JP2008300085A - Cable, mobile terminal mounting cable concerned, and manufacturing method of cable concerned - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable with a connector capable of conductively connecting terminals of the connector and a plurality of discrete wires after precisely positioning them in a simple method, with the use of the plurality of fine discrete wires. <P>SOLUTION: Wire rods 50 are preliminarily coupled and fixed using adhesive films 52 by a jig by conforming intervals of the discrete wires 51 to pitches of terminals 32 of the connector 30. Further, positions of positioning end parts 52a of the adhesive film 52 for positioning a length direction of the discrete wires 51 and the connector are also preliminarily set by the jig. The discrete wires 51 coupled and fixed using the adhesive films 52 are retained in a crossing-direction positioning groove 31b of the connector 30, and positioning end parts 52a of the adhesive films 52 are abutted to the length-direction positioning end parts 31a to be retained in position, at which state, core wires 51a of the discrete wires 51 and terminals 32 of the connector 30 are soldered to each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cable with a connector used for connecting an electrical signal between upper and lower housings in a foldable portable terminal or the like, a portable terminal equipped with the cable, and a method for manufacturing the cable.

(Background Technology 1)
As an interface between upper and lower casings of a mobile phone including a plurality of casings such as a revolver type and a folding type, a thin coaxial cable harness in which about 40 are bundled is often used. However, the thin coaxial cable and its connector are expensive, and have such demerits as 0.26 to 0.31Φ, which is thick and hard, heavy, and has a large electrical resistance due to a thin core wire.

(Background Technology 2)
There is a twisted electric wire with a pressure connector (for example, refer to Patent Document 1). In the method of connecting the crimping connector and the twisted wire in the twisted wire with the crimping connector of Patent Document 1, the distance d between the twisted wires 11 is adjusted with the jig 13 so as to match the pitch P of the terminals of the crimping connector 15. The laminate film 12 is maintained. And the press-connecting connector 15 and the twisted electric wire 11 are press-contacted.
Patent Document 1 describes how to match the terminal pitch of the press-connecting connector 15 and the wire spacing of the twisted wires 11, but how to position the press-connecting connector 15 and the entire twisted wire 11 together before press-connecting them. There is no description of what to do.
JP-A-2002-247725 (pages 2 and 3, FIGS. 1 to 3)

  When a discrete line as in Background Art 2 (Patent Document 1) is applied instead of a fine coaxial line as a cable having a large number of interfaces between the upper and lower housings of the mobile phone of Background Art 1, the entire connector and the entire discrete line are applied. There is no description of how to position and connect.

  The present invention solves the conventional problems and includes a connector with a connector that can use a plurality of very fine discrete wires to accurately position a connector terminal and a plurality of discrete wires in a simple manner and then conduct conductive connection. It is an object to provide a cable, a portable terminal equipped with the cable, and a method for manufacturing the cable.

  In order to achieve the above object, the cable of the present invention is a cable having a plurality of wires and a connector to which the wires are connected, and the connector has a predetermined interval in an orthogonal direction perpendicular to the longitudinal direction of the wire. A plurality of terminals arranged in the longitudinal direction at a predetermined position in the longitudinal direction from the terminals, and the plurality of wires are arranged in the longitudinal direction by a rectangular adhesive tape. Are connected and fixed along the orthogonal direction with a predetermined width, and are held in a state where the end portion of the adhesive tape along the orthogonal direction and the longitudinal alignment end portion of the connector are substantially abutted, and the wire and the The terminal is conductively connected.

  According to the present invention, in a cable with a connector using a large number of thin and flexible discrete wires, the discrete wires and the connectors can be accurately positioned and connected by a simple method.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a structural diagram of a mobile terminal according to an embodiment of the present invention, and shows “A: front view”, “B: cable connection”, and “C: side view”. The portable terminal 100 has a foldable structure, and an upper housing 1 and a lower housing 2 are engaged with a hinge 3 so as to be freely rotatable.

  As shown in “A: Front view”, an audio receiver 4, a display unit 5, and the like are arranged in the upper housing 1. A camera 6 and the like are disposed on the back side of the upper housing 1. An operation key 7 and the like are disposed on the lower housing 2.

  As shown in “B: harness connection”, the upper substrate 8 is disposed inside the upper housing 1, and the main substrate 9 is disposed inside the lower housing 2. The upper substrate 8 and the main substrate 9 are electrically connected by a cable 20. The cable 20 is a cable with a connector, and includes a connector 30, a connector 40, a wire 50, and the like.

  The cable 20 is wired through the inside of the hinge 3. The upper substrate 8 and the main substrate 9 are mounted with connectors (not shown) that are detachably fitted to the connector 30 and the connector 40 of the cable 20, but will be omitted in the following description.

  As shown in “C: side view”, a main board 9 is arranged inside the lower housing 2, and a control unit 10 and the like are mounted on the main board 9. The upper substrate 8 and the main substrate 9 transmit and receive power, acoustic signals, display data, camera data, and the like via the cable 20, and the number of the substrates is as large as about 40.

Therefore, the wire 50 of the cable 20 is required to be light, thin, small, light and rich in flexibility. Hereinafter, the structure of the cable 20 will be described in detail.
FIG. 2 is a diagram for explaining the pre-processing of the wire rod before soldering the wire rod to the connector terminal in the cable with connector according to the embodiment of the present invention. The wire 50 is a collection of about 40 discrete wires. In the figure, the number is reduced. Only the end portion of the cable 20 connected to one connector 30 will be described.

  FIG. 2A shows the pre-process 1, in which the left side is a plan view and the right side is a side view taken along the line XX. The pre-process 1 is a process of fixing the plurality of discrete wires 51 with an adhesive film so as to match the terminal pitch of the connector. The pre-process jig 70 is formed with U-grooves 71 that match the pitch of the terminals of the connector 30.

  First, as shown in the right side of FIG. 2 (A), a plurality of discrete wires 51 are placed in the U-groove 71, and the adhesive film is applied to the discrete wires 51 in a state where the distance from the longitudinal ends of the discrete wires 51 is matched. 52 is affixed, and the plurality of discrete wires 51 and the adhesive film 52 are connected and fixed.

  FIG. 2 (B) is a front view 2 and is a side view taken along the line YY in FIG. 2 (A). Laser irradiation is performed with high power from above and below with respect to a position that serves as a reference for alignment in the longitudinal direction when the wire 50 is soldered to the connector 30 described later (FIGS. 3 and 4). Thereby, the coating 51b of the adhesive film 52 and the discrete wire 51 is cut.

FIG. 2C is the pre-process 3. Laser irradiation is performed from above with a small electric power on the position of the excess part on the back side of the adhesive film 52, and the adhesive film 52 is cut.
FIG. 2D shows the pre-process 4. After the laser irradiation, excess portions of the adhesive film 52 and the coating 51b are peeled off.

  FIG. 2E shows the completed state of the pre-processing. The core wires 51a of the plurality of discrete wires 51 are exposed, and this portion is soldered to the terminals of the connector 30 in a subsequent process (FIGS. 3 and 4). Yes. Further, an alignment end portion 52a and a rear end 52b are formed which serve as a reference for alignment of the terminals of the connector 30 and the wire 50 in the longitudinal direction when soldering. The intervals between the plurality of discrete wires 51 are connected and fixed in a state that matches the pitch of the terminals of the connector 30.

  FIG. 2 (F) shows another embodiment of a pre-processed finished product. In this state, the coating 51b is pre-processed so as to protrude from the alignment end portion 52a to the tip side.

  An example of dimensions of each part will be described. The discrete wire 51 is extremely thin and has an outer shape of 0.18 mmΦ. The core wire 51a is a stranded wire composed of seven single wires of 30 μm. The coating 51b has a thickness of about 50 μm. For this reason, the discrete wire 51 is rich in flexibility. The adhesive film 52 is a Teflon (R) material having a thickness of 60 to 80 μm and relatively hard.

In addition, after sticking the adhesive film 52 to the discrete wire 51, it cut with the laser, and created the alignment end part 52a and the rear end 52b, From the beginning, between the alignment end part 52a and the rear end 52b An adhesive film 52 having a width may be prepared, and positioned with the discrete wire 51 and pasted.
Further, although the adhesive film 52 is used, it may be a fixing material in which the alignment end portion 52a and the rear end 52b appear properly.

Next, the soldering process (post process) of the wire 50 and the connector 30 after the pre-processing will be described.
FIG. 3 is an external perspective view of the cable with connector according to the embodiment of the present invention. The connection part of the connector 30 and the wire 50 is illustrated in the cable 20. The connection part of the other connector 40 and the wire 50 is equivalent, and description is abbreviate | omitted.

  The connector 30 has a plurality of terminals 32 mounted on a housing 31 at a predetermined pitch. A portion of the housing 31 has a longitudinal alignment end 31a. Further, there is an orthogonal direction alignment groove 31b that matches the arrangement of the terminals 32. The width of the orthogonal alignment groove 31b is a width in which the core wire 51a of the discrete wire 51 is inserted. Further, a recess 31c is formed in a part of the housing 31, and a covering 51b portion of the discrete wire 51 is placed here.

  First, the wire 50 (FIG. 2E) that has been pre-processed and connected is arranged in accordance with the orthogonal direction alignment groove 31b and the recess 31c of the connector 30. Then, the alignment end portion 52 a of the adhesive film 52 of the wire 50 is disposed so as to abut on the longitudinal alignment end portion 31 a of the connector 30. Thereby, the wire 50 and the connector 30 are arrange | positioned in the state which aligned correctly in the orthogonal direction and the longitudinal direction.

  In addition, although the width of the orthogonal alignment groove 31b is set to be a width in which the core wire 51a of the discrete wire 51 is inserted, the width may be set to be a little larger than that of the covering 51b. Then, the connected wire 50 after the pre-processing of FIG. 2F is placed in the orthogonal direction alignment groove 31b. Thereby, the position alignment of the orthogonal | vertical direction can be reliably performed by the coating | coated 51b part whose intensity | strength is stronger than the core wire 51a.

  The reason why the longitudinal alignment is performed using the alignment end 52a of the adhesive film 52 will be described below. As for a large number of signal lines between casings that are freely engaged like a foldable portable terminal, the discrete line 51 is preferably thin and rich in flexibility. However, when the discrete wire 51 and the connector 30 are aligned, the discrete wire 51 itself is easily deformed by an external force. Therefore, the end of the covering 51b of the discrete wire 51 and the end of the core wire 51a are placed anywhere on the connector. It is difficult to align directly in the longitudinal direction.

  In contrast, the adhesive film 52 is a relatively hard Teflon (R) material and is connected in a wide shape in the orthogonal direction, so that the alignment end 52a of the adhesive film 52 and the connector 30 are connected to each other. Even if the alignment is performed by abutting the longitudinal alignment end portion 31a, the alignment in the longitudinal direction can be performed accurately without causing deformation. In this way, it is possible to accurately align the terminals of the ultra-small connector and the ultrafine wire 50 in the longitudinal direction.

  Further, only the end portion of the discrete wire 51 mounted in the connector in the longitudinal direction is connected and fixed by the adhesive film 52. Therefore, since the middle part in the longitudinal direction is in a free state, it can move with great flexibility as a wire between the freely engaged housings.

Next, the soldering process will be described.
FIG. 4 is a cross-sectional view of the connector-attached cable according to the embodiment of the present invention.
FIG. 4A is a diagram for explaining soldering after alignment, and illustrates the cable 20, the jig 80, and the heat bar 90. The cable 20 includes a connector 30 and a wire 50. The jig 80 is a jig for aligning the connector 30 and the wire 50 and further soldering. The heat bar 90 is a soldering device.

  First, the connector 30 is placed on the jig 80, and then the pre-processed wire 50 (FIG. 2E) is placed on the connector 30 as described with reference to FIG. At this time, the alignment end 52 a of the adhesive film 52 of the wire 50 is abutted against the longitudinal alignment end 31 a of the connector 30. Further, each discrete line 51 is arranged in alignment with the orthogonal direction alignment groove 31b.

  In this state, the rear end 52b of the adhesive film 52 is preprocessed to a size that fits exactly into the end face of the stopper 81 of the jig 80. Thereby, the wire 50 is prevented from moving in the longitudinal direction.

  The rear end 52b of the adhesive film 52 is prevented from moving to the left side of the figure in the longitudinal direction by the stopper 81 of the jig 80. Alternatively, the protrusion of the concave portion 31c of the connector 30 is elongated. The pressure-sensitive adhesive film 52 may be made higher between the direction alignment end portion 31a so that the adhesive film 52 enters between the protrusions of the longitudinal alignment end portion 31a and the recessed portion 31c.

  Moreover, the rear end 52b of the adhesive film 52 may be abutted against the stopper 81 of the jig 80 and the longitudinal alignment may be performed without providing the connector 30 with the longitudinal alignment end 31a.

  In this manner, with the connector 30 and the wire 50 aligned, the heat bar 90 is pressed downward to solder the core wire 51a and the terminal 32, and the soldering is completed. By this soldering, the wire 50 is also prevented from being pulled out from the connector 30 together with the electrical continuity joining.

  FIG. 4B is a view for explaining the attachment of the protective shell after soldering. The protective shell 33 is attached to the housing 31 so as to be pressed against the adhesive film 52. The friction surface 33a of the protective shell 33 is a surface pressed against the adhesive film 52, and is subjected to a friction increasing process so that the friction between the protective shell 33 and the adhesive film 52 increases. For example, small nails and rough surface processing are performed. This also prevents the wire 50 from being pulled out or loose from the connector 30.

  According to an embodiment of the present invention, in a cable with a connector using a large number of thin and flexible discrete wires, the connector can be electrically connected after the discrete wires and the connector are accurately positioned by a simple method. It can be a cable.

  Note that the mobile terminal of the embodiment can be applied to a mobile phone, a PDA, a camera, a notebook computer, and the like. Moreover, the cable of an Example can be applied for the connection of the movable part of these portable terminals.

1 is a structural diagram of a mobile terminal according to an embodiment of the present invention. The figure explaining the pre-processing of the wire before soldering a wire to the terminal of a connector in the cable with a connector which concerns on the Example of this invention. The external appearance perspective view of the cable with a connector which concerns on the Example of this invention. Sectional drawing of the cable with a connector which concerns on the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper housing | casing 2 Lower housing | casing 3 Hinge 4 Audio | voice receiver 5 Display part 6 Camera 7 Operation key 8 Upper board 9 Main board 10 Control part 20 Cable 30 Connector 31 Housing 31a Longitudinal alignment edge 31b Orthogonal alignment groove 31c Recess 32 Terminal 33 Protective shell 33a Friction surface 40 Connector 50 Wire material 51 Discrete wire 51a Core wire 51b Cover 52 Adhesive film 52a Positioning end 52b Rear end 70 Pre-processing jig 71 U groove 80 Jig 81 Stopper 90 Heat bar 100 Mobile terminal

Claims (5)

A cable having a plurality of wires and a connector to which the wires are connected,
The connector is
A plurality of terminals arranged at predetermined intervals in an orthogonal direction orthogonal to the longitudinal direction of the wire;
A longitudinal alignment end along the orthogonal direction at a predetermined position in the longitudinal direction from the terminal;
The plurality of wires are connected and fixed along the orthogonal direction with a predetermined width in the longitudinal direction by a rectangular adhesive tape,
A cable characterized in that an end portion of the adhesive tape along the orthogonal direction and a longitudinal alignment end portion of the connector are held substantially in contact with each other, and the wire rod and the terminal are conductively joined. A cable having a plurality of wires and a connector to which the wires are connected,
The connector is
A plurality of terminals arranged at predetermined intervals in an orthogonal direction orthogonal to the longitudinal direction of the wire;
A longitudinal alignment end along the orthogonal direction at a predetermined position in the longitudinal direction from the terminal;
An orthogonal direction alignment groove that matches the orthogonal arrangement of the plurality of terminals,
The plurality of wire rods are connected and fixed at the same interval as the predetermined interval of the terminals along the orthogonal direction with a predetermined width in the longitudinal direction by a rectangular adhesive tape,
The plurality of connected and fixed wires are held in the orthogonal direction alignment groove portion of the connector, and are held in a state where the end portion of the adhesive tape along the orthogonal direction and the longitudinal alignment end portion of the connector substantially abut against each other. The cable is characterized in that the wire and the terminal are conductively joined. Furthermore,
A protective shell that is arranged to cover the wire and the adhesive tape and is attached to the connector;
The cable according to claim 1, wherein the protective shell is a surface in which a surface in contact with the adhesive tape is subjected to a friction increasing process. A portable terminal in which a first housing and a second housing are freely engaged,
A portable terminal using the cable of claim 1 or 2 for connection of an electrical signal between the first casing and the second casing. A method of manufacturing a cable having a plurality of wires and a connector to which the wires are connected,
In a state where the tips of the plurality of wires are aligned and parallel to the longitudinal direction of the wires, a portion at a predetermined position in the longitudinal direction from the tips is placed in the longitudinal direction with a predetermined width in the longitudinal direction using a rectangular adhesive tape. Connecting and fixing along an orthogonal direction perpendicular to each other, and removing the coating of a predetermined length of the tip portion of the wire rod to give a core wire; and
Holding the connector on a jig;
The connected and fixed wire is placed on a connector held by the jig, and an end portion of the adhesive tape along the orthogonal direction is abutted against a longitudinal alignment end portion of the jig along the orthogonal direction. A process of aligning and
A method of producing a cable, comprising: a step of conducting and joining a core wire of the wire to a terminal of the connector.

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