CN212303122U

CN212303122U - FFC of stable performance

Info

Publication number: CN212303122U
Application number: CN202021175488.9U
Authority: CN
Inventors: 石晗
Original assignee: Dongguan Shenghe Technology Co ltd
Current assignee: Dongguan Shenghe Technology Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-01-05
Anticipated expiration: 2030-06-22

Abstract

The utility model belongs to the technical field of the connecting wire technique and specifically relates to indicate a FFC of stable performance, including first shielding layer, first insulating layer, conductor layer, second insulating layer and the second shielding layer of laminating in proper order, the conductor layer includes a plurality of first conductors, and is a plurality of first conductor interval sets up, the both ends of first conductor are provided with first end and second end respectively, first end and second end are located the both ends on first insulating layer, at least one the first end and/or the second end of first conductor all include first shielding conductor and second shielding conductor, first shielding conductor and second shielding conductor signal connection, first shielding conductor with first shielding layer electricity is connected or the second shielding conductor with the second shielding layer electricity is connected. The utility model provides a pair of FFC of stable performance realizes the better ground connection shielding effect of signal, improves signal transmission's stability.

Description

FFC of stable performance

Technical Field

The utility model belongs to the technical field of the connecting wire technique and specifically relates to indicate a FFC of stable performance.

Background

FFC flexible flat cable, also called winding displacement, is one kind with insulating material and extremely thin flat copper line, the novel signal cable that forms through high-tech automation equipment production line pressfitting has advantages such as soft, bending folding at will, thickness is thin, small, extensively is arranged in electronic product such as computer, printer.

The conventional FFC flexible flat cable generally shields interference of factors such as conduction and radiation of peripheral electronic products through a shielding layer, but in many occasions, due to a large number of interference factors, the interference resistance work through the shielding layer is actually insufficient, and the problem of unstable signal transmission often occurs.

Disclosure of Invention

The utility model discloses problem to prior art provides a FFC of stable performance, through set up one or many anti-interference first conductors in the conductor layer, is connected the first shielded conductor of this conductor and first shielding layer electricity or is connected second shielded conductor and second shielding layer electricity to realize the better ground effect of signal, improve signal transmission's stability.

In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a FFC of stable performance, is including the first shielding layer, first insulating layer, conductor layer, second insulating layer and the second shielding layer of laminating in proper order, first shielding layer and second shielding layer signal connection, the conductor layer includes a plurality of first conductors, and is a plurality of first conductor interval sets up, the both ends of first conductor are provided with first tip and second tip respectively, first tip and second tip are located the both ends of first insulating layer, at least one the first tip and/or the second tip of first conductor all include first shielded conductor and second shielded conductor, first shielded conductor and second shielded conductor signal connection, first shielded conductor with first shielding layer electricity is connected or the second shielded conductor with the second shielding layer electricity is connected.

Preferably, the first shielding conductor is disposed to overlap with the second shielding conductor, and the first shielding conductor is located above the second shielding conductor.

Preferably, the first shield conductor and the second shield conductor are provided in parallel.

Preferably, the FFC with stable performance further comprises a protective sleeve, the protective sleeve is sleeved on the outer surfaces of the first shielding layer and the second shielding layer, and the first shielding layer and the second shielding layer are in signal connection with the inner surface of the protective sleeve; when the first shielding conductor is electrically connected with the first shielding layer, the protective sleeve wraps the first shielding conductor, and when the second shielding conductor is electrically connected with the second shielding layer, the protective sleeve wraps the second shielding conductor.

Preferably, an upper conductive part is arranged at one end of the first shielding layer close to the first shielding conductor, a lower conductive part is arranged at one end of the second shielding layer close to the second shielding conductor, and the upper conductive part and the lower conductive part are in signal connection with the inner surface of the protective sleeve; one end of the first shielding conductor, which is far away from the first insulating layer, is connected with the upper conductive part or one end of the second shielding conductor, which is far away from the second insulating layer, is connected with the lower conductive part.

Preferably, the first shielding layer and the second shielding layer are both aluminum foil composite layers.

Preferably, the first conductor is made of tinned copper wire, silver-plated copper wire or bare copper wire.

Preferably, first shielding layer pass through the hot melt adhesive or self-adhesive with the laminating of first insulating layer, the second shielding layer pass through the hot melt adhesive or self-adhesive with the laminating of second insulating layer, first insulating layer and second insulating layer all pass through the hot melt adhesive with the conductor layer laminating. The utility model has the advantages that:

the utility model provides a pair of FFC of stable performance, set up one or many in a plurality of first conductors and be used for anti-jamming first conductor, be connected the first shield conductor of this first conductor with first shielding layer electricity or be connected second shield conductor and second shielding layer electricity, make interference signal in the transmission signal can transmit first shielding layer or second shielding layer via first shield conductor or second shield conductor, rethread first shielding layer and second shielding layer are with interference signal transmission away, thereby make this FFC flexible flat cable's transmission signal possess better ground effect, signal transmission's stability is improved, and then improve the stability of the electronic product who uses this FFC flexible flat cable.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the exploded structure of the present invention.

Fig. 3 is a schematic structural view of the first shielding conductor and the upper conductive portion according to the present invention.

Fig. 4 is a schematic structural view of the protective sheath of the present invention.

Fig. 5 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 6 is a cross-sectional view at AA in fig. 5.

The reference numerals in fig. 1 to 6 include:

1-first shielding layer, 11-upper conductive part, 2-first insulating layer, 3-second insulating layer, 4-second shielding layer, 5-first conductor, 51-first end part, 53-second end part, 6-first shielding conductor, 7-second shielding conductor, 8-protective sleeve.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.

Example 1:

the FFC with stable performance provided by this embodiment, as shown in fig. 1 to 3, includes a first shielding layer 1, a first insulating layer 2, a conductor layer, a second insulating layer 3, and a second shielding layer 4, which are sequentially attached to each other, where the first shielding layer 1 is in signal connection with the second shielding layer 4, the conductor layer includes a plurality of first conductors 5, the plurality of first conductors 5 are disposed at intervals, two ends of the first conductors 5 are respectively provided with a first end 51 and a second end 53, the first end 51 and the second end 53 are located at two ends of the first insulating layer 2, the first end 51 and/or the second end 53 of at least one first conductor 5 each includes a first shielding conductor 6 and a second shielding conductor 7, where, as shown in fig. 1, the first shielding conductor 6 overlaps the second shielding conductor 7, the first shielding conductor 6 is located above the second shielding conductor 7, the first shield conductor 6 is electrically connected to the first shield layer 1 or the second shield conductor 7 is electrically connected to the second shield layer 4. The length of the first conductor 5 added with the first end 51 and the second end 53 is substantially greater than the length of the first insulating layer 2, and the length of the second insulating layer 3 may be the same as the length of the first insulating layer 2 or the length of the first conductor 5 added with the first end 51 and the second end 53.

Preferably, the first conductor 5 is made of a tinned copper wire, a silvered copper wire or a bare copper wire; the first shielding layer 1 is attached to the first insulating layer 2 through a hot melt adhesive or a self-adhesive, the second shielding layer 4 is attached to the second insulating layer 3 through a hot melt adhesive or a self-adhesive, and the first insulating layer 2 and the second insulating layer 3 are both attached to the conductor layer through a hot melt adhesive; of course, other adhesives that can achieve adhesion and are suitable for use in the construction of the FFC flexible flat cable may be used in addition to hot melt adhesives and self-adhesive adhesives.

In particular, in practical application, the conductor layer includes a plurality of first conductors 5 side by side, one or more first conductors 5 for interference rejection are arranged in the plurality of first conductors 5, the cross section of the interference-resistant conductor is rectangular, the rectangular first conductor 5 comprises a first shielding conductor 6 and a second shielding conductor 7 which are overlapped with each other, the first shielding conductor 6 is electrically connected with the first shielding layer 1 or the second shielding conductor 7 is electrically connected with the second shielding layer 4, so that the interference signal in the transmission signal can be transmitted to the first shielding layer 1 or the second shielding layer 4 through the first shielding conductor 6 or the second shielding conductor 7, and then the interference signal is transmitted away through the first shielding layer 1 and the second shielding layer 4, therefore, transmission signals of the FFC flexible flat cable have a better grounding effect, the stability of signal transmission is improved, and the stability of an electronic product using the FFC flexible flat cable is further improved.

The FFC of stable performance that this embodiment provided, as fig. 3 and fig. 4, the FFC of stable performance still includes protective sheath 8, protective sheath 8 cover is established at the surface of first shielding layer 1 and second shielding layer 4, and protective sheath 8 wraps first shielding conductor 6 when first shielding conductor 6 is connected with first shielding layer 1 electricity, and protective sheath 8 wraps second shielding conductor 7 when second shielding conductor 7 is connected with second shielding layer 4 electricity. Preferably, the protective sheath adopts aluminium foil mylar or copper facing aluminium foil mylar or silver-plated aluminium foil mylar to make to the protective sheath forms the internal surface electrically conductive, and surface insulation's structural condition, internal surface can be simultaneously with first shielding layer and second shielding layer signal connection, both realize the function with first shielding layer and second shielding layer signal connection.

Specifically, in this embodiment, the first shielding layer 1 and the second shielding layer 4 are both aluminum foil composite layers, a laser method is adopted to burn off PET (polyester resin) on the surfaces of the first shielding layer 1 and the second shielding layer 4 to expose aluminum layers, that is, an upper conductive part and a lower conductive part (not shown in the drawing) are exposed aluminum layers, as shown in fig. 3, the first shielding conductor 6 is turned back to make the first shielding conductor 6 contact with the exposed aluminum layers to realize electrical connection, and finally, as shown in fig. 4, the protective sleeve 8 is sleeved outside the first shielding layer 1 and the second shielding layer 4, the first shielding conductor 6 and the exposed aluminum layers are both protected in the protective sleeve 8, and the inner surface of the protective sleeve 8 is attached to the first shielding conductor 6 or the exposed aluminum layers to ensure normal contact between the first shielding conductor 6 and the aluminum layers, thereby realizing signal connection. Certainly, the second shielding conductor 7 may also be in contact with the exposed aluminum layer on the second shielding layer 4, i.e., the lower conductive part, in the same manner as the first shielding conductor 6, and one of the first shielding conductor 6 or the second shielding conductor 7 is in contact with the exposed aluminum layer, so that a better grounding shielding effect can be achieved, the EMI resistance of the FFC of this embodiment is improved, the FFC flexible flat cable is more stable in use, and the stability of product signal transmission is further improved.

Example 2:

unlike embodiment 1, in this embodiment, the first shielding conductor 6 and the second shielding conductor 7 are arranged in a parallel structure, and as shown in fig. 5 and 6, when the cross section of the first conductor is not rectangular, the first shielding conductor 6 and the second shielding conductor 7 may not necessarily overlap, so that the parallel structure is adopted, and the first shielding conductor 6 and the second parallel conductor arranged in parallel are used in the same way as embodiment 1, and the first shielding conductor 6 is turned back to contact with the upper conductive part, or the second shielding conductor 7 is turned back to contact with the lower conductive part, so as to achieve a better signal shielding effect. Of course, the first shield conductor 6 and the second shield conductor may be in a positional relationship other than being juxtaposed or overlapping, as long as the first shield conductor 6 and the second shield conductor are connected to each other by a signal.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a FFC of stable performance, is including the first shielding layer, first insulating layer, conductor layer, second insulating layer and the second shielding layer of laminating in proper order, first shielding layer and second shielding layer signal connection, the conductor layer includes a plurality of first conductors, and is a plurality of first conductor interval sets up its characterized in that: the both ends of first conductor are provided with first tip and second tip respectively, first tip and second tip are located the both ends of first insulating layer, at least one first tip and/or the second tip of first conductor all include first shielded conductor and second shielded conductor, first shielded conductor and second shielded conductor signal connection, first shielded conductor with first shielding layer electricity is connected or the second shielded conductor with the second shielding layer electricity is connected.

2. The FFC of claim 1, wherein: the first shielding conductor and the second shielding conductor are arranged in an overlapping mode, and the first shielding conductor is located above the second shielding conductor.

3. The FFC of claim 1, wherein: the first shield conductor and the second shield conductor are arranged in parallel.

4. A stable FFC according to claim 1, 2 or 3 wherein: the FFC with stable performance further comprises a protective sleeve, wherein the protective sleeve is sleeved on the outer surfaces of the first shielding layer and the second shielding layer, and the first shielding layer and the second shielding layer are in signal connection with the inner surface of the protective sleeve; when the first shielding conductor is electrically connected with the first shielding layer, the protective sleeve wraps the first shielding conductor, and when the second shielding conductor is electrically connected with the second shielding layer, the protective sleeve wraps the second shielding conductor.

5. The FFC of claim 4, wherein: an upper conductive part is arranged at one end of the first shielding layer close to the first shielding conductor, a lower conductive part is arranged at one end of the second shielding layer close to the second shielding conductor, and the upper conductive part and the lower conductive part are in signal connection with the inner surface of the protective sleeve; one end of the first shielding conductor, which is far away from the first insulating layer, is connected with the upper conductive part or one end of the second shielding conductor, which is far away from the second insulating layer, is connected with the lower conductive part.

6. The FFC of claim 1, wherein: the first shielding layer and the second shielding layer are both aluminum foil composite layers.

7. The FFC of claim 1, wherein: the first conductor is made of tinned copper wires, silver-plated copper wires or bare copper wires.

8. The FFC of claim 4, wherein: the protective sleeve is made of aluminum foil mylar or copper-plated aluminum foil mylar or silver-plated aluminum foil mylar.

9. The FFC of claim 1, wherein: first shielding layer pass through hot melt adhesive or self-adhesive with the laminating of first insulating layer, the second shielding layer pass through hot melt adhesive or self-adhesive with the laminating of second insulating layer, first insulating layer and second insulating layer all pass through the hot melt adhesive with the conductor layer laminating.