CN211345250U

CN211345250U - Lamp unit

Info

Publication number: CN211345250U
Application number: CN201922152674.4U
Authority: CN
Inventors: 村松铁平
Original assignee: Koito Manufacturing Co Ltd
Current assignee: Koito Manufacturing Co Ltd
Priority date: 2018-12-07
Filing date: 2019-12-05
Publication date: 2020-08-25
Anticipated expiration: 2029-12-05
Also published as: JP7321701B2; JP2020092055A

Abstract

The utility model provides a can change the configuration of fan, improve the lamps and lanterns unit of the degree of freedom of part overall arrangement. The lamp unit (1) is provided with a light source unit (4), a lens unit (16) on which a projection lens (32) for projecting light from the light source unit (4) to the front of the lamp is mounted, a heat radiation member (7) for supporting the light source unit (4) and the lens unit (6), and a heat radiation fan (10) for blowing air to the heat radiation member (7). The heat dissipation member (7) comprises a plurality of fins (92) and a plurality of ventilation channels (93) formed between the fins, and a cut-out portion (94) for allowing the wind of the fan (10) to pass in a direction not parallel to the ventilation channels (93) is formed in a part of the fins (92).

Description

Lamp unit

Technical Field

The utility model relates to a can carry out lamps and lanterns unit of change to the configuration of the fan of radiating member air supply.

Background

In recent years, a technology related to a polar-rotation mirror (BladeScan) system is known, in which a rotating reflector that rotates around a rotating shaft is provided to reflect straight light emitted from a light source unit and project a complicated light distribution pattern in front of a lamp. For example, patent document 1 describes a technique for irradiating the front of a vehicle over a wide range with a rotating reflector. Patent document 2 describes a technique of reducing a change in luminance near a bright-dark boundary by overlapping light distribution patterns formed by using a rotating reflector in a staggered manner.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-067523

Patent document 2: japanese patent laid-open publication No. 2018-073485

SUMMERY OF THE UTILITY MODEL

Problem to be solved by the utility model

However, in a lamp unit using a super-speed rotating mirror (BladeScan) system, a heat radiating member is provided, which has a function of supporting components such as a light source unit, a rotating reflector, and a lens in a posture suitable for light distribution control, and radiating heat generated from the unit.

The heat radiating member includes a heat sink for radiating heat, and the heat sink includes a plurality of heat-conducting fins. The heat-conducting fins are disposed to stand substantially in parallel with each other with the ventilation passage therebetween, and when air flows into the ventilation passage, the heat of the fins is dissipated by the flow of the air, and the light source unit is cooled.

However, according to the conventional heat sink, as shown in fig. 11 and 12, it is necessary to dispose the fans at positions where the

fans

10i and 10j can blow air in parallel with the air passage 93, and for example, when the fan is disposed at the position of 10k, the flow of air is blocked by the surface of the fin 92, and air cannot be blown into the air passage 93. Therefore, the position of the fan is fixed, and the overall free layout of the lamp unit is hindered, which makes it difficult to improve the design and reduce the size of the lamp unit.

Therefore, an object of the present invention is to provide a lamp unit capable of sending air into fins even if the arrangement of fans is changed.

Means for solving the problems

In order to solve the above-described problems, a lamp unit according to the present invention includes a light source unit having a light emitting element mounted thereon, a lens unit having a projection lens for projecting light from the light source unit to the front of a lamp, a heat dissipating member for supporting the light source unit and the lens unit, and a fan for blowing air to the heat dissipating member to dissipate heat from the heat dissipating member, wherein the heat dissipating member includes a base portion, a plurality of fins provided upright on the base portion in parallel to each other, and a plurality of ventilation paths formed between the fins, and a cutout portion for allowing air from the fan to pass in a direction not parallel to the ventilation paths is formed in a part of the fins.

The lamp unit further includes a reflector module having a rotating reflector mounted thereon for rotating a reflecting surface for reflecting light from the light emitting element about a rotation axis, and the heat radiation member supports the reflector module such that the light from the light emitting element reflected by the reflecting surface is incident on the projection lens.

In this case, the notch portion may be formed so as to gradually become smaller from the windward side toward the leeward side of the wind direction not parallel to the air passage. The fin is arranged so that its cross section is ハ -shaped, and a notch is provided at the apex of ハ -shaped.

Further, preferably, the lamp unit includes a bracket that supports the fan, and the bracket includes a mounting structure that enables the fan to be selectively mounted in a first posture in which the fan blows in a direction parallel to the air passage and a second posture in which the fan blows in a direction not parallel to the air passage.

Effect of the utility model

According to the utility model discloses a lamp unit owing to set up the incision at the fin, consequently can send into the wind of fan to the ventilation route through the incision to have the excellent effect that improves the configuration degree of freedom of fan.

Drawings

Fig. 1 is a sectional view of a vehicle lamp equipped with a lamp unit showing an embodiment of the present invention.

Fig. 2 is a perspective view of the lamp unit of fig. 1.

Fig. 3 is an expanded perspective view of the lamp unit of fig. 2 after expansion.

Fig. 4 is a schematic diagram of a reflector module.

Fig. 5 (a) is a bottom view of the lamp unit, and fig. 5 (b) is a perspective view of the heat sink as viewed from the bottom surface of the lamp unit.

Fig. 6 (a) is a sectional view a-a of the lamp unit of fig. 5 viewed from the side direction, and fig. 6 (B) is a sectional view B-B of the lamp unit of fig. 5 viewed from the rear direction.

Fig. 7 shows a modification of the heat sink. Suffix 1 is bottom view, suffix 2 is a sectional view a-a, and suffix 3 is a sectional view B-B.

Fig. 8 shows a modification of the heat sink. Suffix 1 is bottom view, suffix 2 is a sectional view a-a, and suffix 3 is a sectional view B-B.

Fig. 9 shows a modification of the heat sink. Suffix 1 is bottom view, suffix 2 is a sectional view a-a, and suffix 3 is a sectional view B-B.

Fig. 10 shows a fan mounting structure.

Fig. 11 (a) is a bottom view of the conventional lamp unit, and fig. 11 (b) is a perspective view of the heat sink as viewed from the bottom surface of the lamp unit.

Fig. 12 (a) is a sectional view a-a of the lamp unit of fig. 11 viewed from the side, and fig. 12 (B) is a sectional view B-B of the lamp unit of fig. 11 viewed from the rear.

Description of the reference numerals

1: a vehicular lamp; 2: a lamp unit; 3: a first light source unit; 4: a second light source unit; 5: a reflector module; 6: a lens unit; 7: a heat dissipating member; 8: a lens holder; 9: a heat sink; 10: a fan; 11: an outer lens; 12: a lamp body; 13: a lamp chamber; 14: an extension member; 15: an aiming adjustment member; 21. 22: a light emitting element; 23. 24: a substrate; 25: a rotating reflector; 26: a motor; 27: a control circuit substrate; 29: a reflector box; 31: a first lens; 32: a second lens (projection lens); 91: a base part; 92: a fin; 93: an air passage; 94: a cut-out portion; l: a light; r: a rotating shaft.

Detailed Description

Hereinafter, embodiments of a lamp unit incorporated in a vehicle lamp according to the present invention will be described with reference to the drawings. In the drawings, the same reference numerals denote the same or similar components.

As shown in fig. 1 to 3, the lamp unit 2 of the present embodiment is disposed inside a lamp chamber 13 formed between an outer lens 11 and a lamp body 12 of the vehicular lamp 1. The lamp unit 2 is constituted by a first light source unit 3, a second light source unit 4, a reflector module 5, and a lens unit 6. Further, an extension 14 that shields a part of the lamp unit 2 from the front of the lamp is provided inside the lamp chamber 13.

The lamp unit 2 includes a heat radiating member 7 and a fan 10 that blows air to the heat radiating member 7. The heat radiation member 7 supports the first light source unit 3, the second light source unit 4, the reflector module 5, and the lens unit 6, and includes a heat sink 9 for radiating heat generated from the lamp unit 2, mainly the first light source unit 3 and the second light source unit 4, behind the

mounting surfaces

7a and 7b of the first light source unit 3 and the second light source unit 4. The heat radiation member 7 is held by the lamp main body 12 by the aiming adjustment member 15.

The first light source unit 3 includes a light emitting element 21 and a substrate 23 on which the light emitting element 21 is mounted, and the second light source unit 4 includes a light emitting element 22 and a substrate 24 on which the light emitting element 22 is mounted. The reflector module 5 includes a rotating reflector 25 that rotates about a rotation axis R, a reflector housing 29 that holds the rotating reflector 25, and a motor 26 that drives the rotating reflector 25.

The light L1 emitted from the light emitting element 21 passes through the first lens 31 and enters the second lens 32. On the other hand, the light L2 emitted from the second light source unit 4 is reflected by the reflection surface 25a of the rotating reflector 25 and enters the second lens 32. Light L1 from the first light source unit 1 and light L2 from the second light source unit 2 that enter the second lens 32 are projected in front of the lamp to form a desired light distribution pattern. The

substrates

23 and 24 are arranged so as not to be parallel to each other so that both the light L1 as direct light and the light L2 as reflected light passing through the rotating reflector are directed to the second lens 32.

Next, the reflector module 5 will be explained in detail. As shown in fig. 4, the reflector module 5 includes a rotating reflector 25 having a substantially divided disc-shaped reflecting surface 25a provided to be rotatable about a rotation axis R, a motor 26 for driving the rotating reflector 25, and a reflector housing 29 for holding the rotating reflector 25. The reflector housing 29 includes a standing wall 29b surrounding the outer periphery of the rotating reflector 25.

As shown in fig. 4 (b), the rotating reflector 25 is connected to a rotating shaft R at the center, and the rotating shaft R is connected to the motor 26 through a hole 29a opened in the bottom surface of the reflector housing 29. Further, the motor 26 includes a coil 26a and a yoke 26b that rotates by energization. A control circuit board 27 on which a control circuit for controlling the motor 26 is mounted is disposed on the outer bottom surface of the reflector housing 29.

Next, the heat sink 9 provided in the heat radiation member 7 will be described in detail with reference to fig. 5 to 10. As shown in fig. 5 and 6, the heat sink 9 includes a base portion 91, a plurality of heat-conducting fins 92 erected in parallel on the base portion 91, and a plurality of ventilation passages 93 formed between the fins.

Fans

10i and 10 blowing wind of an airflow parallel to the air passage 93, or a fan 10k blowing wind of an airflow not parallel to the air passage 93 may be disposed in the vicinity of the heat sink 9.

Here, the fin 92 is provided with a notch 94 through which wind flowing in a direction not parallel to the air passage 93 passes. In fig. 6, the hatched portion indicates the remaining portion of the fin 92, and the unshaded portion indicates the cutout portion 94. The notch 94 is provided so as to become gradually smaller from the windward side toward the leeward side of the fan 10 k. Therefore, the wind from the fan 10k enters the ventilation passage 93 through the notch 94, and the heat of the fins 92 is dissipated. In this way, even if the fan is disposed at any position among the

fans

10i, 10j, and 10k, air can be fed into the ventilation passage 93, and heat of the fins 92 can be dissipated.

Fig. 7 to 9 show a modification of the heat sink 9. In fig. 7 to 9, the hatched portion also indicates the remaining portion of the fin 92, and the unshaded portion also indicates the cutout portion 94. In fig. 7 and 8, the area of each fin 92 is set to be smaller from the windward side toward the leeward side of the fan 10k, and the wind of the fan 10k is drawn in step by step. In fig. 9, the fin 92 is formed in a substantially ハ shape in cross section a-a, and a gap or a notch 94 is provided at a substantially ハ -shaped apex. In this case, since the apex portion of the substantially ハ shape is disposed toward the windward side of the fan 10k, the wind from the fan 10k can be guided more smoothly to the air passage 93 along the surface of the fin 92.

As shown in fig. 10,

fans

10i, 10j, and 10k are supported by lamp unit 2 via bracket 16. The bracket 16 has the following mounting structure: the

fans

10i, 10j having a first posture blowing air in a direction parallel to the air passage 93 and the fan 10k having a second posture blowing air in a direction not parallel to the air passage 93 can be selectively mounted.

According to the lamp unit 2 configured as described above, since the cutout portion 94 is provided in the fin 92, the air from the fan 10k blowing in the direction not parallel to the air passage 93 of the fin 92 can be sucked and guided to the air passage 93. Further, since the notch 94 is formed to be gradually smaller from the windward side toward the leeward side of the fan 10k, the wind can be more uniformly sucked from the windward air passage to the leeward air passage. Therefore, the degree of freedom in the fan arrangement is improved, and the fan arrangement can be changed in accordance with the vehicle lighting and the vehicle layout.

The present invention is not limited to the above-described embodiments, and the present invention can be implemented by appropriately changing the shape and structure of each part without departing from the scope of the present invention.

Claims

1. A lamp unit including a light source unit having a light emitting element mounted thereon, a lens unit having a projection lens for projecting light from the light source unit to the front of a lamp, a heat dissipating member for supporting the light source unit and the lens unit, and a fan for blowing air to the heat dissipating member to dissipate heat of the heat dissipating member,

the heat dissipation member includes a base portion, a plurality of fins provided upright on the base portion in parallel with each other, and a plurality of ventilation paths formed between the fins,

a cutout portion through which the wind of the fan passes in a direction not parallel to the ventilation path is formed in a part of the fin.

2. The luminaire unit of claim 1,

the lamp unit includes a reflector module having a rotating reflector mounted thereon for rotating a reflecting surface for reflecting light from the light emitting element around a rotating axis,

the heat dissipation member supports the reflector module such that light of the light emitting element reflected by the reflection surface is incident on the projection lens.

3. The lamp unit according to claim 1 or 2, wherein the cutout portion is provided so as to become gradually smaller from an upwind side toward a downwind side of a wind direction that is not parallel to the ventilation path.

4. The lamp unit according to claim 1 or 2, wherein the fin is arranged such that a cross section of the fin is formed in an ハ shape, and the cut-out portion is provided at an apex portion of the ハ shape.

5. Lamp unit according to claim 1 or 2,

the lamp unit is provided with a bracket for supporting the fan,

the bracket includes a mounting structure capable of selectively mounting the fan in a first posture in which air is blown in a direction parallel to the air passage and in a second posture in which air is blown in a direction not parallel to the air passage.