Luminaire

Abstract

To provide a luminaire capable of holding a lens stably in a housing.SOLUTION: A luminaire 1 includes: a housing 5 storing an illumination member, mounted on an assembly member 101 and having an opening part 21 in which the opposite side from the assembly member 101 is opened; and a lens 7 assembled to the housing 5 via an engagement part 31 so as to close the opening part 21. The engagement part 31 includes: an insertion groove which is provided in the housing 5, in which the opening part 21 side is opened and which extends toward the assembly member 101 side; a slide groove 35 which is communicated with the insertion groove and which extends in the direction orthogonal to the extension direction of the insertion groove; and a slide protrusion 41 which is provided at the lens 7, and which can move being engaged with the insertion groove and the slide groove 35 according to the movement of the lens 7 with respect to the housing 5.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] Conventionally, a lighting device includes a housing that houses a lighting member and is attached to a ceiling plate as an attachment member, and has an opening on the side opposite the ceiling plate. Also known is a lighting device that includes a lens that is attached to the housing via an engagement portion so as to close the opening (see Patent Document 1). In this lighting device, the engagement portion between the housing and the lens includes an engagement claw portion provided on a side wall of the housing and an engagement recessed portion provided on a side wall of the lens with which the engagement claw portion is engaged. In this engagement portion, at least one of the side walls is elastically deformed when the lens is attached to the housing, and the engagement claw portion and the engagement recessed portion are engaged by restoration from the elastic deformation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-284025 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in a lighting device such as that disclosed in Patent Document 1, the engagement portion between the housing and the lens has an elastically deforming portion that undergoes elastic deformation. Therefore, when deformation occurs in the elastically deforming portion due to vibration, deterioration over time, or the like, the engagement portion may come out of engagement, and the lens may not be stably held in the housing.

[0005] The present invention has been made in view of the problems inherent in the conventional techniques, and an object of the present invention is to provide an illumination device capable of stably holding a lens in a housing. [Means for solving the problem]

[0006] The lighting device according to this embodiment comprises a housing which accommodates a lighting member and is assembled to an assembly member, the housing having an opening which is open on the side opposite the assembly member, and a lens which is assembled to the housing via an engagement portion so as to close the opening, the engagement portion having an insertion groove which is provided in the housing and opens on the opening side and extends toward the assembly member, a slide groove which is connected to the insertion groove and extends in a direction perpendicular to the extension direction of the insertion groove, and a slide protrusion which is provided on the lens and which can move while engaging with the insertion groove and the slide groove as the lens moves relative to the housing. Effect of the Invention

[0007] According to the present invention, it is possible to provide an illumination device in which a lens can be stably held in a housing. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a lighting device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the lighting device according to the embodiment. [Diagram 3] 4 is a cross-sectional view showing the state in which the lighting device according to the embodiment is attached to a ceiling. FIG. [Figure 4] 3 is a cross-sectional view of the lighting device according to the embodiment when it is attached to a ceiling. FIG. [Diagram 5] 4 is a front view of the lighting device according to the embodiment when the lens is attached to the housing. FIG. [Figure 6] 4 is a cross-sectional view of the lighting device according to the embodiment when the lens is attached to the housing. FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 5. [Figure 8] 4 is a cross-sectional view of the lighting device according to the embodiment when the lens is attached to the housing. FIG. [Figure 9] 1 is a cross-sectional view of a lighting device according to an embodiment of the present invention. [Figure 10]4 is a cross-sectional view of the lighting device according to the embodiment when a switch knob is pressed. FIG. [Figure 11] 10 is an enlarged cross-sectional view of a main part of the lighting device according to the embodiment when a switch knob is pressed to move a lens. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the lighting device according to the present embodiment will be described in detail with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for the convenience of explanation and may differ from the actual ratios.

[0010] 4, the lighting device 1 according to this embodiment is applied to, for example, a vehicle lighting device that illuminates the interior of a vehicle. The lighting device 1 is attached to, for example, a ceiling 101 as an attachment member in the vehicle interior. The lighting device 1 attached to the ceiling 101 is operated by, for example, a passenger in the vehicle.

[0011] As shown in FIGS. 1 to 11, the lighting device 1 includes an illumination member 3, a housing 5, and a lens .

[0012] As shown in Figs. 2, 3, 5, 9 to 11, the illumination member 3 has a circuit board 9 on which a circuit pattern is formed. On one side of the circuit board 9, a plurality of (two in this case) illumination units 11 made of LEDs or the like for illuminating the interior of the vehicle are provided. On the other side of the circuit board 9, a connector (not shown) electrically connected to the circuit pattern is provided. The connector supplies power to the circuit board 9, for example, by fitting with a vehicle-side connector (not shown) electrically connected to a power source of the vehicle. On one side of the circuit board 9, a plurality of (two in this case) switches 13 are provided, which are electrically connected to the illumination units 11 via the circuit pattern and turn on and off the illumination units 11.

[0013] 2, 3, 9 to 11, the switch 13 is, for example, a sealed switch in which a contact portion is integrally provided with a housing. The switch 13 turns on the irradiation portion 11 by, for example, pressing the contact portion, and turns off the irradiation portion 11 by, for example, pressing the contact portion again. The switch 13 is respectively assembled with a switch knob 15 that can come into contact with the contact portion.

[0014] As shown in Figs. 1 to 3 and 9 to 11, the switch knob 15 is made of an insulating material such as synthetic resin. The switch knob 15 covers the entire switch 13 and is formed in a housing shape with its inner surface abutting against a contact portion of the switch 13. The switch knob 15 is attached to the switch 13 via an engagement portion (not shown) so as to be movable in conjunction with the contact portion in a pressing direction of the contact portion of the switch 13. The switch knob 15 is pressed by, for example, a passenger in the vehicle, and presses the contact portion of the switch 13. The lighting member 3 is accommodated in the housing 5.

[0015] As shown in Figs. 1 to 11, the housing 5 is made of an insulating material such as synthetic resin. The housing 5 is formed in a casing shape that can be placed in a placement portion 103 formed by recessing the ceiling 101. The housing 5 has a bottom wall 17, a peripheral wall 19 extending from an edge of the bottom wall 17 toward the opposite side to the ceiling 101, and an opening 21 opening on the peripheral wall 19 on the opposite side to the bottom wall 17. A circuit board 9 is fixed to the surface of the bottom wall 17 of the housing 5 facing the ceiling 101 via a fixing portion (not shown). The circuit board 9 fixed to the bottom wall 17 is covered by a cover 23 that is attached to the housing 5 via an engagement portion so that a mating portion of the connector is exposed to the outside.

[0016] A pair of locking pieces 25, 25 are elastically deformably extended toward the ceiling 101 on the diagonal line of the circuit board 9 on the surface of the bottom wall 17 of the housing 5 on the ceiling 101 side. The pair of locking pieces 25, 25 are respectively engageable with a pair of locking holes 105, 105 formed penetrating the ceiling 101. The engagement between the locking pieces 25 and the locking holes 105 maintains the state in which the housing 5 is disposed in the disposition portion 103 of the ceiling 101. The bottom wall 17 of the housing 5 is formed with an irradiation opening 27 penetrating the bottom wall 17 to expose the irradiation portion 11 toward the interior of the vehicle. The bottom wall 17 of the housing 5 is provided with a knob disposition portion 29 in which the switch 13 and the switch knob 15 are disposed, which penetrates the bottom wall 17 and extends from the bottom wall 17 in a cylindrical shape toward the opposite side to the ceiling 101.

[0017] An insertion groove 33 and a slide groove 35 constituting an engagement portion 31 are provided at a plurality of locations (four locations in this example) on the inner surface of the peripheral wall 19 of the housing 5. The insertion groove 33 is opened on the inner surface of the peripheral wall 19 so that one end thereof communicates with the opening 21, and extends toward the ceiling 101 side so that the other end has a bottom. The slide groove 35 is opened on the inner surface of the peripheral wall 19 so that one end thereof communicates with the bottom of the insertion groove 33, and extends in a direction perpendicular to the extension direction of the insertion groove 33 so that the other end has a bottom. The lens 7 is attached to the housing 5 via the engagement portion 31.

[0018] As shown in Figs. 1 to 11, the lens 7 is made of an insulating material such as a transparent synthetic resin. The lens 7 is formed in a rectangular shape larger than the outer edge of the opening 21 of the housing 5 so as to be able to close the opening 21. The outer edge of the lens 7 protrudes continuously in the circumferential direction from the outer surface of the housing 5, and serves as a covering portion 37 that abuts against the outer surface of the ceiling 101 when the housing 5 is placed in the placement portion 103 of the ceiling 101. By abutting the covering portion 37 against the ceiling 101, the housing 5 is not exposed from the ceiling 101, and the housing 5 is not visible when the lighting device 1 is viewed from inside the vehicle cabin. This improves the appearance of the lighting device 1 relative to the ceiling 101.

[0019] A knob opening 39 is formed in the lens 7 so as to penetrate the lens 7 and expose the switch knob 15 to the inside of the vehicle cabin. As shown in FIG. 9, the switch knob 15 is disposed in the knob opening 39 so that the outer surface of the switch knob 15 faces the edge of the knob opening 39 when the switch knob 15 protrudes most from the housing 5. Therefore, when the lens 7 tries to move in the planar direction of the opening 21 of the housing 5, the outer surface of the switch knob 15 comes into contact with the edge of the knob opening 39, and the movement of the lens 7 is restricted. On the other hand, as shown in FIG. 10, when the switch knob 15 is pressed and moves toward the ceiling 101, the edge of the knob opening 39 is prevented from interfering with the outer surface of the switch knob 15. Therefore, as shown in FIG. 11, the outer surface of the switch knob 15 does not interfere with the edge of the knob opening 39, and the lens 7 can move in the planar direction of the opening 21 of the housing 5.

[0020] The lens 7 has slide protrusions 41 constituting the engagement portion 31 at a plurality of locations (four locations in this example) on the inner surface facing the peripheral wall 19 on the outer edge side of the lens 7. The slide protrusions 41 include a protruding wall 43 and an engagement wall 45. The protruding wall 43 is a member that is continuous with the lens 7 from the inner surface of the lens 7 and protrudes toward the housing 5. The width of the protruding wall 43 is set to be equal to or slightly shorter than the width of the insertion groove 33. The length of the protruding wall 43 is set to be longer than the length of the insertion groove 33. The engagement wall 45 is a member that is continuous with the protruding wall 43 and protrudes outward from the outer surface of the protruding wall 43 at the tip side of the protruding wall 43 and extends over the entire width of the protruding wall 43 so as to be parallel to the slide groove 35. The position of the engagement wall 45 relative to the protruding wall 43 is set to a position where the inner surface of the lens 7 abuts against the end of the opening 21 of the housing 5 when the engagement wall 45 is inserted into the insertion groove 33 and abuts against the bottom of the insertion groove 33 to coincide with the slide groove 35. The length of protrusion of the engagement wall 45 from the protruding wall 43 is set to be equal to or slightly shorter than the depth of the slide groove 35. The thickness (height) of the engagement wall 45 is set to be equal to or slightly thinner (lower) than the thickness (height) of the slide groove 35. The thickness (height) of the engagement wall 45 may be set to be slightly thicker (higher) than the thickness (height) of the slide groove 35 so that the engagement wall 45 is press-fitted into the slide groove 35.

[0021] The lens 7 is assembled to the housing 5 via the engagement portion 31. First, as shown in FIG. 6, the lens 7 is disposed relative to the housing 5 such that the engagement wall 45 of the slide protrusion 41 is positioned so as to be insertable into the insertion groove 33. Next, as shown in FIG. 7, the lens 7 is moved relative to the housing 5 until the engagement wall 45 of the slide protrusion 41 is inserted into the insertion groove 33 and abuts against the bottom of the insertion groove 33. Then, as shown in FIG. 8, the lens 7 moves while the engagement wall 45 of the slide protrusion 41 engages with the slide groove 35, and is moved relative to the housing 5 until it abuts against the bottom of the slide groove 35, and is assembled to the housing 5.

[0022] The engagement portion 31 between the housing 5 and the lens 7 does not need to have a portion that elastically deforms, because the engagement between the insertion groove 33 and the slide groove 35 and the slide protrusion 41 is performed by the movement of the lens 7 relative to the housing 5. Therefore, in the engagement portion 31, the portion that deforms due to vibration or deterioration over time can be suppressed and the engagement can be maintained, and the lens 7 can be stably held in the housing 5. In addition, although an external force such as vibration from the ceiling 101 is likely to be applied to the engagement portion 31 due to the contact between the covering portion 37 and the ceiling 101, the engagement portion 31 can stably receive the external force due to the engagement between the slide groove 35, which has rigidity, and the slide protrusion 41.

[0023] Here, the switch knob 15 is attached to the housing 5 after the lens 7 is attached to the housing 5. With the lens 7 attached to the housing 5, the switch knob 15 is inserted into the knob opening 39 and engaged with the switch 13. Therefore, when attaching the lens 7 to the housing 5, the outer surface of the switch knob 15 does not interfere with the edge of the knob opening 39, and the lens 7 can be moved relative to the housing 5. With the switch knob 15 attached to the housing 5, the outer surface of the switch knob 15 and the edge of the knob opening 39 are disposed opposite to each other, as shown in FIG. 9. Therefore, the movement of the lens 7 relative to the housing 5 can be restricted, and the attached state of the lens 7 to the housing 5 can be maintained.

[0024] On the other hand, when removing the lens 7 from the housing 5, one of the switch knobs 15 is pressed. As shown in Figs. 10 and 11, the pressed switch knob 15 is prevented from interfering with the edge of the knob opening 39. Therefore, the lens 7 can be moved relative to the housing 5 without interference between the outer surface of the switch knob 15 and the edge of the knob opening 39, and the lens 7 can be removed from the housing 5 by releasing the engagement of the engagement portion 31. Note that the switch knob 15 may be attached to the housing 5 before the lens 7 is attached to the housing 5, since the lens 7 can be moved by pressing the switch knob 15.

[0025] Such an illumination device 1 includes a housing 5 that houses the illumination member 3 and is assembled to a ceiling 101 as an assembly member, and has an opening 21 that is open on the side opposite to the ceiling 101. The housing 5 also includes a lens 7 that is assembled to the housing 5 via an engagement portion 31 so as to close the opening 21. The engagement portion 31 has an insertion groove 33 that is provided on the housing 5 and opens on the opening 21 side and extends toward the ceiling 101 side, and a slide groove 35 that communicates with the insertion groove 33 and extends in a direction perpendicular to the extension direction of the insertion groove 33. The engagement portion 31 also has a slide protrusion 41 that is provided on the lens 7 and is movable while engaging with the insertion groove 33 and the slide groove 35 as the lens 7 moves relative to the housing 5.

[0026] The engagement portion 31 does not need to have a portion that elastically deforms because the engagement between the insertion groove 33 and the slide groove 35 and the slide protrusion 41 is performed by the movement of the lens 7 relative to the housing 5. Therefore, the engagement portion 31 can maintain the engagement by suppressing the portions that deform due to vibration, deterioration over time, etc., and the lens 7 can be stably held in the housing 5.

[0027] Therefore, in such an illumination device 1, the lens 7 can be stably held in the housing 5.

[0028] The housing 5 also accommodates a switch 13 that turns on and off the illumination member 3 when pressed toward the inside of the housing 5, and a switch knob 15 that presses the switch 13. Furthermore, the lens 7 is provided with a knob opening 39 that penetrates the lens 7 and exposes the switch knob 15. When the switch knob 15 is pressed, interference with the edge of the knob opening 39 is avoided.

[0029] Therefore, by pressing the switch knob 15, interference between the switch knob 15 and the edge of the knob opening 39 is avoided, the lens 7 can be moved relative to the housing 5, and engagement or disengagement can be performed at the engagement portion 31. On the other hand, when the switch knob 15 is not pressed, interference between the switch knob 15 and the edge of the knob opening 39 restricts movement of the lens 7 relative to the housing 5, and the engagement of the engagement portion 31 can be maintained.

[0030] The lens 7 is also provided with a covering portion 37 that protrudes continuously in the circumferential direction from the outer surface of the housing 5 and abuts against the outer surface of the ceiling 101 .

[0031] Therefore, the covering portion 37 prevents the housing 5 from being exposed and visible from the ceiling 101, thereby improving the appearance of the lighting device 1 relative to the ceiling 101. In addition, although an external force such as vibration from the ceiling 101 is likely to be applied to the engaging portion 31 due to the contact between the covering portion 37 and the ceiling 101, the engaging portion 31 has rigidity and can stably withstand the external force.

[0032] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment.

[0033] For example, in the present embodiment, the mounting member is the ceiling of the vehicle interior, but the present invention is not limited to this, and the mounting member may be a side wall or a bottom wall of the vehicle interior.

[0034] Further, although there are two switches and switch knobs, the present invention is not limited to this, and there may be one switch and switch knob, or three or more switches and switch knobs, as long as the switches and switch knobs are provided in correspondence with the lighting members. [Explanation of symbols]

[0035] 1 Lighting equipment 3 Lighting materials 5. Housing 7 Lenses 13. Switch 15 Switch knob 21 Opening 31 Engagement part 33 Insertion groove 35 Slide groove 37 Covering section 39 Knob opening 41 Slide protrusion 101 Ceiling (assembly parts)

Claims

1. a housing that houses the lighting member and is attached to the attachment member, the housing having an opening that is open on a side opposite to the attachment member; a lens attached to the housing via an engagement portion so as to close the opening; Equipped with The engagement portion is an illumination device having an insertion groove provided in the housing that is open on the opening side and extends toward the mounting member, a slide groove that is connected to the insertion groove and extends in a direction perpendicular to the extension direction of the insertion groove, and a slide protrusion provided on the lens that is movable while engaging with the insertion groove and the slide groove as the lens moves relative to the housing.

2. The housing accommodates a switch that turns on and off the illumination member by a pressing operation toward the inside of the housing, and a switch knob that presses the switch, a knob opening penetrating the lens to expose the switch knob; The lighting device according to claim 1 , wherein the switch knob is prevented from interfering with an edge of the knob opening by a pressing operation.

3. 3. The lighting device according to claim 1, wherein the lens is provided with a covering portion that protrudes continuously in a circumferential direction from an outer surface of the housing and abuts against an outer surface of the mounting member.

Images