JP2018097981A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which can effectively prevent light leakage from an engagement place of components and in which positioning when installing components is easy.SOLUTION: A luminaire includes: a case having an engagement hole on a side wall; a lens module; an LED mounted on a substrate; and a cover including a light shielding plate for covering the engagement hole and the portion of the case around it. At the light shielding plate, a first engagement projection engaged with the engagement hole is provided in a protrusive manner. Direct light emitted from the LED or reflection light in which the direct light is reflected by the lens module and the like can be prevented from leaking from a gap between the first engagement projection and the engagement hole by the light shielding plate.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lighting device.

  An example of an exterior lamp having a light-emitting element such as an LED mounted on a substrate and a lens disposed immediately above the light-emitting element is described in Patent Document 1 (Japanese Patent Laid-Open No. 2012-221862). In the example shown in FIG. 1 of Patent Document 1, a circular convex lens is integrally formed on a lens cover made of a transparent or translucent synthetic resin material (see paragraph [0024] of Patent Document 1). The peripheral edge is ultrasonically welded to the engagement groove of the case (see the same paragraph [0027]). By engaging engagement claws provided on both outer sides of the case with engagement recesses of the attachment object, the exterior lamp is attached and fixed to the attachment object.

JP 2012-221862 A

  If there is a gap between the engagement claw of the case of the exterior lamp described in Patent Document 1 and the engagement recess of the attachment object, direct light from the light emitting element or the lens is caused by the lens through this gap. There is a possibility that the reflected light that has been reflected leaks to an unintended region outside the exterior lamp. In addition, when the exterior lamp described in Patent Document 1 is attached to an attachment object, it is necessary to align the attachment object on the surface of the lens cover, and there is room for improvement in attachment. In addition, when the engagement strength between the case and the mounting object by the engaging claw is not sufficient, the case and the mounting object in the engaged state are deformed by an external force, and the above-described light leakage is generated or promoted. There is a possibility.

  In view of the above problems, it is an object of the present invention to provide an illumination device that can effectively prevent light leakage from an engagement point of a component. Another object of the present invention is to provide an illumination device that can be easily positioned when components are attached.

The inventors of the present invention have intensively studied to solve the above problems, and as a result, have arrived at the various aspects of the present invention as follows.
That is, the lighting device according to the first aspect of the present invention includes a case having an engagement hole on the side wall, a lens module, an LED mounted on the substrate, and a light shielding covering the engagement hole and the surrounding case portion. And a cover provided with a plate, and a first engagement protrusion that engages with the engagement hole protrudes from the light shielding plate.
According to such a configuration, the light shielding plate can effectively prevent direct light emitted from the LED or reflected light reflected by the lens module or the like from leaking from the gap between the first engagement protrusion and the engagement hole. Can be prevented.

According to the second aspect of the present invention, in the illumination device, the light shielding plate protrudes toward the substrate side from the surface of the cover facing the substrate. According to such a configuration, the effect of preventing the light from leaking from the gap between the first engagement protrusion and the engagement hole can be further ensured. Further, since the light shielding plate can also function as a guide when the cover is attached to the case, the attachment of the cover to the case is improved.
According to the third aspect of the present invention, in the illumination device described above, a tapered surface is formed at the tip of the light shielding plate that protrudes toward the substrate. According to such a configuration, the function of the light shielding plate as a guide when the cover is attached to the case is improved.

According to the fourth aspect of the present invention, in the illumination device, the cover has a second engagement protrusion, and the case has an engaged portion with which the second engagement protrusion is engaged. The engagement direction of the first engagement protrusion with respect to the engagement hole and the engagement direction of the second engagement protrusion with respect to the engaged portion are the same. According to such a structure, compared with the case of engagement only by the first engagement protrusion, the engagement performance of the cover and the case is improved, and deformation due to the external force of the cover and the case in the engaged state can be suppressed. It is possible to reduce the possibility of occurrence or promotion of light leakage due to deformation.
According to the fifth aspect of the present invention, in the above illumination device, the substrate has a substantially rod-shaped pin, and the extending direction of the pin is an engagement direction of the first engagement protrusion with respect to the engagement hole. Orthogonal to According to such a configuration, even when an external force in the extending direction is applied to the pin when connecting or removing the pin and its connection object, the engagement state between the cover and the case can be stably maintained.

FIG. 1 is a perspective view of a lighting device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the lighting device according to the embodiment. FIG. 3 is an elevation view of the lighting device according to the embodiment. FIG. 4 is an elevation view of the cover of the lighting device according to the embodiment. 5A is a VA-VA cross-sectional view of the lighting device of FIG. 3, and FIG. 5B is a cross-sectional view of a lighting device according to a comparative example. FIG. 6 is a cross-sectional view of the lighting device of FIG. 3 taken along the line VI-VI.

Hereinafter, an illumination device according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a lighting device 1 according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the lighting device 1, and FIG. 3 is an elevation view of the lighting device 1. As illustrated in FIGS. 1 to 3, the lighting device 1 includes an LED 10, a lens unit 20 disposed on the light emitting side of the LED 10, a substrate 30 on which the LED 10 is mounted, an LED 10, the lens unit 20, and the substrate 30. It has a case 40 to be stored and a cover 50 attached to the back side of the case 40.
(Case)
Case 40 is an opaque synthetic resin (polybutylene terephthalate (PBT), acrylonitrile / ethylene / propylene / diene / styrene copolymer (AES), polypropylene (PP), polycarbonate (PC), acrylonitrile / butadiene / styrene copolymer ( ABS), PC-ABS, etc.), a substrate housing portion 40A mainly housing the lens unit 20 and the substrate 30, and a substantially rod-shaped pin 31 extending from one edge of the substrate 30 for connection to an external device. Is formed integrally with a pin storage portion 40B that mainly stores a substantially box-like shape. The case 40 has an opening on the back side (the side opposite to the light emission side), so that the lens unit 20, the substrate 30 on which the LED 10 is mounted, and the cover 50 are stored in one direction with respect to the case 40 in this order. be able to.

(LED)
As the LED 10 of this example, an LED element packaged as an SMD type (surface mount type) is used. As the LED 10 that emits white light, an LED that can obtain white light by mixing the light from the light emitting element and the light from the phosphor excited by the light is used. As an example of such a light-emitting element, an LED 10 using a blue light-emitting element and a phosphor that emits yellow to yellow-green fluorescence upon receiving light from the light-emitting element can be given. A purple light emitting element can also be used. In this case, it is preferable to use a phosphor that emits blue fluorescence by the light of the light emitting element, in addition to the phosphor emitting yellow to yellow-green fluorescence. This is because more preferable white light can be obtained by supplementing the blue component. The kind of fluorescent substance is not specifically limited, It can use regardless of an organic type and an inorganic type.

(Lens unit)
The lens unit 20 includes a lens portion 21 having a flat disk shape with a constant thickness, and a skirt portion 22 that extends toward the substrate 30 so as to hang down from the entire circumference of the outer edge of the lens portion 21. As a whole, it is formed in a cap shape. The LED 10 and the lens unit 20 are disposed so that the optical axis of the LED 10 is substantially orthogonal to the light incident surface of the lens unit 21. The lens part 21 is inserted into a cylindrical part 41 of the case 40. The tubular portion 41 has an opening, and light that enters the lens portion 21 from the LED 10 and is emitted from the lens portion 21 is emitted from the opening of the tubular portion 41 to the outside. The lens unit 20 may be positioned by sandwiching the skirt 22 between the case 40 and the substrate 30. The lens unit 20 is made of a transparent resin such as polycarbonate (PC) or acrylic resin (PMMA).

(cover)
FIG. 4 is an elevation view of the cover 50. The cover 50 is made of an opaque synthetic resin (polybutylene terephthalate (PBT), acrylonitrile / ethylene / propylene / diene / styrene copolymer (AES), polypropylene (PP), polycarbonate (PC), acrylonitrile / butadiene / styrene copolymer ( A main body 50A having a substantially rectangular parallelepiped shape and housed in the board housing portion 40A so as to face the surface of the substrate 30 opposite to the surface on which the LED 10 is mounted. A plate-like portion 50B that extends from near one edge of the surface opposite to the substrate 30 of 50A and fits into the opening portion of the pin housing portion 40B is integrally formed. The pin housing part 40B, the pin 31, and the plate-like part 50B are combined to function as a connector. Therefore, the end surface of the pin storage portion 40B in the direction in which the pins 31 extend has an opening for receiving the mating connector as a connection object. On the surface of the main body 51 on the substrate 30 side, a plurality of pressing protrusions 51 are provided so as to abut against and press the substrate 30.

  FIG. 5A is a VA-VA sectional view of the lighting device of FIG. In FIG. 4, an alternate long and short dash line (VA)-(VA) indicates to which position of the cover 50 the VA-VA cross section corresponds. As shown in FIGS. 2, 4, 5 (A), a pair of light shielding plates 52 are integrally formed on both outer side surfaces of the main body portion 50 </ b> A, and project further outward from the outer side surfaces of both light shielding plates 52. A pair of first engaging protrusions 53 are formed. The pair of first engaging protrusions 53 are respectively fitted into a pair of engaging holes 42 formed in a pair of opposing side walls of the case 40, whereby the cover 50 is attached and fixed to the case 40. The light shielding plate 52 is formed so as to have a shape and a position covering the engaging hole 42 and the inner surface portion of the case 40 around it. The front end portion of the light shielding plate 52 on the substrate 30 side protrudes toward the substrate 30 side from the main body portion 50A. A tapered surface 521 is formed on the outside of the front end portion of the light shielding plate 52 (that is, the side opposite to the main body portion 50A). Thus, the pair of light shielding plates 52 can also function as a guide when the cover 50 is inserted into the case 40.

Thus, in the illuminating device 1 according to the present embodiment, the cover 50 includes the light shielding plate 52, and the light shielding plate 52 covers the engaging hole 42 and the inner surface portion of the case 40 around the light shielding plate 52. In addition, the reflected light, which is reflected by the lens unit 20 or the like, is effectively prevented from leaking outside the illumination device 1 through the gap between the first engagement protrusion 53 and the engagement hole 42. be able to.
In relation to this, FIG. 5B shows a cross section of the illumination device 1 ′ according to the comparative example of the present invention. The cross section shown in FIG. 5B is a cross section of the illumination device 1 ′ of the comparative example corresponding to the cross section shown in FIG. 5A of the present embodiment. The cover 50 ′ of the lighting device 1 ′ of the comparative example does not have the light shielding plate 52 like the cover 50 of the lighting device 1 according to the present embodiment, and is directly engaged with the side surface of the main body portion 50A ′. A protrusion 53 'is provided. In the example shown in FIG. 5B, since the light shielding plate is not provided in the vicinity of the first engagement protrusion 53 ′, direct light emitted from the LED 10 or reflection in which the light is reflected by the lens unit 20 or the like. There is a possibility that light (for example, indicated by an arrow in FIG. 5B) leaks to the outside through a gap between the first engagement protrusion 53 ′ and the engagement hole 42.

  FIG. 6 is a cross-sectional view showing a VI-VI cross section of the lighting device 1 of FIG. 3. In FIG. 4, an alternate long and short dash line (VI)-(VI) indicates to which position of the cover 50 the VI-VI cross section corresponds. As shown in the drawing, the cover 50 protrudes from the plate-like portion 50B toward the inside of the case 40 at a position spaced apart from the pair of first engaging protrusions 53 in the longitudinal direction (that is, the extending direction of the pin 31) by a predetermined distance. A pair of second engaging protrusions 54 are provided. The arrangement direction of the pair of second engagement protrusions 54 is orthogonal to the longitudinal direction. Convex engagement claws 541 are formed on the outer surfaces of the pair of second engagement protrusions 54 (that is, both outer sides in the arrangement direction). A receiving portion 43 is formed on the inner portion of the case 40 and facing the second engaging protrusion 54, and a pair of engaging recesses is formed on a portion of the receiving portion 43 corresponding to the pair of engaging claws 541. 431 is formed. The pair of engagement claws 541 engage with the pair of engagement recesses 431, respectively, and contribute to the attachment and fixing of the case 40 and the cover 50.

  A recess 55 is formed between the pair of second engagement protrusions 54. When the cover 50 is attached to the case 40, the pair of second engagement protrusions 54 are elastically deformed to approach each other (that is, the recess 55). Narrows the width). When the engagement claw 541 enters the engagement recess 431, the second engagement projections 54 are elastically deformed in the direction of returning to the original shape, and are separated from each other (that is, the width of the recess 55 is expanded so as to return to the original). The engaging claw 541 engages with the edge of the engaging recess 431. The engaging claw 541 has an inclined portion on the surface opposite to the distal end side of the second engaging projection 54, and the inclined portion has an inclination closer to the distal end side of the second engaging projection 54 as it goes outward. doing. When the cover 50 and the case 40 are in the engaged state, the inclined portion of the engaging claw 541 is in a positional relationship in contact with the edge of the engaging recess 431. At this time, the inclined portions of the pair of engaging claws 541 are brought into a pair of engagements by the elastic force exerted so that the concave portion 55 returns to the original width, that is, in the direction in which the pair of second engaging protrusions 54 elastically expands. It is pressed toward both outer sides against the edge of the recess 431. The inclined portion of the engaging claw 541 and the edge of the engaging concave portion 431 exert a pressing force in an oblique direction, and this pressing force acts in a direction in which the cover 50 and the case 40 are attracted. Therefore, the engagement state between the cover 50 and the case 40 is stably maintained. As shown in FIG. 5A, the first engagement protrusion 53 may also have an inclined portion having the same configuration.

In the lighting device 1 according to the present embodiment, the cover 50 is engaged with the case 40 by using another pair of second engagement protrusions 54 in addition to the pair of first engagement protrusions 53. Therefore, the case 40 and the cover 50 can be engaged more stably and firmly. Therefore, even if an external force is applied to the case 40 and the cover 50 in the engaged state, the deformation can be effectively prevented, and the possibility of occurrence of light leakage or promotion due to the deformation can be more effectively reduced.
The direction in which the pair of first engagement protrusions 53 engage with the corresponding engagement holes 42 (the direction toward both outer sides) corresponds to the engagement claws 541 of the pair of second engagement protrusions 54 respectively. The engaging direction is the same as the direction in which the mating recess 431 is engaged, and the engaging direction is perpendicular to the extending direction of the pin 31. Therefore, even if an external force along the extension direction is applied to the pin 31 by connecting or removing the pin 31 and the connection target, the first engagement protrusion 53 and the first The influence of external force on the engagement state of the two engagement protrusions 54 can be suppressed, and as a result, the engagement state of the case 40 and the cover 50 can be stably maintained and deformation can be prevented. Therefore, the possibility of occurrence or promotion of light leakage due to deformation can be reduced more effectively.

The tip of the second engagement protrusion 54 protrudes toward the case 40 from the light shielding plate 52. Thus, when the cover 50 is inserted into the case 40, the second engagement protrusion 54 is first inserted into the opening of the case 40. Therefore, as positioning of the cover 50 with respect to the opening of the case 40, first, positioning along the alignment direction of the second engagement protrusions 54 is performed, and then positioning along a direction (longitudinal direction) orthogonal to the alignment direction. Thus, the cover 50 can be positioned with respect to the case 40 by two-dimensional one-dimensional positioning. As a result, in the manufacture of the lighting device 1 according to the present embodiment, the positioning operation is facilitated as compared with the case where the positioning is performed by a surface as in the conventional case.
Moreover, the effect which prevents the light leakage in the expansion | extension direction of the pin 31 from LED10 is acquired by having the receiving part 43 and the 2nd engagement protrusion 54, and engaging them.

  The present invention is not limited to the description of the embodiments of the invention and the modifications thereof. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.

1 Lighting device 10 LED
20 Lens unit 21 Lens part 22 Bottom part 30 Substrate 31 Pin 40 Case 40A Substrate storage part 40B Pin storage part 41 Tubular part 42 Engaging hole 43 Receiving part 431 Engaging recess (engaged part)
50 cover 50A main body 50B plate-like portion 51 pressing projection 52 light shielding plate 521 tapered surface 53 first engagement projection 54 second engagement projection 541 engagement claw 55 recess

Claims (5)

A lighting device,
A case having an engagement hole in the side wall;
A lens module;
An LED mounted on a substrate;
A cover provided with a light-shielding plate covering the engagement hole and a portion of the case around the engagement hole,
The lighting device, wherein the light shielding plate is provided with a first engagement protrusion that engages with the engagement hole.   The lighting device according to claim 1, wherein the light shielding plate protrudes toward the substrate from a surface of the cover facing the substrate.   The lighting device according to claim 2, wherein a tapered surface is formed at a tip portion of the light shielding plate that protrudes toward the substrate. The cover has a second engagement protrusion,
The case has an engaged portion with which the second engaging protrusion is engaged,
The engagement direction of the first engagement protrusion with respect to the engagement hole and the engagement direction of the second engagement protrusion with respect to the engaged portion are the same. The lighting device described. The substrate has a substantially rod-shaped pin,
The lighting device according to claim 1, wherein a direction in which the pin extends is orthogonal to an engagement direction of the first engagement protrusion with respect to the engagement hole.

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