FFC (Flexible Flat Cable) and switching equipment

Abstract

The utility model discloses a flexible flat cable (FFC) and switching equipment, the FFC comprises a base band and two connecting plugs, the base band comprises a main band body and a plurality of leads arranged at intervals, and each lead is fixed on the main band body; the connecting plug is used for being inserted into an FFC socket in a controller and comprises branch belt bodies and a plurality of golden fingers fixed to the branch belt bodies, the two branch belt bodies are connected with the two ends of the main belt body in the length direction respectively, the two ends of the wire are connected with the two corresponding golden fingers respectively, and the ends, away from the main belt body, of the branch belt bodies and the golden fingers are arranged at intervals. According to the FFC flat cable, one end, far away from the main belt body, of the branch belt body and the golden fingers are arranged at intervals, the golden fingers in the FFC flat cable are subjected to blank design, the length of the golden fingers at the head end is properly shortened, and through the design, when a connecting plug is inserted into an FFC socket, the inclined contact angle of the golden fingers and the FFC socket is increased, and the service life of the FFC flat cable is prolonged. The fault-tolerant rate of short circuit caused by inclined insertion of the connecting plug can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible flat cable connection structures, and particularly relates to an FFC cable and a switching device. Background Art

[0002] Flexible flat cable, abbreviated as FFC cable, can arbitrarily select the number of wires and the spacing, making the connection more convenient, greatly reducing the volume of electronic products, reducing production costs, and improving production efficiency. It is most suitable for use as a data transmission cable between mobile components and the main board, as well as in miniaturized electrical equipment.

[0003] In a multimedia interactive all-in-one machine, the TCON display logic board and the OC scanning drive side board are usually connected by an FFC flexible cable. Specifically, as Figure 1 and Figure 2 shown, FFC sockets 10 are provided in both the TCON display logic board and the OC scanning drive side board. A plurality of spaced contact pieces 11 are provided in the FFC socket 10. Metal strips 20 are provided at both ends of the FFC cable at intervals. When the FFC cable is inserted into the FFC socket 10, each metal strip 20 can be respectively connected to each contact piece 11 to achieve the conduction function.

[0004] However, when the FFC cable is manually inserted at an angle during the insertion operation, the metal strip 20 on the FFC cable will come into contact with other adjacent contact pieces 11 in the FFC socket, easily causing a short circuit during insertion. After the short circuit, abnormal phenomena usually appear in the display screen of the display device. Content of the Utility Model

[0005] The purpose of the utility model is to provide an FFC cable and a switching device to solve the technical problem that when the FFC cable is manually inserted at an angle during the insertion operation, the metal strip on the FFC cable will come into contact with other adjacent contact pieces in the FFC socket, easily causing a short circuit during insertion, and abnormal phenomena usually appear in the display screen of the display device after the short circuit.

[0006] The utility model is implemented as follows:

[0007] The utility model provides an FFC cable, comprising:

[0008] A baseband, the baseband includes a main band body and a plurality of spaced conductors, and each conductor is fixed on the main band body;

[0009] Two plug connectors for inserting into the FFC socket of a controller. Each plug connector includes a split strip and a plurality of gold fingers fixedly mounted on the split strip. The two split strips are respectively connected to the two ends of the main strip in the length direction. The two ends of the wire are respectively connected to the corresponding two gold fingers, and there is a gap between the end of the split strip away from the main strip and the gold fingers.

[0010] Further, the distance between the end of the split strip away from the main strip and the gold fingers is 0.4 ± 0.01 mm.

[0011] Further, the range of the ratio of the distance between the end of the split strip away from the main strip and the gold fingers to the length of the gold fingers is 0.15 - 0.16.

[0012] Further, the width of the gold fingers is 0.3 ± 0.01 mm.

[0013] Further, the ratio of the blank distance between two adjacent gold fingers to the width of the gold fingers is 2:3.

[0014] Further, the installation angle range of the plug connector in the FFC socket is ±5 degrees.

[0015] Further, the split strip is provided with a card slot for engaging with the FFC socket.

[0016] Further, the FFC cable further includes two reinforcing plates respectively fixed on the two split strips.

[0017] Further, the FFC cable further includes two grounding components both for grounding. Each grounding component includes a laser block, an aluminum foil and an absorbing material connected in sequence. The two laser blocks are respectively fixed on the two ends of the main strip, and the two absorbing materials are respectively connected to the two split strips.

[0018] The present utility model also provides a switching device, including a controller and the FFC cable as described above. The controller is provided with an FFC socket. The FFC socket is provided with a plurality of spaced contact pieces. The FFC cable is inserted into the FFC socket, and each gold finger is respectively connected to each contact piece.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] One end of the strip of the FFC flexible cable of the present utility model, which is away from the main strip, is spaced from the gold fingers. A blank design is made at the gold fingers in the FFC flexible cable, and the length of the gold fingers at the first end is appropriately shortened. Through such a design, when the plug connector is inserted into the FFC socket, the inclined contact angle between the gold fingers and the FFC socket is increased, the error tolerance rate of the plug connector being inserted obliquely and short-circuited can be improved, and the risk of short-circuiting with the FFC socket caused by the inclination of the plug connector can be reduced. Description of the Drawings

[0021] Figure 1 is a partial structural schematic diagram of a traditional FFC flexible cable;

[0022] Figure 2 is a partial structural schematic diagram of a traditional FFC flexible cable inserted into an FFC socket;

[0023] Figure 3 is a structural schematic diagram of the FFC flexible cable provided by an embodiment of the present utility model;

[0024] Figure 4 is a cross-sectional view of the FFC flexible cable provided by an embodiment of the present utility model;

[0025] Figure 5 is a partial structural schematic diagram of the FFC flexible cable provided by an embodiment of the present utility model;

[0026] Figure 6 is a partial structural schematic diagram of the FFC socket provided by an embodiment of the present utility model;

[0027] Figure 7 is a partial structural schematic diagram of the FFC flexible cable provided by an embodiment of the present utility model inserted into an FFC socket.

[0028] In the figure:

[0029] 10. FFC socket; 11. Contact piece; 20. Metal strip; 30. Baseband; 31. Main strip; 40. Plug connector; 41. Strip; 411. Card slot; 42. Gold fingers; 43. Blank; 50. Grounding component; 51. Laser block. Detailed Embodiment

[0030] Next, in combination with the drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0031] Please refer to Figures 3 to 7 As shown, an embodiment of the present utility model discloses an FFC flexible cable. The FFC flexible cable includes a baseband 30 and two plug connectors 40, and the two plug connectors 40 are respectively fixed at both ends of the baseband 30 in the length direction.

[0032] The baseband 30 includes a main band body 31 and a plurality of wires arranged at intervals, and each wire is fixed on the main band body 31; the plug connector 40 is used to be inserted into the FFC socket 10 in the controller. The plug connector 40 includes a sub-band body 41 and a plurality of gold fingers 42 all fixed on the sub-band body 41. The two sub-band bodies 41 are respectively connected to the two ends of the main band body 31 in the length direction. The two ends of the wire are respectively connected to the corresponding two gold fingers 42, and there is an interval between the end of the sub-band body 41 far away from the main band body 31 and the gold finger 42. This is equivalent to making a blank design 43 at the gold finger 42 in the FFC cable, appropriately shortening the length of the gold finger 42 at the head end, increasing the inclined contact angle between the gold finger 42 and the FFC socket 10, and being able to improve the fault tolerance rate of the plug connector 40 being inserted obliquely and short-circuited. The main band body 31 and the sub-band body 41 are both made of flexible PET plastic material.

[0033] It should be noted that the FFC socket 10 is provided with a slot, and a plurality of contact pieces 11 arranged at intervals are installed on one side of the inner wall of the slot. When the plug connector 40 is inserted into the slot of the FFC socket 10, each gold finger 42 is respectively connected corresponding to each contact piece 11, so that the controller and the FFC cable realize the function of electrical conduction. If the plug connector 40 is inclined after being installed in the FFC socket 10, as long as the gold finger 42 does not contact the adjacent contact piece 11 of its corresponding contact piece 11, a short-circuit phenomenon will not occur. Therefore, in this embodiment, a blank design 43 is made at the gold finger 42 in the FFC cable. The blank 43 does not cause a short-circuit phenomenon when contacting the adjacent contact piece 11 of its corresponding contact piece 11, increasing the inclined contact angle between the gold finger 42 and the FFC socket 10, being able to improve the fault tolerance rate of the plug connector 40 being inserted obliquely and short-circuited, and reducing the risk of short-circuiting with the FFC socket 10 caused by the inclination of the plug connector 40.

[0034] The distance L1 between the end of the sub-band body 41 far away from the main band body 31 and the gold finger 42 is 0.4 ± 0.01 mm. A blank design 43 is made at the gold finger 42 in the FFC cable, and the length of the blank 43 is L1. The length L2 of the gold finger 42 is 2.6 ± 0.01 mm. The ratio range of the distance L1 between the end of the sub-band body 41 far away from the main band body 31 and the gold finger 42 to the length L2 of a single gold finger 42 is 0.15 - 0.16. The blank 43 size at the gold finger 42 is determined by the length of the gold finger 42. The longer the length of the gold finger 42, the correspondingly larger the blank 43 size made at the gold finger 42 in the FFC cable.

[0035] In this embodiment, the sum of the width L3 of a single gold finger 42 and the blank distance L4 between two adjacent gold fingers 42 is 0.5 ± 0.01 mm. Among them, the width L3 of a single gold finger 42 is 0.3 ± 0.01 mm, and the blank distance L4 between two adjacent gold fingers 42 is 0.2 ± 0.01 mm. The blank distance L4 between two adjacent gold fingers 42 is less than the width L3 of a single gold finger 42, and the ratio of the blank distance L4 between two adjacent gold fingers 42 to the width L3 of a single gold finger 42 is 2:3. The width H1 of a single contact piece 11 in the FFC socket 10 is consistent with the width L3 of a single gold finger 42, and the blank distance H2 between two adjacent contact pieces 11 is consistent with the blank distance L4 between two adjacent gold fingers 42. The length H3 of a single contact piece 11 is greater than or equal to the sum of the length L2 of a single gold finger 42 and the length L1 of the blank space 43 at the gold finger 42, so that the FFC flexible cable can normally achieve the electrical conduction function with the FFC socket 10.

[0036] When there is no blank space 43 at the gold finger 42 of the FFC flexible cable, the installation angle range of the plug connector 40 in the FFC socket 10 is ±4 degrees. When there is a blank space 43 at the gold finger 42 of the FFC flexible cable, the installation angle β range of the plug connector 40 in the FFC socket 10 is ±5 degrees. The plug connector 40 can be inclined and installed between -5 degrees and +5 degrees relative to the FFC socket 10 without short circuit. The design of the blank space 43 of the FFC flexible cable increases the inclined contact angle by 1 degree compared with no blank space 43, and the margin is increased by 25%. Using this design of the blank space 43 can reduce the short-circuit risk caused by the FFC flexible cable being inserted obliquely.

[0037] In some embodiments, the sub-tape body 41 is provided with a card slot 411 for clamping with the FFC socket 10. The inner wall of the slot of the FFC socket 10 is provided with a corresponding card head. When the plug connector 40 is inserted into the FFC socket 10, the card head is clamped into the card slot 411, so as to effectively prevent the FFC flexible cable from becoming loose from the FFC socket 10 during operation.

[0038] The FFC flexible cable further includes two reinforcing plates, which are respectively fixed on the two sub-tape bodies 41. The reinforcing plates are arranged on the side of the sub-tape body 41 away from the gold finger 42, and are used to increase the strength of the plug connector 40, so that the plug connector 40 can be stably inserted and pulled out of the FFC socket 10. The reinforcing plates can be made of plastic, metal and silicone materials.

[0039] In this embodiment, the FFC flexible cable further includes two grounding components 50 both for grounding. The grounding component 50 includes a laser block 51, an aluminum foil and an absorbing material which are connected in sequence. The two laser blocks 51 are respectively fixed at two ends of the main strip 31. The two absorbing materials are respectively connected to the two sub-strips 41. The aluminum foil and the absorbing material are both arranged close to the front end of the reinforcing plate. The grounding component 50 can control the characteristic impedance of the FFC flexible cable and play a shielding role.

[0040] The present utility model also discloses a switching device, which includes a controller and the FFC flexible cable as described above. The controller is provided with an FFC socket 10. The FFC socket 10 is internally provided with a plurality of contact pieces 11 arranged at intervals. The FFC flexible cable is inserted into the FFC socket 10. Each gold finger 42 is respectively connected to each contact piece 11. The characteristic impedance of the FFC flexible cable is 100±10Ω, the insulation impedance ≥100M, and the operating temperature is -30°C to 105°C.

[0041] In summary, there are intervals between the end of the sub-strip 41 of the FFC flexible cable of the present utility model far from the main strip 31 and the gold finger 42, which is equivalent to making a blank design 43 at the gold finger 42 in the FFC flexible cable, and appropriately shortening the length of the gold finger 42 at the head end. Through such a design, when the plug connector 40 is inserted into the FFC socket 10, the inclined contact angle between the gold finger 42 and the FFC socket 10 is increased, the fault tolerance rate of the plug connector 40 being inserted obliquely and short-circuited can be improved, and the risk of short circuit between the plug connector 40 and the FFC socket 10 caused by the inclination of the plug connector 40 can be reduced.

[0042] The above embodiments are only the preferred embodiments of the present utility model, and the protection scope of the present utility model cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model belong to the protection scope required by the present utility model.

Claims

1. An FFC cable, characterized in that: include: A base belt, the base belt comprising a main belt body and a plurality of wires arranged at intervals, each of the wires being fixed on the main belt body; Two plug connectors are used to be inserted into the FFC socket in the controller. The plug connector includes a sub-belt body and a plurality of gold fingers fixed on the sub-belt body. The two sub-belt bodies are respectively connected to the two ends of the main belt body in the length direction. The two ends of the wire are respectively connected to the corresponding two gold fingers, and the sub-belt body is spaced apart from one end of the main belt body to the gold fingers.

2. The FFC cable according to claim 1, characterized in that: The distance between the end of the sub-belt body away from the main belt body and the gold finger is 0.4±0.01 mm.

3. The FFC cable according to claim 1, characterized in that: The ratio of the distance between the end of the sub-belt body away from the main belt body and the golden finger to the length of the golden finger is in the range of 0.15 to 0.

16.

4. The FFC cable according to claim 1, characterized in that: The width of the gold finger is 0.3±0.01 mm.

5. The FFC cable according to claim 1, characterized in that: The ratio of the blank distance between two adjacent golden fingers to the width of the golden fingers is 2:

3.

6. The FFC cable according to claim 1, characterized in that: The installation angle range of the plug connector in the FFC socket is ±5 degrees.

7. The FFC cable according to claim 1, characterized in that: The strip body is provided with a card slot for card connection with the FFC socket.

8. The FFC cable according to claim 1, characterized in that: The FFC cable also includes two reinforcement plates, and the two reinforcement plates are respectively fixed on the two strip bodies.

9. The FFC cable according to claim 1, characterized in that: The FFC cable also includes two grounding components both used for grounding. The grounding components include a laser block, aluminum foil and an absorbing material connected in sequence. The two laser blocks are respectively fixed on the two ends of the main belt body, and the two absorbing materials are respectively connected to the two branch belt bodies.

10. A switching device, characterized in that: It comprises a controller and an FFC cable as described in any one of claims 1 to 9, wherein the controller is provided with an FFC socket, wherein the FFC socket is provided with a plurality of contact sheets arranged at intervals, wherein the FFC cable is inserted into the FFC socket, and wherein each of the gold fingers is respectively connected to each of the contact sheets.

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