JP6571408B2 - Vehicle lamp - Google Patents

Description

  The present invention relates to a technical field relating to a vehicular lamp including a light guide that guides light emitted from a light emitting element in a predetermined direction.

JP 2014-75331 A

  Some vehicle lamps are configured such that light emitted from a light emitting element enters a light guide, and the incident light is guided in a predetermined direction by the light guide (see, for example, Patent Document 1). ).

  In the light guide described in Patent Document 1, a direction in which a plurality of light emitting elements are arranged is a longitudinal direction. In many cases, the light guide is formed by injection molding using a transparent molten resin. When the length of the light guide is increased, the moldability decreases due to sink marks generated when the molten resin is cooled. End up.

  Such a decrease in formability due to the occurrence of sink marks adversely affects the light guide control in the light guide, and there is a possibility that light cannot be guided in a necessary direction.

  Therefore, when a light guide having a long length is required, the light guide is divided and formed in the longitudinal direction in order to prevent deterioration of formability due to the occurrence of sink marks. It is considered that the light guides are used side by side.

  However, when light guides that are divided and formed in the longitudinal direction are used side by side, adjacent surfaces of each light guide are formed as split surfaces, and light incident on the light guide is split. Although it may reach the surface, it is desirable to ensure a good light guide state similar to that of the light guide without the split surface even when the split surface exists.

  Therefore, the present invention has an object of overcoming the above-described problems and ensuring a good light guiding state related to light incident on the light guide.

First, a vehicular lamp according to the present invention includes a first light guide having a first incident surface, a first light emitting element in which emitted light is incident from the first incident surface, A second light guide having two incident surfaces and a second light exit surface and positioned adjacent to the first light guide at a predetermined interval, and emitted light from the second light incident surface. An incident second light emitting element, and light emitted from the first light emitting element and incident from the first incident surface is sequentially transmitted through the first light guide and the second light guide. Light that is guided and emitted from the second emission surface, emitted from the second light emitting element, and incident from the second incident surface is guided by the second light guide and is emitted from the second emission surface. is emitted from the surface, it is the third light-emitting element emitted light is incident from the first incident surface provided on the first light guide, the third light emitting element The light incident from the first incident surface is emitted from the one in which the first emission surface to be emitted is formed.

Accordingly, at least the second light guide body is configured so that light emitted from the first light emitting element and incident from the first incident surface and light emitted from the second light emitting element and incident from the second incident surface are both at least. And is emitted from the second emission surface. In addition, light emitted from the first light emitting element and the third light emitting element is both guided by the first light guide and emitted from the second emission surface or the first emission surface.

  Secondly, in the vehicle lamp according to the present invention described above, it is desirable that the first light guide and the second light guide are combined and arranged.

  Accordingly, the predetermined distance between the first light guide and the second light guide is maintained by combining the first light guide and the second light guide.

Third, in the vehicle lamp according to the present invention described above, opposing the exit surface is formed on the first light guide member, which is positioned to face the opposing exit surface to the second light guide body Preferably, a counter incident surface is formed, the first output surface and the counter output surface are continuously located, and a boundary portion between the first output surface and the counter output surface is formed in a curved surface.

  As a result, light emitted from the boundary portion between the opposed emission surface and the first emission surface is easily diffused, and the luminance at the boundary portion is higher than the luminance at the peripheral portion of the boundary portion, so that only part of the light shines strongly. The phenomenon of shining and shining hardly occurs.

Fourth, in the vehicle lamp according to the present invention described above, opposing the exit surface is formed on the first light guide member, which is positioned to face the opposing exit surface to the second light guide body Preferably, a counter incident surface is formed, and the counter output surface and the counter incident surface are inclined with respect to the vertical direction so as to be displaced in the light traveling direction as they go downward.

  Thereby, the light emitted from the opposite emission surface is refracted downward.

According to the present invention, both the light emitted from the first light emitting element and incident from the first incident surface and the light emitted from the second light emitting element and incident from the second incident surface are at least the second The light is guided by the light guide and emitted from the second emission surface, and the light emitted from the first light emitting element and the third light emitting element is both guided by the first light guide and second emitted. It is possible to ensure a good light guiding state with respect to light emitted from the surface or the first emitting surface and incident on the light guide.

2 to 8 show an embodiment of a vehicular lamp according to the present invention, which is a cross-sectional view of the vehicular lamp. It is an expansion perspective view which shows each part of a 1st light guide and a 2nd light guide. It is a schematic vertical sectional view showing a path of light emitted from the first light emitting element. It is an expanded sectional view showing each part of the 1st light guide and the 2nd light guide. It is an expansion perspective view which shows the state with which the 1st light guide and the 2nd light guide were couple | bonded. It is a general | schematic enlarged plan view which shows the path | route of the light radiate | emitted from a 1st light emitting element. It is a general | schematic enlarged plan view which shows the path | route of the light radiate | emitted from a 2nd light emitting element or a 3rd light emitting element. FIG. 3 is a schematic vertical sectional view showing a path of light emitted from a first light emitting element in a configuration in which stepped protrusions are formed on a counter emission surface and a counter incident surface, respectively.

  EMBODIMENT OF THE INVENTION Below, the form for implementing the vehicle lamp of this invention is demonstrated with reference to an accompanying drawing.

  The embodiment shown below is applied to, for example, a lamp having both functions of a clearance lamp that functions as a vehicle width lamp and a daytime running lamp that functions as a marker lamp other than nighttime. The scope of application of the present invention is not limited to the lamps as described above. For example, clearance lamps, turn signal lamps, stop lamps, daytime running lamps, cornering lamps, hazard lamps, position lamps, back lamps, fog lamps. The present invention can be widely applied to various vehicle lamps such as tail lamps and head lamps, or various combination lamps that are combinations thereof.

  For example, the vehicular lamp 1 is mounted and arranged at both left and right ends of a front end portion of a vehicle body (not shown).

  The vehicular lamp 1 includes a lamp housing 2 having a recess opened forward and a cover 3 that closes the opening of the lamp housing 2 (see FIG. 1). The lamp housing 2 and the cover 3 constitute a lamp outer casing 4, and the inner space of the lamp outer casing 4 is formed as a lamp chamber 5.

  In the lamp chamber 5, a first light guide 6 and a second light guide 7 are arranged adjacent to each other at a predetermined interval. The first light guide 6 is positioned on the rear side of the second light guide 7, and the first light guide 6 and the second light guide 7 as a whole are the shapes of the left and right ends at the front end of the vehicle body. In accordance with the above, it is formed in a shape extending in an inclined state so as to be displaced rearward as it goes outward.

  The first light guide 6 is formed by integrally forming a light guide 8 for guiding incident light and attached projections 9 and 9 protruding from the light guide 8 by a transparent material.

  The light guide portion 8 is formed in a flat shape (plate shape) whose thickness direction is set in the vertical direction, and light incident portions 10, 10,... Formed in a step shape on the inner peripheral portion are adjacent to each other in the longitudinal direction. It is provided in the state. The light incident portion 10 is formed with a placement recess 11 that is open rearward and vertically.

  Each surface forming the arrangement recess 11 is formed as a first incident surface 11a, 11b, 11b (see FIG. 2). The first incident surface 11a is located between the first incident surfaces 11b and 11b and is formed into a gently curved surface convex backward, and the first incident surfaces 11b and 11b are respectively gently arcuate surfaces convex outward. Is formed.

  The outer surface of the light guide 8 is formed as a first emission surface 12, and a plurality of lens steps 12 a, 12 a,... Are formed on the first emission surface 12. The lens steps 12 a, 12 a,... Are formed in a matrix in the vertical direction and the longitudinal direction of the light guide unit 8. As the lens step 12a, for example, a fisheye step that refracts and diffuses light is formed.

  The light guide portion 8 is formed as an opposite emission surface 13 whose frontmost surface faces substantially forward (see FIGS. 2 and 3). The opposing emission surface 13 is formed, for example, in a planar shape, and is inclined with respect to the vertical direction so as to be displaced forward as it goes downward (see FIG. 3). Note that the opposed emission surface 13 may be inclined with respect to the vertical direction so as to be displaced rearward as it goes downward.

  A boundary portion between the opposed emission surface 13 and the first emission surface 12 is formed on the curved surface 14 (see FIG. 4). The curved surface 14 is formed in a substantially arc shape with a horizontal cross section protruding substantially rearward.

  Since the boundary portion between the opposed emission surface 13 and the first emission surface 12 is formed on the curved surface 14 in this way, light emitted from the boundary portion is easily diffused, and thus the luminance at the boundary portion is The phenomenon of so-called shining or line shining in which only a part of the surrounding portion is brighter than that of the surrounding portion is less likely to occur, and unevenness in the luminance of the light emitted from the first light guide 6 can be suppressed.

  A screw insertion hole 9 a is formed at the tip of the attached projection 9. A coupling hole 15 is formed in the base end portion of the attached portion 9 located closest to the second light guide 7 (see FIG. 5).

  The second light guide 7 has a light guide 16 for guiding incident light and attached projections 17, 17,... Projecting from the light guide 16 are the same as the first light guide 6. It is integrally formed of a material (see FIG. 1).

  The light guide part 16 is formed in a flat shape (plate shape) whose thickness direction is set in the vertical direction, and light incident parts 18, 18,... Formed in a step shape on the inner peripheral part are adjacent to each other in the longitudinal direction. It is provided in the state. The light incident portion 18 is provided with a placement recess 19 that is open rearward and vertically.

  Each surface forming the arrangement recess 19 is formed as a second incident surface 19a, 19b, 19b (see FIG. 2). The second incident surface 19a is located between the second incident surfaces 19b and 19b and is formed into a gently curved surface convex backward, and the second incident surfaces 19b and 19b are respectively gently arcuate surfaces convex outward. Is formed.

  The outer surface of the light guide portion 16 is formed as a second emission surface 20, and a plurality of lens steps 20 a, 20 a,. The lens steps 20 a, 20 a,... Are formed in a matrix in the vertical direction and the longitudinal direction of the light guide unit 16. The lens step 20a is the same lens step as the lens step 12a. As the lens step 20a, for example, a fish-eye step that refracts and diffuses light is formed.

  The light guide 16 is formed as an opposing incident surface 21 whose rearmost surface is substantially rearward (see FIGS. 2 and 3). The opposing incident surface 21 is formed, for example, in a flat shape, and is inclined with respect to the vertical direction so as to be displaced rearward as it goes downward (see FIG. 3). The opposing incident surface 21 may be inclined with respect to the vertical direction so as to be displaced forward as it goes downward.

  A screw insertion hole 17 a is formed at the tip of the attached projection 17. The second light guide 7 is provided with a coupling protrusion 22 projecting toward the first light guide 6 at the end of the first light guide 6 (see FIG. 5).

  The first light guide body 6 and the second light guide body 7 are coupled by the coupling protrusion 22 being inserted into the coupling hole 15 and fitted.

  In the state in which the first light guide 6 and the second light guide 7 are combined, the opposing emission surface 13 and the opposing incidence surface 21 are positioned to face each other, and between the opposing emission surface 13 and the opposing incidence surface 21. A predetermined interval is formed in (see FIG. 2). The counter emission surface 13 and the counter incident surface 21 are formed so that the upper edge and the lower edge extend in a substantially left-right direction. By using the opposite emission surface 13 and the opposite incidence surface 21 in such a direction, the opposite emission surface 13 and the opposite incidence surface 21 do not tilt in the left and right directions with respect to the light traveling direction. The efficiency can be improved and the light can be easily controlled by guiding the light in a desired direction.

  By combining the first light guide 6 and the second light guide 7 as described above, a predetermined distance between the first light guide 6 and the second light guide 7 is maintained. Can be arranged at predetermined positions, respectively, and position accuracy can be improved.

  An extension (not shown) is arranged around the first light guide 6 and the second light guide 7. By disposing the extension, each part disposed behind the first light guide 6 and the second light guide 7 in the lamp chamber 5 is shielded.

  A plate-like bracket 23 is disposed on the rear side of the first light guide 6 and the second light guide 7 (see FIG. 1). The bracket 23 is formed in a stepped shape, and portions facing the front-rear direction are provided as facing portions 23a, 23a,. The bracket 23 is disposed along the first light guide 6 and the second light guide 7, and the facing portions 23 a, 23 a,... Are respectively the first light guide 6 and the second light guide 7. Are located directly behind the light incident portions 10, 10,... 18, 18,. The bracket 23 is attached to the lamp housing 2, the cover 3, or the extension by screwing or the like.

  A substrate 24 is attached to one surface of the bracket 23. The board | substrate 24 is a flexible printed wiring board, for example, and is connected to the external power supply which is not shown in figure. The substrate 24 is provided with mounting portions 24a, 24a,... Attached to the front surfaces of the facing portions 23a, 23a,.

  The light emitting elements 25, 25,... Are mounted on the mounting portions 24a, 24a,. The mounting portions 24a, 24a,... Are positioned to face the light incident portions 10, 10,..., 18, 18, ... of the first light guide 6 and the second light guide 7, respectively. The light emitting elements 25, 25,... Mounted on the mounting portions 24a, 24a,... Are respectively the first incident surfaces 11a, 11a,... And the second incident surfaces 19a, 19a,. Are disposed in the placement recesses 11, 11,..., 19, 19,.

  Among the light emitting elements 25, 25,..., For example, the light emitting elements 25 arranged in the arrangement recesses 11, 11 in the two light incident parts 10, 10 located on the front end side of the first light guide 6. , 25 are first light emitting elements 25a, 25a.

  Among the light emitting elements 25, 25,..., For example, the light emitting elements 25 arranged in the arrangement recesses 19, 19,. , 25,... Are second light emitting elements 25b, 25b,.

  Among the light emitting elements 25, 25,..., For example, arrangement concave portions in the light incident portions 10, 10, 10 other than the two light incident portions 10, 10 positioned on the front end side of the first light guide 6 The light emitting elements 25, 25, 25 arranged in 11, 11, 11 are third light emitting elements 25c, 25c, 25c.

  In the vehicular lamp 1 configured as described above, the first light guide body 6 and the second light guide body 7 are attached in a state in which the coupling protrusion 22 is fitted into the coupling hole 15 and coupled. .. Are attached to the lamp housing 2, the cover 3, or the extension through the screw insertion holes 9 a, 9 a, 17 a, 17 a,... Of the protrusions 9, 9, 17, 17,.

  When power is supplied from the external power source to the light emitting elements 25, 25,... Via the substrate 24, light is emitted from the light emitting elements 25, 25,.

  At this time, the light emitted from the first light emitting element 25a is incident on the first light guide 6 from the first incident surfaces 11a, 11b, and 11b of the first light guide 6, and the first incident surface. Light incident from 11b and 11b is internally reflected (see FIG. 6). At least a part of the light incident on the first light guide 6 is once emitted from the opposite light exit surface 13 and incident on the second light guide 7 from the opposite light entrance surface 21. The light is emitted from the two exit surfaces 20 to the outside.

  Since the opposed emission surface 13 is formed in a flat shape and is inclined with respect to the vertical direction so as to be displaced forward as it goes downward, the light emitted from the opposed emission surface 13 is refracted downward and second. Are diffused from the second exit surface 20 of the light guide 7 at the lens steps 20a, 20a,... And irradiated to the outside (see FIG. 3).

  Therefore, with respect to the light emitted from the second light guide 7 to the outside, the upward light is limited, and generation of dazzling light can be suppressed.

  Incidentally, it is necessary that the light is not totally reflected at the counter outgoing surface 13 and the counter incident surface 21. Therefore, the opposing exit surface 13 and the opposing entrance surface 21 are formed at an inclination angle that does not totally reflect light. For example, in the case of being formed of acrylic, the inclination angle of the counter emission surface 13 and the counter incidence surface 21 is formed at an inclination angle at which the incident angle of light is less than 42 °, and in the case of being formed of polycarbonate, It is formed at an inclination angle at which the incident angle of light is less than 39 °.

  On the other hand, the light emitted from the second light emitting element 25b is incident on the second light guide 7 from the second incident surfaces 19a, 19b, 19b of the second light guide 7, and the second incident surface. Light incident from 19b and 19b is internally reflected (see FIG. 7). The light incident on the second light guide 7 is diffused from the second exit surface 20 through the lens steps 20a, 20a,.

  The light emitted from the third light emitting element 25c is incident on the first light guide 6 from the first light incident surfaces 19a, 19b, 19b of the first light guide 6, and the first light incident surface. Light incident from 19b and 19b is internally reflected (see FIG. 6). The light incident on the first light guide 6 is diffused from the first emission surface 12 through the lens steps 12a, 12a,.

  As described above, the light emitted from the light emitting elements 25, 25,... Is diffused by the lens steps 12a, 12a,. However, in the vehicular lamp 1, the light is internally reflected (totally reflected) or transmitted according to the incident angle with respect to the lens steps 12a, 12a,..., 20a, 20a,. Even if it is configured to be guided by the first light guide 6 or the second light guide 7 and reach the first emission surface 12 or the second emission surface 20 again to be irradiated to the outside. Good.

  As described above, in the vehicular lamp 1, light emitted from the first light emitting element 25 a and incident from the first incident surfaces 19 a, 19 b, 19 b is transmitted to the first light guide 6 and the second light guide 6. Are sequentially guided by the light guide 7 and emitted from the second emission surface 20 of the second light guide 7, emitted from the second light emitting element 25b, and incident from the second incident surfaces 19a, 19b and 19b. Light is guided by the second light guide 7 and is emitted from the second emission surface 20.

  Accordingly, both the light emitted from the first light emitting element 25 a and the light emitted from the second light emitting element 25 b are guided by at least the second light guide 7 and emitted from the second emission surface 20. Therefore, even when the first light guide body 6 and the second light guide body 7 that are arranged side by side in the longitudinal direction are used and there are split surfaces (the counter light output surface 13 and the counter light input surface 21), the split surface It is possible to ensure a good light guide state similar to that of a light guide that does not exist.

  Moreover, since the 1st light emission body 12 in which the light emitted from the 3rd light emitting element 25c is radiate | emitted is formed in the 1st light guide 6, the 1st light emitting element 25a and the 3rd light emitting element All of the light emitted from 25c is guided by the first light guide 6 and emitted from the second emission surface 20 or the first emission surface 12, and the amount of light irradiated with a small number of parts is increased. The degree of freedom of control can be improved.

  In the above, an example is shown in which the opposing light emitting surface 13 of the first light guide 6 and the opposing light incident surface 21 of the second light guide 7 are both formed in a planar shape. It is also possible to form stepped protrusions 13a, 13a, ..., 21a, 21a, ... on the surface 13 and the opposite incident surface 21 (see Fig. 8).

  .. Are formed on the counter-exiting surface 13 and the counter-incident surface 21, respectively, so that the projecting parts 13a, 13a,. The projecting portions 21a, 21a,... Can control the light traveling direction in a desired direction and can also diffuse the light, thereby ensuring a good control state of the light. In addition, luminance unevenness can be reduced.

  In addition, the lens steps 12a, 12a,..., 20a, 20a,... Are not limited to the fisheye step, and may be, for example, steps formed in a substantially hemispherical shape on the rear side. Moreover, you may form so that several convex or concave cylindrical shapes may be located in a line back. Even if such steps are formed, the first light guide 6 and the second light guide are sufficiently diffused by sufficiently diffusing the light emitted from the first emission surface 12 and the second emission surface 20. The uniformity of the light emitted from 7 can be improved.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp, 6 ... 1st light guide, 7 ... 2nd light guide, 11a ... 1st entrance plane, 11b ... 1st entrance plane, 12 ... 1st exit surface, 13 ... Opposing exit surface, 14 ... curved surface, 19a ... second entrance surface, 19b ... second entrance surface, 20 ... second exit surface, 21 ... opposite entrance surface, 25a ... first light emitting element, 25b ... second Light-emitting element, 25c ... third light-emitting element

Claims (4)

A first light guide having a first incident surface;
A first light emitting element into which emitted light is incident from the first incident surface;
A second light guide having a second entrance surface and a second exit surface and positioned adjacent to the first light guide at a predetermined interval;
A second light emitting element in which emitted light is incident from the second incident surface;
Light emitted from the first light emitting element and incident from the first incident surface is sequentially guided by the first light guide and the second light guide and is emitted from the second emission surface. ,
Light emitted from the second light emitting element and incident from the second incident surface is guided by the second light guide and emitted from the second emission surface ,
A third light-emitting element through which emitted light is incident from the first incident surface is provided;
A vehicular lamp in which a first emission surface from which light emitted from the third light emitting element and incident from the first incident surface is emitted is formed on the first light guide . The vehicular lamp according to claim 1, wherein the first light guide and the second light guide are combined and arranged. An opposing exit surface is formed on the first light guide;
The second light guide is formed with a counter incident surface located opposite the counter output surface,
The first exit surface and the opposing exit surface are continuously located;
The vehicular lamp according to claim 1, wherein a boundary portion between the first emission surface and the opposite emission surface is formed into a curved surface. An opposing exit surface is formed on the first light guide;
The second light guide is formed with a counter incident surface located opposite the counter output surface,
4. The vehicular lamp according to claim 1, wherein the opposed emission surface and the opposed incident surface are inclined with respect to a vertical direction so as to be displaced in a light traveling direction as going downward.

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