Plastic-electricity integrated touch control interior ceiling lamp control panel for automobile and manufacturing method of plastic-electricity integrated touch control interior ceiling lamp control panel

Abstract

The invention relates to a plastic-electricity integrated touch control interior ceiling lamp control panel for an automobile, a manufacturing method, an illumination control module and a touch control panel, the touch control panel comprises a decorative membrane, a light guide column, an injection molding shell, an FPC flexible circuit board and side light emitting lamp beads, the decorative membrane and the FPC flexible circuit board are formed in the injection molding shell in a plastic-electricity integrated injection molding mode, and the side light emitting lamp beads are arranged on the side light emitting lamp beads. The decorative membrane is located on the upper surface of the injection molding shell, the FPC is embedded into the injection molding shell, and side light-emitting lamp beads are arranged on the FPC and guide lamplight to the position of a semi-transparent character window of the decorative membrane through a light guide column which is arranged in the injection molding shell in an injection molding mode. The touch control switch has the advantages that the integrated injection molding structure integrates the LED light source and a circuit system, the waterproof and wear-resistant effects are achieved, the service life of more than 500,000 times of operation is achieved, and the technical bottlenecks of a traditional touch control switch in sensitivity, durability, waterproofness and product integration are systematically solved while the automobile gauge level reliability is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of in-vehicle lighting, and particularly relates to a plastic-electricity integrated touch control interior roof lamp control panel for vehicles and a manufacturing method. BACKGROUND

[0002] In the prior art, the in-vehicle lighting control system mainly relies on traditional mechanical switches. The existing control switches have the following problems: 1. First, the sensitivity and response speed of mechanical switches are not as good as those of electronic touch control switches, which limits the user experience. 2. The durability of mechanical switches is also a consideration, as they can wear out or break after long-term use. 3. The waterproof performance of mechanical switches is usually poor, and they are easily affected by moisture, which affects their normal work. 4. The existing in-vehicle lighting control system has deficiencies in integration, and it is often difficult to seamlessly integrate with other electronic systems of the vehicle (such as seat adjustment systems, etc.), thereby limiting the realization of intelligent and automated functions. SUMMARY

[0003] In view of the above problems, the purpose of the present application is to provide a plastic-electricity integrated touch control interior roof lamp control panel for vehicles and a manufacturing method, which solves the above problems of the prior art by using advanced touch control technology, electronic control technology and integrated design.

[0004] The plastic-electricity integrated touch control interior roof lamp control panel for vehicles provided by the present application comprises: a lighting control module connected with an interior roof lamp, and a control switch connected with the lighting control module through a wired connection, wherein the control switch is a touch panel, the touch panel is connected with the panel control module through a wire, the panel control module is connected with the lighting control module through a wire, the panel control module is used for receiving a touch signal of the touch panel and converting the touch signal into a switch signal recognized by the lighting control module, and the lighting control module controls the interior roof lamp according to the switch signal.

[0005] The touch panel comprises a decorative film, a light guide column, an injection molding shell, an FPC flexible circuit board, and a side light-emitting lamp bead, the decorative film and the FPC flexible circuit board are integrally injection molded in the injection molding shell, the decorative film is located on the upper surface of the injection molding shell, the FPC flexible circuit board is embedded in the interior of the injection molding shell, the FPC flexible circuit board is provided with the side light-emitting lamp bead, and the side light-emitting lamp bead guides the light to the semi-transparent character window position of the decorative film through the light guide column injection molded in the injection molding shell.

[0006] As a preferred embodiment of the present application, the thickness of the FPC flexible circuit board is 0.3 mm.

[0007] The second object of the present application is to provide a manufacturing method of a plastic-electricity integrated touch control interior roof lamp control panel for vehicles, comprising the following steps:

[0008] Step S1: circuit board design, the circuit board adopts FPC flexible circuit board, the FPC flexible circuit board adopts surface mount SMT to carry out PC diaphragm circuit SMT,

[0009] Step S2: plastic-electricity integration forming, including: high-pressure forming and in-mold injection.

[0010] As a preferred embodiment of the application, the following steps are further included in step S1:

[0011] Step S11: lay the FPC on a special jig or vacuum suction platform, manually align the thin steel mesh, and use a small scraper to uniformly scrape the solder paste in one direction to avoid leakage or deviation caused by multiple scraping and pressing;

[0012] Step S12: under the operation of the SMT machine, use vacuum tweezers to accurately pick up the micro components and install them one by one on the corresponding pads of the FPC to prevent the substrate from warping;

[0013] Step S13: after the installation is completed, welding is performed through a reflow soldering furnace, the peak temperature is controlled at 230-245 DEG C, and a flexible carrier is used to support the FPC through the furnace;

[0014] Step S14: finally, manually inspect the solder joint fullness and the integrity of the substrate to ensure that there is no false welding, deviation or damage to the flexible layer.

[0015] As a preferred embodiment of the application, the following steps are further included in step S2:

[0016] Step S21: high-pressure forming,

[0017] Step S211: place the FPC flexible circuit board printed in step S1 into a high-pressure forming mold, and use high-pressure gas to form the plate;

[0018] Step S212: place the side light-emitting lamp beads and the light guide column into the mold cavity, wherein the two side light-emitting lamp beads are installed on the PC flexible circuit board, and the light guide column is arranged between the two side light-emitting lamp beads;

[0019] Step S213: supplement the material by internal pressurization and axial force on the high-pressure forming mold, press the pipe blank into the mold cavity to make it form the injection molding shell, wherein the position of the axis of the injection molding shell is a curve, the pipe blank is first pre-bent to approximate the shape of the part, and then pressure forming is performed.

[0020] As a preferred embodiment of the application, the following steps are further included in step S2:

[0021] Step S22: in-mold injection,

[0022] Step S221: Put the FPC flexible circuit film with preset electronic components into the injection mold, combine the plastic base material of the injection shell with the preset film pattern through high temperature and high pressure, and form a decorative film piece with the decorative pattern integrated with the plastic base material.

[0023] Step S22: Pre-set display characters in the film pattern on the decorative film piece, the position with the display characters is a semi-transparent character window, and the light guide surface position of the light guide column corresponds to the position of the semi-transparent character window.

[0024] A third object of the present application is to provide a plastic-electric integrated touch control interior roof lamp for a vehicle, comprising: an interior roof lamp mounted on a vehicle interior roof, a lighting control module connected with the interior roof lamp, a control unit connected with the lighting control module, and a touch panel connected with the control unit, the touch panel is mounted on the vehicle interior roof through a fixing seat, and the touch panel and the control unit are covered with a waterproof film layer.

[0025] The lighting control module is used for receiving signals of the control unit and controlling the on-off of the vehicle interior roof lamp.

[0026] The control unit is used for detecting the electrical property change of the touch panel and generating a control signal.

[0027] The touch panel uses the touch panel in claim 1 or 2.

[0028] The beneficial effects of the present application are as follows:

[0029] 1. The present application changes the traditional exterior structure, has higher flexibility and product expandability, conforms to the lightweight trend, the overall thickness of the FPC circuit board is 0.3mm, the weight can be reduced by 75%-85%, and the touch switch demand of complex shape and structure can be met.

[0030] 2. The present application adopts SMT patch technology to ensure high precision and high efficiency of component mounting.

[0031] 3. The present application adopts high-pressure forming and film injection molding, so that the FPC circuit board, the decorative film piece and the injection shell are integrally formed, which has the advantages of reducing product weight and volume, being suitable for portable devices, providing design flexibility, allowing more complex shapes and structures, strong product durability and waterproof performance, providing additional protection of plastic material, simplifying the manufacturing process, reducing cost, improving production efficiency, etc. BRIEF DESCRIPTION OF DRAWINGS

[0032] Other objects and results of the present application will be more apparent and easy to understand by referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present application. In the drawings:

[0033] Fig. 1 It is a schematic diagram of the overall process in the present embodiment.

[0034] Fig. 2 It is an exploded view of the touch panel structure in the present embodiment.

[0035] Fig. 3 It is a schematic diagram of the FPC flexible circuit board in the present embodiment.

[0036] Reference signs: decorative film sheet 1, light guide column 2, injection molded shell 3, FPC flexible circuit board 4, side light emitting lamp bead 5, semi-transparent character window 6. DETAILED DESCRIPTION

[0037] Embodiment 1

[0038] Referring to Figs. 1-3 The present embodiment provides a plastic-electricity integrated touch control interior roof lamp control panel for automobiles, which comprises: an illumination control module connected with the interior roof lamp, a control switch connected with the illumination control module through a wire, the control switch being a touch panel, the touch panel being connected with the panel control module through a wire, the panel control module being connected with the illumination control module through a wire, the panel control module being used for receiving the touch signal of the touch panel and converting the touch signal into a switch signal recognized by the illumination control module, and the illumination control module being used for controlling the interior roof lamp according to the switch signal.

[0039] The touch panel comprises: a decorative film sheet 1, a light guide column 2, an injection molded shell 3, an FPC flexible circuit board 4, and two side light emitting lamp beads 5, the decorative film sheet 1 and the FPC flexible circuit board 4 are integrally injection molded in the injection molded shell 3, the decorative film sheet 1 is located on the upper surface of the injection molded shell 1, the FPC flexible circuit board 4 is embedded in the injection molded shell 3, two side light emitting lamp beads 5 are arranged on the FPC flexible circuit board 4, and the side light emitting lamp beads 5 guide the light to the position of the semi-transparent character window 6 of the decorative film sheet 1 through the light guide column 2 injection molded in the injection molded shell 3. The thickness of the FPC flexible circuit board 4 is 0.3 mm.

[0040] Working principle: when a user touches the touch panel, the electrical property of the touch panel changes, the panel control module detects the change and generates a corresponding control signal, and the illumination control module receives the control signal and controls the switch of the interior roof lamp in the vehicle.

[0041] Embodiment 2

[0042] The present embodiment provides a manufacturing method of a plastic-electricity integrated touch control interior roof lamp control panel for automobiles, which comprises the following steps:

[0043] Step S1: circuit board design, the circuit board adopts an FPC flexible circuit board 4, the FPC flexible circuit board 4 adopts surface mount SMT for PC film sheet circuit patching, to ensure high-precision and high-efficiency component mounting,

[0044] Step S11: Lay the FPC on a special jig or vacuum suction platform, manually align the thin steel mesh (usually 0.08-0.12mm thick), and use a small scraper to uniformly scrape the solder paste in one direction with uniform force to avoid leakage or deviation caused by multiple scraping pressures;

[0045] Step S12: Under the operation of the chip mounter (with microscope assistance), use vacuum tweezers to accurately pick up micro components (such as 0402 package), and install them one by one on the corresponding pads of the FPC. The direction and pressure of the components must be strictly controlled to prevent the substrate from warping.

[0046] Step S13: After completion of the installation, perform welding through a reflow soldering furnace, with peak temperature controlled at 230-245℃, and use a flexible carrier to support the FPC during the process.

[0047] Step S14: Finally, manually inspect the solder joint fullness and substrate integrity to ensure that there is no false welding, deviation, or damage to the flexible layer.

[0048] Step S2: Plastic-electricity integrated molding, including: high-pressure molding and in-mold injection.

[0049] Step S21: High-pressure molding,

[0050] Step S211: Place the printed FPC flexible circuit board 4 in the high-pressure molding mold, and use high-pressure gas to form the board;

[0051] Step S212: Place the side-emitting lamp beads 5 and the light guide column 2 into the mold cavity, wherein the two side-emitting lamp beads 5 are installed on the PC flexible circuit board 4, and the light guide column 2 is arranged between the two side-emitting lamp beads 5;

[0052] Step S213: Press the pipe blank into the mold cavity by internal pressurization and axial force compensation on the high-pressure molding mold to make it form the injection-molded shell, wherein the position of the curved axis in the injection-molded shell is first pre-bent to approximate the shape of the part, and then pressure forming is performed.

[0053] Step S22: In-mold injection,

[0054] Step S221: Place the FPC flexible circuit film with pre-installed electronic components into the injection mold, and combine the plastic substrate of the injection-molded shell 3 with the pre-installed film pattern through high temperature and high pressure to form a decorative film sheet 1 with the decorative pattern integrally formed with the plastic substrate.

[0055] Step S22: Pre-set display characters in the film pattern on the decorative film sheet 1, and the position with display characters is a semi-transparent character window 6. The light guide surface position of the light guide column corresponds to the position of the semi-transparent character window.

[0056] Example 3

[0057] The embodiment provides a plastic and electric integrated touch inner roof light for an automobile, which comprises an inner roof light installed on an inner roof of a vehicle, a lighting control module connected with the inner roof light, a control unit connected with the lighting control module, and a touch panel connected with the control unit, the touch panel is installed on the inner roof of the vehicle through a fixing seat, and the touch panel and the control unit are covered with a waterproof film layer.

[0058] The lighting control module is used for receiving a signal of the control unit and controlling the on-off of the inner roof light of the vehicle.

[0059] The control unit (panel control module) is used for detecting the change of the electrical property of the touch panel and generating a control signal.

[0060] The touch panel uses the touch panel in claim 1 or 2.

[0061] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A plastic-electric integrated touch-sensitive interior ceiling light control panel for automobiles, comprising: a lighting control module connected to the interior ceiling light, and a control switch connected to the lighting control module via a wire, wherein the control switch is a touch panel, the touch panel is connected to the panel control module via a wire, the panel control module is connected to the lighting control module via a wire, the panel control module is used to receive a touch signal from the touch panel and convert the touch signal into a switch signal recognized by the lighting control module, and the lighting control module controls the interior ceiling light according to the switch signal; Among them, the touch panel includes: a decorative film, a light guide column, an injection-molded shell, an FPC flexible circuit board, and side-emitting lamp beads. The decorative film and the FPC flexible circuit board are plastic-electrically integrated and injection-molded in the injection-molded shell. The decorative film is located on the upper surface of the injection-molded shell. The FPC flexible circuit board is embedded in the injection-molded shell. Side-emitting lamp beads are arranged on the FPC flexible circuit board. The side-emitting lamp beads guide light to the semi-transparent character window position of the decorative film through the light guide column injected in the injection-molded shell.

2. The automotive plastic-electric integrated touch-sensitive interior ceiling light control panel according to claim 1, characterized in that: The thickness of the FPC flexible circuit board is 0.3 mm.

3. The method for manufacturing a plastic-electric integrated touch-sensitive interior ceiling light control panel for an automobile according to claim 1, characterized in that: The following steps are involved: Step S1: Circuit board design, the circuit board uses FPC flexible circuit board, and the FPC flexible circuit board uses surface mount SMT to perform PC film circuit patch, Step S2: Plastic-electric integrated molding, including high-pressure molding and in-mold injection molding.

4. The method for manufacturing a plastic-electric integrated touch-sensitive interior ceiling light control panel for an automobile according to claim 3, characterized in that: Step S1 also includes the following steps: Step S11: Lay the FPC flat on a special jig or vacuum adsorption platform, manually align the thin steel mesh, and use a small scraper to scrape the solder paste in a uniform and unidirectional manner to avoid leakage or deviation caused by repeated scraping and pressing; Step S12: Under the operation of the placement machine, use vacuum tweezers to accurately pick up micro components and place them one by one on the corresponding pads of the FPC to prevent the substrate from warping; Step S13: After the placement is completed, the FPC is soldered in a reflow oven with the peak temperature controlled at 230-245°C, and a flexible carrier is used to support the FPC through the oven; Step S14: Finally, manually visually inspect the fullness of the solder joints and the integrity of the substrate to ensure that there are no cold solder joints, offsets, or damage to the flexible layer.

5. The method for manufacturing a plastic-electric integrated touch-sensitive interior ceiling light control panel for an automobile according to claim 3, characterized in that: Step S2 also includes the following steps: Step S21: high pressure forming, Step S211: placing the FPC printed in step S1 into a high-pressure forming mold and forming the board using high-pressure gas; Step S212: placing the side-emitting lamp beads and the light guide column into the mold cavity, wherein the two side-emitting lamp beads are mounted on the PC flexible circuit board, and the light guide column is arranged between the two side-emitting lamp beads; Step S213: The tube blank is pressed into the mold cavity by applying internal pressure and axial force on the high-pressure forming mold to form an injection-molded shell, wherein the central axis of the injection-molded shell is a curved position. The tube blank is first pre-bent into a shape close to the part, and then pressurized to form.

6. The method for manufacturing a plastic-electric integrated touch-sensitive interior ceiling light control panel for automobile according to claim 3, characterized in that: Step S2 also includes the following steps: Step S22: In-mold injection molding, Step S221: placing the FPC flexible circuit film with the preset electronic components attached into an injection mold, and combining the plastic substrate of the injection-molded housing with the preset film pattern through high temperature and high pressure to form a decorative film with the decorative pattern and the plastic substrate integrally formed; Step S22: presetting display characters in the film pattern on the decorative film, the position with the display characters is the semi-transparent character window, and the position of the light guide surface of the light guide column is matched with the position of the semi-transparent character window.

7. A touch-controlled interior ceiling light with integrated plastic and electricity for automobiles, characterized in that: include: An interior dome light mounted on the vehicle interior ceiling, a lighting control module connected to the interior dome light, a control unit connected to the lighting control module, and a touch panel connected to the control unit, the touch panel being mounted on the vehicle interior ceiling via a fixing base, the touch panel and the control unit being covered with a waterproof film layer; The lighting control module is used to receive signals from the control unit and control the switching of the ceiling light in the vehicle; The control unit is used to detect changes in the electrical properties of the touch panel and generate a control signal; The touch panel uses the touch panel according to claim 1 or 2.

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