JP2010205774A - Flexible wiring board and optical device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible wiring board which ensures the number of printed wirings, improves flexibility and followability etc. and achieves a narrow width and miniaturization. <P>SOLUTION: The flexible wiring board includes: a planar base region 61 connected to a first connection constituent, planar end regions 62, 63 connected to a second connection constituent, and a planar long flexible region connecting the base region to the end regions and having flexibility. The long flexible region includes a plurality of branches 64, 65 branching from the base region and extending and each defining the end region, and the plurality of branches 64, 65 are formed so as to be superimposed to each other and extend. According to this structure, the width dimension of the flexible wiring board can be suppressed to be small while providing a plurality of printed wirings, and flexibility and elasticity are improved to easily disposing the printed wirings even in a small space. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a flexible wiring board applied to wiring of an electronic device or the like and an optical device using the flexible wiring board, and more particularly to a movable element of a lens optical system mounted on a camera, a video camera, a projector, or the like. The present invention relates to a flexible wiring board and an optical device to which are connected.

As a conventional flexible wiring board, one end of a lens barrel of a camera is fixed to a base (fixed element), the other end is connected to a movable lens group (movable element), and the movable lens group moves in the optical axis direction. A device provided with a plurality of folded portions in the middle to allow it to be performed is known (see, for example, Patent Document 1 and Patent Document 2).
This flexible wiring board is a flexible printed board on which a plurality of wirings are printed on one side, and the width dimension thereof is increased as the number of printed wirings increases. However, when a wide flexible wiring board is used, the flexibility is lowered and it becomes difficult to bend, so that the driving load of the movable element increases. In addition, the space for accommodating the flexible wiring board is increased, which leads to an increase in the size of the lens barrel and the apparatus that accommodates the flexible wiring board.

As another flexible wiring board, a wide flexible wiring board is provided with a plurality of slits and cuts extending in the longitudinal direction to facilitate bending and reduce the load resistance of the movable element. Known (see, for example, Patent Document 3 and Patent Document 4).
However, even if flexibility is improved by providing slits and notches, it is still difficult to arrange in a narrow space due to the large width of the flexible wiring board, increasing the accommodation space, equipment, etc. The problem of larger size is not solved.
On the other hand, it is conceivable to reduce the width of the printed wiring board and provide printed wiring on both sides, but although the width dimension can be reduced, the thickness dimension increases and flexibility decreases (becomes difficult to bend). ), As described above, the driving load when driving the movable element is increased, and wiring becomes difficult.

JP 2004-163748 A JP 2007-093907 A JP 2007-043129 A JP 2003-141755 A

  The present invention has been made in view of the above circumstances, and the object of the present invention is to improve flexibility and flexibility while providing a plurality of printed wirings, and to be easily disposed in a narrow space. An object of the present invention is to provide a flexible wiring board that contributes to downsizing of the apparatus and the like, and an optical apparatus using the same.

The flexible wiring board of the present invention can connect the flat base region connected to the first connection element, the flat end region connected to the second connection element, and the base region and the end region. A flexible wiring board having a flexible plate-like long flexible portion region, wherein the long flexible portion region branches from the base region and extends, and defines a plurality of end regions. It consists of branch branches, and the plurality of branch branches are formed so as to overlap each other and extend.
According to this configuration, the long flexible portion region is formed as a plurality of branch branches, and the plurality of branch branches are formed to extend so as to overlap with each other. The width dimension of the flexible wiring board can be kept small, and each branch branch is not joined, but is independent. Therefore, flexibility and flexibility can be improved, and it is easy even in a narrow space. It can be arranged.
Therefore, when the first connection element is a fixed element and the second connection element is a movable element, the followability of the flexible wiring board is improved, so that the load when the movable element moves can be reduced. In addition, it is possible to reduce the size of the apparatus or the like that accommodates the flexible wiring board.

In the flexible wiring board having the above-described configuration, the plurality of branch branches include a configuration including at least one main branch branch directly extending from the base region and at least one sub-branch branch folded over the main branch branch. Can do.
According to this configuration, when the flexible wiring board is formed from a flat plate material by punching or the like, the base region and the plurality of branch branches (at least one main branch branch) branch from the base region and each define an end region. The flexible wiring board of the present invention can be easily obtained by bending the other main branch branch so that the other main branch branch is folded on the main main branch branch. it can.

In the flexible wiring board configured as described above, the base region, the end region, and the long flexible region are provided with printed wiring only on one side, and the sub-branch is at least twice in the vicinity of the base region. A configuration including a bent portion to be bent can be adopted.
According to this configuration, the flexible wiring board including the base region, the end region, and the long flexible region is provided with the bent portion where the secondary branch is bent at least twice in a state where the printed wiring is provided only on one surface thereof. Therefore, the secondary branch can be easily folded over the main branch while ensuring the flexibility of the secondary branch.

An optical device of the present invention is an optical device including a fixed element, a movable element including a lens optical system, and a wiring element connected between the fixed element and the movable element. It is any one of the flexible wiring boards which comprise a structure.
According to this configuration, it is possible to reduce the load resistance when the movable element moves because the flexible printed circuit board can be narrow and the flexibility and flexibility can be improved while providing a plurality of printed wirings. Moreover, the downsizing of the apparatus can be achieved.

  According to the flexible wiring board having the above configuration, flexibility and flexibility can be improved while providing a plurality of printed wirings, which can be easily disposed in a narrow space, contributing to downsizing of the optical device and the like. A flexible wiring board can be obtained.

It is sectional drawing of the optical apparatus to which the flexible wiring board based on this invention is applied. FIG. 2 is a perspective view of an image touch correction unit included in the optical device shown in FIG. 1. FIG. 3 is an exploded perspective view of the image touch correction unit shown in FIG. 2. It is a perspective view which shows the flexible wiring board applied to the image touch correction unit shown in FIG.2 and FIG.3. FIGS. 2A and 2B show a flexible wiring board applied to FIGS. 2 and 3, wherein FIG. 2A is a developed plan view before the bending process, and FIG. 2B is a plan view in a state where the bending process is performed. . FIG. 2 shows another embodiment of the flexible wiring board according to the present invention, (a) is a development plan view of the flexible wiring board before the bending process, and (b) is a state in which the bending process is performed. It is a top view of a flexible wiring board. FIG. 5 shows still another embodiment of the flexible wiring board according to the present invention, wherein (a) is a development plan view of the flexible wiring board before the bending process, and (b) is a state where the bending process is performed. It is a top view of this flexible wiring board.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, this optical device is fixed to a case 1 as a fixed element, a prism 2 fixed to the case 1 and a case 1 to change the optical path to an optical axis L2 that advances the optical axis L1 in a perpendicular direction. Image blur correction as a movable element group 3 that holds the lens G1 and the lens G2 and is driven in the direction of the optical axis L2, and a movable element that holds the lens optical system (lenses G3, G4, and G5) and is driven in the direction of the optical axis L2. Unit U, flexible wiring board 60 as a wiring element having an end region connected to image blur correction unit U, lens G6 fixed to case 1, filter 4 fixed to case 1, and imaging fixed to case 1 A CCD 5 as an element, a drive unit (not shown) provided in the case 1 for driving the movable lens group 3 in the direction of the optical axis L2, and an image blur correction unit U provided in the case 1 for the optical axis L2. Driving units for driving the direction (not shown), and a control unit as a first connecting element that is fixed to the case 1 (fixed element) (not shown) or the like.

2 and 3, the image blur correction unit U includes a fixed frame 10, a cover frame 20, a movable frame 30, a first drive mechanism 40 (a first drive magnet 41, a first coil as a second connection element). 42, first yokes 43, 44), second drive mechanism 50 (second drive magnet 51, second coil 52 and second yokes 53, 54 as second connection elements), return magnet 70 (first return). A magnet 71, a second return magnet 72), a magnetic sensor 80 (first magnetic sensor 81, second magnetic sensor 82) and the like are provided.
And the flexible wiring board 60 is connected with respect to the 1st coil 42 and the 2nd coil 52 as a 2nd connection element (movable element). In addition, although the same flexible wiring board is connected also about the magnetic sensor 80 (81, 82), since it is the same structure, it abbreviate | omits.

As shown in FIGS. 2 and 3, the fixed frame 10 is substantially flat in the direction of the optical axis L <b> 2, and includes an opening 11 centered on the optical axis L <b> 2 and a guided shaft that extends in the direction of the optical axis L <b> 2. The parts 12 and 13 are provided with an abutting part 14 with which a nut screwed into a lead screw included in the drive unit abuts.
As shown in FIG. 3, the first drive magnet 41 and the first yoke 43, the second drive magnet 51 and the second yoke 53 are fitted and fixed to the fixed frame 10 on both sides of the opening 11. ing.

As shown in FIG. 3, the cover frame 20 is disposed so as to sandwich the movable frame 30 in the direction of the optical axis L2 and is fixed to the fixed frame 10 with screws B, and a circular notch 21 is formed at the center thereof. I have.
The first magnetic sensor 81 and the second magnetic sensor 82 are fitted and fixed to the cover frame 20 on both sides of the notch 21.

As shown in FIG. 3, the movable frame 30 is substantially flat except for a part in the direction of the optical axis L2, and includes a cylindrical holding portion 31 that holds the lenses G3, G4, and G5 around the optical axis L2. Yes.
The first coil 42 and the first return magnet 71, the second coil 52 and the second return magnet 72 are fitted and fixed to the movable frame 30 on both sides of the holding portion 31.
The movable frame 30 is sandwiched between the fixed frame 10 and the cover frame 20 and moves within a predetermined range by a support mechanism (for example, a sliding surface, a plurality of balls, etc.) in a plane perpendicular to the optical axis L2. It is supported freely.

The first drive mechanism 40 and the second drive mechanism 50 control the energization to the first coil 42 and the second coil 52, thereby generating a magnetic circuit and a first one generated between the first coil 42 and the first drive magnet 41. A magnetic circuit generated between the two coils 52 and the second driving magnet 51 generates a driving force for driving the movable frame 30 in a plane perpendicular to the optical axis L2.
The first return magnet 71 and the second return magnet 72 center the movable frame 30 in the resting state by magnetic attraction and repulsion between the first drive magnet 41 and the second drive magnet 51 facing each other. The lens G3, G4, G5 is returned (centered) to a position where the optical axis L2 of the lens G3 coincides with the center of the opening 11.
The first magnetic sensor 81 is configured to detect the position of the movable frame 30 by the relative movement of the first return magnets 71 arranged to face each other.
The second magnetic sensor 82 detects the position of the movable frame 30 by the relative movement of the second return magnets 72 arranged to face each other.

  As shown in FIGS. 3 and 4, the flexible wiring board 60 connects the flat base region 61, the flat end regions 62 and 63, the base region 61 and the end regions 62 and 63, and is flexible. A plurality of (two in this case) branch branches 64 and 65 as a plate-like long flexible part region, and a bent part 66 provided on the branch branch 65 are provided.

The base region 61 is connected to a control unit or the like as a first connection element that is a fixed element fixed to the case 1.
The end region 62 is connected to a first coil 42 as a second connection element included in the image blur correction unit U that is a movable element.
The end region 63 is connected to a second coil 52 as a second connection element included in the image blur correction unit U that is a movable element.
The branch branch 64 is a main branch branch that extends directly (without being bent) from the base region 61, and defines an end region 62 on the distal end side thereof.
The branch branch 65 is a secondary branch superimposed on the branch branch (main branch branch) 64, and includes a bent portion 66 that is bent twice in the vicinity of the base region 61. Branch) 64 is folded over.
That is, the branch branch (main branch branch) 64 and the branch branch (secondary branch branch) 65 are formed so as to overlap each other and extend.

  The flexible wiring board 60 is provided with as many printed wirings as necessary from the base region 61 through the branch branches 64 to the end region 62 only on one surface of the substrate. As many printed wirings as necessary are provided from 61 to the end region 63 through the bent portion 66 and the branch branch 65.

When the flexible wiring board 60 is manufactured, first, as shown in FIG. 5A, a flat plate material serving as a base material is punched and the base region 61, the branch branch 64, and the end region 62 are formed. The branch branch 65 and the end region 64 and the bent portion 66 are defined. Here, the bent portion 66 is formed so as to be curved or bent as a whole, and is provided at a predetermined interval from the valley fold line 66a and the valley fold line 66a provided at the base portion of the base region 61. It is formed so as to include a mountain fold line 66b.
Then, in the folding portion 66, valley folding is performed along the valley folding line 66a, and then, mountain folding is performed along the mountain folding line 66b. A branch branch (secondary branch) 65 is folded over the branch branch 64.
Here, since the branch branch (secondary branch) 65 includes a bent portion 66 that is bent at least twice in the vicinity of the base region 61, while ensuring the flexibility of the branch branch (secondary branch) 65, The branch branch (secondary branch branch) 65 can be easily folded into the branch branch (main branch branch) 64.

As described above, the long flexible portion region connecting the base region 61 and the end regions 62 and 63 is formed as a plurality of branch branches 64 and 65, and the plurality of branch branches 64 and 65 overlap each other. Therefore, the width of the flexible wiring board 60 can be reduced (about half) while providing a plurality of printed wirings, and the branch branches 64 and 65 are joined. Since it is independent rather than, flexibility and softness can be improved, and it can be easily arranged even in a narrow space.
Therefore, when the flexible wiring board 60 is connected between the control unit that is a fixed element and the image blur correction unit U that is a movable element, the flexibility and flexibility are sufficiently secured and the followability is improved. Therefore, it is possible to reduce the load when the image blur correction unit U moves in the direction of the optical axis L2. In addition, when the flexible wiring board 60 is accommodated in the case 1, the flexible wiring board 60 can be easily arranged, and the case 1 can be reduced in size.

FIG. 6 shows another embodiment of the flexible wiring board according to the present invention.
As shown in FIG. 6, the flexible wiring board 160 in this embodiment includes a flat base portion 161 connected to the first connection element, and a flat plate-like long flexible portion region extending from the base region 161. A plurality of (four in this case) branch branches 162, 163, 164, 165, and flat ends defined in the tip regions of the branch branches 162, 163, 164, 165 and connected to the second connection element Bending parts 166, 167 and the like provided in the partial areas 162a, 163a, 164a, 165a and the branch branches 164, 165, respectively, are provided.

The base region 161 is connected to a first connection element that is a fixed element.
The end regions 162a, 163a, 164a, 165a are each connected to a second connection element that is a movable element.
The branch branches 162 and 163 are main branch branches that extend directly (without being bent) from the base region 161.
The branch branch 164 is a secondary branch that is superimposed on the branch branch (main branch branch) 162, and includes a bent portion 166 that is bent twice in the vicinity of the base region 161, and the bent portion 166 causes the branch branch (main branch) to be bent. Branches) 162 are folded over.
That is, the branch branch (main branch branch) 162 and the branch branch (secondary branch) 164 are formed so as to overlap each other and extend.
The branch branch 165 is a secondary branch that is superimposed on the branch branch (main branch branch) 163, and includes a bent portion 167 that is bent twice in the vicinity of the base region 161, and the bent portion 167 causes the branch branch (main branch) to be bent. Branch) 163 is folded.
That is, the branch branch (main branch branch) 163 and the branch branch (secondary branch) 165 are formed so as to overlap each other and extend.

  In the flexible wiring board 160, as many printed wirings as necessary are provided from the base region 161 to the end region 162a through the branch branch 162 only on one surface of the substrate. As many printed wirings as necessary are provided from the branch region 163 to the end region 163a, and as many as necessary from the base region 161 to the bent region 166 and the branch branch 164 to the end region 164a. Printed wiring is provided, and as many printed wirings as necessary are provided from the base region 161 to the end region 165a through the bent portion 167 and the branch branch 165.

When manufacturing the flexible wiring board 160, first, as shown in FIG. 6A, a base plate 161, a branch branch 162 (and an end region) are subjected to punching or the like on a flat plate material serving as a base material. 162a), the branch branch 163 (and the end region 163a), the branch branch 164 (and the end region 164a), the bent portion 166, the branch branch 165 (and the end region 165a), and the bent portion 167 are formed. .
Here, the bent portions 166 and 167 are formed so as to be curved or bent as a whole, and at predetermined intervals from the valley fold lines 166a and 167a and the valley fold lines 166a and 167a provided at the base portion of the base region 161. It is formed so as to include mountain fold lines 166b and 167b provided with a gap.

Then, in the bent portion 166, valley folding is performed along the valley folding line 166a, and then, mountain folding is performed along the mountain folding line 166b. A branch branch (secondary branch) 164 is folded over the branch branch 162.
Further, in the bent portion 167, valley folding is performed along the valley folding line 167a, and then mountain folding is performed along the mountain folding line 167b. A branch branch (secondary branch) 165 is folded over the branch branch 163.
Here, since the branch branches 164 and 165 include the bent portions 166 and 167 bent at least twice in the vicinity of the base region 161, the flexibility of the branch branches (second branch branches) 164 and 165 is ensured. The branch branches (secondary branches) 164 and 165 can be easily folded on the branch branches (main branch branches) 162 and 163, respectively.

As described above, the long flexible portion region connecting the base region 161 and the end regions 162a, 163a, 164a, 165a is formed as a plurality of branch branches 162, 163, 164, 165, and a plurality of branch branches. Since 162, 164 or branch branches 163, 165 are formed so as to overlap each other, the width dimension of the flexible wiring board 160 can be reduced (about half) while providing a plurality of printed wirings. In addition, since the branch branches 162 and 164 or the branch branches 163 and 165 are independent rather than joined, the flexibility and flexibility can be increased, and the branch branches 162 and 164 can be easily disposed even in a narrow space. be able to.
Therefore, when the flexible wiring board 160 is connected between the fixed element and the movable element of the optical device, the flexibility and flexibility are sufficiently secured and the followability is improved, so that the movable element moves. The load at the time can be reduced. Further, when the flexible wiring board 160 is accommodated in the apparatus, the flexible wiring board 160 can be easily arranged, and the apparatus can be reduced in size.

FIG. 7 shows still another embodiment of the flexible wiring board according to the present invention.
As shown in FIG. 7, the flexible wiring board 60 ′ in this embodiment includes a flat base region 61 ′, flat end regions 62 ′ and 63 ′, a base region 61 ′, and end regions 62 ′ and 63. ′ And a plurality of (here, two) branch branches 64 and 65 as a long plate-like flexible part region having flexibility and a bent part 66 provided on the branch branch 65, and the like. Yes.
The procedure for folding the branch branch (secondary branch branch) 65 into the branch branch (main branch branch) 64 is the same as described above, and the description thereof is omitted.

The flexible wiring board 60 'has a base region 61' connected to the CCD 100 as a first connection element as a movable element, and end regions 62 'and 63' as second connection elements (for example, fixed elements). And a control unit of the optical device).
Thus, even when the base region 61 ′ is connected to the movable element and the end regions 62 ′ and 63 ′ are connected to the fixed element, the flexibility and flexibility of the flexible wiring board 60 ′ are the same as described above. Therefore, the load when the movable element moves can be reduced. Further, when the flexible wiring board 60 'is accommodated in the apparatus, the flexible wiring board 60' can be easily arranged, and the apparatus can be reduced in size.

In the above-described embodiment, the flexible wiring board 60 employs one branch branch 64 as the main branch branch and one branch branch 65 as the secondary branch branch. However, the present invention is not limited to this. Two or more branch branches may be adopted as the branch branch.
In the above-described embodiment, the flexible wiring board 160 has two branch branches 162 and 163 as main branch branches and one branch branch 164 and 165 as secondary branch branches. However, the present invention is limited to this. Instead of this, two or more branch branches may be adopted as sub-branch branches that are superimposed on the branch branches (main branch branches) 163 and 164, respectively. Three or more main branch branches may be employed.

In the above embodiment, an optical device including the image blur correction unit U is shown as an optical device in which this flexible wiring board is adopted. However, the present invention is not limited to this, and an optical device including other movable elements is used. Can also be applied.
In the above embodiment, when the base region of the flexible wiring board is connected to the fixed element and the end region is connected to the movable element, or the base region of the flexible wiring board is connected to the movable element, and the end region is Although the case where it is connected to the fixed element is shown, the present invention is not limited to this, and both the base region and the end region may be connected only to the fixed element or only the movable element.

  As described above, the flexible wiring board of the present invention can improve flexibility and flexibility while providing a plurality of printed wirings, and can be easily disposed in a narrow space. Of course, the present invention can be applied to other optical devices and the like, and is useful for other electronic devices that require other electrical connections and require downsizing.

L1, L2 Optical axes G1, G2, G3, G4, G5, G6 Lens 1 Case (fixed element, first connecting element)
2 Prism 3 Movable lens group 4 Filter 5,100 CCD
U Image touch correction unit (movable element)
DESCRIPTION OF SYMBOLS 10 Fixed frame 11 Opening part 12, 13 Guide part 14 Contact part 20 Cover frame 21 Notch part 30 Movable frame 31 Holding part 40 1st drive mechanism 41 1st drive magnet 42 1st coil (2nd connection element)
43, 44 First yoke 50 Second drive mechanism 51 Second drive magnet 52 Second coil (second connection element)
53, 54 Second yoke 60, 60 ', 160 Flexible wiring board 61, 61', 161 Base region 62, 62 ', 63, 63', 162a, 163a, 164a, 165a End region 64, 162, 163 Branch branch (Main branch)
65,164,165 Branch (secondary branch)
66,166,167 Folded portions 66a, 166a, 167a Valley fold lines 66b, 166b, 167b Mountain fold line 70 Return magnet 71 First return magnet 72 Second return magnet 80 Magnetic sensor 81 First magnetic sensor 82 Second magnetic sensor

Claims (4)

A flat base region connected to the first connection element, a flat end region connected to the second connection element, a flat plate shape that connects the base region and the end region and has flexibility A flexible wiring board comprising: a long flexible part region;
The elongate flexible portion region includes a plurality of branch branches that branch out from the base region and extend and define the end regions, respectively.
The plurality of branch branches are formed to extend so as to overlap each other,
A flexible wiring board characterized by that. The plurality of branch branches include at least one main branch branch extending directly from the base region and at least one sub-branch branch folded over the main branch branch.
The flexible wiring board according to claim 1. The base region, the end region, and the long flexible region are provided with printed wiring only on one side,
The secondary branch includes a bent portion that is bent at least twice in the vicinity of the base region.
The flexible wiring board according to claim 2. An optical device comprising a fixed element, a movable element including a lens optical system, and a wiring element connected between the fixed element and the movable element,
The wiring element is a flexible wiring board according to any one of claims 1 to 3.
An optical device.

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