JPH064745U - Diaphragm device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a diaphragm device that can efficiently attach a connector to a control unit to a printed wiring board and can shorten a magnetic circuit member to reduce its weight. . [Structure] An intermediate member 36 having a predetermined thickness is interposed between the printed wiring board and the bobbin 25.
An insertion portion into which the connector terminal pins 29a to 29d are inserted and a connector attachment portion processed into a thickness corresponding to the length of the connector terminal pin are formed. Also, in this intermediate member,
A recess is formed to accommodate the end of the bobbin, and the magnetic circuit member is brought into contact with the outer periphery of the recess. Further, a terminal pin insertion hole 36a having an inner diameter larger than the winding outer diameter of the coil wound around the coil terminal pin and having a shape in which the inner diameter expands toward the end face of the bobbin is formed in the intermediate member. The tip of the penetrating coil terminal pin is electrically connected to the printed wiring board 38.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a diaphragm device for a camera.

[0002]

[Prior art]

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

FIG. 5 is a perspective view showing a schematic configuration of such a diaphragm device E, which is composed of a blade driving unit 10 and a diaphragm unit 50 which is driven to open and close by the blade driving unit 10.

The diaphragm unit 50 includes a base plate 51 to which the blade drive unit 10 is attached, and a support column 58 for fixing the printed wiring board 38 is erected on the base plate 51.

On the other hand, the blade drive unit 10 is provided with a hollow cylindrical iron magnetic circuit member (yoke) 35 having a permanent magnet, a drive coil, and a braking coil housed therein, and the drive coil inside thereof. Also, the coil terminal pin 29 of the braking coil penetrates to the upper surface of the printed wiring board 38 and is soldered to the wiring pattern on the upper surface of the printed wiring board 38.

The blade driving unit 10 and the control unit of the camera are connected by a connector 37 soldered and fixed to the right end of the printed wiring board 38 in the figure.

[0007]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional structure, the ends of the drive coil 130A and the braking coil 130B wound around the bobbin 25 are wound around and fixed to the coil terminal pin 29 as shown in FIG. 6 (a). Further, as shown in FIG. 6B, the connector 37 is designed to be soldered and fixed 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 extra solder is attached between the connector terminal pins 37a and the pins 37a are short-circuited. This can be solved by manually cutting the pin 37a for a short time and then performing a soldering work, but since the pin 37a must be cut each time, work efficiency is reduced. The problem arises.

Since the magnetic circuit member 35 is made of iron, it is heavier and more costly than plastic.

Further, since the pin insertion hole 38a of the printed wiring board 38 into which the coil terminal pin 29 is inserted has a uniform inner diameter as shown in FIG. 6A, the coil terminal pin 29 is inserted into the insertion hole. When inserted into the coil terminal 38a, the outer peripheral surfaces of the coils 1 30A and 130B wound around the coil terminal pin 29 hit the inner wall surface of the insertion hole 38a, and the coils 130A and 130B are broken.

Therefore, an attempt was made to increase the inner diameter of the insertion hole 38a so that the wound outer peripheral surfaces of the coils 130A and 130B do not contact the inner wall surface of the insertion hole 38a. However, in this case, since the diameter of the insertion hole is large, there is a problem that soldering failure between the coil terminal pin 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 thereof is to obtain a diaphragm device capable of efficiently attaching a connector to be connected to a control unit to a printed wiring board. Is.

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

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

[0015]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention interposes an intermediate member having a predetermined thickness between a printed wiring board and a bobbin, and inserts a connector terminal pin into this intermediate member and a connector terminal. Form the connector mounting part that has been machined to a thickness corresponding to the length of the pin.

In addition, an intermediate member having a predetermined thickness is interposed between the printed wiring board and the bobbin, and a recess for accommodating the end of the bobbin is formed in the intermediate member, and a magnetic circuit is provided around the outside of the recess. Contact the parts.

Further, an intermediate member having a predetermined thickness is interposed between the printed wiring board and the bobbin, and the end face of the bobbin has an inner diameter larger than the winding outer diameter of the coil wound around the coil terminal pin. A terminal pin insertion hole with a shape whose inner diameter expands toward is formed, and the tip of the coil terminal pin that penetrates this terminal pin insertion hole is electrically connected to the printed wiring board.

[0018]

【Example】

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

1 and 2 are exploded perspective views showing an embodiment of the diaphragm 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 driven to open and close by the blade driving unit 10.

As shown in FIG. 2, the diaphragm unit 50 includes a base plate 51 to which the blade drive unit 10 is attached, a first opening / closing member such as a diaphragm blade E1, a second opening / closing member such as a diaphragm blade E2, and one surface of the base plate 51. A pressing plate 70 which covers and holds the diaphragm blades E1 and E2 slidably with the base plate 51, and an operating lever 90 which engages with the diaphragm blades E1 and E2 and transmits the driving force of the blade driving unit 10. , A biasing spring 95 for biasing the actuating lever 90 in one direction at all times.

As shown in FIG. 1, the main plate 51 has an optical path opening 52, a mounting portion 53 of the blade driving unit 10, and some engaging projections 55 a, 55 b, 56 a formed on the mounting portion 53. 56 b, fitting ribs 57 a and 57 b, a small hole 54 for penetrating the drive shaft, and a column 58 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, in order to allow the diaphragm blades E1 and E2 to move on the main plate 51 without sliding contact with each other, the engagement pins 59a and 59b slidably engaged with the diaphragm blades E1 and E2, and the diaphragm blades E1 and E2. Are provided with protrusions 61a to 61h for floating.

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 diaphragm 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 for fitting with the pin 92b, and an elongated hole for fitting with the engaging pin 59b. And 83 are provided.

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

A light amount adjusting member, for example, an ND filter (Neutral Density Filter) 89 is attached to the deepest part of the opening 80 of the diaphragm blade E1.

The pressing 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 actuating lever 90 can rotate, and coupling portions 74 a and 74 b that are coupled to the main plate 51. Holes 75a and 75b exposed by the engagement pins 59a and 59b and projections 62a to 62d for floating the diaphragm blades E1 and E2 are provided.

A relief portion 71N is formed in the optical path opening 71 so as not to hinder the movement of the ND filter 89 when the ND filter 89 is attached to the diaphragm blade E2. Next, the structure of the blade drive unit 10 will be described.

The blade drive unit 10 includes a permanent magnet body 11 that is rotatably supported in the center as shown in FIGS. 1 and 3, and a coupling side bobbin 14 and a pin side bobbin that surround the permanent magnet body 11. 25, a drive coil 130A and a braking coil 130B wound around both bobbins 14 and 25 as shown in FIG. 3, and an iron hollow that is fitted around the outer circumferences of both bobbins 14 and 25 to guide the magnetism of the permanent magnet body 11. A cylindrical magnetic circuit member (yoke) 35, an intermediate plate 36 (intermediate member) made of, for example, synthetic resin that holds the end of the magnetic circuit member 35, and a terminal pin insertion hole 36a of the intermediate plate 36. And the printed wiring board 38 connected to the coil terminal pins 29a to 29d of the coils 130A and 130B.

A connector 37 for electrically connecting to the control portion is soldered and fixed to the end portion 38C of the printed wiring board 38 as shown in the partial sectional view of FIG.

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

On the upper part of the bobbin 25, coil terminal pins 29 (29a, 29b, 29c, 29d) for winding the wire ends of the coils 130A, 130B are provided.

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

Finally, by assembling the coil terminal pins 29a, 29b, 29c, 29d and the printed wiring board 38 with solder or the like, the assembly of the blade drive unit 10 is completed.

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

The intermediate plate 36 interposed between the printed wiring board 38 and the bobbins 14 and 25 has an inner diameter larger than the winding outer diameter of the coils 130 A and 130 B wound around the coil terminal pin 29 as shown in FIG. Then, the terminal pin insertion hole 36a having a shape in which the inner diameter expands toward the end surface of the bobbin 25, the concave portion 36b for accommodating the end portion of the bobbin 25, and the contact portion for contacting the magnetic circuit member 35 around the outside of the concave portion 36b. 36c, an insertion portion 36d into which the connector terminal pin 37a is inserted, and a connector attachment portion 36e processed into a thickness t corresponding to the length of the connector terminal pin 37a.

The connector mounting portion 36e is processed into the thickness t corresponding to the length of the connector terminal pin 37a as described above, and the length of the connector terminal pin 37a protruding on the upper surface of the printed wiring board 38 is longer than necessary. It is formed so that it does not become long.

According to this embodiment, when the terminal pins 29 of the coils 130A and 130B are connected to the printed wiring board 38, the outer peripheral surfaces of the coils 130A and 130B wound around the terminal pins 29 are attached to the inner wall of the elongated hole 36a. The terminal pin insertion hole 36a can be penetrated without hitting the terminal pin 29 and the tip of the terminal pin 29 can be inserted into the small hole 38a of the printed wiring board 38. As a result, the coils 130A and 130B wound around the terminal pin 29 can be connected to the printed wiring board 38 without being scratched or broken. Since the small hole 38a of the printed wiring board 38 is formed to have the minimum inner diameter that allows the tip of the terminal pin 29 to pass therethrough, the terminal pin 29 can be connected without causing soldering failure.

Further, since the connector 37 is attached to the connector attaching portion 36e that is processed to have a thickness corresponding to the length of the connector terminal pin 37a, it is necessary to manually adjust the length of the connector terminal pin 37a. It can be mounted efficiently in a solder bath etc.

Further, a concave portion 36b for accommodating the end portion 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 the contact portion 36c on the outer periphery of the concave portion 36b. The magnetic circuit member 35 can be shortened, and the structure can be made lightweight and inexpensive.

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

(1) Although the coil terminal pins 29 (29a to 29d) are arranged in a straight line in the above embodiment, the diaphragm device is not limited to the linear arrangement of the coil terminal pins.

(2) In the above-described embodiment, the diaphragm device in which the adjacent opening / closing members are moved in mutually opposite directions to change the size of the aperture formed by the aperture opening of the opening / closing member has been described. It is also applicable to a diaphragm device in which a plurality of opening / closing members are arranged on the circumference and these opening / closing members are moved in the central direction or in the outward direction to change the size of the aperture.

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

[0047]

[Effect of device]

 According to the diaphragm device of the present invention, since the connector is attached to the connector mounting portion that is machined to have a thickness corresponding to the length of the connector terminal pin, it is necessary to manually adjust the length of the connector terminal pin. It can be mounted efficiently in a solder bath etc.

Further, the intermediate member interposed between the printed wiring board and the bobbin is provided with a recess for accommodating the end of the bobbin, and the magnetic circuit member is brought into contact with the outer periphery of the recess. Since the bobbin is housed inside, 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 through an intermediate plate having an inner diameter larger than the coil winding outer diameter and having a terminal pin insertion hole having a shape in which the inner diameter expands toward the end surface of the bobbin. Since it is electrically connected to the board, it can be connected to the printed wiring board without damaging the coil wound around the terminal pin or breaking the coil.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of a diaphragm unit of FIG.

FIG. 3 is an exploded perspective view showing the structure of the blade drive unit of FIG.

FIG. 4 is a partial cross-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 drive coil terminal pins 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 Camera diaphragm device E1 diaphragm blade E2 diaphragm blade 10 blade drive unit 25 bobbin 29a to 29d terminal pin 36 intermediate plate 36a terminal pin insertion hole 36e connector mounting portion 38 printed wiring board

Claims (3)

[Scope of utility model registration request] 1. A plurality of opening / closing members that form an aperture opening of a camera, and a drive section that electrically drives these opening / closing members to adjust the size of the aperture opening. A bobbin around which a coil for rotatably accommodating a permanent magnet body and which rotationally drives the permanent magnet body is wound, a coil terminal pin attached to an end surface of the bobbin, and an end portion of the coil is connected, and the camera It has a hole for inserting a connector terminal pin of a connector electrically connected to a control section and a hole for inserting the coil terminal pin, and is attached to an end surface of the bobbin to electrically connect the coil terminal pin and the connector terminal pin. And a bobbin, an intermediate member having a predetermined thickness is interposed between the printed wiring board and the bobbin, and the connector is connected to the intermediate member. 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 plurality of opening / closing members that form an aperture opening of a camera, and a drive unit that electrically drives the opening / closing members to adjust the size of the aperture opening. A bobbin around which a coil for rotatably accommodating a permanent magnet body and which rotationally drives the permanent magnet body is wound, a coil terminal pin attached to an end surface of the bobbin, and an end portion of the coil is connected, and the camera It has a hole for inserting a connector terminal pin of a connector electrically connected to a control section and a hole for inserting the coil terminal pin, and is attached to an end surface of the bobbin to electrically connect the coil terminal pin and the connector terminal pin. A diaphragm device having a printed wiring board and a magnetic circuit member that covers the periphery of the bobbin, wherein an intermediate portion having a predetermined thickness is provided 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 that form an aperture opening of a camera, and a drive section that electrically drives these opening / closing members to adjust the size of the aperture opening. A bobbin around which a coil for rotatably accommodating a permanent magnet body is wound, a coil terminal pin attached to an end surface of the bobbin, and an end portion of the coil is wound around the bobbin, and the coil terminal. A diaphragm device having a hole for inserting a pin and having a printed wiring board that is attached to an end surface of the bobbin and electrically connects the coil terminal pin and a control unit of the camera, wherein the printed wiring board and the bobbin are provided. An intermediate member having a predetermined thickness is interposed between the bobbin and the bobbin with an inner diameter larger than the outer circumference 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.