A clock spring for high-speed video signal transmission

Abstract

The present invention relates to the technical field of clock springs, and in particular to a clock spring for high-speed video signal transmission, comprising an annular upper cover, an annular rotor being arranged at the upper end of the upper cover, an annular base being arranged at the lower end of the upper cover, a cable assembly being arranged between the upper cover and the base, the cable assembly comprising a connector 1 fixed on the rotor, the connector 1 being defined as being located at the left end of the rotor, the cable assembly further comprising a connector 2 fixed at the right end of the base, a PCB board being arranged at the lower end of the connector 1 and an FPC connector being arranged at the upper end of the two PCB boards, an LVDS cable being arranged between the two FPC connectors; each connection point between the connector 1, the PCB board, the FPC connector and the connector 2 is provided with a plastic package; the arrangement of the cable assembly enables the clock spring to shield external electromagnetic interference while meeting the requirements of high-speed video signal transmission; and the arrangement of the plastic package at the connection point can avoid interference signals in a high-humidity environment, thereby enhancing the stability of the clock spring.

Description

Technical Field

[0001] The invention relates to the technical field of clock springs, and in particular to a clock spring used for high-speed video signal transmission. Background Art

[0002] The clock spring is an electrical signal rotary connector on the automobile airbag system. It is a circuit connection device between two relatively rotating parts. It is an important component of the automobile airbag system. Its main function is to keep the airbag, horn switch and other electronic components in the steering wheel connected to the electrical signals of the main wiring harness of the car when the steering wheel is turned.

[0003] For example, a Chinese patent application with application publication number CN115036764A discloses a clock spring for automobiles, wherein the housing of the clock spring is buckled with the end cover, the coil core is arranged on the top surface of the housing, the toggle member is located on the bottom surface of the end cover, the locking member is inserted into the housing and locks the coil core, the steering wheel end connector is arranged on the top surface of the coil core, the column end connector is arranged on the side of the end cover, and the airbag connector is inserted into the steering wheel end connector; a plurality of conductive rings are arranged on the surfaces of the steering wheel end PCB board and the column end PCB board, and are electrically connected to the steering wheel end connector and the column end connector respectively, a boss of the steering wheel end PCB board embedded in the coil core is arranged on the bottom surface of the coil core, the column end PCB board is arranged on the top surface of the end cover, a plurality of through holes are arranged on the top surface of the housing and correspond to the positions of the plurality of conductive rings, a plurality of conductive columns are arranged in the plurality of through holes and the bottom ends contact the plurality of conductive rings of the column end PCB board, and the top ends contact the plurality of conductive rings of the steering wheel end PCB board after passing through the through holes; the clock spring can prevent the phenomenon of wrong circle, disordered circle and breaking, reduce abnormal noise, and improve driving control reliability.

[0004] However, the above-mentioned clock spring has certain defects: with the continuous innovation of automobile technology, the existing steering wheel has an integrated screen design, which connects the screen to the panoramic camera outside the vehicle so that the screen can display the external image of the vehicle in real time. However, the above-mentioned clock spring cancels the flat cable setting inside the traditional clock spring, making it unable to transmit video signals, and the existing clock spring does not have the stable transmission function of high-speed video signals. Therefore, designing a clock spring with high-speed video signal transmission function meets the needs of automobile technology innovation. Summary of the invention

[0005] The invention provides a clock spring for high-speed video signal transmission, so as to solve the technical problem that the existing clock spring cannot stably transmit the high-speed video signal.

[0006] In order to solve the above problems, the present invention provides a clock spring for high-speed video signal transmission, which adopts the following technical solution:

[0007] A clock spring for high-speed video signal transmission, comprising an annular upper cover, an annular rotor rotatably mounted on the upper cover is provided at the upper end of the upper cover, an annular base is provided at the lower end of the upper cover, a cable assembly for transmitting electrical signals is provided between the upper cover and the base, the cable assembly comprises a connector 1 fixed on the rotor, the connector 1 is defined to be located at the left end of the rotor, the cable assembly further comprises a connector 2 fixed at the right end of the base, a PCB board is provided at the lower end of the connector 1 and an FPC connector is provided on the two PCB boards, and an LVDS cable for transmitting video signals is provided between the two FPC connectors;

[0008] Each connection point between the connector 1, the PCB board, the FPC connector and the connector 2 is plastic-encapsulated to prevent interference of the signal in a high humidity environment.

[0009] The beneficial effects are as follows: by arranging an LVDS cable between connector one and connector two, the clock spring can shield external electromagnetic interference while meeting the requirements of high-speed video signal transmission; in addition, the signal transmission quality and maintainability can be improved by switching between the connector and the LVDS cable through a PCB board; and by arranging a plastic package at the connection point, the service life of the connection point can be extended while avoiding high-humidity environment interfering with the signal, thereby enhancing the stability of the clock spring.

[0010] Furthermore, the FPC connector is a snap-on connector to improve the convenience of installing the LVDS cable.

[0011] The beneficial effect is that the provision of the snap-on connector can improve the connection convenience between the LVDS cable and the PCB board, while increasing the maintainability of the clock spring.

[0012] Furthermore, a pressure plate for preventing the FPC connector from loosening is provided on the PCB board, so as to enhance the connection stability between the FPC connector and the LVDS cable.

[0013] The beneficial effect is that the setting of the pressure plate can prevent the FPC connector on the PCB board from bouncing up due to external force, causing the LVDS cable to be separated from the PCB board, thereby improving the connection stability between the PCB board and the LVDS cable.

[0014] Furthermore, the pressing plate is an elastic C-shaped plate, and the left and right ends of the C-shaped plate have hooks to clamp the FPC connector by clamping the PCB board.

[0015] Furthermore, the LVDS cable includes a plurality of copper strips arranged in parallel, the surface of the copper strips has a nickel plating layer, the outer side of the nickel plating layer has a gold plating layer, and the outer side of the copper strips has a shielding film for shielding electromagnetic interference, so as to improve the signal transmission stability of the LVDS cable and increase its service life.

[0016] Furthermore, the right side of connector one has a protective cover, and the right side of connector two has a cover plate, and both the protective cover and the cover plate are fixedly connected to the corresponding connector to prevent impurities from entering the interior of the connector while playing an electromagnetic shielding role.

[0017] The beneficial effect is that the setting of the protective cover and the cover plate can prevent impurities from entering the connector, avoid the influence of dust accumulation on the signal transmission of the device, and at the same time can improve the electromagnetic shielding ability of the clock spring and enhance the quality of signal transmission.

[0018] Furthermore, an annular locking piece is rotatably mounted on the lower end of the base, a plurality of clamping plates are provided on the upper end of the annular locking piece, and a plurality of clamping blocks are provided on the inner side of the rotor corresponding to the clamping plates, so that the rotor is locked with the base through the locking piece.

[0019] Furthermore, the upper cover has a plurality of card blocks on the outer side, and the base has a plurality of card plates corresponding to each card block on the upper cover so that the upper cover and the base are fixedly connected by buckles.

[0020] Furthermore, the connector 1 and the connector 2 are both FAKRA connectors, and the connector 1 and the connector 2 are fixedly connected to the PCB board by soldering.

[0021] The beneficial effect is that the FAKRA connector has good electrical connection and mechanical connection performance, and can ensure the stable transmission of high-speed video signals.

[0022] Furthermore, the outer side of the base is provided with a plurality of fixing hooks, and the fixing hooks are used to fix the base on the steering column.

[0023] The clock spring for high-speed video signal transmission provided by the present invention has the following beneficial effects:

[0024] 1. By setting an LVDS cable between connector 1 and connector 2, the clock spring can shield external electromagnetic interference while meeting the requirements of high-speed video signal transmission; in addition, the signal transmission quality and maintainability can be improved by switching between the connector and the LVDS cable through a PCB board; and plastic packaging is provided at the connection point to extend the service life of the connection point while avoiding interference of the signal in a high-humidity environment, thereby enhancing the stability of the clock spring.

[0025] 2. Setting a snap-on connector can improve the connection convenience between the LVDS cable and the PCB board, while increasing the maintainability of the clock spring.

[0026] 3. The setting of the pressure plate can prevent the FPC connector on the PCB from bouncing up due to external force, causing the LVDS cable to be separated from the PCB, thereby improving the connection stability between the PCB and the LVDS cable.

[0027] 4. The setting of the protective cover and cover plate can prevent impurities from entering the connector, avoid the signal transmission of the device affected by dust accumulation, and at the same time improve the electromagnetic shielding capability of the clock spring and enhance the quality of signal transmission.

[0028] 5. FAKRA connector has good electrical and mechanical connection performance, which can ensure the stable transmission of high-speed video signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0030] Figure 1 A schematic structural diagram of a clock spring for high-speed video signal transmission provided by the present invention;

[0031] Figure 2 for Figure 1 A schematic diagram of the structure of the cable assembly shown;

[0032] Figure 3 for Figure 2 The structural schematic diagram of the pressing plate shown;

[0033] Figure 4 for Figure 2 A schematic diagram of the structure of the PCB assembly shown;

[0034] Figure 5 for Figure 2 The structural diagram of the LVDS cable shown;

[0035] Figure 6 for Figure 5 A local enlarged schematic diagram of the middle A;

[0036] Figure 7 for Figure 1 Schematic diagram of the cooperation between the middle protective cover and the connector 1;

[0037] Figure 8 for Figure 1 Schematic diagram of the matching between the middle cover and connector 2.

[0038] Description of reference numerals:

[0039] 1. Upper cover; 11. Card block; 2. Rotor; 3. Cable assembly; 31. Connector 1; 32. PCB assembly; 321. PCB board; 322. FPC connector; 323. Press plate; 324. Hook; 33. LVDS cable; 331. Copper tape; 332. Nickel plating; 333. Gold plating; 334. Shielding film; 4. Base; 41. Card board; 42. Fixing hook; 5. Ring locking piece; 6. Cover plate; 7. Protective cover; 8. Connector 2. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0041] The main idea of ​​the present invention is to set an LVDS cable 33 between connector 1 31 and connector 2 8 so that the clock spring can shield external electromagnetic interference while meeting the requirements of high-speed video signal transmission; in addition, the signal transmission quality and maintainability can be improved by switching between the connector and the LVDS cable 33 through a PCB board 321; and plastic packaging is set on the connection point to extend the service life of the connection point while avoiding high-humidity environment interfering with the signal, thereby enhancing the stability of the clock spring.

[0042] After introducing the basic principle of the present invention, various non-limiting embodiments of the present invention are described in detail below. The number of any element in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0043] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0044] Embodiment 1 of a clock spring for high-speed video signal transmission provided by the present invention:

[0045] like Figures 1 to 8 As shown, the clock spring includes an annular upper cover 1, the upper end of the upper cover 1 has a rotatably mounted annular rotor 2, and the rotor 2 is fixedly connected to the steering wheel; the lower end of the upper cover 1 has an annular base 4, and the base 4 is fixedly connected to the steering column; a cable assembly 3 for transmitting electrical signals is also provided between the upper cover 1 and the base 4.

[0046] The following first introduces the cable assembly 3, which includes a connector 31 fixed on the rotor 2. Figure 1As shown, connector 1 31 is located at the left end of the rotor 2, and the cable assembly 3 also includes connector 2 8 fixed at the right end of the base 4. Both connector 1 31 and connector 2 8 are FAKRA connectors. The right side of connector 1 31 has a protective cover 7, and the right side of connector 2 8 has a cover plate 6. The protective cover 7 and the cover plate 6 are fixedly connected to the corresponding connector to prevent impurities from entering the interior of the connector while playing an electromagnetic shielding role; the lower end of connector 1 31 and the upper end of connector 2 8 both have PCB assemblies 32, and an LVDS cable 33 for transmitting high-speed video signals is provided between the two PCB assemblies 32.

[0047] The PCB assembly 32 includes a rectangular PCB board 321, and the connector 1 31 and the connector 2 8 are fixedly connected to the two PCB boards 321 by soldering; the two PCB boards 321 are each provided with an FPC connector 322, which is a snap-on connector to improve the convenience of installing the LVDS cable 33; each connection point between the connector 1 31, the PCB board 321, the FPC connector 322 and the connector 2 8 is plastic-encapsulated to avoid interference of the signal in a high humidity environment; the two PCB boards 321 are also provided with a pressing plate 323 for preventing the FPC connector 322 from loosening, the pressing plate 323 is an elastic C-shaped plate, and both ends of the pressing plate 323 have hooks 324 to clamp the FPC connector 322 by clamping the PCB board 321, thereby preventing the FPC connector 322 on the PCB board 321 from being ejected due to external force, causing the LVDS cable 33 to be separated from the PCB board 321, thereby improving the connection stability between the PCB board 321 and the LVDS cable 33.

[0048] The LVDS cable 33 includes a plurality of copper strips 331 arranged in parallel, the surface of the copper strips 331 has a nickel-plated layer 332, the outer side of the nickel-plated layer 332 has a gold-plated layer 333, and the outer side of the copper strips 331 has a shielding film 334 for shielding electromagnetic interference, so as to improve the signal transmission stability of the LVDS cable 33 and improve its service life.

[0049] In addition, the outer side of the upper cover 1 has a plurality of card blocks 11, and the base 4 has a plurality of card plates 41 corresponding to each card block 11 of the upper cover 1, so that the upper cover 1 and the base 4 are fixedly connected by snap buckles, thereby improving the convenience of installation; the outer side of the base 4 is also provided with a plurality of downwardly facing fixing hooks 42, and the fixing hooks 42 are used to fix the base 4 on the steering column; an annular locking member 5 is rotatably installed on the inner side of the lower end of the base 4, and a plurality of card plates 41 extending upward are provided on the upper end of the annular locking member 5, and a plurality of card blocks 11 are provided on the inner side of the rotor 2 corresponding to the card plates 41, and the card plates 41 cooperate with the card blocks 11 to lock the rotor 2 with the base 4 through the locking member.

[0050] The working principle of the clock spring is as follows: the screen on the steering wheel and the camera outside the car are electrically connected through the cable assembly 3, wherein the PCB assembly 32 can improve the signal transmission quality and the convenience of fixing the LVDS cable 33, and the pressure plate 323 can prevent the connector from loosening; the low-voltage differential signal transmission characteristics of the LVDS cable 33 can reduce external electromagnetic interference, and the use of plastic packaging for the connection points can prevent the interference of high humidity environment on the signal, thereby ensuring the video transmission rate while ensuring the transmission quality of the video signal.

[0051] Embodiment 2 of a clock spring for high-speed video signal transmission provided by the present invention:

[0052] The main difference between it and Example 1 is:

[0053] In Example 1, the upper cover and the base are fixed by buckles.

[0054] In this embodiment, the upper cover and the base are fixed by screws.

[0055] Embodiment 3 of a clock spring for high-speed video signal transmission provided by the present invention:

[0056] The main difference between it and Example 1 is:

[0057] In Example 1, the FPC connector is pressed onto the PCB board by a C-shaped plate.

[0058] In this embodiment, the FPC connector is fixed to the PCB board by screws.

[0059] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and the like, which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0060] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A clock spring for high-speed video signal transmission, comprising an annular upper cover, an annular rotor rotatably mounted on the upper cover is provided at the upper end of the upper cover, an annular base is provided at the lower end of the upper cover, and a cable assembly for transmitting electrical signals is provided between the upper cover and the base, characterized in that: The cable assembly includes a connector 1 fixed on the rotor, and the connector 1 is defined to be located at the left end of the rotor. The cable assembly also includes a connector 2 fixed at the right end of the base. The lower end of the connector 1 and the upper end of the connector 2 both have PCB boards, and both PCB boards are provided with FPC connectors. An LVDS cable for transmitting video signals is provided between the two FPC connectors. Each connection point between the connector 1, the PCB board, the FPC connector and the connector 2 is plastic-encapsulated to prevent interference of the signal in a high humidity environment.

2. A clock spring for high-speed video signal transmission according to claim 1, characterized in that: The FPC connector is a snap-on connector to improve the convenience of installing the LVDS cable.

3. A clock spring for high-speed video signal transmission according to claim 2, characterized in that: The PCB board is provided with a pressure plate for preventing the FPC connector from being loosened, so as to enhance the connection stability between the FPC connector and the LVDS cable.

4. A clock spring for high-speed video signal transmission according to claim 3, characterized in that: The pressing plate is an elastic C-shaped plate, and the left and right ends of the C-shaped plate are provided with hooks to clamp the FPC connector by clamping the PCB board.

5. A clock spring for high-speed video signal transmission according to claim 4, characterized in that: The LVDS cable comprises a plurality of copper strips arranged in parallel, the surface of the copper strips has a nickel-plated layer, the outer side of the nickel-plated layer has a gold-plated layer, and the outer side of the copper strips has a shielding film for shielding electromagnetic interference, so as to improve the signal transmission stability of the LVDS cable and increase its service life.

6. A clock spring for high-speed video signal transmission according to claim 5, characterized in that: The connector one has a protective cover on the right side, and the connector two has a cover plate on the right side. Both the protective cover and the cover plate are fixedly connected to the corresponding connector to prevent impurities from entering the interior of the connector while playing an electromagnetic shielding role.

7. A clock spring for high-speed video signal transmission according to claim 6, characterized in that: An annular locking piece is rotatably mounted on the lower end of the base, and a plurality of clamping plates are provided on the upper end of the annular locking piece. A plurality of clamping blocks are provided on the inner side of the rotor corresponding to the clamping plates, so that the rotor is locked with the base through the locking piece.

8. A clock spring for high-speed video signal transmission according to claim 7, characterized in that: The upper cover is provided with a plurality of card blocks on the outer side, and the base is provided with a plurality of card plates corresponding to each card block on the upper cover so that the upper cover and the base are fixedly connected by buckles.

9. A clock spring for high-speed video signal transmission according to claim 8, characterized in that: The connector 1 and the connector 2 are both FAKRA connectors, and the connector 1 and the connector 2 are fixedly connected to the PCB board by soldering.

10. A clock spring for high-speed video signal transmission according to claim 9, characterized in that: The outer side of the base is provided with a plurality of fixing hooks, and the fixing hooks are used for fixing the base on the steering column.

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