JP2014154410A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture that is made attractive in terms of design when lighting up without affecting formation of a light distribution pattern.SOLUTION: A vehicular lighting fixture 1 includes an LED 4 which emits light forward; a projection lens 5 which is arranged before the LED 4 and irradiates the front with the light emitted by the LED 4; and two light guides 6, 6 which are arranged on both upper and lower sides of the projection lens 5. Each light guide 6 has an incidence surface 61 opposed to a peripheral edge part of the front of the projection lens 5, so that light emitted from the peripheral edge part of the front of the projection lens 5 is made to enter the light guide 6 from the incidence surface 61 and to exit from the front while being guided.

Description

  The present invention relates to a vehicular lamp.

  2. Description of the Related Art Conventionally, as various vehicle lamps mounted on a vehicle, as shown in FIG. 5, a direct projection type that irradiates light emitted from an LED (light emitting diode) forward by a projection lens is known. In this direct projection type vehicular lamp, of the light emitted substantially radially from the LED, the extra light that would otherwise be emitted from the peripheral edge of the projection lens to the outside of the light distribution pattern is shaded (shading member). Therefore, the light is blocked before entering the projection lens (for example, see Patent Document 1).

JP 2011-187305 A

  However, in the above conventional direct projection type vehicular lamp, only the central part (the part inside the peripheral part) of the front surface of the projection lens emits a uniform light, and the appearance at the time of lighting is improved. The design was poor. Changing the shape of the projection lens, which is the light emitting section, can change the appearance when the lamp is turned on. However, changing the shape of the projection lens is not preferable because it may hinder the formation of a desired light distribution pattern.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a vehicular lamp capable of making the appearance at lighting excellent in design without affecting the formation of a light distribution pattern. To do.

In order to solve the above problems, the invention according to claim 1 is a vehicle lamp,
LEDs that emit light forward,
A projection lens disposed in front of the LED and irradiating the light emitted from the LED forward;
A light guide disposed on the side of the projection lens;
With
The light guide has an incident surface facing a peripheral portion of the front surface of the projection lens, and allows light emitted from the peripheral portion of the front surface of the projection lens to enter the light guide body from the incident surface. The light is emitted from the front while being guided.

The invention according to claim 2 is the vehicle lamp according to claim 1,
Comprising a shade disposed between the LED and the projection lens;
Of the light emitted from the LED, the shade emits from a central portion of the front surface of the projection lens to form a predetermined light distribution pattern, and emits from a peripheral portion of the front surface of the projection lens It is characterized by shielding light except for light incident on the light guide.

The invention according to claim 3 is the vehicle lamp according to claim 1 or 2,
A plurality of lens cuts are formed on the rear surface of the light guide so as to guide light incident on the light guide from the incident surface and reflect the light forward.

Invention of Claim 4 is a vehicle lamp as described in any one of Claims 1-3,
The vehicular lamp is a fog lamp.

  According to the present invention, among the light emitted from the LED and incident on the projection lens, the light emitted from the peripheral edge of the front surface of the projection lens enters the light guide from the incident surface of the light guide and guides the light. After being emitted, the light is emitted from the front surface. As a result, by using the light emitted from the peripheral edge of the front surface of the projection lens that does not contribute to the formation of the light distribution pattern, that is, the light that was conventionally shielded before entering the projection lens, It is possible to emit light from the front surface of the light guide disposed in the. Therefore, compared to the conventional case where only the central part (the part inside the peripheral part) of the front surface of the projection lens emits light, the appearance at lighting is excellent in design without affecting the formation of the light distribution pattern. Can be.

It is a front view of the vehicular lamp in an embodiment. It is sectional drawing in the II-II line of FIG. It is sectional drawing in the III-III line of FIG. It is sectional drawing in the IV-IV line of FIG. It is a longitudinal cross-sectional view of the conventional vehicle lamp.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a vehicular lamp 1 according to this embodiment, and FIGS. 2 to 4 are cross-sectional views taken along lines II-II to IV-IV in FIG.
In the following description, “front”, “rear”, “left”, “right”, “upper”, and “lower” refer to the direction viewed from the vehicular lamp 1 unless otherwise specified. .

  As shown in FIGS. 1 to 4, the vehicular lamp 1 is a fog lamp mounted on a vehicle (not shown). The vehicular lamp 1 includes a housing 2 having a front opening and a transparent outer lens 3 covering the front opening of the housing 2. I have. The outer lens 3 has a central portion in a front view and a portion extending slightly upward and downward from the central portion, and protrudes forward from the other portions. It is exposed from the opening Bh formed in the front.

An LED (light emitting diode) 4, a projection lens 5, two light guides 6 and 6, and a shade 7 are accommodated in a lamp chamber defined by the housing 2 and the outer lens 3. .
Among these, LED4 is mounted in the front surface of the board | substrate 41 in the state which orient | assigned the light emission surface to the front, and is arrange | positioned at the front view substantially center part in the lamp chamber. The substrate 41 is fixed to the front surface of the heat sink 42 having a plurality of radiating fins 421,... On the rear surface, and is electrically connected to the lighting circuit unit 43 disposed behind the heat sink 42.

  The projection lens 5 is an aspherical convex lens having a convex exit surface (front surface). The projection lens 5 has two legs 51 and 51 extending rearward from the left and right sides. When the projection lens 5 is disposed in front of the LED 4, the projection lens 5 is attached to the heat sink 42 by the two legs 51 and 51. It is fixed. The projection lens 5 has a focal point located in the vicinity of the LED 4 and irradiates light emitted from the LED 4 forward. The projection lens 5 is exposed forward from the opening Bh of the vehicle body B via the outer lens 3.

  The two light guides 6 and 6 are each formed in a long plate shape that is slightly curved so as to warp backward, and extend substantially along the vertical direction while inclining slightly to the right, and in front. They are arranged above and below the projection lens 5 so as to be positioned on the same straight line as viewed. These two light guides 6 and 6 are exposed forward from the opening Bh of the vehicle body B through the outer lens 3.

  Each light guide 6 is fixed to the housing 2 at one end far from the projection lens 5 out of both ends in the vertical direction, while the projection lens 5 is located at the other end near the projection lens 5. An incident surface 61 for allowing a part of the light emitted from the light to enter the light guide 6 is formed. The incident surface 61 is formed in a curved surface that faces obliquely rearward along the peripheral edge of the front surface of the projection lens 5 and is in contact with the peripheral edge of the front surface of the projection lens 5.

  Further, on the rear surface of each light guide 6, a plurality of lens cuts 62,... Having a sawtooth cross section arranged side by side along the longitudinal direction of the light guide 6 are formed over substantially the entire surface. The plurality of lens cuts 62,... Reflect the light that has entered the light guide 6 from the incident surface 61 forward along the longitudinal direction of the light guide 6.

  The shade 7 is formed in a thin flat plate shape that is substantially orthogonal to the front-rear direction, and a light transmission hole 7a is formed in a substantially central portion thereof. The shade 7 has two legs 71 and 71 extending rearward from the left and right sides, and the two legs 71 and 71 are disposed between the LED 4 and the projection lens 5. It is being fixed to the heat sink 42 by. As will be described later, the shade 7 emits light emitted from the LED 4 from the central portion of the front surface of the projection lens 5 to form a predetermined light distribution pattern, and both upper and lower sides of the front surface of the projection lens 5. The light that exits from the peripheral edge of the light and enters the two light guides 6 and 6 is allowed to pass forward through the light hole 7a, and other light is shielded. In other words, the shade 7 is different from the conventional shade (light shielding member) that shields all light other than the light incident on the central portion (portion inside the peripheral portion) of the projection lens 5. The light-transmitting hole 7a is enlarged by the amount that allows the light incident on the upper and lower peripheral edges to pass.

Then, the light emission aspect of the vehicle lamp 1 is demonstrated.
In the vehicular lamp 1, as shown in FIG. 2, when the LED 4 is turned on, the light emitted forward from the LED 4 that has passed through the light transmitting hole 7a of the shade 7 is incident on the incident surface ( Incident on the rear surface.

  Of the light that has entered the projection lens 5, light that exits forward from the center (front side of the peripheral edge) of the projection lens 5 is transmitted through the outer lens 3 and irradiated forward, and is predetermined. The light distribution pattern is formed.

On the other hand, among the light incident on the projection lens 5, light that is emitted forward from the peripheral portions on the upper and lower sides of the front surface of the projection lens 5 from the incident surface 61 of each light guide 6 in contact with the peripheral portion. The light enters the respective light guides 6. The light that has entered the light guide 6 is reflected along the longitudinal direction by a plurality of lens cuts 62 formed on the rear surface of the light guide 6, reflected forward, and emitted forward from the front. . Then, the light passes through the outer lens 3 and is irradiated forward.
Thus, the central portion of the front surface of the projection lens 5 and the front surfaces of the two light guides 6 and 6 on both the upper and lower sides emit light.

  As described above, according to the vehicular lamp 1 of the present embodiment, among the light emitted from the LED 4 and incident on the projection lens 5, light emitted from the peripheral edge of the front surface of the projection lens 5 is each light guide. 6 enters the light guide 6 from the incident surface 61 and is guided, and then exits from the front surface. Accordingly, the light emitted from the peripheral edge of the front surface of the projection lens 5 that does not contribute to the formation of the light distribution pattern, that is, light that has been shielded before entering the projection lens in the conventional case, is used. The front surfaces of the two light guides 6 and 6 arranged on both the upper and lower sides can be made to emit light. Therefore, as compared with the conventional case where only the central portion (the portion inside the peripheral portion) of the front surface of the projection lens emits light, it does not affect the formation of the light distribution pattern and requires a new light source. In addition, the appearance at the time of lighting can be made excellent in design.

  The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

  For example, in the above embodiment, the fog lamp is described as an example of the vehicle lamp according to the present invention. However, the present invention is widely applicable to vehicle lamps other than the fog lamp as long as it is a direct projection type vehicle lamp. Is possible.

  Moreover, the light guide 6 should just be arrange | positioned at the side (projection lens 5 surrounding side seeing from the front) of the projection lens 5, and is not limited to what is arrange | positioned above or below the projection lens 5. FIG. . Of course, the quantity and shape of the light guide 6 are not limited. Therefore, the arrangement, quantity, shape, and the like of the light guide 6 can be appropriately changed according to a desired light emitting design.

  Further, the incident surface 61 of the light guide 6 is opposed to the peripheral portion of the front surface of the projection lens 5 so that the light emitted from the peripheral portion of the front surface of the projection lens 5 is appropriately incident on the incident surface 61. Need not be in contact.

1 Vehicle lamp 3 Outer lens 4 LED
5 Projection Lens 6 Light Guide 61 Incident Surface 62 Lens Cut 7 Shade 7a Light-Transmission Hole B Car Body Bh Opening

Claims (4)

LEDs that emit light forward,
A projection lens disposed in front of the LED and irradiating the light emitted from the LED forward;
A light guide disposed on the side of the projection lens;
With
The light guide has an incident surface facing a peripheral portion of the front surface of the projection lens, and allows light emitted from the peripheral portion of the front surface of the projection lens to enter the light guide body from the incident surface. A vehicle lamp characterized by being emitted from the front while being guided. Comprising a shade disposed between the LED and the projection lens;
Of the light emitted from the LED, the shade emits from a central portion of the front surface of the projection lens to form a predetermined light distribution pattern, and emits from a peripheral portion of the front surface of the projection lens The vehicular lamp according to claim 1, wherein light other than light entering the light guide is shielded.   The lens guide according to claim 1 or 2, wherein a plurality of lens cuts are formed on a rear surface of the light guide so as to guide light incident on the light guide from the incident surface and reflect the light forward. The vehicle lamp as described.   The vehicular lamp according to any one of claims 1 to 3, wherein the vehicular lamp is a fog lamp.

Images