JP2011228177A - Lighting fixture for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture for vehicle having a light-emitting element as a light source in which the luminous flux utilization factor is increased and light control accuracy is enhanced, thereby, a translucent member is made visible emitting light up to the peripheral portion.SOLUTION: In the lighting fixture for vehicle, the central region of a translucent member 14 which covers the light emitting element 12 from the front side is constructed as a first light control part 14A to emit light entered here in a direction separating from an optical axis Ax, and the peripheral region is constructed as a second light control part 14B which makes the emitting light re-enter and inner-face reflect at the rear face 14c, and then, emit to the front from the front face 14d. In this case, a plurality of prism parts 14e1, 14e2 are formed in the front 14e of the first light control part 14A, and the light from the light emitting element 12 is inner-face reflected by first front surfaces 14e1a, 14e2a and emitted from second front surfaces 14e1b, 14e2b. The second light control part 14B is constructed of pillar-shape parts 14B2, 14B1 which are formed in a plurality of places in position relations to make the emitting light from each prism parts 14e1, 14e2 re-enter.

Description

  The present invention relates to a vehicular lamp using a light emitting element as a light source.

  In recent years, a vehicular lamp using a light emitting element such as a light emitting diode as a light source is widely used.

  For example, in “Patent Document 1”, a vehicle including a light emitting element disposed forward on an optical axis extending in the front-rear direction of a lamp, and a translucent member disposed so as to cover the light emitting element from the front side. Lamps are listed.

  At that time, in the translucent member described in “Patent Document 1”, the central region located in the vicinity of the optical axis emits light from the light emitting element incident on the translucent member in a direction away from the optical axis. The rear area of the translucent member is configured as a first light control section, and a peripheral area located around the central area causes the light emitted from the first light control section to re-enter the translucent member. Then, the second light control unit is configured to emit the light from the front surface of the translucent member to the front after being reflected from the inner surface.

  The translucent member described in “Patent Document 1” has an annular prism whose cross-sectional shape along the plane including the optical axis is set to a substantially wedge shape on the front surface of the first light control unit. The light from the light emitting element incident on the translucent member is internally reflected on the inner peripheral surface of the annular prism and then emitted from the outer peripheral surface.

JP 2004-152664 A

  If the translucent member described in the above-mentioned “Patent Document 1” is used, the luminous efficiency of the light from the light emitting element is increased, and the translucent member appears to emit light brightly up to its periphery. It becomes possible to do.

  However, in the translucent member described in “Patent Document 1”, the front surface of the first light control unit is configured by a single annular prism. The thickness is quite thick. For this reason, there is a problem that sink marks are likely to occur when the light-transmitting member is formed, and therefore, control of light from the light-emitting element cannot be performed with high accuracy.

  The present invention has been made in view of such circumstances. In a vehicular lamp using a light emitting element as a light source, the luminous flux utilization rate for light from the light emitting element is increased, and It is an object of the present invention to provide a vehicular lamp that can control light with high accuracy and can make a translucent member appear to emit light brightly up to its peripheral portion.

  In the present invention, the light transmission element is arranged so as to cover the light emitting element from the front side, and the shape of the light transmission member is devised to achieve the above object.

That is, the vehicular lamp according to the present invention is
In a vehicular lamp comprising: a light emitting element disposed forward on an optical axis extending in the front-rear direction of the lamp; and a translucent member disposed so as to cover the light emitting element from the front side.
A central region located in the vicinity of the optical axis in the light transmitting member is configured as a first light control unit that emits light from the light emitting element incident on the light transmitting member in a direction away from the optical axis. ,
After the peripheral region located around the central region in the translucent member causes the emitted light from the first light control unit to re-enter the translucent member and internally reflect on the rear surface of the translucent member It is configured as a second light control unit that emits forward from the front surface of the translucent member,
A plurality of prism portions whose cross-sectional shape along a predetermined plane including the optical axis is set in a substantially wedge shape are formed on the front surface of the first light control unit,
The second surface on the opposite side to the optical axis after each prism portion internally reflects the light from the light emitting element incident on the light transmitting member on the first surface on the optical axis side in the prism portion. Configured to emit from
The second light control unit is formed at a plurality of locations in a positional relationship for re-entering light emitted from each of the plurality of prism units.

  The “vehicle lamp” is not limited to a specific type of vehicle lamp, and for example, a tail lamp, a stop lamp, a clearance lamp, a high-mount stop lamp, and the like can be employed. Further, the “vehicle lamp” may be configured to include only one set of the light emitting element and the translucent member, or may be configured to include a plurality of sets of these.

  The “light-emitting element” means an element-like light source having a light-emitting portion that emits light substantially in the form of dots, and the type thereof is not particularly limited.

  The “translucent member” is not particularly limited as long as it is a translucent member. For example, a material composed of a transparent synthetic resin or a material composed of glass is adopted. Is possible.

  The “plurality of prism portions” may be formed over the entire area of the front surface of the first light control section, or may be formed in a partial area thereof, and the number of the formed prism sections may be plural. It is not particularly limited.

  The specific shape of each of the “prism portions” is not particularly limited as long as the cross-sectional shape along a predetermined plane including the optical axis is set to a substantially wedge shape. It is possible to adopt an annular shape or a substantially wedge-shaped cross-sectional shape that extends linearly.

  The “predetermined plane” may be a horizontal plane, a vertical plane, or any other plane as long as it is a plane including the optical axis.

  The “second light control unit” is configured to emit the light emitted from the first light control unit again to the translucent member, reflect the inner surface on the rear surface, and then emit the light forward from the front surface. In addition, the specific shape is not particularly limited as long as it is formed at a plurality of locations in a positional relationship in which the emitted light from each of the plurality of prism portions is reincident.

  As shown in the above configuration, the vehicular lamp according to the present invention is a translucent member that covers a light emitting element disposed forward on the optical axis extending in the front-rear direction of the lamp so as to cover the light-emitting element from the front side. Is arranged, the luminous flux utilization factor for the light from the light emitting element can be increased.

  In this case, the translucent member has a central region located near the optical axis configured as a first light control unit that emits light from the light emitting element incident on the translucent member in a direction away from the optical axis. In addition, a peripheral region located around the central region causes the light emitted from the first light control unit to re-enter the light-transmitting member and internally reflect on the rear surface thereof, and then emit the light forward from the front surface. Since it is comprised as a 2nd light control part, a translucent member can be made to make it light-emit brightly to the peripheral part.

  In addition, in the vehicular lamp according to the invention of the present application, a plurality of prism portions whose cross-sectional shape along a predetermined plane including the optical axis is set in a substantially wedge shape on the front surface of the first light control portion in the translucent member. And each of the prism portions reflects the light from the light emitting element incident on the light transmitting member on the first surface of the prism portion on the optical axis side, and then the side opposite to the optical axis. Since the second light control unit is formed at a plurality of locations in a positional relationship for re-entering the light emitted from each of the plurality of prism units, The following effects can be obtained.

  That is, since a plurality of prism portions are formed on the front surface of the first light control unit, the thickness of the first light control unit can be prevented from becoming so thick. For this reason, it is possible to effectively suppress the occurrence of sink marks when the light-transmitting member is formed, and thereby it is possible to accurately control the light from the light emitting element.

  In addition, since the second light control unit is formed at a plurality of locations in a positional relationship corresponding to each of the plurality of prism units formed on the front surface of the first light control unit, the periphery of the translucent member emits light brightly Therefore, it is possible to perform fine control for making it look like.

  As described above, according to the present invention, in a vehicular lamp using a light emitting element as a light source, it is possible to accurately control light from the light emitting element while increasing the luminous flux utilization factor for the light from the light emitting element. In addition, it is possible to make the translucent member appear to emit light brightly up to its peripheral edge. As a result, the appearance of the vehicular lamp can be improved during lighting.

  In the vehicular lamp according to the invention of the present application, since the first light control unit of the translucent member also leaks light that leaks forward from each corner portion of the plurality of prism portions formed on the front surface thereof. The central region of the translucent member is never darkened.

  In the above configuration, a plurality of condensing lenses that allow light from the light emitting element to enter the light transmitting member as substantially parallel light within the predetermined plane in a light incident region where light from the light emitting element is incident on the rear surface of the light transmitting member. In addition to the configuration in which the elements are formed, each of the plurality of condensing lens elements transmits light from the light emitting elements incident on the light transmitting member in the condensing lens elements to the first surface of each of the plurality of prism portions. If it is the structure formed in the position to reach | attain, most of the light from a light emitting element can be radiate | emitted from a 1st light control part, and may inject into a 2nd light control part, and the control is performed accurately. It can be carried out.

In the above configuration, the base end region on the second surface of at least one prism unit among the plurality of prism units directly emits light from the light emitting element that has entered the translucent member, forward from the base end region. With the structure formed as described above, the base end region of the second surface of the prism portion formed in this way can be seen to emit light brightly. And thereby, the translucent member can be seen to emit light more uniformly,
In the above configuration, the translucent member is formed in a horizontally long rectangular shape when viewed from the front of the lamp, and a plurality of prism portions are formed in vertical stripes at a plurality of positions in the left-right direction on the front surface of the first light control unit. If the second light control unit is configured to be formed in vertical stripes at a plurality of locations in the left and right sides of each of the left and right sides of the first light control unit, a lamp configuration with a narrow vertical width is adopted. Even in this case, it is possible to make the translucent member appear to emit light brightly up to the left and right peripheral edges.

  In this case, if a plurality of sets of light emitting elements and translucent members are arranged in the left-right direction, the vehicular lamp can be elongated in the left-right direction. At that time, if each of these pairs of light-transmitting members is formed integrally with each other, the appearance of the vehicular lamp can be enhanced during non-lighting and the lamp configuration can be simplified. .

The front view which shows the vehicle lamp which concerns on one Embodiment of this invention II-II sectional view of FIG. Detailed cross-sectional view taken along line III-III in FIG. Detail view of section IV in Fig. 1 Detailed view of part V in FIG. The same figure as FIG. 5 which shows the modification of the said embodiment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a vehicular lamp 10 according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II.

  As shown in these drawings, a vehicular lamp 10 according to the present embodiment is a high-mount stop lamp disposed on a rear tray, a rear spoiler, or the like in a vehicle interior of a vehicle, and has a horizontally long rectangular outer shape when viewed from the front of the lamp. have.

  This vehicular lamp 10 has a configuration in which six sets of light-emitting elements 12 and a translucent member 14 are attached to a lamp body 16 in a state where they are arranged in parallel in the left-right direction.

  At this time, the lamp body 16 is configured as a box-shaped member having a front end opening 16a having a horizontally long rectangular shape. Each pair of translucent members 14 is formed in a horizontally long rectangular shape when viewed from the front of the lamp, and is integrally formed so as to be connected to each other at both left and right ends thereof. The six integrally formed light-transmitting members 14 are fitted in the front end opening 16a of the lamp body 16, and the pair of flange portions 14b formed on the left and right sides of the lamp body 16 It is fixed to the front end opening 16a by bonding or the like.

  In this vehicular lamp 10, the light emitting elements 12 and the translucent member 14 of each set have the same configuration.

  Therefore, in the following, a set of the light emitting element 12 and the light transmissive member 14 are taken out of these, and the configuration thereof will be described in detail.

  3 is a detailed cross-sectional view taken along the line III-III in FIG. 1, and FIG. 4 is a detailed view of a portion IV in FIG. FIG. 5 is a detailed view of a portion V in FIG.

  As shown in these drawings, the light emitting element 12 is a red light emitting diode in which a light emitting chip 12a having a size of about 0.3 to 1 mm square is covered with a sealing resin 12b in a hemispherical shape. 12a is fixed to the rear wall 16b of the lamp body 16 in a state where the lamp 12 is directed forward (backward as a vehicle) on the optical axis Ax extending in the longitudinal direction of the lamp.

  The translucent member 14 is a transparent synthetic resin molded product, has a cross-sectional shape that extends in a substantially V shape toward the front of the lamp in plan view, and is formed symmetrically with respect to the optical axis Ax. And this translucent member 14 is arrange | positioned so that the light emitting element 12 may be covered from the front side in the top part after that.

  The translucent member 14 has a central region located near the optical axis Ax as the first light control unit 14A, and peripheral regions located at the left and right sides thereof as the second light control unit 14B. . A light incident region 14 a for allowing light from the light emitting element 12 to enter the light transmissive member 14 is formed on the rear surface of the rear top portion of the light transmissive member 14.

  Hereinafter, the configuration of each of the first light control unit 14A, the second light control unit 14B, and the light incident region 14a will be described.

  First, the configuration of the light incident region 14a will be described.

  As shown in FIG. 5, the light incident area 14a is formed in a substantially arc shape centering on the light emission center O of the light emitting chip 12a in plan view.

  Specifically, the light incident region 14a has a configuration in which condensing lens elements 14s are formed at four locations on an arc centered on the light emission center O of the light emitting chip 12a in plan view. These four condenser lens elements 14s are formed to extend in the vertical direction in close contact with each other at an equal angle so as to sandwich the vertical plane including the optical axis Ax. Each of the condenser lens elements 14s is formed so that light emitted from the light emission center O of the light emitting chip 12a (hereinafter referred to as “reference emission light”) enters the translucent member as parallel light in a horizontal plane. ing. In addition, the regions on both sides of the four condenser lens elements 14s in the light incident region 14a are formed so as to extend in the vertical direction while maintaining an arcuate horizontal sectional shape.

  On the other hand, as shown in FIG. 3, the light incident area 14a is formed in the following special Fresnel lens shape in a side view.

  That is, in the light incident region 14a, the portion 14a1 located in the vicinity of the optical axis Ax is formed in a convex lens shape in a side view, and the portions 14a2 located on both upper and lower sides thereof are substantially prismatic in two steps. Is formed.

  Specifically, the portion 14a1 located in the vicinity of the optical axis Ax is configured with a convex curve that makes the reference emission light incident as light parallel to the optical axis Ax in the vertical plane including the optical axis Ax. ing. Further, the portions 14a2 positioned on both upper and lower sides of the portion 14a2 are parallel to the optical axis Ax after the reference outgoing light is refracted in a direction away from the optical axis Ax in the vertical plane including the optical axis Ax. It is composed of a substantially wedge-shaped curve that is internally reflected by total reflection as light.

  The light incident area 14a has a vertical cross-sectional shape shown in FIG. 3, and is formed to extend in a substantially arc shape to the left and right sides of the optical axis Ax with a vertical line passing through the light emission center O of the light emitting chip 12a as a center. . Thereby, in the light incident region 14a, the reference emission light is incident on the light transmitting member 14 as light parallel to the horizontal plane including the optical axis Ax in the vertical direction, while each condenser lens is in the horizontal direction. The element 14s is incident on the light transmitting member 14 as parallel light, and is incident on the light transmitting member 14 as light traveling straight without being refracted as it is in the left and right regions.

  Next, the configuration of the first light control unit 14A will be described.

  As shown in FIG. 5, the first light control unit 14 </ b> A has the light from the light emitting element 12 that is incident on the light transmitting member 14 at a relatively small opening angle in the left-right direction with respect to the optical axis Ax in the light incident region 14 a. Is emitted from the front surface 14e in a direction away from the optical axis Ax.

  Since the shape of the first light control unit 14A is symmetrical with respect to the optical axis Ax, one of the shapes will be described.

  On one side of the front surface 14e of the first light control unit 14A, two prism portions 14e1 and 14e2 (that is, four prism portions on both sides of the front surface 14e) having a horizontal cross-sectional shape set to a substantially wedge shape are formed in vertical stripes. ing.

  First, of these two prism portions 14e1 and 14e2, the prism portion 14e1 located inside (that is, located closer to the optical axis Ax) will be described.

  The prism portion 14e1 reflects the light from the light emitting element 12 incident on the light transmissive member 14 on the first surface 14e1a on the optical axis Ax side of the prism portion 14e1 and then reflects the light on the side opposite to the optical axis Ax. Two surfaces 14e1b are configured to emit light.

  At this time, the first surface 14e1a is formed as a vertical wall surface extending obliquely forward at an opening angle of about 45 ° with respect to a vertical plane including the optical axis Ax from a position in the vicinity of the optical axis Ax. The shape is set to a substantially linear shape. The second surface 14e1b is formed as a vertical wall surface extending substantially parallel to the optical axis Ax, and its horizontal cross-sectional shape is set to a substantially linear shape.

  And this prism part 14e1 makes the 1st surface the light from the light emitting element 12 which injected into the translucent member 14 as parallel light in the condensing lens element 14s located inside among two condensing lens elements 14s on one side. After being internally reflected by total reflection at 14e1a, the light is emitted as substantially parallel light from the second surface 14e1b to the side and slightly forward.

  Next, the prism part 14e2 located outside will be described.

  The prism portion 14e2 is located slightly rearward of the prism portion 14e1 positioned on the inner side, so that light emitted from the second surface 14e1b of the prism portion 14e1 is not blocked.

  The prism portion 14e2 reflects the light from the light emitting element 12 incident on the translucent member 14 on the first surface 14e2a on the optical axis Ax side in the prism portion 14e2 and then reflects the light on the side opposite to the optical axis Ax. The two surfaces 14e2b are configured to emit light.

  At this time, the first surface 14e2a is formed as a vertical wall surface extending obliquely forward from the base end position of the second surface 14e1b of the prism portion 14e1 with an opening angle of about 60 ° with respect to the vertical surface including the optical axis Ax. The horizontal cross-sectional shape is set to a substantially linear shape. Further, the second surface 14e2b is formed as a vertical wall surface extending slightly inclined in a direction slightly closer to the optical axis Ax toward the front with respect to a vertical plane parallel to the optical axis Ax, and its horizontal cross-sectional shape is a substantially straight line. The shape is set.

  The prism portion 14e2 causes the light from the light emitting element 12 incident as parallel light to the light transmitting member 14 to be internally reflected by total reflection at the first surface 14e2a in the condenser lens element 14s located on the outer side. Later, the light is emitted as substantially parallel light from the second surface 14e2b to the side and slightly rearward.

  The proximal end region 14e2b1 on the second surface 14e2b of the prism portion 14e2 is formed at an inclination angle closer to the vertical plane parallel to the optical axis Ax than the other regions. The inner surface reflected light from the first surface 14e2a does not reach the base end region 14e2b1, but instead, the arc-shaped horizontal in the light incident region 14a further outside the condenser lens element 14s located outside. In the portion formed in the cross-sectional shape, the light from the light emitting element 12 that has entered the translucent member 14 so as to go straight in a radial direction reaches the light transmitting member 14. And this base end part area | region 14e2b1 is made to radiate | emit the light which reached this base end part area | region 14e2b1 as diffused light which spread | diffuses to a horizontal direction centering on the direction which leaves | separates from the optical axis Ax toward the front. Yes.

  Next, the configuration of the second light control unit 14B will be described.

  The second light control unit 14B is arranged in a pair on both the left and right sides of the first light control unit 14A (ie, the central region), and since the shape thereof is symmetrical, only one of them will be described.

  As shown in FIG. 5, the second light control unit 14B re-enters the light emitted from the first light control unit 14A into the translucent member 14 and internally reflects it from the rear surface 14c, and then from the front surface 14e. It is comprised so that it may radiate | emit ahead.

  At this time, the second light control unit 14B has a configuration in which two columnar parts 14B1 and 14B2 are connected in a stepped manner. These two columnar portions 14B1 and 14B2 are both formed in a substantially triangular horizontal cross-sectional shape so as to extend linearly in the vertical direction, and are located on the inner side (that is, positioned closer to the optical axis Ax). The part 14B1 is formed in a horizontal cross-sectional shape smaller than the columnar part 14B2 located on the outside.

  The columnar part 14B1 located on the inner side is located substantially on the side of the prism part 14e2 of the first light control part 14A. This columnar portion 14B1 is formed as a vertical wall surface whose rear surface 14B1a extends obliquely forward with an opening angle of about 40 ° with respect to the optical axis Ax, and the side surface 14B1b on the optical axis Ax side has an optical axis Ax. The front wall surface 14B1c is formed as a vertical wall surface extending in a direction substantially orthogonal to the optical axis Ax.

  As a result, the columnar portion 14B1 causes the substantially parallel light emitted from the second surface 14e2b of the prism portion 14e2 of the first light control portion 14A toward the side and slightly rearward from the side surface 14B1b, and then the rear surface. After being internally reflected by total reflection at 14B1a, the light is emitted as substantially parallel light in a direction substantially parallel to the optical axis Ax (specifically, a direction slightly away from the optical axis Ax) from the front surface 14B1c to the front. It has become.

  The horizontal position of the side surface 14B1b in the columnar portion 14B1 is determined by the diffused light emitted forward from the base end region 14e2b1 in the second surface 14e2b of the prism portion 14e2 of the first light control unit 14A. The position is set so as not to be shielded by the portion 14B1.

  The columnar part 14B2 located on the outer side is located slightly on the side of the prism part 14e1 of the second light control part 14A. The columnar portion 14B2 is formed as a vertical wall surface whose rear surface 14B2a extends obliquely forward at an opening angle of about 50 ° with respect to the optical axis Ax, and the side surface 14B2b on the optical axis Ax side has an optical axis Ax. The front wall surface 14B2c is formed as a vertical wall surface substantially orthogonal to the optical axis Ax.

  As a result, the columnar portion 14B2 causes the substantially parallel light emitted from the second surface 14e1b of the prism portion 14e1 of the first light control portion 14A toward the side and slightly forward to enter from the side surface 14B2b, and the rear surface. After the internal reflection by total reflection at 14B2a, the light is emitted from the front surface 14B2c as substantially parallel light in a direction substantially parallel to the optical axis Ax.

  Protrusions 14c1 and 14c2 projecting rearward are formed at the ends on the optical axis Ax side of the columnar portions 14B1 and 14B2 on the rear surface 14c of the second light control unit 14B. Each of the protrusions 14c1 and 14c2 has side surfaces 14c1a and 14c2a that extend substantially parallel to the optical axis Ax. Then, the light from the light emitting element 12 that has entered the light transmitting member 14 so as to go straight from the outer end region of the portion formed in the arc-shaped horizontal cross-sectional shape in the light incident region 14a is converted into each protrusion 14c1, After the light is emitted so as to be refracted forward from the side surfaces 14c1a and 14c2a of the 14c2, it is re-entered from the rear surfaces 14B1a and 14B2a into the columnar portions 14B1 and 14B2, and slightly light forward from the front surfaces 14B1c and 14B2c. The light is emitted in a direction closer to the axis Ax.

  Next, the effect of this embodiment is demonstrated.

  In the vehicular lamp 10 according to the present embodiment, the light-transmitting member 14 is disposed so as to cover the light emitting element 12 disposed forward on the optical axis Ax extending in the front-rear direction of the lamp from the front side. Therefore, the luminous flux utilization factor for the light from the light emitting element 12 can be increased.

  At that time, since the translucent member 14 is formed in a horizontally long rectangular shape when the lamp is viewed from the front, the vertical width of the vehicular lamp 10 can be reduced, but the translucent member 14 is formed on the rear surface thereof. The light incident region 14a is formed of a curved surface that allows the light from the light emitting element 12 to be incident as substantially parallel light in the vertical direction, so that the light from the light emitting element 12 is formed despite being formed in a horizontally long rectangular shape. It is possible to ensure a sufficient luminous flux utilization rate for the.

  In addition, the translucent member 14 has a central region located near the optical axis Ax and a first light control unit 14A that emits light from the light emitting element 12 incident on the translucent member 14 in a direction away from the optical axis Ax. In addition, the peripheral regions located on both the left and right sides of the central region cause the light emitted from the first light control unit 14A to re-enter the translucent member 14 and to be internally reflected by the rear surface 14c. Since it is configured as the second light control unit 14B that emits the light forward from the front surface 14d after that, it is possible to make the translucent member 14 appear to emit light brightly up to the peripheral part.

  In addition, in the vehicular lamp according to the present embodiment, two pairs of right and left prism portions 14e1 whose horizontal cross-sectional shape is set to a substantially wedge shape are formed on the front surface 14e of the first light control portion 14A of the translucent member 14. 14e2 is formed, and each of the prism portions 14e1 and 14e2 transmits the light from the light emitting element 12 incident on the light transmitting member 14 to the first surface 14e1a on the optical axis Ax side of the prism portions 14e1 and 14e2. The second light control unit 14B is configured to emit light from the second surfaces 14e1b and 14e2b opposite to the optical axis Ax after being internally reflected by 14e2a, and the second light control unit 14B includes two pairs of right and left prism units 14e1 and 14e2. Are formed as two pairs of left and right columnar portions 14B2 and 14B1 at four positions in a positional relationship where light emitted from each of them is re-entered. It is possible to obtain.

  That is, since the pair of right and left prism portions 14e1 and 14e2 are formed on the front surface 14e of the first light control unit 14A, the thickness of the first light control unit 14A can be prevented from becoming so thick. For this reason, it is possible to effectively suppress the occurrence of sink marks when the light-transmitting member 14 is molded, and thereby it is possible to accurately control the light from the light emitting element 12.

  In addition, the second light control unit 14B has two pairs of left and right columnar portions 14B2 at four positions in a positional relationship corresponding to each of the pair of left and right prism portions 14e1 and 14e2 formed on the front surface 14e of the first light control unit 14A. 14B1, the control for making the peripheral portion of the translucent member 14 appear to emit light brightly can be performed finely.

  As described above, according to the present embodiment, in the vehicular lamp 10 using the light emitting element 12 as a light source, the luminous flux utilization rate for the light from the light emitting element 12 is increased and the control for the light from the light emitting element 12 is performed. It is possible to make the translucent member 14 appear to emit light brightly up to the peripheral portion thereof, while being able to perform with high accuracy. As a result, it is possible to improve the appearance of the vehicular lamp 10 during lighting.

  Note that in the vehicular lamp 10 according to the present embodiment, the corner portions of the two pairs of right and left prism portions 14e1 and 14e2 formed on the front surface 12e from the first light control portion 14A of the translucent member 14 and the like. Since the leaked light is emitted forward from the center, the central region of the translucent member 14 is not darkened.

  In addition, in the present embodiment, two pairs of right and left condensing lens elements 14 s that allow the light from the light emitting element 12 to enter the light transmitting member 14 as substantially parallel light in the horizontal plane in the light incident region 14 a of the light transmitting member 14. Each of the two right and left pairs of condensing lens elements 14s is formed so that the light from the light emitting element 12 incident on the translucent member 14 in the condensing lens elements 14s is converted into two pairs of right and left prism portions 14e1, 14e2 is formed at a position to reach the first surfaces 14e1a and 14e2a of each of the 14e2, so that most of the light from the light emitting element 12 is emitted from the first light control unit 14A and is incident on the second light control unit 14B. And the control can be performed with high accuracy.

  At this time, in the present embodiment, the prism portion 14e1 positioned on the inner side emits the light reflected on the inner surface by the first surface 14e1a as the substantially parallel light directed to the side slightly forward from the second surface 14e1b. Since the prism part 14e2 located in the position is configured to emit the light internally reflected by the first surface 14e2a as a substantially parallel light directed laterally and rearward from the second surface 14e2b, each of the prism parts 14e1 , 14e2 can be incident on the side surfaces 14B2b and 14B1b of the columnar portions 14B2 and 14B1 constituting the second light control unit 14B without difficulty.

In the present embodiment, the base end region 14e2b1 of the second surface 14e2b of each of the pair of left and right prism portions 14e2 located on the outside of the two pairs of left and right prism portions 14e1 and 14e2 is incident on the light transmitting member 14. Since the light from the light emitting element 12 is directly emitted forward from the base end region 14e2b1, the base end region 14e2b1 on the second surface 14e2b of each of the pair of left and right prism portions 14e2 is formed. Can appear brightly. And thereby, it is possible to make the translucent member 14 appear to emit light more uniformly.
Furthermore, in the present embodiment, two pairs of left and right prism portions 14e1 and 14e2 are formed in vertical stripes at four locations in the left and right direction on the front surface 14e of the first light control portion 14A, and the second light control portion 14B is Since the columnar portions 14B1 and 14B2 are formed in vertical stripes at two positions in the left-right direction on each of the left and right sides of the first light control unit 14A, the translucent member 14 is used even when a lamp configuration with a narrow vertical width is adopted. Can be seen to brightly emit light up to the left and right peripheral edges.

  In the present embodiment, the protrusions 14c1 and 14c2 are formed at the inner ends of the columnar portions 14B1 and 14B2 on the rear surface 14c of the second light control unit 14B, and the protrusions 14c1 and 14c2 are formed. After the light from the light emitting element 12 is emitted from the side surfaces 14c1a and 14c2a, the light is incident on the columnar portions 14B1 and 14B2 and emitted forward, so that the light from the light emitting element 12 can be emitted. The luminous flux utilization factor can be further increased, and the peripheral portion of the translucent member 14 can be made to emit light even more brightly.

  In the vehicular lamp 10 according to the present embodiment, since six sets of the light emitting elements 12 and the translucent members 14 are arranged in the left-right direction, the vehicular lamp 10 can be elongated in the left-right direction. it can. At this time, since each set of the translucent members 14 is formed integrally with each other, the appearance of the vehicular lamp 10 when not lit can be enhanced and the configuration of the lamp can be simplified. .

  In addition, the vehicular lamp 10 according to the present embodiment is not subjected to mirror processing at all in each pair of light-transmitting members 14, and thus can further improve the appearance when not lit.

  Furthermore, since the vehicular lamp 10 according to the present embodiment has a lamp configuration with a narrow vertical width, the vehicular lamp 10 can be disposed as a high-mount stop lamp in a portion where the vertical installation space is limited. Easy to do.

  In the above embodiment, two pairs of left and right prism portions 14e1 and 14e2 are formed on the front surface 14e of the first light control unit 14A in the translucent member 14, and the second light control unit 14B is formed of two pairs of columnar portions. Although it has been described that it is composed of 14B1 and 14B2, it is of course possible to set it to other numbers.

  In the said embodiment, although demonstrated as what was set as the structure by which 6 sets of the light emitting elements 12 and the translucent member 14 were arrange | positioned in the left-right direction, it is also possible to set it as the structure arrange | positioned 2-5 sets or 7 sets or more. It is also possible to have a configuration in which only one set is arranged.

  Next, a modification of the above embodiment will be described.

  FIG. 6 is a view similar to FIG. 5 showing the main part of the vehicular lamp according to this modification.

  As shown in the figure, the basic configuration of this vehicular lamp is the same as that of the vehicular lamp 10 according to the above embodiment, but the specific configuration of the translucent member 114 is the same as that of the above embodiment. It is different from the case of.

  That is, the translucent member 114 of the present modification is formed so that the entire light incident region 114a extends in the vertical direction while maintaining an arcuate horizontal cross-sectional shape, and like the translucent member 14 of the above embodiment, The condensing lens element 14s is not formed in the light incident region 14a. Further, on the front surface 114e of the first light control unit 114A, three prism portions 114e1, 114e2, and 114e3 having a horizontal cross-sectional shape set to a substantially wedge shape are formed in vertical stripes on the left and right sides of the optical axis Ax, respectively.

  At that time, the two inner prism portions 114e1 and 114e2 have substantially the same function as the two prism portions 14e1 and 14e2 in the above embodiment, and the outer prism portion 114e3 is the outer prism in the above embodiment. It has a part of the function of the part 14e2.

  That is, the innermost prism portion 114e1 causes the light from the light emitting element 12 incident on the light transmissive member 114 to be internally reflected by the first surface 114e1a and then laterally from the second surface 114e1b. It is configured to emit light slightly forward. At this time, the prism portion 114e1 transmits light from the light emitting element 12 that has entered the translucent member 14 so as to travel straightly between the prism portion 114e1 and the outer columnar portion 14B2 of the second light control unit 14B. It is comprised so that it may radiate | emit as convergent light converged by. In order to realize this, the horizontal surface of the first surface 114e1a of the prism portion 114e1 is set to a convex arc shape.

  In addition, the prism portion 114e2 positioned in the middle reflects the light from the light emitting element 12 incident on the light transmitting member 114 by internal reflection by total reflection on the first surface 114e2a, and then slightly laterally from the second surface 114e2b. It is configured to emit the diffused light as it is toward the rear.

  The prism portion 114e3 located on the outermost side causes the light from the light emitting element 12 incident on the translucent member 114 to move horizontally from the second surface 114e3b toward the front and slightly away from the optical axis Ax. It is constituted so that it may be emitted as diffused light that diffuses into the light source.

  In the translucent member 114 of this modification, the horizontal cross-sectional shapes of the two columnar portions 114B1 and 114B2 constituting the second light control unit 114B are slightly different from those in the above embodiment.

  That is, the columnar portion 114B1 positioned on the inner side is positioned substantially on the side of the prism portion 114e2 of the first light control portion 114A, and diffused light emitted from the second surface 114e2b of the prism portion 114e2 is converted into the side surface 114B1b. , And after being internally reflected by total reflection at the rear surface 141B1a, it is emitted from the front surface 114B1c as substantially parallel light in a direction substantially parallel to the optical axis Ax. In order to realize this, the horizontal cross-sectional shape of the rear surface 141B1a of the columnar portion 114B1 is set to a convex arc shape.

  Further, the columnar portion 114B2 located on the outer side is located slightly to the side of the prism portion 114e1 of the first light control portion 114A, and the light once converged by being emitted from the second surface 114e1b of the prism portion 114e1. After being incident as diffused light from the side surface 114B2b and internally reflected by the rear surface 114B2a by total reflection, it is emitted from the front surface 114B2c as substantially parallel light in a direction substantially parallel to the optical axis Ax. Yes. In order to realize this, the horizontal cross-sectional shape of the rear surface 141B2a of the columnar portion 114B2 is set to a convex arc shape.

  Note that in the translucent member 114 of the present modification as well, protrusions 114c1 and 114c2 similar to the protrusions 14c1 and 14c2 of the above embodiment are formed on the rear surface 14c of the second light control unit 114B.

  Next, the effect of this modification is demonstrated.

  In the light transmissive member 114 of this modification, three pairs of prism portions 114e1, 114e2, and 114e3 are formed on the front surface 114e of the first light control unit 114A, so that the thickness of the first light control unit 114A is much thicker. It can be avoided. For this reason, it is possible to effectively suppress the occurrence of sink marks when the light-transmitting member 114 is molded, and thereby it is possible to accurately control the light from the light emitting element 12.

  Further, in the light transmissive member 114 of this modification, the second light control unit 114B has a positional relationship corresponding to each of the pair of left and right prism portions 114e1 and 114e2 formed on the front surface 114e of the first light control unit 114A. Thus, since the left and right two pairs of columnar portions 114B2 and 114B1 are formed at four locations, the control for making the peripheral portion of the translucent member 114 appear to emit light brightly can be finely performed.

  Therefore, even when the configuration of the present modification is employed, substantially the same operational effects as in the above embodiment can be obtained.

  In the present modification, the light emitted from the prism portion 114e1 located on the innermost side of the front surface 114e of the first light control unit 114A is once converged and then incident on the outer columnar portion 114B2 of the second light control unit 114B. Even though the distance between the prism portion 114e1 and the columnar portion 114B2 is large, most of the light emitted from the second surface 114e1b of the prism portion 114e1 to the side slightly forward is included. The light can enter the side surface 114B2b of the columnar portion 114B2 without loss.

  In addition, the numerical value shown as a specification in the said embodiment and modification is only an example, and of course, you may set these to a different value suitably.

DESCRIPTION OF SYMBOLS 10 Vehicle lamp 12 Light emitting element 12a Light emitting chip 12b Sealing resin 14,114 Translucent member 14A, 114A 1st light control part 14B, 114B 2nd light control part 14B1, 14B2, 114B1, 114B2 Columnar part 14B1a, 14B2a, 114B1a , 114B2a Rear surface 14B1b, 14B2b, 114B1b, 114B2b Side surface 14B1c, 14B2c, 114B1c, 114B2c Front surface 14a, 114a Light incident area 14a1 Parts located near the optical axis 14a2 Parts located on both upper and lower sides 14b Flange part 14c 1c 14 114c2 Protrusion 14c1a, 14c2a Side 14d, 14e, 114d, 114e Front 14e1, 14e2, 114e1, 114e2, 114e3 Prism 14e1a , 14e2a, 114e1a, 114e2a First surface 14e1b, 14e2b, 114e1b, 114e2b, 114e3b Second surface 14e2b1 Base end region 14s Condensing lens element 16 Lamp body 16a Front end opening 16b Rear wall Ax Optical axis O Light emission center

Claims (5)

In a vehicular lamp comprising: a light emitting element disposed forward on an optical axis extending in the front-rear direction of the lamp; and a translucent member disposed so as to cover the light emitting element from the front side.
A central region located in the vicinity of the optical axis in the light transmitting member is configured as a first light control unit that emits light from the light emitting element incident on the light transmitting member in a direction away from the optical axis. ,
After the peripheral region located around the central region in the translucent member causes the emitted light from the first light control unit to re-enter the translucent member and internally reflect on the rear surface of the translucent member It is configured as a second light control unit that emits forward from the front surface of the translucent member,
A plurality of prism portions whose cross-sectional shape along a predetermined plane including the optical axis is set in a substantially wedge shape are formed on the front surface of the first light control unit,
The second surface on the opposite side to the optical axis after each prism portion internally reflects the light from the light emitting element incident on the light transmitting member on the first surface on the optical axis side in the prism portion. Configured to emit from
The vehicular lamp, wherein the second light control unit is formed at a plurality of locations in a positional relationship in which light emitted from each of the plurality of prism units reenters. A plurality of condensing lenses that allow light from the light emitting element to enter the light transmitting member as substantially parallel light within the predetermined plane in a light incident region where light from the light emitting element is incident on a rear surface of the light transmitting member. An element is formed,
Each of the plurality of condenser lens elements is formed at a position where the light from the light emitting element incident on the light transmitting member in the condenser lens element reaches the first surface of each of the plurality of prism portions. The vehicular lamp according to claim 1, wherein the vehicular lamp is provided.   The base end region of the second surface of at least one prism unit among the plurality of prism units directly emits light from the light emitting element that has entered the translucent member forward from the base end region. The vehicular lamp according to claim 1, wherein the vehicular lamp is formed as described above. The translucent member is formed in a horizontally long rectangular shape in front view of the lamp,
The plurality of prism portions are formed in vertical stripes at a plurality of positions in the left-right direction on the front surface of the first light control unit,
4. The vehicle according to claim 1, wherein the second light control unit is formed in vertical stripes at a plurality of positions in the left-right direction on each of the left and right sides of the first light control unit. Light fixture. A plurality of sets of the light emitting element and the light transmitting member are arranged in the left-right direction,
5. The vehicular lamp according to claim 4, wherein each of the sets of translucent members is integrally formed with each other.

Images