JP2001292526A - Connecting device using connecting cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of the movement of a movable part being restrained due to connecting cable, thus inhibiting the flexibility of the movable part, when a fixed part and the movable part are connected through the connecting cable. SOLUTION: A flexible connecting cable 10 is bent triple with virtual center lines L1 and L2. Since the virtual center lines L1 and L2 are orthogonal to each other, connecting parts 10A and 10B are connected with a stationary substrate 1 and a movable substrate 2, and results in the movable substrate 2 having degrees of freedom in three-dimensional direction. Accordingly, the movement of the movable part will not be blocked from being inhibited by the connecting cable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection device which can be connected to a housing and a drive unit without obstructing the movement state, for example, in a case where the drive unit is provided in a movable state in a housing.

[0002]

2. Description of the Related Art It is possible to read and / or read information recorded on a recording medium optically or magnetically, such as on-vehicle electronic equipment, for example, a CD (compact disk), DVD (digital versatile disk), or MD (mini disk) player. In a device for writing, it is necessary to prevent sound skipping that is likely to occur due to mechanical vibration during the running of an automobile. For this reason, in a conventional electronic device, a drive unit equipped with a rotation driving device for rotating a recording medium and a reading device (pickup) for reading data is formed by an elastic support member such as a spring coil or a damper mechanism. Generally, it is elastically supported in the body.

[0003] In this case, the fixed-side substrate fixed in the housing and the movable-side substrate provided in the driving section are connected by a flexible connection cable (flexible cable), and are connected via the connection cable. Power is supplied to the drive unit, and various signals are transmitted and received. The movement of the drive unit is not hindered by the flexibility of the connection cable.

[0004]

Conventionally, as the connection cable for connecting the fixed-side substrate and the movable-side substrate, a cable having an unfolded shape in the form of a strip is used, and this is inverted so that two layers are stacked. In this state, the connection portions at both ends of the connection cable are generally connected to the respective boards.

In the above connection device, when the movable-side substrate moves relative to the fixed-side substrate in a direction perpendicular to the direction in which the virtual center line of the inversion portion of the connection cable extends, the inversion portion is deformed. This is acceptable. However, the connection cable restricts the movement of the fixed-side substrate in the direction in which the virtual center line of the reversing portion extends. Therefore, it is difficult to support the driving unit so as to have a degree of freedom in multiple directions.

An object of the present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a connection device that can allow movement in multiple directions when connecting at least one of the moving parts.

Another object of the present invention is to provide a connection device which does not impair flexibility at the reversing portion when the connection cable is a stack of a wiring sheet and a shield sheet.

[0008]

According to the present invention, there is provided a connecting device in which at least one of the two movable portions is connected by a flexible connecting cable, connecting portions are provided at both ends of the connecting cable. A first inverting portion that inverts around a first virtual center line L1 and a second inversion that inverts around a second virtual center line L2 between the connecting portions. And the first virtual center line L1 and the second virtual center line L2 are both substantially parallel to the surface of the connection cable, and the first virtual center line L1
The first and second inversion portions are formed so as to face in a direction in which the first and second virtual center lines L2 intersect with each other.

For example, a lower portion of the connection cable between one connection portion and the first inversion portion, an intermediate portion between the first inversion portion and the second inversion portion, and a second inversion portion. When the space between the first inversion portion and the second connection portion is located above the lower portion, and the upper portion is located above the intermediate portion when an upper portion is provided between the first inversion portion and the second connection portion. It is deformed so as to be tripled so that a reversal part is formed.

[0010] Further, in the shape in which the connection cable is developed in a planar shape, a first bent portion which is bent at approximately 90 degrees at the lower portion is formed, and the intermediate portion extends in a direction orthogonal to the bending direction of the first bent portion. It is possible that a second bend is formed, which bends at approximately 90 degrees, and that both connections are oriented in opposite directions.

[0011] In this case, it is preferable that the connection cable has a curved shape at the first bent portion and the second bent portion in that the bending stress is not concentrated.

According to the present invention, since the virtual center lines of the two inverted portions are oriented in the direction of intersection, the connecting portion can be freely deformed and moved in each direction on the same plane. In addition, the connection portion can be moved in a direction orthogonal to the cable surface of the connection cable, and movement in three-dimensional directions can be allowed.

According to the present invention, there is provided a connection device in which at least one of the two portions, which is movable, is connected by a connection cable having flexibility. Wherein the connection cable has an inverted portion inverted between the connecting portions, and the adhesive layer is provided in a region other than the inverted portion. It is.

For example, the connection cable has a wiring sheet having connection portions connected to the respective portions at both ends, wiring leads for conducting the two connection portions, and a shield layer covering the wiring leads. And a shield sheet overlaid on the wiring sheet.

However, each of the plurality of sheets may be a wiring sheet. When such a connection cable is used, a plurality of sheets, for example, a wiring sheet and a shield sheet, are not restrained to each other at the inversion portion, and the inversion portion can exhibit flexibility in deformation. The invention relating to the wiring sheet, the shield sheet, and the adhesive layer can be implemented in a connection device in which the connection sheet is bent into a U-shape only by the first inversion portion. The present invention can also be applied to the invention according to claim 1 which is bent into three layers having a second reversing part.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the connecting device of the present invention, FIG. 2 is an exploded plan view of a connecting cable used in the connecting device of FIG. 1, and FIG. 3 shows a process of bending the connecting cable. It is a perspective view.

The electronic apparatus shown in FIG. 1 using the connection device of the present invention is, for example, a DVD (digital versatile disk) drive device for a vehicle. In this electronic device, a fixed substrate 1 is provided in a housing (not shown). A movable portion having a reading and / or writing portion such as an optical head is provided in the housing. FIG. 1 shows a movable substrate 2 provided in the movable section. The movable portion having the movable side substrate 2 is supported by a plurality of elastic support members 3 such as a spring coil and an oil damper in a housing, and when a vehicle body vibration is applied, the reading operation of the movable portion is affected. It does not happen.

A connector 1a is provided on a side surface of the fixed side substrate 1.
The connector 2a is also provided on the side surface of the movable substrate 2 which is on the same side as the connector 1a. The connector 1a and the connector 2a are connected to the connection cable 1
0, the fixed substrate 1 and the movable substrate 2
And can be electrically connected. In addition,
The connector 1 a may be provided on the upper surface of the fixed substrate 1, the connector 2 a may be provided on the lower surface of the movable substrate 2, and the connection cable 10 may be located between the substrates 1 and 2.

The connection cable 10 is a flexible cable (FPC) in which a plurality of copper foil wires (wiring leads) are pattern-formed on an insulating resin film, and the wiring leads are covered with an insulating layer. Alternatively, it may be a so-called flat cable or the like in which covered conductors in which conductors are covered with resin are arranged in parallel and connected to each other.

FIG. 2 shows the unfolded shape of the connection cable 10.
As shown in FIG. 5, the connection portion 10A has a substantially crank shape, and has connection portions 10A and 10B at both ends of which a plurality of copper foil wires are exposed. The connections 10A and 10B are oriented opposite to each other in the X direction.

The connection cable 10 is connected to one of the connection portions 1.
A lower portion 10D is provided between the first inversion portion 10A and the first inversion portion 10b,
An intermediate portion 10E is between the first inversion portion 10b and the second inversion portion 10d, and the second inversion portion 10d and the other connection portion 1
The upper portion 10F is between 0B.

The lower portion 10D is bent by approximately 90 degrees with respect to the direction (X2 direction) in which the connecting portion 10A extends, and Y1
A first bent portion 10a oriented in the direction is formed, and at least one edge of the first bent portion 10a has a curved shape. In the intermediate portion 10E, the second bent portion 10 that is turned by approximately 90 degrees and is directed in the X1 direction.
c is formed. In the second bent portion 10c, at least one edge has a curved shape.

When the edge has a curved shape as described above, it is possible to prevent the bending stress from being concentrated on the edge of the connection cable 10 in a bent state as shown in FIG.

The connection cable 10 is formed so that the width from one connection portion 10A to the other connection portion 10B has substantially the same width dimension W0.

The bending structure of the connection cable 10 is shown in FIG.
As shown in (A), the connection portion 10A of the connection cable 10
The first reversing unit 10 with respect to the
At b, it is bent in the reverse direction (α direction in the figure). At this time, in the first reversing section 10b, the connection cable 10 is reversed by about 180 degrees around the first virtual center line L1. Thereby, the intermediate portion 10E is overlapped with a space above the lower portion 10D.

Next, as shown in FIG. 3B, the connection cable 10 is further bent in the reverse direction (β direction in the drawing) at the second reverse portion 10d. At this time, the second reversing unit 10d makes approximately 180 degrees around the first virtual center line L2.
Inverted. And the upper part 10F is the intermediate part 10
It is superimposed on E with a space.

As shown in FIG. 1, the first inversion unit 10
b and in a state where the second inversion unit 10d has inverted twice,
The connecting portion 10A and the connecting portion 10B are directed in the same Y2 direction. The first virtual center line L1 and the second virtual center line L2 are both substantially parallel to the cable surfaces of the lower part 10D, the middle part 10E, and the upper part 10F, and the first virtual center line L
The first and second virtual center lines L2 are orthogonal to each other.

In the connection cable 10 thus deformed, one connecting portion 10A is connected to the connector 1a of the fixed side substrate 1 and the other connecting portion 1A is connected as shown in FIG.
0B is connected to the connector 1b of the movable substrate 2.

In the electronic device shown in FIG. 1, the second reversing portion 10d is allowed to move around the virtual center line L2 with respect to the moving component of the movable substrate 2 in the X direction, and is allowed to move in the Y direction. With respect to the movement component, the first reversing unit 10b can be allowed to deform around the virtual center line L1. Further, the moving component in the vertical direction (Z direction)
D, the change in the interval in the Z direction between the intermediate portion 10E and the upper portion 10F is acceptable.

Therefore, the connection cable 10 does not hinder the movement of the movable portion in all directions of XYZ. Accordingly, the movable portion is elastically supported by the elastic support member 3 with a degree of freedom in each direction, and does not adversely affect each operating portion on the movable portion with respect to vehicle body vibration.

Since the connection cable 10 can allow movement in three-dimensional directions and can exert elastic force in each direction, the connection cable 10 itself shown in FIG. Can be demonstrated.

FIG. 4 is an exploded perspective view of the connection cable showing the second embodiment, and FIG. 5 is a side view showing a state where the connection cable shown in FIG. 4 is bent.

The connection cable 11 shown in FIGS. 4 and 5
Has a wiring sheet 12 in which a plurality of wiring leads are formed on a resin film by copper foil wires, and the surfaces of the wiring leads are covered with an insulating layer. Connection portions 12A and 12B are formed at both ends of the wiring sheet 12. Both upper and lower surfaces of the wiring sheet 12 are sandwiched between shield sheets 13 each having a shield pattern formed on a resin film.

The shield sheet 13 is composed of two sheets 13A and 13B, and the sheet 13A and the sheet 13B are connected by a hinge (hinge) connecting portion 13a. On each surface of the sheets 13A and 13B, a shield pattern, that is, a conductive pattern having a ground potential is formed substantially all over, and the shield patterns of the sheets 13A and 13B are connected via the connecting portion 13a. It is electrically connected. Further, a convex connection portion 13b is formed on the sheet 13B, and this connection portion 13b is connected to a ground potential portion. Preferably, the surface of the shield pattern is covered with an insulating film.

When the wiring sheet 12 is sandwiched between the sheets 13A and 13B, the wiring leads of the wiring sheet 12 are covered with the shield patterns from both the upper and lower surfaces, and the superposition of noise on the signal of the wiring leads is prevented. Shielded.

As shown in FIG. 4 and FIG.
An adhesive layer 14 is intermittently provided on the inner surfaces of 3A and the sheet 13B. The adhesive layer 14 has an adhesive effect on both sides of the adhesive layer 14, and is formed by, for example, attaching a double-sided adhesive tape or applying an adhesive. The adhesive layer 14 of the sheet 13A
And the adhesive layer 14 of the sheet 13B are provided at positions facing each other.

Accordingly, when the wiring sheet 12 is sandwiched between the sheets 13A and 13B, the sheets are bonded by the adhesive layer.

As shown in FIG. 5, the connection cable 11
Are reversed, the reversing units 13c, 13c include:
The adhesive layer does not exist. Therefore, the reversing unit 13
c, 13c, the wiring sheet 12 and each sheet 13A
And 13B are not bound to each other by the adhesive layer. Therefore, in the reversing portions 13c, 13c, the sheets 12 and 13A, 13B are bent independently of each other. Therefore, in the connection cable 11 bent as shown in FIG. 5, the deformation of the reversing portions 13c, 13c is flexible.

When the fixed-side substrate 1 and the movable-side substrate 2 are connected using the connection cable 11, the movement of the movable-side substrate 2 prevents a large bending stress from being accumulated in the inversion portions 13c, 13c of the connection cable 11. And the movement of the movable substrate 2 is smooth.

In the connection cable shown in FIG. 1 and FIG. 2, even when the wiring sheet and the shield sheet are used in an overlapping manner, it is preferable not to provide an adhesive for bonding the sheets at the reversing portions 10b and 10d. .

[0042]

According to the present invention described in detail above, the connection cable can allow the movable part to move in three-dimensional directions. Further, when a plurality of sheets are stacked, the restraint between the sheets at the bending deformation section is eliminated, and the deformation at the reversing section can be made flexible.

[Brief description of the drawings]

FIG. 1 is an exemplary perspective view showing the inside of an electronic device using a connection device according to a first embodiment of the present invention;

FIG. 2 is a developed plan view of a connection cable used in FIG. 1,

FIG. 3 is a perspective view showing a process of bending a connection cable;

FIG. 4 is an exploded perspective view of a connection cable used in the connection device according to the second embodiment;

FIG. 5 is a side view showing a state where the connection cable shown in FIG. 4 is deformed;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed-side board 2 Movable-side board 3 Elastic support member 10, 11 Connection cable 10A, 10B Connection part 10a 1st bending part 10b 1st inversion part 10c 2nd bending part 10d 2nd inversion part 12 Wiring sheet 12A , 12B Connection part 13 Shield sheet 13A, 13B Sheet 13a Connection part 13b Connection part 14 Adhesive layer

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H01B 7/08 H01R 23/68 303C F term (reference) 5E023 AA04 AA16 BB06 BB22 BB23 CC02 HH01 5E077 BB05 BB31 BB32 CC02 HH07 JJ11 5G309 FA05 LA24 LA27 5G311 CA01 CB01 CC04 CD03 CE04 CF02 CF05 CF06 5G375 AA03 CA02 CA19 DB04 DB16 EA17

Claims (6)

[Claims] 1. A connection device in which at least one of two movable portions is connected by a flexible connection cable, wherein connection portions are provided at both ends of the connection cable, and the connection portion and the connection portion are provided. A first reversing portion that reverses around a first virtual center line L1 and a second reversing portion that reverses around a second virtual center line L2 are provided on the connection cable, and The first virtual center line L1 and the second virtual center line L2 are both substantially parallel to the surface of the connection cable, and are oriented in the direction in which the first virtual center line L1 and the second virtual center line L2 intersect. A connection device, wherein a first inversion portion and a second inversion portion are formed. 2. A lower portion of the connection cable between one connection portion and a first reverse portion, an intermediate portion between the first reverse portion and the second reverse portion, and a second reverse portion. When the space between the first inversion portion and the second connection portion is located above the lower portion, and the upper portion is located above the intermediate portion when an upper portion is provided between the first inversion portion and the second connection portion. 2. An inverting portion is formed.
The connecting device as described. 3. A shape obtained by developing the connection cable in a planar shape, wherein a first bent portion which is bent at substantially 90 degrees at the lower portion is formed, and the intermediate portion extends in a direction orthogonal to a bending direction of the first bent portion. A second bend is formed that bends at approximately 90 degrees,
3. The connection device according to claim 2, wherein both connection portions are oriented in opposite directions to each other. 4. The first bending portion and the second bending portion,
4. The connection device according to claim 2, wherein the shape of the edge of the connection cable is curved. 5. A connection device in which at least one of the two movable portions is connected by a connection cable having flexibility, wherein the connection cable has a plurality of sheets bonded to each other with an adhesive layer on a sheet surface. The connection device, wherein the connection cable has an inverted portion inverted between the connection portions, and the adhesive layer is provided in a region other than the inverted portion. 6. The connection cable has a wiring sheet having connection portions connected to the respective portions at both ends, wiring leads for conducting between the two connection portions, and a shield layer covering the wiring leads. The connection device according to claim 5, further comprising: a shield sheet overlapped with the wiring sheet.