripheral surfaces of the coils 130A, 130B hit the inner wall surface of the insertion hole 38a.
There is a problem that 30B is disconnected.

Therefore, the inner diameter of the insertion hole 38a is increased,
The winding outer surface of the coil 130A, 130B is inserted into the insertion hole 3
An attempt was made to prevent the inner wall 8a from hitting the inner wall. However, in this case, since the insertion hole diameter is large,
There is a problem in that a poor soldering between the coil terminal pins 29 and the wiring pattern of the printed wiring board 38 occurs.

The present invention has been made in view of the above-mentioned conventional problems, and a first object of the present invention is to provide a diaphragm device which can efficiently attach a connector connected to a control unit to a printed wiring board. It is.

A second object of the present invention is to obtain a lightweight diaphragm device by shortening a magnetic circuit member.

A third object is to provide a diaphragm device which can be connected to a printed wiring board without breaking a coil wound around a coil terminal pin.

[0015]

In order to achieve the above object, the present invention provides an intermediate member having a predetermined thickness between a printed wiring board and a bobbin. The intermediate member has a connector terminal pin. A connector mounting portion is formed having a thickness corresponding to the length of the insertion portion to be inserted and the length of the connector terminal pin.

Also, an intermediate member having a predetermined thickness is interposed between the printed wiring board and the bobbin.
A recess for accommodating the end of the bobbin is formed, and a magnetic circuit member is brought into contact with the outer periphery of the recess.

Further, an intermediate member having a predetermined thickness is interposed between the printed wiring board and the bobbin. The intermediate member has an inner diameter larger than the outer diameter of the coil wound around the coil terminal pin, and has an inner surface larger than that of the bobbin. A terminal pin insertion hole having a shape whose inner diameter is widened toward is formed, and the tip of the coil terminal pin penetrating the terminal pin insertion hole is electrically connected to the printed wiring board.

[0018]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are exploded perspective views showing an embodiment of the aperture device of the present invention.

As shown in FIG. 1, the diaphragm device E includes a blade driving unit 10
And a diaphragm unit 50 that is opened and closed by the blade drive unit 10.

As shown in FIG. 2, the diaphragm unit 50 is
, A first opening / closing member, for example, an aperture blade E1, a second opening / closing member, for example, an aperture blade E2, and one side of the ground plate 51.
1, an operating lever 90 which engages with the diaphragm blades E1 and E2 to transmit the driving force of the blade drive unit 10, and biases the operating lever 90 in one direction. And an urging spring 95 that performs the operation.

As shown in FIG. 1, an optical path opening 52
And a mounting portion 53 of the blade drive unit 10 and several engagement protrusions 55a, 55b,
56a and 56b, fitting ribs 57a and 57b, small holes 54 for driving shaft penetration, and columns 58 for holding the printed wiring board 38 are provided.

A relief 52N is formed in the optical path opening 52 so as not to hinder the movement of an ND filter 89 described later.

Further, engagement pins 59a and 59b slidingly engaged with the diaphragm blades E1 and E2 so that the diaphragm blades E1 and E2 can move on the main plate 51 without sliding contact with each other,
Projections 61a to 61 for lifting aperture blades E1 and E2
h etc. are provided.

The operating lever 90 is provided with a hole 91 into which the drive shaft of the blade drive unit 10 is fitted, and pin portions 92a and 92b which engage with the aperture blades E1 and E2.

The diaphragm blade E1 is formed of a thin piece of black polyester or the like, and has a diaphragm opening 80 for regulating the amount of light.
A small hole 82 fitted with the pin portion 92b;
and a long hole 83 that engages with the second hole b.

On the other hand, the diaphragm blade E2 is also formed of a thin piece of black polyester or the like, and engages with the diaphragm opening 85 for regulating the amount of light, the small hole 87 fitted with the pin 92a, and the engaging pin 59a. An elongated hole 88 is provided.

In addition, at the deepest portion of the aperture 80 of the diaphragm blade E1, a light amount adjusting member such as an ND filter (Neutra) is provided.
l Density Filter) 89 is stuck.

The holding plate 70 has an optical path opening 71, elongated holes 72 a and 72 b formed so that the pin portions 92 a and 92 b of the operating lever 90 can rotate, and coupling portions 74 a and 74 b for coupling with the main plate 51. Holes 75a and 75b facing the engagement pins 59a and 59b, and projections 62a to 62d for floating the aperture blades E1 and E2 are provided.

The optical path opening 71 has an aperture blade E2 and N
An escape portion 71N is formed so as not to hinder the movement of the ND filter 89 when the D filter 89 is attached. Next, the configuration of the blade drive unit 10 will be described.

As shown in FIGS. 1 and 3, the blade drive unit 10 includes a permanent magnet 11 pivotally supported at the center thereof, a coupling bobbin 14 and a pin bobbin 25 surrounding the permanent magnet 11. And a drive coil 130A and a braking coil 130B wound on both bobbins 14 and 25 as shown in FIG. 3, and an iron hollow cylinder which is fitted on the outer periphery of both bobbins 14 and 25 and guides the magnetism of permanent magnet body 11. Shaped Magnetic Circuit Member (Yoke) 35
And an intermediate plate 36 (intermediate member) made of, for example, synthetic resin for holding the end of the magnetic circuit member 35, and the coils 130A and 13 penetrating through the terminal pin insertion holes 36a of the intermediate plate 36.
And a printed wiring board 38 connected to the coil terminal pins 29a to 29d of the OB.

As shown in a partial sectional view of FIG. 4, a connector 37 for electrically connecting to a control section is fixed to the end 38C of the printed wiring board 38 by soldering.

The permanent magnet body 11 is a cylindrical magnet 12
And a drive shaft 13 fixed through the center of the cylinder of the magnet 12, and the bobbin 14 and the bobbin 25
And is rotatably supported inside.

On the upper part of the bobbin 25, the coils 130A, 1
A coil terminal pin 29 (29a, 29a,
29b, 29c, 29d) are provided.

Then, the magnetic circuit member 35 is fitted and covered with the intermediate plate 36, and then the coil terminal pins 29a, 29a are inserted into the four small holes 38a formed in the printed wiring board 38.
b, 29c, 29d.

Finally, the coil terminal pins 29a, 29b, 2
The assembly of the blade drive unit 10 is completed by joining the printed wiring boards 9c and 29d with solder or the like.

The inside diameter of the small hole 38a of the printed wiring board 38 is formed to the minimum inside diameter that allows the tip of the terminal pin 29 to pass therethrough, and is considered so that soldering failure does not occur.

The intermediate plate 36 interposed between the printed wiring board 38 and the bobbins 14 and 25 includes coils 130A and 130B wound around the coil terminal pins 29 as shown in FIG.
A terminal pin insertion hole 36a having an inner diameter larger than the winding outer diameter of the terminal pin and having an inner diameter expanding toward the end face of the bobbin 25.
A concave portion 36b for accommodating the end of the bobbin 25; a contact portion 36c that contacts the magnetic circuit member 35 around the outside of the concave portion 36b; an insertion portion 36d into which the connector terminal pin 37a is inserted; And a connector mounting portion 36e processed to a thickness t according to the length of the connector.

The connector mounting portion 36e is processed to a thickness t according to the length of the connector terminal pin 37a as described above, and the length of the connector terminal pin 37a protruding from the upper surface of the printed wiring board 38 is longer than necessary. It is formed so as not to be long.

According to this embodiment, the coils 130A, 1
When connecting the terminal pin 29 of 30B to the printed wiring board 38, the coil 130 wound around the terminal pin 29
The end of the terminal pin 29 can be inserted into the small hole 38a of the printed wiring board 38 by penetrating the terminal pin insertion hole 36a without touching the outer peripheral surface of A, 130B to the inner wall of the long hole 36a. As a result, the coils 130A and 130B wound around the terminal pins 29 can be connected to the printed wiring board 38 without being damaged or broken. Then, the small hole 38a of the printed wiring board 38 is
The terminal pin 29 can be connected without causing soldering failure because it is formed with the minimum inner diameter that can pass through the tip of the terminal.

Further, since the connector 37 is attached to the connector attaching portion 36e processed to a thickness corresponding to the length of the connector terminal pin 37a, the connector terminal pin 3
There is no need to manually adjust the length of 7a,
It can be efficiently installed in a solder bath or the like.

Further, a concave portion 36b for accommodating the end of the bobbin 25 is formed inside the intermediate plate 36, and the magnetic circuit member 35 is brought into contact with and supported by a contact portion 36c on the outer periphery of the concave portion 36b. In addition, the magnetic circuit member 35 can be shortened, and can be configured lightweight and inexpensive.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and for example, the following modifications are possible.

(1) In the above embodiment, the coil terminal pins 29
Although the arrangement of (29a to 29d) was linear,
The aperture device is not limited to a linear arrangement of coil terminal pins.

(2) In the above-described embodiment, the diaphragm device in which the adjacent opening / closing members are relatively moved in opposite directions to change the size of the aperture formed by the diaphragm opening of the opening / closing member has been described. Also, the present invention can be applied to a diaphragm device in which a plurality of opening / closing members are arranged on a circumference and these opening / closing members are moved in the center direction or the outside direction to change the size of the opening.

(3) In the above embodiment, the terminal pin insertion hole 36
Although a is formed stepwise, it may be formed in a tapered shape.

[0047]

According to the drawing device of the present invention, the connector is attached to the connector mounting portion processed to a thickness corresponding to the length of the connector terminal pin. This eliminates the need for adjustment, and allows efficient mounting in a solder bath or the like.

Further, a concave portion for accommodating the end of the bobbin is formed in an intermediate member interposed between the printed wiring board and the bobbin, and the magnetic circuit member is brought into contact with the outer periphery of the concave portion. Because the bobbin is accommodated in the magnetic circuit member, the length of the magnetic circuit member is shortened, and the weight can be reduced.

Further, the tip of the coil terminal pin is connected to the printed wiring board via an intermediate plate having a predetermined inner thickness in which a terminal pin insertion hole having an inner diameter larger than the outer diameter of the coil winding and having an inner diameter expanding toward the end face of the bobbin is formed. Electrically connected to the printed circuit board without damaging or breaking the coil wound around the terminal pin.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the aperture device of the present invention.

FIG. 2 is an exploded perspective view of the throttle unit of FIG.

FIG. 3 is an exploded perspective view showing a structure of a blade driving unit in FIG. 1;

FIG. 4 is a partial sectional view showing a mounting state of a drive coil terminal pin and a connector.

FIG. 5 is a perspective view showing a mounting state of a drive coil terminal pin and a connector in a conventional diaphragm device.

FIG. 6 is a partial perspective view for explaining a problem in mounting a drive coil terminal pin and a connector in a conventional diaphragm device.

[Explanation of symbols]

 E aperture device for camera E1 aperture blade E2 aperture blade 10 blade drive unit 25 bobbin 29a-29d terminal pin 36 intermediate plate 36a terminal pin insertion hole 36e connector mounting unit 38 printed wiring board

Claims (3)

(57) [Scope of request for utility model registration] 1. An electronic apparatus comprising: a plurality of opening / closing members forming a diaphragm opening of a camera; and a drive unit for electrically driving these opening / closing members to adjust the size of the diaphragm opening. A bobbin around which a coil for rotatably housing the permanent magnet body and driving the permanent magnet body is wound; a coil terminal pin attached to an end surface of the bobbin and connected to an end of the coil; The connector has a hole for inserting a connector terminal pin of the connector electrically connected to the control unit and a hole for inserting the coil terminal pin, and is attached to an end face of the bobbin to electrically connect the coil terminal pin and the connector terminal pin. A diaphragm having a predetermined thickness between the printed wiring board and the bobbin, wherein the intermediate member has Throttle apparatus characterized by terminal pins to form the insertion portion and the connector connector mounting portion which is processed to a thickness corresponding to the length of the terminal pins are inserted. 2. A camera comprising: a plurality of opening / closing members forming an aperture opening of a camera; and a drive unit for electrically driving these opening / closing members to adjust the size of the aperture opening. A bobbin around which a coil for rotatably housing the permanent magnet body and driving the permanent magnet body is wound; a coil terminal pin attached to an end surface of the bobbin and connected to an end of the coil; The connector has a hole for inserting a connector terminal pin of the connector electrically connected to the control unit and a hole for inserting the coil terminal pin, and is attached to an end face of the bobbin to electrically connect the coil terminal pin and the connector terminal pin. And a magnetic circuit member covering the periphery of the bobbin, wherein the intermediate part having a predetermined thickness between the printed wiring board and the bobbin Interposing a timber, the intermediate member, a recess for accommodating the ends of the bobbin, the diaphragm and wherein the contacting the magnetic circuit member outside the periphery of the recess. 3. A plurality of opening / closing members forming an aperture opening of a camera, and a drive unit for electrically driving these opening / closing members and adjusting the size of the aperture opening, wherein the driving unit includes: A bobbin around which a coil for rotatably housing the permanent magnet body and driving the permanent magnet body is wound, a coil terminal pin attached to an end face of the bobbin and wound around an end of the coil, and a coil terminal An aperture device having a hole for inserting a pin, and a printed wiring board attached to an end surface of the bobbin and electrically connecting the coil terminal pin and a control unit of the camera, wherein the printed wiring board and the bobbin are An intermediate member having a predetermined thickness is interposed between the bobbin and the intermediate member, the inner diameter of which is larger than the outer diameter of the coil wound around the coil terminal pin. Toward the surface to form a terminal pin insertion hole of the inner diameter is expanded shape, the iris, characterized in that the tip of the coil terminal pins extending through the terminal pin insertion holes and electrically connected to the printed circuit board.