Housing fixing mechanism and lighting device

Abstract

To provide a fixing mechanism of a housing which is easily assembled and can maintain an assembled state, and to provide a lighting device.SOLUTION: A fixing mechanism of a housing includes a first housing having a pair of first side portions and a second housing having a pair of second side portions, and is assembled by sliding the second housing with respect to the first housing such that the pair of second side portions are disposed inside the pair of first side portions, wherein a protrusion protruding toward the other of the pair of first side portions and the pair of second side portions is formed on one of the pair of first side portions and the pair of second side portions, A concave portion into which the convex portion is fitted is formed in the other, an engaging portion that engages with a peripheral edge portion of the concave portion is formed in the convex portion, and the engaging portion is inclined so as to be directed in a direction opposite to a sliding direction of the one at the time of assembly as being away from the one.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a fixing mechanism for a housing, and a lighting device including a housing having this fixing mechanism. [Background technology]

[0002] Conventionally, there has been known a lighting fixture in which a pair of main body end plates are connected to a main body cover using rivets (see, for example, Patent Document 1). Also, there has been known a lighting fixture in which an end cover is fixed to the end of the fixture body by screws (see, for example, Patent Document 2). Also, there has been known a lighting fixture in which a protrusion that passes through a hole and protrudes from the opposite surface of the side plate is bent and engaged with the periphery of the hole, thereby forming a box-like reflective member (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5375702 [Patent Document 2] Patent No. 5488830 [Patent Document 3] Patent No. 6078908 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, the components that make up a lighting device are often made from materials such as sheet metal or resin, and are often assembled by molding multiple components separately and joining them with rivets or screws, crimping the components together, or bending parts of the components. While this assembly method has the advantage of making the finished assembled product stronger, it has the disadvantage of increasing the amount of work required in the assembly process.

[0005] Lighting fixtures come in a variety of shapes depending on their purpose and use, so it is desirable that their structure and manufacturing process are not complicated. Fittings are easy to assemble, but the assembled parts often come loose. For example, a structure in which protrusions are created by embossing or other methods and fitted into fitting holes is often used. While these structures are easy to assemble, they have the problem of being difficult to maintain the assembled state because the fittings tend to come loose.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a housing fixing mechanism and a lighting device that can be easily assembled and maintained in an assembled state. [Means for solving the problem]

[0007] The fixing mechanism for a housing according to the present disclosure comprises a first housing having a first base and a pair of first side portions rising from the first base along a direction intersecting with the first base, and a second housing having a second base and a pair of second side portions rising from the second base along a direction intersecting with the second base, and is assembled by sliding the second housing relative to the first housing so that the pair of second side portions are positioned inside the pair of first side portions, wherein one of the pair of first side portions and the pair of second side portions is formed with a convex portion that protrudes toward the other of the pair of first side portions and the pair of second side portions, and the other is formed with a concave portion into which the convex portion is fitted, and the convex portion is formed with an engaging portion that engages with the peripheral portion of the concave portion, and the engaging portion is inclined so that the further it is from the one side, the more it faces in the opposite direction to the sliding direction of the one side during assembly.

[0008] The fixing mechanism for a housing according to the present disclosure comprises a first housing having a first base and a pair of first side portions rising from the first base along a direction intersecting with the first base, and a second housing having a second base and a pair of second side portions rising from the second base along a direction intersecting with the second base, and is assembled by sliding the second housing relative to the first housing so that the pair of first side portions are positioned inside the pair of second side portions, wherein the first housing is formed with a convex portion protruding from each of the pair of first side portions toward each of the pair of second side portions, and the second housing is formed with a concave portion into which the convex portion is fitted, the concave portion including the second base and each of the pair of second side portions, and when the convex portion is fitted into the concave portion, at least a portion of the first side portion overlaps with the peripheral portion of the concave portion at the second base when viewed in the direction in which the convex portion is fitted into the concave portion.

[0009] The lighting device according to the present disclosure includes a fixture having the housing fixing mechanism according to the present disclosure, and a lamp attached to the fixture. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to realize a housing fixing mechanism and a lighting device that can be easily assembled and maintained in an assembled state. [Brief explanation of the drawings]

[0011] [Figure 1] 3 is a perspective view showing the configuration of a fixing mechanism of a housing according to the first embodiment. FIG. [Figure 2] 3 is an exploded perspective view showing the configuration of a fixing mechanism of a housing according to the first embodiment. FIG. [Figure 3] FIG. 2 is a perspective view showing the configuration of a protrusion according to the first embodiment. [Figure 4] FIG. 2 is a perspective view showing the configuration of a protrusion according to the first embodiment. [Figure 5] FIG. 3 is a plan view showing the configuration of a convex portion according to the first embodiment. [Figure 6]FIG. 6 is a cross-sectional view showing the cross section VI-VI of FIG. 5. [Figure 7] FIG. 7 is a cross-sectional view showing the VII-VII cross section of FIG. 5. [Figure 8] 10 is a plan view showing the configuration of a convex portion according to Modification 1 of Embodiment 1. FIG. [Figure 9] FIG. 9 is a cross-sectional view showing a cross section taken along line IX-IX in FIG. 8. [Figure 10] FIG. 9 is a cross-sectional view showing the cross section XX in FIG. 8. [Figure 11] 10 is a plan view showing the configuration of a convex portion according to Modification 2 of Embodiment 1. FIG. [Figure 12] 10 is a plan view showing a configuration of a convex portion according to a third modification of the first embodiment. FIG. [Figure 13] FIG. 10 is a cross-sectional view showing the configuration of a protrusion according to the second embodiment. [Figure 14] FIG. 10 is a cross-sectional view showing the configuration of a protrusion according to the second embodiment. [Figure 15] FIG. 10 is a cross-sectional view showing the configuration of a convex portion according to a modified example of the second embodiment. [Figure 16] FIG. 11 is a front view showing the configuration of a protrusion according to a third embodiment. [Figure 17] FIG. 17 is a cross-sectional view showing the XVII-XVII cross section of FIG. [Figure 18] 1 is a perspective view of a housing having a fixing mechanism and a lighting device according to a first embodiment, viewed from the lighting space side. [Figure 19] FIG. 10 is an exploded perspective view of a housing having a fixing mechanism and a power supply device according to a second embodiment. [Figure 20] 10A and 10B are an overall perspective view and an enlarged perspective view of a P portion showing the configuration of a fixing mechanism of a housing according to a fourth embodiment. [Figure 21] 10 is an exploded perspective view showing the overall configuration of a fixing mechanism for a housing according to a fourth embodiment, and an enlarged perspective view of a P portion. FIG. [Figure 22] FIG. 13 is a perspective view showing the configuration of a fixing mechanism according to a second modification of the fourth embodiment. [Figure 23] FIG. 13 is a perspective view of a housing having a fixing mechanism and a lighting device according to an eighth embodiment, as viewed from the lighting space side. DETAILED DESCRIPTION OF THE INVENTION

[0012] Embodiments of the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to the following embodiments and can be modified in various ways without departing from the spirit and scope of the present disclosure. Furthermore, the present disclosure includes all possible combinations of the configurations shown in the following embodiments. In particular, the combinations of components are not limited to those in the respective embodiments, and components described in one embodiment can be applied to another embodiment. In the following description, terms indicating directions (e.g., "up," "down," "right," "left," "front," "rear," etc.) are used as appropriate to facilitate understanding, but these are for explanatory purposes and do not limit the present disclosure. In each drawing, components designated with the same reference numerals are identical or equivalent, and this applies throughout the entire specification. Note that the relative dimensional relationships or shapes of the components in the drawings may differ from those in actuality.

[0013] Embodiment 1 A fixing mechanism for a housing according to a first embodiment will be described. FIG. 1 is a perspective view showing the configuration of the fixing mechanism for a housing according to this embodiment. FIG. 1 shows the housing in an assembled state. FIG. 2 is an exploded perspective view showing the configuration of the fixing mechanism for a housing according to this embodiment. FIG. 2 shows the housing in an exploded state or in a state before assembly. FIGS. 3 and 4 are perspective views showing the configuration of a convex portion according to this embodiment. In FIGS. 3 and 4, dashed lines indicate a concave portion 110. FIG. 5 is a plan view showing the configuration of a convex portion according to this embodiment. FIG. 6 is a cross-sectional view showing the VI-VI cross section of FIG. 5. FIG. 7 is a cross-sectional view showing the VII-VII cross section of FIG. 5. FIG. 7 shows how the convex portion 120 engages with the concave portion 110.

[0014] As shown in FIGS. 1 to 7, the housing 1 of the first embodiment is composed of a first housing 10 and a second housing 15. The first housing 10 and the second housing 15 are formed of plate-like members. The first housing 10 has a first base 11 and a pair of first side portions 12. The first base 11 is formed in a planar shape including a first direction indicated by an arrow X and a second direction indicated by an arrow Y. Here, the first direction is along the longitudinal direction of the housing 1, and the second direction is along the lateral direction of the housing 1. In this embodiment, the first direction and the second direction are perpendicular to each other. A third direction indicated by an arrow Z is perpendicular to both the first direction and the second direction.

[0015] The pair of first side portions 12 rise from the first base portion 11 along a direction intersecting with the first base portion 11. More specifically, the pair of first side portions 12 extend in one direction of a third direction perpendicular to the first base portion 11, with an edge portion of the first base portion 11 parallel to the first direction as a base end. The pair of first side portions 12 are arranged side by side facing each other. The pair of first side portions 12 are arranged parallel to each other. In each of the first side portions 12, the end opposite the first base portion 11 is folded back outward.

[0016] The second housing 15 has a second base 16 and a pair of second side portions 17. The second base 16 is formed in a plane that includes a second direction indicated by arrow Y and a third direction indicated by arrow Z. The pair of second side portions 17 rise from the second base 16 along a direction that intersects with the second base 16. More specifically, the pair of second side portions 17 extend in one direction in a first direction perpendicular to the second base 16, with an edge portion of the second base 16 that is parallel to the third direction as its base end. The pair of second side portions 17 are arranged side by side so as to face each other. The pair of second side portions 17 are arranged parallel to each other.

[0017] The second housing 15 also has a pair of claws 19 and a flange 18. The pair of claws 19 and the flange 18 each rise up from the second base 16 in a direction intersecting with the second base 16. The pair of claws 19 are provided parallel to the pair of second side portions 17 and further outward than the pair of second side portions 17. The distance (distance) between the pair of claws 19 is wider than the distance (distance) between the pair of second side portions 17.

[0018] When the first housing 10 and the second housing 15 are assembled, the pair of second side portions 17 are arranged parallel to the pair of first side portions 12 so as to be located inside the pair of first side portions 12. The housing 1 has a fixing mechanism 100. The first housing 10 and the second housing 15 are maintained in an assembled state by the fixing mechanism 100.

[0019] A recess 110 is formed in each of the pair of first side portions 12. The recesses 110 are recessed in directions away from each other, i.e., in directions away from the corresponding second side portion 17. The recess 110 constitutes a part of the fixing mechanism 100. The periphery of the recess 110 is surrounded by a peripheral portion 111. In this embodiment, the recess 110 is formed as a through-hole that penetrates the first side portion 12. However, the recess 110 is not limited to this, and may have, for example, a bottomed cylindrical shape whose bottom is recessed in a direction away from the second side portion 17.

[0020] A protrusion 120 is formed on each of the pair of second side portions 17. The protrusions 120 protrude in directions away from each other, i.e., in directions toward the corresponding first side portion 12. The protrusions 120, together with the recesses 110, constitute the fixing mechanism 100. The protrusions 120 are provided at positions corresponding to the recesses 110 when the first housing 10 and the second housing 15 are assembled, and are fitted into the recesses 110. By fitting the protrusions 120 into the recesses 110, the first housing 10 and the second housing 15 are maintained in an assembled state. The protrusions 120 in this embodiment are formed by cutting and drawing. The protrusions 120 in this embodiment are formed so that a portion of the second side portion 17 protrudes outward.

[0021] The protrusion 120 has a shape in which a part of an embossed portion protruding in a hemispherical shape has been cut out. The cut surface 121 of the cutout functions as an engagement portion that engages with the peripheral edge 111 of the opposing recess 110. Here, the peripheral edge 111 of the recess 110 that engages with the cut surface 121 of the protrusion 120 may be referred to as an engagement edge 112.

[0022] The cut surface 121 of the protrusion 120 is located closer to the cutting line 170 of the second side portion 17 than the imaginary line connecting both ends E1, E2 of the cutting line. In other words, the cut surface 121 is inclined toward the peripheral edge 111 of the opposing recess 110. The inclination angle θ of the cut surface 121 with respect to the surface of the second side portion 17 is less than 90° (θ<90°). Here, the inclination angle θ is the angle including the cut-out portion. The height dimension H1 of the protrusion 120 from the second side portion 17 is greater than the thickness dimension D1 of the first side portion 12 (H1>D1).

[0023] In this way, the protrusion 120 of this embodiment has a shape in which a part of the embossed portion protruding in a hemispherical shape is cut away. The cut surface 121 of the protrusion 120 formed by cutting away the embossed portion is inclined toward the cutting line 170 in the second side portion 17.

[0024] Generally, the housings of fixtures and the like used in lighting devices are often made of sheet metal such as SPCC, SUS, etc. Conventionally, hemispherical (semi-dome shaped) embossments have often been used as the convex portions that make up the fixing mechanism.

[0025] Here, in the hemispherical embossing process, the sheet metal is extruded in the thickness direction. Therefore, for example, if a straight cutting line is provided on the sheet metal before processing and the extrusion process is performed, the cut surface is pulled in a direction away from the cutting line. Therefore, the cut surface of the hemispherical (half-dome-shaped) embossed portion formed by cutting out a portion tends to be inclined in the opposite direction (θ>90°) to the cut surface 121 of the first embodiment shown in Figures 5 to 7.

[0026] In the protrusions 120 shown in FIGS. 5 to 7, the cut surface 121 formed by cutting out a portion of the embossed portion is inclined forward toward the cutting line 170 in the second side portion 17. To achieve this shape, the extruded shape of the protrusions 120 is not a semicircle in plan view, but rather a shape that protrudes from the semicircle to the side opposite the arc-shaped bent portion, i.e., toward the cutout side. In other words, the cutting line provided on the sheet metal before processing is not a straight line, but a curved line that protrudes toward the cutout side. Furthermore, as shown in FIG. 5, the hemispherical (semi-dome-shaped) embossed portion is processed so that the dimensions L1 to L3 satisfy the relationship L1>L2>L3≧0.

[0027] The material of first housing 10 and second housing 15 may be resin or the like, and any method may be used to process protrusion 120. It is sufficient that cut surface 121 of protrusion 120 is inclined toward cut line 170 of second side portion 17 (θ<90°), or cut surface 121 may be perpendicular to the surface of second side portion 17 (θ=90°).

[0028] 2, the housing 1 of this embodiment can be easily assembled by sliding the second housing 15 relative to the first housing 10 in the direction of arrow A and fitting the protrusion 120 into the recess 110. At this time, the cut surface 121 of the protrusion 120, which is inclined toward the cutting line 170 of the second side portion 17, hooks onto the engagement edge 112 of the recess 110, thereby preventing the first housing 10 and the second housing 15 from easily coming apart. Hereinafter, the direction of arrow A may be referred to as the "sliding direction of the second housing 15" or the "sliding direction of the second side portion 17." Note that the sliding direction of the first housing 10 and the sliding direction of the first side portion 12 are opposite to the sliding direction of the second housing 15.

[0029] Here, the direction in which the first housing 10 and the second housing 15 are slid relative to each other during assembly depends on the shape of the first housing 10 or the second housing 15, as well as the direction of the protrusion 120 formed on the second side portion 17.

[0030] Furthermore, the fixing mechanism 100 may have recesses 110 formed on the pair of second side portions 17 and protrusions 120 formed on the pair of first side portions 12. In this case, the recesses 110 are recessed in directions toward each other, i.e., in directions away from the corresponding first side portions 12. The protrusions 120 protrude in directions toward each other, i.e., in directions toward the corresponding second side portions 17. With this configuration, the protrusions 120 do not protrude toward the outside of the housing 1, allowing the external dimensions of the housing 1 to be reduced.

[0031] By adopting the fixing mechanism 100 of this embodiment, it is possible to maintain a strong joint without using rivets, screws, etc., as in Patent Documents 1 and 2, or without using a crimping structure, and the engagement is less likely to come loose.

[0032] When the first housing 10 and the second housing 15 are assembled, the flange 18 of the second housing 15 is disposed on the outside of the first housing 10, and the claws 19 of the second housing 15 are inserted into the end of the first housing 10. Although not shown, a fixing mechanism 100 may be employed for the first base 11 of the first housing 10 and the flange 18 of the second housing 15.

[0033] Regarding the names of the "first side portions" and the "second side portions," in this embodiment, for convenience, the pair of side portions disposed on the outside are referred to as the pair of "first side portions," and the pair of side portions disposed inside the pair of "first side portions" are referred to as the pair of "second side portions." In the configuration of this embodiment, the pair of side portions 17 are disposed inside the pair of side portions 12, so the side portions 12 are the "first side portions," and the side portions 17 are the "second side portions." The fixing mechanism of this embodiment is also applicable to a configuration in which the pair of side portions 12 are disposed inside the pair of side portions 17. In that case, the side portions 17 are the "first side portions," and the side portions 12 are the "second side portions." Furthermore, in this embodiment, the housing having the "first side portions" is referred to as the "first housing," and the housing having the "second side portions" is referred to as the "second housing."

[0034] (Variation 1) Fig. 8 is a plan view showing the configuration of a convex portion according to Modification 1 of the present embodiment. Fig. 9 is a cross-sectional view showing the IX-IX cross section of Fig. 8. Fig. 10 is a cross-sectional view showing the XX cross section of Fig. 8. Fig. 10 shows how the convex portion 120 engages with the concave portion 110.

[0035] As shown in FIGS. 8 to 10, the convex portion 120 of the first modification has a shape in which a part of the embossed portion protruding in a cone shape is cut out. In the first modification, the embossed portion is composed of two flat surfaces. Each of the two flat surfaces forms a triangle. The embossed portion may also be composed of a curved surface. The cut surface 121 functions as an engaging portion that engages with the peripheral edge 111 of the opposing concave portion 110, i.e., the engaging edge 112.

[0036] (Variation 2) FIG. 11 is a plan view showing the configuration of a protrusion according to Modification 2 of the present embodiment. The cross section of the protrusion 120 of Modification 2 is similar to the cross section of the protrusion 120 of Modification 1 shown in FIGS. 9 and 10. As shown in FIG. 11, the protrusion 120 of Modification 2 has a shape in which a portion of the embossed portion protruding in a prismatic shape is cut out. In Modification 2, the embossed portion is composed of three flat surfaces. More specifically, the embossed portion is composed of one rectangular flat surface and two triangular flat surfaces connected to both ends of the rectangular flat surface. The embossed portion may be composed of a curved surface. The cut-out surface 121 functions as an engaging portion that engages with the peripheral edge 111 of the opposing recess 110, i.e., the engaging edge 112.

[0037] (Variation 3) FIG. 12 is a plan view showing the configuration of a protrusion according to Modification 3 of the present embodiment. The cross section of protrusion 120 of Modification 3 is similar to the cross section of protrusion 120 of Modification 1 shown in FIGS. 9 and 10. As shown in FIG. 12, in protrusion 120 of Modification 3, cutting line 170 provided on second side portion 17 consists of two straight lines that bend and extend in two directions. Notched cutting surface 121 of the embossed portion consists of two faces. Each of the two faces functions as an engaging portion that engages with peripheral edge 111, i.e., engaging edge 112, of the facing recess 110.

[0038] Embodiment 2 A fixing mechanism of a housing according to embodiment 2 will be described. Figures 13 and 14 are cross-sectional views showing the configuration of a convex portion according to this embodiment. Figure 13 shows a cross-section corresponding to Figure 6. Figure 14 shows a cross-section corresponding to Figure 7. Figure 14 shows how convex portion 120 engages with concave portion 110.

[0039] 13 and 14, the protrusion 120 of this embodiment is formed by a cut-and-raise process. The protrusion 120 consists of a single surface formed by cutting and raising a portion of the second side portion 17. Although not shown, the planar shape of the cut-and-raised portion can be a variety of shapes including polygons such as triangles and rectangles, as well as curves such as arcs. A surface 122 of the protrusion 120 that faces the periphery 111 of the recess 110 functions as an engaging portion that engages with the periphery 111 of the recess 110 that faces this surface 122, i.e., the engaging edge 112.

[0040] (Variation) FIG. 15 is a cross-sectional view showing the configuration of a protrusion according to a modified example of the present embodiment. FIG. 15 shows how the protrusion 120 engages with the recess 110. As shown in FIG. 15, in the protrusion 120 of this modified example, the cut surface 121 functions as an engagement portion that engages with the peripheral edge 111 of the opposing recess 110, i.e., the engagement edge 112. In this modified example, the height dimension H2 of the engagement portion is equal to or less than the thickness dimension D1 of the first side portion 12 (H2≦D1). In other words, the height dimension H2 of the engagement portion is equal to or less than the height dimension D1 of the recess 110 formed in the first side portion 12 (H2≦D1).

[0041] Embodiment 3 A fixing mechanism of a housing according to embodiment 3 will be described. Fig. 16 is a front view showing the configuration of a convex portion according to this embodiment. Fig. 17 is a cross-sectional view showing the XVII-XVII cross section of Fig. 16. Fig. 17 shows how convex portion 120 engages with concave portion 110.

[0042] 16 and 17, the processing method of the protrusions 120 is not limited to processing methods such as cutting and raising. In this embodiment, the protrusions 120 can be formed using methods such as injection molding using a resin material and three-dimensional modeling. Since the protrusions 120 of this embodiment have a solid structure, they are less likely to deform than the protrusions 120 formed by processing methods such as cutting and raising.

[0043] A specific example using the fixing mechanism 100 for the housing according to the first to third embodiments will be described.

[0044] Example 1 FIG. 18 is a perspective view of the housing having a fixing mechanism and the lighting device according to the first embodiment, as viewed from the lighting space side. FIG. 18 shows a state in which the lighting fixture 3 and the fixture 2 are separated. As shown in FIG. 18, the lighting device 5 is a so-called ceiling-mounted lighting device. The lighting device 5 includes the lighting fixture 3 for irradiating light into the lighting space and the fixture 2 as a housing for holding the lighting fixture 3 on a mounting portion such as a ceiling. The lighting fixture 3 is detachably attached to the fixture 2. Therefore, the lighting device 5 can be used by attaching lighting fixtures 3 with different specifications, such as color temperature or brightness, selected by a user or the like to the fixture 2.

[0045] The device 2 has a long device main body 20 and device end portions 21 provided at both longitudinal ends of the device main body 20. The device main body 20 corresponds to the first housing 10 in the above embodiment, and the device end portions 21 correspond to the second housing 15 in the above embodiment. When assembling the device main body 20 and the device end portions 21, the above-mentioned fixing mechanism 100 can be used.

[0046] The fixture body 20 is provided with a housing 22 that houses a part of the lighting fixture 3 when the lighting fixture 3 is attached. The housing 22 is provided with a power terminal block 23 and a fixture-side harness 24, which are paths for supplying power to the power supply device, and a connecting spring 25, which is a connector on the fixture 2 side for attaching the lighting fixture 3. The fixture body 20 is fixed to a hanging bolt using fasteners such as nuts and washers, and is thereby installed on a mounting portion such as a ceiling.

[0047] The fixture body 20 is not limited to this, and may be, for example, one that is embedded in a ceiling or one that is installed on a bar member that constitutes a system ceiling. In any lighting device, the above-described fixing mechanism 100 can be used to assemble multiple parts together.

[0048] Example 2 19 is an exploded perspective view of a housing having a fixing mechanism and a power supply device according to Example 2. The power supply device 4 is an example of an electronic device. The power supply device 4 includes a power supply circuit board 41 on which power supply circuit components 40 are mounted, and a power supply case 43 as a housing that covers the power supply circuit board 41. Although not shown, an insulating sheet may be disposed between the power supply circuit board 41 and the power supply case 43 in order to electrically insulate them from each other.

[0049] The power supply case 43 has a chassis (bottom case) 44 as a first housing to which the power supply circuit board 41 is attached, and a cover (top case) 45 as a second housing that covers the power supply circuit board. The chassis 44 corresponds to the first housing 10 in the above embodiment, and the cover 45 corresponds to the second housing 15 in the above embodiment. The chassis 44 has a bottom surface 440 and a pair of chassis side portions 441 as first sides. The cover 45 has a top surface 450 facing the bottom surface 440, and a pair of cover side portions 451 as second sides. The above-mentioned fixing mechanism 100 can be used to assemble the chassis 44 and the cover 45.

[0050] Each of the pair of chassis side portions 441 (first side portions) has a through-hole penetrating the chassis side portion 441 as a recess 110 recessed in a direction away from the opposing cover side portion 451 (second side portion). The recess 110 constitutes a fixing mechanism. Although the recess 110 is formed as a through-hole, the recess 110 is not limited to this, and may have, for example, a cylindrical shape with a bottom recessed in a direction away from the second side portion.

[0051] The pair of cover side portions 451 (second side portions) are formed with protrusions 120, parts of which protrude in directions approaching each other. The protrusions 120 constitute a fixing mechanism. The protrusions 120 are provided at positions corresponding to the recesses 110 when the chassis 44, which is the first housing, and the cover 45, which is the second housing, are assembled, and are fitted into the recesses 110. By fitting the protrusions 120 into the recesses 110, the chassis 44 and the cover 45 remain assembled together.

[0052] The chassis 44 and the cover 45 are primarily used to prevent the spread of fire. For this reason, it is desirable that the cover 45 remain attached to the chassis 44 during normal use, and that the cover 45 not come off the chassis 44.

[0053] Example 3 Although not shown in the figures, the above-mentioned fixing mechanism 100 can be used to attach a power supply case as a second housing arranged on one side to a base as a long, first housing of the lighting fixture 3, with the light source unit arranged on the other side.

[0054] Example 4 Although not shown in the figures, the above-mentioned fixing mechanism 100 can be used to attach the cover ends serving as the second housing, which are arranged at both ends of the base, to the elongated first housing of the lighting fixture.

[0055] Example 5 Although not shown in the figures, the above-mentioned fixing mechanism 100 can be used to attach a wiring fixture as a second housing arranged on the other side of a base as a long, first housing of a lighting fixture.

[0056] Example 6 Although not shown in the figures, the above-mentioned fixing mechanism 100 can be used to attach the lamp side connector as a second housing arranged on the other side of the base, which serves as a long, first housing of the lamp.

[0057] Example 7 Although not shown in the figures, the above-mentioned fixing mechanism 100 can be used to attach the fixture-side connector as a second housing for connecting to the lamp-side connector to the fixture as a long, first housing that the fixture has.

[0058] As described above, the housing fixing mechanism 100 according to the above embodiment includes a first housing 10 and a second housing 15. The first housing 10 has a first base 11 and a pair of first side portions 12 that rise from the first base 11 along a direction that intersects with the first base 11. The second housing 15 has a second base 16 and a pair of second side portions 17 that rise from the second base 16 along a direction that intersects with the second base 16. In the fixing mechanism 100, the second housing 15 is assembled by sliding it relative to the first housing 10 so that the pair of second side portions 17 are positioned inside the pair of first side portions 12.

[0059] Each of the pair of second side portions 17 has a protrusion 120 formed thereon that protrudes toward the pair of first side portions 12. The pair of second side portions 17 is an example of "one of the pair of first side portions and the pair of second side portions." The pair of first side portions 12 is an example of "the other of the pair of first side portions and the pair of second side portions." Each of the pair of first side portions 12 has a recess 110 formed thereon into which the protrusion 120 is fitted. The protrusion 120 has a cut surface 121 formed thereon that engages with a peripheral portion 111 of the recess 110. The cut surface 121 is an example of an engaging portion. The cut surface 121 is inclined in a direction opposite to the sliding direction (arrow A) of the pair of second side portions 17 during assembly, the farther away from the corresponding second side portion 17 it is.

[0060] According to this configuration, the cut surface 121, which is the engagement portion of the protrusion 120, is inclined forward relative to the peripheral edge 111 of the recess 110 in the direction opposite to the sliding direction of the pair of second side portions 17 during assembly. Therefore, even if a force in the direction opposite to the sliding direction is applied to the second side portion 17, the protrusion 120 is unlikely to come off the recess 110. Therefore, the assembled state can be maintained. Furthermore, assembly is easy because there is no need to use rivets, screws, or a caulking structure. This improves assembly performance and reduces costs.

[0061] In the housing fixing mechanism 100 according to the above embodiment, the first housing 10 and the second housing 15 are both plate-shaped. The protrusions 120 are formed by cutting and raising or cutting and drawing a portion of each of the pair of second side portions 17. At least a portion of the cut surface 121 is located closer to the cutting line 170 than an imaginary line connecting both ends E1, E2 of the cutting line 170 in the cutting and raising or cutting and drawing process.

[0062] According to this configuration, cut surface 121, which is the engagement portion of protrusion 120, is inclined forward relative to peripheral edge 111 of recess 110 in the direction opposite to the sliding direction of paired second side portions 17 during assembly. Therefore, the assembled state can be maintained more reliably.

[0063] In the fixing mechanism 100 for the housing according to the above embodiment, the height dimension H1 of the protrusion 120 is greater than the thickness dimension D1 of the first side portion 12.

[0064] According to this configuration, the protrusion 120 can be more reliably engaged with the periphery 111 of the recess 110.

[0065] In fixing mechanism 100 for a housing according to the above embodiment, when viewed in the direction in which convex portion 120 fits into concave portion 110 (for example, the vertical direction in FIG. 7), at least a part of cut surface 121 overlaps with peripheral edge portion 111.

[0066] According to this configuration, cut surface 121, which is the engagement portion of protrusion 120, is inclined forward relative to peripheral edge 111 of recess 110 in the direction opposite to the sliding direction of paired second side portions 17 during assembly. Therefore, the assembled state can be maintained more reliably.

[0067] In the fixing mechanism 100 for the housing according to the above embodiment, the recesses 110 are through holes formed in each of the pair of first side portions 12.

[0068] According to this configuration, the protrusion 120 can be more reliably engaged with the periphery 111 of the recess 110.

[0069] The lighting device 5 according to the above embodiment includes a fixture 2 having a fixing mechanism 100 for a housing according to the present embodiment, and a lighting fixture 3 attached to the fixture 2.

[0070] According to this configuration, the assembled parts in the housing 1 of the lighting device 5 are difficult to disassemble, and the assembled state can be maintained.

[0071] The power supply device 4 according to the above embodiment includes a power supply case 43 having a fixing mechanism 100 for a housing according to the present embodiment.

[0072] According to this configuration, the assembled parts in the power supply case 43 of the power supply device 4 are difficult to disassemble, and the assembled state can be maintained.

[0073] Embodiment 4 A fixing mechanism of the housing 1a according to the fourth embodiment will be described. Fig. 20 is an overall perspective view showing the configuration of the fixing mechanism 100a of the housing 1a according to the present embodiment, and an enlarged perspective view of the P portion. Fig. 20 shows the housing 1a in an assembled state. Fig. 21 is an exploded perspective view showing the overall configuration of the fixing mechanism 100a of the housing 1a according to the present embodiment, and an enlarged perspective view of the P portion. Fig. 21 shows the housing 1a in a disassembled state or before assembly.

[0074] 20 and 21, the housing 1a has a first housing 10a and a second housing 15a, both of which are plate-shaped. The housing 1a of the fourth embodiment is composed of two first housings 10a and two second housings 15a. The first housings 10a and the second housings 15a are each formed using a plate-shaped member.

[0075] The first housing 10a has a first base portion 11a and a pair of first side portions 12a. The first base portion 11a is formed in a plane including a first direction indicated by an arrow X and a second direction indicated by an arrow Y. Here, the first direction is along the longitudinal direction of the first housing 10a, and the second direction is along the lateral direction of the first housing 10a. In this embodiment, the first direction and the second direction are perpendicular to each other. A third direction indicated by an arrow Z is perpendicular to both the first direction and the second direction.

[0076] The pair of first side portions 12a rise from the first base portion 11a along a direction intersecting with the first base portion 11a. Specifically, the pair of first side portions 12a extend in one direction in a third direction perpendicular to the first base portion 11a, with an edge portion of the first base portion 11a parallel to the first direction as a base end. The pair of first side portions 12a are arranged side by side facing each other. The pair of first side portions 12a are arranged parallel to each other. The end of each of the first side portions 12a opposite the first base portion 11a is folded back outward.

[0077] The second housing 15a has a second base 16a and at least a pair of second side portions 17a. In the fourth embodiment, the second housing 15a has two pairs of second side portions 17a so that it can be fixed to two first housings 10a. The second base 16a is formed in a planar shape including the second direction indicated by the arrow Y and the third direction indicated by the arrow Z. The pair of second side portions 17a rise from the second base 16a along a direction intersecting with the second base 16a. Specifically, each pair (set) of second side portions 17a extends in one direction in the first direction perpendicular to the second base 16a, with an edge portion of the second base 16a parallel to the third direction as its base end. The pair of second side portions 17a are arranged side by side facing each other. The pair of second side portions 17a are arranged parallel to each other.

[0078] Second housing 15a also has flange 18a, which is folded back from second base 16a to the opposite side of second side 17a along a direction intersecting with second base 16a.

[0079] When the first housing 10a and the second housing 15a are assembled, the pair of first side portions 12a are arranged parallel to the pair of second side portions 17a so as to be positioned inside the pair of second side portions 17a. In other words, the pair of second side portions 17a are arranged outside the pair of first side portions 12a and parallel to the pair of first side portions 12a. The housing 1a has a fixing mechanism 100a. The first housing 10a and the second housing 15a are maintained in an assembled state by the fixing mechanism 100a.

[0080] A pair of first side portions 12a of first housing 10a are each formed with a protrusion 120. Protrusions 120 protrude in directions away from each other, i.e., in directions toward the corresponding second side portion 17a. Protrusions 120 form part of fixing mechanism 100a.

[0081] Furthermore, protruding pieces 123 are formed on both ends of the pair of first side portions 12a in the first direction. The pair of protruding pieces 123 protrude outward from both ends of first side portion 12a in the first direction so that their tip ends face opposite each other. Protruding pieces 123, together with protruding portion 120, constitute part of fixing mechanism 100a.

[0082] In the second housing 15a, recesses 110a are formed at each corner where the second base portion 16a and the second side portions 17a are connected. Each recess 110a is formed so as to straddle a part of the second base portion 16a and a part of the pair of second side portions 17a. The recesses 110a, together with the protrusions 120 and the protruding pieces 123, constitute a part of the fixing mechanism 100a.

[0083] The recess 110a is surrounded by a peripheral edge 111a. The peripheral edge 111a is formed by connecting a base peripheral edge 113 on the second base 16a side and a side peripheral edge 114 on the second side 17a side. In this embodiment, each recess 110a is formed as a single through-hole that penetrates the second base 16a and the second side 17a. However, the recess 110a is not limited to a single through-hole, and may be, for example, formed of a plurality of through-holes.

[0084] The protrusion 120 is provided at a position corresponding to the recess 110a when the first housing 10a and the second housing 15a are assembled, and is fitted into the recess 110a. By fitting the protrusion 120 into the recess 110a, the first housing 10a and the second housing 15a are maintained in an assembled state. The protrusion 120 of this embodiment is formed by cutting and drawing. The protrusion 120 of this embodiment is formed so that a part of the first side portion 12a protrudes outward.

[0085] The protrusion 120 has a shape in which a part of an embossed portion protruding in a hemispherical shape has been cut out. The cut surface 121 of the cut surface functions as an engagement portion that engages with the side peripheral edge 114 of the facing recess 110a. Here, the protrusion 120 may be referred to as an engagement portion. Furthermore, the side peripheral edge 114 of the peripheral edge 111a of the recess 110a that engages with the cut surface 121 of the protrusion 120 may be referred to as an engagement edge. Note that the protrusion 120 that serves as the engagement portion may adopt the aspects described in the first to third embodiments and the respective modified examples.

[0086] When first housing 10a and second housing 15a are assembled, protruding piece 123 is provided at a position corresponding to recess 110a and is fitted into recess 110a. By fitting protruding piece 123 into recess 110a, the pair of first side portions 12a do not deform in a direction to approach each other, and therefore the engagement between protrusion 120 and side peripheral portion 114 is maintained without being released.

[0087] The surface of the protruding piece 123 facing the base peripheral edge 113 functions as an engaging portion that engages with the base peripheral edge 113 of the recess 110a. Since the pair of protruding pieces 123 are restricted from moving toward each other by engaging with the base peripheral edge 113, the pair of first side portions 12a do not deform in a direction toward each other. Here, the protruding piece 123 may be referred to as a restricting portion. Furthermore, the base peripheral edge 113 of the peripheral edge 111a of the recess 110a that engages with the protruding piece 123 may be referred to as a restricting edge portion.

[0088] In the present embodiment, protruding piece 123 entirely protrudes outward from second base 16a when first housing 10a and second housing 15a are assembled, but this is not limiting. Protruding piece 123 may be formed so that at least a portion thereof overlaps base peripheral edge 113 when viewed in the direction in which convex portion 120 fits into concave portion 110a, and therefore protruding piece 123 may be formed so that a portion thereof protrudes outward from second base 16a.

[0089] 21, the housing 1a of this embodiment can be easily assembled by sliding the second housing 15a relative to the first housing 10a in the direction of arrow A and fitting the convex portion 120 serving as an engaging portion and the protruding piece 123 serving as a restricting portion into the concave portion 110a. At this time, the pair of protruding pieces 123 serving as restricting portions are restricted from moving toward each other by the base peripheral portion 113 serving as a restricting edge, so that the pair of first side portions 12a of the first housing 10a are not deformed. Therefore, the housing 1a can prevent the first housing 10a and the second housing 15a from easily coming apart.

[0090] As described above, the housing fixing mechanism 100a according to this embodiment includes a first housing 10a and a second housing 15a. The first housing 10a has a first base 11a and a pair of first side portions 12a that rise from the first base 11a along a direction that intersects with the first base 11a. The second housing 15a has a second base 16a and a pair of second side portions 17a that rise from the second base 16a along a direction that intersects with the second base 16a. The housing 1a is assembled by sliding the second housing 15a relative to the first housing 10a so that the pair of first side portions 12a are positioned inside the pair of second side portions 17a.

[0091] A protrusion 120 is formed on the first housing 10a. The protrusion 120 protrudes from each of the pair of first side portions 12a toward each of the pair of second side portions 17a. A recess 110a is formed on the second housing 15a. The recess 110a is formed to include the second base portion 16a and one of the pair of second side portions 17a. The protrusion 120 is fitted into the recess 110a. When the protrusion 120 is fitted into the recess 110a, at least a portion of the first side portion 12a (for example, the protruding piece 123) overlaps with the peripheral edge portion 113 of the second base portion 16a of the recess 110a when viewed from the direction in which the protrusion 120 fits into the recess 110a.

[0092] With this configuration, at least a portion of first side portion 12a overlaps with peripheral edge 113 of second base portion 16a of recess 110a, which prevents pair of first side portions 12a from deforming in a direction toward each other. Therefore, protrusion 120 remains fitted in recess 110a, preventing first housing 10a and second housing 15a from coming off.

[0093] (Variation 1) In the fourth embodiment, the protruding piece 123 protrudes outward beyond the second base 16a of the second housing 15a when the first housing 10a and the second housing 15a are assembled. The protruding piece 123a according to the first modification differs from the protruding piece 123 according to the fourth embodiment in that the tip of the protruding piece 123a does not protrude outward beyond the second base 16a of the second housing 15a. When viewed in the direction in which the convex portion 120 fits into the concave portion 110a, the protruding piece 123a need only be formed to overlap the base peripheral portion 113, and the tip of the protruding piece 123a does not necessarily have to protrude outward beyond the second base 16a of the second housing 15a. The protruding dimension of the protruding piece 123a thus formed is, for example, equal to or less than the thickness of the second base 16a of the second housing 15a.

[0094] According to the fixing mechanism 100a of the first modified example, the protruding piece 123a does not protrude outward beyond the second base portion 16a, which has the effect of improving workability and safety during installation and contributing to the simplification of packaging specifications.

[0095] (Variation 2) Fig. 22 is a perspective view showing the configuration of a fixing mechanism 100b according to Modification 2 of Embodiment 4. Fig. 22(a) shows the state before assembly, and Fig. 22(b) shows the state after assembly. As shown in Fig. 22, first housing 10b according to Modification 2 differs from first housing 10a according to Embodiment 4 in that it does not have protruding piece 123. Furthermore, second housing 15b according to Modification 2 differs from second housing 15a according to Embodiment 4 in that it has second protrusion 130.

[0096] When the first housing 10b and the pair of second housings 15b are assembled, the second protrusions 130 provided on the pair of second housings 15b each protrude inward from the second base 16b in the first direction. The second protrusions 130 formed on each of the pair of second housings 15b protrude in directions approaching each other. The second protrusions 130, together with the protrusions 120, constitute a part of the fixing mechanism 100b.

[0097] Each of the pair of second protrusions 130 is provided at a position corresponding to each of the pair of first side portions 12a when first housing 10b and second housing 15b are assembled. That is, each of the pair of second protrusions 130 is provided at a position facing each of the pair of first side portions 12a. Therefore, the pair of first side portions 12a do not deform in a direction toward each other, and the engagement between protrusions 120 and side peripheral portions 114 is maintained without being released.

[0098] The surfaces of each of the pair of first side portions 12a facing the second protrusion 130 function as engagement portions that engage with the second protrusion 130. Each of the pair of first side portions 12a engages with a base peripheral portion 113b, a portion of which protrudes in an arc-like shape, and is thereby restricted from moving toward each other, so the pair of first side portions 12a do not deform in a direction toward each other. Here, the surfaces of each of the pair of first side portions 12a facing the second protrusion 130 may be referred to as restriction portions. Furthermore, of the peripheral portion 111b of the recess 110b, the base peripheral portion 113b that constitutes the second protrusion 130 and engages with the first side portion 12a may be referred to as restriction edges.

[0099] The fixing mechanism 100b according to the second modification has the same effect as the fixing mechanism 100a according to the first modification, and since there is no need to provide a protruding piece on the first housing 10b, it has the effect of improving the moldability of the first housing 10b and contributing to resource conservation.

[0100] A specific example using the fixing mechanisms 100a and 100b for the housing according to the fourth embodiment and the first and second modifications of the fourth embodiment will be described.

[0101] Example 8 Fig. 23 is a perspective view of a housing having a fixing mechanism and a lighting device according to Example 8, viewed from the lighting space side. A schematic configuration of lighting device 5a will be described with reference to Fig. 23. Fig. 23 illustrates a state in which the equipment plate 7 of lighting device 5a has been removed to expose the internal equipment arrangement section 28, and the portion to the right of the equipment arrangement section 28 has been disassembled. The portions to the right and left of the equipment arrangement section 28 of lighting device 5a have generally similar configurations.

[0102] The lighting device 5a is a so-called two-lamp grid lighting device. As shown in FIG. 23, the lighting device 5a includes two lighting fixtures 3a, a fixture 2a, a lighting fixture housing 22a, a light shielding device 26, and an equipment plate 7. The lighting fixture 3a emits light into the lighting space. The fixture 2a includes a housing 1a for holding the lighting fixture 3a on a support member 8, such as a bar member constituting a system ceiling, which is an example of a mounting portion. The lighting fixture housing 22a is fixed to the fixture 2a. The lighting fixtures 3a are attached to the lighting fixture housing 22a. The light shielding device 26 is disposed on the light emission side of each lighting fixture 3a. The equipment plate 7 is disposed between the two lighting fixtures 3a. The fixture 2a includes a fixture main body 20a, which is a first housing 10a, 10b, and a fixture end portion 21a, which is a second housing 15a, 15b. Although not shown, the lighting device 5a may be provided with a power supply device for supplying lighting power to the lamp 3a, and in this case, the power supply device is supplied with, for example, commercial AC power from an external power source provided outside the lighting device 5a. Note that the light shielding device 26 and the equipment plate 7 may be omitted.

[0103] The lamp housing 22a is provided with a connecting spring 25. Although not shown, the lamp 3a is provided with a spring receiver that engages with the connecting spring 25. The lamp 3a is attached to the lamp housing 22a by engaging the connecting spring 25 with the spring receiver, and is removed from the lamp housing 22a by disengaging the connecting spring 25 from the spring receiver. In other words, the lamp 3a can be detachably attached to the fixture 2a without using tools or the like. Therefore, the lighting device 5a can be used by attaching lamps 3a with different specifications, such as color temperature or brightness, selected by the user or the like to the fixture 2a.

[0104] The configuration of the lighting device 5a is not limited to the above configuration. For example, the fixture 2a does not have to be a component of the lighting device 5a, and a lighting device including a lamp housing 22a and lamps 3a may be attached to a fixture of an existing facility. Also, for example, in FIG. 23, the lighting device 5a includes two lamps 3a and the same number of lamp housings 22a and light shielding devices 26 as the number of lamps 3a, but the number of lamps 3a, lamp housings 22a, and light shielding devices 26 may be one, three, or more. Also, for example, the light shielding devices 26 may be configured in a manner other than a louver.

[0105] The recess 110a in the fixing mechanism 100a of the housing according to the above embodiment and the recess 110b in the fixing mechanism 100b are through holes formed in each of the pair of second side portions 17a.

[0106] According to this configuration, the restricting portion on the first side portion 12a is restricted from moving toward each other by the restricting edge portion on the second base portion 16a or the second base portion 16b, so that the convex portion 120 can more reliably engage with the peripheral portion 114 of the concave portion 110a or the concave portion 110b.

[0107] The lighting device 5a according to the above embodiment includes a fixture 2a having a fixing mechanism 100a or 100b for a housing according to the present embodiment, and a lighting fixture 3a attached to the fixture 2a.

[0108] According to this configuration, the assembled parts in the housing 1a of the lighting device 5a are difficult to disassemble, and the assembled state can be maintained.

[0109] Various aspects of the present disclosure are described below.

[0110] (Appendix 1) a first housing having a first base and a pair of first side portions rising from the first base along a direction intersecting the first base; a second housing having a second base and a pair of second side portions rising from the second base along a direction intersecting the second base, a fixing mechanism for a housing that is assembled by sliding the second housing relative to the first housing so that the pair of second side portions are disposed inside the pair of first side portions, a protrusion protruding toward the other of the pair of first side portions and the pair of second side portions is formed on one of the pair of first side portions and the pair of second side portions, The other of the two has a recess formed therein into which the protrusion is fitted, The protrusion has an engaging portion formed thereon that engages with a peripheral edge of the recess, A fixing mechanism for a housing, wherein the engaging portion is inclined so that the further away from the one side it is, the more it faces in a direction opposite to the sliding direction of the one side during assembly. (Appendix 2) The first housing and the second housing are both plate-shaped, the protrusion is formed by cutting and raising or cutting and drawing a part of the one of the first and second plates, A fixing mechanism for a housing described in Appendix 1, wherein at least a portion of the engagement portion is located closer to the cutting line than an imaginary line connecting both ends of the cutting line in the cutting and bending process or the cutting and squeezing process. (Appendix 3) The fixing mechanism for a housing according to claim 1 or 2, wherein the height dimension of the convex portion is greater than the thickness dimension of the other of the convex portions. (Appendix 4) 4. The fixing mechanism for a housing according to claim 3, wherein at least a portion of the engagement portion overlaps with the peripheral edge portion when viewed in the direction in which the convex portion fits into the concave portion. (Appendix 5) The fixing mechanism for a housing according to claim 1 or 2, wherein the height dimension of the engagement portion is equal to or less than the thickness dimension of the other. (Appendix 6) 6. The fixing mechanism for a housing according to any one of claims 1 to 5, wherein the recess is a through hole formed in the other of the two. (Appendix 7) a first housing having a first base and a pair of first side portions rising from the first base along a direction intersecting the first base; a second housing having a second base and a pair of second side portions rising from the second base along a direction intersecting the second base, a fixing mechanism for a housing that is assembled by sliding the second housing relative to the first housing so that the pair of first side portions are disposed inside the pair of second side portions, The first housing has a protrusion formed thereon that protrudes from each of the pair of first side portions toward each of the pair of second side portions, the second housing is formed with recesses into which the protrusions are fitted so as to include the second base portion and each of the pair of second side portions; A fixing mechanism for a housing in which, when viewed in the direction in which the convex portion is fitted into the recess, at least a portion of the first side portion overlaps with the peripheral portion of the second base portion of the recess when the convex portion is fitted into the recess. (Appendix 8) An appliance having a housing fixing mechanism according to any one of Supplementary Note 1 to Supplementary Note 7; a lighting fixture attached to the fixture; A lighting device comprising: [Explanation of symbols]

[0111] REFERENCE SIGNS LIST 1,1a housing, 2,2a fixture, 3,3a lighting fixture, 4 power supply unit, 5,5a lighting device, 7 equipment plate, 8 support member, 10,10a,10b first housing, 11,11a first base, 12,12a first side, 15,15a,15b second housing, 16,16a,16b second base, 17,17a second side, 18,18a flange, 19 claw, 20,20a fixture body, 21,21a fixture end, 22,22a lighting fixture housing, 23 power terminal block, 24 fixture side harness, 25 connecting spring, 26 light blocking device, 28 facility equipment arrangement section, 40 power supply circuit components, 41 power supply circuit board, 43 power supply case, 44 chassis, 45 Cover, 100, 100a, 100b fixing mechanism, 110, 110a, 110b recess, 111, 111a, 111b peripheral portion, 112 engaging edge portion, 113, 113b base peripheral portion, 114 side peripheral portion, 120 convex portion, 121 cutting surface, 122 surface, 123, 123a protruding piece, 130 second convex portion, 170 cutting line, 440 bottom surface portion, 441 chassis side portion, 450 top surface portion, 451 cover side portion, E1 end portion, E2 end portion.

Claims

1. a first housing having a first base and a pair of first side portions rising from the first base along a direction intersecting the first base; a second housing having a second base and a pair of second side portions rising from the second base along a direction intersecting the second base, a fixing mechanism for a housing that is assembled by sliding the second housing relative to the first housing so that the pair of second side portions are disposed inside the pair of first side portions, a protrusion protruding toward the other of the pair of first side portions and the pair of second side portions is formed on one of the pair of first side portions and the pair of second side portions, The other of the two has a recess formed therein into which the protrusion is fitted, The protrusion has an engaging portion formed thereon that engages with a peripheral edge of the recess, A fixing mechanism for a housing, wherein the engaging portion is inclined so that the further away from the one side it is, the more it faces in a direction opposite to the sliding direction of the one side during assembly.

2. The first housing and the second housing are both plate-shaped, the protrusion is formed by cutting and raising or cutting and drawing a part of the one of the first and second plates, The fixing mechanism for a housing according to claim 1 , wherein at least a part of the engaging portion is located closer to the cutting line than an imaginary line connecting both ends of the cutting line in the cutting and bending process or the cutting and squeezing process.

3. 3. The fixing mechanism for a housing according to claim 1, wherein the height dimension of the protrusion is greater than the thickness dimension of the other of the protrusions.

4. The fixing mechanism for a housing according to claim 3 , wherein at least a portion of the engaging portion overlaps with the peripheral edge portion when viewed in a direction in which the convex portion fits into the concave portion.

5. 3. The fixing mechanism for a housing according to claim 1, wherein the height dimension of the engaging portion is equal to or smaller than the thickness dimension of the other engaging portion.

6. 3. The fixing mechanism for a housing according to claim 1, wherein the recess is a through hole formed in the other of the housings.

7. a first housing having a first base and a pair of first side portions rising from the first base along a direction intersecting the first base; a second housing having a second base and a pair of second side portions rising from the second base along a direction intersecting the second base, a fixing mechanism for a housing that is assembled by sliding the second housing relative to the first housing so that the pair of first side portions are disposed inside the pair of second side portions, The first housing has a protrusion formed thereon, the protrusion protruding from each of the pair of first side portions toward each of the pair of second side portions, the second housing is formed with recesses into which the protrusions are fitted so as to include the second base portion and each of the pair of second side portions; A fixing mechanism for a housing in which, when viewed in the direction in which the convex portion is fitted into the recess, at least a portion of the first side portion overlaps with the peripheral portion of the second base portion of the recess when the convex portion is fitted into the recess.

8. an appliance having the housing fixing mechanism according to claim 1 or 7; a lighting fixture attached to the fixture; A lighting device comprising:

Images