US20120325526A1 - Bundled flexible flat circuit cable - Google Patents
Bundled flexible flat circuit cable Download PDFInfo
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- US20120325526A1 US20120325526A1 US13/602,627 US201213602627A US2012325526A1 US 20120325526 A1 US20120325526 A1 US 20120325526A1 US 201213602627 A US201213602627 A US 201213602627A US 2012325526 A1 US2012325526 A1 US 2012325526A1
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- Prior art keywords
- cluster
- bundled
- section
- flat circuit
- circuit cable
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/08—Flat or ribbon cables
- H01B7/0892—Flat or ribbon cables incorporated in a cable of non-flat configuration
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/148—Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/05—Flexible printed circuits [FPCs]
- H05K2201/051—Rolled
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/05—Flexible printed circuits [FPCs]
- H05K2201/055—Folded back on itself
Definitions
- the present invention relates to a single transmission flat cable, and in particular to a bundled flexible flat circuit cable with a stack structure.
- a conventional flat cable comprises a plurality of conductors covered with insulation arranged to joint each other in a side-by-side fashion to form a cable having a flat structure.
- the flat cable is commonly used for transmission of signal in a variety of electrical appliances, electronic facility, computer facility, and communication facility.
- the flexible circuit-board flat cables that are commonly used currently are constructed in different configurations that are either a single-sided board, a double-sided board, or a multiple-layered board, in order to meet the needs of applications that require different numbers of conductors for signal transmission.
- Adopting a flat cable that has a flat structure to serve as a signal transmission line constitutes no severe problem in practical applications where the flat cable needs to extend through an elongate space.
- a hinge structure that has a bore.
- a cover or a screen is coupled to a body of the electronic device with a hinge structure.
- the state-of-the-art techniques use a miniaturized flat cable or bundled extra thin leads to serve as a signal transmission line.
- the present inventor provided various flexible flat circuit cables that have a bundled structure and a cluster section.
- the cluster section is composed of a plurality of cluster strips formed by slitting a flexible substrate in an extension direction.
- a flexible flat circuit cable having a bundled structure and a cluster section meets most of the needs discussed above.
- an objective of the present invention is to provide a bundled flexible flat circuit cable having a stack structure, whereby the stack structure allows the flat cable to reduce a width dimension of an end of the flat cable so that the end of the flexible flat circuit cable can easily extend through a bore defined in a hinge.
- Another objective of the present invention is to provide a bundled flexible flat circuit cable that exhibits excellent electromagnetic shielding characteristics, which when combined with the features of stacking and bundling of the flat cable of the present invention, allows for the formation of an electromagnetic shielding layer on a flexible substrate of the flat cable and may also allow for forming a bundled structure with electromagnetic shielding material.
- the solution adopted in the present invention to overcome the problems of the conventional techniques comprises a flexible substrate that forms at least one cluster section.
- the cluster section is composed of plural cluster strips that are formed by slitting the flexible substrate along an extension direction of the flexible substrate.
- the cluster section has an end forming at least one first connection section and an opposite end forming at least one second connection section.
- Both the first and second connection sections or one of the first and second connection sections comprises a stack structure, which is formed by folding two opposite side stacking zones or one of the two opposite side stacking zones of the connection section along a respective fold line to have the side stacking zone stacked on at least a portion of a central zone of the connection section that is located between the two opposite side stacking zones.
- the flexible substrate can be of a single-sided or double-sided structure and may additionally comprise an electromagnetic shielding layer.
- a bundling structure is provided to bundle the cluster section at a predetermined location to form a bundled structure.
- the bundling structure can be made of a shielding material, an insulation material, or a combination of shielding material and insulation material.
- a stacked arrangement is selectively formed so that the configuration of a signal transmission flat cable can be made to reduce the width dimension of an end of the flexible flat circuit cable.
- the sized reduced end of the flexible flat circuit cable can be easily extended through a small diameter of a bore defined in a hinge when the flexible flat circuit cable is being mounted to the hinge structure.
- the bundling structure that bundles the cluster section of the flexible flat circuit cable together provides a function to restrict flexing of each cluster strip of the cluster section of the flexible substrate and also offers electromagnetic shielding to the cluster section.
- FIG. 1 is a perspective view of a bundled flexible flat circuit cable in accordance with the present invention in an expanded form
- FIG. 2 is a cross-sectional view taken along line 2 - 2 of FIG. 1 ;
- FIG. 3 is a cross-sectional view showing a flexible substrate arranged as a double-sided circuit substrate in accordance with the present invention
- FIG. 4 is a perspective view showing the bundled flexible flat circuit cable of the present invention with terminal connection sections thereof in a stacked condition;
- FIG. 5 is a cross-sectional view taken along line 5 - 5 of FIG. 4 ;
- FIG. 6 is a perspective view showing an embodiment of the bundled flexible flat circuit cable of the present invention where both a first connection section and a second connection section are each provided with a connection socket;
- FIG. 7 is a perspective view showing an embodiment of the present invention where a connection section is connected respectively through cluster strips of two separate cluster sections to two opposite connection sections;
- FIG. 8 is a cross-sectional view showing a bundling structure wrapping around cluster strips of a cluster section of a flexible substrate in accordance with the present invention
- FIG. 9 is a perspective view showing an application of the present invention in a mobile phone that has a hinge structure
- FIG. 10 is a cross-sectional view showing an outer insulation layer wrapping around an outer surface of an electromagnetic shielding layer of the bundling structure shown in FIG. 8 ;
- FIG. 11 is a cross-sectional view showing a cluster section of a flexible substrate of the present invention first wrapped by an inner insulation layer, an electromagnetic shielding layer wrapping around an outer surface of the inner insulation layer, and an outer insulation layer further wrapping around an outer surface of the electromagnetic shielding layer;
- FIG. 12 is a perspective view showing a bundled flexible flat circuit cable in accordance with the present invention where a helical bundling structure wraps around a predetermine location of a cluster section of the bundled flexible flat circuit cable.
- the bundled flexible flat circuit cable constructed in accordance with the present invention comprises a flexible substrate 11 , which extends a predetermined length in an extension direction I.
- the flexible substrate 11 has a first surface 11 a and an opposite second surface 11 b .
- a first conductive layer 12 and a first insulation layer 13 are sequentially formed on the first surface 11 a of the flexible substrate 11 .
- an electromagnetic shielding layer 14 is further formed on the first insulation layer 13 .
- the electromagnetic shielding layer 14 may selectively and locally covers a predetermined area of an external surface of the first insulation layer 13 to provide electromagnetic shielding for protecting electrical signals.
- the flexible circuit substrate shown in FIG. 2 has a structure of single-sided circuit substrate.
- the present invention is equally applicable to a double-sided circuit substrate.
- a second conductive layer 15 and a second insulation layer 16 are sequentially formed on the second surface 11 b of the flexible substrate 11 .
- a signal jumper structure may be additionally provided.
- a through hole 17 is defined through both the first surface 11 a and the second surface 11 b of the flexible substrate 11 at a predetermined location and a conductive substance 18 is formed on an inside surface of the through hole 17 to allow for selective signal communication between the first conductive layer 12 and the second conductive layer 15 of the first surface 11 a and the second surface 11 b of the flexible substrate 11 .
- the structure of double-sided circuit substrate can be alternatively realized by bonding two single-sided circuit substrates in a back-to-back manner.
- the flexible substrate 11 is divided in the extension direction I into a first connection section 2 , a second connection section 3 , and a cluster section 4 between the first and second connection sections 2 , 3 .
- the first connection section 2 is located at an end of the cluster section 4
- the second connection section 3 is located at an opposite end of the flexible substrate 11 that is opposite to the first connection section 2 .
- the cluster section 4 comprises a plurality of cluster strips 41 that is formed by slitting the flexible substrate 11 in the extension direction I. All or some of the cluster strips 41 is provided with a signal line to serve as an electrical signal transmission path between the first connection section 2 and the second connection section 3 .
- the cluster section 4 may selectively form a plurality of tear stop holes 214 at suitable locations of terminals of all or some cluster strips 41 (for example, in the first connection section 2 and the second connection section 3 ) in order to protect the cluster strips 41 from damage caused by undesired tearing along the slitting during the assembling or use of the flexible substrate 11 .
- the first connection section 2 comprises a stack structure 20 .
- the stack structure 20 divides the first connection section 2 into a central zone 21 and side stacking zones 22 , 23 located on opposite sides of the central zone 21 .
- the side stacking zones 22 , 23 of the two sides or one of the side stacking zones 22 , 23 of one side of the central zone 21 is allowed to fold along a physical or imagination fold line 212 , 213 to fold in a direction toward the central zone 21 so as to have the side stacking zones 22 , 23 stacked under the central zone 21 or on a portion of the central zone 21 .
- the second connection section 3 may also be provided with a similar stack structure to allow two side stacking zones 32 , 33 that are located on opposite sides of a central zone 31 of the second connection section 3 to be stacked under the central zone 31 or on a portion of the central zone 31 . After the stacking operation, a structure shown in FIG. 4 is formed.
- the first connection section 2 and the second connection section 3 may be provided with different types of connection socket or terminal plug at predetermined locations thereof.
- a connection socket 211 is set on the central zone 21 of the first connection section 2
- the side stacking zone 32 of the second connection section 3 forms a terminal plug 321 at a side edge thereof.
- the central zone 21 of the first connection section 2 is mounted with a connection socket 211 and the side stacking zone 31 of the second connection section 3 is also provided with a connection socket 311 .
- connection sections and the cluster section of the flexible substrate can be arranged in a one-to-one fashion, or alternatively a one-to-plurality fashion can be adopted.
- FIG. 1 an arrangement that a connection section is connected by a single cluster section to an opposite connection section is provided.
- FIG. 7 a different arrangement that a second connection section 3 is connected by cluster strips 41 of a cluster section 4 to a first connection section 2 and is also connected by cluster strips 41 a of an additional cluster section 4 a to an additional first connection section 2 a is provided.
- Practical application may need different variations to meet different requirements.
- At least one bundling structure 5 is provided to loop around or bundle the cluster section 4 of the flexible substrate 11 at a predetermined location (see FIG. 4 ) so as to bundle the cluster strips 41 of the cluster section 4 together to form a bundled structure.
- FIG. 8 shows a cross-sectional view taken along line 8 - 8 of FIG. 4 .
- the bundling structure 5 comprises an electromagnetic shielding layer 51 .
- the bundling structure 5 comprises a structure that is made of an electromagnetic shielding substance looping around the predetermined location of the cluster section 4 , so as to loop or bundle the cluster strips 41 of the cluster section 4 together to form a bundled structure and also to provide electromagnetic shielding to the cluster section 4 .
- the bundling structure 5 can be alternatively made of an insulation material (such as a water-proof plastic band) or a composite combination of electromagnetic shielding substance and insulation material can be used to form the bundling structure.
- FIG. 9 illustrates an example application of the present invention in a mobile phone that has a hinge structure.
- the bundled flexible flat circuit cable 100 is set through a hinge structure 6 with the cluster strips 41 of the cluster section 4 of the flexible substrate 11 and the first connection section 2 and the second connection section 3 are respectively set on opposite sides of the hinge structure 6 .
- the electromagnetic shielding effect provided by the electromagnetic shielding layer 51 of the bundling structure 5 electromagnetic interference occurring in the electrical signals transmitted through a transmission path defined by the cluster strips 41 of the cluster section 4 can be effectively eliminated.
- an outer surface of the electromagnetic shielding layer 51 may be further surrounded by an outer insulation layer 52 (see FIG. 10 ), or alternatively, the cluster section 4 of the flexible substrate 11 is wrapped around by an inner insulation layer 53 , an electromagnetic shielding layer 51 is then wrapped around an outer surface of the inner insulation layer 53 , and finally an outer insulation layer 54 is further wrapped around an outer surface of the electromagnetic shielding layer 51 (see FIG. 11 ).
- the bundling structure 5 used in the previous embodiments is made in the form of a thin sheet, which is wrapped in a wrapping direction II around the predetermined location of the cluster section.
- a helical wrapping structure may be employed to form the bundling structure.
- a slender elongate band made of an electromagnetic shielding material is helically wrapped in an inclination direction III around the cluster strips 41 of the cluster section 4 to form a helical bundling structure 5 a .
- the elongate band can be made of an electromagnetic shielding material including a piece of electrically conductive cloth, silver foil, aluminum foil, copper foil, and other metal foils that exhibit electromagnetic shielding characteristics.
Abstract
A bundled flexible flat circuit cable includes a flexible substrate that forms at least one cluster section having an end forming at least one first connection section and an opposite end forming at least one second connection section. Both the first and second connection sections or one of the first and second connection sections form a stack structure. The flexible substrate can be of a structure of single-sided or double-sided substrate and may additionally include an electromagnetic shielding layer. A bundling structure is provided to bundle the cluster section at a predetermined location to form a bundled structure. The bundling structure can be made of a shielding material, an insulation material, or a combination of shielding material and insulation material.
Description
- This application is a Divisional patent application of co-pending application Ser. No. 12/729,677, filed on 23 Mar. 2010, now pending. The entire disclosure of the prior application, Ser. No. 12/729,677, from which an oath or declaration is supplied, is considered a part of the disclosure of the accompanying Divisional application and is hereby incorporated by reference.
- The present invention relates to a single transmission flat cable, and in particular to a bundled flexible flat circuit cable with a stack structure.
- A conventional flat cable comprises a plurality of conductors covered with insulation arranged to joint each other in a side-by-side fashion to form a cable having a flat structure. The flat cable is commonly used for transmission of signal in a variety of electrical appliances, electronic facility, computer facility, and communication facility.
- Recently, flexible circuit board technology has also been applied to construct flat cables. The flexible circuit-board flat cables that are commonly used currently are constructed in different configurations that are either a single-sided board, a double-sided board, or a multiple-layered board, in order to meet the needs of applications that require different numbers of conductors for signal transmission.
- Adopting a flat cable that has a flat structure to serve as a signal transmission line constitutes no severe problem in practical applications where the flat cable needs to extend through an elongate space. However, lots of existing electronic or communication devices use a hinge structure that has a bore. For example, in the structure designs of various consumer electronic devices, such as notebook computers, liquid crystal displays, digital cameras, mobile phones, touch panels, or other electronic devices, a cover or a screen is coupled to a body of the electronic device with a hinge structure. To allow a signal to be transmitted from the body of the electronic device to the cover or the screen, the state-of-the-art techniques use a miniaturized flat cable or bundled extra thin leads to serve as a signal transmission line. In the applications mentioned previously, adopting the conventional flat cable constitutes problems, for example, rotation of the hinge being negatively affected by the existence of the conventional flat cable, insufficient flexibility of the conductors or leads, poor durability against flexing of the conductors or leads. Due to these problems, the present inventor provided various flexible flat circuit cables that have a bundled structure and a cluster section. The cluster section is composed of a plurality of cluster strips formed by slitting a flexible substrate in an extension direction.
- Using a flexible flat circuit cable having a bundled structure and a cluster section meets most of the needs discussed above. However, certain problems exist. For example, in an attempt to set a flexible flat circuit cable in a hinge of an electronic device, extending a connection socket or a terminal plug provided at an end of the flat cable through the small diameter of the bore of the hinge becomes a problem that is hard to handle. Further, even though the connection socket or the terminal plug can readily extend through the small diameter of the hinge bore, the cluster of strips is susceptible to arbitrary distortion and external electromagnetic interference.
- In view of the drawbacks of the known techniques, an objective of the present invention is to provide a bundled flexible flat circuit cable having a stack structure, whereby the stack structure allows the flat cable to reduce a width dimension of an end of the flat cable so that the end of the flexible flat circuit cable can easily extend through a bore defined in a hinge.
- Another objective of the present invention is to provide a bundled flexible flat circuit cable that exhibits excellent electromagnetic shielding characteristics, which when combined with the features of stacking and bundling of the flat cable of the present invention, allows for the formation of an electromagnetic shielding layer on a flexible substrate of the flat cable and may also allow for forming a bundled structure with electromagnetic shielding material.
- The solution adopted in the present invention to overcome the problems of the conventional techniques comprises a flexible substrate that forms at least one cluster section. The cluster section is composed of plural cluster strips that are formed by slitting the flexible substrate along an extension direction of the flexible substrate. The cluster section has an end forming at least one first connection section and an opposite end forming at least one second connection section. Both the first and second connection sections or one of the first and second connection sections comprises a stack structure, which is formed by folding two opposite side stacking zones or one of the two opposite side stacking zones of the connection section along a respective fold line to have the side stacking zone stacked on at least a portion of a central zone of the connection section that is located between the two opposite side stacking zones.
- In an embodiment of the present invention, the flexible substrate can be of a single-sided or double-sided structure and may additionally comprise an electromagnetic shielding layer. A bundling structure is provided to bundle the cluster section at a predetermined location to form a bundled structure. The bundling structure can be made of a shielding material, an insulation material, or a combination of shielding material and insulation material.
- According to the present invention, a stacked arrangement is selectively formed so that the configuration of a signal transmission flat cable can be made to reduce the width dimension of an end of the flexible flat circuit cable. Thus, the sized reduced end of the flexible flat circuit cable can be easily extended through a small diameter of a bore defined in a hinge when the flexible flat circuit cable is being mounted to the hinge structure. The bundling structure that bundles the cluster section of the flexible flat circuit cable together provides a function to restrict flexing of each cluster strip of the cluster section of the flexible substrate and also offers electromagnetic shielding to the cluster section.
- The present invention will be apparent to those skilled in the art by reading the following description of preferred embodiments of the present invention, with reference to the attached drawings, in which:
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FIG. 1 is a perspective view of a bundled flexible flat circuit cable in accordance with the present invention in an expanded form; -
FIG. 2 is a cross-sectional view taken along line 2-2 ofFIG. 1 ; -
FIG. 3 is a cross-sectional view showing a flexible substrate arranged as a double-sided circuit substrate in accordance with the present invention; -
FIG. 4 is a perspective view showing the bundled flexible flat circuit cable of the present invention with terminal connection sections thereof in a stacked condition; -
FIG. 5 is a cross-sectional view taken along line 5-5 ofFIG. 4 ; -
FIG. 6 is a perspective view showing an embodiment of the bundled flexible flat circuit cable of the present invention where both a first connection section and a second connection section are each provided with a connection socket; -
FIG. 7 is a perspective view showing an embodiment of the present invention where a connection section is connected respectively through cluster strips of two separate cluster sections to two opposite connection sections; -
FIG. 8 is a cross-sectional view showing a bundling structure wrapping around cluster strips of a cluster section of a flexible substrate in accordance with the present invention; -
FIG. 9 is a perspective view showing an application of the present invention in a mobile phone that has a hinge structure; -
FIG. 10 is a cross-sectional view showing an outer insulation layer wrapping around an outer surface of an electromagnetic shielding layer of the bundling structure shown inFIG. 8 ; and -
FIG. 11 is a cross-sectional view showing a cluster section of a flexible substrate of the present invention first wrapped by an inner insulation layer, an electromagnetic shielding layer wrapping around an outer surface of the inner insulation layer, and an outer insulation layer further wrapping around an outer surface of the electromagnetic shielding layer; and -
FIG. 12 is a perspective view showing a bundled flexible flat circuit cable in accordance with the present invention where a helical bundling structure wraps around a predetermine location of a cluster section of the bundled flexible flat circuit cable. - With reference to the drawings and in particular to
FIG. 1 , which shows a perspective view of a bundled flexible flat circuit cable in accordance with the present invention in an expanded form, andFIG. 2 , which shows a cross-sectional view taken along line 2-2 ofFIG. 1 , the bundled flexible flat circuit cable constructed in accordance with the present invention, generally designated at 100, comprises aflexible substrate 11, which extends a predetermined length in an extension direction I. Theflexible substrate 11 has afirst surface 11 a and an oppositesecond surface 11 b. A firstconductive layer 12 and afirst insulation layer 13 are sequentially formed on thefirst surface 11 a of theflexible substrate 11. In a preferred embodiment of the present invention, anelectromagnetic shielding layer 14 is further formed on thefirst insulation layer 13. Theelectromagnetic shielding layer 14 may selectively and locally covers a predetermined area of an external surface of thefirst insulation layer 13 to provide electromagnetic shielding for protecting electrical signals. - The flexible circuit substrate shown in
FIG. 2 has a structure of single-sided circuit substrate. However, the present invention is equally applicable to a double-sided circuit substrate. In a structure of double-sided circuit substrate (seeFIG. 3 ), a secondconductive layer 15 and asecond insulation layer 16 are sequentially formed on thesecond surface 11 b of theflexible substrate 11. Further, in the structure of double-sided circuit substrate, a signal jumper structure may be additionally provided. For example, athrough hole 17 is defined through both thefirst surface 11 a and thesecond surface 11 b of theflexible substrate 11 at a predetermined location and aconductive substance 18 is formed on an inside surface of the throughhole 17 to allow for selective signal communication between the firstconductive layer 12 and the secondconductive layer 15 of thefirst surface 11 a and thesecond surface 11 b of theflexible substrate 11. The structure of double-sided circuit substrate can be alternatively realized by bonding two single-sided circuit substrates in a back-to-back manner. - The
flexible substrate 11 is divided in the extension direction I into afirst connection section 2, asecond connection section 3, and acluster section 4 between the first andsecond connection sections first connection section 2 is located at an end of thecluster section 4, while thesecond connection section 3 is located at an opposite end of theflexible substrate 11 that is opposite to thefirst connection section 2. - The
cluster section 4 comprises a plurality ofcluster strips 41 that is formed by slitting theflexible substrate 11 in the extension direction I. All or some of the cluster strips 41 is provided with a signal line to serve as an electrical signal transmission path between thefirst connection section 2 and thesecond connection section 3. Thecluster section 4 may selectively form a plurality of tear stop holes 214 at suitable locations of terminals of all or some cluster strips 41 (for example, in thefirst connection section 2 and the second connection section 3) in order to protect the cluster strips 41 from damage caused by undesired tearing along the slitting during the assembling or use of theflexible substrate 11. - The
first connection section 2 comprises astack structure 20. With also reference toFIGS. 4 and 5 , thestack structure 20 divides thefirst connection section 2 into acentral zone 21 andside stacking zones central zone 21. Theside stacking zones side stacking zones central zone 21 is allowed to fold along a physical orimagination fold line central zone 21 so as to have theside stacking zones central zone 21 or on a portion of thecentral zone 21. In this way, the width of thefirst connection section 2 that is a dimension measured in a direction perpendicular to the extension direction I of theflexible substrate 11 is reduced. Thesecond connection section 3 may also be provided with a similar stack structure to allow twoside stacking zones central zone 31 of thesecond connection section 3 to be stacked under thecentral zone 31 or on a portion of thecentral zone 31. After the stacking operation, a structure shown inFIG. 4 is formed. - In a practical application, the
first connection section 2 and thesecond connection section 3 may be provided with different types of connection socket or terminal plug at predetermined locations thereof. For example, as shown in the embodiment ofFIG. 1 , aconnection socket 211 is set on thecentral zone 21 of thefirst connection section 2, while theside stacking zone 32 of thesecond connection section 3 forms aterminal plug 321 at a side edge thereof. It is certainly and alternatively feasible to provide same type of connection socket or terminal plug at both thefirst connection section 2 and thesecond connection section 3. For example, as shown in the embodiment ofFIG. 6 , thecentral zone 21 of thefirst connection section 2 is mounted with aconnection socket 211 and theside stacking zone 31 of thesecond connection section 3 is also provided with aconnection socket 311. - Further, the connection sections and the cluster section of the flexible substrate can be arranged in a one-to-one fashion, or alternatively a one-to-plurality fashion can be adopted. For example, in the embodiment of
FIG. 1 , an arrangement that a connection section is connected by a single cluster section to an opposite connection section is provided. However, in the embodiment ofFIG. 7 , a different arrangement that asecond connection section 3 is connected bycluster strips 41 of acluster section 4 to afirst connection section 2 and is also connected bycluster strips 41 a of anadditional cluster section 4 a to an additionalfirst connection section 2 a is provided. Practical application may need different variations to meet different requirements. - In an embodiment of the present invention, at least one
bundling structure 5 is provided to loop around or bundle thecluster section 4 of theflexible substrate 11 at a predetermined location (seeFIG. 4 ) so as to bundle the cluster strips 41 of thecluster section 4 together to form a bundled structure.FIG. 8 shows a cross-sectional view taken along line 8-8 ofFIG. 4 . In a preferred embodiment of the present invention, the bundlingstructure 5 comprises anelectromagnetic shielding layer 51. In other words, the bundlingstructure 5 comprises a structure that is made of an electromagnetic shielding substance looping around the predetermined location of thecluster section 4, so as to loop or bundle the cluster strips 41 of thecluster section 4 together to form a bundled structure and also to provide electromagnetic shielding to thecluster section 4. The bundlingstructure 5 can be alternatively made of an insulation material (such as a water-proof plastic band) or a composite combination of electromagnetic shielding substance and insulation material can be used to form the bundling structure. -
FIG. 9 illustrates an example application of the present invention in a mobile phone that has a hinge structure. As shown, the bundled flexibleflat circuit cable 100 is set through ahinge structure 6 with the cluster strips 41 of thecluster section 4 of theflexible substrate 11 and thefirst connection section 2 and thesecond connection section 3 are respectively set on opposite sides of thehinge structure 6. With the electromagnetic shielding effect provided by theelectromagnetic shielding layer 51 of thebundling structure 5, electromagnetic interference occurring in the electrical signals transmitted through a transmission path defined by the cluster strips 41 of thecluster section 4 can be effectively eliminated. - In an alternative application, an outer surface of the
electromagnetic shielding layer 51 may be further surrounded by an outer insulation layer 52 (seeFIG. 10 ), or alternatively, thecluster section 4 of theflexible substrate 11 is wrapped around by aninner insulation layer 53, anelectromagnetic shielding layer 51 is then wrapped around an outer surface of theinner insulation layer 53, and finally anouter insulation layer 54 is further wrapped around an outer surface of the electromagnetic shielding layer 51 (seeFIG. 11 ). - The bundling
structure 5 used in the previous embodiments is made in the form of a thin sheet, which is wrapped in a wrapping direction II around the predetermined location of the cluster section. Alternatively, a helical wrapping structure may be employed to form the bundling structure. As shown inFIG. 12 , a slender elongate band made of an electromagnetic shielding material is helically wrapped in an inclination direction III around the cluster strips 41 of thecluster section 4 to form ahelical bundling structure 5 a. The elongate band can be made of an electromagnetic shielding material including a piece of electrically conductive cloth, silver foil, aluminum foil, copper foil, and other metal foils that exhibit electromagnetic shielding characteristics. - Although the present invention has been described with reference to the preferred embodiments thereof, it is apparent to those skilled in the art that a variety of modifications and changes may be made without departing from the scope of the present invention which is intended to be defined by the appended claims.
Claims (11)
1. A bundled flexible flat circuit cable, comprising:
a flexible substrate, which extends in an extension direction and has a first surface and a second surface;
a first conductive layer, which is formed on the first surface of the flexible substrate;
at least a first connection section, which is formed on an end of the flexible substrate;
at least a second connection section, which is formed on an opposite end of the flexible substrate that is opposite to the first connection section;
at least a cluster section, which connects between the first connection section and the second connection section and comprises a plurality of cluster strips that are formed by slitting the flexible substrate in the extension direction;
a first insulation layer, which is formed on the first conductive layer; and
at least a bundling structure, which bundles the cluster section at a predetermined location to wrap the cluster strips of the cluster section together to form a bundled structure, the bundling structure comprising an elongate strap helically wrapped in an inclination direction around the predetermined location of the cluster section.
2. The bundled flexible flat circuit cable as claimed in claim 1 , wherein the first connection section comprises one of a terminal plug and a connection socket formed thereon.
3. The bundled flexible flat circuit cable as claimed in claim 1 , wherein the second connection section comprises one of a terminal plug and a connection socket formed thereon.
4. The bundled flexible flat circuit cable as claimed in claim 1 , further comprising an electromagnetic shielding layer on at least one of the first insulation layer and the second surface of the flexible substrate.
5. The bundled flexible flat circuit cable as claimed in claim 1 , further comprising:
a second conductive layer, which is formed on the second surface of the flexible substrate; and
a second insulation layer, which is foamed on the second conductive layer.
6. The bundled flexible flat circuit cable as claimed in claim 5 , further comprising an electromagnetic shielding layer on at least one of the first insulation layer and the second insulation layer.
7. The bundled flexible flat circuit cable as claimed in claim 1 , wherein the bundling structure is made of an electromagnetic shielding material.
8. The bundled flexible flat circuit cable as claimed in claim 1 , wherein the bundling structure is made of an insulation material.
9. The bundled flexible flat circuit cable as claimed in claim 1 , wherein the bundling structure comprises:
an inner insulation layer, which wraps around the cluster section; and
an electromagnetic shielding layer, which wraps around an outer surface of the inner insulation layer.
10. The bundled flexible flat circuit cable as claimed in claim 9 , wherein the electromagnetic shielding layer is further wrapped by an outer insulation layer.
11. The bundled flexible flat circuit cable as claimed in claim 1 , wherein the bundling structure comprises:
an electromagnetic shielding layer, which wraps around the cluster section; and
an outer insulation layer, which wraps around an outer surface of the electromagnetic shielding layer.
Priority Applications (1)
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US13/602,627 US20120325526A1 (en) | 2009-09-18 | 2012-09-04 | Bundled flexible flat circuit cable |
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TW098131522A TWI543209B (en) | 2009-09-18 | 2009-09-18 | Bundled soft circuit cable |
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US12/729,677 US20110067903A1 (en) | 2009-09-18 | 2010-03-23 | Bundled flexible flat circuit cable |
US13/602,627 US20120325526A1 (en) | 2009-09-18 | 2012-09-04 | Bundled flexible flat circuit cable |
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US12/729,677 Division US20110067903A1 (en) | 2009-09-18 | 2010-03-23 | Bundled flexible flat circuit cable |
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US20120325526A1 true US20120325526A1 (en) | 2012-12-27 |
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US13/602,663 Abandoned US20120325528A1 (en) | 2009-09-18 | 2012-09-04 | Bundled flexible flat circuit cable |
US13/602,646 Active 2030-04-27 US8872032B2 (en) | 2009-09-18 | 2012-09-04 | Bundled flexible flat circuit cable |
US13/602,627 Abandoned US20120325526A1 (en) | 2009-09-18 | 2012-09-04 | Bundled flexible flat circuit cable |
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US12/729,677 Abandoned US20110067903A1 (en) | 2009-09-18 | 2010-03-23 | Bundled flexible flat circuit cable |
US13/602,663 Abandoned US20120325528A1 (en) | 2009-09-18 | 2012-09-04 | Bundled flexible flat circuit cable |
US13/602,646 Active 2030-04-27 US8872032B2 (en) | 2009-09-18 | 2012-09-04 | Bundled flexible flat circuit cable |
Country Status (4)
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US (4) | US20110067903A1 (en) |
JP (1) | JP5491906B2 (en) |
KR (1) | KR101664241B1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
TW201112276A (en) | 2011-04-01 |
JP2011066379A (en) | 2011-03-31 |
US20120325527A1 (en) | 2012-12-27 |
TWI543209B (en) | 2016-07-21 |
JP5491906B2 (en) | 2014-05-14 |
KR101664241B1 (en) | 2016-10-10 |
US20110067903A1 (en) | 2011-03-24 |
KR20110031074A (en) | 2011-03-24 |
US20120325528A1 (en) | 2012-12-27 |
US8872032B2 (en) | 2014-10-28 |
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