Aircraft cargo hold lamp and manufacturing process thereof

Abstract

The invention belongs to the technical field of aircraft cargo hold lamps, and particularly provides an aircraft cargo hold lamp which comprises a front cover, and a frosted quartz glass screen is bonded to the upper end of the front cover through a prefabricated polyacrylic acid rubber mat; the LED assembly is arranged at the lower end of the front cover, and the LED assembly comprises a front panel and a plurality of LED chips; the driving assembly is arranged on the back face of the LED assembly, the driving assembly comprises a driving plate and a plurality of components, and the driving assembly is electrically connected with the LED assembly; the rear cover is provided with a cavity used for containing the driving assembly, one side of the rear cover is provided with an electric connector, the electric connector is electrically connected with the driving assembly, and the problems that an existing airplane cargo hold lamp is complex in structure and process, high in failure rate, high in maintenance cost and the like are solved.

Description

Technical Field

[0001] This invention relates to the field of aircraft cargo hold lighting technology, specifically to an aircraft cargo hold light and its manufacturing process. Background Technology

[0002] Currently, cargo hold lights used in civil aircraft have complex structures and manufacturing processes, resulting in high costs. Furthermore, the failure rates of the front panels made of PMMA, PC, and other plastic materials remain high. According to incomplete statistics, a single airline needs to repair and replace hundreds of cargo hold lights annually, leading to high maintenance costs. Therefore, there is a need to design and manufacture a low-cost, simple-structured, and highly reliable aircraft cargo hold light. Summary of the Invention

[0003] 1. The technical problem that the invention aims to solve: This invention provides an aircraft cargo hold light and its manufacturing process to solve the technical problems existing in the background art.

[0004] 2. Technical Solution: To achieve the above objectives, the technical solution of the present invention is as follows: An aircraft cargo hold light, including The front cover has a frosted quartz glass screen bonded to its upper end by a pre-formed polyacrylic adhesive pad. An LED assembly is disposed at the lower end of the front cover. The LED assembly includes a front panel and a plurality of LED chips disposed on the front panel. A driving component is disposed on the back of the LED component. The driving component includes a driving board and a plurality of driving components disposed on the driving board. The driving component is electrically connected to the LED component. The rear cover has a cavity at its top for accommodating the drive assembly, and an electrical connector is provided on one side of the rear cover, which is electrically connected to the drive assembly.

[0005] A further improvement is that the driver component and the LED component are placed back to back, so that their mounting holes, wire bonding holes, and vent holes correspond one-to-one.

[0006] A further improvement is that the pre-formed polyacrylic pad is sized to fit the quartz glass screen.

[0007] A further improvement is that the front cover is made of aluminum alloy, and the light-emitting hole formed by the front cover is larger than the coverage area of ​​the LED chip on the front panel.

[0008] A further improvement is that the front panel is made of a metal-based printed circuit board (MCPCB) and the entire panel is copper-plated, with the front panel mounting surface in close contact with the driver board mounting surface.

[0009] A further improvement is that the drive board is made of metal-based printed circuit board (MCPCB), and the positions of the solder holes on the drive board correspond one-to-one with the positions of the solder holes on the front panel. The drive board and the front panel are fixed to the front cover by screws.

[0010] A further improvement is that the back cover is made of aluminum alloy, and the mounting surface of the back cover contacts the mounting surface of the front panel. The back cover and the front panel are fixed to the front cover by screws.

[0011] The electrical connector is a snap-fit ​​type and is installed in the mounting hole of the rear cover.

[0012] The present invention also provides a manufacturing process for aircraft cargo hold lights, comprising the following steps: S1: Manufacturing LED components Step S11: Apply solder paste to the front panel using a solder paste template; Step S12: Place the LED chip on the front panel and solder it by reflow soldering; Step S13: Inspect the welding quality using the naked eye and XRAY equipment until it passes the inspection; S2: Create driver components Step S21: Apply solder paste to the driver board using a solder paste template; Step S22: Place the driving components on the front panel and perform reflow soldering; Step S23: Inspect the welding quality using the naked eye and XRAY equipment until it passes the inspection; S3: Overall Assembly Step S31: Place the driver component and the LED component back to back, so that their mounting holes, wire bonding holes, and vent holes correspond one to one. Step S32: Place the front cover on the LED assembly, ensuring that its mounting thread holes correspond one-to-one with the mounting holes on the LED assembly; Step S33: Install the driver assembly, LED assembly and front cover with screws, and solder wires through the wire bonding holes; Step S34: Install the electrical connector on the back cover and make wiring connections with the drive assembly; Step S35: Place the mounting surface of the back cover into contact with the mounting surface of the front panel, so that the mounting holes of the back cover correspond one-to-one with the mounting holes of the front panel, and use screws to install and fix it. S4: Capping Step S41: Sandblast the quartz glass screen; Step S42: Attach the quartz glass screen to the front cover using a pre-formed polyacrylic adhesive pad.

[0013] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this invention has the following advantages: The aircraft cargo light provided by this invention uses frosted quartz glass as the light-diffusing material, which is more reliable than light-diffusing materials such as PMMA and PC, and will not burn out due to overheating caused by prolonged contact with LED chips. The front panel is made of metal-based printed circuit board (MCPCB) and the entire panel is copper-plated to improve heat dissipation. The front panel can serve as a heat sink for LED chips and as a mounting interface for the product, saving the number of product parts and reducing costs. Without a separate heat sink, the driver component can be placed back-to-back with the LED component, which can effectively dissipate heat by utilizing the large front panel of the LED component. The LED components and driver components are placed back to back, and the rear and front covers are installed with screws. The three parts are stacked together, which simplifies the product structure and saves product costs. The soldering holes of the LED components and the driver components correspond one-to-one. During the soldering process, the wires are connected to the LED components and the driver components without bending, simplifying the internal wiring of the product. Attached Figure Description

[0014] Figure 1 A schematic diagram of the aircraft cargo hold light structure provided by the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the split state structure; Figure 3 This is a schematic diagram of the front cover structure of the present invention; Figure 4 This is a schematic diagram showing the distribution relationship between the front panel and the LED chips of the present invention; Figure 5 This is a schematic diagram of the front panel structure of the present invention; Figure 6 This is a schematic diagram showing the distribution relationship between the driver board and the driver components of this invention; Figure 7 This is a schematic diagram of the drive board structure of the present invention; Figure 8 This is a schematic diagram of the back cover structure of the present invention. Detailed Implementation

[0015] To facilitate understanding of the present invention, a more complete description of the invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough and complete.

[0016] In this invention, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0017] It should be noted that structures not described in this invention do not involve the design points and improvement directions of this invention and all adopt existing technologies. In addition, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other. Example 1

[0018] This embodiment provides an aircraft cargo cabin light, including a front cover 3, on which a frosted quartz glass screen 1 is bonded by a pre-formed polyacrylic pad 2 at its upper end; LED component 4 is disposed at the lower end of front cover 3. The LED component 4 includes front panel 41 and a plurality of white LED chips 42 disposed on front panel 41. A driving component 5 is disposed on the back of the LED component 4. The driving component 5 includes a driving board 51 and driving components 52 disposed on the driving board 51. The driving component 5 is electrically connected to the LED component 4. The rear cover 7 has a cavity at its top for accommodating the drive assembly 5. An electrical connector 8 is provided on one side of the rear cover 7, and the electrical connector 8 is electrically connected to the drive assembly 5.

[0019] Among them, the quartz glass screen 1 is sandblasted to a frosted state, and uses frosted quartz glass as a light-diffusing material. Compared with light-diffusing materials such as PMMA and PC, it has higher reliability and will not burn out due to overheating caused by prolonged contact with LED chips.

[0020] In a preferred embodiment, the pre-formed polyacrylic pad 2 is sized to fit the quartz glass screen 1.

[0021] In a preferred embodiment, the front cover 3 is made of aluminum alloy and includes a glass screen mounting groove 31, mounting threaded holes (33, 34, 35, 36, 37), a light-emitting hole 32, and a front cover mounting surface 38. The depth and size of the glass screen mounting groove 31 match the quartz glass screen 1. The light-emitting hole 32 needs to be larger than the coverage area of ​​the LED chip 42 on the front panel. The positions of the mounting threaded holes (33, 35, 37) correspond one-to-one with the through holes (73, 74, 75) of the rear cover 7 and the mounting through holes (412, 416, 4111) of the front panel 41. The mounting threaded holes (34, 36) correspond one-to-one with the through holes (512, 516) on the drive board 5 and the mounting through holes (414, 4110) on the front panel 41.

[0022] In a preferred embodiment, the LED chip 42 is a white surface-mount LED chip.

[0023] In a preferred embodiment, the front panel 41 is a metal-based printed circuit board (MCPCB), and the entire panel is copper-plated to improve heat dissipation efficiency. The front panel 41 includes LED chip pads 411, mounting countersunk holes (413, 417, 4112), mounting through holes (412, 414, 416, 4110, 4111), wire bonding holes (415, 419), vent holes 418, and a front panel mounting surface 4113; the mounting countersunk holes (413, 417, 4112) are the product mounting interfaces, and the wire bonding holes (415, 419) on the front panel are insulated; the wire bonding holes (415, 419) on the front panel correspond one-to-one with the wire bonding holes (513, 515) on the driver board.

[0024] The front panel mounting surface 4113 is in close contact with the driver board mounting surface 517.

[0025] The front panel 41 is made of MCPCB, which can serve as a heat sink for LED chips and as a mounting interface for the product, saving the number of product parts and reducing costs.

[0026] In a preferred embodiment, the driver board 51 is a metal-based printed circuit board (MCPCB), including driver component pads 511, through holes (512, 516), wire bonding holes (513, 515), vent holes 514, and driver board mounting surface 517. The wire bonding holes (513, 515) of the driver assembly 5 are insulated, and the driver board mounting surface 57 is in close contact with the front panel mounting surface 4113.

[0027] Without a separate heat sink, the driver component 5 can be placed back-to-back with the LED component 4, which can effectively dissipate heat by utilizing the large front panel of the LED component 4.

[0028] Meanwhile, the soldering holes of LED component 4 and driver component 5 correspond one-to-one, and the wires are connected to LED component 4 and driver component 5 without bending during the soldering process, which simplifies the internal wiring of the product. In a preferred embodiment, the back cover 7 is made of aluminum alloy and includes a mounting cavity 72, a back cover mounting surface 71, through holes (73, 74, 75), and an electrical connector mounting hole 76. The back cover mounting surface 71 contacts the front panel mounting surface 4113, and the electrical connector mounting hole 76 is used to fix the electrical connector 8.

[0029] In a preferred embodiment, the electrical connector 8 is a snap-fit ​​type and is installed in the electrical connector mounting hole 76 of the rear cover 8.

[0030] In a preferred embodiment, the drive assembly 5 and the LED assembly 4 are fixed together to the front cover 3 by screws 6.

[0031] In a preferred embodiment, screws 6 pass through mounting holes (412, 416, 4111) on the front panel 41 to secure the rear cover 7 to the front cover 3.

[0032] After the LED component 4 and the driver component 5 are placed back to back, they are installed with the front cover 3 using screws. The three parts are stacked together, which simplifies the product structure and saves product costs. Example 2

[0033] This embodiment provides a manufacturing process for aircraft cargo hold lights, including the following steps: S1: Manufacturing LED components Step S11: Apply solder paste to the front panel 41 using a solder paste template; Step S12: Place the LED chip 42 on the front panel 41 and solder it by reflow soldering; Step S13: Inspect the welding quality using the naked eye and XRAY equipment until it passes the inspection; S2: Create driver components Step S21: Apply solder paste to the driver board 51 using a solder paste template; Step S22: Place the driving component 52 on the front panel 41 and perform reflow soldering. Step S23: Inspect the welding quality using the naked eye and XRAY equipment until it passes the inspection; S3: Overall Assembly Step S31: Place the driver assembly 5 and the LED assembly 4 back to back, so that their mounting holes, wire bonding holes, and vent holes correspond one to one. Step S32: Place the front cover 3 on the LED assembly 4, so that its mounting thread holes correspond one-to-one with the mounting holes on the LED assembly 4; Step S33: Install the driver assembly 5, LED assembly 4 and front cover 3 with screws 6, and then solder wires through the wire soldering holes; Step S34: Install the electrical connector 8 on the rear cover 7 and connect it to the drive assembly 4; Step S35: Make the rear cover mounting surface 71 contact the front panel mounting surface 4113 so that the mounting holes of the rear cover 7 correspond one-to-one with the mounting holes of the front panel, and use screws 6 to install and fix it. S4: Capping Step S41: Sandblast the quartz glass screen 1; Step S42: Attach the quartz glass screen 1 to the front cover 3 using the pre-formed polyacrylic adhesive pad 2.

[0034] The above-described embodiments are merely illustrative of certain implementations of the present invention, and are described in a relatively specific and detailed manner. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An aircraft cargo hold light, characterized in that: include: A front cover, the upper end of which is bonded with a frosted quartz glass screen via a prefabricated polyacrylic adhesive pad; An LED assembly is arranged at the lower end of the front cover, and the LED assembly includes a front panel and a plurality of white light LED chips; A driving assembly is arranged on the back of the LED assembly, the driving assembly includes a driving board and a plurality of driving components, and the driving assembly is electrically connected to the LED assembly; The back cover is provided with a cavity for accommodating the driving assembly. An electrical connector is arranged on one side of the back cover, and the electrical connector is electrically connected to the driving assembly.

2. The aircraft cargo hold light according to claim 1, characterized in that: The front cover is a stepped circular ring structure made of aluminum alloy, the inner ring of the circular ring structure is used to accommodate the LED chip, and the stepped structure is used to accommodate the quartz glass sheet.

3. The aircraft cargo hold light according to claim 1, characterized in that: The front panel in the LED assembly and the driving board in the driving assembly are both metal-based printed circuit boards, and the entire panel is copper-plated to improve heat dissipation efficiency.

4. The aircraft cargo hold light according to claim 1, characterized in that: The LED component and the driving component adopt a back-to-back installation structure, and are designed with one-to-one corresponding fixing holes, welding wire holes and ventilation holes.

5. The aircraft cargo hold light according to claim 1, characterized in that: The LED assembly and the driving assembly are fixed on the front cover together with screws through corresponding fixing holes.

6. The aircraft cargo hold light according to claim 1, characterized in that: The size of the prefabricated polyacrylic rubber pad is adapted to the quartz glass screen.

7. The aircraft cargo hold light according to claim 1, characterized in that: The rear cover is made of aluminum alloy, the mounting surface of the rear cover contacts the back of the front panel, and screws pass through the through holes on the front panel to fix the rear cover on the front cover.

8. The aircraft cargo hold light according to claim 1, characterized in that: The electrical connector is of a snap-on type and is installed in the installation hole of the rear cover.

9. The aircraft cargo hold light according to claim 1, characterized in that: The front cover is made of aluminum alloy material, and the light outlet hole formed by the front cover is larger than the LED chip coverage area of ​​the front panel.

10. A manufacturing process for aircraft cargo hold lights, characterized in that: The following steps are included S1: Making LED components Step S11: applying solder paste on the front panel using a solder paste template; Step S12: placing the LED chip on the front panel and soldering it by reflow soldering; Step S13: Use naked eyes and XRAY equipment to inspect the welding quality until it is qualified; S2: Make drive components Step S21: applying solder paste on the driver board using a solder paste template; Step S22: placing the driving components on the front panel and subjecting them to a reflow soldering process; Step S23: Use naked eyes and XRAY equipment to inspect the welding quality until it is qualified; S3: Overall assembly Step S31: placing the driver assembly and the LED assembly back to back so that their mounting holes, welding wire holes, and ventilation holes correspond one to one; Step S32: placing the front cover on the LED assembly so that the mounting threaded holes thereof correspond one to one with the mounting holes on the LED assembly; Step S33: Use screws to install the driver assembly, the LED assembly and the front cover, and perform wire welding through the welding holes; Step S34: installing the electrical connector on the rear cover and connecting the electrical connector to the drive assembly; Step S35: contact the mounting surface of the rear cover with the mounting surface of the front panel, make the mounting holes of the rear cover correspond to the mounting holes of the front panel one by one, and use screws to fix them; S4: Capping Step S41: sandblasting the quartz glass screen; Step S42: The quartz glass screen is adhered to the front cover through a prefabricated polyacrylic adhesive pad.

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