JP6894225B2 - Vehicle lighting - Google Patents

Description

The present invention relates to a vehicle lamp.

Conventionally, as a vehicle lamp mounted on a vehicle, a combination of a light source such as a light emitting diode (LED) and a light guide body has been known (see, for example, Patent Document 1 below). In vehicle lighting equipment, the light emitted from the light source is incident from one end surface (incident surface) of the light guide body, and while repeating reflection inside the light guide body, the light is guided toward the other end surface of the light guide body. By causing the light to emit light, a light emitting portion (light emitting surface) provided on the front surface of the light guide body is made to emit light. Such vehicle lamps are used, for example, in vehicle tail lamps.

Japanese Patent No. 5721367

By the way, in Patent Document 1 below, an uneven lance hole is provided in a tongue-shaped extending portion extending rearward from a line-shaped light guide body, and an engaging portion provided in a light guide body mounting portion is provided. In a vehicle lamp in which a linear light guide body is fixed to a light guide body attachment portion by engaging the concave-convex lance with the concave-convex lance hole, the width of the extending portion has a tapered shape that becomes narrower toward the tip side. Further, a configuration is disclosed in which at least the root side of the side edge portion of the extending portion has a reverse taper shape.

In the case of this configuration, the light guided to the extending portion is emitted to the rear of the light guide at the base of the side edge, or is reflected at the inner surface of the root and emitted to the rear of the light guide. Therefore, it is possible to prevent the generation of leaked light from the front of the light guide body.

However, when the light guided to the extending portion is reflected by the uneven lance hole or the surface on which the taper is not formed, the leaked light emitted toward the front of the light guide body is generated, and this leaked light is generated. There is a problem that only the area corresponding to the place where the light is generated appears to shine stronger than the surroundings, that is, the so-called shining causes the appearance of the vehicle lamp to be deteriorated when it is lit.

The present invention has been proposed in view of such conventional circumstances, and an object of the present invention is to provide a vehicle lamp capable of preventing deterioration of appearance due to lighting.

In order to achieve the above object, the present invention provides the following means.
[1] Light source and
A light guide body that guides the light emitted from the light source, and
It is provided with a light guide body mounting portion to which the light guide body is mounted.
The light emitted from the light source is incident on one end surface of the light guide body, and is repeatedly reflected inside the light guide body to guide the light toward the other end surface of the light guide body. A vehicle lamp that emits light from a light emitting unit provided on the front surface of the light guide.
The light guide has a shape curved from the inside to the outside in the vehicle width direction in accordance with the slant shape provided to the front end or the rear end side corner portion of the vehicle.
Moreover, it has an extending portion extending rearward from a position along the curved shape of the light guide body and a locking hole provided in the extending portion.
The light guide body mounting portion has a locking protrusion protruding from a mounting surface facing the extending portion.
Further, by sliding the extending portion in the mounting direction of the light guide body while facing the mounting surface, the locking protrusion is locked to the locking hole at the mounting position of the light guide body. Has a structure that is
The locking holes are formed on the first end face and the second end face that face each other in parallel in the mounting direction of the light guide body.
A third end surface that connects the first end surface and the second end surface and is located on the front side with respect to the traveling direction of light that is guided from one end surface to the other end surface of the light guide body. When,
It has a fourth end face that connects the first end face and the second end face and is located on the opposite side of the third end face.
The third end face is inclined in a direction in which light incident on the third end face is reflected at an angle equal to or greater than a critical angle with respect to the tangential direction of the front surface of the light guide body. Lighting equipment.
[2] The third end face is inclined in a direction substantially parallel to the tangential direction of the front surface along the curved shape of the light guide body, according to the above [1]. Vehicle lighting equipment.
[3] A plurality of the locking holes and the locking protrusions are provided side by side in the traveling direction of the light guided from one end surface to the other end surface of the light guide body.
The plurality of locking holes are characterized in that the inclination angle of the third end surface with respect to the mounting direction of the light guide body is different along the curved shape of the light guide body [1]. Or the vehicle lighting equipment according to [2].
[4] the extending portion is to have a rear end surface shape inclined in the direction of reflection at an angle equal to or greater than the critical angle of the light incident on the end face with respect to the tangential direction of the front surface of the light guide body The vehicle lighting equipment according to any one of the above [1] to [3].
[5] An extension that covers at least the front surface on the upper side of the upper end surface of the light guide body is provided.
The extending portion extends rearward from the upper end surface of the light guide body and has an upper extending portion located above the upper end surface of the light guide body via a step portion.
The vehicle lamp according to any one of the above [1] to [4], wherein the locking hole is provided in the upper extending portion.

As described above, according to the present invention, it is possible to provide a vehicle lamp that can prevent deterioration of appearance due to lighting.

It is a top view which shows the structure of the lamp for vehicles which concerns on one Embodiment of this invention. It is a front view which shows the structure of the vehicle lamp shown in FIG. FIG. 2 is a cross-sectional view taken along the line segment AA of the vehicle lamp shown in FIG. It is a top view which shows the enclosed part B of the vehicle lamp shown in FIG. 1 in an enlarged manner. It is a top view which shows the enclosed part C of the vehicle lamp shown in FIG. 1 in an enlarged manner. FIG. 5 is an enlarged plan view showing an enclosed portion B in a modified example of the vehicle lamp shown in FIG. 1. FIG. 5 is an enlarged plan view showing an enclosed portion C in a modified example of the vehicle lamp shown in FIG. 1.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the drawings used in the following description, in order to make each component easier to see, the scale of the dimensions may be different depending on the component, and the dimensional ratio of each component is not always the same as the actual one. Absent.

As an embodiment of the present invention, for example, the vehicle lamp 1 shown in FIGS. 1 to 5 will be described. Note that FIG. 1 is a plan view showing the configuration of the vehicle lamp 1. FIG. 2 is a front view showing the configuration of the vehicle lamp 1. FIG. 3 is a cross-sectional view taken along the line segment AA of the vehicle lamp 1 shown in FIG. FIG. 4 is an enlarged plan view showing an enclosed portion B of the vehicle lamp 1 shown in FIG. 1. FIG. 5 is an enlarged plan view showing the enclosed portion C of the vehicle lamp 1 shown in FIG. 1.

Further, in the drawings shown below, the XYZ Cartesian coordinate system is set, the X-axis direction is the front-rear direction (length direction) of the vehicle lighting equipment, the Y-axis direction is the left-right direction (width direction) of the vehicle lighting equipment, and the Z-axis direction. Is shown as the vertical direction (height direction) of the vehicle lighting tool 1.

The vehicle lighting tool 1 of the present embodiment is, for example, a tail lamp (tail light) mounted on both corners (the corner on the left rear end side in the present embodiment) on the rear end side of the vehicle (not shown). The invention is applied. In the following explanation, the descriptions "front", "rear", "left", "right", "top", and "bottom" are used when the vehicle lamp 1 is viewed from the front (rear of the vehicle) unless otherwise specified. It shall mean each direction of. Therefore, the directions when the vehicle is viewed from the front (front of the vehicle) are the directions in which the front, rear, left, and right are reversed.

Specifically, the vehicle lamp 1 includes a light source 2, a light guide body 3 for guiding the light L emitted from the light source 2, a light guide body mounting portion 4 to which the light guide body 3 is attached, and a light guide. It is roughly provided with an extension 5 that covers the front surface side of the body 3. The light source 2, the light guide body 3, the light guide body mounting portion 4, and the extension 5 are housed inside a lamp body (not shown) constituting the vehicle lamp tool 1, and are housed on the left rear end side of the vehicle. It is located in the corner of.

The light source 2 includes, for example, a chip LED (SMD LED) that emits red light (hereinafter, simply referred to as light) L. Further, as the chip LED, a high output (high brightness) type for vehicle lighting is used. The light source 2 emits light L radially toward the light guide body 3.

The light guide body 3 is a rod-shaped light transmitting member arranged in front of the light source 2 as an inner lens of the vehicle lamp 1. As the light guide body 3, a material having a refractive index higher than that of air, such as transparent resin such as polycarbonate or acrylic or glass, can be used.

In the vehicle lamp 1, the light L emitted from the light source 2 is incident on one end surface 3a of the light guide body 3, and is repeatedly reflected inside the light guide body 3 toward the other end surface 3b of the light guide body 3. By guiding the light L, the light emitting unit 6 provided on the front surface 3c of the light guide body 3 is made to emit light.

The light emitting unit 6 is provided with a plurality of reflection cuts (not shown) on the rear surface 3d of the light guide body 3, and emits the light L reflected by these plurality of reflection cuts from the front surface 3c of the light guide body 3. Consists of a light emitting surface D that emits light. The plurality of reflection cuts may be any one that reflects the light L incident on the rear surface 3d of the light guide body 3 at an angle less than the critical angle with respect to the front surface 3c of the light guide body 3, and its shape and size. The number and the like are not particularly limited.

The light guide body 3 has a shape curved from the inside to the outside in the vehicle width direction (Y-axis direction) in accordance with the slant shape provided to the corner portion on the rear end side of the vehicle. Further, the light guide body 3 has an extending portion 7 extending rearward from the upper end surface of the light guide body 3.

The extending portion 7 extends rearward from a position along the curved shape of the light guide body 3, and extends upward from the upper end surface of the light guide body 3 via the step portion 7a. It has a protrusion 7b.

The extending portion 7 is provided with a plurality of (three in this embodiment) locking holes 8A, 8B, and 8C. The plurality of locking holes 8A, 8B, 8C are provided side by side in the traveling direction E of the light L guided from the one end surface 3a to the other end surface 3b of the light guide body 3. Further, the locking holes 8A, 8B, and 8C are provided so as to be located at the upper extending portion 7b.

The first end faces 8a of the locking holes 8A, 8B, 8C are parallel to each other in the mounting direction of the light guide 3 (in the present embodiment, the direction from the rear of the vehicle to the front of the vehicle (-X-axis direction)) Y. And the traveling direction E of the light L that connects the second end surface 8b, the first end surface 8a, and the second end surface 8b and is guided from one end surface 3a to the other end surface 3b of the light guide body 3. A third end face 8c located on the front side with respect to a third end face 8c connecting between the first end face 8a and the second end face 8b and a fourth end face 8d located on the opposite side of the third end face 8c. have.

Of these, the third end faces 8c of the locking holes 8B and 8C are in directions substantially parallel to the direction along the curved shape of the light guide body 3 (tangential direction with respect to the front surface 3c of the light guide body 3), respectively. It is inclined to. That is, the third end faces 8c of the locking holes 8B and 8C are in the direction of reflecting the light L incident on the respective third end faces 8c at an angle equal to or higher than the critical angle with respect to the front surface 3c of the light guide body 3. It is inclined.

Further, the plurality of locking holes 8A, 8B, 8C have different angles of inclination of the third end surface 8c with respect to the mounting direction F of the light guide body 3 along the curved shape of the light guide body 3. However, the third end surface 8c of the locking hole 8A is parallel to the mounting direction F of the light guide body 3.

That is, the locking hole 8A located on the foremost side with respect to the traveling direction E of the light L guided from the one end surface 3a to the other end surface 3b of the light guide body 3 is the other locking hole 8B. Unlike 8C, the third end surface 8c is not inclined in a direction substantially parallel to the direction along the curved shape of the light guide body 3, and is parallel to the mounting direction F of the light guide body 3. It has become.

In the locking hole 8A, even if the third end surface 8c is parallel to the mounting direction F of the light guide body 3, the third end surface is not angled with respect to the traveling direction E of the light L. It is possible to reflect the light L incident on the 8c with respect to the front surface 3c of the light guide body 3 at an angle equal to or higher than the critical angle.

The fourth end face 8d is parallel to the mounting direction F of the light guide body 3 and is orthogonal to the first end face 8a and the second end face 8b. Therefore, of the plurality of locking holes 8A, 8B, 8C, the locking holes 8A have a square shape in a plan view, and the locking holes 8B, 8C have a trapezoidal shape in a plan view.

The light guide body mounting portion 4 has a plurality of (three in the present embodiment) locking protrusions 9A, which are projected from the upper surface (hereinafter, referred to as a mounting surface) 4a of a member constituting the back surface side of the light guide body 3. It has 9B and 9C. The plurality of locking protrusions 9A, 9B, 9C are provided corresponding to the respective positions of the plurality of locking holes 8A, 8B, 8C, respectively. Further, each of the locking protrusions 9A, 9B, and 9C has a rectangular shape in a plan view and has a shape inclined along the mounting direction F of the light guide body 3 in a cross-sectional view.

In the vehicle lamp 1, the extending portion 7 is slid in the mounting direction F of the light guide body 3 while facing the mounting surface 4a, so that the locking protrusions 9A and 9B are positioned at the mounting position of the light guide body 3. , 9C have a structure in which they are locked in the respective locking holes 8A, 8B, 8C.

The extension 5 is made of a black resin molded body having a light-shielding property. The extension 5 has an opening 5a for facing the light emitting surface D provided on the front surface 3c of the light guide body 3 to the outside (front). Further, the extension 5 is configured to cover at least the front surface on the upper side of the upper end surface of the light guide body 3.

In the vehicle lamp 1 of the present embodiment having the above configuration, the light L incident on the third end surface 8c of the third locking holes 8B and 8C has a critical angle with respect to the front surface 3c of the light guide body 3. It is reflected at the above angles. As a result, the light L reflected by the third end surface 8c is reflected by the front surface 3c of the light guide body 3, and the inside of the light guide body 3 is guided from one end surface 3a to the other end surface 3b. become.

It is preferable that the extending portion 7 has an end face shape inclined in a direction in which the light L incident on the rear end face 7c is reflected at an angle equal to or higher than the critical angle with respect to the front surface 3c of the light guide body 3. As a result, the light L reflected by the rear end surface 7c of the extending portion 7 is reflected by the front surface 3c of the light guide body 3, and the inside of the light guide body 3 is directed from one end surface 3a to the other end surface 3b. It will be guided.

As described above, in the vehicle lamp 1 of the present embodiment, it is possible to prevent the generation of leaked light from the front surface 3c of the light guide body 3 and prevent the deterioration of the appearance due to the conventional spotlight. ..

Further, in the vehicle lamp 1 of the present embodiment, the extension 5 covers the front surface on the upper side of the upper end surface of the light guide body 3, so that the extension 5 is located above the upper end surface of the light guide body 3 and extends upward. The front side of the portion 7b is shielded from light. As a result, even when the light reflected by the end faces 8a, 8b, 8d other than the third end faces 8c of the locking holes 8A, 8B, 8C is emitted from the front surface 3c of the light guide body 3, this light is extended. It is possible to block light by 5. Further, in the vehicle lighting tool 1, it is possible to eliminate the change in appearance when the lamp is lit and when the lamp is not lit.

The present invention is not necessarily limited to that of the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
Specifically, in the vehicle lamp 1, the third end faces 8c of the locking holes 8B and 8C shown in FIGS. 4 and 5 described above are directed in directions along the curved shape of the light guide body 3, respectively. The configuration is inclined in a direction that is substantially parallel, but the third end surface 8c follows the curved shape of the light guide body 3, as in the locking holes 8B and 8C shown in FIGS. 6 and 7, for example. The configuration may be inclined in a direction substantially orthogonal to the direction.

In the case of this configuration, the light L incident on the third end surface 8c is transmitted toward the rear of the light guide body 3. Therefore, also in this case, it is possible to prevent the generation of leaked light from the front surface 3c of the light guide body 3 and prevent the deterioration of the appearance due to the conventional spotlight.

Further, in the case of this configuration, it is preferable that the extending portion 7 has an end face shape inclined in a direction in which the light L incident on the rear end face 7c is transmitted toward the rear of the light guide body 3. This makes it possible to prevent the generation of leaked light from the front surface 3c of the light guide body 3.

In the vehicle lighting tool 1, the mounting direction F of the light guide body 3 is illustrated in the direction from the rear of the vehicle to the front of the vehicle (-X-axis direction), but the mounting direction F of the light guide body 3 is illustrated. Is also applicable in the direction from the outside to the inside in the vehicle width direction.

The light source 2 may be any one that emits light L radially, and a light emitting element such as a laser diode (LD) can be used in addition to the above-mentioned LED. The number of light sources 2 arranged is not particularly limited, and is not limited to the above-mentioned configuration in which one light source 2 is arranged, and a plurality of light sources 2 may be arranged.

Further, the color of the light emitted by the light source 2 is not limited to the red light described above, and can be appropriately changed depending on the use of the light source 2, such as white light or orange light. Further, among the above-mentioned red light, orange light, and white light, at least two or more light sources 2 having different colors may be used.

Further, in the vehicle lighting tool 1, the shape of the light guide body 3 and the like can be appropriately changed according to the actual vehicle design and the like. Further, it is also possible to integrally combine the divided light guide bodies into one light guide body.

In the above embodiment, the case where the present invention is applied to the vehicle lighting equipment such as the tail lamp described above is illustrated, but when the tail lamp is configured, the light source 2 described above, the light guide body 3 serving as the inner lens, and the extension 5 are used. In addition, for example, it can be combined with other members such as an outer lens and a reflector.

Further, the vehicle lighting equipment to which the present invention is applied is not limited to the tail lamp (tail light) described above, and for example, a vehicle headlight (headlamp), a vehicle side light (position lamp), and an auxiliary headlight (sub). Headlamps), front (rear) fog lamps, daytime running lamps, lid lamps, brake lamps (stop lamps), back lamps, turn signals (winker lamps), etc. The present invention can be widely applied to vehicle lamps provided with a light guide.

1 ... Vehicle lighting 2 ... Light source 3 ... Light guide 3a ... One end surface 3b ... End side 3c ... Front 3d ... Rear surface 4 ... Light guide mounting part 4a ... Mounting surface 5 ... Extension 6 ... Light emitting part 7 ... Extension part 7a ... Step portion 7b ... Upper side directing portion 7c ... Rear end surface 8A, 8B, 8C ... Locking hole 8a ... First end surface 8b ... Second end surface 8c ... Third end surface 8d ... Fourth end surface 9A , 9B, 9C ... Locking protrusion D ... Light emitting surface L ... Light

Claims (5)

Light source and
A light guide body that guides the light emitted from the light source, and
It is provided with a light guide body mounting portion to which the light guide body is mounted.
The light emitted from the light source is incident on one end surface of the light guide body, and is repeatedly reflected inside the light guide body to guide the light toward the other end surface of the light guide body. A vehicle lamp that emits light from a light emitting unit provided on the front surface of the light guide.
The light guide has a shape curved from the inside to the outside in the vehicle width direction in accordance with the slant shape provided to the front end or the rear end side corner portion of the vehicle.
Moreover, it has an extending portion extending rearward from a position along the curved shape of the light guide body and a locking hole provided in the extending portion.
The light guide body mounting portion has a locking protrusion protruding from a mounting surface facing the extending portion.
Further, by sliding the extending portion in the mounting direction of the light guide body while facing the mounting surface, the locking protrusion is locked to the locking hole at the mounting position of the light guide body. Has a structure that is
The locking holes are formed on the first end face and the second end face that face each other in parallel in the mounting direction of the light guide body.
A third end surface that connects the first end surface and the second end surface and is located on the front side with respect to the traveling direction of light that is guided from one end surface to the other end surface of the light guide body. When,
It has a fourth end face that connects the first end face and the second end face and is located on the opposite side of the third end face.
The third end face is inclined in a direction in which light incident on the third end face is reflected at an angle equal to or greater than a critical angle with respect to the tangential direction of the front surface of the light guide body. Lighting equipment. The vehicle lamp according to claim 1, wherein the third end surface is inclined in a direction substantially parallel to the tangential direction of the front surface along the curved shape of the light guide body. A plurality of the locking holes and the locking protrusions are provided side by side in the traveling direction of the light guided from one end surface to the other end surface of the light guide body.
Claim 1 or the plurality of locking holes are characterized in that the inclination angle of the third end surface with respect to the mounting direction of the light guide body is different along the curved shape of the light guide body. The vehicle lighting equipment according to 2. The extending portion is characterized by having a light incident on the end face of the rear end surface shape inclined in the direction of reflection at an angle equal to or greater than the critical angle relative to the tangential direction of the front of the light guide The vehicle lighting device according to any one of claims 1 to 3. It is provided with an extension that covers at least the front surface on the upper side of the upper end surface of the light guide body.
The extending portion extends rearward from the upper end surface of the light guide body and has an upper extending portion located above the upper end surface of the light guide body via a step portion.
The vehicle lamp according to any one of claims 1 to 4, wherein the locking hole is provided in the upper extending portion.

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