CN213712961U

CN213712961U - Automobile headlight bulb

Info

Publication number: CN213712961U
Application number: CN202023088643.6U
Authority: CN
Inventors: 石家声; 陈国平
Original assignee: Guangzhou Guanglian Electronic Technology Co ltd
Current assignee: Guangzhou Guanglian Electronic Technology Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-07-16
Anticipated expiration: 2030-12-18

Abstract

The utility model relates to a car headlight bulb in car light field, including anti-light cup, LED subassembly 7, laser subassembly, radiator 4, bulb body 20. The laser assembly includes an exit optical system, a wavelength conversion device 6, a laser 8, and a reflector. The bulb body 20 is provided with an exit optical system, a wavelength conversion device 6, an LED module 7, a laser 8, and a heat sink 4 in this order from front to back. The bulb body 20 transfers heat generated by the LED assembly 7 and the laser assembly to the heat sink 4. The excitation light generated by the laser 8 is reflected at least twice by the reflector and passes the side of the LED assembly 7 to be incident on the wavelength conversion device 6. The excitation light is converted into stimulated light by the wavelength conversion device 6, and the stimulated light is output forward as auxiliary illumination light by the emitting optical system. The LED module 7 emits light from the left and right sides, and outputs main illumination light forward after being reflected by the reflection cup. The bulb has the characteristics of an LED car lamp bulb, and has the auxiliary high beam lighting effect and the better heat dissipation effect.

Description

Automobile headlight bulb

Technical Field

The utility model relates to an automobile lamp field, more specifically relates to an automobile headlamp bulb.

Background

Most of the vehicle light bulbs today are of the LED type, as investigated and analyzed by the vehicle light market. The bulb has the defects that the bulb only depends on the double-sided LED chip to emit light, the illumination is not high, and the effect of a high beam is not achieved. Because the driver drives at night, especially when the road conditions of driving are complicated, the driver often needs to be helped to widen the vision by using the auxiliary high beam, and the driving safety is improved. Therefore, the conventional LED car lamp bulb in the current market is difficult to meet the requirements.

Patent application CN202010753651, a combined laser and LED vehicle lamp discloses a combined laser and LED vehicle lamp bulb structure. The structure is additionally provided with a laser module at the upper end of the original LED bulb, and heat is transferred to a heat radiation body by using a heat pipe. A hanging frame fan is arranged in the heat radiation body to accelerate heat transfer. However, since the distance between the laser tube of the laser module and the heat sink is long and limited by the ventilation aperture of the heat pipe, the laser tube has the problems of heat accumulation and poor heat dissipation when working for a long time. Poor heat dissipation can shorten the life of laser tube.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at overcoming above-mentioned prior art not enough, provide a car headlight bulb, this bulb possesses outside LED car light bulb's the characteristic, has supplementary high beam illuminating effect and better radiating effect.

The utility model discloses the technical scheme who takes is, on traditional LED car light bulb's basis, has increased laser subassembly. The laser assembly includes an exit optical system, a wavelength conversion device, a laser, and a reflector. After the LED car lamp bulb is installed, the rear end of the LED car lamp bulb is positioned outside the car lamp. In order to effectively dissipate heat of each component of the bulb and keep the components interchangeable with the existing bulb, the bulb body is sequentially provided with an emergent optical system, a wavelength conversion device, an LED component, a laser and a radiator from front to back. The bulb body transfers heat generated by the LED assembly and the laser assembly to the radiator for heat dissipation. The exciting light generated by the laser is reflected at least twice by the reflector and enters the wavelength conversion device through the side edge of the LED component. The excitation light is converted in wavelength by the wavelength conversion device, and the auxiliary illumination light is finally output forward by the exit optical system. The LED assembly emits light from the left side and the right side, and outputs main illumination light forwards after being reflected by a reflecting cup of the car lamp.

In the above scheme, the laser has good directivity and extremely high brightness, and the auxiliary high beam illumination effect can be realized through the auxiliary illumination light which is output forwards by the laser component. The auxiliary illumination light and the main illumination light jointly form the illumination light of the bulb, and the bulb has higher illumination intensity. In addition, because the laser device is adjacently connected with the radiator, the heat conduction efficiency is high, the heat radiation is good, the heat accumulation can be effectively avoided, and the service life of the laser device is prolonged.

As a semiconductor laser light source, the laser needs to ensure the environment to be dustproof and clean during working, and the working temperature cannot be too high, otherwise, the service life of the laser can be influenced, and the laser is even damaged.

Preferably, in order to secure heat dissipation of each component in the bulb, the bulb is structured as follows. The bulb body comprises a first installation part, a second installation part and a third installation part which are sequentially connected from front to back. The emission optical system and the wavelength conversion device are mounted inside the first mounting portion. The LED assembly is mounted on the mounting plane of the second mounting portion. The reflectors are installed inside the first and third installation parts, respectively. The laser is mounted inside the third mounting portion. The rear end of the third mounting part is connected with the radiator. The bulb body transfers heat generated by the wavelength conversion device, the LED assembly and the laser to the radiator. The radiator exchanges heat with air through the fins on the radiator, and the radiating effect is achieved.

Preferably, in order to improve the heat dissipation effect of the laser, a special laser mounting plate can be configured. The laser is installed in the front end of laser mounting panel, and the outer wall of laser mounting panel is connected with the inner wall of radiator. The heat generated by the laser is concentrated and is quickly guided to the radiator through the laser mounting plate.

Preferably, in order to improve the overall heat dissipation effect, a fan assembly may be further configured. The fan assembly is installed at the rear end of the radiator and blows air to the radiator to accelerate heat dissipation.

Preferably, the heat sink and the bulb body may be integrally formed or separately formed. When the split type heat-conducting adhesive is designed in a split mode, the two pieces are firmly adhered by smearing a layer of heat-conducting adhesive. The split design has the advantages that the radiator and the bulb body are relatively easy to process and manufacture, and the product cost is saved. However, the split design has poor heat conduction effect and limited heat dissipation capability, and therefore, the split design is only used for the condition of low bulb power.

The third installation department of bulb body is provided with buckle and silica gel circle to satisfy and have the mutual replacement of car light bulb now. The bulb is fixed in the automobile lamp through a buckle. The silica gel circle plays sealed effect, prevents that water, dust from carrying out the car light inside.

Preferably, in order to make the bulb structure more compact, the exit optical system, the wavelength conversion device, and the LED assembly are disposed on the same line.

Preferably, in order to ensure the sealing and dust prevention of the laser light path, the side edge of the LED assembly is provided with a closed channel along the front-back direction, and the excitation light generated by the laser passes through the closed channel. By integrating the structure design and the light path design, the exciting light generated by the laser is sealed and dustproof in the whole light path, and has no light leakage, thereby meeting the safe use of the laser, protecting the laser and prolonging the service life of the laser.

Preferably, the closed passage may be formed by connecting the cover plate and the second mounting portion. The side of apron andor second installation department is equipped with the recess, and the back is connected with the second installation department to the apron, and the recess forms airtight passageway promptly. Meanwhile, the LED assembly is positioned between the cover plate and the second installation part, and after the LED assembly and the second installation part are connected, the LED assembly is fixedly installed. Through a apron, realized airtight passageway and LED subassembly's installation simultaneously and fixed, simplified the spare part and the installation of bulb, reduced the manufacturing cost of bulb.

Preferably, the surfaces of the cover plate and the second mounting part are both provided with light through holes, so that the LED assembly can emit main illumination light left and right from the light through holes.

Preferably, the reflector is configured as follows according to the layout pattern of components in the bulb.

Scheme one, four reflectors are configured: the reflector comprises a first reflector, a second reflector, a third reflector and a fourth reflector. The exciting light generated by the laser is reflected by the first reflector and the second reflector and then passes through the side edge of the LED assembly. The third reflector and the fourth reflector in turn reflect the excitation light and direct it to the wavelength conversion device.

Scheme two, two reflectors are configured: a third reflector and a fourth reflector. The excitation light generated by the laser passes directly from the side of the LED assembly. The third reflector and the fourth reflector sequentially reflect the excitation light and guide the excitation light to the wavelength conversion device.

In more detail, the excitation light in the above two embodiments is reflected by the third reflector and the fourth reflector in sequence, and then guided to the wavelength conversion device from the front or the back. When the exciting light enters from the front, the wavelength conversion device is in a reflection type, so that the structure is more compact; when the exciting light is injected from the back, the wavelength conversion device is of a transmission type, and the structure is simpler.

Furthermore, in order to make the auxiliary illumination light more concentrated, the excitation light generated by the laser needs to be focused on the wavelength conversion device. Therefore, a first lens is arranged in front of the laser or behind the third reflector.

Preferably, in order to make the auxiliary illumination light parallel, the exit optical system is configured with a second lens and a third lens, and is arranged in order from the back to the front, and the wavelength conversion device is located at a combined focal point of the second lens and the third lens. The received laser light converted by the wavelength conversion device is collimated into parallel auxiliary illumination light by the second lens and the third lens and then emitted forwards.

Compared with the prior art, the beneficial effects of the utility model are that:

through on the basis of traditional LED car light bulb, increase and arrange laser assembly in good order for car light bulb has supplementary far-reaching headlamp illuminating effect and better radiating effect under the compact of keeping car light bulb and interchangeability's prerequisite, and the wholeness can have great improvement.

Drawings

Fig. 1 is a first schematic structural diagram of an automotive headlamp bulb.

Fig. 2 is a schematic structural diagram of a headlight bulb of an automobile.

Fig. 3 is a third schematic structural diagram of an automotive headlamp bulb.

Fig. 4 is a first laser path diagram of a headlight bulb.

Fig. 5 is a second laser path diagram of a car headlight bulb.

Fig. 6 is a third laser path diagram of a car headlight bulb.

The attached drawings are as follows: a bulb body 20; a first mounting portion 1; a second mounting portion 2; a third mounting portion 3; a heat sink 4; a fan assembly 5; a wavelength conversion device 6; an LED assembly 7; a laser 8; a cover plate 9; a buckle 10; a silica gel ring 11; a laser mounting board 12; a closed channel 13; a bulb axis 14; a light-passing hole 15; a first reflector 21; a second reflector 22; a third reflector 23; a fourth reflector 24; a first lens 25; a second lens 26; and a third lens 27.

Detailed Description

The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1 and 2, the present embodiment provides an automotive headlamp bulb, which includes a bulb body 20, a heat sink 4, a fan assembly 5, a buckle 10, and a silicone ring 11. The bulb body 20 includes a first mounting portion 1, a second mounting portion 2, and a third mounting portion 3, and is connected in sequence from the front to the rear. The third installation part 3 is sequentially provided with a buckle 10 and a silica gel ring 11 from front to back, and the rear end of the third installation part is sequentially connected with a radiator 4 and a fan assembly 5. The bulb is fixed in the automobile lamp through a buckle 10. The silica gel ring 11 plays a sealing role, and prevents water and dust from entering the interior of the vehicle lamp. The bulb also comprises an LED assembly 7, a cover plate 9 and a laser assembly. The LED assembly 7 is placed between the second mounting part 2 and the cover plate 9, and fixed mounting is achieved through threaded fastening connection between the second mounting part 2 and the cover plate 9. The laser assembly includes an exit optical system, a wavelength conversion device 6, a laser 8, and a reflector. The emission optical system and the wavelength conversion device 6 are centrally mounted inside the first mounting portion 1. Reflectors are installed inside the first and

third installation parts

1 and 3, respectively. The laser 8 is centrally mounted inside the third mounting portion 3. The closed channel 13 is disposed at a side of the LED module 7 and is disposed along a front-rear direction. The centers of the bulb body 20, the heat sink 4, and the fan assembly 5 are all aligned on a straight line, i.e., the bulb axis 14. Therefore, the axes of the emission optical system, the wavelength conversion device 6, and the laser 8 are all collinear and coincide with the bulb axis 14.

In this example, the excitation light generated by the laser 8 is reflected at least twice by the reflector and enters the wavelength conversion device 6 through the closed channel 13 at the side of the LED module 7. The excitation light is converted in wavelength by the wavelength conversion device 6, and finally the auxiliary illumination light is output forward along the bulb axis 14 by the exit optical system. The auxiliary illumination light realizes an auxiliary high beam illumination effect. The LED module 7 emits light from the left and right sides, and outputs main illumination light forward after being reflected by a reflector cup of the vehicle lamp. The auxiliary illumination light and the main illumination light jointly form the illumination light of the bulb, and the bulb has higher illumination intensity.

In this example, the bulb body 20 transfers heat generated by the wavelength conversion device 6, the LED assembly 7, and the laser 8 to the heat sink 4. The fan assembly 5 blows air to the fins on the heat sink 4, and the fins exchange heat with the air to achieve a heat dissipation effect.

According to the embodiment, the laser assembly is additionally and reasonably arranged on the basis of the traditional LED car lamp bulb, so that the car lamp bulb has an auxiliary high-beam lighting effect and a better heat dissipation effect on the premise of keeping the compactness and interchangeability of the car lamp bulb, and the overall performance is greatly improved.

Specifically, the bulb body 20 is cylindrical as a whole, the second mounting portion 2 and the third mounting portion 3 are integrally formed, and the first mounting portion 1 is fastened to the front end of the second mounting portion 2 through threads. The longitudinal section of the second mounting part 2 is I-shaped, and the left side of the second mounting part is provided with a mounting plane for mounting the LED assembly 7. The surface of the third mounting part 3 is provided with an annular groove for placing the silica gel ring 11.

Specifically, as shown in fig. 3, the closed passage 13 is formed by connecting the cover plate 9 and the second mounting portion 2. The side of apron 9 and second installation department 2 all is equipped with corresponding recess, and both ends open the through-hole that has corresponding recess around the second installation department 2 simultaneously. After the cover plate 9 and the second mounting part 2 are fastened and connected through threads, the grooves form a closed channel 13. In addition, the mounting plane on the second mounting portion 2 and the surface of the cover plate 9 are both opened with light passing holes 15 for the LED modules 7 to emit illumination light.

Specifically, the heat sink 4 and the bulb body 20 are designed to be separated from each other, as shown in fig. 3. The radiator 4 is cylindrical, the front end is firmly adhered to the third installation part 3 by smearing a layer of heat-conducting glue, and the rear end is distributed with a plurality of fins along the circumferential direction. The circumferential surface of the heat sink 4 is provided with a notch to leave a space for the wiring harness of the bulb. The fan component 5 is integrally cylindrical, a plurality of grooves are formed in the outer surface of the fan component along the circumferential direction, so that the heat dissipation area is increased, and fan blades are arranged inside the fan component. The front end of the fan component 5 is firmly adhered to the radiator 4 by smearing a layer of heat-conducting glue.

Specifically, the laser mounting plate 12 is a cylindrical boss, and the laser 8 is welded to the boss of the laser mounting plate 12. A U-shaped groove is radially arranged at the cylindrical position of the laser mounting plate 12 to reserve a space for the wiring harness of the laser 8. The cylindrical outer surface of the laser mounting board 12 and the cylindrical inner surface of the heat sink 4 are connected to each other. The heat generated intensively by the laser 8 is rapidly guided to the heat sink 4 through the laser mounting board 12. After the heat sink 4 is firmly adhered to the third mounting portion 3, the laser 8 is located inside the third mounting portion 3, and the laser 8 and the bulb axis 14 are overlapped.

Specifically, in order to make the auxiliary illumination light parallel, the second lens 26 and the third lens 27 are disposed in the emission optical system and are mounted inside the first mounting portion 1 in this order from the rear to the front. The wavelength conversion device 6 is located at the combined focal point of the second lens 26 and the third lens 27. The received laser light converted by the wavelength conversion device 6 is collimated by the second lens 26 and the third lens 27 into parallel auxiliary illumination light, and is emitted along the bulb axis 14.

In order to be able to reduce the size of the lamp bulb as much as possible, space is saved. The present example uses the laser path scheme of fig. 4 to configure the reflector. Four reflectors are provided: a first reflector 21, a second reflector 22, a third reflector 23, a fourth reflector 24. The excitation light generated by the laser 8 is reflected by the first reflector 21 and the second reflector 22 and then passes through the closed channel 13 on the side of the LED module 7. The third reflector 23 and the fourth reflector 24 in turn reflect the excitation light and guide it from the front to the wavelength conversion device 6. The wavelength conversion device 6 is reflective.

Specifically, the first reflector 21 and the second reflector 22 are implemented using a quadrangular prism, and are installed inside the third installation part 3 and in front of the laser 8. The third reflector 23 and the fourth reflector 24 are mounted inside the first mount portion 1 and between the second lens 26 and the third lens 27. The fourth reflector 24 is located on the axis of the bulb to ensure that excitation light can be directed from the front reflection to the centre of the wavelength conversion device 6.

Specifically, in order to make the auxiliary illumination light more concentrated, the excitation light generated by the laser 8 needs to be focused on the center of the wavelength conversion device 6. Therefore, a first lens 25 is disposed inside the first mounting portion 1 and behind the third reflector 23.

Example 2

This embodiment has a configuration substantially similar to that of embodiment 1, except that:

1. the third mounting portion 3 of the bulb body 20 is integrally formed with the heat sink 4.

2. The reflector arrangement employs the laser light path scheme of fig. 5, with the third reflector 23 and the fourth reflector 24 reflecting the excitation light in sequence and directing it from behind to the wavelength conversion device 6. The wavelength conversion device 6 is of a transmissive type.

Specifically, the first reflector 21 and the second reflector 22 are implemented using a quadrangular prism, and are installed inside the third installation part 3 and in front of the laser 8. The third reflector 23 and the fourth reflector 24 are implemented as quadrangular prisms identical to the first reflector 21 and the second reflector 22, are mounted inside the first mounting part 1, and are located behind the wavelength conversion device 6. Because the reflector only uses two identical quadrangular prisms, the parts of the bulb are reduced, the installation structure is simpler, and the cost of the bulb can be further reduced.

Specifically, in order to make the auxiliary illumination light more concentrated, the excitation light generated by the laser 8 needs to be focused on the center of the wavelength conversion device 6. Therefore, the first lens 25 is disposed inside the first mounting portion 1 and between the laser 8 and the first reflector 21.

Example 3

1. the laser 8 is mounted inside the third mounting part 3, but not coincident with the bulb axis 14

2. The third mounting portion 3 of the bulb body 20 is integrally formed with the heat sink 4.

3. The reflector arrangement uses the laser beam path scheme of fig. 6, with only the third reflector 23 and the fourth reflector 24.

Specifically, the laser 8 is directly fixed to the inner surface of the third mounting portion 3 via a mounting plate. The laser light generated by the laser 8 is directed forward through the closed channel 13. The heat generated by the laser 8 is concentrated and rapidly transferred to the inner surface of the third mounting portion 3 through the mounting board, and is further guided to the heat sink 4.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automobile headlamp bulb comprises a reflecting cup, an LED assembly (7), a laser assembly, a radiator (4) and a bulb body (20); the laser assembly comprises an emergent optical system, a wavelength conversion device (6), a laser (8) and a reflector; the LED bulb is characterized in that the bulb body (20) is sequentially provided with an emergent optical system, a wavelength conversion device (6), an LED assembly (7), a laser (8) and a radiator (4) from front to back; the bulb body (20) transfers heat generated by the LED assembly (7) and the laser assembly to the heat sink (4); exciting light generated by the laser (8) is reflected at least twice by the reflector and passes through the side edge of the LED component (7) to be incident to the wavelength conversion device (6); the exciting light is formed into excited light by a wavelength conversion device (6); the received laser is output forwards as auxiliary illumination light by an emergent optical system; the LED component (7) emits light from the left side and the right side, and outputs main illumination light forwards after being reflected by the reflecting cup.

2. The headlight bulb as claimed in claim 1, wherein the exit optical system, the wavelength conversion means (6) and the LED assembly (7) are located on the same line.

3. The automobile headlamp bulb as claimed in claim 1, wherein the bulb body (20) comprises a first mounting portion (1), a second mounting portion (2) and a third mounting portion (3) which are connected in sequence from front to back; the rear end of the third mounting part (3) is connected with the radiator (4); the emission optical system and the wavelength conversion device (6) are mounted on a first mounting part (1); the LED assembly (7) is mounted on the second mounting part (2); the reflectors are respectively arranged on the first installation part (1) and the third installation part (3); the laser (8) is mounted on the third mounting portion (3).

4. The headlamp bulb as claimed in claim 1, further comprising a laser mounting plate (12), wherein the laser (8) is disposed on the laser mounting plate (12); a laser mounting plate (12) is mounted inside the heat sink (4).

5. A headlight bulb for a vehicle according to claim 1, further comprising a fan assembly (5), the fan assembly (5) being mounted at a rear end of the heat sink (4); the fan assembly (5) blows air toward the heat sink (4) to accelerate heat dissipation.

6. A headlight bulb for vehicles as claimed in claim 1, characterized in that the heat sink (4) is integrally formed with the bulb body (20); or the radiator (4) and the bulb body (20) are independently arranged, and the radiator (4) is connected with the bulb body (20) through the heat-conducting glue layer.

7. A headlight bulb for vehicles as claimed in claim 3, further comprising a cover plate (9), a closed channel (13); grooves are formed in the side edges of the cover plate (9) and/or the second mounting part (2); after the cover plate (9) is connected with the second installation part (2), the groove forms the closed channel (13).

8. The headlight bulb as claimed in claim 7, wherein the LED assembly (7) is located between the cover plate (9) and the second mounting portion (2); after the cover plate (9) is connected with the second mounting part (2), the LED assembly (7) is fixedly mounted.

9. The automobile headlamp bulb as claimed in claim 7, characterized by further comprising a light through hole (15), wherein the light through hole (15) is formed on the surface of the cover plate (9) and the surface of the second mounting part (2); the LED assembly (7) emits light from the left side and the right side through the light through holes (15).