JP2001024362A - Printed wiring film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a printed wiring film which can make electronic device components face a lens tube side and fix a flexible wiring board by a single surface mount of the electronic device components and chip components on the flexible wiring board. SOLUTION: Single surface mount of a position sensor 5 and other chip components on flexible wiring boards 1, 2 is performed. The flexible wiring boards 1, 2 are doubly folded from a turn-back segment 3, in such a manner that the lens position sensor 5 and the chip components are made to face the outside. The lens position sensor 5 is inserted in an aperture window 11 formed in a lens tube 10. The dually overlapped flexible printed boards 1, 2 are positioned in a boss 13 and fixed to the lens tube 10, by collectively fastening them with a fixing screw 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible printed wiring film used for wiring electronic devices such as video cameras and digital cameras, and more particularly, to a printed wiring film on which electronic device components and chip components are mounted. By folding the film in half and mounting the printed wiring film with the electronic device component facing the electronic device, the mounting component can be mounted on the printed wiring film by single-sided mounting.

[0002]

2. Description of the Related Art Conventionally, a lens position reset sensor using a photo sensor (hereinafter referred to as a lens position sensor) is used in a lens barrel of a video camera, a digital camera, or the like.
Is provided. The lens position sensor is mounted on a flexible printed wiring film (hereinafter, referred to as a flexible wiring film), and is externally attached by screwing the flexible wiring film to a lens barrel.

FIGS. 10 and 11 show an example of a conventional flexible wiring film. A reinforcing plate 22 made of a resin plate material is fixed to the back side of the flexible wiring film 21, and a lens position sensor 23 is mounted on the reinforcing plate 22 side of the flexible wiring film 21. In the lens position sensor 23, four lead terminals 23a penetrate the reinforcing plate 22 and the flexible wiring film 21, and each of the lead terminals 23a is connected to the wiring pattern (not shown) by soldering 24 on the front surface side of the flexible wiring film 21. I have. On the surface of the flexible wiring film 21, chip components 25 such as resistors and capacitors are mounted.

In the flexible wiring film 21 described above, the lens position sensor 23 is inserted into the window hole 27 opened in the lens barrel 26 and positioned so as to overlap the mounting surface 26a.
The set screw 29 is inserted into the mounting hole 28 penetrating the flexible wiring film 21 and the reinforcing plate 22 and is screwed into the screw hole 30 of the mounting surface 26a to be mounted. At the same time, the setting of the lens position sensor 23 is completed.

[0005]

A general method for mounting the chip component 25 on the surface of the flexible wiring film 21 is to mount the chip component 25 on the land of the flexible wiring film 21 in a reflow furnace. , The solder layer in the land portion is melted and mounted. However, since the lens position sensor 23 is mounted on the back side of the flexible wiring film 21, the lens position sensor 23 is
5 cannot be performed at the same time as mounting, and must be attached manually. Therefore, the lens position sensor 23
However, there is a problem that the positional accuracy varies in the manual mounting, and this has been an obstacle particularly to automation of components mounted on a flexible wiring film.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to obtain a printed wiring film which enables the automatic mounting of chip components together with sensor components on a flexible wiring film.

[0007]

In order to achieve the above object, a printed wiring film according to the present invention has an electronic device component or a chip component mounted on one side of a flexible wiring board, and the flexible wiring board is folded into two parts. The flexible wiring board is attached with the device component facing the equipment structure.

According to the printed wiring film configured as described above, the electronic device component and other chip components are mounted on one side of the flexible wiring board, and the flexible wiring board is folded in two with the mounting surface outside. The flexible wiring board can be attached with the device components facing outward and toward the equipment structure side.

Further, when the flexible wiring board is folded in two with the mounting surface inside, the electronic device component is inserted outward through a window hole formed in the flexible wiring board facing the sensor component, and is directed toward the equipment structure. Flexible wiring boards can be attached.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the printed wiring film according to the present invention will be described below with reference to the accompanying drawings, showing some examples of flexible wiring boards mounted on a lens barrel of a video camera or digital camera.

[First Embodiment] FIG. 1 is a perspective view showing a state in which a lens barrel and a flexible wiring board are separated from each other, FIG. 2 is a perspective view showing a flat state of the flexible wiring board, and FIG. It is an expanded sectional view of the attachment state of the wiring board.

The flexible wiring boards 1 and 2 on which the wiring patterns are formed by printing or the like have the same shape symmetrically, and the both flexible wiring boards 1 and 2 are integrally connected by a narrow folded piece 3. . Further, constricted portions 3a, 3a are formed in the folded portion of the folded piece 3.

A reinforcing plate 4 made of a resin material having the same shape is fixed to the back surface of one flexible wiring board 1 by bonding or the like. The wiring pattern on the surface of the flexible wiring board 1 is used as an electronic device component. For example, a lens position sensor 5 including a photo sensor or the like is mounted.

A chip component 6 such as a resistor or a capacitor is mounted on a wiring pattern on the surface of the other flexible wiring board 2. The flexible wiring board 7 is drawn out from the flexible wiring board 2, and a terminal (not shown) for connecting to a connector is provided at an end of the flexible wiring board 7.

Here, the lens position sensor 5 and the chip component 6 are mounted on the land portions of the wiring patterns of the flexible wiring boards 1 and 2 developed as shown in FIG. This is a so-called single-sided mounting in which the solder is mounted on the land portion in a reflow furnace by melting the solder.

At the symmetrical positions of the flexible wiring boards 1 and 2, positioning holes 9a and 8b are provided together with fixing holes 8a and 8b for fixing.
9b is formed.

The above-mentioned flexible wiring boards 1 and 2 are mounted on the mounting surface 10a of the lens barrel 10. Lens barrel 10
An opening window 11 is formed in which a lens position sensor 5 mounted on the flexible wiring board 1 is mounted facing the inside of the lens barrel 10. A screw hole 12 for fixing the flexible wiring boards 1 and 2 and a boss 13 for positioning are formed on the mounting surface 10a.

Next, the flexible wiring boards 1 and 2 are connected to the lens barrel 1.
The operation procedure for attaching the unit 0 will be described.

First, the folded piece 3 is mountain-folded from the state shown in FIG. 2, and two flexible wiring boards 1 and 2 are stacked so that the lens position sensor 5 and the chip component 6 face outward. Thereby, the mounting holes 8a and 8b and the positioning holes 9a and 9b communicate with each other. Thereafter, one of the flexible wiring boards 1 on which the lens position sensor 5 is mounted faces the mounting surface 10a of the lens barrel 10, and the lens position sensor 5 is opened.
And the positioning holes 9a and 9b are
The flexible wiring boards 1 and 2 are positioned by fitting them into the lens barrel 10, and the set screw 14 is screwed into the screw hole 12 through the mounting holes 8a and 8b.
The mounting of the stacked flexible wiring boards 1 and 2 is completed.

According to the printed wiring film of the present invention described above, the flexible wiring boards 1 and 2 are folded in two with the lens position sensor 5 and the chip component 6 facing outward.
Since the lens position sensor 5 can be easily attached to the lens barrel 10 and the lens position sensor 5 and the chip component 6 can be mounted on the flexible wiring boards 1 and 2 on one side, flexible wiring is possible. Plates 1, 2
The mounting components can be easily automated, and the positional accuracy of the lens position sensor 5 and the chip component 6 can be improved.

The folded pieces 3 of the flexible wiring boards 1 and 2 have a narrow width and have narrow portions 3a and 3a at the folded portions, so that the folded pieces 3 have a small curvature when folded into two. Then, the flexible wiring boards 1 and 2 can be prevented from floating.

Also, the folded flexible wiring boards 1 and 2
Are fixed to the lens barrel 10 with set screws 14 through the mounting holes 8a and 8b that communicate with each other, and the positioning holes 9a and 9b that also communicate with each other are positioned at the boss 13 of the lens barrel 10. Installation work becomes easy.

[Second Embodiment] FIG. 4 is a perspective view of a separated state of a lens barrel and a flexible wiring board, FIG. 5 is a perspective view of a flat state of the flexible wiring board, and FIG. 6 is a flexible view of the lens barrel. FIG. 3 is an enlarged cross-sectional view of a state in which a wiring board is mounted, and the same components as those in the first embodiment are denoted by the same reference numerals and described.

This embodiment is an embodiment in which a temperature sensor 15 for detecting the in-cylinder temperature of the lens barrel 10 is mounted. The temperature sensor 15 is mounted adjacent to the lens position sensor 5 mounted on the flexible wiring board 1 because the temperature sensor 15 can be more accurately measured by arranging it toward the lens barrel 10.

That is, when the flexible wiring boards 1 and 2 are folded in two and fixed to the mounting surface 10 a of the lens barrel 10 with screws, the lens position sensor 5 is inserted into the opening window 11 of the lens barrel 10. At the same time, the temperature sensor 15 is inserted into the opening window 16 formed adjacent to the opening window 11.

In the case of the printed wiring film described above, the temperature sensor 15 can be mounted on the flexible wiring board 1 together with the lens position sensor 5 on one side, so that the components mounted on the flexible wiring film can be easily automated, and the lens position can be easily adjusted. There is an advantage that the position accuracy of the sensor 5 and the temperature sensor 15 can be improved.

[Third Embodiment] FIG. 7 is a perspective view showing a state in which a lens barrel and a flexible wiring board are separated, FIG. 8 is a perspective view showing a planar state of the flexible wiring board, and FIG. FIG. 4 is an enlarged cross-sectional view of a state where a wiring board is attached, and the same components as those in the first and second embodiments described above are denoted by the same reference numerals and described.

A window hole 1 is formed in a portion of the flexible wiring board 2 corresponding to the lens position sensor 5 mounted on one side of the flexible wiring board 1.
7 is open. Notches 1a, 1a are formed at corners of the flexible wiring board 1 corresponding to the chip components 6 mounted on one side of the flexible wiring board 2.

In the printed wiring film described above, the folded pieces 3 are valley-folded from the state shown in FIG. 8, and two flexible wiring boards 1 and 2 are overlapped so that the lens position sensor 5 and the chip component 6 face inward. Insert the lens position sensor 5 into the window hole 17
Through the rear surface of the flexible wiring board 2. At this time, the chip component 6 is exposed from the cutouts 1a, 1a of the flexible wiring board 1 in a state where the flexible wiring boards 1, 2 are overlapped.

Thereafter, the lens position sensor 5 is moved to the opening window 1.
1 and positioning holes 9a, 9b are
3, the flexible wiring boards 1 and 2 are positioned, and the set screws 14 are screwed into the screw holes 12 through the mounting holes 8a and 8b. 2 is completed.

According to the above-described printed wiring film, the flexible wiring boards 1 and 2 are connected to the lens position sensor 5 and the chip component 6.
When the lens is folded inward, the lens position sensor 5 is directed toward the lens barrel 10 through the window hole 17, but the lens position sensor 5 can be easily attached to the lens barrel 10. Moreover, in this case, the lens position sensor 5 and the chip component 6 need only be mounted on one side of the flexible wiring boards 1 and 2, so that the components mounted on the flexible wiring film can be easily automated, and the lens position sensor 5 and the The positional accuracy of the chip component 6 can also be improved.

In this case, since the flexible wiring board 1 having the reinforcing plate 4 is on the outside, the reinforcing plate 4 is
Of the flexible wiring board 2 on the inside can be prevented.

The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

The flexible wiring boards 1 and 2 do not necessarily have to have the same shape, and one of them may be enlarged.

Although the case where the reinforcing plate 4 is provided on the flexible wiring board 1 has been described, it may be provided on both the flexible wiring boards 1 and 2 as needed.

Further, the printed wiring film according to the present invention comprises:
The case where the present invention is applied to a lens barrel of a video camera or a digital camera has been described. However, the present invention can be widely applied to a case where an electronic device component mounted on a flexible wiring board is attached to a device structure side.

[0037]

As described above, in the printed wiring film according to the present invention, an electronic device component or a chip component is mounted on one side of a flexible wiring board, and the flexible wiring board is folded into two parts.
Since the flexible wiring board is mounted with the electronic device components facing the equipment structure side, the electronic device components and chip components can be mounted on one side of the flexible wiring board, making it easy to automate components mounted on the flexible wiring board. While you can
This has the effect of improving the positional accuracy of electronic device components and chip components.

Further, since the mounted electronic device component and the chip component are folded outward from the folded portion on the flexible wiring board, the electronic device component and the chip component may be mounted on one side, and the electronic device component may be mounted on the device. It can be easily attached to the structure side with good workability.

Further, the flexible wiring board is configured such that the mounted electronic device component and the chip component are folded inward from the folded portion, and the electronic device component is inserted through the window hole opened in the flexible wiring board to the outside. The electronic device components and chip components may be mounted on one side, and the electronic device components can be easily mounted with good workability toward the device structure.

Further, since the folded portion has a narrow width and a narrow portion is formed at the folded portion, the folded portion is folded with a small curvature, and the floating of the flexible wiring board can be suppressed.

Further, since the folded flexible wiring board is fixed to the equipment structure together with the fixing screw, the flexible wiring board can be attached with good workability without floating of the flexible wiring board.

Further, since the folded flexible wiring board is inserted and positioned in the boss provided on the device structure side, the folded flexible wiring board can be simultaneously positioned with good workability.

[Brief description of the drawings]

FIG. 1 is a perspective view of a flexible wiring board and a lens barrel in a separated state according to a first embodiment.

FIG. 2 is a perspective view of the flexible wiring board in a planar state.

FIG. 3 is an enlarged cross-sectional view of the flexible wiring board in an attached state.

FIG. 4 is a perspective view showing a state in which a flexible wiring board and a lens barrel are separated according to a second embodiment;

FIG. 5 is a perspective view of the flexible wiring board in a planar state.

FIG. 6 is an enlarged sectional view of the flexible wiring board in an attached state.

FIG. 7 is a perspective view showing a state in which a flexible wiring board and a lens barrel are separated according to a third embodiment.

FIG. 8 is a perspective view of the flexible wiring board in a planar state.

FIG. 9 is an enlarged sectional view of the flexible wiring board in an attached state.

FIG. 10 is a perspective view of a conventional flexible wiring board and a lens barrel in a separated state.

FIG. 11 is an enlarged cross-sectional view of the flexible wiring board in an attached state.

[Explanation of symbols]

1,2 ... flexible wiring board, 1a ... notch, 3 ... turned piece,
3a: constricted portion, 4: reinforcing plate, 5: lens position sensor, 6: chip component, 8a, 8b: mounting hole, 9a, 9
b: positioning hole, 10: lens barrel, 10a: mounting surface,
11: Opening window, 12: Screw hole, 13: Positioning boss, 15: Temperature sensor, 16: Opening window, 17: Window hole of flexible wiring board

Claims (6)

[Claims] 1. A printed wiring film in which an electronic device component mounted on a flexible wiring board is directed toward an equipment structure, and the flexible wiring board is attached to the equipment structure, wherein the electronic device is mounted on one surface of the flexible wiring board. A printed wiring film on which a component and a chip component are mounted, wherein the flexible wiring board is folded in two from a folded portion, and the electronic device component is mounted on the flexible wiring board so as to face the device structure. 2. The printed wiring film according to claim 1, wherein the flexible wiring board folds the electronic device component and the chip component outward from a folded portion, and folds the electronic device component toward the device structure. Printed wiring film characterized in that it is mounted facing. 3. The printed wiring film according to claim 1, wherein the flexible wiring board folds the electronic device component and the chip component inward from a folded portion inward from a window hole opened in the flexible wiring board. A printed wiring film, wherein the electronic device component is inserted outside and attached to the device structure side. 4. The printed wiring film according to claim 1, wherein the folded portion has a narrow width and a narrow portion is formed in the folded portion. 5. The printed wiring film according to claim 1, wherein the folded flexible wiring board is fastened to the device structure together with a fixing screw. 6. The printed wiring film according to claim 1, wherein the folded flexible wiring board is inserted and positioned in a boss provided on the device structure side.