JPH1070344A - Flexible wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of a bending or a disconnection of a flexible wiring board due to the twist or the like of the board by a method wherein a hole for reducing the effect of a reaction force, which is generated at the time of the movement of a moving body along the longitudinal direction of the wiring board, is formed in the wiring board. SOLUTION: A long hole 160 is formed in a flexible wiring board 33 from the vicinity of one end side 33a to the side in the vicinity of the other end side 33b along the longitudinal direction of the board 33. By forming the hole 160 in such a way, the board 33 twists in the case where a lens barrel 6 is moved in the panning direction P centered around a vertical axis VL, but at this time, the generation of the twist is for make it possible to reduce a reaction force to this twist. By reducing this reaction force, a disconnection of the board 33 due to the twist of the board 33 can be prevented from being generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a flexible wiring board used for, for example, a video camera for electrically connecting a moving body to a fixed body or a moving body.

[0002]

2. Description of the Related Art A flexible wiring board (also referred to as a flexible printed wiring board) is used when a moving body is electrically connected to a fixed body or when moving bodies are electrically connected to each other. This is a wiring board utilizing flex resistance.

[0003]

A flexible wiring board of this type is used, for example, to electrically connect a moving body to a fixed-side connection board, and contributes to miniaturization and thinning of equipment. I have. FIG. 11 shows a usage example of a conventionally used flexible wiring board 300. One end of the flexible printed circuit board 300 is connected to the operation unit 301 of the video camera.
The other end of the flexible wiring board 300 is connected to the fixed-side board 302. The operation unit 301 moves along the tilting direction T about the axis HL, and moves along the axis VL in the panning direction P. The operation unit 301 includes the lens 30
4 when the operation unit 301 moves in the panning direction P.
As a characteristic of 0, the flexible printed wiring board 300 does not bend or break particularly, since it follows the movement well and has high bending resistance.

However, when the operating section 301 moves in the tilting direction T along the axis HL, one end 300a of the flexible wiring board 300 is twisted at an angle θ with respect to the other end 300b as shown in FIG. When such an operation is repeated, the flexible wiring board 300 is liable to be disconnected. Therefore, an object of the present invention is to solve the above problems and to provide a flexible wiring board capable of preventing bending or disconnection due to kinking or the like.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a flexible wiring board for electrically connecting a moving body to a fixed body or a moving body. This is attained by a flexible wiring board in which a hole for reducing the effect of the reaction force generated at the time of moving is formed. In the present invention, since the holes are formed in order to reduce the influence of the reaction force generated when the moving body moves along the longitudinal direction of the flexible wiring board, even if the flexible wiring board is twisted, Can be reduced, and disconnection due to kinking of the flexible wiring board can be prevented.

[0006]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIGS. 1 and 2 show an example of a video camera apparatus provided with a flexible wiring board (also called a flexible printed board) of the present invention. In FIG. 1, a video camera device 1 is connected to a computer CP. The computer CP supplies a control signal to the video camera 1 so that the lens 1 of the video camera device 1
0 is directed in a predetermined direction. This type of video camera device 1 can selectively photograph each participant during a conference, for example. Alternatively, this kind of video camera 1 can of course be used for security monitoring.

In the embodiment, the present invention will be described with respect to a gimbal mechanism having a so-called cantilever support structure.
The present invention is not limited to this, and can be applied to a gimbal mechanism having a so-called doubly supported structure.

A video camera apparatus 1 shown in FIG. 2 has a box-shaped outer casing 2 having an opening 2a at a front end (the photographing direction is the front), and a front cover 3 covering the opening 2a of the outer casing 2 is provided. It is formed of a transparent material.

In a space 4 defined by the outer casing 2 and the front cover 3, a metal chassis 5 is provided on the inner bottom surface of the outer casing 2.
Is fixed, and a lens barrel 6 and its support mechanism 7 are arranged on the front side of the chassis 5.

The lens barrel 6 shown in FIG. 2 has a rectangular cylindrical shape, and is provided with a photographic lens system, a movable lens driving unit, an imaging unit, and the like. A flange 8 is integrally formed at the front end of the lens barrel 6. A cylindrical portion 9 is provided at the center of the flange 8 toward the front, and a lens 10 constituting a part of the taking lens system is located in the cylindrical portion 9. A substrate 11 is fixed to the rear end of the lens barrel 6, and a solid-state imaging device (CCD) 12 is attached to the substrate 11 to form an imaging unit.

The lens barrel 6 shown in FIG. 2 is supported by a support mechanism 7 which, as shown in the side view of FIG. 3 and FIG.
A tilting mechanism 13 for tilting in the tilting direction T about L and a panning mechanism for rotating the lens barrel 6 in a panning direction P about a vertical axis VL as shown in the plan view of FIG. 14 is provided.

A tilting mechanism 13 shown in FIG. 3 has a substantially inverted L-shape as viewed from the front, and a support member 15 for pivotally supporting the center of the right side plate of the lens barrel 6, and a vertical direction of the support member 15. , And a motor 16 interposed between the lens barrel 6 and the lens barrel 6. The motor 16 rotates the lens barrel 6 about its horizontal axis HL.

The motor 16 shown in FIG. 8 includes a stator 17 fixed to a vertical plate 15v of a support member 15 and a stator 1
Rotor part 1 arranged opposite to lens 7 and fixed to lens barrel 6
8 and so on.

8 includes a stator substrate 19 fixed to a vertical plate 15v of a support member 15, a bearing portion 20 fixed to penetrate the stator substrate 19 and the vertical plate 15v, and a bearing portion. And a plurality of stator coils (driving coils) 21, 21,...

The rotor portion 18 shown in FIG. 8 is arranged to face the stator coils 21, 21,... Of the stator portion 17, and a ring in which a large number of S poles and N poles are alternately magnetized in the circumferential direction. , A flat iron rotor case 23 having a disk-like shape and having a short peripheral wall on its outer peripheral edge and supporting the rotor magnet 22, and a rotor case 23.
And a support shaft 24 protruding from the center of the shaft.

The support shaft 24 of the rotor portion 18 shown in FIG.
In addition, the rotor unit 18 is rotatably supported by the stator unit 17 via the sleeve 27.

A magnet 28 for detecting the rotation angle is provided on the outer periphery of the rotor case 23.
S poles and N poles are alternately magnetized on the outer peripheral surface at a fine pitch in the circumferential direction.

The lens barrel 6 is a vertical plate 15 of the support member 15.
v so that the stator coils 21 and
By supplying a drive current to the motor 21, a rotational force is generated in the rotor magnet (drive magnet) 22, and the lens barrel 6 can rotate in the tilting direction T together with the rotor 18.

Next, the panning mechanism 14 shown in FIG. 4 includes a support member 15, a horizontal plate 15 h shown in FIG. 3 which extends horizontally from the lower edge of the vertical plate 15 v of the support member 15 to the left, and the chassis 5. And a motor 30 interposed therebetween.
The support member 15 is moved around the vertical axis VL by the motor 30.
And the lens barrel 6 is rotated.

The motor 30 of FIG. 8 is substantially the same as the motor 16 in its configuration. The motor 30 includes a stator portion 17 fixed to the chassis 5 and a rotor portion 18 rotatably supported by the stator portion 17 and supported on the lower surface of the horizontal plate 15h of the support member 15.

8 includes a stator substrate 19 fixed to the upper surface of the chassis 5 and a stator substrate 19.
And a bearing part 20 fixed so as to penetrate the chassis 5
, And a plurality of stator coils 21, 21,... Disposed on the stator substrate 19 so as to surround the bearing portion 20.

The rotor section 18 shown in FIG. 8 is arranged in a ring shape in which a large number of S poles and N poles are alternately magnetized in the circumferential direction thereof in such a manner as to face the stator coils 21, 21,. , A flat iron rotor case 23 having a disk-shaped outer peripheral edge and having a short peripheral wall and supporting the rotor magnet 22, and a support shaft 24 provided at the center of the rotor case 23. Become.

The rotor case 23 has a rotor magnet 22 fixed thereto and stator coils 21, 21,.
The support shaft 24 of the rotor section 18 is fitted in the bearing 25 of the bearing section 20 of the stator section 17 and is rotatably supported by the stator section 17.

Thus, the lens barrel 6 and the support member 1
5 is rotatably supported by the support member 15 in the panning direction P of FIGS.

A magnet 28 for detecting a rotation angle is provided on the outer peripheral surface of the rotor case 23.
The reference numeral 00 indicates that the S pole and the N pole are alternately magnetized at a fine pitch in the circumferential direction.

When a drive current is supplied to the stator coils 21, 21,... Or 21, 21,... Of the motor 16 or the motor 30 in FIG. By rotating the lens barrel 6 in the pointing direction T or the panning direction P, the attitude of the lens barrel 6 can be controlled in the space 4 of the outer casing 2.

Next, the flexible wiring board 33 shown in FIG. 2 will be described. As shown in FIGS. 5 and 6, the flexible wiring board 33 electrically connects the circuit board 32 including the drive circuit and the substrate 11 on the lens barrel 6 side. That is, one end 33a of the flexible wiring board 33
Is electrically connected to the substrate 11 via the connector 33c. The other end 3 of the flexible wiring board 33
3b is also electrically connected to the circuit board 32 via the connector 33d. The circuit board 32 has a connection cord 34
Is electrically connected to the computer CP in FIG.

The reason why the flexible wiring board 33 is provided between the lens barrel 6 and the fixed circuit board 32 is that the posture of the lens barrel 6 is changed by the tilting mechanism 13 and the panning mechanism 14. For this reason, it is necessary to electrically connect the lens barrel 6 and the circuit board 32 so as to follow the distance that changes according to the distance. This flexible wiring board 33 is shown in FIG.
6 and 7 show an example thereof. As the laminated structure of the flexible wiring board 33, a structure of a single-sided flexible wiring board in which a copper foil, a coverlay adhesive, a coverlay film, and the like are laminated on a base film can be adopted. Alternatively, as the flexible wiring board 33, a double-sided structure or the like in which a copper foil is arranged on both sides of a base film and an adhesive and a coverlay film are respectively laminated on the copper foil can be adopted.

As shown in FIGS. 5 to 7, the flexible wiring board 33 has a long hole 160 formed along the longitudinal direction L thereof. The long hole 160 is formed from the vicinity of one end 33a to the vicinity of the other end 33b along the longitudinal direction L of the flexible wiring board 33. Thus, hole 16
The reason for forming 0 is that the lens barrel 6 in FIG.
Is moved in the panning direction P about the vertical axis VL, the flexible wiring board 33 is twisted. At this time, the reaction force against the twist can be reduced. By reducing this reaction force, disconnection due to twisting of the flexible wiring board 33 can be prevented. In particular, even when the lens barrel 6 frequently moves in the panning direction P, the flexible wiring board 33 can prevent disconnection of the flexible wiring board 33, and can prevent disconnection failure of the video camera device 1. .

One end 33a of the flexible wiring board 33
As shown in FIG. 7, the motors 16 and 30 and the CCD
12 are electrically connected. On the other hand, the other end 33 b of the flexible wiring board 33 is electrically connected to the circuit board 32. Thereby, the video signal S1 obtained by the CCD 12
Can be sent to the circuit board 32 through the flexible wiring board 33. The circuit board 32 can send control signals S2 and S3 to the motors 16 and 30.

Next, referring to FIGS. 9 and 10, FIGS. 9 and 10 correspond to FIG.
3 shows another embodiment of the present invention. 9 has a plurality of holes 26 along its longitudinal direction.
0, 260, 260 are formed. That is, the plurality of holes 260 are arranged in series along the longitudinal direction L of the flexible wiring board 33. By arranging the plurality of holes 260 in this manner, even if the lens barrel 6 of FIG.
No disconnection occurs due to the kinking 33. The flexible wiring board 333 of FIG. 10 has a plurality of circular holes 360. These holes 360 are arranged in series along the longitudinal direction L.

As described above, in the embodiment of the present invention, the connection of the flexible wiring board can be freely set in the direction in which the lens barrel 6 as the operating unit moves, so that the degree of freedom of design is increased. growing. This is because
As described above, in the arrangement example of the flexible wiring board 33 shown in FIG. 5, even if the lens barrel 6 is repeatedly moved in the panning direction P, the flexible wiring board 33 reduces the reaction force due to the torsion and breaks the flexible wiring board 33. This is because it can be prevented. Of course, when the lens barrel 6 moves in the tilting direction T, there is no problem because the flexible wiring board 33 can freely follow the movement.

As shown in FIG. 5, the lens barrel 6 freely moves in two directions, a tilting direction T and a panning direction P.
Although it is a flexible wiring board 33 having a simple structure, electrical connection is reliably performed, and no disconnection occurs during the operation. Moreover, since the area occupied by the flexible wiring board is reduced, the size of the entire system can be reduced. That is, unless the embodiment of the present invention is adopted,
It is necessary to use a wiring of a flexible wiring board which does not have a state as in the conventional example of FIG. 12, and it is necessary to make the flexible wiring board substantially L-shaped as shown in FIG. 13 or two flexible wiring boards as shown in FIG. Substrate 60
0,700 and the relay board 800.

However, in the case of the conventional example shown in FIG. 13, the portion a of the flexible wiring board corresponds to the movement in the Y and Z directions,
The portion b corresponds to the movements in the X direction and the Z direction, which makes it difficult to reliably prevent the state of FIG. Further, in the case of the conventional example shown in FIG. 14, the relay substrate 8 which operates the flexible wiring substrate 700 only in one direction from the fixed side 750
00, and then to the next operation board 850 that performs a different operation again. In both cases of FIGS. 13 and 14, the space occupied by the flexible wiring board is larger than that of the embodiment of the present invention.

The present invention is not limited to the above embodiment. For example, in the embodiment described above, the electrical connection between the lens barrel, which is the movable section (operating section) of the video camera, and the circuit board 32 on the fixed section side is made by a flexible wiring board. The present invention is not limited to this, and the flexible wiring board of the present invention can be used for electrical connection between a movable unit (also referred to as a moving unit or an operating unit) and the moving unit. The flexible wiring board of the present invention can be applied not only to a video camera but also to other types of electrical equipment, for example, when an electrical connection is made between an optical pickup and a main body of an optical disk device.

[0037]

As described above, according to the present invention,
It is possible to prevent bending or disconnection due to kinking or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a video camera provided with a flexible wiring board of the present invention.

FIG. 2 is a side view showing the inside of the video camera of FIG. 1;

FIG. 3 is a diagram showing a tilting operation of a lens barrel of the video camera.

FIG. 4 is a diagram showing a panning operation of a lens barrel of the video camera.

FIG. 5 is a perspective view showing an example of a flexible wiring board provided between the lens barrel of the video camera and the fixed portion side.

FIG. 6 is a perspective view of FIG. 5 as viewed from the rear.

FIG. 7 is a plan view showing an example of a flexible wiring board.

FIG. 8 is a diagram showing a tilting motor (also called an actuator) and a panning motor (also called an actuator) of the video camera.

FIG. 9 is a diagram showing another embodiment of the flexible wiring board of the present invention.

FIG. 10 is a diagram showing another embodiment of the flexible wiring board of the present invention.

FIG. 11 is a view showing a flexible wiring board provided in a conventional video camera.

FIG. 12 is a view showing a problem of the conventional flexible wiring board in FIG. 11;

FIG. 13 is a diagram showing an example of another conventional flexible wiring board.

FIG. 14 is a diagram showing an example of another conventional flexible wiring board.

[Explanation of symbols]

Reference numeral 6 denotes a lens barrel (also referred to as a moving body, a movable portion, or an operating portion), 32 denotes a circuit board (fixed body), 33 denotes a flexible wiring board, 160 denotes a hole.

Claims (3)

[Claims] 1. A flexible wiring board for electrically connecting a moving body to a fixed body or a moving body, wherein a hole for reducing an influence of a reaction force generated when the moving body moves along a longitudinal direction. A flexible wiring board characterized by being formed. 2. The flexible wiring board according to claim 1, wherein the hole is formed over substantially the entire length in the longitudinal direction. 3. The flexible wiring according to claim 1, wherein the movable body is a lens barrel of a video camera, the lens barrel performs a panning operation and a tilting operation, and the fixed body is a drive circuit board of the lens barrel. substrate.