JP2010165485A - Lens, and lamp fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens and a lamp fitting forming a lighting fixture which looks different when it is lighted in comparison with when it is not lighted. <P>SOLUTION: This lens used in the lamp fitting includes at least a first lens cut and a second lens cut. The first lens cut and the second lens cut are to diffuse light radiated from a light source as a desired light distribution, and are formed between two guide curves extending in one direction. When the first and second lens cuts are cut by a plane perpendicular to the one direction, the first and second lens cuts are formed as lens cuts in which a curve appearing between two guide curves continuously changes as the cut position shifts from one end side to the other end side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lens and a lamp, and more particularly to a lens capable of forming a new-looking lamp having different appearances when lit and not lit, and a lamp using the lens.

  Conventionally, a vehicular lamp using a lens in which a kamaboko-shaped lens cut called a flute cut (hereinafter referred to as a flute cut) is formed is known (see, for example, Patent Document 1).

  FIG. 15 is a perspective view for explaining the configuration of the vehicular lamp described in Patent Document 1. FIG.

  As shown in FIG. 15, the vehicular lamp 300 described in Patent Document 1 includes a reflection surface 310, a lens 320 disposed in a reflection direction of reflected light from the reflection surface 310, a light source (not shown), and the like. Yes. The reflecting surface 310 is formed as a rotating paraboloid having a focal point set as a light source, for example, and a plurality of flute cuts 321 are formed in parallel on the lens 320.

  In the vehicular lamp 300 described in Patent Document 1, the irradiation light from the light source is converted into parallel rays by the reflecting surface 310 and reflected, enters the lens 320, and emits a plurality of flute cuts 321 in a line shape. In addition, the light is diffused and irradiated in the vertical direction or the horizontal direction.

JP 2001-67905 A

  However, since the flute cut 321 used in the vehicle lamp 300 described in Patent Document 1 is a simple kamaboko-shaped lens cut, the appearance at the time of lighting and non-lighting becomes uniform, and a new appearance is achieved. There is a problem that it is difficult to provide a lamp.

  This invention is made | formed in view of such a situation, and it aims at providing the lens and lamp which can comprise the lamp of the new appearance from which the appearance at the time of lighting and a non-lighting differs.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a lens used in a lamp, and includes at least a first lens cut and a second lens cut, and the first lens cut is an irradiation light from a light source. Is formed between two guide curves extending in one direction, and the second lens cut uses the light emitted from the light source as the desired light distribution. A lens cut for diffusing, which is formed between two guide curves extending in one direction, and the first lens cut is obtained by cutting the first lens cut along a plane perpendicular to the one direction. In addition, as the cutting position shifts from one end side to the other end side of the first lens cut, the lens cut in which the curve appearing between the two guide curves changes continuously. When the second lens cut is cut along a plane perpendicular to the one direction, the cutting position shifts from one end side to the other end side of the second lens cut. A straight line appearing between the two guide curves is formed as a lens cut that changes continuously.

  According to the first aspect of the present invention, when the first lens cut is cut by a plane orthogonal to the one direction, the cutting position shifts from one end side to the other end side of the first lens cut, The second lens cut is formed by cutting the second lens cut along a plane perpendicular to the one direction. The second lens cut is formed as a lens cut in which a curve appearing between two guide curves changes continuously. As the position shifts from one end side to the other end side of the second lens cut, it is formed as a lens cut in which a straight line appearing between the two guide curves changes continuously. That is, according to the first aspect of the present invention, the first and second lens cuts are formed as lens cuts in which a curve or a straight line appearing in the cross section changes continuously. However, it is possible to provide a lens capable of constituting a new-looking lamp having a different appearance.

  According to a second aspect of the present invention, in the first aspect of the present invention, when the first lens cut is cut along a plane perpendicular to the one direction, the cutting position is the first lens cut. As the lens cut shifts from one end side to the other end side, the curvature of the curve appearing between the two guide curves changes continuously, and is formed as a lens cut that returns to the original curvature again. In the two-lens cut, when the second lens cut is cut along a plane orthogonal to the one direction, the two guide curves are changed as the cutting position shifts from one end side to the other end side of the second lens cut. It is characterized in that it is formed as a lens cut in which the inclination angle of the straight line appearing during the period changes continuously and returns to the original inclination angle again.

  According to the invention described in claim 2, the first and second lens cuts are lens cuts in which the curvature of the curve appearing in the cross section or the inclination angle of the straight line changes continuously, and returns to the original curvature or inclination angle again. Is formed. For this reason, when paying attention to each cross section, the degree of refraction (diffusion) of the irradiation light from the light source that has reached the first and second lens cuts differs for each cross section.

  However, when paying attention to the entire lens, the curvature of the curve appearing on each cross section or the inclination angle of the straight line changes continuously, and again returns to the original curvature or inclination angle. Irradiated as diffused diffused light. For this reason, according to the invention described in claim 2, it is possible to form a predetermined light distribution pattern (particularly, a light distribution pattern spreading on the average in the left-right direction suitable for a vehicular lamp).

  According to the second aspect of the present invention, the first and second lens cuts are formed as lens cuts in which curves or straight lines appearing in the cross section continuously change and return to the original curvature or inclination angle again. Therefore, it is possible to change the appearance (appearance) of the lens so as to give a three-dimensional effect or movement according to the viewpoint position.

  According to the second aspect of the present invention, the first and second lens cuts are formed as lens cuts in which curves or straight lines appearing in the cross section continuously change and return to the original curvature or inclination angle again. Therefore, it is possible to cause a number of bright spots to appear on the center line of the lens cut according to the viewpoint position (particularly when the light source is turned on). That is, the appearance (appearance) of the lens can be changed according to the viewpoint position.

  According to the second aspect of the present invention, the first and second lens cuts are formed as lens cuts in which curves or straight lines appearing in the cross section continuously change and return to the original curvature or inclination angle again. Therefore, it is possible to give the lens a crystal feeling that the first and second lens cuts are shining with external light such as sunlight (particularly when the light source is not lit).

  According to the second aspect of the present invention, the first and second lens cuts are formed as lens cuts in which curves or straight lines appearing in the cross section continuously change and return to the original curvature or inclination angle again. Therefore, by using a lens colored in red or the like, it is possible to change the appearance (color density) of the lens. That is, the appearance (appearance) of the lens can be changed according to the viewpoint position.

  As described above, according to the second aspect of the present invention, the first and second lens cuts are formed as lens cuts in which a curve or a straight line appearing in the cross section changes continuously. It is possible to provide a lens that can constitute a new-looking lamp having a different time appearance.

  Moreover, according to the invention described in claim 2, the first lens cut is formed as a lens cut in which the curvature of the curve appearing between the two guide curves changes continuously and returns to the original curvature again. The second lens cut is formed as a lens cut in which the inclination angle of the straight line appearing between the two guide curves changes continuously and returns to the original inclination angle again. For this reason, it is possible to form a predetermined light distribution pattern (particularly, a light distribution pattern spreading in the left-right direction suitable for a vehicle lamp), and the appearance changes according to the viewpoint position (therefore, the viewpoint position is moved). However, it is possible to provide a lens that is easily visible (highly visible) and a lamp using the lens.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the first lens cut is a convex lens cut or a concave lens cut.

  According to the third aspect of the present invention, it is possible to provide a lens that can constitute a new-looking lamp having different appearances when lit and when not lit. Moreover, according to the invention described in claim 3, it is possible to form a predetermined light distribution pattern (particularly, a light distribution pattern spreading in the left-right direction suitable for a vehicular lamp), and depending on the viewpoint position. It is possible to provide a lens whose appearance changes (thus, easily visible (high visibility) even when the viewpoint position is moved) and a lamp using the lens.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, further comprising a plate-shaped basic lens portion, wherein the lens cut is formed on one surface of the basic lens portion. It is characterized by being.

  According to the fourth aspect of the present invention, it is possible to provide a lens that can constitute a new-looking lamp that is different in appearance when lit and when not lit. Moreover, according to the invention described in claim 4, it is possible to form a predetermined light distribution pattern (particularly, a light distribution pattern spreading in the left-right direction suitable for a vehicular lamp) and according to the viewpoint position. It is possible to provide a lens whose appearance changes (thus, easily visible (high visibility) even when the viewpoint position is moved) and a lamp using the lens.

  A fifth aspect of the invention includes the lens according to any one of the first to fourth aspects, a light source, and a reflector that reflects irradiation light from the light source toward the lens. .

  According to the fifth aspect of the present invention, when the first lens cut is cut by a plane orthogonal to the one direction, the cutting position shifts from one end side to the other end side of the first lens cut. The second lens cut is formed by cutting the second lens cut along a plane perpendicular to the one direction. The second lens cut is formed as a lens cut in which a curve appearing between two guide curves changes continuously. As the position shifts from one end side to the other end side of the second lens cut, it is formed as a lens cut in which a straight line appearing between the two guide curves changes continuously. That is, according to the invention described in claim 5, since the first and second lens cuts are formed as lens cuts in which curves or straight lines appearing in the cross section continuously change, the appearance at the time of lighting and at the time of non-lighting is obtained. However, it is possible to provide a lamp capable of forming a lamp having a new appearance.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the lens which can comprise the lamp | ramp of the new appearance from which the appearance at the time of lighting and a non-lighting differs, and a lamp using the said lens.

It is a perspective view of the lamp 100 containing the lens 10 which is 1st Embodiment of this invention. It is a side view of the lamp shown in FIG. It is a front view of lens 10 which is a 1st embodiment of the present invention. 1 is a perspective view of a lens 10 according to a first embodiment of the present invention. (A) The perspective view of the 1st and 2nd lens parts 11 and 12, (b) The front view of the 1st and 2nd lens parts 11 and 12. The cross sections AA to CC (and the results of ray tracing in the respective cross sections AA to CC) for each cutting position (for example, AA to CC in FIG. 3) when the lens 10 is cut along a plane orthogonal to the longitudinal direction will be described. It is sectional drawing for doing. It is a perspective view of the lamp 200 containing the lens 40 which is 2nd Embodiment of this invention. It is a front view of the lens 40 which is 2nd Embodiment of this invention. It is a perspective view of the lens 40 which is 2nd Embodiment of this invention. It is a front view of the lens 40 which is 2nd Embodiment of this invention. The cross sections AA to CC (and the results of ray tracing in the respective cross sections AA to CC) for each cutting position (for example, AA to CC in FIG. 8) when the lens 40 is cut along a plane orthogonal to the longitudinal direction will be described. It is sectional drawing for doing. It is a perspective view for demonstrating the modification of the lamps 100 and 200. FIG. It is a figure for demonstrating the modification of each lens cut 11a-16a. It is a figure for demonstrating the light distribution pattern formed with the lens 10 (or lens 40). It is a perspective view for demonstrating the structure of the conventional vehicle lamp.

  Hereinafter, a lens according to a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a lamp 100 including a lens 10 according to the first embodiment of the present invention. FIG. 2 is a side view of the lamp 100. FIG. 3 is a front view of the lens 10 according to the first embodiment of the present invention. FIG. 4 is a perspective view of the lens 10 according to the first embodiment of the present invention.

  A lamp 100 according to the present embodiment is applied to a vehicular lamp such as a stop lamp or a tail lamp, or a general lighting device other than a vehicular lamp. As illustrated in FIGS. 20, a light source 30 and the like.

  First, the lens 10 will be described.

  As shown in FIGS. 3 and 4, the lens 10 is a flat lens body (corresponding to the basic lens portion of the present invention) as a whole, and includes a plurality of first lens portions 11 and second lens portions 12. Yes. The first lens unit 11 and the second lens unit 12 are alternately arranged in parallel.

  First, the first lens unit 11 will be described.

  As shown in FIGS. 3 to 5, the first lens unit 11 is an elongated lens unit extending in one direction (in the drawings, the vertical direction is illustrated, hereinafter referred to as the longitudinal direction), and one surface (FIG. 4). , The rear surface in FIG. 5) and the other surface (the front surface in FIGS. 4 and 5). One surface (back surface in FIGS. 4 and 5) of the first lens portion 11 is formed as a flat surface, and a first lens cut 11a is formed on the other surface (front surface in FIGS. 4 and 5). The first lens unit 11 is integrally formed, for example, by injection molding a transparent or translucent material such as acrylic or polycarbonate.

  The first lens cut 11a is a lens cut for diffusing the light emitted from the light source 30 (or the reflected light collected by using the reflecting surface 20 or the like) as a desired light distribution, as shown in FIG. , Between two guide curves C1 and C2 extending in the longitudinal direction (FIG. 5 illustrates two symmetrical guide curves C1 and C2 whose both ends are straight (or substantially straight) and whose center is curved inward). Is formed.

  The first lens cut 11a will be described more specifically with reference to FIG.

  FIG. 6 shows a case where the lens 10 is cut along a plane perpendicular to the longitudinal direction, and the cross-sections AA to CC (and ray tracing in the respective sections AA to CC) at the cutting positions (for example, AA to CC in FIG. 3). Result).

  As shown in FIGS. 3 and 6, when the first lens cut 11a is cut along a plane perpendicular to the longitudinal direction, the cutting positions (for example, AA to CC in FIG. 3) are the first. As one lens cut 11a shifts from one end side 11a1 to the other end side 11a2, a curve appearing between the two guide curves C1 and C2 (cross section AA to CC. That is, an R-shaped convex curve indicated by reference numeral 11a in FIG. 6). ) Curvature (or size, lens thickness) continuously changes, and is formed as a lens cut that returns to the original curvature (or size, lens thickness) again.

  Specifically, as shown in FIG. 3 and FIG. 6, the first lens cut 11 a starts from the one end side 11 a 1 of the first lens unit 11 and starts toward the other end side 11 a 2 of the first lens unit 11. Curvature (or maximum size, maximum lens thickness) curve (section AA), intermediate curvature (or intermediate size, intermediate lens thickness) curve (section BB), minimum curvature (or minimum size, minimum lens thickness) It is formed as a lens cut in which a curve (cross section CC), a curve of intermediate curvature (or intermediate size, intermediate lens thickness), and a curve of maximum curvature (or maximum size, maximum lens thickness) appear.

  In the lens 10 having the above configuration, when attention is paid to one first lens cut 11a, the reflected light (parallel light rays) from the reflecting surface 20 that has reached the first lens cut 11a is in the horizontal direction in each of the cross sections AA to CC. It will diffuse (see FIG. 6).

  Next, the second lens unit 12 will be described.

  As shown in FIGS. 3 to 5, the second lens portion 12 is an elongated lens portion extending in one direction (in the drawings, the vertical direction is illustrated, hereinafter referred to as the longitudinal direction), and one surface (FIG. 4). , The rear surface in FIG. 5) and the other surface (the front surface in FIGS. 4 and 5). One surface (back surface in FIGS. 4 and 5) of the second lens portion 12 is formed as a flat surface, and a second lens cut 12a is formed on the other surface (front surface in FIGS. 4 and 5). The second lens unit 12 is integrally formed, for example, by injection molding a transparent or translucent material such as acrylic or polycarbonate.

  The second lens cut 12a is a lens cut (prism cut) for diffusing the irradiation light from the light source 30 (or the reflected light collected using the reflecting surface 20 or the like) as a desired light distribution. As shown in FIG. 5, two guide curves C3 and C4 extending in the longitudinal direction (FIG. 5 shows two symmetrical guide curves C3 and C4 whose both ends are straight (or substantially straight) and whose center is curved outward. For example).

  The second lens cut 12a will be described more specifically with reference to FIG.

  As shown in FIGS. 3 and 6, when the second lens cut 12a is cut along a plane perpendicular to the longitudinal direction, the cutting positions (for example, AA to CC in FIG. 3) are the first. As the two lens cuts 12a are shifted from one end side 12a1 to the other end side 12a2, straight lines appearing between the two guide curves C3 and C4 (cross sections AA to CC. That is, the curves C3 and C4 indicated by reference numeral 12a in FIG. 6). Two straight lines intersecting each other.) The inclination angle (or size, lens thickness) changes continuously, and it is formed as a lens cut that returns to the original inclination angle (or size, lens thickness) again. .

  Specifically, as shown in FIGS. 3 and 6, the second lens cut 12 a starts from the one end side 12 a 1 of the second lens portion 12 and starts toward the other end side 12 a 2 of the second lens portion 12. Straight line (cross section AA) with an inclination angle (or minimum size, minimum lens thickness), straight line (section BB) with an intermediate inclination angle (or intermediate size, intermediate lens thickness), minimum inclination angle (or maximum size, maximum lens thickness) It is formed as a lens cut in which a straight line of (thickness) (cross-section CC), a straight line of intermediate inclination angle (or intermediate size, intermediate lens thickness), and a straight line of maximum inclination angle (or minimum size, minimum lens thickness) appear.

  In the lens 10 having the above configuration, when attention is paid to one second lens cut 12a, the reflected light (parallel light rays) from the reflecting surface 20 that has reached the second lens cut 12a is left and right in each of the cross sections AA to CC. It will diffuse (see FIG. 6).

  Next, the reflecting surface 20 will be described.

  The reflection surface 20 is a reflection surface (reflector) for converting the radiated light from the light source 30 that has reached the reflection surface 20 into parallel rays and reflecting the parallel light toward the lens 10, and the light source 30 from the side of the light source 30. It is arrange | positioned in the range which covers the irradiation direction. For example, as shown in FIGS. 1 and 2, the reflecting surface 20 is a rotating paraboloid whose focal point is set in the vicinity of the light source 30. 1 and 2 are examples in which two reflecting surfaces 20 adjacent to the left and right are arranged in multiple stages (six stages are illustrated in FIGS. 1 and 2).

  Next, the light source 30 will be described.

  The light source 30 is, for example, an LED light source such as an LED package in which one or a plurality of LED chips of single color or RGB three colors are packaged, and the optical axis is inclined obliquely rearward as shown in FIGS. It is arranged in the state.

  According to the lens 10 having the above-described configuration, the first and second lens cuts 11a and 12a are formed as lens cuts whose cross sections continuously change. That is, the first lens cut 11a has a curvature (or size, lens thickness) of a curve (cross section AA to CC, that is, an R-shaped convex curve indicated by reference numeral 11a in FIG. 6) appearing between the two guide curves C1 and C2. (Thickness) continuously changes, and is formed as a lens cut that returns to the original curvature (or size, lens thickness) again (see FIGS. 3 and 6). The second lens cut 12a is a straight line appearing between the two guide curves C3 and C4 (cross-sections AA to CC. That is, two straight lines crossing through the curves C3 and C4 indicated by reference numeral 12a in FIG. 6). ) Is changed as a lens cut that continuously changes and returns to the original inclination angle (or size, lens thickness) (see FIGS. 3 and 6).

  As described above, the curvature of the curve appearing in the cross section (or size, lens thickness) or the inclination angle (or size, lens thickness) of the straight line of the first and second lens cuts 11a, 12a continuously changes, and again. It is formed as a lens cut that returns to the original curvature (or size, lens thickness) or tilt angle (or size, lens thickness). For this reason, when attention is paid to each cross section (for example, the cross sections AA and CC), the irradiation light from the light source 30 reaching the first and second lens cuts 11a and 12a is refracted (diffused) in the cross sections AA and CC, for example. Will be different (see FIGS. 3 and 6).

  However, when paying attention to the entire lens 10, the curvature of the curve or the inclination angle of the straight line appearing in each cross section (for example, the cross section AA to the cross section CC) changes continuously and returns to the original curvature or inclination angle again. Is irradiated as diffused light that diffuses on average in the left-right direction (left-right direction in FIG. 6). For this reason, according to the present embodiment, it is possible to form a predetermined light distribution pattern (particularly, a light distribution pattern that spreads on the average in the left-right direction suitable for a vehicular lamp) (see FIG. 15).

  Further, according to the lens 10 having the above-described configuration, the first and second lens cuts 11a and 12a are formed as lens cuts in which curves or straight lines appearing in the cross section continuously change and return to the original curvature or inclination angle again. Therefore, it is possible to change the appearance (appearance) of the lens 10 so as to give a three-dimensional effect and movement according to the viewpoint position.

  Further, according to the lens 10 having the above-described configuration, the first and second lens cuts 11a and 12a are formed as lens cuts in which curves or straight lines appearing in the cross section continuously change and return to the original curvature or inclination angle again. Therefore, as shown in FIG. 3, it is possible to cause a number of bright spots to appear on the center line of the lens cut 11a (indicated by a one-dot chain line in FIG. 3) according to the viewpoint position (particularly, When the light source 30 is turned on). That is, the appearance (appearance) of the lens 10 can be changed according to the viewpoint position.

  Further, according to the lens 10 having the above-described configuration, the first and second lens cuts 11a and 12a are formed as lens cuts in which curves or straight lines appearing in the cross section continuously change and return to the original curvature or inclination angle again. Therefore, it is possible to give the lens 10 a crystal feeling that the lens cuts 11a and 12a are shining with external light such as sunlight (particularly when the light source 30 is not lit).

  Further, according to the lens 10 having the above-described configuration, the first and second lens cuts 11a and 12a are formed as lens cuts in which curves or straight lines appearing in the cross section continuously change and return to the original curvature or inclination angle again. Therefore, by using the lens 10 colored in red or the like, the appearance (color shade) of the lens 10 can be changed. That is, the appearance (appearance) of the lens 10 can be changed according to the viewpoint position.

  As described above, according to the present embodiment, the first and second lens cuts 11a and 12a (corresponding to the first and second lens cuts of the present invention) have continuously changing curves or straight lines appearing in the cross section. Since the lens is formed as a lens cut (see FIG. 6), it is possible to provide a lens 10 and a lamp 100 using the lens 10 that can form a new-looking lamp that looks different when turned on and when not turned on. Is possible.

  Furthermore, according to the present embodiment, the first and second lens cuts 11a and 12a are formed as lens cuts in which curves or straight lines appearing in the cross section continuously change and return to the original curvature or inclination angle again. For this reason, according to this embodiment, it is possible to form a predetermined light distribution pattern (particularly, a light distribution pattern spreading in the left-right direction suitable for a vehicle lamp), and the appearance changes according to the viewpoint position. Therefore, it is possible to provide the lens 10 and the lamp 100 using the lens 10 that are easily visible (and thus easily visible (high visibility) even if the viewpoint position is moved).

  Next, a second embodiment will be described.

  FIG. 7 is a component configuration diagram of a lamp that is a second embodiment of the present invention.

  As in the first embodiment, the lamp 200 according to the present embodiment is applied to a vehicle lamp such as a stop lamp or a tail lamp, or a general lighting device other than the vehicle lamp, and as shown in FIG. The lens 40, the reflective surface 20, the light source 30, etc. are provided. Since the configuration other than the lens 40 is the same as that of the first embodiment, only the lens 40 will be described below.

  As shown in FIGS. 8 to 10, the lens 40 is a flat plate-like lens body as a whole, one surface (back surface in FIG. 9) is formed in a flat surface, and the other surface (front surface in FIG. 9) A plurality of third lens cuts 13a, fourth lens cuts 14a, fifth lens cuts 15a, and sixth lens cuts 16a are formed. Each lens cut 13a-16a is arrange | positioned in parallel (refer FIGS. 8-10). The lens 40 is integrally formed by, for example, injection molding a transparent or translucent material such as acrylic or polycarbonate.

  First, the third lens cut 13a will be described.

  The third lens cut 13a is a lens cut for diffusing the light emitted from the light source 30 (or the reflected light collected by using the reflecting surface 20 or the like) as a desired light distribution. As shown in the figure, it is formed between two guide curves C5 and C6 extending in the longitudinal direction (FIGS. 9 and 10 illustrate two symmetrical guide curves C5 and C6 curved outward).

  The third lens cut 13a will be described more specifically with reference to FIG.

  FIG. 11 shows the ray tracing in each of the sections AA to CC (and the sections AA to CC) for each cutting position (for example, AA to CC in FIG. 8) when the lens 40 is cut along a plane orthogonal to the longitudinal direction. Result).

  As shown in FIGS. 8 and 11, when the third lens cut 13a is cut along a plane orthogonal to the longitudinal direction, the third lens cut 13a has a cutting position (for example, AA to CC in FIG. 8). Curves appearing between the two guide curves C5 and C6 as the three lens cuts 13a are shifted from the one end side 13a1 to the other end side 13a2 (cross section AA to CC. That is, an R-shaped concave curve indicated by reference numeral 13a in FIG. 11) ) Curvature (or size, lens thickness) continuously changes, and is formed as a lens cut that returns to the original curvature (or size, lens thickness) again.

  Specifically, as shown in FIGS. 8 and 11, the third lens cut 13a starts from the one end side 13a1 of the third lens cut 13a and proceeds toward the other end side 13a2 of the third lens cut 13a. It is formed as a lens cut in which a concave curve with a size (cross section AA), a concave curve with a medium size (cross section BB), a concave curve with a maximum size (cross section CC), a concave curve with an intermediate size, and a concave curve with a minimum size appear.

  In the lens 40 having the above configuration, when attention is paid to one third lens cut 13a, the reflected light (parallel light rays) from the reflecting surface 20 that has reached the third lens cut 13a is in the horizontal direction in each of the cross sections AA to CC. It will diffuse (see FIG. 11).

  Next, the fourth lens cut 14a will be described.

  The fourth lens cut 14a is a lens cut for diffusing the irradiation light from the light source 30 (or the reflected light collected by using the reflecting surface 20 or the like) as a desired light distribution. As shown, it is disposed adjacent to the third lens cut 13a. As shown in FIGS. 9 and 10, the fourth lens cut 14a has two guide curves C7 and C8 extending in the longitudinal direction (FIG. 9 illustrates two guide curves C7 and C8 curved outward). It is formed between.

  The fourth lens cut 14a will be described more specifically with reference to FIG.

  As shown in FIGS. 8 and 11, when the fourth lens cut 14a is cut along a plane perpendicular to the longitudinal direction, the cutting positions (for example, AA to CC in FIG. 8) are the first. As the four-lens cut 14a shifts from one end side 14a1 to the other end side 14a2, an inclination angle of a straight line (cross section AA to CC, that is, a straight line indicated by reference numeral 14a in FIG. 11) appearing between the two guide curves C7 and C8. Is formed as a lens cut that continuously changes and returns to the original inclination angle again.

  Specifically, as shown in FIGS. 8 and 11, the fourth lens cut 14a is inclined from the one end side 14a1 of the fourth lens cut 14a toward the other end side 14a2 of the fourth lens cut 14a. A straight line having an angle of 0 ° (cross section AA), a straight line having a tilt angle of 30 ° (cross section BB), a straight line having a tilt angle of 45 ° (cross section CC),...

  In the lens 40 having the above configuration, when attention is paid to one fourth lens cut 14a, the reflected light (parallel light rays) from the reflecting surface 20 that has reached the fourth lens cut 14a is left and right in each of the cross sections AA to CC. It will diffuse (see FIG. 11).

  Next, the fifth lens cut 15a will be described.

  The fifth lens cut 15a is a lens cut for diffusing the irradiation light from the light source 30 (or the reflected light collected using the reflecting surface 20 or the like) as a desired light distribution. As shown, it is disposed adjacent to the fourth lens cut 14a. As shown in FIGS. 9 and 10, the fifth lens cut 15a has two guide curves C9 and C10 extending in the longitudinal direction (FIGS. 10 and 11 show two guide curves C9 and C10 curved outward). For example).

  The fifth lens cut 15a will be described more specifically with reference to FIG.

  As shown in FIGS. 8 and 11, when the fifth lens cut 15a is cut along a plane perpendicular to the longitudinal direction, the cutting positions (for example, AA to CC in FIG. 8) are the first. As the five-lens cut 15a is shifted from one end side 15a1 to the other end side 15a2, the inclination angle of a straight line (cross section AA to CC, that is, a straight line indicated by reference numeral 15a in FIG. 11) appearing between the two guide curves C9 and C10. Is formed as a lens cut that continuously changes and returns to the original tilt angle again.

  Specifically, as shown in FIGS. 8 and 11, the fifth lens cut 15a is inclined from the one end side 15a1 of the fifth lens cut 15a toward the other end side 15a2 of the fifth lens cut 15a. A straight line having an angle of 45 ° (cross section AA), a straight line having a tilt angle of 30 ° (cross section BB), a straight line having a tilt angle of 0 ° (cross section CC),...

  In the lens 10 having the above-described configuration, when focusing on one fifth lens cut 15a, the reflected light (parallel light rays) from the reflecting surface 20 that has reached the fifth lens cut 15a is horizontally moved in the cross sections AA to CC. It will diffuse (see FIG. 11).

  Next, the sixth lens cut 16a will be described.

  The sixth lens cut 16a is a lens cut for diffusing the light emitted from the light source 30 (or reflected light collected using the reflecting surface 20 or the like) as a desired light distribution. As shown in the figure, it is formed between two guide curves C11 and C12 extending in the longitudinal direction and intersecting (FIGS. 10 and 11 illustrate two symmetrical guide curves C11 and C12).

  The sixth lens cut 16a will be described more specifically with reference to FIG.

  As shown in FIGS. 8 and 11, when the sixth lens cut 16a is cut along a plane orthogonal to the longitudinal direction, the cutting positions (for example, AA to CC in FIG. 8) are the first. As the six lens cut 16a shifts from one end side 16a1 to the other end side 16a2, a curve appearing between the two guide curves C11 and C12 (cross section AA to CC. That is, an R-shaped concave curve indicated by reference numeral 16a in FIG. 11). ) Curvature (or size, lens thickness) continuously changes, and is formed as a lens cut that returns to the original curvature (or size, lens thickness) again.

  Specifically, as shown in FIGS. 8 and 11, the sixth lens cut 16a starts from the one end side 16a1 of the sixth lens cut 16a and decreases toward the other end side 16a2 of the sixth lens cut 16a. It is formed as a lens cut in which a concave curve having a size (cross section AA), a concave curve having a medium size (cross section BB), a concave curve having a maximum size (cross section CC), a concave curve having a medium size, and a concave curve having a minimum size appear.

  In the lens 40 configured as described above, when focusing on one sixth lens cut 16a, the reflected light (parallel light rays) from the reflecting surface 20 that has reached the sixth lens cut 16a is horizontally moved in each of the cross sections AA to CC. It will diffuse (see FIG. 11).

  According to the lens 40 having the above configuration, the third to sixth lens cuts 13a to 16a have continuous curvatures (or sizes and lens thicknesses) or linear inclination angles (or size and lens thicknesses) appearing in the cross section. It is formed as a lens cut that changes to the original curvature (or size, lens thickness) or tilt angle (or size, lens thickness) again. For this reason, when paying attention to each cross section (for example, cross sections AA and CC), the irradiation light from the light source 30 reaching the lens cuts 13a to 16a has different degrees of refraction (diffusion) between the cross section AA and the cross section CC, for example. (See FIGS. 8 and 11).

  However, when paying attention to the entire lens 40, the curvature of the curve or the inclination angle of the straight line appearing in each cross section (for example, the cross section AA to the cross section CC) changes continuously, and returns to the original curvature or inclination angle again. Is irradiated as diffused light that diffuses on average in the left-right direction (left-right direction in FIG. 12). For this reason, according to the present embodiment, it is possible to form a predetermined light distribution pattern (particularly, a light distribution pattern that spreads on the average in the left-right direction suitable for a vehicular lamp, see FIG. 14).

  Further, according to the lens 40 having the above-described configuration, each of the lens cuts 13a to 16a is formed as a lens cut in which a curved line or a straight line appearing in the cross section changes continuously and returns to the original curvature or inclination angle again. It is possible to change the appearance (appearance) of the lens 40 so as to give a three-dimensional effect and movement according to the position.

  Further, according to the lens 40 having the above-described configuration, each of the lens cuts 13a to 16a is formed as a lens cut in which a curve or a straight line appearing in the cross section changes continuously and returns to the original curvature or inclination angle. It is possible to give the lens 40 a crystal feeling that the lens cuts 13a to 16a are brilliantly illuminated by external light such as sunlight (particularly when the light source 30 is not lit).

  Further, according to the lens 40 having the above configuration, each of the lens cuts 13a to 16a is formed as a lens cut in which a curve or a straight line appearing in the cross section changes continuously and returns to the original curvature or inclination angle again. It is possible to change the appearance (color shade) of the lens 40 by using the colored lens 40. That is, the appearance (appearance) of the lens 40 can be changed according to the viewpoint position.

  As described above, according to the present embodiment, each of the lens cuts 13a to 16a (including the first and second lens cuts of the present invention) is formed as a lens cut in which a curve or a straight line appearing in the cross section changes continuously. Therefore, it is possible to provide a lens 40 that can form a new-looking lamp that is different in appearance when it is lit and when it is not lit, and a lamp 200 that uses the lens 40. .

  Further, according to the present embodiment, the third and sixth lens cuts 13a and 16a are formed as lens cuts in which the curvature of the curve appearing in the cross section continuously changes and returns to the original curvature again. The fifth lens cuts 14a and 15a are formed as lens cuts in which the inclination angle of the straight line appearing in the cross section changes continuously and returns to the original inclination angle again. For this reason, according to this embodiment, it is possible to form a predetermined light distribution pattern (particularly, a light distribution pattern spreading in the left-right direction suitable for a vehicle lamp), and the appearance changes according to the viewpoint position. Therefore, it is possible to provide the lens 40 and the lamp 200 using the lens 40 that are easily visible (and thus easily visible (high visibility) even if the viewpoint position is moved).

  Next, a modified example will be described.

  In the first and second embodiments, the lamp 10 (or the lamp 200) is formed by combining the lens 10 (or the lens 40) with the reflective surfaces 20 and the light sources 30 arranged in multiple stages shown in FIGS. 1 and 2 (or FIG. 7). However, the present invention is not limited to this. For example, as shown in FIG. 12, a lamp is configured by combining a lens 10, a single reflecting surface 50 (for example, a rotating paraboloid whose focal point is set to the bulb light source 60), and a bulb light source 60 such as an incandescent bulb. May be.

  In the first and second embodiments, the lens cuts 11a to 16a are described as being formed between the two guide curves C1 to C12 extending in the longitudinal direction. It is not limited. For example, each lens cut 11a to 16a may be formed between two ring-shaped or arc-shaped guide curves (for example, C1 and C2) extending in the circumferential direction as shown in FIG. In the case of a ring shape, for example, it is conceivable to arrange the lens cuts 11a to 16a concentrically.

  In the first and second embodiments, the lens cuts 11a to 16a are described as being formed between the guide curves C1 to C12 extending in one direction (in each figure, the vertical direction (longitudinal direction)). However, the present invention is not limited to this.

  For example, when a horizontally long lamp (or lamp) is configured, the lens cuts 11a to 16a may be formed between guide curves extending in the horizontal direction (short direction). Moreover, each lens cut 11a-16a may be formed between the guide curves extended not only in a perpendicular direction and a horizontal direction but in the diagonal direction.

  The above embodiment is merely an example in all respects. The present invention is not construed as being limited to these descriptions. The present invention can be implemented in various other forms without departing from the spirit or main features thereof.

DESCRIPTION OF SYMBOLS 100, 200 ... Lamp, 10 ... Lens, 11 ... Lens part, 11a ... 1st lens cut, 12 ... Lens part, 12a ... 2nd lens cut, 13a ... 3rd lens cut, 14a ... 4th lens cut, 15a ... 5th lens cut, 16a ... 6th lens cut, 20 ... reflective surface, 30 ... light source, 40 ... lens, 50 ... reflective surface, 60 ... bulb light source

Claims (5)

In lenses used for lamps,
Including at least a first lens cut and a second lens cut,
The first lens cut is a lens cut for diffusing irradiation light from a light source as a desired light distribution, and is formed between two guide curves extending in one direction,
The second lens cut is a lens cut for diffusing irradiation light from a light source as a desired light distribution, and is formed between two guide curves extending in one direction,
In the first lens cut, when the first lens cut is cut along a plane orthogonal to the one direction, as the cutting position shifts from one end side to the other end side of the first lens cut, the two lens cuts are performed. It is formed as a lens cut where the curve appearing between the guide curves changes continuously,
In the second lens cut, when the second lens cut is cut along a plane orthogonal to the one direction, as the cutting position shifts from one end side to the other end side of the second lens cut, the two lens cuts A lens formed as a lens cut in which a straight line appearing between guide curves changes continuously. In the first lens cut, when the first lens cut is cut along a plane orthogonal to the one direction, as the cutting position shifts from one end side to the other end side of the first lens cut, the two lens cuts are performed. The curvature of the curve that appears between the guide curves changes continuously, and is formed as a lens cut that returns to the original curvature again.
In the second lens cut, when the second lens cut is cut along a plane orthogonal to the one direction, as the cutting position shifts from one end side to the other end side of the second lens cut, the two lens cuts The lens is characterized by being formed as a lens cut in which the inclination angle of the straight line appearing between the guide curves changes continuously and returns to the original inclination angle again.   The lens according to claim 1, wherein the first lens cut is a convex lens cut or a concave lens cut. It is further equipped with a flat plate-shaped basic lens part,
The lens according to claim 1, wherein the lens cut is formed on one surface of the basic lens portion. A lens according to any one of claims 1 to 4,
A light source;
And a reflector that reflects the light emitted from the light source toward the lens.

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