Lighting device

Abstract

To make it difficult to see a shadow of a projection part in a lighting device, on the rear face of a lens body thereof, the projection part is formed.SOLUTION: An indoor lighting device 1 for an automobile comprises: a bezel 2 mounted to an opening of a roof trim; a substrate 3, on which an LED 7 for spot lighting is mounted; a retainer 4; a reflector 5; and a lens 6. The lens 6 integrally has a lens body 61, through which light of the LED 7 for spot lighting passes, and a lock part 65 projecting toward the bezel 2 from a rear face of the lens body 61. Lens cuts 62, 63 constituted by plural grooves crossing with each other are applied to a surface of the lens body 61. The lens cut 62 applied to a portion opposite to the lock part 65 is formed deeper than the lens cut 63 applied to other portions.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a lighting device. [Background technology]

[0002] A lighting device that is attached to the roof trim of an automobile to illuminate the inside of a passenger compartment is known. Fig. 12 is a diagram showing a conventional lighting device (see Patent Document 1).

[0003] 12 includes a bezel 502 attached to an opening 511 in a roof trim 510, a functional section 506 having a light source 505, and a lens 503. The bezel 502 has a first locking section 524 that is locked to the functional section 506. The lens 503 has a main body section 531 having a lens cut 533 on its back surface, and a second locking section 535 that stands from the back surface of the main body section 531 and is locked to the bezel 502. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-189022 A Summary of the Invention [Problem to be solved by the invention]

[0005] The lighting device 501 has a problem in that, when viewed from the passenger compartment side, the shadow of the second engaging portion 535 stands out, making the lighting device 501 unattractive.

[0006] SUMMARY OF THE PRESENT DISCLOSURE In view of the above, an object of the present invention is to make the shadow of a protrusion less noticeable in an illumination device in which a protrusion is formed on the rear surface of a lens body. [Means for solving the problem]

[0007] The present invention is an illumination device comprising a bezel, a lens assembled to the bezel, and a light source arranged between the bezel and the lens, wherein the lens faces the bezel and has a lens body that transmits light from the light source, and a protrusion that protrudes from the back surface of the lens body toward the bezel, wherein a lens cut consisting of a plurality of grooves that intersect with each other is applied to the surface of the lens body, and a portion of the surface of the lens body opposite the protrusion is applied with a lens cut that is deeper than other portions. Effect of the Invention

[0008] According to the present invention, the surface of the lens body is provided with a lens cut consisting of a plurality of intersecting grooves, and the portion of the surface of the lens body opposite the protrusion is provided with a lens cut that is deeper than other portions, thereby making it possible to make the shadow of the protrusion less noticeable and improving the appearance. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram showing an illumination device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is an exploded view of the lighting device of FIG. [Diagram 3] FIG. 2 is a bottom view of the lighting device of FIG. 1. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Diagram 5] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Figure 6] FIG. 6 is an enlarged view of a main part of FIG. 5. [Figure 7] FIG. 2 is a diagram showing the rear surface of the lens in FIG. [Figure 8] FIG. 2 is a diagram showing the surface of the lens in FIG. [Figure 9] FIG. 9 is an enlarged view of part D in FIG. [Figure 10] 2 is a photograph showing the appearance of the lighting device of FIG. 1. [Figure 11] 1 is a photograph showing the appearance of a lighting device of a reference example. [Figure 12] FIG. 1 is a diagram showing a conventional lighting device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A "lighting device" according to one embodiment of the present invention will be described with reference to FIGS.

[0011] 1 to 5, an automobile interior lighting device 1 as a "lighting device" is attached to the roof trim of an automobile to illuminate the passenger compartment. The automobile interior lighting device 1 includes a bezel 2 attached to an opening in the roof trim, a substrate 3, a retainer 4, a reflector 5, and a lens 6.

[0012] The bezel 2 has a disk-shaped upper wall 21, a side wall 22 depending down from the outer edge of the upper wall 21, a ring-shaped flange portion 23 extending outward from the lower end of the side wall 22, an engagement claw 24 connected to the side wall 22, and two locking arms 25 depending down from the upper wall 21.

[0013] The engaging claws 24 engage with the roof trim to fix the automobile interior lighting device 1 to the roof trim.

[0014] The two lock arms 25 are disposed at a distance from each other inside the side wall 22. As shown in Fig. 5, the lock arm 25 has a plate-shaped arm portion 25a that hangs down from the upper wall 21, and a protrusion 25b that protrudes from the lower end of the arm portion 25a.

[0015] In this specification, the expressions of the up-down direction such as "upper wall 21", "hanging down", and "lower end" are based on the up-down direction when the automobile interior lighting device 1 is attached to the roof trim.

[0016] The board 3 is a printed circuit board on which a plurality of spot lighting LEDs (Light Emitting Diodes) 7 as a "light source", a plurality of indirect lighting LEDs, electronic components, connectors, etc. are mounted. The board 3 is formed with two through holes 35 through which the lock arm 25 passes. The board 3 causes each LED to emit light by a current supplied from the vehicle side via the connector.

[0017] The retainer 4 propagates light from the indirect lighting LED mounted on the substrate 3 all around the automobile interior lighting device 1. The retainer 4 is formed in an annular shape and is sandwiched between the bezel 2 and the reflector 5.

[0018] The reflector 5 collects light from the spot lighting LEDs 7 mounted on the substrate 3 and efficiently transmits the light to the lens 6. The reflector 5 has a disk-shaped plate portion 51, a funnel-shaped light collecting portion 57 connected to the upper surface of the plate portion 51, and two recesses 56 formed concavely from the lower surface of the plate portion 51 and convexly upward.

[0019] 4, the plate portion 51 sandwiches the retainer 4 between it and the flange portion 23 of the bezel 2. The light of the indirect lighting LED mounted on the substrate 3 is propagated around the entire circumference of the automotive interior lighting device 1 by the retainer 4, and exits between the plate portion 51 and the flange portion 23 to illuminate the passenger compartment.

[0020] One light collecting section 57 is provided for each spot illumination LED 7, and five light collecting sections 57 are provided in total. As shown in Fig. 4, the light collecting section 57 surrounds the spot illumination LED 7. The plate section 51 has a circular opening where the light collecting sections 57 are connected. Light from the spot illumination LED 7 enters the lens 6 through this opening.

[0021] The two recesses 56 are each formed in an arc shape when viewed from below, and are disposed on the same circumference. The two recesses 56 are also disposed so as to surround the plurality of light collecting portions 57.

[0022] The lens 6 is made of a translucent synthetic resin. As shown in Figures 7 and 8, the lens 6 has a disk-shaped lens body 61, a locking portion 65 protruding from the upper surface of the lens body 61 (the back surface as viewed from the passenger compartment side), a protruding plate portion 68, and a rib 66. The locking portion 65 and the protruding plate portion 68 correspond to the "protruding portion."

[0023] The upper surface of the lens body 61 abuts against the lower surface of the plate portion 51 of the reflector 5. The lens body 61 faces the bezel 2, and sandwiches the substrate 3, the retainer 4, and the reflector 5 between the lens body 61 and the bezel 2. Each portion of the lens body 61 facing the spot lighting LEDs 7 is provided with a lens shape 67 for focusing direct light from the spot lighting LEDs 7. One lens shape 67 is provided for each spot lighting LED 7, with five lens shapes 67 provided in total. Light from the spot lighting LEDs 7 passes through the lens body 61 (mainly the lens shapes 67) to illuminate the passenger compartment.

[0024] The locking portion 65 is a plate-like member that stands vertically from the upper surface of the lens body 61 toward the bezel 2, and has a through hole 65a formed therein. Two locking portions 65 are provided.

[0025] The protruding plate portion 68 is in the form of a plate that stands vertically from the upper surface of the lens body 61 toward the bezel 2. The height of the protruding plate portion 68 is equal to that of the two locking portions 65. One protruding plate portion 68 is provided. The two locking portions 65 and the one protruding plate portion 68 are disposed with a gap between them.

[0026] A plurality of ribs 66 are provided. The plurality of ribs 66 are each formed in an arc shape when viewed from above. The plurality of ribs 66 are arranged on both sides of the two locking portions 65. The two locking portions 65, the one protruding plate portion 68, and the plurality of ribs 66 are arranged on the same circumference. In addition, the two locking portions 65, the one protruding plate portion 68, and the plurality of ribs 66 are arranged so as to surround the plurality of lens shapes 67.

[0027] The two locking portions 65, the one protruding plate portion 68, and the plurality of ribs 66 are fitted into the recessed portion 56 of the reflector 5. Also, as shown in FIG. 6, an opening is formed in the recessed portion 56 at a portion corresponding to the locking portion 65, through which the locking arm 25 of the bezel 2 passes into the recessed portion 56. The locking arm 25 passes through the through hole 35 of the substrate 3 and the opening of the reflector 5, and the protrusion portion 25b is disposed in the through hole 65a and engaged with the locking portion 65. That is, the locking portion 65 is engaged with the bezel 2. Also, the lens 6 is assembled to the bezel 2 by engaging the two locking arms 25 with the two locking portions 65.

[0028] 6, 8 and 9, the lower surface (the surface seen from the passenger compartment side) of the lens body 61 is provided with lens cuts 62 and 63. The lens cuts 62 and 63 are irregularities formed by carving a plurality of grooves 62b and 63b intersecting with each other into the lower surface of the lens body 61.

[0029] The lens cut 62 is formed by intersecting a plurality of grooves 62b each having a triangular cross section. Therefore, it can be said that the lens cut 62 is composed of a collection of quadrangular pyramids 62a each having an apex on the passenger compartment side. Similarly, the lens cut 63 is formed by intersecting a plurality of grooves 63b each having a triangular cross section. Therefore, it can be said that the lens cut 63 is composed of a collection of quadrangular pyramids 63a each having an apex on the passenger compartment side.

[0030] The depth of lens cut 62 (depth of groove 62b and height of pyramid 62a) is deeper than the depth of lens cut 63 (depth of groove 63b and height of pyramid 63a). The pitch of lens cut 62 is the same as the pitch of lens cut 63. That is, the width of groove 62b is the same as the width of groove 63b.

[0031] Such a lens cut 62 is made on the surface of the lens body 61 at a portion opposite to the two locking portions 65 and one protruding plate portion 68. That is, the lens cut 62 is made on the opposite side to portion C, which is the portion indicated by the dashed line in Fig. 7. The lens cut 63 is made in an annular shape, avoiding the lens cut 62.

[0032] As described above, the lens cut 62 on the side opposite the locking portion 65 and the protruding plate portion 68 is formed deeper than the lens cut 63 on the other side. Therefore, the reflection angle of the lens cut 62 is different from that of the lens cut 63, and the shadow of the locking portion 65 and the protruding plate portion 68 becomes less noticeable.

[0033] Fig. 10 is a photograph showing the appearance of the automobile interior lighting device 1. Fig. 11 is a photograph showing the appearance of an automobile interior lighting device 101 of a reference example. The automobile interior lighting device 101 of the reference example has the same configuration as the automobile interior lighting device 1, except that the lens body 61 does not have the lens cuts 62, 63. As is clear from the photographs of Figs. 10 and 11, by applying the above-mentioned lens cuts 62, 63 to the lens body 61, the automobile interior lighting device 1 can make the shadows of the lock portion 65 and the protruding plate portion 68 less noticeable, thereby improving the appearance.

[0034] In addition, the automobile interior lighting device 1 can turn on and off direct lighting by the spot lighting LEDs 7 and indirect lighting by the indirect lighting LEDs simultaneously or individually, allowing the interior of the passenger compartment to be brightened depending on the situation.

[0035] In the above embodiment, the lighting device is applied to an automobile. However, the lighting device of the present invention may be applied to a railway vehicle, a house, or the like.

[0036] The above-described embodiment merely shows a typical form of the present invention, and the present invention is not limited to this embodiment. In other words, the present invention can be embodied in various modifications without departing from the gist of the present invention. As long as the configuration of the present invention is still provided even with such modifications, it is of course included in the scope of the present invention. [Explanation of symbols]

[0037] 1. Automotive interior lighting equipment (lighting equipment) 2 Bezel 5. Reflector 6 Lenses 7 Spot lighting LED (light source) 61 Lens body 62,63 Lens Cut 65 Lock part (protruding part) 68 Protruding plate part (protruding part)

Claims

1. a bezel; a lens assembled to the bezel; and a light source disposed between the bezel and the lens; the lens has a lens body facing the bezel and transmitting light from the light source, and a protrusion protruding from a rear surface of the lens body toward the bezel, The surface of the lens body is provided with a lens cut formed of a plurality of grooves intersecting each other, A lens cut that is deeper than other portions is provided on the surface of the lens body on the opposite side to the protruding portion. A lighting device characterized by:

2. The protrusion is a locking portion that is engaged with the bezel.

2. The lighting device according to claim 1 .

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