Lighting fixture

Abstract

To improve workability of assembly work.SOLUTION: A luminaire A1 comprises: a light source unit 2; and an appliance body 1 to which the light source unit 2 is detachably attached, and holding the light source unit 2. The light source unit 2 comprises one or more LED modules 3, a supporting member 4 supporting the LED modules 3, and one or more attachment springs 5 attached to the supporting member 4. Each of the attachment springs 5 comprises one coil part 50, one or more arm parts 51 held by a holding part 103 provided in the appliance body 1, and an attachment part 52 provided integrally with the coil part 50. The attachment part 52 is formed so as to protrude to the outside of the coil part 50 along a radial direction of the coil part 50 with respect to the coil part 50. The attachment part 52 is hooked on a hook part 44 provided in the supporting member 4, and thereby each of the attachment springs 5 is attached to the supporting member 4.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture, and more particularly to a lighting fixture in which a light source unit is detachably attached to a fixture body.

Background Art

[0002] As a conventional example, the lighting fixture described in Patent Document 1 is exemplified. The lighting fixture described in Patent Document 1 (hereinafter referred to as the conventional example) includes a substantially box-shaped body with an open bottom surface, a light source unit, a cover, a power supply unit, a mounting spring, and the like.

[0003] The light source unit and the power supply unit are attached to the body. The power supply unit is connected to the light source unit by an electric wire. The cover is attached to the body so as to cover the power supply unit. The mounting spring is attached to the cover and connects the body and the cover. The mounting spring is attached to the cover via a spring receiver (holding portion).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the conventional example, a component (spring receiver) for attaching the mounting spring to the cover is required, and there is a problem that the assembly work is time-consuming.

[0006] An object of the present disclosure is to provide a lighting fixture capable of improving the workability of the assembly work.

Means for Solving the Problems

[0007] The lighting fixture according to one aspect of the present disclosure includes a light source unit and a fixture body to which the light source unit is detachably attached and which holds the light source unit. The light source unit has one or more light sources, a support member that supports the light sources, and one or more mounting springs attached to the support member. The mounting spring has one coil portion, one or more arm portions held by a holding portion provided in the fixture body, and a mounting portion provided integrally with the coil portion. The mounting portion is formed so as to protrude outside the coil portion along the radial direction of the coil portion with respect to the coil portion. The mounting spring is attached to the support member by hooking the mounting portion on a hooking portion provided on the support member.

Effect of the Invention

[0008] The lighting fixture of the present disclosure has an effect that the workability of the assembly work can be improved.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

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Figure 4

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Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

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Figure 16

Embodiments for Carrying Out the Invention

[0010] The lighting fixture according to the embodiment of the present disclosure will be described in detail with reference to the drawings. However, each of the drawings described in the following embodiments is a schematic diagram, and the respective ratios of the sizes and thicknesses of the respective components do not necessarily reflect the actual dimensional ratios. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications can be made according to the design and the like as long as the effects of the present disclosure can be achieved.

[0011] (1) Outline of the Lighting Fixture According to the Embodiment The lighting fixture A1 according to the embodiment includes a light source unit 2 and a fixture body 1 to which the light source unit 2 is detachably attached and which holds the light source unit 2. The light source unit 2 has one or more light sources (LED modules 3), a support member 4 that supports the light sources, and one or more mounting springs 5 that are attached to the support member 4.

[0012] The mounting spring 5 has a coil portion 50, one or more arm portions 51 held by a holding portion 103 provided on the appliance body 1, and a mounting portion 52 provided integrally with the coil portion 50. The mounting portion 52 is formed to protrude outside the coil portion 50 along the radial direction of the coil portion 50 with respect to the coil portion 50. The mounting spring 5 is attached to the support member 4 by hooking the mounting portion 52 on a hooking portion 44 provided on the support member 4.

[0013] Thus, in the lighting fixture A1 according to the embodiment, since the mounting spring 5 is attached to the support member 4 by hooking the mounting portion 52 on the hooking portion 44 provided on the support member 4, parts (spring receivers) for attaching the mounting spring to the cover as in the conventional example are unnecessary. Therefore, the lighting fixture A1 according to the embodiment can improve the workability of the assembly work as compared with the conventional example.

[0014] (2) Details of the lighting fixture according to the embodiment The lighting fixture A1 according to the embodiment (hereinafter abbreviated as the lighting fixture A1) includes an appliance body 1 and a light source unit 2 (see FIGS. 1 to 4). The lighting fixture A1 is installed, for example, by embedding the appliance body 1 in a recess provided in a ceiling material in a building. In the following description, unless otherwise specified, the up-down, left-right, and front-back directions indicated by arrows in FIG. 2 are defined as the up-down, left-right, and front-back directions of the lighting fixture A1.

[0015] (2-1) Appliance body The appliance body 1 is formed in a box shape having a square opening on the lower surface by joining a cylindrical body 10 formed in a rectangular tube shape and a top plate 11 formed in a rectangular flat plate shape (see FIG. 2). The top plate 11 is formed such that the length in the left-right direction is shorter than the length in the left-right direction of the cylindrical body 10. Therefore, a rectangular window hole 12 is opened at the left end on the upper surface of the appliance body 1 (see FIGS. 1 and 2).

[0016] The cylinder body 10 has a pair of first side walls 101 facing each other in the left-right direction and a pair of second side walls 102 facing each other in the front-back direction. The pair of first side walls 101 and the pair of second side walls 102 are each formed in a long rectangular shape. However, a stepped portion 104 extending over the entire length in the front-back direction is formed at each upper end portion of the pair of second side walls 102. Further, three holes are provided at equal intervals in the left-right direction in the stepped portion 104 of each second side wall 102. In the following description, the edge of each hole in the stepped portion 104 of each second side wall 102 is referred to as a holding portion 103.

[0017] The pair of first side walls 101 and the pair of second side walls 102 are each formed of a metal plate. Then, the cylinder body 10 is constituted by joining both ends in the longitudinal direction (front end and rear end) of the pair of first side walls 101 and both ends in the longitudinal direction (left end and right end) of the pair of second side walls 102 by an appropriate method such as welding.

[0018] The top plate 11 is formed in a rectangular flat plate shape by a metal plate. A power terminal block 13 and a signal terminal 14 are attached to the lower surface of the top plate 11 (see FIG. 2). Further, two cable insertion holes 110 through which a power supply cable is inserted are provided at intervals in the center of the top plate 11. Furthermore, a plurality of bolt insertion holes 111 through which suspension bolts embedded in the ceiling structure of the building can be inserted are provided at intervals in the front-back direction at the left end of the top plate 11.

[0019] The appliance main body 1 is inserted into the embedding hole of the ceiling material and fixed to a plurality of suspension bolts by tightening nuts on the suspension bolts inserted through the bolt insertion holes 111 of the top plate 11 and is embedded in the ceiling.

[0020] (2-1) Light source unit The light source unit 2 includes a plurality (five in the illustrated example) of LED modules 3, support members 4, four mounting springs 5, a power supply unit 6, etc. (see FIGS. 1 - 4).

[0021] (2-1-1) LED module The LED module 3 has a plurality of LEDs 30 and a rectangular substrate 31. The plurality of LEDs 30 are, for example, packaged white LEDs for lighting. The substrate 31 is formed in a rectangular flat plate shape. On the lower surface of the substrate 31, the plurality of LEDs 30 are mounted so as to be arranged at equal intervals along the longitudinal direction of the substrate 31 and in four rows along the short side direction of the substrate 31.

[0022] (2-1-2) Power supply unit The power supply unit 6 has a power supply device 60, a function module 61, and a support plate 62 that supports the power supply device 60 and the function module 61 (see FIG. 4).

[0023] The power supply device 60 has a power supply circuit configured by mounting electronic components on a printed wiring board, and a first case 600 that houses the power supply circuit. The power supply circuit is configured to convert AC power supplied from a commercial power system into DC power through a power cable connected to a power terminal block 13 and supply it to the LED module 3. As shown in FIG. 4, the first case 600 is formed in a long box shape from a metal plate material.

[0024] The function module 61 has a signal processing circuit configured by mounting electronic components on a printed wiring board, and a second case 610 that houses the signal processing circuit. The signal processing circuit is connected to a signal terminal block 14 via a signal line. The signal processing circuit converts a dimming signal (for example, a PWM signal) input from the outside into a control signal composed of a voltage signal and outputs it to the power supply circuit. The dimming signal is a signal representing the dimming level by the duty ratio of the PWM signal. The power supply circuit is configured to adjust the DC power supplied to the LED module 3 according to the control signal received from the signal processing circuit and dim the LED module 3.

[0025] The support plate 62 is formed in a hook-shaped flat plate shape from a metal plate. However, a plurality of side pieces are bent up on the support plate 62. And the power supply unit 6 (the power supply device 60 and the function module 61) is attached to the upper surface of the support plate 62 (see FIG. 4).

[0026] (2-1-3) Support member The support member 4 has a housing 40, a frame body 41, and two connecting plates 42 (see FIGS. 2-4).

[0027] The housing 40 has a bottom plate 400 formed in a square flat plate shape and four wall plates 401 that stand downward from the four edges of the bottom plate 400, and is formed in a square box shape with an open bottom surface (see FIGS. 1 and 3). Five LED modules 3 are respectively screwed to the lower surface of the bottom plate 400 so as to be arranged in a row along the short side direction (see FIG. 3). Further, a support plate 62 is screwed to the upper surface of the bottom plate 400.

[0028] The frame body 41 has a frame plate 410 formed in a square frame shape and four side plates 411 that stand upward from the inner edge on the upper surface of the frame plate 410. The frame body 41 houses the housing 40 inside the four side plates 411. At this time, the panel 43 is sandwiched between the upper surface of the frame body 41 and the lower ends of the four wall plates 401 of the housing 40. Then, the connecting plates 42 are respectively screwed to the centers in the left-right direction of the front and rear side plates 411 of the frame body 41, whereby the housing 40 and the frame body 41 are integrally connected (see FIGS. 2 and 4). Each connecting plate 42 is formed by bending a rectangular metal plate into an L shape along the longitudinal direction.

[0029] The panel 43 is formed in a square flat plate shape by a light-transmissive synthetic resin such as acrylic resin or polycarbonate resin mixed with a diffusing material. That is, the light (lighting light) emitted from the five LED modules 3 attached to the bottom surface of the housing 40 (the lower surface of the bottom plate 400) is diffused when passing through the panel 43 and irradiated onto the lighting space.

[0030] Here, two hook portions 44 for attaching the mounting spring 5 described later are provided on each of the two side plates 411 at the front and rear of the frame body 41 (see FIGS. 2 and 4). The two side plates 411 where the two hook portions 44 are provided each have an upper end portion bent in an inverted U shape (see FIG. 10). Each hook portion 44 is formed in a band shape between two holes 45 arranged longitudinally in the upper portion of the side plate 411 and the upper end portion of the inverted U shape (see FIGS. 2 and 10).

[0031] (2-1-4) Mounting Spring The mounting spring 5 has a coil portion 50, a pair of arm portions 51, and a mounting portion 52 (see FIG. 5). The coil portion 50, the pair of arm portions 51, and the mounting portion 52 are integrally formed of a metal wire.

[0032] The coil portion 50 is formed by spirally winding a plurality of times around the central portion of the wire. The pair of arm portions 51 each extend away from each other from the winding ends on both sides of the coil portion 50. The mounting portion 52 is provided between one arm portion 51 and one winding end of the coil portion 50 (see FIGS. 5 and 6). The mounting portion 52 is formed so as to protrude outward from the coil portion 50 along the radial direction of the coil portion 50 with respect to the coil portion 50. Therefore, a gap D1 is formed between the mounting portion 52 and the coil portion 50 (see FIG. 6).

[0033] Thus, the mounting spring 5 is attached to the support member 4 by hooking the mounting portion 52 on the hook portion 44 provided on the support member 4 (see FIG. 2). However, the two mounting springs 5 attached to the hook portion 44 in front of the support member 4 and the two mounting springs 5 attached to the hook portion 44 behind the support member 4 slightly differ in the shape of the pair of arm portions 51. That is, in the two mounting springs 5 attached to the hook portion 44 in front of the support member 4, hook-shaped bent portions 510 are provided on the pair of arm portions 51 (see FIG. 5).

[0034] (2-1-5) Mounting Procedure of the Mounting Spring to the Support Member Next, the mounting procedure of the mounting spring 5 to the support member 4 will be described. First, the operator inserts the tip of one arm portion 51 through the holes 45 on both sides of the engaging portion 44 (see Fig. 7). At this time, it is preferable that the operator holds the other arm portion 51 so that the mounting portion 52 faces upward with respect to the coil portion 50. Then, with the mounting portion 52 facing upward with respect to the coil portion 50, the operator inserts the engaging portion 44 through the gap D1 between the mounting portion 52 and the coil portion 50 and hooks the mounting portion 52 on the engaging portion 44 (see Fig. 8). The mounting operation of the mounting spring 5 to the support member 4 is completed by the above procedure.

[0035] (3) Construction procedure of the lighting fixture according to the embodiment Next, the construction procedure of the lighting fixture A1 will be described.

[0036] First, the operator inserts the fixture body 1 into the embedding hole of the ceiling material and inserts the suspension bolts through the bolt insertion holes 111 of the top plate 11. Then, the operator fixes the fixture body 1 to the plurality of suspension bolts by tightening nuts on the suspension bolts inserted through the bolt insertion holes 111 and protruding below the top plate 11. Then, the operator connects the power cable drawn from the cable insertion hole 110 of the top plate 11 to the power terminal block 13, and also connects the signal line drawn from the cable insertion hole 110 to the signal terminal block 14.

[0037] Subsequently, the operator suspends the light source unit 2 from the fixture body 1 using the two mounting springs 5 attached in front of the support member 4. Specifically, the operator bends the pair of arm portions 51 of the two mounting springs 5 toward each other and hooks the tip of each arm portion 51 on one of the two holding portions 103 in front of the fixture body 1. As a result, the light source unit 2 is suspended from the fixture body 1 by hooking the respective arm portions 51 of the two mounting springs 5 on the holding portions 103 of the fixture body 1 (see Fig. 4). Note that this state is called a temporary suspension state.

[0038] In the temporarily suspended state, the operator electrically connects the power terminal block 13 and the power supply device 60 with a power cable and electrically connects the signal terminal block 14 and the function module 61 with a signal line.

[0039] After the operator finishes the wiring work, the operator hooks the tips of the pair of arms 51 of the two mounting springs 5 attached to the rear of the support member 4 one by one to the two holding portions 103 behind the instrument body 1. At this time, the light source unit 2 is suspended by the four mounting springs 5 substantially parallel to the ceiling material with respect to the instrument body 1.

[0040] Then, the operator pushes up the light source unit 2 and inserts the light source unit 2 into the instrument body 1 through the opening on the lower surface of the instrument body 1. At this time, when the light source unit 2 moves upward, the four mounting springs 5 cause the respective arms 51 to spread in a direction away from each other by the elastic force of the coil portion 50. Then, when the operator pushes up the light source unit 2 until the frame plate 410 of the light source unit 2 hits the ceiling material, the four mounting springs 5 are held by the four holding portions 103 of the instrument body 1, and the light source unit 2 can be attached to the instrument body 1 (see FIG. 1).

[0041] The installation work of the lighting fixture A1 is completed as described above.

[0042] (4) Features of the lighting fixture according to the embodiment In the lighting fixture A1 as described above, the hooking portion 44 on which the mounting portion 52 of the mounting spring 5 is hooked is directly provided on the side plate 411 of the frame body 41 constituting the support member 4. In other words, the support member 4 does not have a member for the sole purpose of mounting the mounting spring 5. Therefore, compared with the case where the lighting fixture A1 requires a member for mounting the mounting spring 5 separately from the support member 4, the number of parts can be reduced and the workability of the assembly work can be improved.

[0043] In addition, the attachment portion 52 of the attachment spring 5 is formed in an arc shape larger than the diameter of the coil portion 50. That is, by forming the attachment portion 52 in an arc shape, for example, compared with the case where the attachment portion 52 is formed in a polygonal shape, the processing work when forming the coil portion 50 and the attachment portion 52 from a metal wire rod can be simplified. However, it goes without saying that even if the attachment portion 52 of the lighting fixture A1 is formed in a polygonal shape, the number of parts can be reduced and the workability of the assembly work can be improved.

[0044] Furthermore, since the attachment portion 52 is provided between one end of the coil portion 50 and the arm portion 51, when the attachment portion 52 is hooked on the hooking portion 44, it becomes difficult for the coil portion 50 and the hooking portion 44 to come into contact. As a result, the lighting fixture A1 can improve the workability when hooking the attachment portion 52 on the hooking portion 44.

[0045] Also, the attachment spring 5 is formed so as to separate the boundary portion between the attachment portion 52 and the arm portion 51 from the coil portion 50. Specifically, a gap D1 is formed between the attachment portion 52 and the coil portion 50 in the attachment spring 5 (see FIG. 6). That is, the hooking portion 44 is inserted into the attachment portion 52 through the gap D1 between the attachment portion 52 and the coil portion 50, whereby the attachment portion 52 is hooked on the hooking portion 44. Therefore, the lighting fixture A1 can further improve the workability when hooking the attachment portion 52 on the hooking portion 44. However, if the gap D1 is made too large, the attachment portion 52 is likely to come off from the hooking portion 44. Therefore, it is preferable that the gap D1 be set to a size that can achieve both the workability when hooking the attachment portion 52 on the hooking portion 44 and the difficulty of the attachment portion 52 coming off from the hooking portion 44.

[0046] By the way, a part of the support member 4 (the frame plate 410) is formed so that the arm portion 51 hits when the coil portion 50 rotates around the axis of the coil portion 50 (see FIG. 9). That is, when the arm portion 51 hits the frame plate 410, the rotation of the coil portion 50 is restricted. As a result, the lighting fixture A1 can prevent the attachment portion 52 of the attachment spring 5 from inadvertently coming off from the hooking portion 44 of the support member 4.

[0047] Further, the engaging portion 44 is provided at the end of the support member 4 (the side plate 411 of the frame body 41). And the mounting spring 5 is attached to the support member 4 so as to bring the mounting portion 52 closer to the end of the support member 4 with respect to the coil portion 50 (see FIG. 10). In other words, in a state where the mounting spring 5 is attached to the support member 4, the mounting portion 52 is located outside (the side closer to the end of the side plate 411) than the coil portion 50.

[0048] Thus, when the light source unit 2 is attached to the fixture main body 1, since the mounting portion 52 is located outside the support member 4 and the coil portion 50 is located inside the support member 4 rather than the mounting portion 52, it is difficult for the mounting spring 5 to hit the fixture main body 1. As a result, the lighting fixture A1 can prevent the fixture main body 1 from being damaged by the mounting spring 5 when the light source unit 2 is attached to the fixture main body 1.

[0049] On the other hand, when the mounting spring 5 is attached to the support member 4, by reversing the mounting spring 5, the mounting portion 52 is located inside the support member 4 and the coil portion 50 is located outside the support member 4 rather than the mounting portion 52 (see FIG. 8). Therefore, the lighting fixture A1 can improve the workability when attaching the mounting spring 5 to the support member 4 while preventing the fixture main body 1 from being damaged by the mounting spring 5.

[0050] Further, the engaging portion 44 is formed in a strip shape between two holes 45 formed in the side plate 411 of the frame body 41 constituting the support member 4 (see FIG. 11). And the diameter R1 of the coil portion 50 is made larger than the width R2 of each of the plurality of holes 45.

[0051] Thus, since the mounting spring 5 is configured as described above, when the coil portion 50 moves in the radial direction, the movement of the coil portion 50 is restricted at a position where the mounting portion 52 hits the edge of the hole 45 in the side plate 411 (see FIG. 11). Therefore, the lighting fixture A1 can prevent the mounting spring 5 from being inadvertently detached from the support member 4.

[0052] Here, the mounting spring 5 is rotatably supported by the support member 4 between a state of falling along the side plate 411 (see FIG. 8) and a state of standing up along the side plate 411 (see FIG. 10). And the height H1 from the bottom plate 400 of the side plate 411 is higher than the height H2 along the side plate 411 of the mounting spring 5. That is, when the mounting spring 5 is in a state of falling along the side plate 411 (see FIG. 8), it is less likely for the mounting spring 5 to hit the packing material during the packing of the light source unit 2, so that the workability of the packing operation can be improved.

[0053] (5) Modification example of the lighting fixture according to the embodiment Next, a modification example of the lighting fixture A1 according to the embodiment will be described. However, the lighting fixture A1 of the modification example is characterized by the mounting spring 5, and the configuration other than the mounting spring 5 is common to the lighting fixture A1 according to the embodiment. Therefore, the illustration and description of the configuration common to the lighting fixture A1 according to the embodiment will be appropriately omitted.

[0054] (5-1) Configuration of the mounting spring in the lighting fixture of the modification example The mounting spring 5 in the lighting fixture A1 of the modification example has a basic configuration common to the mounting spring 5 in the lighting fixture A1 according to the embodiment, as shown in FIG. 12. Therefore, for the configuration that is functionally common to the mounting spring 5 (hereinafter abbreviated as the mounting spring 5 of the embodiment) in the lighting fixture A1 according to the embodiment, the same reference numerals may be used and the description may be omitted.

[0055] The mounting spring 5 (hereinafter abbreviated as the mounting spring 5 of the modification example) in the lighting fixture A1 of the modification example is different from the mounting spring 5 of the embodiment in that it has a bent portion 53. Also, the winding direction of the coil portion 50 in the mounting spring 5 of the modification example is opposite to that of the mounting spring 5 of the embodiment (see FIGS. 6 and 13).

[0056] The bent portion 53 is provided at the portion where one arm portion 51 and the mounting portion 52 are connected (see Fig. 12A). The bent portion 53 is formed to bend from the end of the mounting portion 52 toward the coil portion 50 along the radial direction of the coil portion 50 (see Figs. 12A and 13). However, the bent portion 53 may be provided at the portion where the coil portion 50 and the mounting portion 52 are connected, or may be provided at both the portion where the arm portion 51 and the mounting portion 52 are connected and the portion where the coil portion 50 and the mounting portion 52 are connected.

[0057] Here, in the mounting spring 5 of the modified example, a gap D2 is formed between the bent portion 53 and the coil portion 50 (see Fig. 13). This gap D2 is narrower than the gap D1 (see Fig. 6) between the mounting portion 52 and the coil portion 50 in the mounting spring 5 of the embodiment (D2 < D1).

[0058] (5-2) Mounting procedure of the mounting spring of the modified example to the support member Next, the procedure for attaching the mounting spring 5 of the modified example to the support member 4 will be described. First, the operator inserts the tip of the arm portion 51 connected to the bent portion 53 into the holes 45 on both sides of the hook portion 44 (see Fig. 14). At this time, it is preferable that the operator holds the other arm portion 51 so that the mounting portion 52 is on top with respect to the coil portion 50. Then, with the mounting portion 52 on top with respect to the coil portion 50, the operator inserts the hook portion 44 through the gap D2 between the bent portion 53 and the coil portion 50 and hooks the mounting portion 52 on the hook portion 44 (see Fig. 15). The mounting operation of the mounting spring 5 to the support member 4 is completed by the above procedure.

[0059] (5-3) Features of the lighting fixture of the modified example Similar to the lighting fixture A1 according to the embodiment, the lighting fixture A1 of the modified example does not require a member for mounting the mounting spring 5 separately from the support member 4, so the workability of the assembly work can be improved. And the lighting fixture A1 of the modified example has the following features in addition to the features of the lighting fixture A1 according to the embodiment.

[0060] The mounting spring 5 of the modification has a bent portion 53 that bends along the radial direction of the coil portion 50 toward the coil portion 50. As a result, compared with the mounting spring 5 of the embodiment, the interval (gap D2) between the coil portion 50 and the bent portion 53 is narrowed. Therefore, in the state where the arm portion 51 of the mounting spring 5 of the modification is bent inward, when viewed from the axial direction of the coil portion 50, the bent portion 53 overlaps the coil portion 50 (see FIG. 15). Accordingly, even when an axial force is applied to the coil portion 50 or the arm portion 51 in the state where the arm portion 51 is bent inward, the arm portion 51 and the coil portion 50 hit each other, so that the deformation of the arm portion 51 in the axial direction of the coil portion 50 is suppressed.

[0061] Furthermore, the mounting spring 5 of the modification is attached to the support member 4 so as to bring the coil portion 50 closer to the end of the support member 4 with respect to the attachment portion 52. In other words, in the state where the mounting spring 5 of the modification is attached to the support member 4, the attachment portion 52 is located inside (the side farther from the end of the side plate 411) than the coil portion 50 (see FIG. 16).

[0062] Here, when the operator attaches the light source unit 2 to the instrument body 1, the operator bends the arm portion 51 of the mounting spring 5 inward from the inside of the support member 4 (the left side in FIGS. 10 and 16) and hooks it on the holding portion 103 of the instrument body 1. At this time, in the mounting spring 5 of the modification, since the attachment portion 52 is located inside the coil portion 50, when an outward force (rightward in FIG. 16) is applied to the arm portion 51, the arm portion 51 hits the coil portion 50, so that the deformation of the arm portion 51 is suppressed. Note that, also in the mounting spring 5 of the embodiment, if the mounting spring 5 is attached to the instrument body 1 so that the attachment portion 52 is located inside the coil portion 50, the deformation of the arm portion 51 is similarly suppressed.

[0063] (6) Summary The lighting fixture (A1) according to the first aspect of the present disclosure includes a light source unit (2) and a fixture body (1) to which the light source unit (2) is detachably attached and which holds the light source unit (2). The light source unit (2) has one or more light sources (LED module 3), a support member (4) that supports the light source, and one or more mounting springs (5) attached to the support member (4). The mounting spring (5) has a coil portion (50), one or more arm portions (51) held by a holding portion (103) provided in the fixture body (1), and a mounting portion (52) provided integrally with the coil portion (50). The mounting portion (52) is formed so as to protrude outside the coil portion (50) along the radial direction of the coil portion (50) with respect to the coil portion (50). The mounting spring (5) is attached to the support member (4) by hooking the mounting portion (52) on a hooking portion (44) provided on the support member (4).

[0064] In the lighting fixture (A1) according to the first aspect, since the hooking portion (44) on which the mounting portion (52) of the mounting spring (5) is hooked is provided on the support member (4), the parts for mounting the mounting spring (5) can be reduced. As a result, the lighting fixture (A1) according to the first aspect can improve the workability of the assembly work.

[0065] The lighting fixture (A1) according to the second aspect of the present disclosure can be realized by combination with the first aspect. In the lighting fixture (A1) according to the second aspect, it is preferable that the hooking portion (44) is provided directly on the plate material forming the support member (4).

[0066] In the lighting fixture (A1) according to the second aspect, since the hooking portion (44) is provided directly on the plate material forming the support member (4), the parts for mounting the mounting spring (5) can be further reduced. As a result, the lighting fixture (A1) according to the second aspect can further improve the workability of the assembly work.

[0067] The lighting fixture (A1) according to the third aspect of the present disclosure can be realized by a combination with the first or second aspect. In the lighting fixture (A1) according to the third aspect, it is preferable that the attachment portion (52) is formed in an arc shape larger than the diameter of the coil portion (50).

[0068] For the lighting fixture (A1) according to the third aspect, for example, when the coil portion (50) and the attachment portion (52) are formed from a metal wire rod, the wire rod processing operation can be simplified.

[0069] The lighting fixture (A1) according to the fourth aspect of the present disclosure can be realized by a combination with any of the first to third aspects. In the lighting fixture (A1) according to the fourth aspect, it is preferable that the attachment portion (52) is provided between one winding end of the coil portion (50) and the arm portion (51).

[0070] When the attachment portion (52) of the lighting fixture (A1) according to the fourth aspect is hooked on the hooking portion (44), it becomes difficult for the coil portion (50) and the hooking portion (44) to come into contact. As a result, the lighting fixture (A1) according to the fourth aspect can improve the workability when hooking the attachment portion (52) on the hooking portion (44).

[0071] The lighting fixture (A1) according to the fifth aspect of the present disclosure can be realized by a combination with any of the first to fourth aspects. In the lighting fixture (A1) according to the fifth aspect, it is preferable that the attachment spring (5) is formed so as to separate the boundary portion between the attachment portion (52) and the arm portion (51) from the coil portion (50).

[0072] The lighting fixture (A1) according to the fifth aspect can further improve the workability when hooking the attachment portion (52) on the hooking portion (44).

[0073] The lighting fixture (A1) according to the sixth aspect of the present disclosure can be realized by a combination with any of the first to fifth aspects. In the lighting fixture (A1) according to the sixth aspect, it is preferable that a part (frame plate 410) of the support member (4) is formed such that the arm portion (51) hits when the coil portion (50) rotates around the axis of the coil portion (50).

[0074] In the lighting fixture (A1) according to the sixth aspect, since the rotation of the coil portion (50) is restricted by the arm portion (51) hitting a part of the support member (4), it is possible to prevent the attachment portion (52) of the attachment spring (5) from accidentally coming off from the hook portion (44) of the support member (4).

[0075] The lighting fixture (A1) according to the seventh aspect of the present disclosure can be realized by a combination with any of the first to sixth aspects. In the lighting fixture (A1) according to the seventh aspect, it is preferable that the hook portion (44) is provided at the end of the support member (4). The attachment spring (5) is preferably attached to the support member (4) so as to bring the attachment portion (52) closer to the end of the support member (4) with respect to the coil portion (50).

[0076] In the lighting fixture (A1) according to the seventh aspect, since the attachment portion (52) is located outside the support member (4) and the coil portion (50) is located inside the support member (4) rather than the attachment portion (52), it is less likely that the attachment spring (5) hits the fixture body (1). As a result, the lighting fixture (A1) according to the seventh aspect can prevent the fixture body (1) from being damaged by the attachment spring (5).

[0077] The lighting fixture (A1) according to the eighth aspect of the present disclosure can be realized by a combination with any of the first to seventh aspects. In the lighting fixture (A1) according to the eighth aspect, the support member (4) preferably has a bottom plate (400) to which a light source is attached and a side plate (411) protruding from the periphery of the bottom plate (400) in a direction away from the light source along the thickness direction of the bottom plate (400). The hanging portion (44) is preferably formed in a band shape between a plurality of holes (45) formed in the side plate (411). The diameter of the coil portion (50) is preferably larger than the width of each of the plurality of holes (45).

[0078] In the lighting fixture (A1) according to the eighth aspect, when the mounting spring (5) moves in the radial direction of the coil portion (50), the movement of the coil portion (50) is restricted at a position where the mounting portion (52) hits the edge of the hole (45). As a result, the lighting fixture (A1) according to the eighth aspect can prevent the mounting spring (5) from accidentally coming off the support member (4).

[0079] The lighting fixture (A1) according to the ninth aspect of the present disclosure can be realized by a combination with the eighth aspect. In the lighting fixture (A1) according to the ninth aspect, the mounting spring (5) is preferably supported by the support member (4) rotatably between a state of falling along the side plate (411) and a state of standing up along the side plate (411). The height of the side plate (411) from the bottom plate (400) is preferably higher than the height of the mounting spring (5) along the side plate (411).

[0080] In the lighting fixture (A1) according to the ninth aspect, when the mounting spring (5) is in a state of falling along the side plate (411), it becomes difficult for the mounting spring (5) to hit the packaging material during packaging, so that the workability of the packaging operation can be improved.

[0081] The lighting fixture (A1) according to the tenth aspect of the present disclosure can be realized by a combination with any of the first to sixth aspects. In the lighting fixture (A1) according to the tenth aspect, it is preferable that the hanging portion (44) is provided at the end of the support member (4). The mounting spring (5) is preferably attached to the support member (4) so as to bring the coil portion (50) closer to the end of the support member (4) with respect to the mounting portion (52).

[0082] In the lighting fixture (A1) according to the tenth aspect, when the arm portion (51) is bent, the deformation of the arm portion (51) is suppressed by hitting against the coil portion (50).

[0083] The lighting fixture (A1) according to the eleventh aspect of the present disclosure can be realized by a combination with any of the first to tenth aspects. In the lighting fixture (A1) according to the eleventh aspect, it is preferable that the mounting spring (5) has a bent portion (53) bent in a direction approaching the coil portion (50) along the radial direction of the coil portion (50). The bent portion (53) is preferably provided in at least one of the portion where the arm portion (51) and the mounting portion (52) are connected and the portion where the coil portion (50) and the mounting portion (52) are connected.

[0084] In the lighting fixture (A1) according to the eleventh aspect, since the mounting spring (5) has the bent portion (53), the distance (gap D2) between the coil portion (50) and the bent portion (53) is narrowed. As a result, in the lighting fixture (A1) according to the eleventh aspect, when the arm portion (51) is bent, the deformation of the arm portion (51) is further suppressed by hitting against the coil portion (50).

[0085] The lighting fixture (A1) according to the twelfth aspect of the present disclosure can be realized by a combination with the eleventh aspect. In the lighting fixture (A1) according to the twelfth aspect, it is preferable that the bent portion (53) is provided at the portion where the arm portion (51) and the mounting portion (52) are connected. The bent portion (53) preferably overlaps the coil portion (50) when viewed from the axial direction of the coil portion (50) in the process of displacement of the arm portion (51).

[0086] In the lighting fixture (A1) according to the twelfth aspect, even when an axial force of the coil portion (50) is applied to the coil portion (50) or the arm portion (51) in a state where the arm portion (51) is bent, the arm portion (51) and the coil portion (50) hit each other, thereby suppressing the deformation of the arm portion (51) in the axial direction of the coil portion (50).

Explanation of Signs

[0087] A1 Lighting fixture 1 Appliance main body 2 Light source unit 3 LED module (light source) 4 Support member 5 Mounting spring 44 Hanging portion 45 Hole 50 Coil portion 51 Arm portion 52 Mounting portion 53 Bending portion 103 Holding portion 400 Bottom plate 411 Side plate 410 Frame plate (part of support member)

Claims

1. A light source unit, An instrument body to which the light source unit is detachably attached and which holds the light source unit, Comprising, The light source unit, One or more light sources, A support member that supports the light source, One or more mounting springs attached to the support member, Having, The mounting spring, One coil portion, One or more arm portions held by a holding portion provided on the instrument body, A mounting portion provided integrally with the coil portion, Having, The mounting portion is formed so as to protrude outside the coil portion along the radial direction of the coil portion with respect to the coil portion, The mounting spring is attached to the support member by the mounting portion being hooked on a hooking portion provided on the support member, A lighting fixture.

2. The hooking portion is directly provided on the plate material forming the support member, The lighting fixture according to Claim 1.

3. The mounting portion is formed in an arc shape larger than the diameter of the coil portion, The lighting fixture according to Claim 1 or 2.

4. The mounting portion is provided between one end of the coil portion and the arm portion, The lighting fixture according to any one of Claims 1 - 3.

5. The mounting spring is formed so as to separate the boundary portion between the mounting portion and the arm portion from the coil portion, The lighting fixture according to any one of Claims 1 - 4.

6. A part of the support member is formed such that the arm portion hits when the coil portion rotates around the axis of the coil portion, The lighting fixture according to any one of Claims 1 - 5.

7. The hooking portion is provided at the end of the support member, The mounting spring is attached to the support member so as to bring the mounting portion closer to the end of the support member with respect to the coil portion, The lighting fixture according to any one of Claims 1 - 6.

8. The support member, A bottom plate to which the light source is attached, A side plate protruding in a direction away from the light source along the thickness direction of the bottom plate from the periphery of the bottom plate, Having, The hooking portion is formed in a band shape between a plurality of holes formed in the side plate, The diameter of the coil portion is larger than the width of each of the plurality of holes, The lighting fixture according to any one of Claims 1 - 7.

9. The mounting spring is rotatably supported by the support member between a state of falling along the side plate and a state of standing along the side plate, The height of the side plate from the bottom plate is higher than the height of the mounting spring along the side plate, The lighting fixture according to claim 8.

10. The hanging portion is provided at an end of the support member, The mounting spring is attached to the support member so as to bring the coil portion closer to the end of the support member with respect to the mounting portion. The lighting fixture according to any one of claims 1 to 6.

11. The mounting spring is provided at at least one of a portion where the arm portion and the mounting portion are connected and a portion where the coil portion and the mounting portion are connected, and has a bent portion that bends in a direction approaching the coil portion along the radial direction of the coil portion. The lighting fixture according to any one of claims 1 to 9.

12. The bent portion is provided at a portion where the arm portion and the mounting portion are connected, and overlaps the coil portion when viewed from the axial direction of the coil portion during the displacement of the arm portion. The lighting fixture according to claim 11.

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