Novel FPC connection structure

Abstract

The utility model discloses a novel FPC connection structure, which comprises an FPC plastic shell, a signal terminal, an organ cover and a flat cable, the FPC plastic shell is internally provided with an installation groove, the signal terminal is fixedly installed in the installation groove, and one end of the signal terminal is respectively provided with an upper force arm and a lower force arm. According to the novel FPC connection structure, the flat cable is in occlusion contact with the lower force arm in the signal terminal, the occlusion mark is uniform and does not damage the flat cable golden finger, and the occlusion mark of the flat cable golden finger is clear, obvious, damage-free and good in contact, so that the novel FPC connection structure is stable and reliable in overall contact performance, an abnormal phenomenon caused by poor contact in production and after-sale is completely eradicated, and the service life of the FPC connection structure is prolonged. Meanwhile, the grounding piece and the contact elastic piece are in direct contact with the flat cable aluminum foil, the impedance is small, the grounding effect is good, the retaining function of the signal terminal is increased, the retaining force between the flat cable and the FPC connecting structure can be increased, meanwhile, the contact areas of the upper force arm and the lower force arm and the flat cable are plated with gold, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a novel FPC connection structure. Background Art

[0002] FPC is the abbreviation of flexible printed circuit board, which is a highly reliable flexible printed circuit board made of polyimide or polyester film as the substrate. It has the characteristics of high wiring density, light weight, thin thickness and good bending properties. The FPC connection structure is used to connect PCB (printed circuit board) and FPC to achieve mechanical and electrical connection between them. However, the existing FPC connection structure still has the following defects during use:

[0003] 1. After the ordinary FPC cable is pressed down by the back cover, it contacts the terminal hard. The bite marks of the cable gold finger are uneven on the left, middle and right, deep on both sides and shallow in the middle, which will cause abnormal hidden dangers after sales;

[0004] 2. The ordinary type has no stop function, the holding force is poor, and the cable is easy to withdraw, causing the signal to disappear;

[0005] 3. Ordinary type has no grounding shrapnel, and the EMI effect is poor;

[0006] 4. In traditional electroplating, the contact area is plated with a lot of gold, and the matte tin in the welding area is easily scratched during the production process, resulting in poor corrosion resistance and unable to meet the 48-hour salt spray test requirements of some customers. At the same time, the weather resistance is poor and the storage cycle is short, which is not convenient for sea transportation and long-term storage. The terminal solder feet are low in height. After the product is soldered on the board, the terminal solder feet will be completely covered by tin, and the color of the terminal solder feet is consistent with the color of the solder paste. During AOI inspection, the boundary between the terminal and the solder paste is not obvious, which is easy to cause misjudgment;

[0007] 5. Ordinary accordion covers are easy to fall off during the opening and closing process, and the structure is not tight.

[0008] Therefore, we propose a new FPC connection structure to solve the above problems. Utility Model Content

[0009] The purpose of the utility model is to provide a novel FPC connection structure to solve the problems raised by the above background technology.

[0010] To achieve the above purpose, the utility model provides the following technical solutions: a new FPC connection structure, including an FPC plastic shell, a signal terminal, an accordion cover and a flat cable,

[0011] The FPC plastic shell has an installation slot inside, a signal terminal is fixedly installed inside the installation slot, and an upper force arm and a lower force arm are respectively provided at one end of the signal terminal;

[0012] A connecting rod is rotatably mounted on the inner side of the FPC plastic shell, an accordion cover is fixedly sleeved on the surface of the connecting rod, a rotating groove is opened inside the accordion cover, and an extrusion force arm is fixedly mounted on the bottom of the accordion cover;

[0013] A grounding sheet is fixedly installed on the inner side of the FPC plastic shell, and a contact spring is fixedly installed on the grounding sheet;

[0014] The accordion cover is symmetrically provided with docking grooves, the docking grooves are fixedly provided with buckles, and the FPC plastic housing is movably plugged with a flat cable.

[0015] Preferably, the mounting grooves are opened at equal intervals inside the FPC plastic housing, and signal terminals are correspondingly installed inside the mounting grooves, and the welding ends of the signal terminals and the contact areas of the upper force arm and the lower force arm with the flat cable are all gold-plated.

[0016] The above structural design enables the signal terminal to be tightly connected to the gold finger of the cable through the upper force arm and the lower force arm, and the bite marks at the connection are clear, which is conducive to improving conductivity. The gold-plated setting can meet the signal transmission requirements of low impedance and low attenuation.

[0017] Preferably, the accordion cover and the extrusion force arm are rotatably connected to the connecting rotating rod, and the rotation grooves are opened at equal intervals inside the accordion cover, and the rotation grooves correspond to the upper force arm.

[0018] The above-mentioned structural design facilitates the accordion cover and the extrusion force arm to rotate through the connecting rod, thereby facilitating the smooth opening and closing of the accordion cover, and the setting of the rotating groove can avoid the rotation of the accordion cover and the upper force arm from generating motion repulsion, thereby improving the use effect.

[0019] Preferably, the extrusion force arm is connected to the upper force arm in a staggered locking manner, and the extrusion force arm is extruded and connected to the cable when the accordion cover is closed.

[0020] The above-mentioned structural design enables the accordion cover to lock the upper force arm, thereby preventing the signal terminal from falling off from the mounting slot, thereby improving the holding force between the flat cable and the FPC connection structure. The accordion cover can squeeze and position the flat cable when closed, thereby improving the connection stability between the new FPC connection structure and the flat cable.

[0021] Preferably, the grounding sheet and the contact spring sheet form an elastic structure, and the contact spring sheet is arranged in a "V"-shaped structure, and the contact spring sheet fits tightly with the connected flat cable.

[0022] The above structural design facilitates direct contact between the contact spring and the aluminum foil of the cable, has the advantage of low impedance, and improves the grounding effect.

[0023] Preferably, the buckles are symmetrically distributed on the accordion cover, and the accordion cover is snap-connected with the contact springs through the buckles after being closed.

[0024] The above structural design makes it easy for the accordion cover to be positioned by means of the snap connection between the buckle and the contact spring when closing, thereby preventing the accordion cover from falling off after closing and improving the overall structural stability.

[0025] Compared with the prior art, the beneficial effects of the utility model are: the new FPC connection structure;

[0026] 1. The cable is in bite contact with the lower force arm in the signal terminal, and the bite marks are even without damaging the cable gold fingers. The bite marks of the cable gold fingers are clear and obvious, without damage and in good contact, making the overall contact performance of the new FPC connection structure stable and reliable, eliminating abnormal phenomena caused by poor contact during production and after-sales. At the same time, the grounding sheet and the contact spring are in direct contact with the cable aluminum foil, with low impedance and good grounding effect;

[0027] 2. Adding the stop function of the signal terminal can increase the holding force between the cable and the FPC connection structure to prevent loosening and signal loss. At the same time, the contact area between the upper and lower arm and the cable is gold-plated, which is conducive to cost saving. In addition, the use of gold plating in the welding area is conducive to increasing the corrosion resistance and improving the AOI detection effect.

[0028] 3. The accordion cover is locked by an interlaced structure between the extrusion force arm and the upper force arm, which can not only prevent the signal terminal from falling off, but also ensure that the accordion cover does not fall off, thereby improving the stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a side view of the structure of the utility model;

[0030] Figure 2 This is a schematic diagram of the distribution structure of the signal terminal of the utility model inside the PC plastic shell;

[0031] Figure 3 This is a schematic diagram of the connection structure between the signal terminal and the accordion cover of the utility model;

[0032] Figure 4 This is a schematic diagram of the connection structure between the extrusion force arm and the cable arrangement of the utility model;

[0033] Figure 5 It is a schematic diagram of the contact spring and buckle separation structure of the utility model.

[0034] In the figure: 1. FPC plastic shell; 2. Installation slot; 3. Signal terminal; 4. Upper force arm; 5. Lower force arm; 6. Connecting lever; 7. Organ cover; 8. Rotation slot; 9. Extrusion force arm; 10. Grounding plate; 11. Contact spring; 12. Docking slot; 13. Buckle; 14. Cable arrangement. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] See also Figure 1-5 The utility model provides a technical solution: a new FPC connection structure, including an FPC plastic shell 1, a signal terminal 3, an accordion cover 7 and a flat cable 14, an installation groove 2 is opened inside the FPC plastic shell 1, and the installation groove 2 is opened at equal intervals inside the FPC plastic shell 1, and the signal terminal 3 is fixedly installed inside the installation groove 2, and the signal terminal 3 is correspondingly installed inside the installation groove 2, and one end of the signal terminal 3 is respectively provided with an upper force arm 4 and a lower force arm 5, and the welding end of the signal terminal 3 and the upper force arm 4 and the contact area of ​​the lower force arm 5 with the flat cable 14 are all gold-plated. The design of the above structure enables the flat cable 14 to be plugged and connected with the new FPC connection structure. The signal terminal 3 can cooperate with the upper force arm 4 and the lower force arm 5 to stably bite the gold fingers of the flat cable 14, and has the advantages of clear and obvious bite marks, no damage and good contact, wherein the setting of the installation groove 2 can stably install the signal terminal 3, the upper force arm 4 and the lower force arm 5, thereby improving the structural stability.

[0037] A connecting rod 6 is rotatably mounted on the inner side of the FPC plastic housing 1, and an accordion cover 7 is fixedly sleeved on the surface of the connecting rod 6. The accordion cover 7 and the extrusion force arm 9 are rotatably connected to the connecting rod 6. A rotation groove 8 is opened inside the accordion cover 7, and the rotation groove 8 is opened at equal intervals inside the accordion cover 7, and the rotation groove 8 corresponds to the upper force arm 4. An extrusion force arm 9 is fixedly mounted on the bottom of the accordion cover 7, and the extrusion force arm 9 is connected to the upper force arm 4 in an interlaced lock, and the extrusion force arm 9 is extruded and connected to the flat cable 14 when the accordion cover 7 is closed. The structural design enables the accordion cover 7 and the squeezing force arm 9 to rotate and open and close in coordination with the connecting rotating rod 6, which is beneficial for squeezing and positioning the plugged-in cable 14 when closing, thereby improving the connection stability. The setting of the rotating groove 8 can ensure that the rotation of the accordion cover 7 on the outside of the upper force arm 4 is not affected, thereby improving the ease of use. The staggered connection between the squeezing force arm 9 and the upper force arm 4 can position the upper force arm 4 and the signal terminal 3, thereby preventing the signal terminal 3, the upper force arm 4 and the lower force arm 5 from falling off, thereby improving the anti-fall-off effect.

[0038] A grounding sheet 10 is fixedly installed on the inner side of the FPC plastic shell 1, and a contact spring 11 is fixedly installed on the grounding sheet 10. The grounding sheet 10 and the contact spring 11 form an elastic structure, and the contact spring 11 is arranged in a "V"-shaped structure, and the contact spring 11 is tightly fitted with the plugged flat cable 14. The design of the above structure enables the bottom of the contact spring 11 to be tightly fitted with the aluminum foil of the plugged flat cable 14, so as to cooperate with the grounding sheet 10 and the FPC plastic shell 1 for grounding work, which has the advantage of small impedance and improves the grounding effect.

[0039] The interior of the accordion cover 7 is symmetrically provided with docking grooves 12, and a buckle 13 is fixedly installed inside the docking groove 12. The interior of the FPC plastic shell 1 is movably connected with a flat cable 14. The buckles 13 are symmetrically distributed on the accordion cover 7, and the accordion cover 7 is snap-connected with the contact spring piece 11 through the buckle 13 after closing. The design of the above structure makes it easy for the accordion cover 7 to be closed in a matching manner due to the setting of the docking groove 12, and the snap-connection between the buckle 13 and the contact spring piece 11 can be used to position the accordion cover 7 after closing, thereby improving the closing stability of the accordion cover 7.

[0040] Working principle: When using this new FPC connection structure, first Figure 1-5As shown, the gold finger end of the flat cable 14 is inserted into the inside of the FPC plastic shell 1, so that the gold finger of the flat cable 14 cooperates with the elastic structure of the lower force arm 5 to be tightly connected with the upper force arm 4 and the lower force arm 5 on the signal terminal 3, and then the accordion cover 7 is rotated, so that the accordion cover 7 and the extrusion force arm 9 can cooperate with the connection rotating rod 6 to rotate, until the accordion cover 7 is rotated to the buckle 13 and the contact spring 11 to be connected, at this time, the extrusion force arm 9 can squeeze the plugged flat cable 14 after rotation, so as to complete the connection work, and after the connection, the bottom end of the contact spring 11 will also be tightly fitted with the aluminum foil on the flat cable 14, so as to cooperate with the grounding plate 10 and the FPC plastic shell 1 to achieve grounding work;

[0041] During disassembly, the accordion cover 7 is flipped over forcefully to force the buckle 13 to separate from the contact spring 11. At the same time, the rotation of the accordion cover 7 will release the squeezing engagement between the squeezing force arm 9 and the flat cable 14, so as to release the restriction on the flat cable 14 and realize the separation of the flat cable 14 and the new FPC connection structure.

[0042] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel FPC connection structure, comprising an FPC plastic housing (1), a signal terminal (3), an accordion cover (7) and a flat cable (14), characterized in that: The FPC plastic housing (1) is provided with a mounting groove (2), a signal terminal (3) is fixedly installed inside the mounting groove (2), and an upper force arm (4) and a lower force arm (5) are respectively provided at one end of the signal terminal (3); A connecting rod (6) is rotatably mounted on the inner side of the FPC plastic housing (1); an accordion cover (7) is fixedly sleeved on the surface of the connecting rod (6); a rotating groove (8) is provided inside the accordion cover (7); and an extrusion force arm (9) is fixedly mounted on the bottom of the accordion cover (7); A grounding sheet (10) is fixedly mounted on the inner side of the FPC plastic housing (1), and a contact spring (11) is fixedly mounted on the grounding sheet (10); The accordion cover (7) is symmetrically provided with a docking groove (12), a buckle (13) is fixedly installed inside the docking groove (12), and a flat cable (14) is movably inserted inside the FPC plastic shell (1).

2. A novel FPC connection structure according to claim 1, characterized in that: The mounting grooves (2) are arranged at equal intervals inside the FPC plastic housing (1), and signal terminals (3) are correspondingly installed inside the mounting grooves (2), and the welding ends of the signal terminals (3) and the contact areas of the upper force arm (4) and the lower force arm (5) with the flat cable (14) are all gold-plated.

3. A novel FPC connection structure according to claim 1, characterized in that: The accordion cover (7) and the extrusion force arm (9) are rotatably connected to the connecting rotating rod (6), and the rotation grooves (8) are opened at equal intervals inside the accordion cover (7), and the rotation grooves (8) correspond to the upper force arm (4).

4. A novel FPC connection structure according to claim 1, characterized in that: The extrusion force arm (9) is connected to the upper force arm (4) in an interlaced locking manner, and the extrusion force arm (9) is extruded and connected to the cable (14) when the accordion cover (7) is closed.

5. A novel FPC connection structure according to claim 1, characterized in that: The grounding sheet (10) and the contact spring sheet (11) form an elastic structure, and the contact spring sheet (11) is arranged in a "V"-shaped structure, and the contact spring sheet (11) is tightly fitted to the connected flat cable (14).

6. A novel FPC connection structure according to claim 1, characterized in that: The buckles (13) are symmetrically distributed on the accordion cover (7), and the accordion cover (7) is snap-connected with the contact spring sheet (11) through the buckles (13) after being closed.

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