A non-direct LED soft light guide trunk atmosphere lamp with constant voltage drive

Abstract

This utility model relates to the field of automotive lighting technology, specifically a non-direct-light LED flexible light guide front trunk ambient light with constant voltage drive. It includes a silicone flexible light guide LED strip, an adapter wiring harness, and a constant voltage driver for converting vehicle body current into a constant voltage steady-state current. The adapter wiring harness has a first connector for connecting to the vehicle body power supply connector, a second connector for connecting to the front trunk emergency switch, and a third connector for connecting to the constant voltage driver. The output terminals of the third connector are positive and negative pins, which are connected to the silicone flexible light guide LED strip. The constant voltage driver includes a housing, a driver board encapsulated within the housing, and a rear cover. This utility model solves the problems of emergency switch failure, circuit safety hazards, and glare in the prior art, and has an IP67 sealing rating and overload protection function.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, specifically a non-direct-light LED soft light guide front trunk ambient light with constant voltage drive. Background Technology

[0002] Today, people's enthusiasm for personalized car customization is growing, and compliant car customization and modification solutions are becoming increasingly popular. Among them, DIY modification solutions are favored by some car owners due to their ease of use and the fact that they do not require modification at 4S stores or third parties. DIY car modification parts have a relatively broad market. However, some unofficial modification parts often have poor compatibility, use non-automotive-grade components and materials, leading to certain defects and safety risks after installation, such as abnormal noises, detachment or falling off while driving, and overload damage leading to fire. There are many parts manufacturers, with varying quality, and most products have not undergone whole-vehicle testing, posing potential risks under extreme conditions and endangering the lives and property of occupants. Nowadays, new energy vehicles, especially pure electric models, are widely equipped with front trunks for temporarily carrying luggage and other items. Some models, such as Tesla, are equipped with an emergency switch in the front trunk to prevent children from being locked inside due to negligence. This emergency switch also has a lighting function, but because its brightness is low, its installation position is relatively low, and only one is installed on one side, the lighting effect in the front trunk at night is poor. When items are placed in the front trunk, the light of the emergency switch will be blocked by the items in front, resulting in insufficient light to search for items in the back, making it less practical.

[0003] In existing technologies, there are LED light strip products used for front trunk lighting. Their power connection principle involves connecting the positive and negative terminals of the LED light strip to the original emergency switch circuit, achieving circuit integration and conversion. Specifically, the LED light strip is equipped with male and female connectors compatible with the emergency switch connector, which respectively connect to the emergency switch connector and the vehicle body power supply connector. The positive and negative terminals of the LED light strip are connected to the positive and negative lines of the emergency switch, thus achieving power conversion. This method can power the LED light strip, but it can conflict with the original emergency switch circuit, causing the emergency switch to malfunction and resulting in the loss of the vehicle's original functions, posing a certain safety risk. Another type of LED light strip connects only the positive terminal to the emergency switch circuit, while the negative terminal is connected to the vehicle body grounding rivet. This avoids the emergency switch failure phenomenon. However, in this form, the terminals are exposed. The front compartment is a non-sealed space, and the terminals may rust and age due to liquid corrosion, risking detachment and causing the LED light strip to fail. Furthermore, exposed terminals pose a risk of accidental electric shock, short circuits, and poor reliability and lifespan of the light strip. Furthermore, commercially available front trunk LED light strips of this type are not equipped with constant voltage drive modules. The circuit is directly connected to the vehicle's electrical system, resulting in significant fluctuations in the vehicle's power supply current. There is no effective temperature control or overcurrent / overvoltage protection, posing a risk of overload burnout. Brightness uniformity also fluctuates considerably, leading to a shorter lifespan. Secondly, currently available front trunk light strips cannot be completely concealed after installation; the light-emitting surface is directly visible, compromising the original aesthetic appeal of the front trunk and lacking refinement. Moreover, most are direct-light LED solutions, resulting in excessive brightness that can cause glare and a poor ambiance. Utility Model Content

[0004] The purpose of this invention is to provide a non-direct-light LED soft light guide front trunk ambient light with constant voltage drive to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a non-direct-light LED soft light guide front trunk ambient light with constant voltage drive, comprising a silicone soft light guide LED light strip, an adapter wiring harness, and a constant voltage driver for converting vehicle body current into constant voltage steady-state current. The adapter wiring harness is provided with a first connector for connecting to the vehicle body power supply connector, a second connector for connecting to the front trunk emergency switch, and a third connector for connecting to the constant voltage driver. The output end of the third connector is a positive and negative pin, which are connected to the silicone soft light guide LED light strip. The constant voltage driver includes a housing, a drive board encapsulated in the housing, and a rear cover.

[0006] Preferably, the silicone flexible light guide LED light strip includes a silicone sleeve, an FPC LED light board, and a sealing plug. The silicone sleeve covers the FPC LED light board, and the sealing plugs are nested at both ends of the silicone sleeve and glued together for sealing.

[0007] Preferably, the silicone soft light guide LED light strip is snapped into the flange of the front trunk sealing strip, and the light emission direction is towards the bottom of the cabin.

[0008] Preferably, the positive and negative leads are soldered to the FPC LED light board.

[0009] Preferably, the housing and rear cover of the constant pressure actuator are sealed by ultrasonic welding.

[0010] Preferably, the silicone sleeve has a side-emitting diffusion structure, and the LED light is refracted by the silicone sleeve and then emitted from the bottom light-emitting surface.

[0011] Preferably, the welding points of the positive and negative leads to the FPC LED light board, as well as the penetration points of the wires and the sealing plugs, are provided with wire plug sealing structures.

[0012] Preferably, the constant pressure actuator further includes an adhesive tape, which is used to fix the constant pressure actuator to the front trunk cover.

[0013] Preferably, the ambient light as a whole meets the IP67 protection level requirement.

[0014] Compared with the prior art, this utility model provides a non-direct-light LED soft light guide front trunk ambient light with constant voltage drive, which has the following beneficial effects:

[0015] (1) Includes a constant voltage driver. The vehicle body current is converted into a constant voltage steady-state current by the constant voltage driver and then supplied to the silicone soft light guide LED strip. The silicone soft light guide LED strip works stably at the set power. The LED brightness fluctuates little, the lighting uniformity and stability are good, and the lighting appearance is better. It includes overcurrent, overvoltage and temperature control protection, which is safe and has a long service life.

[0016] (2) Includes a constant voltage driver, which can convert the vehicle body current into a constant voltage steady-state current. At the same time, the output current value can be preset and set within a certain range. This can avoid the phenomenon that the emergency switch will fail due to excessive LED current shunting after the silicone soft light guide LED strip is integrated into the emergency switch circuit. In addition, the whole lamp adopts an IP67 dustproof and waterproof design, which has good sealing performance.

[0017] (3) The silicone soft light guide LED light strip adopts the snap-fit ​​with the groove of the front trunk sealing strip and the LED side light emission form. It is not visible on the rear light-emitting surface after being assembled on the vehicle body. The light is emitted from the bottom of the sealing strip, and the light does not shine directly into people's eyes. The brightness is set reasonably, and it has the advantages of anti-glare and strong atmosphere. Attached Figure Description

[0018] Figure 1 This is a 3D view of the overall assembly of this utility model;

[0019] Figure 2This is an exploded view of the disassembled sub-parts of this utility model;

[0020] Figure 3 This is a diagram showing the connection relationship of the adapter wire harness of this utility model;

[0021] Figure 4 This is a schematic diagram of the current loop of this utility model;

[0022] Figure 5 This is a block diagram of the circuit system of this utility model;

[0023] Figure 6 This is a schematic diagram of the installation of the silicone flexible light guide LED light strip of this utility model.

[0024] Explanation of reference numerals in the attached diagram: 1. Silicone flexible light guide LED light strip; 11. Silicone sleeve; 12. FPC LED light board; 13. Sealing plug; 2. Adapter wire harness; 21. First connector; 22. Second connector; 23. Third connector; 24. Wire; 25. Positive and negative pins; 3. Constant voltage driver; 31. Housing; 32. Driver board; 33. Rear cover; 34. Screw; 35. Tape; 4. Front trunk emergency switch; 5. Vehicle body power supply connector; 6. Sealing strip; 7. Front trunk. Detailed Implementation

[0025] The technical solutions of the present utility model will now be described with reference to the accompanying drawings in the embodiments of the present utility model:

[0026] The shortcomings of existing technology:

[0027] 1. In the existing technology, the solution of directly connecting the positive and negative terminals of the LED light strip to the emergency switch circuit in the front trunk will conflict with the emergency switch circuit, causing the emergency switch function to fail and the original function of the vehicle body to be lost.

[0028] 2. In the existing technology, the positive terminal of the LED light strip is connected to the emergency switch circuit in the front trunk, and the negative terminal is connected to the grounding rivet through an external terminal. Although this can avoid the failure of the emergency switch, the terminal connected to the grounding rivet is exposed, has a low protection level, and may rust, fall off, or short-circuit after being corroded by liquids and moisture for a long time. It also has a short service life and risks of leakage, electric shock, short circuit and burnout that endanger the safety of passengers.

[0029] 3. In the existing technology, LED light strips are all powered directly from the vehicle body to emit light. The vehicle body current fluctuates greatly. The direct supply of vehicle body current without being driven to be converted into steady current will cause LED flickering, low lighting uniformity, poor appearance, and the lack of overcurrent, overvoltage and temperature control protection will lead to LED overload burnout and reduced lifespan.

[0030] 4. In the existing technology, after the LED light strip is installed in the front trunk, the light-emitting surface is visible. The LEDs shine directly and the brightness is set too high, which can easily cause glare to people's eyes. Long-term use will endanger the visual health of passengers.

[0031] The technical problem to be solved by this utility model is:

[0032] (1) Solve the problem of emergency switch failure caused by LED light strips being integrated into the emergency switch circuit.

[0033] (2) Solve the problem of short circuits and leakage caused by exposed terminals of LED light strips connected to grounding rivets.

[0034] (3) Solve the problems of LED light strips being directly powered by the vehicle body current, such as flickering, low uniformity, lack of overload protection, short lifespan, and safety risks.

[0035] (4) Solve the problem of glare caused by the LED light strip being directly visible to the human eye after installation, direct LED light, and excessive brightness.

[0036] like Figure 1-6 As shown, this utility model provides a non-direct-light LED soft light guide front trunk ambient light with constant voltage drive, including a silicone soft light guide LED light strip 1, an adapter wiring harness 2, and a constant voltage driver 3 for converting the vehicle body current into a constant voltage steady-state current.

[0037] The silicone flexible light guide LED light strip 1 is snapped into the flange of the sealing strip 6 of the front trunk 7, with the light emission direction facing the bottom of the cabin. The silicone flexible light guide LED light strip 1 includes a silicone sleeve 11, an FPC LED light board 12, and a sealing plug 13. The silicone sleeve 11 has a side-emitting diffusion structure, and the LED light is refracted by the silicone sleeve 11 and then emitted from the bottom light-emitting surface. The silicone sleeve 11 covers the FPC LED light board 12, and the sealing plugs 13 are nested at both ends of the silicone sleeve 11 and sealed with adhesive.

[0038] The adapter wiring harness 2 is equipped with a first connector 21 for connecting to the vehicle body power supply connector 5, a second connector 22 for connecting to the front trunk emergency switch 4, and a third connector 23 for connecting to the constant voltage driver 3. The output terminals of the third connector 23 are positive and negative pins 25, which are connected to the silicone flexible light guide LED strip 1. The positive and negative pins 25 are soldered to the FPC LED light board 12. A wire plug sealing structure is provided at the solder joints between the positive and negative pins 25 and the FPC LED light board 12, as well as at the point where the wire 24 of the adapter wiring harness 2 passes through the sealing plug 13.

[0039] The constant voltage actuator 3 includes a housing 31, a drive board 32 encapsulated within the housing 31, and a rear cover 33. The housing 31 and the rear cover 33 of the constant voltage actuator 3 are sealed by ultrasonic welding. The drive board 32 includes a filter module and a DC voltage conversion module, used to convert the vehicle body input voltage into a constant DC output voltage. The constant voltage actuator 3 also includes adhesive tape 35, which is used to fix the constant voltage actuator 3 to the front trunk cover. The ambient lighting as a whole meets the IP67 protection rating requirement.

[0040] The following are the specifics:

[0041] like Figure 1 The diagram shows a 3D view of the front trunk LED silicone soft light guide ambient light assembly, which consists of three parts: silicone soft light guide LED light strip 1, adapter wiring harness 2, and constant voltage driver 3.

[0042] like Figure 2 The diagram shows an exploded view of the disassembled components. The silicone flexible light guide LED light strip 1 includes a silicone sleeve (3 colors) 11, an FPC LED light board 12, and a sealing plug 13. The silicone sleeve 11 is extruded and formed in one piece, covering the FPC LED light board 12. The sealing plugs are nested at both ends and glued together to achieve a seal. The adapter wire harness 2 includes a first connector 21, a second connector 22, a third connector 23, a wire 24, and positive and negative pins 25. The constant pressure driver 3 includes a housing 31, a drive plate 32, a rear cover 33, screws 34, and tape 35. The drive plate 32 is secured to the housing 31 by a screw 34. The rear housing and the rear cover 33 are ultrasonically welded to achieve a seal. The tape 35 is double-sided adhesive, with one side attached to the rear cover 33 and the other side attached to the back of the front trunk 7 cover of the vehicle body.

[0043] like Figure 3 The diagram shows the connection relationship of the adapter wiring harness, specifically illustrating the wiring logic of the adapter wiring harness and the connection relationships between each connector and the vehicle body, the silicone flexible light guide LED strip 1, and the constant voltage driver 3. The first connector 21 connects to the front trunk emergency switch vehicle body power supply connector 5 (female end), i.e., the vehicle body power supply connector, to facilitate the introduction of vehicle body current; the second connector 22 connects to the front trunk emergency switch 4, providing power to the emergency switch; the third connector 23 connects to the constant voltage driver 3, with the upper two wires guiding the vehicle body current into the constant voltage driver 3 and the lower two wires guiding the constant voltage steady-state current converted by the constant voltage driver 3 outwards; the positive and negative pins 25 are soldered to the FPC LED board 12 in the silicone flexible light guide LED strip 1, enabling the input of the constant voltage steady-state current from the constant voltage driver 3 to the silicone flexible light guide LED strip 1.

[0044] like Figure 4The diagram shows the current loop between the silicone flexible light guide LED strip and the emergency switch after the LED strip is integrated into the emergency switch circuit. As shown in the solid-line box (loop 1), the current loop for the silicone flexible light guide LED strip 1 is as follows: the current enters through the emergency switch's body power supply connector 5 (female terminal), flows through the first connector 21 of the adapter wiring harness 2 to achieve current shunting, and a portion of the current flows through the third connector 23 into the constant voltage driver 3. In the constant voltage driver 3, it is converted into a constant voltage steady-state current before flowing out through the third connector 23 to the silicone flexible light guide LED strip 1, thus providing a constant voltage steady-state current for the silicone flexible light guide LED strip 1. As shown in the dashed-line box (loop 2), the current loop for the emergency switch is as follows: the body current flows through the first connector 21 of the adapter wiring harness 2 to achieve current shunting, and a portion of the current flows through the second connector 21 into the emergency switch, thus supplying power to the emergency switch.

[0045] like Figure 5 The diagram shown is a circuit system block diagram. The system has four LEDs in series and multiple LEDs in parallel. A constant voltage driver 3 provides a constant voltage to control the uniformity and stability of the brightness. The constant voltage driver 3 contains a filter circuit and a DC voltage conversion module. The filter circuit is connected to the DC voltage conversion module to convert the vehicle body input voltage into a constant DC output voltage, realizing the function of 12V output from an input voltage of 10-18V.

[0046] like Figure 6 The diagram shows the installation of a silicone flexible light guide LED light strip. As shown, the sealing strip 6 is snapped onto the front trunk 7. The silicone flexible light guide LED light strip 1 is inserted into the flange of the sealing strip 6 from bottom to top. The sealing strip 6 is made of EPDM flexible material, and the silicone flexible light guide LED light strip 1 is made of silicone flexible material. This fit is a double flexible material snap-fit ​​structure. After assembly with the sealing strip 6, the silicone flexible light guide LED light strip 1 is hidden inside the flange of the sealing strip 6. When viewed from the direction of sight, the light strip body and the light-emitting surface after lighting are not visible. The silicone flexible light guide LED light strip 1 is a side-emitting type. The semi-transparent part of the silicone sleeve 11 has the property of diffusing light, which can guide the light emitted by the LED to the light-emitting surface. After the silicone flexible light guide LED light strip 1 is assembled with the sealing strip 6, the light-emitting surface faces downward and is not blocked, which can illuminate the area inside the front trunk 7, providing good lighting conditions for the front trunk 7.

[0047] Specific installation method of the light fixture: The LED silicone flexible light guide front trunk ambient light was in the following state before installation. Figure 1 The assembly shown is described below, and the specific assembly steps are as follows:

[0048] 1. Insert the silicone soft light guide LED light strip into the flange of the front trunk 7 sealing strip 6;

[0049] 2. Remove the cover of the emergency switch 4 in the front trunk and unplug the vehicle power connector of the emergency switch;

[0050] 3. Connect the first connector 21 and the second connector 22 to the vehicle body power supply connector and the emergency switch, respectively;

[0051] 4. Peel off the adhesive tape 35 on the back of the constant pressure driver 3 and stick the constant pressure driver 3 to the designated position on the front trunk emergency switch 4 cover plate;

[0052] 5. Adjust the adapter cable harness 2 to the appropriate position, cover the front trunk emergency switch 4 cover, and the installation is complete.

[0053] Sealing Solution: The LED silicone soft light guide front trunk ambient light assembly meets the IP67 dustproof and waterproof rating requirements after assembly with the vehicle body, and all its sub-components adopt a sealed design. Among them, the adapter wire harness 2 uses three waterproof connectors, which are sealed after being plugged into the mating ends. After the positive and negative pins 25 are welded to the FPC LED light board 12 of the silicone soft light guide LED light strip 1, the wire 24 is led out from the sealing plug 13. Here, a wire plug is added between the wire 24 and the wire hole of the sealing plug 13 to achieve sealing. The silicone soft light guide LED light strip 1 is formed by extruding the FPC LED light board 12 with a three-color silicone sleeve. Except for the openings at both ends, all other positions meet the sealing requirements. The two ends are sealed with sealing plugs 13 and glue, and the wire hole of the sealing plug 13 is sealed with a wire plug. The constant pressure driver 3 is sealed by ultrasonic welding of the housing 31 and the rear cover 33. The sheath integrated into the housing 31 is sealed after being plugged into the third connector 23.

[0054] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A non-direct-light LED flexible light guide front trunk ambient light with constant voltage drive, characterized in that: The device includes a silicone flexible light guide LED light strip (1), a converter wiring harness (2), and a constant voltage driver (3) for converting the vehicle body current into a constant voltage steady-state current. The converter wiring harness (2) is provided with a first connector (21) for connecting to the vehicle body power supply connector (5), a second connector (22) for connecting to the front trunk emergency switch (4), and a third connector (23) for connecting to the constant voltage driver (3). The output end of the third connector (23) is a positive and negative pin (25), which is connected to the silicone flexible light guide LED light strip (1). The constant voltage driver (3) includes a housing (31), a drive board (32) encapsulated in the housing (31), and a rear cover (33).

2. The non-direct-light LED flexible light guide front trunk ambient light with constant voltage drive according to claim 1, characterized in that: The silicone soft light guide LED light strip (1) includes a silicone sleeve (11), an FPC LED light board (12), and a sealing plug (13). The silicone sleeve (11) covers the FPC LED light board (12), and the sealing plugs (13) are nested at both ends of the silicone sleeve (11) and glued together for sealing.

3. The non-direct-light LED flexible light guide front trunk ambient light with constant voltage drive according to claim 1, characterized in that: The silicone soft light guide LED light strip (1) is snapped into the flange of the sealing strip (6) of the front trunk (7), and the light emission direction is towards the bottom of the cabin.

4. The non-direct-light LED flexible light guide front trunk ambient light with constant voltage drive according to claim 1, characterized in that: The positive and negative leads (25) are soldered to the FPC LED light board (12).

5. The non-direct-light LED flexible light guide front trunk ambient light with constant voltage drive according to claim 1, characterized in that: The housing (31) and the rear cover (33) of the constant pressure drive (3) are sealed by ultrasonic welding.

6. The non-direct-light LED flexible light guide front trunk ambient light with constant voltage drive according to claim 2, characterized in that: The silicone sleeve (11) is a side-emitting diffusion structure. The LED light is refracted by the silicone sleeve (11) and then emitted from the bottom light-emitting surface.

7. The non-direct-light LED flexible light guide front trunk ambient light with constant voltage drive according to claim 2, characterized in that: The positive and negative pins (25) are welded to the FPC LED board (12), and the wires (24) of the adapter wire harness (2) are connected to the sealing plug (13) through which the wires pass. A wire plug sealing structure is provided.

8. The non-direct-light LED flexible light guide front trunk ambient light with constant voltage drive according to claim 1, characterized in that: The constant pressure drive (3) also includes tape (35), which is used to fix the constant pressure drive (3) to the front trunk cover.

9. The non-direct-light LED flexible light guide front trunk ambient light with constant voltage drive according to claim 1, characterized in that: The ambient light meets the IP67 protection rating requirement.

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