Fixing mechanism, lighting apparatus and fixing method

Abstract

To provide a fixing mechanism for fixing an attachment tool along a groove of a pedestal without making it slide.SOLUTION: A fixing mechanism 100 comprises: a pedestal 10 having an arrangement part 11 having a short direction and a longitudinal direction; and an attachment tool 30 having a substantially-rectangular fixing plate 38 fixed to the arrangement part 11. The arrangement part 11 has: a groove part 13 formed so that a depth direction of a groove 16 is oriented to the outside in a short direction; and an installation part 18 for installing the attachment tool 30 in a direction opposite to the depth direction of the groove 16. A width L2 of the fixing plate 38 in a short direction is equal to or shorter than a length L4 of the installation part 18 in a short direction, the fixing plate 38 has an outer end part 33 fit into the groove 16 of the groove part 13 at an end part in a longitudinal direction, and at least a single half of the outer end part 33 exists in a range in which a distance from a center C1 of the installation part 18 in a short direction is equal to or shorter than a total length R3 of a half R4 of the length L4 of the installation part 18 in the short direction and a depth D of the groove 16 of the groove part 13.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present disclosure relates to a fixing mechanism, a lighting device, and a fixing method. [Background technology]

[0002] Conventionally, a fixing mechanism for fixing a mounting tool to a base has been known (for example, Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-086688 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 describes a fixing mechanism that, when attaching a mounting member such as a power supply mounting member or a mounting tool to a long base member, determines the position at which the mounting member is fixed to the base member by sliding the mounting member in the longitudinal direction while supported in a groove formed along the longitudinal direction of the base member. Conventional fixing mechanisms fix the mounting member after sliding it along the groove of the base member, which makes installation difficult and time-consuming. The present disclosure provides a fastening mechanism that allows the mounting fixture to be easily secured to the base. [Means for solving the problem]

[0005] The fixing mechanism according to the present disclosure comprises: A base having an elongated arrangement portion; a mounting fixture having a generally rectangular fixing plate fixed to the placement portion; Equipped with the placement section has a groove section formed along the longitudinal direction so as to be open on the inside in the lateral direction, and a placement section formed on the opposite side of the groove section with respect to the open end of the groove section as a reference, and configured to place the mounting fixture by rotating the fixing plate around a rotation axis that intersects with the fixing plate, The dimension of the fixing plate in the short side direction is equal to or smaller than the dimension of the installation portion in the short side direction, the fixed plate has an outer end formed at an end in a longitudinal direction of the fixed plate, the outer end being fitted into the groove by rotating the fixed plate about a rotation axis intersecting the fixed plate; At least one half of the outer end portion has a distance from the rotation axis that is equal to or less than the sum of half the short-side dimension of the installation portion and the depth dimension of the groove portion. Effect of the Invention

[0006] In the present disclosure, the outer end can be rotated to fit into a groove, allowing the fitting to be secured to the base without having to slide along the base groove. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view of the lighting device 90 according to the first embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the lighting device 90 according to the first embodiment. [Diagram 3] FIG. 2 is a perspective view of a light source unit 80 according to the first embodiment. [Figure 4] FIG. 2 is a partially exploded perspective view of the light source unit 80 according to the first embodiment. [Diagram 5] FIG. 2 is a perspective view of the mounting fixture 30 according to the first embodiment. [Figure 6] FIG. 3 is an installation diagram of the mounting fixture 30 according to the first embodiment. [Figure 7] 1 is a cross-sectional view of a fixing mechanism 100 according to a first embodiment. [Figure 8] FIG. 2 is a plan view of the fixing mechanism 100 according to the first embodiment. [Figure 9] FIG. 4 is a diagram showing a method for fixing the mounting fixture 30 according to the first embodiment. [Figure 10]FIG. 4 is a diagram showing a modified example of the mounting fixture 30 of the first embodiment. [Figure 11] 6A to 6C are diagrams showing a mounting method of a modified example of the mounting fixture 30 of the first embodiment. [Figure 12] FIG. 4 is a diagram showing a modified example of the mounting fixture 30 of the first embodiment. [Figure 13] FIG. 4 is a diagram showing a modified example of the mounting fixture 30 of the first embodiment. [Figure 14] FIG. 4 is a diagram showing a mounting fixture 30 according to a second embodiment. [Figure 15] FIG. 11 is a cross-sectional view of a fixing mechanism 100 according to a second embodiment. [Figure 16] 13 is an explanatory diagram of a method for fixing a power supply unit 83 according to the second embodiment. FIG. [Figure 17] FIG. 11 is a diagram showing a modified example of the mounting fixture 30 of the second embodiment. [Figure 18] FIG. 11 is a plan view of the fixing mechanism 100 according to the third embodiment. [Figure 19] FIG. 13 is a plan view showing a modified example of the fixing mechanism 100 according to the third embodiment. [Figure 20] 13 is a plan view showing a modified example of the connecting portion 54 of the fixing mechanism 100. FIG. [Figure 21] 13 is a perspective view showing a modified example of the positioning portion 19 and the alignment portion 39. FIG. [Figure 22] FIG. 13 is a plan view showing a modified example of the fixed plate 38. [Diagram 23] 11 is a plan view showing a modified example of the groove portion 13 of the fixing mechanism 100. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals. In the description of the embodiments, the description of the same or corresponding parts will be omitted or simplified as appropriate.

[0009] Embodiment 1 ***Configuration Description*** ●Lighting device 90● (Fig. 1, Fig. 2) The lighting device 90 includes a fixture 70 and a light source unit 80 that is detachably attached to the fixture 70 . The lighting device 90 is used in a state where the light source unit 80 is attached to the fixture 70.

[0010] ●Apparatus 70● (Fig. 2, Fig. 3) The fixture 70 is fixed to a ceiling surface (mounting portion) by, for example, a hanging bolt (not shown) suspended from the ceiling. The fixture 70 has a pair of springs 71 for removably mounting the light source unit 80 . The fixture 70 is provided with a spring 71 which is a fixture-side connector, and the spring 71 engages with a spring receiver 50 which is a lamp-side connector provided on the light source unit 80. Alternatively, the spring 71 may be provided in the light source unit 80, and the spring receiver 50 may be provided in the device . The spring 71 engages with the spring receiver 50, whereby the light source unit 80 is attached to the fixture 70. When the spring 71 and the spring receiver 50 are disengaged from each other, the light source unit 80 is removed from the fixture 70 . The fixture 70 has a through hole, and an external electric wire is drawn from above the ceiling through the through hole (not shown) into the interior of the fixture 70 and connected to a relay unit (terminal block) 72 provided in the fixture 70. The relay section (terminal block) 72 and a power supply section 83 mounted on the light source unit 80 are electrically connected by an appliance power line 73 and a lamp power line 86, and power is supplied to the light source unit 80.

[0011] ●Light source unit 80● (Fig. 2, Fig. 3) The light source unit 80 includes a base 10 , a substrate 81 , a light source 82 , a power supply unit 83 , a cover 89 , and a pair of spring receivers 50 .

[0012] ●Fixing mechanism 100● (Figs. 2 and 3) The fixing mechanism 100 is a mechanism for fixing the mounting tool 30 to the base 10 . The fixing mechanism 100 includes a base 10 and a mounting fixture 30 . In the first embodiment, a specific example of the mounting fixture 30 is a spring receiver 50 .

[0013] ●Pedestal 10●(Fig. 3, Fig. 4, Fig. 6, Fig. 7) The base 10 is elongated and has a short side direction and a long side direction. The base 10 has an arrangement portion 11 having an elongated shape. In the base 10, a pair of spring receivers 50 with which the springs 71 are engaged are fixed to the grooves 13. In the base 10 , a power supply mounting fixture 60 for mounting the power supply unit 83 is fixed to the groove portion 13 . In the base 10 , a holder 88 for holding a power supply line 87 which is a path through which lighting power is supplied from the power supply unit 83 is fixed to the placement unit 11 . The base 10 has a generally rectangular arrangement portion 11 and an erect portion 14 erected from an end portion of the arrangement portion 11 in the short side direction. The cross-sectional shape of the base 10 is approximately U-shaped. A light source unit consisting of a substrate 81 and a light source 82 is disposed on one side of the base 10 . A cover 89 is attached to the upright portion 14 of the base 10 so as to cover the light source portion. A spring receiver 50 and a power supply unit 83 are disposed on the other side of the base 10 . The base 10 is formed using a material including a metal material, a resin material, a ceramic material, or the like. The base 10 may be formed by extrusion molding, or by other methods (such as press forming using sheet metal). The base 10 is also called a support member, a plate, or a frame.

[0014] ●Arrangement section 11● Arrangement section 11 has a rectangular shape (rectangular shape) and has a short side direction and a long side direction. The upper surface, which is the back surface of the placement section 11, is a fixture placement surface 12 on which the fixture 30 is placed. The spring receiver 50 and the power supply unit 83 are disposed on the mounting device mounting surface 12 of the mounting section 11 . The lower surface, which is the front surface of the arrangement portion 11, is the surface opposite to the fixture arrangement surface 12, and is a light source arrangement surface 17 on which a board 81 on which a light emitting element, which is a light source 82, is mounted is arranged. The placement portion 11 has a pair of standing portions 14 and a pair of protruding portions 15 along the longitudinal direction. The placement section 11 has a groove section 13 formed so that the depth direction faces outward in the short side direction, and an installation section 18 formed on the opposite side of the groove section 13 with respect to the open end of the groove section 13 as a reference, and in which the mounting fixture 30 is installed.

[0015] ●Upright section 14● The standing portion 14 is a side wall portion that rises from the long side of the placement portion 11. The standing portions 14 are erected on both ends of the arrangement portion 11 in the short direction from the fixture arrangement surface 12 toward the opposite side to the light source arrangement surface 17 . When the base 10 is formed by extrusion molding, the standing portion 14 is formed continuously along the longitudinal direction of the base 10.

[0016] ●Protrusion part 15● The protruding portion 15 is a flat plate that protrudes from the middle of the standing portion 14 toward the center of the arrangement portion 11 in the short side direction. The protruding portions 15 protrude from the pair of standing portions 14 in directions approaching each other and parallel to the mounting tool placement surface 12 of the placement portion 11. When the base 10 is formed by extrusion molding, the protruding portion 15 is formed continuously along the longitudinal direction of the base 10 .

[0017] ●Groove 13● The groove portion 13 has a groove 16 . The groove portion 13 is formed continuously in the longitudinal direction of the base 10 between the mounting tool placement surface 12 of the placement portion 11 and the protruding portion 15 . The groove portion 13 is a recess formed by the upper surface of the mounting tool placement surface 12 , the inner surface of the standing portion 14 , and the lower surface of the protruding portion 15 . The groove 13 has a closed end on the outside and an open end on the inside. The bottom surface, which is the closed end of the groove portion 13, intersects with the mounting device placement surface 12 at a right angle. The bottom surface of the groove portion 13 is formed by the inner surface of the standing portion 14 . The groove portion 13 is formed so that its depth direction is parallel to the mounting device placement surface 12 . The depth dimension of the groove portion 13 is the same as the length dimension of the protruding portion 15 in the short side direction. The pair of grooves 13 have a pair of open ends facing each other.

[0018] ●Installation part 18● The installation section 18 is the portion of the arrangement section 11 where the mounting fixture 30 is arranged. The installation portion 18 is the portion between the pair of protruding portions 15 . The installation portion 18 is a portion on the opposite side of the groove portions 13 with respect to the open ends of the pair of groove portions 13 . The installation portion 18 is the portion between the open ends of the pair of groove portions 13 . The installation section 18 is a section located in the opposite direction to the depth direction. The installation portion 18 has a center C1 in the center between the pair of overhanging portions 15, which overlaps with the center of rotation C that is the axis of rotation of the fixed plate 38 of the mounting fixture 30. The center of the installation portion 18 in the short side direction is the center C1. The installation portion 18 has a positioning portion 19 .

[0019] ● Positioning part 19 ● The positioning portion 19 is a portion where the alignment portion 39 of the mounting tool 30 is disposed. The positioning portion 19 is a mark (such as a laser marking or a color marking) provided on the base 10. The positioning feature 19 may be a raised portion, embossment or protrusion that fits lightly into the alignment feature 39 .

[0020] ●Mounting bracket 30●(Fig. 5) The mounting fixture 30 is fixed to the placement portion 11 of the base 10 . The mounting fixture 30 has a mounting portion 37, a fixing plate 38, and a connecting portion 54. The mounting fixture 30 has a fixing plate 38 that is substantially rectangular in plan view.

[0021] ●Mounting part 37● The mounting portion 37 is a portion for mounting a spring 71 (member). When the mounting fixture 30 is a spring receiver 50 , the mounting portion 37 has a spring receiver frame 51 and a spring receiver hole 52 .

[0022] ●Connection part 54● The connecting portion 54 is a portion where the fixed plate 38 and the mounting portion 37 are connected. The mounting portion 37 is connected to the fixed plate 38 by a connecting portion 54 . The connecting portion 54 has a height from the upper surface of the fixed plate 38 that is equal to or greater than the thickness of the protruding portion 15 .

[0023] ●Fixed plate 38● The fixed plate 38 has a pair of long sides and a pair of short sides. The mounting portion 37 is connected to one of the long sides of the fixed plate 38 . The fixed plate 38 is connected to the mounting portion 37 via a connecting portion 54 on one of the long sides. The fixed plate 38 has a substantially rectangular shape. The fixed plate 38 is located at the end in the long side direction and has an outer end 33 which fits into the groove 13 . In plan view, the fixed plate 38 has a circumscribing rectangle 40 having a short side 41 and a long side 42 . The dimension of the short side 41 of the circumscribing rectangle 40 is taken as the length dimension L2. The dimension of the long side 42 of the circumscribing rectangle 40 is taken as the length dimension L1. The fixed plate 38 has a rotation center C in a plan view. The center of rotation C is the intersection of the diagonals of the circumscribing rectangle 40 . The fixing plate 38 has a pair of fixing portions 31 and a pair of alignment portions 39 . The fixed plate 38 has a shape that is point-symmetric with respect to the center of rotation C.

[0024] ●Fixed part 31● The fixing portions 31 are located on both ends of the fixing plate 38 and are the portions that are sandwiched between the groove portions 13 . The fixing portion 31 is fixed to the groove portion 13 . Between the pair of fixing portions 31, there is an attachment portion 37. The fixing portion 31 has a fixing hole 32 .

[0025] ●Fixing hole 32● The fixing holes 32 are a pair of holes arranged at the ends of the fixing plate 38 in the long side direction. The fixing hole 32 is a through hole provided in the center of the fixing portion 31 . The fixing holes 32 may be recesses. The fixing hole 32 may be a notch whose end in the long side direction is open. The fixing hole 32 is formed at a position where the hole is half hidden by the inner end of the groove portion 13 . The fixing holes 32 fix the mounting fixture 30 to the base 10 .

[0026] ●Outer end 33● The outer end 33 is an end side located on the outer side of the fixed portion 31 . The outer end 33 generally defines a circular arc 34 . The arc 34 is formed over the entire outer end 33 of the fixing portion 31 . The arc 34 is an arc of radius R1 from the center of rotation C.

[0027] ●Alignment section 39● The alignment portion 39 is a pair of through holes or a plurality of through holes in the central portion of the fixed plate 38 . The alignment portions 39 are alignment holes on both sides of the center of rotation C.

[0028] ●Circumscribed circle 43 and circumscribed circle 44● The circumscribing circle 43 is an imaginary circle having a radius R1 from the center of rotation C. The circumscribing circle 43 is the circumscribing circle of the fixed plate 38 . The circumscribing circle 44 is an imaginary circle having a radius R2 from the center of rotation C. The circumscribing circle 44 is the circumscribing circle of a connecting portion 54 where the fixed plate 38 and the mounting portion 37 are connected.

[0029] ●Dimensions of each part and their relationship●(Fig. 8) L1: Length dimension of the long side 42 of the circumscribing rectangle 40 of the fixed plate 38 L2: Length dimension of the short side 41 of the circumscribing rectangle 40 of the fixed plate 38 L3: The distance in the short-side direction between a pair of erected portions 14 = the length dimension in the short-side direction of the arrangement portion 11 (the mounting device arrangement surface 12) (L3≧L1) L4: Short-side distance between a pair of grooves 13 = Short-side length of the installation portion 18 (L4 <L1)(L4≧L2) D: Short-side length dimension (depth dimension) of groove portion 13 = length of overhang of overhang portion 15 from upright portion 14 R1: Radius of the arc 34 of the outer end 33 R2: Radius of circumscribing circle 44 of connecting portion 54 R3: Radius of the inscribed circle 45 of the pair of upright portions 14 (the bottom surfaces of the pair of groove portions 13) (R3=L3÷2=R4+D≧R1) R4: Radius of the inscribed circle 46 of the pair of groove portions 13 (end edges of the protruding ends of the pair of protruding portions 15) (R4=L4÷2≧R2) (R3 ≧ R1 > R4 ≧ R2)

[0030] The pair of opposing grooves 13 are spaced apart in the short-side direction by a length dimension L4. The upright portions 14 on the bottom surface of the groove portion 13 are spaced apart in the short direction by a length dimension L3. The pair of fixing portions 31 have ends of a circular arc 34 that is greater than the diameter L4 and is equal to or smaller than the diameter L3. The distance L4 between the pair of projections 15 is larger than the dimension L2 in the short side direction of the fixed plate 38 (L4>L2). The maximum dimension of the dimension L2 in the short side direction of the fixed plate 38 is the length dimension L4. Therefore, the width dimension L2 in the short side direction of the fixed plate 38 is equal to or smaller than the length dimension L4 in the short side direction of the installation portion 18 (L4≧L2). The distance L4 between the pair of protruding portions 15 is smaller than the dimension L1 in the long side direction of the fixed plate 38 (L4 <L1)。 The groove 13 has a depth dimension of dimension D. A depth dimension D of the groove portion 13 in the short-side direction of the arrangement portion 11 is the same as the projection dimension of the projection portion 15 from the standing portion 14 in the short-side direction. The height dimension of groove portion 13 (the distance dimension from fixture placement surface 12 of placement portion 11 to the underside of protrusion portion 15) is greater than or equal to the thickness dimension of fixed plate . The distance L3 between the pair of standing portions 14 in the groove 13 is larger than the dimension L1 in the long side direction of the fixing plate 38 (L3>L1), or L3=L1 when fixing is performed with no gap between the bottom surface of the groove 13 and the outer end portion 33 of the fixing plate 38 in the short side direction. Therefore, the dimension L1 in the long side direction of the fixing plate 38 is equal to or smaller than the length dimension L3 in the short side direction of the standing portions 14 (L3≧L1).

[0031] The mounting fixture 30 has a center of rotation C which is an axis of rotation about which the fixture 30 rotates. The fixture 30 is rotated by aligning the center of rotation C of the fixture 30 with the center C1 of the installation portion 18, and the fixture 30 is fixed to the base 10 by aligning the center of rotation C of the fixture 30 with the center C1 of the installation portion 18. The width L2 of the fixing portion 31 in the short side direction of the circumscribing rectangle 40 of the fixing plate 38 is equal to or smaller than the distance L4 (the short side length of the installation portion 18) between the pair of groove portions 13 (L2≦L4). The outer end 33 of the fixing portion 31 at the end of the long side 42 of the circumscribing rectangle 40 has a circular arc 34 with a radius R1 that is greater than half the length dimension L4 (R4=L4÷2).

[0032] The radius R1 of the arc 34 of the outer end 33 of the fixing portion 31 is equal to or less than the total length dimension R3 of half the length dimension L4 and the depth dimension D (R1≦R3=L4÷2+D). The outer end 33 of the fixed plate 38 has a short side that forms an arc shape along a circumscribing circle 43 of radius R1 centered on the rotation center C of the circumscribing rectangle 40.

[0033] An imaginary circle inscribed in the distance L3 between the pair of standing portions 14 is defined as an inscribed circle 45 having a radius R3 and a center C1. An imaginary circle inscribed in the distance L4 between the pair of projections 15 is defined as an inscribed circle 46 having a radius R4 and centered at the center C1. The radius R1 of the arc 34 of the outer end 33 of the fixed plate 38 is equal to or smaller than the radius R3 of the inscribed circle 45 (R1≦R3). The distance between the centers of the pair of fixing holes 32 is the same as the distance L4 in the short-side direction between the pair of groove portions 13 (the length dimension in the short-side direction of the installation portion 18). The fixing hole 32 is formed across the circumference of the inscribed circle 46 . The radius R2 of the circumscribing circle 44 of the connecting portion 54 is equal to or smaller than the radius R4 of the inscribing circle 46 (R2≦R4). That is, the mounting portion 37 is fixed to the fixed plate 38 by the connecting portion 54 located in the inner region of the inscribed circle 46 of radius R4 centered on the center C1 (the inscribed circle 46 whose radius is half the length dimension L4). Therefore, even if the mounting fixture 30 rotates at the installation portion 18, the connecting portion 54 will not hit the protruding portion 15. If the radius R2 of the circumscribing circle 44 of the connecting portion 54 is equal to or smaller than the radius R4 of the inscribing circle 46, the rotation of the mounting fixture 30 is not hindered by the overhanging portion 15. Therefore, as long as the height of the connecting portion 54 is greater than or equal to the thickness of the protrusion 15 from the upper surface of the fixed plate 38, a part of the mounting portion 37 (the part above the connecting portion 54) may be outside the circumscribing circle 44 of the connecting portion 54 in a planar view. The outer end 33 of the fixing portion 31 of the fixing plate 38 is located in a region from the center C1 in the short direction of the installation portion 18 with a radius ranging from half R4 of the short direction length dimension L4 of the installation portion 18 to half R3 of the short direction length dimension L3 of the placement portion 11.

[0034] ●How to fix the mounting fixture 30● (Fig. 9) A method of fixing a fixture 30 having a pair of fixing portions 31 to a base 10 in which a pair of opposing grooves 13 are formed will be described with reference to FIG.

[0035] ● Placement Step S10 ● The mounting fixture 30 is disposed between the pair of opposing grooves 13 such that the arrangement direction of the pair of fixing parts 31 is parallel to the direction in which the pair of opposing grooves 13 are formed. In other words, the mounting fixture 30 is disposed on the installation part 18 such that the long side of the fixing plate 38 is parallel to the depth direction of the grooves 13. The bottom surface of the fixed plate 38 is placed on the mounting tool arrangement surface 12 so that the rotation center C of the fixed plate 38 is located in the center (center C1) of the spacing dimension L4 between the pair of overhanging portions 15 (width dimension L4 of the installation portion 18).

[0036] ●Rotation step S20● After the mounting fixture 30 is placed, the mounting fixture 30 is rotated in a direction in which the arrangement direction of the pair of fixing parts 31 intersects with the depth direction of the pair of opposing groove parts 13 while aligning the rotation center C of the fixing plate 38 with the center C1 of the installation part 18. Then, the pair of fixing parts 31 are placed between the pair of opposing groove parts 13. By rotating the fixing plate 38 90 degrees inside an imaginary circle of diameter L3 while keeping the bottom surface of the fixing plate 38 in contact with the mounting fixture arrangement surface 12, the fixing portion 31 is inserted into the groove portion 13 and the fixing portions 31 at both ends of the fixing plate 38 overlap with the protrusion portions 15. When aligning (positioning) the mounting fixture 30 , the positioning portion 19 of the base 10 is peered through the hole of the alignment portion 39 and rotated 90 degrees to align the positioning portion 19 with the alignment portion 39 . The following two points are subject to positioning. (1) The position of the mounting fixture 30 in the longitudinal direction of the base 10. (2) The rotation angle of the mounting fixture 30.

[0037] ●Fixed step S30● After the mounting fixture 30 is rotated and positioned, the pair of fixing portions 31 are fixed between the pair of opposing groove portions 13 . The portion of the overhanging portion 15 that overlaps with the fixing hole 32 is pressed into the fixing hole 32 to deform the overhanging portion 15. The (downward) protrusion 151 formed by the deformation of the overhanging portion 15 enters the fixing hole 32, and the mounting tool 30 is fixed to the base 10. After being fixed, the mounting fixture 30 is restricted from rotating and sliding relative to the base 10.

[0038] Summary of the first embodiment The lighting device 90 includes an appliance 70 fixed by a fixture 30 of a fixing mechanism 100, and a light source unit 80 in which the fixture 30 of the fixing mechanism 100 is fixed to a base 10.

[0039] The fixing mechanism 100 includes a base 10 and a mounting fixture 30 . The base 10 has a pair of opposing grooves 13 . The mounting fixture 30 has a pair of fixing portions 31 that are fixed to a pair of opposing groove portions 13, and a mounting portion 37 that is located between the pair of fixing portions 31 and that mounts the device 70. The pair of opposing grooves 13 are formed so as to be spaced apart by a length dimension L4. In plan view, the mounting fixture 30 has a circumscribing rectangle 40 having a short side 41 and a long side 42 . Each of the pair of fixing portions 31 has a width dimension in the short side direction of the mounting fixture 30 that is equal to or smaller than the length dimension L4. Each of the pair of fixing portions 31 has, at its outer end 33, a circular arc 34 whose center is the rotation center C of the circumscribing rectangle 40 and whose radius is greater than half the length dimension L4.

[0040] The pair of opposing grooves 13 are formed with a depth dimension D. The radius of the arc 34 is equal to or less than the total length dimension of half the length dimension L4 and the depth dimension D.

[0041] The arc 34 is formed over the entire outer end portion 33 of each of the pair of fixing portions 31 . The outer end 33 is formed solely by a circular arc 34 .

[0042] The mounting portion 37 is fixed to the fixed plate 38 by a connecting portion 54 located in the inner area of ​​a circumscribing circle 44 whose radius (radius R4) is less than half the length dimension L4 and whose center is the rotation center C of the circumscribing rectangle 40.

[0043] The mounting fixture 30 has a mounting portion 37 which is a spring receiver 50 for mounting a spring 71 thereto.

[0044] ***Explanation of the Effects of the First Embodiment*** According to the fixing mechanism 100 of the first embodiment, the mounting tool 30 can be fixed to the base 10 without sliding it along the groove 13 of the base 10. According to the fixing mechanism 100 of the first embodiment, the mounting fixture 30 can be positioned simply by rotating the mounting fixture 30, thereby improving workability. According to the fixing mechanism 100 of the first embodiment, the groove portion 13 is required only in the installation portion 18 where the mounting tool 30 is installed, and the groove portion 13 does not need to be provided over the entire length of the base 10 .

[0045] ***Description of other modified examples of the embodiment*** Modification of the mounting fixture 30 (FIG. 10) The mounting fixture 30 in FIG. 10 has a different shape of the outer end portion 33 compared to the mounting fixture 30 in FIG. In Figure 10, when the mounting fixture 30 is fixed, at least a portion of the outer end 33 of the fixing plate 38 is located in an area outside the radius R3 from the center C1 in the short direction of the installation portion 18, which is half the length dimension of the short direction of the placement portion 11. The outer end 33 of the fixture 30 in FIG. 10 is not entirely a circular arc, but only half of it is a circular arc, and the remaining half is a straight line that forms the short side 41 of the circumscribing rectangle 40. When mounting fixture 30 in FIG. 10 is mounted by rotating it 90 degrees clockwise, the half of outer end 33 that is in the front in the direction of rotation is called one half 35, and the half of outer end 33 that is in the rear in the direction of rotation is called the other half 36. An arc 34 is formed on one half 35 of the outer end 33 of the fixing portion 31 . The other half 36 of the outer end 33 of the fixed portion 31 has an enlarged portion 331 which is larger than the radius of the arc 34 . The enlarged portion 331 exists in a region outside the inscribed circle 45 of radius R3 (diameter L3). The pair of enlarged portions 331 are formed in the diagonal direction of the fixed plate 38 . A dimension L5 of a straight line that passes through the center of rotation C and crosses the pair of enlarged portions 331 is greater than the diameter of the circular arc 34 (L5>R1+R1). The dimension of a straight line passing through the center of rotation C and crossing the corners of the pair of enlarged portions 331 is larger than the distance L3 between the pair of standing portions 14. The other half 36 of the outer end 33 is half of the shorter side 41 of the circumscribing rectangle 40 . At least a portion of the enlarged portion 331 in the other half 36 of the outer end portion 33 is greater than the sum of half the length dimension L4 (radius R4 of the inscribed circle 46) from the center of rotation C of the circumscribed rectangle 40 and the depth dimension D (radius R3 of the inscribed circle 45 = half the length dimension L4). The distance between at least a portion of each point of the straight line of the other half 36 and the center of rotation C is greater than the sum of half the length dimension L4 from the center of rotation C of the circumscribed rectangle 40 and the depth dimension D (the radius R3 of the inscribed circle 45 = half the length dimension L4). One half 35 of the outer end portion 33 exists only in an area whose distance from the center C1 in the short direction of the installation portion 18 is less than the sum of the length dimension (radius R3) of half the length dimension L4 in the short direction of the installation portion 18 and the groove depth dimension D of the groove portion 13. At least one half 35 of the outer end 33 is not located in an area whose radius from the center C1 in the short direction of the installation portion 18 is greater than the sum of the long dimension (radius R3) of half the short direction length dimension R4 of the installation portion 18 and the depth dimension D of the groove portion 13.

[0046] One half 35 of the outer end portion 33 has a portion of its short side formed into an arc shape along a circumscribing circle 43 of radius R1 which is less than an inscribing circle 45 of radius R3 (diameter L3), and the other half 36 exists in the area outside the circumscribing circle 43. The enlarged portion 331 located at the rear in the rotational direction of the other half 36 is shaped to extend to the area outside the inscribed circle 45 of radius R3 (diameter L3).

[0047] ●● Fixing method ●● (Fig. 11) By rotating the mounting fixture 30 by 90 degrees within the inscribed circle 45 of radius R3 (diameter L3), the fixing portion 31 of the fixing plate 38 inserted into the groove 13 overlaps with the protruding portion 15. Rotation of more than 90 degrees is restricted by an enlarged portion 331 on the outer side of an inscribed circle 45 of radius R3 (diameter L3) in the fixed plate 38, and the position in the rotation direction (rotation angle) is determined. Since the mounting fixture 30 is restricted from rotating more than 90 degrees, the position in the rotation direction (rotation angle) is accurately determined. Since the mounting fixture 30 does not require adjustment of the position in the rotation direction (rotation angle), the ease of assembly (workability, work time) and assembly quality (quality stability) are improved.

[0048] Modification of the mounting fixture 30 (FIG. 12) The fixture 30 in FIG. 12 differs from the fixture 30 in FIG. 5 in the shapes of the mounting portion 37 and the fixing plate 38. The mounting portion 37 of the mounting fixture 30 in FIG. 12 has a spring receiving frame 51, a spring receiving hole 52, and a pair of connection portions 53. The fixed plate 38 in FIG. 12 does not have a center, and the fixed plate 38 is separated. The pair of connection portions 53 are located on both sides of the spring receiving frame 51 . The connection portion 53 has a trapezoidal shape. The bottom side of the connection portion 53 is connected to the fixed plate 38 by a connecting portion 54 . The pair of connecting portions 54 are disposed in parallel. The pair of connecting portions 54 are located inside a circumscribing circle 44 of radius R2 centered on the center of rotation C. The radius R2 of the circumscribing circle 44 of the connecting portion 54 is equal to or smaller than the radius R4 of the inscribing circle 46 of the pair of overhanging portions 15.

[0049] Modification of the mounting fixture 30 (FIG. 13) The fixture 30 in FIG. 13 differs from the fixture 30 in FIG. 5 in the shapes of the mounting portion 37 and the fixing plate 38. The mounting portion 37 of the mounting fixture 30 in FIG. The fixed plate 38 in FIG. 13 does not have a center, and the fixed plate 38 is separated. The pair of connection portions 53 are located on either side of the spring receiving portion 58 . The connection portion 53 has a rectangular shape. The bottom side of the connection portion 53 is connected to the fixed plate 38 by a connecting portion 54 . The pair of connecting portions 54 are disposed in parallel. The pair of connecting portions 54 are located inside a circumscribing circle 44 of radius R2 centered on the center of rotation C. The radius R2 of the circumscribing circle 44 of the connecting portion 54 is equal to or smaller than the radius R4 of the inscribing circle 46 of the pair of overhanging portions 15.

[0050] ●Rotation direction of mounting bracket 30● The rotation direction of the mounting fixture 30 may be either clockwise or counterclockwise. Standardizing the rotation direction of the fixture 30 contributes to the consistency of the work and the maintenance and stability of assembly quality.

[0051] ●Fixing hole 32 and protrusion 151● The shape of the fixing hole 32 may be any shape as long as it can be fitted into the downward protrusion 151 formed by deformation of the overhanging portion 15 . The fixing holes 32 may be round, triangular, square, or other shapes. The shape of the protrusion 151 is arbitrary as long as it can be fitted into the fixing hole 32 . The protrusion 151 may be formed in advance on the extension portion 15 as long as it does not interfere with the rotation of the fixing plate 38, or the attachment of the mounting fixture 30 may be completed by a so-called "fixed fit" method using the protrusion 151 and the fixing hole 32.

[0052] Embodiment 2 In the second embodiment, differences from the first embodiment will be described. In the second embodiment, a specific example of the fixture 30 is a power supply fixture 60 . In the second embodiment, a case in which the fixture 30 is a power supply fixture 60 will be described.

[0053] ●Power supply mounting bracket 60● (Fig. 14, Fig. 15) The power supply mounting fixture 60 is a mounting member for mounting the power supply unit 83 to the base 10 . The power supply attachment fixture 60 has a fixing plate 68 , a side wall portion 62 , and a mounting portion 61 .

[0054] ●Fixed plate 68● The fixed plate 68 has a pair of punched portions 64 along the long side direction. The punched portion 64 is an opening formed by punching the fixed plate 68 in a Y-shape to create two U-shaped tongue-like portions, and then bending and raising the two tongue-like portions. Instead of the Y-shape, two U-shaped punchings may be formed consecutively or adjacently with a space between them. The bent and raised root portion of the punched portion 64 of the fixing plate 68 becomes the connecting portion 54 . The cut-out portion 64 of the fixed plate 68 serves as a holding portion 67 for holding the power supply unit 83 . The holding portion 67 has a side wall portion 62 and a placement portion 61 . The side wall portion 62 and the placement portion 61 are disposed adjacent to each other. The pair of side walls 62 and the pair of mounting portions 61 are disposed in the diagonal directions of the fixed plate 38, respectively.

[0055] ●Side wall section 62● The side wall portion 62 is a U-shaped flat plate formed by punching the fixed plate 38 into a U shape and standing it upright. The side wall portion 62 has a claw-shaped locking portion 63 in the center.

[0056] ●Placement section 61● The placement portion 61 is a stepped portion. The mounting portion 61 is formed by punching out the fixed plate 38 into a U-shape, and standing the entire base of the U-shaped or tongue-shaped tongue upright to form an upright portion 65, and bending the entire middle part of the tongue to form a base portion 66. The upright portion 65 is formed by the entire base portion of a U-shaped tongue formed by punching the fixing plate 38 into a U-shape. The upright portion 65 is cut and raised 90 degrees from the fixed plate 38 . The base 66 is formed by the entire head portion of the tongue. The base portion 66 is bent 90 degrees from the upright portion 65 into an L-shape, and is a flat portion parallel to the fixed plate 38 . The length dimension in the short side direction of the upright portion 65 and the base portion 66 is the same as the length dimension in the short side direction of the tongue-shaped portion punched out into a U shape.

[0057] ●Power supply unit 83● (Fig. 16) The power supply unit 83 (control unit) is attached to the base 10 by having one end held by a holder 88 attached to the base 10 and the other end held by the power supply attachment fixture 60 . The power supply unit 83 has a case 84 having a bottom plate and a side plate. The case 84 has a control circuit board, a cover (upper case), and a chassis (bottom case). The side plate of the case 84 has a case hole 85 .

[0058] The power supply mounting fixture 60 is secured to the base 10 in the same manner as the spring receiver 50 . After the power supply attachment fixture 60 is fixed to the base 10 , the power supply unit 83 is fixed to the power supply attachment fixture 60 . The power supply unit 83 is moved from top to bottom, and the bottom plate of the case 84 is placed on the platform 66 of the placement unit 61. The locking portions 63 fit into the case holes 85, and the power supply unit 83 is fixed to the power supply fixture 60.

[0059] Summary of the second embodiment The mounting fixture 30 of the fixing mechanism 100 of the second embodiment includes a fixing plate 38 and a pair of holding portions 67 . The holding portion 67 is formed by cutting out a part of the fixed plate 38 and raising it. The holding portion 67 has a mounting portion 61 on which a case 84 (chassis or bottom case) of the power supply portion 83 is mounted. The holding portion 67 has a side wall portion 62 that holds down a side plate of a case 84 (chassis or bottom case) of the power supply portion 83 . The holding portion 67 has a locking portion 63 that locks a case 84 (chassis or bottom case) of the power supply portion 83 . The side wall portion 62 is formed by bending (curving) a part of the fixed plate 38 . The locking portion 63 is a locking claw formed by cutting and raising a part of the side wall portion 62 of the holding portion 67 in a V shape. The locking portion 63 is inserted into a case hole 85 (locking hole) formed in a case 84 (chassis or bottom case) of the power supply unit 83, and the tip of the locking portion 63 locks the case 84 (chassis or bottom case). The object of engagement of the engagement portion 63 may be the cover (upper case) of the power supply unit 83 or the control circuit board of the power supply unit 83.

[0060] ***Explanation of the effect of the second embodiment*** According to the second embodiment, since the placement portion 61 is formed by bending (curving) a part of the holding portion 67, the following effects are achieved. (1) Since there is no frame around the mounting portion 61, the mounting portion 61 can be made large, and therefore the power supply unit 83 can be stably held. (2) Since the mounting portion 61 can be made larger, the heat of the power supply unit 83 can be efficiently transferred to the base 10 via the power supply attachment fixture 60 . (3) Since there is no frame around the mounting portion 61, the cut-out holding portion 67 can be made smaller, and the area of ​​the punched-out portion 64 is reduced, thereby improving the rigidity (strength) of the power supply mounting fixture 60. (4) The power supply attachment fixture 60 can be made smaller, which contributes to reducing the material used for the power supply attachment fixture 60 and the weight of the lighting fixture (light source unit 80).

[0061] Modification of the mounting fixture 30 (FIG. 17) A power supply attachment fixture 60 in FIG. 17 is an attachment fixture in which the arrangement of the holding portion 67 in FIG. 14 is changed. The power supply attachment tool 60 in FIG. 17 differs from that in FIG. 14 in that the positions of the placement portion 61 and the side wall portion 62 of one of the holding portions 67 in the short side direction are reversed. The power supply attachment tool 60 in FIG. 17 is formed so that a pair of mounting portions 61 and a pair of side wall portions 62 face each other, and can hold the power supply portion 83 more stably.

[0062] Embodiment 3 In the third embodiment, differences from the first and second embodiments will be described. In the third embodiment, a case will be described in which the fixing plate 38 of the mounting fixture 30 does not have a point-symmetric shape with respect to the center of rotation C.

[0063] ●Groove 13● (Fig. 18) The pair of grooves 13 of the base 10 have different depth dimensions. The length dimension of the protruding portion 15 forming one of the groove portions 13 is D1. The length dimension of the protruding portion 15 forming the other groove portion 13 is D2. The depth dimension D1 of one groove portion 13 is greater than the depth dimension D2 of the other groove portion 13.

[0064] ●Mounting part 37● In FIG. 18, the connecting portion 54 of the attachment portion 37 is a square portion where the fixed plate 38 overlaps before and after rotation, and the length of one side is L1. The center C2 of the square where the fixed plate 38 overlaps before and after rotation is the intersection point of the diagonals of the square. The circumscribing circle 44 of the connecting portion 54 is a circle with a radius R2 centered on the center C2 of the square. The center C1 of the square is located at the center C1 of the width dimension L3 of the installation portion 18. The distance between the center C1 of the square and the protruding portion 15 is equal to the radius R2.

[0065] ●Fixed plate 38● The center of rotation of the fixed plate 38 is not the intersection of the diagonals of the circumscribing rectangle 40 of the fixed plate 38, but the center C2 of the circumscribing circle 44 of the connecting portion 54 of the attachment portion 37. The radius of the arc 34 of the outer end 33 of one of the fixed parts 31 is radius R5 centered on the center C2. That is, the circumscribing circle 431 of the outer end 33 of the one of the fixed parts 31 is a circle with radius R5 centered on the center C2. The radius of the arc 34 of the outer end 33 of the other fixed part 31 is radius R6 centered on the center C2. That is, the circumscribing circle 432 of the outer end 33 of the other fixed part 31 is a circle with radius R6 centered on the center C2. Since the depth dimension D1 of one groove portion 13 is greater than the depth dimension D2 of the other groove portion 13, the radius R5 is greater than the radius R6 (R5>R6). If the radius of the arc 34 of the outer end 33 of one of the fixing parts 31 is equal to or smaller than radius R5, the fixing plate 38 can rotate 90 degrees. The radius of the arc 34 of the outer end 33 of one of the fixing parts 31 may be radius R6. If the radius of the arc 34 of the outer end 33 of the other fixed portion 31 is equal to or smaller than the radius R6, the fixed plate 38 can rotate 90 degrees. Since the depth dimensions of the grooves 13 are different, the length dimension in the long side direction of one fixing portion 31 is greater than the length dimension in the long side direction of the other fixing portion 31. Even if the length dimensions in the long side direction of the two fixing portions 31 are different, both fixing holes 32 are formed at positions of radius R2 centered on center C2.

[0066] Summary of the third embodiment The pair of grooves 13 have a depth dimension D1 and a depth dimension D2 that are different in size. The radius of the arc 34 of the outer end 33 of one fixing portion 31 fixed to the groove 13 having the depth D1 is equal to or less than the total length R5 of half the length L4 and the depth D1. The radius of the arc 34 of the outer end 33 of the other fixing portion 31 fixed to the groove 13 having the depth D2 is equal to or less than the total length R6 of half the length L4 and the depth D2.

[0067] ***Explanation of the Effects of the Third Embodiment*** According to the third embodiment, even if the pair of grooves 13 have different depth dimensions, the fixture 30 can be fixed to the base 10.

[0068] Modification of the mounting fixture 30 (FIG. 19) The fixture 30 in FIG. 19 is obtained by removing one of the fixing portions 31 from the fixing plate 38 of the fixture 30 in FIG. The fixing plate 38 is fixed to the groove portion 13 by only one fixing portion 31 . There are two fixing holes 32 in the short side direction. Since there are two fixing holes 32, even if one fixing portion 31 is fixed to only one of the groove portions 13, the fixture 30 will not rotate after being fixed. In FIG. 19, a pair of grooves 13 may be present as in the first and second embodiments, or as in FIG.

[0069] ●Modification of the connecting portion 54 of the fixing mechanism 100 (FIG. 20)● As shown in FIG. 20, a part of the connecting portion 54 may be in a protruding portion 55 that protrudes from an inscribed circle 46 of radius R4 that is inscribed in the interval dimension L4 between a pair of overhanging portions 15. The protruding portion 55 is a substantially triangular portion protruding from the inscribed circle 46 . The two sides of the protruding portion 55 are a tangent to the inscribed circle 46 that is parallel to the short side 41 of the circumscribed rectangle 40 and a tangent to the inscribed circle 46 that is parallel to the short side 41 of the circumscribed rectangle 40 . The base of the protruding portion 55 is an arc of the inscribed circle 46 . The protruding portion 55 does not collide with the overhanging portion 15 even when the mounting fixture 30 is rotated 90 degrees clockwise. Therefore, even if the connecting portion 54 is present in the protruding portion 55, the mounting fixture 30 is not prevented from rotating 90 degrees clockwise. According to the mounting fixture 30 of FIG. 20, the connecting portion 54 can be enlarged up to the protruding portion 55, so that the connection between the mounting portion 37 and the fixed plate 38 becomes strong.

[0070] ●Modification of the positioning portion 19 and the alignment portion 39 of the fixing mechanism 100 (FIG. 21)● As shown in FIG. 21, a through-hole alignment portion 39 may be provided at the rotation center C of the fixed plate 38, and a positioning portion 191 that passes through the alignment portion 39 may be provided on the base 10. The positioning portion 191 is a cylindrical or conical protrusion formed at the center C1 of the installation portion 18 of the base 10. By fitting the positioning portion 39 into the positioning portion 191, the position of the fixing plate 38 in the longitudinal direction of the base 10 is accurately determined. Furthermore, since the fixed plate 38 rotates around the positioning portion 191, there is no deviation in the center of rotation of the fixed plate 38 during rotation. The positioning portion 191 may be a screw that penetrates the center of the installation portion 18 of the base 10 from bottom to top. When the positioning portion 191 is a screw, after the fixing plate 38 is fixed to the groove portion 13 , a nut can be fitted onto the screw to fix the center of the fixing plate 38 to the installation portion 18 .

[0071] As shown in FIG. 21, a pair of positioning portions 192 for positioning the fixing holes 32 on the protruding portion 15 may be displayed. The positioning portion 192 is provided in correspondence with the position where the fixing hole 32 of the fixing plate 38 is fixed. The positioning portions 192 are a pair of marks (laser markings, color markings, etc.) provided on the upper surface of the protruding portion 15 of the base 10. Specific examples of the positioning portion 192 are a triangle mark, a diamond mark, or an arrow. The position of the fixing plate 38 is determined by rotating the fixing plate 38 until the fixing holes 32 coincide with the positioning portions 192 , so that the fixing holes 32 function as the alignment portions 39 . The positioning portion 192 may be a protrusion that is shallowly fitted into the fixing hole 32 . The positioning portion 192 also functions as a press mark that indicates the position where the protruding portion 15 is pressed. The positioning portion 192 also functions as a check mark to check whether the press is performed in the correct position.

[0072] As shown in FIG. 21, the installation section 18 may be provided with a pair of positioning sections 193 for indicating the rotational position. The positioning portion 193 is provided along the arc 34 of the outer end portion 33 of the fixed plate 38 . The positioning portion 193 is an arc having the same radius R1 as the radius R1 of the arc 34 of the outer end portion 33 of the fixed plate 38 . The tip of the positioning portion 193 is marked with an arrow indicating the direction of rotation. The positioning portion 193 is a mark (such as a laser marking or a color marking) provided on the base 10. When the outer end 33 of the fixed plate 38 is aligned with the positioning portion 193 as the alignment portion 39, the rotational position of the fixed plate 38 is determined. By rotating the fixed plate 38 while aligning the arc 34 of the outer end 33 of the fixed plate 38 with the arc of the positioning portion 193, accurate rotation can be achieved. Furthermore, since the arrow on the positioning portion 193 indicates the direction of rotation, incorrect installation due to reverse rotation can be prevented.

[0073] As shown in FIG. 21, the installation section 18 may be provided with a pair of positioning sections 194 for indicating the fixing positions. The positioning portion 194 is provided so as to be aligned with the long side 42 of the circumscribing rectangle 40 of the fixed plate 38 after the fixed plate 38 is rotated. The positioning portion 194 is a pair of straight lines having a distance L1 equal to the length dimension L1 of the short side 41 of the circumscribing rectangle 40 of the fixed plate 38 . The positioning portion 194 is a mark (such as a laser marking or a color marking) provided on the base 10. The fixing position of the fixing plate 38 is determined by aligning the long side of the fixing plate 38 as the positioning portion 39 with the positioning portion 194.

[0074] Modification of the fixing plate 38 of the mounting fixture 30 (FIG. 22) FIG. 22 shows a modified example of the fixing plate 38 of the mounting fixture 30. In Figure 22, at least a portion of the outer end 33 of the fixing plate 38 is located in an area having a radius from the center C1 in the short direction of the installation portion 18 to half the short direction length dimension L4 of the installation portion 18 to half the short direction length dimension L3 of the placement portion 11.

[0075] In FIG. 22(a), the fixing plate 38 has a rectangular shape, and the outer end portion 33 has a straight shape. The entire outer end 33 of the fixing plate 38 is located in an area from the center C1 in the short direction of the installation portion 18 to a radius of from half R4 of the short direction length dimension L4 of the installation portion 18 to half R3 of the short direction length dimension L3 of the placement portion 11.

[0076] In FIG. 22(b), the outer end 33 of the fixing plate 38 has a mountain shape. The entire outer end 33 of the fixing plate 38 is located in an area from the center C1 in the short direction of the installation portion 18 to a radius of from half R4 of the short direction length dimension L4 of the installation portion 18 to half R3 of the short direction length dimension of the placement portion 11.

[0077] In FIG. 22(c), the fixed plate 38 has a parallelogram shape, and the outer end portion 33 has a straight line shape. The forward portion of the outer end 33 of the fixing plate 38 in the direction of rotation is located in an area from the center C1 in the short direction of the installation portion 18 to a radius ranging from R4, which is half the length dimension L4 of the short direction of the installation portion 18, to R3, which is half the length dimension R4 of the short direction of the placement portion 11. The rearward expansion portion 331 of the outer end portion 33 of the fixing plate 38 in the rotational direction is outside the area having a radius R3 half the length L3 of the arrangement portion 11 in the lateral direction from the center C1 of the installation portion 18 in the lateral direction.

[0078] In FIG. 22(d), the outer end 33 of the fixing plate 38 has a stepped shape, that is, the outer end 33 has a staircase shape. The front half of the outer end 33 of the fixing plate 38 in the rotational direction is located in an area from the center C1 in the short direction of the installation portion 18 to a radius of from half R4 of the short direction length dimension L4 of the installation portion 18 to half R3 of the short direction length dimension of the placement portion 11. The other half of the enlarged portion 331 in the rear direction of the rotational direction of the outer end 33 of the fixed plate 38 exists outside the area having a radius R3 half the length dimension of the placement portion 11 in the lateral direction from the center C1 of the installation portion 18 in the lateral direction.

[0079] In FIG. 22(e), the outer end 33 of the fixed plate 38 has a short side portion and an inclined portion, and the outer end 33 is in the shape of a broken line. The inclined portion of one half of the outer end 33 of the fixed plate 38 in the forward direction of the rotational direction is located in an area from the center C1 in the short direction of the installation portion 18 to a radius of from half R4 of the short direction length dimension L4 of the installation portion 18 to half R3 of the short direction length dimension L3 of the placement portion 11. An enlarged portion 331 of the other half of the short side portion in the rear direction of the rotational direction of the outer end portion 33 of the fixed plate 38 exists outside the area having a radius R3 from the center C1 in the short direction of the installation portion 18, which is half the length dimension of the short direction of the placement portion 11.

[0080] In the cases of Figures 22(a) and (b), the fixture 30 can be rotated in either direction. 22(c), (d), and (e), the mounting fixture 30 can only rotate clockwise. When rotated 90 degrees, the enlarged portion 331 abuts against the bottom surface of the groove portion 13, and rotation is restricted.

[0081] ●Modification of the base 10● (Fig. 23) As shown in FIG. 23, the base 10 may have a groove 13 in the shape of an arc. As shown in FIG. 23(a), the mounting portion 11 may have a ring-shaped mounting tool mounting surface 12, and the groove portion 13 may be bent in an arc shape. As shown in FIG. 23(b), the mounting portion 11 may have an elliptical mounting tool mounting surface 12, and the groove portion 13 may be bent in an arc shape. As long as the radius of the arc of groove portion 13 of base 10 is sufficiently larger than half R3 of the short-side length dimension L3 of placement portion 11 and fixing plate 38 of mounting fixture 30 can be placed in installation portion 18 between protrusions 15, groove portion 13 of base 10 may be arc-shaped. Although not shown, the arrangement section 11 may have a long rectangular shape, and the end side of the protruding section 15 may be an arc. Although not shown, the base 10 may have other shapes as long as the fixing plate 38 can be placed on the installation portion 18 and can rotate.

[0082] Various aspects of the present disclosure are summarized below as appendices.

[0083] (Appendix 1) A base having an elongated arrangement portion; a mounting fixture having a generally rectangular fixing plate fixed to the placement portion; Equipped with The arrangement portion has a groove portion formed along a longitudinal direction so as to be open on the inside in a short side direction, and a long installation portion formed on the opposite side of the groove portion with respect to the open end of the groove portion, in which the mounting tool is installed, The width dimension of the fixing plate in the short side direction is equal to or smaller than the dimension of the installation portion in the short side direction, the fixed plate has an outer end formed at an end in a longitudinal direction of the fixed plate, the outer end being fitted into the groove by rotating the fixed plate about a rotation axis intersecting the fixed plate; A fixing mechanism in which at least one half of the outer end portion is at a distance from the rotation axis that is equal to or less than the sum of half the short-side dimension of the installation portion and the depth dimension of the groove portion.

[0084] (Appendix 2) The fixing mechanism of claim 1, wherein the shape of one half is an arc whose radius from the rotation axis of the fixing plate is less than or equal to the sum of half the short-side dimension of the installation portion and the depth dimension of the groove portion.

[0085] (Appendix 3) 3. The fixing mechanism according to claim 2, wherein the outer end has an overall shape of the arc shape.

[0086] (Appendix 4) The fixing mechanism according to claim 1 or 2, wherein the other half of the outer end portion fitted into the groove portion has an enlarged portion whose distance from the rotation axis is greater than half the short-side dimension of the placement portion.

[0087] (Appendix 5) The mounting fixture has a mounting portion for mounting a member and a connecting portion connecting the mounting portion and the fixed plate, 5. The fixing mechanism according to claim 1, wherein the connecting portion is present in an inner area of ​​a circle whose radius from the rotation axis is half the short-side dimension of the installation portion.

[0088] (Appendix 6) The installation section has a positioning section that positions the mounting fixture, 6. The fixing mechanism according to claim 1, wherein the mounting fixture has an alignment portion that is aligned with the positioning portion.

[0089] (Appendix 7) 7. The fixing mechanism according to claim 1, wherein the mounting fixture is a spring receiver for mounting a spring.

[0090] (Appendix 8) the mounting fixture is a power supply mounting fixture for mounting a power supply unit, the mounting fixture has a mounting portion on which a bottom surface of the power supply unit is placed, The fixing mechanism according to any one of appendices 1 to 6, wherein the mounting portion has an upright portion formed by a base portion of a U-shaped tongue formed by punching the fixing plate into a U shape and cut out from the fixing plate, and a base portion formed by a head portion of the tongue and parallel to the fixing plate.

[0091] (Appendix 9) A light source unit having a fixing mechanism according to any one of Supplementary Note 1 to Supplementary Note 8; a fixture in which the light source unit is fixed using the fixing mechanism; A lighting device comprising:

[0092] (Appendix 10) A method for fixing a mounting fixture having a pair of fixing parts to a base having a pair of opposing grooves, comprising the steps of: a positioning step of positioning the mounting tool between the pair of opposing groove portions such that a positioning direction of the pair of fixing portions is parallel to a direction in which the grooves of the pair of opposing groove portions are formed; a rotating step of rotating the mounting tool in a direction in which the arrangement direction of the pair of fixing parts intersects with the grooves of the pair of opposing groove parts, after the mounting tool is arranged, so that the pair of fixing parts are arranged in the grooves of the pair of opposing groove parts; a fixing step of fixing the pair of fixing portions between the pair of opposing groove portions after rotating the mounting tool; A fixing method comprising:

[0093] Although a plurality of configurations have been described above, two or more of these configurations may be combined for implementation. Alternatively, one of these configurations or a combination of two or more of these configurations may be partially implemented. Note that the present disclosure is not limited to the embodiments, and various modifications are possible as necessary. [Explanation of symbols]

[0094] 100 fixing mechanism, 10 base, 11 placement portion, 12 mounting fixture placement surface, 13 groove portion, 14 erection portion, 15 overhang portion, 151 protrusion portion, 16 groove, 17 light source placement surface, 18 installation portion, 19 positioning portion, 191 positioning portion, 192 positioning portion, 193 positioning portion, 194 positioning portion, 30 mounting fixture, 31 fixing portion, 32 fixing hole, 33 outer end portion, 331 enlarged portion, 34 arc, 35 one half, 36 other half, 37 mounting portion, 38 fixing plate, 39 alignment portion, 40 circumscribed rectangle, 41 short side, 42 long side, 43 circumscribed circle, 44 circumscribed circle, 45 inscribed circle, 46 inscribed circle, 50 spring receiver, 51 spring receiver frame, 52 spring receiver hole, 53 Connection part, 54 connecting part, 55 protruding part, 58 spring support part, 60 power supply mounting fixture, 61 mounting part, 62 side wall part, 63 locking part, 64 punched part, 65 upright part, 66 base part, 67 holding part, 68 fixing plate, 70 fixture, 71 spring, 72 relay part (terminal block), 73 fixture power line, 80 light source unit, 81 board, 82 light source, 83 power supply part, 84 case, 85 case hole, 86 lighting fixture power line, 87 power supply line, 88 holding fixture, 89 cover, 90 lighting device, S10 placement step, S20 rotation step, S30 fixing step, C rotation center, C1 center.

Claims

1. A base having an elongated arrangement portion; a mounting fixture having a generally rectangular fixing plate fixed to the placement portion; Equipped with The arrangement portion has a groove portion formed along a longitudinal direction so as to be open on the inside in a short side direction, and a long installation portion formed on the opposite side of the groove portion with respect to the open end of the groove portion, in which the mounting tool is installed, The dimension of the fixing plate in the short side direction is equal to or smaller than the dimension of the installation portion in the short side direction, the fixed plate has an outer end formed at an end in a longitudinal direction of the fixed plate, the outer end being fitted into the groove by rotating the fixed plate about a rotation axis intersecting the fixed plate; A fixing mechanism in which at least one half of the outer end portion is at a distance from the rotation axis that is equal to or less than the sum of half the short-side dimension of the installation portion and the depth dimension of the groove portion.

2. The fixing mechanism according to claim 1 , wherein the shape of one half is an arc whose radius from the rotation axis of the fixing plate is less than or equal to the sum of half the short-side dimension of the installation portion and the depth dimension of the groove portion.

3. The fastening mechanism of claim 2 , wherein said outer end has an overall shape of said arc.

4. 3. The fixing mechanism according to claim 1, wherein the other half of the outer end portion fitted in the groove portion has an enlarged portion whose distance from the rotation axis is greater than half the dimension of the arrangement portion in the short direction.

5. The mounting fixture has a mounting portion for mounting a member and a connecting portion connecting the mounting portion and the fixed plate, The fixing mechanism according to claim 1 or 2, wherein the coupling portion is present in an area inside a circle whose radius from the rotation axis is half the dimension of the installation portion in the short direction.

6. The installation section has a positioning section that positions the mounting fixture, The fixing mechanism according to claim 1 or 2, wherein the mounting fixture has an alignment portion that is aligned with the positioning portion.

7. 3. The fixing mechanism according to claim 1, wherein the mounting fixture is a spring receiver for mounting a spring.

8. the mounting fixture is a power supply mounting fixture for mounting a power supply unit, the mounting fixture has a mounting portion on which a bottom surface of the power supply unit is placed, The fixing mechanism according to claim 1 or claim 2, wherein the mounting portion has an upright portion formed by a base portion of a U-shaped tongue formed by punching the fixing plate into a U shape and cut out from the fixing plate, and a base portion formed by a head portion of the tongue and parallel to the fixing plate.

9. A light source unit having the fixing mechanism according to claim 1 or 2; a fixture in which the light source unit is fixed using the fixing mechanism; A lighting device comprising:

10. A method for fixing a mounting tool having a pair of fixing parts to a base having a pair of opposing grooves, comprising the steps of: a positioning step of positioning the mounting tool between the pair of opposing groove portions such that a positioning direction of the pair of fixing portions is parallel to a direction in which the grooves of the pair of opposing groove portions are formed; a rotating step of rotating the mounting tool in a direction in which an arrangement direction of the pair of fixing parts intersects with the grooves of the pair of opposing groove parts, after the mounting tool is arranged, so that the pair of fixing parts are arranged in the grooves of the pair of opposing groove parts; a fixing step of fixing the pair of fixing portions between the pair of opposing groove portions after rotating the mounting tool; A fixing method comprising:

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