FPC (Flexible Printed Circuit) structure adaptive to fork-shaped terminal

Abstract

The utility model discloses a flexible printed circuit (FPC) structure adapted to a fork type terminal, the FPC comprises a conductor circuit, an inner insulating layer and an outer insulating layer, the conductor circuit is distributed along the surface of the inner insulating layer, and a first circuit section and a second circuit section are respectively formed on two sides of the inner insulating layer. And the outer insulating layers respectively cover the outer sides of the first circuit section and the second circuit section, and a plug-in conduction area matched with the fork-shaped terminal is formed at the free end of the conductor circuit, so that the conductor circuit of the FPC is completely exposed at the plug-in end, smooth plug-in matching of the FPC and the fork-shaped terminal can be ensured, and double-contact conduction is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to flexible circuit board technical field, concretely relates to the FPC structure of adaptation fork terminal. BACKGROUND

[0002] Traditional FPC connector such as Figure 1a As shown in the figure, the terminal 1' of the connector is usually set as fork type, and the contact 2' is arranged on both sides of the terminal 1', so that the FPC 3' can realize conduction on both sides of insertion, because the FPC 3' is relatively soft, and the FPC 3' needs a certain rigidity and thickness when being inserted into the connector, so a reinforcing plate 4' is usually attached to the head of the FPC 3', as shown in Figure 1b This will cause the reinforcing plate 4' to cover the conductor 5' on one side of the FPC 3', when the FPC is inserted into the connector, one contact of the fork terminal 1' contacts the FPC conductor 5', and the other contact only contacts the reinforcing plate 4', so that stable conduction of the double contacts cannot be realized.

[0003] A double-sided conduction FPC is disclosed in Chinese patent CN 221553532 U, which is composed of a center adhesive film layer, a first copper foil layer, a second copper foil layer, a first adhesive film protective layer, a second adhesive film protective layer and a solder block, two adhesive film protective layers are arranged on the outer sides of the two copper foil layers, and the solder block connects the two copper foil layers, so that the conductors on both sides of the FPC are conducted through the solder block.

[0004] However, the FPC structure provided by the above-mentioned scheme is complex, and the plug-in cooperation with the fork terminal is unstable.

[0005] Therefore, how to realize the double-contact conduction of the FPC and the fork terminal, and effectively improve the plug-in cooperation stability has become a problem to be solved in the field. UTILITY MODEL CONTENTS

[0006] In view of the defects of the prior art, the purpose of the utility model is to provide an FPC structure adapted to the fork terminal, which can realize double-contact conduction and stable plug-in cooperation.

[0007] In order to achieve the above-mentioned purpose, the FPC structure adapted to the fork terminal provided by the utility model is used to cooperate with the fork double-contact terminal, which comprises an FPC, the FPC comprises a conductor circuit, an inner insulating layer and an outer insulating layer,

[0008] The conductor circuit is distributed along the surface of the inner insulating layer, and the first line segment and the second line segment are respectively formed on both sides of the inner insulating layer, the outer insulating layer is respectively covered on the outer side of the first line segment and the second line segment, and the plug-in conduction area matched with the fork terminal is formed at the free end of the conductor circuit.

[0009] The inner layer insulation layer is composed of a flexible continuous first inner layer insulation section and a second inner layer insulation section in opposite distribution.

[0010] Further, a reinforcing plate is arranged between the first inner layer insulation section and the second inner layer insulation section.

[0011] Further, the inner layer insulation layer is composed of a rigid continuous first inner layer insulation section and a second inner layer insulation section in opposite distribution.

[0012] Further, the outer layer insulation layer comprises a discontinuous first outer layer insulation section and a second outer layer insulation section, and the first outer layer insulation section and the second outer layer insulation section are arranged on the first line section and the second line section respectively.

[0013] Further, the end portions of the first outer layer insulation section and the second outer layer insulation section are aligned.

[0014] Further, a through distance is formed between the first outer layer insulation section and the second outer layer insulation section and the first end portion respectively.

[0015] Further, a plug-in notch is arranged on the free end of the conductor line.

[0016] The FPC structure provided by the utility model is suitable for the fork terminal, sets up two layers of insulation layers to protect the FPC, meanwhile, the conductor line of the FPC is completely exposed on the free end to form a plug-in through area, can ensure that the FPC and the fork terminal are smoothly plugged and matched, and realizes double contact through. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further illustrated below in combination with the drawings and specific embodiments.

[0018] Figure 1a It is a structural schematic view of the FPC connector in the prior art;

[0019] Figure 1b It is a structural schematic view of the FPC in the prior art.

[0020] Figure 2 It is a structural schematic view of the FPC structure suitable for the fork terminal provided by the utility model;

[0021] Figure 3 It is a partial enlarged schematic view of Figure 2

[0022] Figure 4 It is a sectional view of the FPC structure suitable for the fork terminal in the utility model;

[0023] Figure 5 It is an unfolded schematic view of the FPC in the utility model;

[0024] ​Figure 6 is a structure diagram of a fork terminal in the utility model;

[0025] Figure 7 and Figure 8 is a cooperation diagram of the fork terminal and FPC in the utility model;

[0026] Reference signs:

[0027] 1. FPC; 2. fork terminal; 21. elastic arm; 22. contact point; 23. eight-shaped insertion interface; 24. insertion cavity;

[0028] 3. conductor line; 31. first line section; 311. first end; 312. second end; 32. second line section; 33. insertion slot; 34. insertion conduction area;

[0029] 4. inner layer insulation layer; 41. first inner layer insulation section; 42. second inner layer insulation section;

[0030] 5. outer layer insulation layer; 51. first outer layer insulation section; 52. second outer layer insulation section;

[0031] 6. reinforcing plate. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific drawings.

[0033] Example one

[0034] Referring to Figures 2 to 4 , which shows one example of the FPC structure of the adapted fork terminal provided by the utility model.

[0035] As shown in the drawing, the FPC structure of the adapted fork terminal in the example is used to cooperate with the fork terminal 2, comprising the FPC 1, and the FPC 1 comprises the conductor line 3, the inner layer insulation layer 4 and the outer layer insulation layer 5.

[0036] The conductor line 3 is distributed along the surface of the inner layer insulation layer 4, and the first line section 31 and the second line section 32 are formed on both sides of the inner layer insulation layer 4 respectively, the outer layer insulation layer 5 is covered on the outer side of the first line section 31 and the second line section 32 respectively, and the insertion conduction area 34 adapted to the fork terminal 2 is formed on the free end of the conductor line 3, the conductor line 3 is completely exposed at the insertion end, so as to ensure that the FPC 1 and the fork terminal 2 are smoothly inserted and cooperated, and double contact conduction is realized.

[0037] In combination with Figure 3 and Figure 4, specifically, the conductor line 3 comprises a continuous first line segment 31 and a second line segment 32, and the first line segment 31 and the second line segment 32 are oppositely distributed along the first end 111 of the first line segment 31, so that the conductor line 3 forms double-sided conduction at the first end 111.

[0038] In combination Figure 5 , as an example, in the present example, the first line segment 31 and the second line segment 32 are composed of flexible lines, so that the opposite distribution of the first line segment 31 and the second line segment 32 can be realized by bending the second line segment 32 along the first end 111 of the first line segment 31 downward, and the first end 111 of the first line segment 31 constitutes the free end of the conductor line 3.

[0039] In the present example, the first line segment 31 is horizontally distributed, and the second line segment 32 is distributed below the first end 311 of the first line segment 31 after being bent, and is in U-shaped distribution with the first line segment 31, preferably, the length of the first line segment 31 is greater than the length of the second line segment 32.

[0040] In this way, the entire conductor line 3 is horizontally distributed at the second end 312, which can ensure the stability of the FPC 1 after plugging, and the entire conductor line 3 is in U-shaped distribution at the first end 311, so that the first end 311 of the conductor line 3 realizes double-sided conduction through the continuous U-shaped distribution of the first line segment 31 and the second line segment 32.

[0041] In combination Figure 3 Further, the plurality of conductor lines 3 are evenly distributed in parallel, so that the plurality of conductor lines 3 cooperate to constitute the conductor of the FPC 1, and the first end 311 of the conductor is in U-shaped distribution, which can be in conduction with the fork terminal 2 on both sides of the conductor.

[0042] Here, the specific structure of the conductor line 3 is a conventional technical means in the art, as an example, the conductor line 3 can be composed of existing flexible copper foil.

[0043] In order to ensure the structural stability of the conductor line 3, the inner layer insulation layer 4 is arranged on the inner side of the conductor line 3, and the outer layer insulation layer 5 is arranged on the outer side of the conductor line 3, so that the inner layer insulation layer 4 and the outer layer insulation layer 5 cooperate to protect the conductor line 3.

[0044] In combination Figure 4 , specifically, the inner layer insulation layer 4 comprises a continuous first inner layer insulation segment 41 and a second inner layer insulation segment 42, and the first inner layer insulation segment 41 and the second inner layer insulation segment 42 are oppositely distributed, so that the first inner layer insulation segment 41 is distributed on the inner side of the first line segment 31, the second inner layer insulation segment 42 is distributed on the inner side of the second line segment 32, and the first inner layer insulation segment 41 and the second inner layer insulation segment 42 are in continuous U-shaped distribution adapted to the conductor line 3.

[0045] In combination Figure 5 For example, in this embodiment, the inner insulation layer 4 is composed of a flexible continuous first inner insulation section 41 and a second inner insulation section 42, so that when the second line section 32 is bent downward along the first end portion 111, the first inner insulation section 41 and the second inner insulation section 42 can be bent synchronously, realizing the relative distribution of the first inner insulation section 41 and the second inner insulation section 42.

[0046] In this way, the inner insulation layer 4 cooperates with the continuous first inner insulation section 41 and the second inner insulation section 42 to protect the first line section 31 and the second line section 32 of the conductor line 3 respectively, while supporting the U-shaped distribution of the first line section 31 and the second line section 32 at the first end portion 311, ensuring the structural stability of the conductor line 3.

[0047] In combination Figure 3 And Figure 4 In order to improve the structural stability of the inner insulation layer 4 and the conductor line 3, a reinforcing plate 6 is arranged between the first line section 31 and the second line section 32 of the conductor line 3, specifically, the reinforcing plate 6 is arranged between the first inner insulation section 41 and the second inner insulation section 42, so that the reinforcing plate 6 can enhance the overall thickness of the conductor line 3, and also support the U-shaped distribution of the first line section 31 and the second line section 32 at the first end portion 311, ensuring the structural stability of the conductor line 3.

[0048] Here, the specific structure of the reinforcing plate 6 is a conventional technical means in the art, for example, the reinforcing plate 6 can be composed of existing glass fiber reinforcing plate or polytetrafluoroethylene reinforcing plate.

[0049] In combination Figure 4 Further, the outer insulation layer 5 includes a discontinuous first outer insulation section 51 and a second outer insulation section 52, and the first outer insulation section 51 and the second outer insulation section 52 are arranged outside the first line section 31 and the second line section 32 respectively, so that the outer insulation layer 5 cooperates with the discontinuous first outer insulation section 51 and the second outer insulation section 52 to protect the first line section 31 and the second line section 32 respectively.

[0050] In combination Figure 3 And Figure 4 At the same time, the first outer insulation section 51 and the second outer insulation section 52 form a through gap L between the first end portion 311 respectively, and the end portions of the first outer insulation section 51 and the second outer insulation section 52 are aligned, so that the first line section 31 and the second line section 32 are exposed in the through gap L to form a plug-through area 34, thereby forming a double-sided through of the conductor line 3 in the plug-through area 34.

[0051] Here, the length of the conduction interval L should be adapted to the insertion cavity 24 of the fork terminal 2 (as shown in Figure 6 ), so that the insertion conduction area 34 is adapted to the fork terminal 2 to ensure that when the FPC 1 is inserted into the fork terminal 2, the two contacts on the fork terminal 2 can respectively contact and conduct with any position of the first line segment 31 and the second line segment 32 in the insertion conduction area 34.

[0052] In combination Figure 5 , as an example, in this example, the first outer insulation segment 51 and the second outer insulation segment 52 of the outer insulation layer 5 are respectively arranged on the first line segment 31 and the second line segment 32, and at the same time, a gap is formed between the first outer insulation segment 51 and the second outer insulation segment 52, and the gap is at least 2 times the conduction interval L, so that when the second line segment 32 is bent downward along the first end 111, the second outer insulation segment 52 can be bent synchronously, and the first outer insulation segment 51 and the second outer insulation segment 52 are respectively arranged on the outside of the first line segment 31 and the second line segment 32, and the insertion conduction area 34 is formed synchronously.

[0053] Here, the specific structure of the inner insulation layer 4 and the outer insulation layer 5 is a conventional technical means in the art, and as an example, the inner insulation layer 4 and the outer insulation layer 5 can be composed of existing polyimide film or polyester film.

[0054] In combination Figure 3 and Figure 4 Since the conductor line 3 is in a U-shaped distribution at the first end 311 as a whole, the strength of the bending area of the first end 311 is weak, in order to ensure the stability of the insertion fit between the FPC 1 and the fork terminal 2, the first end 311 is provided with an insertion notch 33, so that the insertion notch 33 is distributed in the bending area of the first line segment 31 and the second line segment 32, and the inner insulation layer 4 inside the first line segment 31 and the second line segment 32 at the bending area of the first end 311 is exposed, so that the fork terminal 2 cooperates with the insertion notch 33 and the inner insulation layer 4 to ensure the stability of the insertion fit.

[0055] In combination Figure 6 , in cooperation therewith, the fork terminal 2 includes two symmetrically distributed elastic arms 21 to form an insertion cavity 24, and the working surface of the elastic arm 21 is provided with a contact 22, so that the inner side of the fork terminal 2 is respectively provided with a contact 22, which can contact and conduct with the first line segment 31 and the second line segment 32 exposed by the conduction interval L.

[0056] Further, the two elastic arms 21 and the contacts 22 cooperate with the end of the fork terminal 2 to form a splayed insertion port 23.

[0057] In combination Figure 7 and Figure 8In this way, when the fork terminal 2 is plugged with the FPC 1, the two contacts 22 of the fork terminal 2 first contact the inner layer insulation layer 4 of the exposed first end 311 bending area, and as the plugging force continues to increase, the eight-shaped plugging port 23 of the fork terminal 2 gradually expands, so that the two contacts 22 gradually contact the first line segment 31 and the second line segment 32 from the inner layer insulation layer 4, respectively, thereby effectively reducing the initial plugging force of the fork terminal 2, avoiding the direct extrusion of the contact 22 to the bending area of the conductor line 3, preventing the fork terminal 2 from extruding and damaging the bending area of the conductor line 3, thereby ensuring the stability of the plugging.

[0058] Embodiment two

[0059] On the basis of the first embodiment, the inner layer insulation layer 4 can also be composed of a rigid continuous first inner layer insulation segment 41 and a second inner layer insulation segment 42 distributed oppositely, so that the first inner layer insulation segment 41 and the second inner layer insulation segment 42 cooperate with each other to form an inner layer insulation layer 4 with a certain thickness and rigidity, and the inner layer insulation layer 4 is arranged on the inner side of the first line segment 31 and aligned with the first end 311 of the first line segment 31.

[0060] In this way, when the second line segment 32 is bent downward along the first end 111 of the first line segment 31, the second line segment 32 can be bent and distributed on the outer side of the inner layer insulation layer 4 at the same time, so that the inner layer insulation layer 4 is arranged on the inner side of the conductor line 3, and the relative distribution of the first line segment 31 and the second line segment 32 is realized at the same time.

[0061] Since the inner layer insulation layer 4 has a certain thickness and rigidity, it can stably support the U-shaped distribution of the first line segment 31 and the second line segment 32 at the first end 311, and at the same time ensure the stability of the FPC 1, so that it is not necessary to set a reinforcing plate.

[0062] Here, as an example, the inner layer insulation layer 4 can be composed of an existing magnesium oxide insulation layer or a mica tape insulation layer to ensure that the inner layer insulation layer 4 has a certain thickness and rigidity.

[0063] The FPC structure provided by the utility model discloses an adaptive fork terminal, which is provided with upper and lower insulation skins and a reinforcing plate, ensures that the FPC has good rigidity and thickness, and at the same time, the conductor line of the FPC is completely exposed at the plugging end, which can ensure that the FPC and the fork terminal are smoothly plugged and matched, and realize double-contact conduction.

[0064] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An FPC structure adapted to a fork terminal for mating with the fork terminal, comprising an FPC, characterized by, The FPC comprises conductor lines, an inner insulating layer and an outer insulating layer, The conductor lines are distributed along the surface of the inner insulating layer and form a first line section and a second line section on both sides of the inner insulating layer respectively, and the outer insulating layer covers the outer side of the first line section and the second line section respectively and forms a plug-in conducting area at the free end of the conductor lines which is adapted to the fork terminal.

2. The FPC structure adapted to the fork terminal according to claim 1, characterized by, The inner insulating layer is composed of a flexible continuous first inner insulating section and a second inner insulating section which are oppositely distributed.

3. The FPC structure adapted to the fork terminal according to claim 2, characterized by, A reinforcing plate is arranged between the first inner insulating section and the second inner insulating section.

4. The FPC structure adapted to the fork terminal according to claim 1, characterized by, The inner insulating layer is composed of a rigid continuous first inner insulating section and a second inner insulating section which are oppositely distributed.

5. The FPC structure adapted to the fork terminal according to claim 1, characterized by, The outer insulating layer comprises discontinuous first outer insulating sections and second outer insulating sections which are arranged on the first line section and the second line section respectively.

6. The FPC structure adapted to the fork terminal according to claim 5, characterized by The end of the first outer insulating section and the end of the second outer insulating section are aligned.

7. The FPC structure adapted to the fork terminal according to claim 5, characterized by A conducting space is formed between the first end of the first line section and the first outer insulating section and the second outer insulating section respectively.

8. The FPC structure adapted to the fork terminal according to claim 1, characterized by, A plug-in notch is arranged at the free end of the conductor lines.

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