CN211345148U - Lamp unit - Google Patents

Abstract

The utility model provides a can carry out the lamps and lanterns unit that the shading is carried out to the light that jets into projection lens without grading control in the light that jets out from light emitting component. The lamp unit (1) is provided with a light-emitting element (22), a substrate (24) on which the light-emitting element (22) is mounted, a cover lens (41) that controls the distribution of light emitted from the light-emitting element (22), and a fixing member (42) that fixes the cover lens (41) to the substrate (24). An opening (42a) for exposing the light distribution control part (41a) of the cover lens (41) is arranged on the fixing member (42), and a wall (42b) is arranged at the periphery of the opening (42a) in a mode of shielding the space between the projection lens (second lens 32) and the light distribution control part (41a) of the cover lens (41) so as to shield a part of the light emitted from the cover lens (41).

Description

Lamp unit

Technical Field

The present invention relates to a lamp unit including a rotating reflector, and more particularly, to a lamp unit including a fixing member capable of blocking a part of light emitted from a cover lens (cover lens).

Background

In recent years, a technique related to a blade scanning system is known in which a rotating reflector having a reflecting surface that rotates around a rotating shaft reflects direct light emitted from a light source unit, thereby projecting a complicated light distribution pattern in front of a lamp. For example, patent document 1 describes a technique for illuminating the front of a vehicle over a wide range using a rotating reflector. Patent document 2 describes a technique for reducing a change in luminance near a light/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 the lamp unit adopting the leaf-scan method, a cover lens is provided for distributing light emitted from the light emitting element toward the reflection surface of the rotating reflector. The cover lens is configured by a transparent member formed integrally, has a light distribution control portion for controlling the direction of light and a leg portion for supporting the light distribution control portion, and is disposed so as to cover the light emitting element.

However, according to the conventional configuration, a part of light incident from the light emitting element leaks from the leg portion of the cover lens and is projected in front of the lamp in a state where the light distribution control is not performed, and there is a possibility that formation of a desired light distribution pattern is hindered. In addition, a part of the light incident from the light emitting element is projected to the front of the lamp without passing through the reflection surface of the rotating reflector, and in this case, a desired light distribution pattern may not be formed.

Therefore, an object of the present invention is to provide a lamp unit capable of blocking light not subjected to light distribution control among light emitted from a cover lens.

Means for solving the problems

In order to solve the above-described problems, the present invention provides a lamp unit including a light emitting element, a substrate on which the light emitting element is mounted, a rotating reflector for rotating a reflection surface for reflecting light of the light emitting element around a rotation axis, a rotating reflector housing for holding the rotating reflector, a projection lens for projecting the light reflected by the reflection surface to the front of the lamp, a lens holder for holding the projection lens, and a support member for supporting the substrate, the rotating reflector and the lens holder, wherein the lamp unit includes a cover lens disposed between the light emitting element and the reflection surface and including a transparent member for transmitting the light emitted from the light emitting element, and a fixing member for fixing the cover lens to the substrate, and the fixing member shields a part of the light emitted from the cover lens.

The cover lens includes a light distribution control portion that projects light emitted from the light emitting element onto a reflection surface of the rotating reflector, and a leg portion that is integrally formed with the light distribution control portion, and when the fixing member includes an opening portion that exposes the light distribution control portion, the fixing member shields light that does not enter the light distribution control portion, of the light emitted from the cover lens.

Further, the fixing member may be configured to include a standing wall that shields a part of light emitted from the light emitting element at least a part of a peripheral edge of the opening. The vertical wall is interposed between the projection lens and the cover lens, and shields light not projected on the rotating reflector, among light emitted from the light emitting element.

Effect of the utility model

According to the present invention, since the uncontrolled light can be shielded by the fixing member of the cover lens, a desired light distribution pattern can be formed, and the lamp unit can be kept small while suppressing an increase in the number of components.

Drawings

Fig. 1 is a sectional view of a vehicle lamp equipped with a lamp unit showing one 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 view of a reflector assembly.

Fig. 5 is a partially enlarged view of the lamp unit of fig. 1, focusing on the fixing member.

Fig. 6 is a perspective view showing a state where the substrate, the light emitting element, and the fixing member are fastened to the support member with screws.

Fig. 7 is a perspective view of the substrate, the light emitting element, and the fixing member shown in fig. 6.

Fig. 8 is a schematic view showing a light shielding effect of the fixing member.

Description of the reference numerals

Vehicle lamp 1

2 Lamp unit

3 first light source unit

4 second light source unit

5 Reflector assembly

6 lens unit

7 support member

8 lens support

9 radiator

11 outer lens

12 Lamp body

13 Lamp chamber

14 projecting member

15 aiming adjustment member

21. 22 light emitting element

23. 24 base plate

25 rotating reflector (25 a: reflecting surface)

26 Motor

27 control circuit board

29 Reflector casing (29 a: vertical wall)

31 first lens

32 second lens (projection lens)

41 cover type lens (41 a: light distribution control part; 41 b: leg part)

42 fixing member (42 a: opening part; 42 b: vertical wall)

L1, L2, L3, L4 light

R rotating shaft

Detailed Description

Hereinafter, a description will be given of an embodiment of the present invention embodied as a lamp unit provided in a vehicle lamp, based on 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 assembly 5, and a lens unit 6. Further, a projecting member 14 for shielding a part of the lamp unit 2 from the front of the lamp is provided inside the lamp chamber 13.

Further, the lamp unit 2 includes a support member 7. The support member 7 supports the first light source unit 3, the second light source unit 4, the reflector assembly 5, and the lens unit 6, and is provided with a heat sink 9 for dissipating heat generated from the first light source unit 3 and the second light source unit 4 behind the mounting surface 7a of the first light source unit 3 and the mounting surface 7b of the second light source unit 4. Further, the support member 7 is held by the aiming adjustment member 15 to the lamp main body 12.

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 assembly 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 lens unit 6 includes a first lens 31, a second lens 32, and a lens holder 8 that holds the first lens 31 and the second lens 32.

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 and light L2 from the second light source unit that enter the second lens 32 are projected in front of the lamp to form a desired light distribution pattern. In order to direct light L1 and reflected light L2 reflected by the rotating reflector toward the second lens 32, the substrates 23, 24 are disposed to be non-parallel.

As shown in fig. 4, the reflector module 5 includes a rotating reflector 25 in which a substantially divided disc-shaped reflecting surface 25a is 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. The motor 26 includes a coil 26a and a yoke 26b that is rotated by energization. A control circuit board 27 is disposed on the outer bottom surface of the reflector housing 29, and a control circuit for controlling the motor 26 is mounted on the control circuit board 27.

As shown in fig. 5 to 7, the second light source unit 4 includes a cover lens 41 through which light from the light emitting element 22 passes and a fixing member 42 for fixing the cover lens 41 to the substrate 24, in addition to the light emitting element 22 and the substrate 24. In addition, the fixing member also has a function of preventing the cover lens 41 from being twisted.

As shown in fig. 5, the cover lens 41 is disposed between the light emitting element 22 and the reflecting surface 25a of the rotating reflector 25. The cover lens 41 is configured by a light distribution control portion 41a that projects light emitted from the light emitting element 22 onto the reflection surface 25a of the rotating reflector 25, and a leg portion 41b that supports the light distribution control portion 41a on the substrate 24, and is integrally formed by a transparent member.

The opening 42a of the fixing member 42 is formed so as to expose the light distribution control portion 41a, and an upright wall 42b is interposed at the periphery of the opening 42a so as to block the gap between the second lens 32 and the cover lens 41.

Fig. 8 is a schematic view showing a light shielding effect of the fixing member. The light emitted from the light emitting element 22 enters the cover lens 41 first. As with the light L2, the light emitted from the light distribution control portion 41a of the cover lens 41 and directed toward the second lens 32 via the reflection surface 25a of the rotating reflector 25 is effective light that is appropriately controlled, and forms a desired light distribution pattern in front of the lamp.

On the other hand, the light L4 emitted from the leg portion 41b of the cover lens 41 and the light L3 emitted from the light distribution controller 41a and directed toward the second lens 32 without passing through the rotating reflector 25 are waste lights that are not controlled, and do not form a desired light distribution pattern. Alternatively, they interfere with formation of a light distribution pattern by the light L2.

Here, the fixing member 42 covers the cover lens 41, exposes the light distribution control portion 41a from the opening 42a, and includes a standing wall 42b at the peripheral edge of the opening 42a, particularly at the side where the second lens 32 is disposed. Therefore, the light L4 is shielded by the fixing member 42, and the light L3 is shielded by the standing wall 42 b. As a result, only the controlled light L2 and the light L1 (see fig. 1) from the first light source unit 3 enter the second lens 32, and a desired light distribution pattern can be projected. The standing wall 42b is preferably set high enough to separate the light distribution control unit 41a from the second lens 32 so that the light emitted from the light distribution control unit 41a does not directly enter the second lens 32.

According to the lamp unit 2 configured as described above, since the light L3 and the light L4 outside the control emitted from the cover lens 41 are shielded by the fixing member 42 and the standing wall provided on the fixing member 42, only the controlled light L2 can be projected. Further, since the fixing member 42, which is a conventional component, is machined and used, there is an effect that the number of components of the lamp unit 2 can be reduced and the size of the lamp unit 2 can be reduced.

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

Claims (5)

1. A lamp unit including a light emitting element, a substrate on which the light emitting element is mounted, a rotating reflector that rotates a reflection surface that reflects light of the light emitting element around a rotation axis, a rotating reflector housing that holds the rotating reflector, a projection lens that projects the light reflected by the reflection surface to the front of a lamp, a lens holder that holds the projection lens, and a support member that supports the substrate, the rotating reflector, and the lens holder,

the lamp unit includes a cover lens disposed between the light emitting element and the reflecting surface and composed of a transparent member for transmitting light emitted from the light emitting element, and a fixing member for fixing the cover lens to the substrate,

the fixing member shields a part of light emitted from the cover lens.

2. The luminaire unit of claim 1,

the cover lens includes a light distribution control portion for projecting light emitted from the light emitting element onto a reflection surface of the rotating reflector, and a leg portion integrally formed with the light distribution control portion,

the fixing member includes an opening portion for exposing the light distribution control portion,

the fixing member blocks light not incident on the light distribution control portion among light emitted from the cover lens.

3. The luminaire unit of claim 2,

the fixing member includes a standing wall that shields a part of light emitted from the light emitting element, at least a part of a periphery of the opening.

4. The luminaire unit of claim 3,

the vertical wall shields light not projected on the rotating reflector from among light emitted from the light emitting element.

5. The luminaire unit of claim 3,

the standing wall is clamped between the projection lens and the cover lens.

Images