JP2583085Y2 - Printed wiring board for drawing 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 printed wiring board for an aperture device for electrically connecting an aperture device of a camera and a control unit of the camera, and more particularly to a printed wiring board having a solder plated finish. The present invention relates to a device that is inserted into a connector of a control unit of a camera to be coupled.

[0002]

2. Description of the Related Art A diaphragm device of a camera used in 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 to control the aperture of the diaphragm. I have. The diaphragm device and the control unit of the camera are electrically connected by a flexible printed wiring board.

[0003] One end of such a printed wiring board is connected to the terminal of each of the coils provided in the drive section, and the other end is finished by solder plating and inserted into a connector of a control section of a camera. ing.

[0004] Such a printed wiring board for a drawing device is
When assembling the iris device, the joint on the drive section is soldered to each coil pin, and the joint on the control section is inserted into a test connector. This test connector has a sensor bias power supply and other necessary Various assembling tests are carried out by combining instruments.

[0005]

However, the joint portion of the printed wiring board is subjected to electrolytic solder plating so that the end surface of the rolled copper foil as a conductor ensures electrical connection with the connector. Such a plating is inherently susceptible to damage and has a very thin thickness of at most about 10 μm, and it is not preferable to make an insertion mark in a component test stage before being connected to a regular connector on the camera side.

This invention has been made in view of the above-mentioned conventional problems. In the test stage as a single stop device, the connecting portions of the printed wiring board are inserted into the connectors of the control unit of the camera one by one. It is another object of the present invention to provide a printed wiring board for a drawing device, which does not have to worry about damaging the joint with the control unit.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a plurality of opening / closing members forming a diaphragm opening of a camera, and electrically driving the opening / closing members to form the diaphragm opening. Used in a diaphragm device having a driving unit for adjusting the size, a diaphragm for a diaphragm device printed wiring board that electrically couples the driving unit and the control unit of the camera via a conductive member; Inspection terminal portions that are electrically connected to the conductive member and that check the operation of the aperture device are provided at appropriate locations other than the coupling portion and the coupling portion with the control portion.

[0008]

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

FIGS. 1 and 2 are exploded perspective views of a diaphragm device of a video camera to which a printed wiring board for a diaphragm device according to an embodiment of the present invention is applied.

[0010] As shown in FIG.
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 includes a blade driving unit 10.
, A first opening / closing member such as a diaphragm blade E1, a second opening / closing member such as a diaphragm blade E2,
1 and the diaphragm blades E1,
A holding plate 70 for slidably holding E2 and an aperture blade E
1, an operating lever 90 that engages with E2 and transmits the driving force of the blade drive unit 10, and an urging spring 95 that constantly biases the operating lever 90 in one direction.

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, 56b, ribs 57a, 57b for fitting, small holes 54 for driving shaft penetration, and locking projections 58a, 58b for holding the printed wiring board 38 are provided.

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

Further, the diaphragm blades E1 and E2 are moved to the main plate 51 without slidingly contacting each other.
Engagement pins 59a and 59b that slidably engage with E1 and E2, and projections 61a to 61h for lifting the aperture blades E1 and E2 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 made 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.

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, long holes 72a and 72b formed so that the pin portions 92a and 92b of the operating lever 90 can rotate, and connecting portions 74a and 74b for connecting to the main plate 51. Holes 75a and 75b facing the engaging pins 59a and 59b, and projections 62a to 62d for floating the aperture blades E1 and E2 are provided.

It is to be noted that the aperture blade E2 has 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.

The blade driving unit 10 includes a permanent magnet 11 pivotally supported at the center as shown in FIG. 1, a coupling bobbin 14 and a pin bobbin 25 surrounding the permanent magnet 11.
3, a drive coil 130 wound around both bobbins 14 and 25 around an axis perpendicular to a drive shaft 13 described later.
A and a braking coil 130B, a hollow cylindrical magnetic circuit member (yoke) 35 which is fitted on the outer periphery of both bobbins 14 and 25 and guides the magnetism of the permanent magnet body 11, and this magnetic circuit member 35
And a magnetic sensor 37 for detecting the rotational angle position of the permanent magnet body 11, and a printed wiring board 38 connected to the magnetic sensor 37 and the coils 130A and 130B. ing.

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
Terminal pins 29a, 29b, 29 for winding the wire ends of 30B
c, 29d are provided.

Then, the magnetic circuit member 35 is fitted and covered with the end plate 36. Thereafter, the terminal pins 29a, 29b, 29c and 29 are inserted into the four small holes formed in the printed wiring board 38.
Place while passing through d.

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

The operating lever 90 may have a structure as shown in FIGS. That is, this operating lever 9
The reference numeral 0 denotes a cylindrical support portion 90a inserted into a winding portion 95b of a spring 95 having one end 95a locked to a projection 51a provided on the main plate 51, and a locking portion locking the other end 95c of the spring 95. 90b, a hole 90c for punching out the locking portion 90b during molding, and a projection 90d for preventing the other end 95c of the spring 95 from rattling in the thrust direction.

The printed wiring board 38 for the aperture device is constructed as shown in FIG.

As shown, the printed wiring board 3 for the drawing device
Reference numeral 8 denotes a connecting portion 101 having terminal pin holes 101a to 101d for inserting the respective terminal pins 29a to 29d, facing the end face of the blade driving portion 10, a sensor portion 102 on which the magnetic sensor 37 is mounted, and a camera (not shown). And a connecting portion 103 which is inserted into and connected to the connector of the control portion, and an extension portion 104 connecting between the connecting portion 101 and the connecting portion 103.

The inspection terminal portions 105a to 105d, which are the main points of the present invention, are provided with the terminal pin holes 10 of the coupling portion 101.
It is provided near 1a to 101d.

As shown in FIG.
Reference numerals a to 105d denote input / output terminals of the magnetic sensor 37. A bias voltage for testing is applied to one pair, and a corresponding Hall voltage is taken out from the other pair.

Such a printed wiring board 38 has excellent flexibility as a base film and is heat-resistant.
Polyimide (polymeritimide) having excellent properties such as insulation and mechanical strength is used, and inexpensive polyester and the like can also be used.

Then, a rolled copper foil having excellent flexibility is attached on these films, and thereafter, a required wiring pattern is obtained by a known photo etching method or the like.

After the required wiring pattern is formed, the joint 103 is subjected to electrolytic solder plating. Then, the plated joint portion 103 and the terminal pin hole 10
A coverlay made of a material similar to that of the base film, such as polyimide, is attached to the entire surface except for the portions 1a to 101d and the inspection terminal portions 105a to 105d to protect the surface.

A plurality of holes indicated by reference numeral 106 in the figure are discarded holes formed in order to insulate a short-circuited part of the conductive wires when the joint 103 is subjected to electrolytic solder plating. It is.

With the above-described configuration, when testing the diaphragm device E by itself before assembling it into the camera, the test lead wire for driving the coil is connected to each terminal pin 29a.
To 29d, and for coupling with the magnetic sensor 37, a test pin prepared in advance is connected to the inspection terminal 105a.
By contacting the contact portion with the contact portion of the aperture 103, it is not necessary to insert the easily damaged solder plating of the coupling portion 103 into the connector for test, leaving no trace of insertion on the plating surface, and not impairing the commercial value of the drawing device itself. .

<Modifications> One embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and for example, the following modifications are possible.

(1) In the above embodiment, the inspection terminal 10
5a to 05d are provided in the vicinity of the terminal pins 29a to 29d, but the arrangement positions of the inspection terminal portions 105a to 05d are not limited to those of this embodiment. For example, the prints for the drawing device shown in FIGS. It may be provided at a location other than the connection portion 101 of the wiring board 110, for example, at the P portion of the extension portion 104.

The inspection terminal 10 of the magnetic sensor 37
5a to 05d as well as the inspection terminals 111a to 111d of the coils 130A and 130B
0 may be provided.

(2) In the above embodiment, the terminal pins 29a to 29a
Although the arrangement of 9d is linear, the aperture device is not limited to a linear arrangement of the terminal pins.

(3) In the above-described embodiment, the diaphragm device in which the adjacent opening / closing members are moved relatively 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.

[0042]

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an overall structure of a diaphragm device of a camera according to an embodiment 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 perspective view showing a modification of the operation lever of FIG. 1;

FIG. 5 is a side view of the operation lever of FIG. 4;

FIG. 6 is a plan view of one embodiment of a printed wiring board for a drawing device.

FIG. 7 is a plan view of another embodiment of a printed wiring board for a drawing device.

FIG. 8 is an enlarged view of a portion P in FIG. 7;

[Explanation of symbols]

 E Aperture device for camera E1 Aperture blade E2 Aperture blade 10 Blade drive unit 29a-29d Terminal pin 37 Magnetic sensor 38 Printed circuit board for diaphragm device 103 Coupling unit 105a-105d Terminal unit for inspection 110 Printed circuit board for diaphragm device 111a-111d Inspection terminal

Claims (2)

(57) [Scope of request for utility model registration] 1. A diaphragm device comprising: a plurality of opening / closing members forming a diaphragm opening of a camera; and a drive unit for electrically driving the opening / closing members and adjusting the size of the diaphragm opening. In a printed wiring board for an aperture device that electrically couples the drive unit and the control unit of the camera via a conductive member, at an appropriate position other than the connection unit with the drive unit and the connection unit with the control unit, A printed wiring board for a drawing device, further comprising an inspection terminal electrically connected to the conductive member for checking the operation of the drawing device. 2. The drive unit includes: a drive shaft for transmitting a driving force to the opening / closing member; a permanent magnet body attached to the drive shaft; and a rotatable housing for the permanent magnet body. A bobbin for projecting one end of the drive shaft, a drive coil wound around the bobbin around an axis perpendicular to the drive shaft to generate a rotational force on the permanent magnet, and a bobbin perpendicular to the drive shaft for the bobbin. A braking coil wound around an axis for braking the rotation of the permanent magnet body, a hollow magnetic circuit member having the bobbin inserted therein, and a magnetic sensor for detecting a rotation angle position of the permanent magnet body And a terminal pin attached to an end face of the bobbin, for fixing an end of the driving coil and the braking coil. The inspection terminal section faces an end face of the bobbin to which the terminal pin is attached. That is provided in a portion, said confirms the operation of the magnetic sensor according to claim 1, wherein the throttle device for a printed wiring board.