JP7462160B2 - Adapter and lighting device - Google Patents

Description

This disclosure relates to an adapter and a lighting device.

Conventionally, adapters are known for electrically and mechanically connecting a lighting fixture to a ceiling hook installed on the ceiling.

A lighting fixture adapter, which is an example of a conventional adapter, has a connection part to which a lighting fixture connector is connected to electrically connect the lighting fixture and the lighting fixture adapter. The connection part is electrically connected to a connector provided at the end of the wiring of the lighting fixture so that the lighting fixture is electrically connected to the lighting fixture adapter (see, for example, Patent Document 1).

Patent No. 6152940

However, there is a demand for suppressing the shaking of the lighting fixture relative to the adapter after electrically and mechanically connecting the lighting fixture and the ceiling hook, more than with the adapter of Patent Document 1. Therefore, it is possible to suppress the shaking of the lighting fixture relative to the adapter by providing the lighting fixture with a packing or the like that abuts against the wall surface on which the ceiling hook is placed. However, this creates problems with the appearance of the lighting fixture, such as the packing being visible.

Therefore, this disclosure provides an adapter and lighting device that can prevent deterioration of the appearance of the lighting fixture and suppress the shaking of the lighting fixture.

An adapter according to one aspect of the present disclosure is an adapter for electrically and mechanically connecting a hook-in ceiling fixture and a lighting fixture, the adapter comprising a connector portion having a first power supply portion electrically connected to a first power supply terminal provided on the lighting fixture, and a second power supply portion electrically connected to a second power supply terminal provided on the lighting fixture so as to surround the first power supply terminal, the first power supply portion has a first connection terminal electrically connected to the first power supply terminal, the second power supply portion is formed so as to surround the periphery of the first connection terminal and has a first engagement portion which engages with the second power supply terminal and a second connection terminal which is electrically connected to the second power supply terminal engaged with the first engagement portion, the first engagement portion has a protrusion which abuts against the second power supply terminal so as to support the second power supply terminal, the second power supply portion is elastically deformable and has a second engagement portion which engages with the second power supply terminal, the second engagement portions are a pair of elastic claw portions which are provided on the second power supply portion so as to sandwich the second power supply terminal .

In addition, a lighting device according to one aspect of the present disclosure includes an adapter and a lighting fixture electrically connected to the adapter.

The adapters and the like disclosed herein can prevent deterioration of the appearance of the lighting fixture and can also prevent the lighting fixture from shaking.

FIG. 1 is a perspective view showing a lighting device having a lighting fixture and an adapter, and a ceiling hook, and a partially enlarged view of a cutout portion of a housing in an embodiment. FIG. 2 is a cross-sectional view of the lighting device taken along line II-II in FIG. FIG. 3 is an exploded perspective view showing the adapter according to the embodiment. 4 is a partially enlarged cross-sectional view taken along line IV-IV in FIG. 1, showing a first state in which the lighting fixture is normally fixed to the adapter. FIG. 5 is a plan view of the adaptor according to the embodiment and a partially enlarged view showing a pair of elastic claws and a protrusion of the adaptor. FIG. 6A is a cross-sectional view of the adapter taken along line VIA-VIA in FIG. 6B is a cross-sectional view of the adapter taken along line VIB-VIB in FIG. FIG. 7 is a plan view showing the amount of projection of the first and second locking portions from the outer circumferential surface of the adapter. FIG. 8 is a side view showing the second locking portion as viewed from the side. FIG. 9 is a side view showing the second locking portion as viewed from the front. FIG. 10 is a cross-sectional view showing the adapter taken along line XX in FIG. FIG. 11 is a plan view of the adapter showing a state in which the unlock button is pressed in according to the embodiment. 12 is a plan view of the adapter taken along line XII-XII in FIG. 11, showing a state in which the unlock button is pressed in. FIG. FIG. 13 is a partially enlarged cross-sectional view showing a second state in which the lighting fixture is temporarily fastened to the adaptor in the embodiment. FIG. 14 is a perspective view showing a lighting device having a lighting fixture and an adapter, and a hook ceiling. FIG. 15 is a partially enlarged cross-sectional view showing a first state in which the lighting fixture is normally fixed to the adapter.

The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component placement and connection forms, steps, and order of steps shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not described in an independent claim are described as optional components.

The figures are schematic diagrams and are not necessarily drawn precisely. In each figure, the same components are given the same reference numerals. In the following embodiments, expressions such as "approximately parallel" are used. For example, "approximately parallel" does not only mean completely parallel, but also means substantially parallel, that is, including an error of, for example, about a few percent. Furthermore, "approximately parallel" means parallel within the range in which the effects of the present disclosure can be achieved. The same applies to other expressions using "approximately."

In the following description, the vertical direction of the lighting device is referred to as the Z-axis direction, and the direction in which the first and second locking parts are aligned is referred to as the Y-axis direction. The directions perpendicular to the Z-axis direction and the Y-axis direction are referred to as the X-axis direction. In addition, the vertically upward direction in the Z-axis direction is referred to as the Z-axis positive direction, and the opposite direction is referred to as the Z-axis negative direction. The same applies to Figure 2 and subsequent figures.

The following describes the embodiment in detail with reference to the drawings.

(Embodiment)
<Configuration>
Fig. 1 is a perspective view showing an illumination device 1 having a lighting fixture 100 and an adapter 10, and a ceiling hook 3 in an embodiment, and a partially enlarged view of a cutout portion 21h of a housing 20. Fig. 2 is a cross-sectional view of the illumination device 1 taken along line II-II in Fig. 1.

As shown in FIG. 1, the lighting device 1 is a device that is fixed to a ceiling, a wall, etc., and can illuminate the surrounding space to which it is fixed. The lighting device 1 is, for example, a ceiling light, a base light, etc. Specifically, the lighting device 1 is fixed to a ceiling hook 3 arranged on the ceiling while being electrically and mechanically connected to the ceiling hook 3.

Figure 3 is an exploded perspective view of the adapter 10 according to the embodiment.

As shown in Figures 1 to 3, the lighting device 1 includes an adapter 10 and a lighting fixture 100.

<Adapter 10>
The adapter 10 is an adapter for a lighting fixture that electrically and mechanically connects the ceiling hook 3 on the ceiling and the lighting fixture 100. The adapter 10 is attached to and fixed to the ceiling hook 3 by being rotated relative to the ceiling hook 3.

The adapter 10 includes a housing 20, a first locking portion 31 and a second locking portion 32, an elastic member 40, a first terminal 51 and a second terminal 52, a third terminal 53 and a fourth terminal 54, a connector portion 70, a locking portion 80, and an unlocking button 90. The first terminal 51 and the third terminal 53 constitute a first connecting terminal 50a. The second terminal 52 and the fourth terminal 54 constitute a second connecting terminal 50b.

[Housing 20]
The housing 20 is a cylindrical container that is flattened in the Z-axis direction and that houses each component of the adapter 10. The housing 20 is provided with a first connection terminal 50a, a second connection terminal 50b, a connector portion 70, a first locking portion 31, and a second locking portion 32.

The housing 20 has a front surface 10a, which faces the ceiling-mounted hook 3 and is the mounting surface, and a back surface 10b on the opposite side to the front surface 10a. The front surface 10a is the surface on the positive side of the Z axis and is approximately parallel to the X-Y plane. The back surface 10b is the surface on the negative side of the Z axis and is approximately parallel to the X-Y plane. The housing 20 has the front surface 10a, and is mounted to the ceiling-mounted hook 3 with the front surface 10a facing the surface of the ceiling-mounted hook 3.

The housing 20 has a main body 21 that forms the front surface 10a and a cover 22 that forms the back surface 10b.

The main body 21 is made of an insulating resin material and is a cylindrical container with a flat bottom in the Z-axis direction that houses each of the components of the adapter 10. The main body 21 has a cylindrical side wall 21a that opens at the end on the negative Z-axis side, and a bottom 21b whose end on the positive Z-axis side forms the surface 10a of the housing 20.

As shown in FIG. 1, the hook blade 51a of the first terminal 51 and the hook blade 52a of the second terminal 52 protrude in the positive direction of the Z axis from the surface 10a of the main body 21. The bottom 21b of the main body 21 is formed with insertion holes through which the first terminal 51 and the second terminal 52 are inserted.

At the center of the surface 10a of the main body 21, a reference surface 29 is formed on the surface on the positive side of the Z axis, which is the contact surface that comes into contact with the ceiling-mounted hook 3 when the adapter 10 is attached to the ceiling-mounted hook 3 in FIG. 1. The reference surface 29 has a generally rectangular frame shape in plan view.

Figure 4 is a partially enlarged cross-sectional view taken along line IV-IV in Figure 1, showing the first state in which the lighting device 100 is properly fixed to the adapter 10.

3 and 4, the side wall 21a of the main body 21 is formed with a first opening 21c, a second opening 21d, and a pair of cutouts 21h. The side wall 21a is an outer peripheral surface between the front surface 10a and the back surface 10b of the main body 21, and forms the outer peripheral surface 10c of the adapter 10. When the first locking portion 31 is inserted through the first opening 21c, the first locking portion 31 protrudes outward (radially) from the outer peripheral surface 10c of the main body 21. When the second locking portion 32 is inserted through the second opening 21d, the second locking portion 32 protrudes outward from the outer peripheral surface 10c of the main body 21. The outer peripheral surface 10c of the main body 21 constitutes a part of the outer peripheral surface 10c of the adapter 10.

The pair of cutouts 21h expose the first locking portion 31 and the second locking portion 32 on the side opposite to the side where the connector portion 70 of the housing 20 is arranged. The pair of cutouts 21h correspond one-to-one to the first locking portion 31 and the second locking portion 32, and also correspond one-to-one to the first opening 21c and the second opening 21d. When the back surface 10b of the adapter 10 is viewed in plan, the pair of cutouts 21h are cut out from the first opening 21c and the second opening 21d toward the first insertion opening 22a so as to expose the first locking portion 31 and the second locking portion 32. In other words, the pair of cutouts 21h are cut out from the first opening 21c and the second opening 21d toward the first insertion opening 22a on the back surface 10b of the adapter 10. Therefore, the pair of cutouts 21h are continuous with the first opening 21c and the second opening 21d.

1 and 3, the side wall 21a of the main body 21 is formed with a second convex portion 21e that engages with a first convex portion 124 formed on the holder 120 of the lighting fixture 100. The second convex portion 21e rotates around the central axis O of the adapter 10 (rotating the lighting fixture 100 in a predetermined direction) to engage with the first convex portion 124 of the holder 120 and release the first state in which the lighting fixture 100 is fixed to the adapter 10. In other words, when the first state in which the lighting fixture 100 is fixed to the adapter 10 is released, the second convex portion 21e engages with the first convex portion 124 formed on the lighting fixture 100, transitioning the first state in which the lighting fixture 100 is fixed to the adapter 10 to a second state of temporary fixation, and temporarily fixing the lighting fixture 100 to the adapter 10. The second convex portion 21e protrudes radially from the outer circumferential surface 10c of the side wall portion 21a. The second convex portion 21e has an inclined surface 21e1 that is inclined with respect to the Z-axis direction. The inclined surface 21e1 is inclined downward with respect to the rotation direction of the lighting device 100. In this embodiment, the lighting device 100 rotates in only two directions (clockwise and counterclockwise), so the second convex portion 21e has two inclined surfaces 21e1. In this embodiment, the second convex portion 21e is substantially triangular when the outer peripheral surface 10c of the side wall portion 21a is viewed in plan. Here, the central axis O is substantially parallel to the Z-axis direction.

When the lighting device 100 rotates, the first convex portion 124 of the lighting device 100 slides in contact with the inclined surface 21e1 of the second convex portion 21e, and the first convex portion 124 and the second convex portion 21e exert a biasing force that moves the lighting device 100 in the negative direction of the Z axis.

The cover 22 is, for example, made of an insulating resin material, and is a plate-like member that covers the negative Z-axis side of the main body 21. The cover 22 closes the opening on the negative Z-axis side of the main body 21, and constitutes the end of the housing 20 on the negative Z-axis side. The cover 22 is fixed to the main body 21 by a fixing member such as a screw 99.

A first insertion opening 22a and a second insertion opening 22b are formed in the central portion of the cover 22.

As shown in Figures 2 and 4, the first insertion opening 22a is a recess into which the first power supply terminal 123a of the holder 120 described later is inserted, forming a circular opening surface in a plan view. The opening surface of the first insertion opening 22a is perpendicular to the central axis O.

The second insertion opening 22b is an annular groove into which the second power supply terminal 123b of the holder 120 described later is inserted, forming a circular opening surface in a plan view. The second insertion opening 22b is formed around (surrounding) the first insertion opening 22a, and is formed concentrically with the first insertion opening 22a. The second insertion opening 22b is an example of a first engagement portion.

The depth direction of the first insertion opening 22a and the second insertion opening 22b, and the attachment/detachment direction of the first power supply terminal 123a and the second power supply terminal 123b are approximately parallel to the Z-axis direction.

Figure 5 is a plan view of the adapter 10 in the embodiment, and a partially enlarged view showing a pair of elastic claws 22d and protrusions 22c of the adapter 10. Figure 6A is a cross-sectional view of the adapter 10 taken along line VIA-VIA in Figure 5. Figure 6B is a cross-sectional view of the adapter 10 taken along line VIB-VIB in Figure 5.

As shown in FIG. 5, the second insertion opening 22b has a protrusion 22c and a pair of elastic claws 22d.

As shown in Figs. 5 and 6A, the protrusions 22c are formed inside (on the inner peripheral side surface) of the recessed portion of the second insertion opening 22b, narrowing the gap of the recessed portion. Therefore, when the second power supply terminal 123b is inserted into the second insertion opening 22b, the protrusions 22c come into contact with the second power supply terminal 123b (contact with the second power supply terminal 123b as if sandwiching it) so as to support (or hold) the second power supply terminal 123b. Specifically, the protrusions 22c are tapered to gradually narrow the gap of the opening of the second power supply part 70b in the insertion direction in which the second power supply terminal 123b is inserted into the second power supply part 70b. Preferably, the interval of the second insertion opening 22b where the protrusions 22c are formed is equal to the thickness of the second power supply terminal 123b.

The protrusion 22c is integrally formed with the second insertion opening 22b, but may be a member such as a packing attached to the inner circumferential side surface of the recessed portion of the second insertion opening 22b. In other words, a member such as a packing may be attached to the inner circumferential side surface of the recessed portion of the second insertion opening 22b as the protrusion 22c. A member such as a packing may also be disposed around the entire circumference of the inner circumferential side surface of the recessed portion of the second insertion opening 22b, and is not limited to this embodiment.

5, when the adapter 10 is viewed from above so as to face the connector portion 70, the protrusion 22c is disposed on a straight line V2 that passes through the first power supply portion 70a and is perpendicular (similar to approximately perpendicular) to a straight line V1 that connects the pair of locking portions, the first locking portion 31 and the second locking portion 32. In other words, the protrusion 22c is disposed at a position that suppresses the swing of the lighting device 100 even if the lighting device 100 swings relative to the adapter 10 with the first locking portion 31 and the second locking portion 32 as a fulcrum. In this embodiment, the protrusion 22c is disposed on both sides of the pair of elastic claw portions 22d so as to sandwich the pair of elastic claw portions 22d, but may be disposed over a plurality of locations, or may be disposed over the entire circumference of the inner circumferential side surface of the recessed portion of the second insertion opening portion 22b, and is not limited to this embodiment.

As shown in Figs. 5 and 6B, each of the pair of elastic claws 22d is a long engagement portion that extends in the Z-axis direction and engages with the second power supply terminal 123b, and has claws 22d1 that protrude from the tip (end portion on the Z-axis negative direction side) so as to face each other. The pair of elastic claws 22d is elastically deformable and engages with the second power supply terminal 123b. The pair of elastic claws 22d is provided on the second power supply section 70b so as to sandwich the second power supply terminal 123b. When the second power supply terminal 123b is inserted into the second insertion port 22b, the pair of elastic claws 22d are elastically deformed so as to move away from each other by the second power supply terminal 123b, as shown by the two-dot chain line in Fig. 6B, so that each claw 22d1 sandwiches the second power supply terminal 123b. When the second power supply terminal 123b moves away from the second insertion port 22b, the pair of elastic claws 22d are in the state shown by the solid line in Fig. 6B. The pair of elastic claws 22d is an example of a second engagement portion. The shortest distance between the pair of elastic claws 22d only needs to be equal to the thickness of the second insertion opening 22b, and the pair of elastic claws 22d do not need to be elastically deformed even when the second power supply terminal 123b is inserted into the second insertion opening 22b. In other words, each of the pair of elastic claws 22d may simply be in contact with the second power supply terminal 123b. In addition, although a pair of elastic claws 22d is used in this embodiment, there may be one elastic claw 22d, or three or more elastic claws.

In addition, the tip sides of the pair of elastic claws 22d gradually narrow the gap between the pair of elastic claws 22d in the insertion direction in which the second power supply terminal 123b is inserted into the second power supply part 70b.

When the adapter 10 is viewed from above so as to face the connector portion 70, the pair of elastic claws 22d are arranged on a straight line V2 that passes through the first power supply portion 70a and is perpendicular to the straight line V1 that connects the first locking portion 31 and the second locking portion 32. In other words, the pair of elastic claws 22d are arranged in a position that suppresses the swing of the lighting device 100 even if the lighting device 100 swings relative to the adapter 10 with the first locking portion 31 and the second locking portion 32 as a fulcrum. In this embodiment, the pair of elastic claws 22d are arranged adjacent to the protrusion portion 22c, but they may be arranged over multiple locations or may be arranged over the entire circumference of the inner side surface of the recessed portion in the second insertion opening portion 22b, and are not limited to this embodiment.

[First locking portion 31 and second locking portion 32]
As shown in Fig. 3 and Fig. 4, the first locking portion 31 and the second locking portion 32 are resin members for the adapter 10 to hold the lighting device 100 in a predetermined position. In other words, the first locking portion 31 and the second locking portion 32 are members for locking the lighting device 100 to the adapter 10. The first locking portion 31 and the second locking portion 32 protrude from the outer peripheral surface 10c of the adapter 10 so as to be able to move forward and backward, thereby fixing the lighting device 100 to the adapter 10. The first locking portion 31 and the second locking portion 32 move along the Y-axis direction so as to be synchronized with each other. In this embodiment, two locking portions are used, but the number of locking portions may be three or more, or may be one.

The first locking portion 31 is biased from the inside to the outside of the housing 20 by the elastic member 40, and protrudes from the first opening 21c of the main body 21 toward the outside of the main body 21. The second locking portion 32 is biased from the inside to the outside of the housing 20 by the elastic member 40, and protrudes from the second opening 21d of the main body 21 toward the outside of the main body 21.

Each of the first locking portion 31 and the second locking portion 32 has a locking body 33 and an engagement protrusion 34.

Each locking body 33 is provided in the first opening 21c and the second opening 21d of the main body 21, and a portion of the locking body 33 protrudes from the outer peripheral surface 10c of the main body 21. The locking body 33 and the engagement protrusion 34 are formed integrally.

The locking body 33 of the first locking portion 31 is partially exposed from one of the pair of cutout portions 21h, and the locking body 33 of the second locking portion 32 is partially exposed from the other of the pair of cutout portions 21h.

As shown in FIG. 1, each locking body 33 has a protrusion 33a protruding from the upper surface (the surface on the positive side of the Z axis). The protrusions 33a are disposed in the pair of notches 21h, respectively, and protrude in the positive direction of the Z axis. For example, when only the adapter 10 is attached to the holder 120 of the lighting fixture 100, the user moves the first locking portion 31 and the second locking portion 32 inside the housing 20 (they are stored) while pinching the protrusion 33a or while pinching each locking body 33 through the pair of notches 21h. This allows the adapter 10 to be removed from the holder 120 of the lighting fixture 100.

As shown in Figures 3 and 4, each locking body 33 is a rectangular plate-like shape that is flat in the Z-axis direction. The protruding portion of the locking body 33 that protrudes from the outer peripheral surface 10c of the main body 21 is an arc shape that follows the shape of the outer peripheral surface 10c of the main body 21. The protruding portion of each locking body 33 also forms part of the outer peripheral surface 10c of the adapter 10. The protruding portion of each locking body 33 engages with the holder 120 to become a part that fixes the lighting fixture 100 to the adapter 10. The protruding portion of each locking body 33 is formed in a stepped shape.

Specifically, each locking body 33 has a fixing portion 35 and a temporary fastening portion 36 formed on the protruding portion of the locking body 33.

Figure 7 is a plan view that shows the amount of protrusion of the first locking portion 31 and the second locking portion 32 from the outer peripheral surface 10c of the adapter 10.

4 and 7, the fixing portion 35 fixes the lighting device 100 to the adapter 10 by engaging the locked portion 122b of the holder 120 of the lighting device 100. In this case, when the lighting device 100 is fixed to the adapter 10, each of the first locking portion 31 and the second locking portion 32 is in a first state in which it protrudes by a first amount A1 from the outer peripheral surface 10c of the adapter 10. Here, the first state means a normally attached state in which the adapter 10 is inserted and fixed in the holder 120 of the lighting device 100. The normally attached state is a state in which the movement of the lighting device 100 is restricted even if the lighting device 100 is moved in the Z-axis direction (a state in which the first abutment surface 35a of the fixing portion 35 abuts against the abutment surface 122a1 of the locked portion 122b), and a state in which the third terminal 53 and the fourth terminal 54 are connected to the connector portion 70.

As shown in Figures 3 and 4, the fixing portion 35 is an arc-shaped portion that protrudes from the outer peripheral surface 10c of the main body portion 21 along the outer peripheral surface 10c of the main body portion 21. When the adapter 10 is viewed from the side, the fixing portion 35 protrudes radially outward from the side wall portion 21a of the main body portion 21. The fixing portion 35 is part of the protruding portion of the locking body 33. In addition, the end face in the protruding direction of the locking body 33 between the fixing portion 35 and the temporary fastening portion 36 constitutes part of the outer peripheral surface 10c of the adapter 10, and is sometimes referred to as the outer peripheral surface 37 of the fixing portion 35 or the outer peripheral surface 37 of the locking body 33.

When the adapter 10 is viewed from the side, the fixing portion 35 is formed in a stepped shape with respect to the surface 10a of the main body portion 21. The fixing portion 35 is formed with a first abutment surface 35a that is lower than the surface 10a of the main body portion 21. The first abutment surface 35a is a surface that abuts against the locked portion 122b when the first locking portion 31 and the second locking portion 32 lock the locked portion 122b of the holder 120 in the first state. Specifically, in the first state, the fixing portion 35 locks the locked portion 122b of the holder 120 by abutting the first abutment surface 35a against the locked portion 122b of the holder 120 in a state facing the locked portion 122b of the holder 120.

Also, as shown in Figures 4 and 7, in the first state, the diameter of a circle S1 including the outer circumferential surface 37 of the fixing portion 35 is larger than the diameter of a circle S2 of the outer circumferential surface 10c of the main body portion 21.

The temporary fastening portion 36 engages with the locked portion 122b to temporarily fasten the lighting device 100 to the adapter 10. In this case, when the lighting device 100 is temporarily fastened to the adapter 10, each of the first locking portion 31 and the second locking portion 32 is in a second state in which it protrudes from the outer peripheral surface 10c of the adapter 10 by a second amount A2, which is smaller than the first amount A1. In the second state, the diameter of the outermost circle S3 of the adapter 10 at the second amount A2 is larger than the diameter of the outermost circumference of the adapter 10 at the first amount A1. Here, the second state means a state in which the adapter 10 is inserted into the holder 120 of the lighting device 100 and temporarily fastened, and the second abutment surface 36a of the temporary fastening portion 36 abuts against the abutment surface 122a1 of the locked portion 122b. In other words, the second state does not fix the lighting device 100 to the adapter 10 as firmly as the first state. For example, when the temporary fastening portion 36 engages with the locked portion 122b, the lighting fixture 100 is supported by the adapter 10, but when the lighting fixture 100 is pulled down in the negative Z-axis direction in an attempt to move it in the Z-axis direction, the lighting fixture 100 may be allowed to move.

As shown in Figures 3 and 4, the temporary fastening portion 36 is an arc-shaped portion that protrudes from the outer peripheral surface 10c of the main body portion 21 along the shape of the outer peripheral surface 10c of the main body portion 21. The temporary fastening portion 36 is part of the protruding portion of the locking body 33.

When the adapter 10 is viewed from the side, the temporary fastening portion 36 is formed in a stepped shape with respect to the first abutment surface 35a of the fixed portion 35, and protrudes radially outward from the side wall portion 21a of the main body portion 21 further than the fixed portion 35. The temporary fastening portion 36 is formed with a second abutment surface 36a that is lower (negative Z-axis direction side) than the first abutment surface 35a of the fixed portion 35. In other words, the temporary fastening portion 36 and the fixed portion 35 form a stepped configuration in the protruding portion of the locking main body 33.

As shown in Figures 4 and 7, the diameter of a circle S1 including the outermost edge of each of the temporary fastening portions 36 of the first fastening portion 31 and the second fastening portion 32 is larger than the diameter of a circle S2 of the outer circumferential surface 10c of the main body portion 21, and is larger than the diameter of a circle S4 including the outer circumferential surface 37 of each of the fastening bodies 33 of the first fastening portion 31 and the second fastening portion 32.

3 and 4, the second abutment surface 36a is a surface that abuts against the locked portion 122b when the first locking portion 31 and the second locking portion 32 engage with the locked portion 122b in the second state. In other words, the second abutment surface 36a is a surface that abuts against the locked portion 122b when the lighting device 100 is temporarily fastened to the adapter 10. Specifically, in the second state, the temporary fastening portion 36 abuts against the locked portion 122b of the holder 120 while facing the locked portion 122b of the holder 120, thereby engaging with the locked portion 122b of the holder 120. The second abutment surface 36a is an example of an abutment surface of the temporary fastening portion 36.

As shown in Figs. 4 and 8, the second abutment surface 36a is inclined downward in a direction away from the outer peripheral surface 10c of the adapter 10 (radial direction relative to the central axis O) with respect to an imaginary plane W0 perpendicular to the attachment/detachment direction of the adapter 10 to the ceiling hook 3 in Fig. 1. In other words, the distance of the second abutment surface 36a from the imaginary plane W0 increases as it moves away from the outer peripheral surface 10c. The second abutment surface 36a is an inclined surface of the temporary fastening portion 36 that is inclined downward in a direction away from the central axis O of the adapter 10, which is approximately parallel to the Z-axis direction, and forms an inclined surface that is curved with respect to the X-Y plane. In other words, the second abutment surface 36a is an example of an inclined surface of the temporary fastening portion 36. The extension surface including the second abutment surface 36a is inclined with respect to the first abutment surface 35a and is also inclined with respect to the surface 10a of the main body portion 21.

More specifically, the second abutment surface 36a has a first inclined surface 36a1 and a pair of second inclined surfaces 36a2.

The first inclined surface 36a1 is inclined downward with respect to the imaginary plane W0 in a direction away from the outer peripheral surface 10c of the adapter 10. Each of the pair of second inclined surfaces 36a2 is arranged on both sides of the first inclined surface 36a1. That is, the pair of second inclined surfaces 36a2 are arranged so as to sandwich the first inclined surface 36a1. Each of the pair of second inclined surfaces 36a2 is also inclined downward with respect to the imaginary plane W0 in a direction away from the outer peripheral surface 10c of the adapter 10. The second inclined surface 36a2 is an inclined surface at an angle different from that of the first inclined surface 36a1 with respect to the imaginary plane W0. The angle θ1 of the first inclined surface 36a1 with respect to the imaginary plane W0 is larger than the angle of the second inclined surface 36a2 with respect to the imaginary plane W0. The angle θ1 of the first inclined surface 36a1 is the angle between the straight line W1 parallel to the first inclined surface 36a1 and the imaginary plane W0 when the adapter 10 is viewed from the side, as shown in FIG. As shown in Figure 9, the angle θ2 of the second inclined surface 36a2 is the angle between a line W2 parallel to the second inclined surface 36a2 and an imaginary plane W0 when the adapter 10 is viewed from the front. Figure 8 is a side view showing the second locking portion 32 as viewed from the side. Figure 9 is a side view showing the second locking portion 32 as viewed from the front.

The angles θ1 and θ2 can be changed as appropriate to set the holding force of the engaged portion 122b against the first inclined surface 36a1 and the second inclined surface 36a2.

In the locking body 33, when the adapter 10 is cut on a plane that includes the central axis O of the adapter 10 and is parallel to the attachment/detachment direction of the adapter 10 relative to the hook-on ceiling 3, the first angle formed by the first abutment surface 35a of the fixing part 35 and the outer peripheral surface 10c of the adapter 10 parallel to the attachment/detachment direction (Z-axis direction) of the adapter 10 relative to the hook-on ceiling 3 is smaller than the second angle formed by the second abutment surface 36a of the temporary fastening part 36 and the outer peripheral surface 10c of the adapter 10 parallel to the attachment/detachment direction of the adapter 10 relative to the hook-on ceiling 3. In other words, the second angle formed by the outer peripheral surface 37 of the locking body 33 (or the fixing part 35) and the second abutment surface 36a is larger than the first angle formed by the first abutment surface 35a and the outer peripheral surface 37 of the locking body 33 (or the fixing part 35). In other words, in the locking body 33, when the first locking portion 31 and the second locking portion 32 lock the locked portion 122b of the lighting device 100 in the first state, the locking force in the removal direction (Z-axis minus direction) when the first locking portion 31 and the second locking portion 32 lock the locked portion 122b in the first state at the fixing portion 35 that forms a first angle is greater than the locking force in the removal direction when the first locking portion 31 and the second locking portion 32 engage with the locked portion 122b in the second state at the temporary fastening portion 36 that forms a second angle with the outer peripheral surface 37 of the locking body 33. Therefore, in the second state, it is easier to remove the lighting device 100 from the adapter 10 than in the first state.

3 and 4, the engagement protrusion 34 is formed integrally with the locking body 33 and extends from the locking body 33. Specifically, the engagement protrusion 34 protrudes from the edge of the locking body 33 opposite the protruding portion of the locking body 33 in the direction of the central axis O of the adapter 10 (the radial center of the main body 21).

An elastic member 40 is attached to the engagement protrusion 34. When the engagement protrusion 34 engages with the end of the elastic member 40, the engagement protrusion 34, together with the locking body 33, is biased radially outward from the side wall portion 21a of the main body portion 21 by the elastic member 40. The radially outward direction is the direction away from the radial center of the main body portion 21.

[Elastic member 40]
In this embodiment, the elastic member 40 is a torsion spring, but may be another elastic member. The elastic member 40 biases the first locking portion 31 and the second locking portion 32 radially outwardly of the side wall portion 21a of the main body portion 21. The elastic member 40 allows the first locking portion 31 and the second locking portion 32 to protrude freely toward and away from the side wall portion 21a (outer peripheral surface 10c) of the main body portion 21.

In this embodiment, the elastic member 40 moves the first locking portion 31 along the negative Y-axis direction and moves the second locking portion 32 along the positive Y-axis direction.

[First terminal 51 and second terminal 52]
The first terminal 51 and the second terminal 52 are detachably fixed to the ceiling hook 3 in Fig. 1 which is electrically connected to a wiring to which power is supplied. The first terminal 51 and the second terminal 52 are metal plate-shaped members, and are a pair of terminals through which the lighting device 100 receives power supply from the ceiling hook 3. The first terminal 51 and the second terminal 52 are fixed to the inner bottom 21b of the main body 21 by a fixing member such as a screw. Note that, although two terminals, the first terminal 51 and the second terminal 52, are exemplified in this embodiment, the adapter 10 may have three or more terminals.

One end (L-shaped portion) of the first terminal 51 is inserted into the power supply port 3a of the ceiling hook 3, and one end of the second terminal 52 is also inserted into the power supply port 3a of the ceiling hook 3, so that the first terminal 51 and the second terminal 52 are electrically connected to a pair of power supply terminals (not shown) in the ceiling hook 3. The lighting fixture 100 receives, for example, AC power from the ceiling hook 3, but may also receive DC power.

As shown in FIG. 3, one end of the first terminal 51 and one end of the second terminal 52 are hook blades 51a, 52a that protrude from the surface 10a of the main body 21. The hook blades 51a, 52a, which are the protruding parts of the first terminal 51 and the second terminal 52, are formed in an L-shape in a side view, forming a claw shape.

As shown in Figs. 1 and 3, the hook blade 51a of the first terminal 51 is inserted into the power feed port 3a of the ceiling hook 3, and the hook blade 52a of the second terminal 52 is also inserted into the power feed port 3a of the ceiling hook 3, so that the adapter 10 is mechanically connected to the ceiling hook 3. When the hook blade 51a of the first terminal 51 is inserted into the power feed port 3a of the ceiling hook 3, and the hook blade 52a of the second terminal 52 is inserted into the power feed port 3a of the ceiling hook 3, the first terminal 51, the second terminal 52, and the locking portion 80 are hooked onto the ceiling hook 3, preventing it from rotating.

3 and 4, the other end of the first terminal 51 is electrically and mechanically connected to one end of the third terminal 53 and is housed in the main body 21. The other end of the second terminal 52 is electrically and mechanically connected to one end of the fourth terminal 54 and is housed in the main body 21.

[Third terminal 53 and fourth terminal 54]
The third terminal 53 and the fourth terminal 54 are plate-shaped metal members, and are a pair of terminals for the lighting device 100 to receive power from the ceiling hook 3 of Fig. 1. One end of the third terminal 53 is electrically and mechanically connected to the other end of the first terminal 51. Also, one end of the fourth terminal 54 is electrically and mechanically connected to the other end of the second terminal 52. The third terminal 53 is pressed and fixed to the inner bottom 21b by the first terminal 51 being fixed to the inner bottom 21b of the main body 21 by a fixing member such as a screw. Also, the fourth terminal 54 is pressed and fixed to the inner bottom 21b by the second terminal 52 being fixed to the inner bottom 21b of the main body 21 by a fixing member such as a screw.

In this embodiment, one end of the third terminal 53 and one end of the fourth terminal 54 are bifurcated terminals that sandwich the other end of the first terminal 51 and the other end of the second terminal 52.

The other end 53a of the third terminal 53 is disposed within the first insertion opening 22a. The other end 54a of the fourth terminal 54 is disposed within the second insertion opening 22b. The other end 53a of the third terminal 53 extends in the Z-axis direction so as to be electrically connected to the first power supply terminal 123a, and is a bifurcated terminal that sandwiches the first power supply terminal 123a. The other end 54a of the fourth terminal 54 extends in the Z-axis direction so as to be electrically connected to the second power supply terminal 123b, and is a bifurcated terminal that sandwiches the second power supply terminal 123b. The other end 53a of the third terminal 53 and the other end 54a of the fourth terminal 54 accept the insertion of the first power supply terminal 123a and the second power supply terminal 123b in the positive direction of the Z-axis.

The first terminal 51 and the third terminal 53 may be integrated into a single member, and the second terminal 52 and the fourth terminal 54 may be integrated into a single member.

[Connector portion 70]
The connector portion 70 is provided on the back surface 10b opposite to the front surface 10a on which the first terminal 51 and the second terminal 52 are provided in the adapter 10, and is electrically connected to the ceiling hook 3 in Figure 1 via the first terminal 51 and the second terminal 52, thereby supplying power to the lighting fixture 100.

Specifically, the connector portion 70 is composed of the other end 53a of the third terminal 53 arranged on the positive side of the Z axis from the first insertion opening 22a so as to be electrically connected to the first power supply terminal 123a of the holder 120, the other end 54a of the fourth terminal 54 arranged on the positive side of the Z axis from the second insertion opening 22b so as to be electrically connected to the second power supply terminal 123b of the holder 120, the first insertion opening 22a and the second insertion opening 22b.

More specifically, the connector portion 70 has a first power supply portion 70a and a second power supply portion 70b.

The first power supply part 70a is a concave power supply part into which the first power supply terminal 123a is inserted. The first power supply part 70a has a first connection terminal 50a that is electrically connected to the first power supply terminal 123a provided on the lighting device 100. In this embodiment, the first power supply part 70a is composed of a first insertion opening part 22a formed in the center part of the cover 22 and a first connection terminal 50a that is electrically connected to the first power supply terminal 123a of the holder 120 that is inserted into the first insertion opening part 22a.

The second power supply part 70b is a concave power supply part into which the second power supply terminal 123b is inserted. The second power supply part 70b is formed to surround the periphery of the first connection terminal 50a, and has a second insertion opening part 22b that engages with the second power supply terminal 123b, and a second connection terminal 50b that is electrically connected to the second power supply terminal 123b engaged with the second insertion opening part 22b. In this embodiment, the second power supply part 70b is composed of the second power supply terminal 123b formed in the center part of the cover 22, and the second connection terminal 50b that is electrically connected to the second power supply terminal 123b. The first power supply part 70a and the second power supply part 70b have shapes corresponding to the first power supply terminal 123a and the second power supply terminal 123b.

The connector portion 70 is provided so as to be detachable from the first power supply terminal 123a and the second power supply terminal 123b, which are the connected portion 123 of the lighting fixture 100. The connector portion 70 is electrically connected to the connected portion 123 of the lighting fixture 100 in the first state, and is electrically disconnected from the connected portion 123 of the lighting fixture 100 in the second state. Here, the connected portion 123 is composed of the first power supply terminal 123a and the second power supply terminal 123b.

[Lock portion 80]
The locking portion 80 (1) protrudes from the front surface 10a and is inserted into the power supply port 3a provided on the surface of the hook-on ceiling 3 when the housing 20 is attached to the hook-on ceiling 3 in a predetermined positional relationship, and (2) is pressed by the surface of the hook-on ceiling 3 when the housing 20 is attached to the hook-on ceiling 3 without being in the predetermined positional relationship. In other words, the locking portion 80 is a member for restricting the movement of the adapter 10 relative to the hook-on ceiling 3 in order to maintain the first state in which the adapter 10 is fixed to the hook-on ceiling 3 in Fig. 1. Such a locking portion 80 is formed from a resin material.

The locking portion 80 includes an extension portion 81, a coil spring (not shown), a spring hole into which the coil spring is inserted, and a guide portion 82.

The extension 81 protrudes from an opening on the surface 10a of the main body 21 and is inserted into the power supply port 3a on the ceiling hook 3 in FIG. 1, thereby restricting the movement of the adapter 10 relative to the ceiling hook 3.

One end of the coil spring abuts against the bottom 21b in the spring hole, and the other end abuts against the inner surface of the cover 22, biasing the locking portion 80 in the positive direction of the Z axis.

The guide portion 82 is a groove that guides the pin 91 of the unlock button 90 (described later) so that it can slide freely. The guide portion 82 forms a groove that is inclined in the direction in which the unlock button 90 is pressed, which is the direction in which the pin 91 moves.

As shown in Figs. 1 and 10, for example, when the adapter 10 is rotated and the position of the extension 81 overlaps with the power supply port 3a of the ceiling-mounted hook 3, the extension 81 protrudes further from the opening provided in the surface 10a of the main body 21 due to the biasing force of the coil spring and is inserted into the power supply port 3a of the ceiling-mounted hook 3. This restricts the rotation of the adapter 10 relative to the ceiling-mounted hook 3, and locks the rotation of the adapter 10 relative to the ceiling-mounted hook 3. Fig. 10 is a cross-sectional view of the adapter 10 taken along line X-X in Fig. 5. The ceiling-mounted hook 3 is omitted in Fig. 10.

[Unlock button 90]
3 and 10, the unlock button 90 is a button that is pressed to pull out the extension 81 from the power supply port 3a of the ceiling-mounted hook 3, and is a button provided on the side wall 21a of the main body 21. When the locking portion 80 is pressed by the surface of the ceiling-mounted hook 3, the unlock button 90 is displaced to a position that prevents electrical connection of the second power supply terminal 123b to the second power supply portion 70b. The unlock button 90 is a resin member, a part of which is exposed to the outside from the main body 21 through a notch 21f provided in the side wall 21a of the main body 21.

The unlock button 90 has a pin 91 that slides relative to the locking section 80, and a restricting section 92 that prevents electrical connection of the second power supply terminal 123b to the second power supply section 70b when the unlock button 90 is pressed in. The pin 91 moves freely sliding along the guide section 82 when the unlock button 90 is pressed into the inside of the main body 21 and engages with the guide section 82 of the locking section 80. The restricting section 92 is disposed inside the recessed section of the second power supply section 70b into which the second power supply terminal 123b is inserted, so that the restricting section 92 is displaced to a position that prevents electrical connection of the second power supply terminal 123b to the second power supply section 70b when the locking section 80 is pressed by the surface of the ceiling hook 3.

For example, when the unlock button 90 moves in the direction in which it is pressed, the pin 91 pushes the inner wall of the guide portion 82 in the negative Z-axis direction, thereby moving the lock portion 80 in the negative Z-axis direction. As a result, the extension portion 81 is pulled out of the power supply port 3a of the ceiling-mounted hook 3 against the biasing force of the coil spring. This releases the restriction on the rotation of the adapter 10 relative to the ceiling-mounted hook 3. While pressing the unlock button 90, it becomes possible to rotate the adapter 10 relative to the ceiling-mounted hook 3, and the adapter 10 can be removed from the ceiling-mounted hook 3.

On the other hand, for example, when the adapter 10 is attached to the ceiling hook 3, the guide portion 82 is always pressed by the ceiling hook 3 from the time when the hook blade 51a of the first terminal 51 and the hook blade 52a of the second terminal 52 are inserted into the power supply port 3a until the rotation is completed and the hook blade 51a and the hook blade 52a reach the end of the power supply port 3a. In other words, after the start of the installation work, the guide portion 82 can only protrude from the housing 20 when the adapter 10 is completely attached to the ceiling hook 3. In other words, when the amount of rotation of the adapter 10 relative to the ceiling hook 3 is insufficient and the adapter 10 is not completely attached to the ceiling hook 3 (also called an incomplete installation state), the guide portion 82 does not protrude, and in conjunction with this, the unlock button 90 remains pressed in (positioned inside the housing 20).

Utilizing this, a restricting portion 92 is disposed inside the recessed portion of the second power supply portion 70b into which the second power supply terminal 123b is inserted, and the restricting portion 92 prevents the second power supply terminal 123b from being electrically connected to the second power supply portion 70b. For this reason, the restricting portion 92 provided on the unlocking button 90 of the adapter 10 prevents the lighting device 100 from being attached to the adapter 10 in an incomplete attachment state. Specifically, while the unlocking button 90 is pressed in, as shown in Figs. 11 and 12, the restricting portion 92 is disposed inside the recessed portion of the second insertion opening 22b so as to be exposed from the second insertion opening 22b. In other words, in an incomplete attachment state, the second power supply terminal 123b comes into contact with the restricting portion 92, preventing the second power supply terminal 123b from entering the second insertion opening 22b, and therefore the lighting device 100 cannot be attached to the adapter 10. This prevents the lighting device 100 from falling off together with the adapter 10 when the lighting device 100 is attached to the adapter 10 in an incomplete attachment state. Figure 11 is a plan view of the adapter 10 in the embodiment, showing the unlock button 90 in a pressed state. Figure 12 is a plan view of the adapter 10 taken along line XII-XII in Figure 11, showing the unlock button 90 in a pressed state.

<Lighting fixture 100>
1 and 2 , lighting fixture 100 includes fixture body 110 that houses light source 130, holder 120 to which adapter 10 is detachably attached, light source 130, diffusion cover 140, and power supply unit 150. In the present embodiment, lighting fixture 100 is a cylindrical fixture with a bottom that is circular in a plan view and flattened in the Z-axis direction.

[Instrument body 110]
The fixture body 110 is made of, for example, a metal mainly composed of aluminum or iron, or a resin, and constitutes a housing that houses the holder 120, the light source 130, the power supply unit 150, etc. The fixture body 110 functions as a heat sink that dissipates heat generated from the light source 130 and the power supply unit 150.

The fixture body 110 also houses the holder 120, the power supply unit 150, etc., and has a container-shaped storage section 111 with an open edge on the negative Z-axis side, and a brim-shaped flange section 112 that extends radially from the edge on the negative Z-axis side of the storage section 111 about the central axis O of the lighting fixture 100.

The storage unit 111 is a container having a circular shape in a plan view. An opening 113 for fixing the holder 120 is formed in the center of the storage unit 111. The opening 113 is an insertion hole into which the adapter 10 is inserted, which supplies input power, such as commercial power from the outside, to the power supply unit 150. The adapter 10 is inserted into the opening 113 by fixing the holder 120, which covers the opening 113 of the storage unit 111, with a fixing member such as a screw.

The flange 112 has a circular ring shape extending radially from the edge of the housing 111 on the negative Z-axis side. The light source 130 is fixed to the surface of the flange 112 on the negative Z-axis side with a fixing member such as a screw. A diffusion cover 140 is fixed to the outer peripheral edge of the flange 112 so as to cover the light source 130.

[Holder 120]
The holder 120 is a cylindrical container with a bottom that is flattened in the Z-axis direction and that houses the adaptor 10. The holder 120 has a circular shape in a plan view. The holder 120 is made of, for example, a resin material having insulating properties.

The holder 120 has a cylindrical outer wall portion 121 in which an insertion port 122a is formed, which opens the end on the positive side of the Z axis, a bottom portion 122 that closes the end of the outer wall portion 121 on the negative side of the Z axis, a first power supply terminal 123a, and a second power supply terminal 123b.

The outer peripheral wall portion 121 is fixed to the housing portion 111 of the instrument body 110 so that the central axis O of the outer peripheral wall portion 121 approximately coincides with the central axis O of the adapter 10. Specifically, the outer peripheral wall portion 121 has a brim-shaped fixing piece 121a that protrudes radially outward from the edge on the positive side of the Z axis. With the outer peripheral wall portion 121 inserted into the opening 113 of the housing portion 111 so that the central axis O of the outer peripheral wall portion 121 approximately coincides with the central axis O of the opening 113 of the housing portion 111, the fixing piece 121a is fixed with a fixing member such as a screw.

A third convex portion 125 is formed on the inner surface of the outer wall portion 121.

When the holder 120 (lighting device 100) is rotated circumferentially around the central axis O relative to the adapter 10, the third protrusion 125 comes into contact with the first locking portion 31 and the second locking portion 32 of the adapter 10, thereby changing the amount of protrusion of the first locking portion 31 and the second locking portion 32 relative to the outer peripheral surface 10c of the adapter 10.

The third convex portion 125 is a convex structure that exerts a biasing force that moves the first locking portion 31 and the second locking portion 32 in the direction of the central axis O of the adapter 10. More specifically, the third convex portion 125 is a convex structure that protrudes from a part of the inner peripheral surface of the outer peripheral wall portion 121 along the central axis O of the outer peripheral wall portion 121. The third convex portion 125 has a protruding amount sufficient to move the first locking portion 31 and the second locking portion 32 in the direction of the central axis O of the adapter 10 by abutting against the first locking portion 31 and the second locking portion 32 of the adapter 10 when the holder 120 rotates around the central axis O of the adapter 10. More specifically, the third protrusion 125 has a protruding amount sufficient to release the engagement between the fixed portion 35 of each of the first and second locking portions 31 and 32 and the locked portion 122b, but does not protrude enough to release the engagement between the temporary fastening portion 36 of each of the first and second locking portions 31 and 32 and the locked portion 122b.

The outer wall portion 121 has an engaging portion 122b that protrudes from the edge on the positive Z-axis side toward the inner circumference, that is, so as to narrow the opening area of the insertion opening 122a of the outer wall portion 121.

When the lighting device 100 is in a first state in which it is normally fixed to the adapter 10, the engaged portion 122b abuts against the fixed portion 35 of the engaging body 33 in each of the first engaging portion 31 and the second engaging portion 32. More specifically, when in the first state, the abutment surface 122b1, which is the surface of the engaged portion 122b on the negative Z-axis direction side (the surface facing the fixed portion 35), abuts against the first abutment surface 35a of the fixed portion 35.

In addition, when the lighting device 100 is in the second state in which it is temporarily fixed to the adapter 10, the locked portion 122b abuts against the temporary fastening portion 36 of the locking body 33 in each of the first locking portion 31 and the second locking portion 32. More specifically, in the second state, the abutment surface 122b1, which is the surface of the locked portion 122b on the negative Z-axis direction side (the surface facing the temporary fastening portion 36), abuts against or faces the second abutment surface 36a of the temporary fastening portion 36.

A first protrusion 124 is formed on the surface of the engaged portion 122b on the positive Z-axis direction side. When the holder 120 (lighting device 100) is rotated in the circumferential direction around the central axis O relative to the adapter 10, the first protrusion 124 engages with the second protrusion 21e of the adapter 10, thereby transitioning the state of the adapter 10 fixed to the lighting device 100 to a temporary fixed state.

The first convex portion 124 is a convex structure that exerts a biasing force that presses the lighting device 100 in the negative Z-axis direction via the holder 120. More specifically, the first convex portion 124 is a convex structure that is substantially triangular in front view, but is not limited to this. For example, the second convex portion 21e of the holder 120 that rotates around the central axis O of the adapter 10 rides up and exerts a biasing force that presses the lighting device 100 in the negative Z-axis direction via the holder 120, so it is sufficient that an inclined surface that slopes upward in the circumferential direction around the central axis O of the adapter 10 is formed.

The bottom 122 is a plate-shaped bottom plate that is approximately parallel to the XY plane and faces the rear surface 10b of the adapter 10. A first power supply terminal 123a and a second power supply terminal 123b are fixed to the center of the bottom 122.

[First power supply terminal 123a and second power supply terminal 123b]
The first power supply terminal 123a and the second power supply terminal 123b are electrically and mechanically connected to the lighting fixture 100.

The first power supply terminal 123a is a convex terminal (pillar-shaped terminal) extending in the attachment/detachment direction, and is a connection terminal for supplying power supplied from the ceiling hook 3 in FIG. 1 via the adapter 10, and is a male connector part. The first power supply terminal 123a is fixed to the bottom 122 of the holder 120 by a fixing member such as a screw so that the central axis O of the first power supply terminal 123a approximately coincides with the central axis O of the adapter 10 and the central axis O of the outer peripheral wall portion 121.

The second power supply terminal 123b is a convex terminal (cylindrical terminal) extending in the attachment/detachment direction, and is a connection terminal for supplying power supplied from the ceiling hook 3 through the adapter 10, and is a male connector part. The second power supply terminal 123b is formed around (surrounding) the first power supply terminal 123a and is formed concentrically with the first power supply terminal 123a. The second power supply terminal 123b is fixed to the bottom 122 of the holder 120 by a fixing member such as a screw so that the central axis of the second power supply terminal 123b approximately coincides with the central axis O of the adapter 10 and the central axis O of the outer wall portion 121. Note that the second power supply terminal 123b does not have to be cylindrical as long as it surrounds the first power supply terminal 123a. If the second power supply terminal 123b is concentric with the first power supply terminal 123a, the lighting fixture 100 can be rotated with respect to the adapter 10. Therefore, even if a force is applied to rotate the lighting fixture 100, excessive torque is unlikely to be applied to the lighting fixture 100, which can prevent damage to the components that make up the lighting fixture 100.

In other words, when the adapter 10 is inserted into the holder 120, the first power supply terminal 123a is inserted into the first insertion opening 22a of the cover 22, and the second power supply terminal 123b is inserted into the second insertion opening 22b of the cover 22.

In this embodiment, the first power supply terminal 123a is a cylindrical pin, and the second power supply terminal 123b is an annular (cylindrical) terminal.

[Light source 130]
2, the light source 130 is, for example, a light-emitting module that emits light, for example, a light-emitting module for lighting that brightens an entire room. The light source 130 is disposed on a mounting surface, which is a surface on the negative Z-axis direction side of the flange 112 of the fixture body 110, and is fixed to the fixture body 110 so as to irradiate light to the surroundings.

The light source 130 has a substrate 131 and a number of LED (Light Emitting Diode) modules 132.

The substrate 131 is a mounting substrate having a mounting surface for mounting the LED module 132. The substrate 131 is formed in a substantially circular plate shape. When viewed in the positive direction of the Z axis, the substrate 131 is fixed to the mounting surface of the flange 112 of the fixture body 110 by a fixing member such as a screw so as to cover the housing of the fixture body 110. Specifically, the substrate 131 is fixed to the fixture body 110 in a posture substantially parallel to the X-Y plane so that the mounting surface faces in the negative Z direction.

As the substrate 131, for example, a metal-based substrate obtained by applying an insulating coating to a base material made of a metal material such as aluminum or copper, a ceramic substrate which is a sintered body of a ceramic material such as alumina, or a resin substrate based on a resin material is used. The substrate 131 may be a printed wiring board, a rigid board, or a flexible board.

The LED modules 132 are arranged on the mounting surface of the substrate 131. The LED modules 132 are arranged in multiple annular rows by the substrate 131, that is, arranged concentrically. In this embodiment, the LED modules 132 are arranged in an internal region inside the annular power supply unit 150 and an external region on the outer periphery of the annular power supply unit 150, so as to sandwich the annular power supply unit 150 from the inside and outside. In other words, the LED modules 132 in the internal region and the LED modules 132 in the external region are arranged concentrically so as to sandwich the annular power supply unit 150.

The LED modules 132 are configured to emit, for example, white light. Specifically, the LED modules 132 are configured with COB (Chip On Board) type LED elements, and have a plurality of blue LEDs that are bare chips (LED chips) mounted on the substrate 131, and a sealing material that seals the blue LEDs and contains a yellow phosphor. The LED modules 132 may also emit light of two or more colors. Specifically, the LED modules 132 are three-color LED light sources of RGB, and may emit three monochromatic lights of red light, blue light, and green light, and may also emit colored light or white light obtained by dimming these three monochromatic lights.

The LED modules 132 may be surface mount device (SMD) type LED elements in which LEDs are packaged, and have a container (package), multiple LED chips mounted in the container, and a sealing member that seals the multiple LED chips. The sealing member is a translucent insulating resin material such as silicone resin. The sealing member may also contain a light diffusing material such as silica and a filler dispersed therein.

In this embodiment, the multiple LED modules 132 emit light in a direction approximately parallel to the negative Z-axis direction. Specifically, the optical axis of the multiple LED modules 132 is the main light emission direction, which is approximately parallel to the negative Z-axis direction.

[Diffusion cover 140]
The diffusion cover 140 is an optical member that covers the light source 130 when viewed in the negative Z-axis direction, and diffuses and emits light incident from the light source 130 to the outside. The diffusion cover 140 is supported by the fixture body 110 in a state spaced a predetermined distance from the light source 130. Specifically, the diffusion cover 140 has a circular shape when viewed from the Z-axis direction, and is supported by the outer circumferential edge of the flange portion 112 of the fixture body 110.

The diffusion cover 140 is translucent. For example, the diffusion cover 140 is formed of a translucent material such as acrylic resin. For example, the diffusion cover 140 may be a milky diffusion panel with a light diffusing material dispersed therein. Furthermore, the surface 10a of the diffusion cover 140 may be formed with fine irregularities (grain) by embossing or the like. As a result, the light emitted by the light source 130 and incident on the diffusion cover 140 is scattered by passing through the diffusion cover 140. This reduces the uneven brightness that appears on the diffusion cover 140 when viewed from the negative Z-axis direction.

[Power supply unit 150]
The power supply unit 150 is a power supply module having a lighting circuit that supplies power for lighting the light source 130. The power supply unit 150 converts AC current supplied from an external power source such as a commercial power source via the ceiling hook 3 and the adapter 10 into DC power of a predetermined level by rectifying, smoothing, stepping down, etc. The power supply unit 150 supplies the converted DC current to the light source 130 via lead wires, etc. The power supply unit 150 is combined with a dimmer circuit, a boost circuit, etc.

The power supply unit 150 is composed of, for example, a printed circuit board on which metal wiring of a predetermined shape is formed, and a number of circuit elements mounted on the printed circuit board. The circuit elements are electronic components for emitting light from the light source 130, and are, for example, capacitive elements (electrolytic capacitors, ceramic capacitors, etc.), resistive elements (resistors, etc.), rectifier circuit elements, coil elements, choke coils (choke transformers), integrated circuit elements (ICs), or semiconductor elements (FETs, etc.).

In this embodiment, the power supply unit 150 is accommodated in the accommodation section 111 of the device body 110, and is disposed between the light source 130 and the holder 120. The power supply unit 150 is disposed in a ring shape on the surface of the substrate 131 on the positive Z-axis direction side. The electronic components of the power supply unit 150 are mainly disposed on a first surface on the negative Z-axis direction side of the substrate 131, and the leaded components of the power supply unit 150 are mainly disposed on a second surface on the positive Z-axis direction side of the substrate 131. The electronic components are microcomputers, etc., and the leaded components are transformers, electrolytic capacitors, etc. The power supply unit 150 is fixed to the accommodation section 111 with fixing members such as screws.

<Operation>
First, the attachment of the adapter 10 to the ceiling hook receptacle 3 will be described.

As shown in FIG. 1, the hook blade 51a of the first terminal 51 and the hook blade 52a of the second terminal 52 of the adapter 10 are aligned with each power supply port 3a of the ceiling hook 3, and the hook blade 51a of the first terminal 51 and the hook blade 52a of the second terminal 52 are inserted into each power supply port 3a. The guide portion 82 is always pressed against the surface of the ceiling hook 3 and is housed inside the housing 20 until the hook blade 51a and the hook blade 52a reach the end of the power supply port 3a. The adapter 10 is rotated in the circumferential direction of the central axis O of the adapter 10 until the hook blade 51a and the hook blade 52a reach the end of the power supply port 3a. As a result, the adapter 10 is electrically and mechanically connected and fixed to the ceiling hook 3.

Next, we will explain how to attach the lighting fixture 100 to the adapter 10.

As shown in Figures 1, 2 and 4, the holder 120 of the lighting fixture 100 and the adapter 10 are aligned so that they overlap, and the lighting fixture 100 is pushed up so that the adapter 10 is inserted through the insertion opening 122a of the holder 120. At this time, the first locking portion 31 and the second locking portion 32 of the adapter 10 come into contact with and slide against the locked portion 122b of the holder 120, while the first locking portion 31 and the second locking portion 32 are pressed against the locked portion 122b, moving in the direction of the central axis O of the adapter 10. This allows the adapter 10 to be inserted through the insertion opening 122a of the holder 120 of the lighting fixture 100.

When the adapter 10 is inserted into the holder 120 of the lighting fixture 100, the first locking portion 31 and the second locking portion 32 move in the outer diameter direction of the adapter 10 due to the biasing force of the elastic member 40. The outer peripheral surface 37 of the locking body 33 of the first locking portion 31 and the outer peripheral surface 37 of the locking body 33 of the second locking portion 32 abut the inner peripheral surface of the locked portion 122b, and the second abutment surface 36a of the temporary fastening portion 36 of the first locking portion 31 and the second abutment surface 36a of the temporary fastening portion 36 of the second locking portion 32 abut the locked portion 122b. In other words, the locked portion 122b is in a second state in which it is temporarily fastened to the temporary fastening portion 36 of the first locking portion 31 and the temporary fastening portion 36 of the second locking portion 32 as shown in FIG. 13, and the lighting fixture 100 and the adapter 10 are not electrically connected. The first power supply terminal 123a of the holder 120 is not electrically connected to the other end 53a of the third terminal 53, and the second power supply terminal 123b of the holder 120 is not electrically connected to the other end 54a of the fourth terminal 54. Figure 13 is a partially enlarged cross-sectional view showing a second state in which the lighting device 100 in the embodiment is temporarily attached to the adapter 10.

Furthermore, when the adapter 10 is inserted into the holder 120 of the lighting fixture 100, as shown in Figures 1, 2 and 4, the inner circumferential surface of the locked portion 122b slides against the outer circumferential surface 37 of the locking body 33 of the first locking portion 31 and the outer circumferential surface 37 of the locking body 33 of the second locking portion 32, and then the first locking portion 31 and the second locking portion 32 move further in the outer diameter direction of the adapter 10 due to the biasing force of the elastic member 40. In other words, when the locked portion 122b moves away from the fixed portion 35 of the first locking portion 31 and the fixed portion 35 of the second locking portion 32, the first locking portion 31 and the second locking portion 32 return to their original positions due to the biasing force of the elastic member 40. The first locking portion 31 and the second locking portion 32 are displaced from the positions shown by the two-dot chain lines in Figure 4 to the positions shown by the solid lines. At this time, the first power supply terminal 123a of the holder 120 is inserted into the first insertion opening 22a and is electrically connected to the other end 53a of the third terminal 53. Also, the second power supply terminal 123b of the holder 120 is inserted into the second insertion opening 22b and is electrically connected to the other end 54a of the fourth terminal 54.

The gravity of the lighting fixture 100 causes the surface of the locked portion 122b of the holder 120 on the negative Z-axis side to come into contact with the first abutment surface 35a of the fixing portion 35 of the first locking portion 31 and the first abutment surface 35a of the fixing portion 35 of the second locking portion 32. As a result, the lighting fixture 100 is fixed to the adapter 10 in a normal state and held firmly, and receives power from the ceiling hook 3.

Next, we will explain how to remove the lighting fixture 100 from the adapter 10.

As shown in Figures 1 and 2, when the lighting device 100 is rotated in the circumferential direction of the central axis O, the first convex portion 124 of the holder 120 comes into contact with the second convex portion 21e of the main body 21 of the adapter 10, and the second convex portion 21e slides on the first convex portion 124 while pushing the lighting device 100 down in the negative direction of the Z axis. At this time, the third convex portion 125 in the holder 120 comes into contact with the first locking portion 31 and the second locking portion 32 and slides, while the first locking portion 31 and the second locking portion 32 are pressed by the respective third convex portions 125, so that the first locking portion 31 and the second locking portion 32 move in the direction of the central axis O of the adapter 10.

13, the first abutment surface 35a of the fixing portion 35 of the first locking portion 31 and the first abutment surface 35a of the fixing portion 35 of the second locking portion 32 move away from the abutment surface 122b1 of the locked portion 122b of the holder 120 (the first state is released), and the lighting device 100 moves in the negative Z-axis direction, so that the locked portion 122b abuts against the second abutment surface 36a of the temporary fastening portion 36 of the first locking portion 31 and the second abutment surface 36a of the temporary fastening portion 36 of the second locking portion 32. The first locking portion 31 and the second locking portion 32 are displaced from the positions shown by the two-dot chain lines in FIG. 13 to the positions shown by the solid lines. At this time, the first power supply terminal 123a of the holder 120 moves away from the other end 53a of the third terminal 53 and is electrically disconnected. Additionally, the second power supply terminal 123b of the holder 120 is separated from the other end 54a of the fourth terminal 54 and is electrically disconnected. Thus, the lighting device 100 is held in the adapter 10 in the second state in which it is temporarily fastened to the temporary fastening portion 36 of the first fastening portion 31 and the temporary fastening portion 36 of the second fastening portion 32.

In this way, when the first state in which the lighting device 100 is fixed to the adapter 10 is released, the second protrusion 21e engages with the first protrusion 124 formed on the lighting device 100, transitioning the first state in which the lighting device 100 is fixed to the adapter 10 to a second state of temporary fixation, thereby temporarily fixing the lighting device 100 to the adapter 10.

When the lighting device 100 is pressed down in the negative direction of the Z axis, the locked portion 122b slides against the first inclined surface 36a1 of the second abutment surface 36a of the temporary fastening portion 36 of the first locking portion 31 and the first inclined surface 36a1 of the second abutment surface 36a of the temporary fastening portion 36 of the second locking portion 32, and is pressed against the locked portion 122b, causing the first locking portion 31 and the second locking portion 32 to move in the direction of the central axis O of the adapter 10. This allows the lighting device 100 to be removed from the adapter 10.

When the lighting fixture 100 is temporarily attached to the adapter 10, if the lighting fixture 100 is pushed down in the negative Z-axis direction in a position tilted relative to the horizontal plane in order to remove the lighting fixture 100 from the adapter 10, the first inclined surface 36a1 or the second inclined surface 36a2 becomes approximately parallel to the abutment surface 122b1 of the locked portion 122b. Therefore, the first inclined surface 36a1 or the second inclined surface 36a2 comes into surface contact with the abutment surface 122b1 of the locked portion 122b, making it difficult for the locked portion 122b to slide relative to the first inclined surface 36a1 or the second inclined surface 36a2. Therefore, if the lighting fixture 100 is pushed down in the negative Z-axis direction in a position approximately parallel to the horizontal plane, the locked portion 122b abuts against the first inclined surface 36a1 and slides, and the lighting fixture 100 temporarily attached to the adapter 10 can be removed.

<Action and effect>
Next, the effects of adapter 10, lighting device 1, and lighting fixture 100 in the present embodiment will be described.

As described above, the adapter 10 in this embodiment is an adapter 10 for electrically and mechanically connecting the ceiling hook 3 and the lighting fixture 100, and includes a connector portion 70 having a first power supply portion 70a electrically connected to the first power supply terminal 123a provided on the lighting fixture 100, and a second power supply portion 70b electrically connected to the second power supply terminal 123b provided on the lighting fixture 100 so as to surround the first power supply terminal 123a. The first power supply portion 70a also has a first connection terminal 50a electrically connected to the first power supply terminal 123a. The second power supply portion 70b is formed to surround the periphery of the first connection terminal 50a, and has a second insertion port portion 22b that engages with the second power supply terminal 123b, and a second connection terminal 50b that is electrically connected to the second power supply terminal 123b engaged with the second insertion port portion 22b. The second insertion opening 22b has a protrusion 22c that abuts against the second power supply terminal 123b so as to support the second power supply terminal 123b.

According to this, since the protrusion 22c is formed on the second insertion opening 22b, when the second power supply terminal 123b is engaged with the second insertion opening 22b, the protrusion 22c can come into contact with and engage with the second power supply terminal 123b. Therefore, the lighting device 100 can be held in a predetermined position, and the lighting device 100 and the adapter 10 are mechanically firmly connected, so that the shaking of the lighting device 100 relative to the adapter 10 can be suppressed.

Therefore, this adapter 10 can prevent deterioration of the appearance of the lighting fixture 100 and suppress the shaking of the lighting fixture 100.

In particular, this lighting device 1 is unlikely to impair the appearance of the adapter 10.

In addition, the lighting device 1 in this embodiment includes an adapter 10 and a lighting fixture 100 that is electrically connected to the adapter 10.

This lighting fixture 100 also provides the same effects as described above.

In the adapter 10 of this embodiment, the first power supply terminal 123a and the second power supply terminal 123b of the lighting device 100 are convex terminals extending in the attachment/detachment direction, and the first power supply part 70a and the second power supply part 70b of the adapter 10 are concave power supply parts into which the first power supply terminal 123a and the second power supply terminal 123b are inserted. The protrusion 22c gradually narrows the gap at the opening of the second power supply part 70b in the insertion direction in which the second power supply terminal 123b is inserted into the second power supply part 70b.

As a result, when attaching the lighting fixture 100 to the adapter 10, the protrusion 22c can guide the second power supply terminal 123b. This makes it easy to attach the lighting fixture 100 to the adapter 10.

In addition, in the adapter 10 of this embodiment, the second power supply portion 70b is elastically deformable and has a second engagement portion that engages with the second power supply terminal 123b.

With this, the second engagement portion also engages with the second power supply terminal 123b, so that the lighting device 100 can be held more firmly in a predetermined position. As a result, the lighting device 100 and the adapter 10 are mechanically connected more firmly, so that shaking of the lighting device 100 relative to the adapter 10 can be further suppressed.

In the adapter 10 of this embodiment, the second engagement portion is a pair of elastic claw portions 22d that are provided on the second power supply portion 70b so as to sandwich the second power supply terminal 123b.

This allows the second power supply terminal 123b to be clamped by the pair of elastic claws 22d, so that the lighting device 100 can be held more securely. This makes it possible to more reliably suppress shaking of the lighting device 100 relative to the adapter 10.

The adapter 10 in this embodiment also includes a first locking portion 31 and a second locking portion 32 that protrude freely from the outer peripheral surface 10c of the adapter 10, thereby fixing the lighting device 100 to the adapter 10. When the adapter 10 is viewed in plan so as to face the connector portion 70, the second engagement portion is disposed on a straight line V2 that passes through the first power supply portion 70a and is perpendicular to the straight line V1 that connects the first locking portion 31 and the second locking portion 32.

For example, when stress is applied to the lighting fixture 100, the lighting fixture 100 swings relative to the adapter 10, with the first and second locking portions 31 and 32 as fulcrums. However, in this embodiment, the second engagement portion is disposed on a line V2 that is perpendicular to the line V1 that connects the first and second locking portions 31 and 32, so that the swinging of the lighting fixture 100 with the first and second locking portions 31 and 32 as fulcrums can be more reliably suppressed.

In addition, in the adapter 10 of this embodiment, when the adapter 10 is viewed in plan so as to face the connector portion 70, the protrusion portion 22c is positioned on a straight line V2 that passes through the first power supply portion 70a and is perpendicular to the straight line V1 that connects the first locking portion 31 and the second locking portion 32.

For example, when stress is applied to the lighting fixture 100, the lighting fixture 100 tends to swing relative to the adapter 10, with the first and second locking portions 31 and 32 as fulcrums. However, in this embodiment, the protrusion 22c is disposed on a line V2 that is perpendicular to the line V1 that connects the first and second locking portions 31 and 32, so that the swing of the lighting fixture 100 with the first and second locking portions 31 and 32 as fulcrums can be more reliably suppressed.

The adapter 10 in this embodiment also includes a housing 20 in which the connector portion 70 and the first and second locking portions 31 and 32 are provided. A pair of cutout portions 21h that expose the first and second locking portions 31 and 32 are formed in the housing 20 on the side opposite to the side on which the connector portion 70 of the housing 20 is arranged.

As a result, even if the user mistakenly attaches only the adapter 10 to the lighting device 100, the user can move the first locking portion 31 and the second locking portion 32 into the housing 20 while pinching the first locking portion 31 and the second locking portion 32 through the cutout portion 21h. This makes it easier to remove the adapter 10 from the lighting device 100.

In addition, in the adapter 10 of this embodiment, the first locking portion 31 and the second locking portion 32 have protrusions 33a that are positioned in a pair of cutout portions 21h.

This allows the user to move the first locking portion 31 and the second locking portion 32 into the housing 20 while holding the protruding portion 33a. This makes it easier to remove the adapter 10 from the lighting device 100.

In addition, in the adapter 10 of this embodiment, when the lighting device 100 is fixed to the adapter 10, each of the first locking portion 31 and the second locking portion 32 is in a first state in which it protrudes a first amount from the outer peripheral surface 10c of the adapter 10.

In this way, in the first state, the first locking portion 31 and the second locking portion 32 are each locked to the locked portion 122b, so vertical movement of the lighting fixture 100 can be suppressed. Therefore, even if the lighting fixture 100 is moved unexpectedly, the first locking portion 31 and the second locking portion 32 can reliably fix the lighting fixture 100 to the adapter 10. This allows the adapter 10 to further suppress the lighting device 1 from falling.

In addition, in the adapter 10 of this embodiment, when the lighting device 100 is temporarily attached to the adapter 10, each of the first locking portion 31 and the second locking portion 32 is in a second state in which it protrudes from the outer peripheral surface 10c of the adapter 10 by a second amount that is smaller than the first amount.

Accordingly, even if the first state is released, the first state transitions to the second state, so that the first locking portion 31 and the second locking portion 32 can each hold the lighting fixture 100 in a predetermined position on the adapter 10. This allows the adapter 10 to better prevent the lighting device 1 from falling off.

In addition, in the adapter 10 of this embodiment, the connector portion 70 is detachably attached to the connector portion 123 having the first power supply terminal 70a and the second power supply portion 70b, and is electrically connected to the connector portion 123 in the first state and is electrically disconnected from the connector portion 123 in the second state.

According to this, in the first state, power is supplied to the lighting fixture 100, and the lighting fixture 100 is turned on, allowing the user to recognize that the lighting fixture 100 and the adapter 10 are securely electrically and mechanically connected. In the second state, power is not supplied to the lighting fixture 100, and the lighting fixture 100 does not turn on, allowing the user to recognize that the electrical and mechanical connections between the lighting fixture 100 and the adapter 10 are incomplete. In this case, the user attaches the lighting fixture 100 to the adapter 10 so that the lighting fixture 100 is securely fixed to the adapter 10. As a result, the adapter 10 makes it easier to prevent the lighting fixture 100 from falling.

The adapter 10 in this embodiment also includes: (1) a locking section 80 that protrudes from the surface 10a of the housing 20 and is inserted into an opening on the surface of the ceiling hook 3 when the housing 20 of the adapter 10 is attached to the ceiling hook 3 in a predetermined positional relationship; and (2) a restricting section 92 that is pressed by the surface of the ceiling hook 3 when the housing 20 is attached to the ceiling hook 3 without being in the predetermined positional relationship; and a restricting section 92 that is displaced to a position that prevents electrical connection of the second power supply terminal 123b to the second power supply section 70b when the locking section 80 is pressed by the surface of the ceiling hook 3.

Accordingly, when the locking portion 80 is pressed by the surface of the ceiling hook 3, the restricting portion 92 is displaced to a position that prevents the electrical connection of the second power supply terminal 123b to the second power supply portion 70b. Therefore, even if an attempt is made to attach the lighting device 100 to the adapter 10, the electrical connection with the second power supply portion 70b is prevented, making it impossible to attach the lighting device 100 to the adapter 10. This allows the user to notice that the adapter 10 is incompletely attached to the ceiling hook 3.

Therefore, the adapter 10 can be prevented from being incompletely connected to the ceiling hook 3. As a result, it is possible to prevent the adapter 10 and the lighting fixture 100 from falling off due to the adapter 10 being incompletely connected to the ceiling hook 3.

In addition, in the adapter 10 of this embodiment, the restricting portion 92 is disposed inside the recessed portion of the second power supply portion 70b so that the locking portion 80 is displaced to a position that prevents electrical connection of the second power supply terminal 123b to the second power supply portion 70b when pressed by the surface of the ceiling hook 3.

When the locking portion 80 is pressed by the surface of the ceiling hook 3, the restricting portion 92 is positioned inside the recessed portion of the second power supply portion 70b into which the second power supply terminal 123b is inserted. Therefore, even if an attempt is made to attach the lighting fixture 100 to the adapter 10, the second power supply terminal 123b comes into contact with the restricting portion 92, preventing an electrical connection with the second power supply portion 70b, and the lighting fixture 100 cannot be attached to the adapter 10. Therefore, with the adapter 10 of this embodiment, it is possible to further prevent the lighting fixture 100 from being connected to the ceiling hook 3 in an incomplete state.

In addition, the adapter 10 in this embodiment includes a first locking portion 31 and a second locking portion 32 that protrude freely from the outer peripheral surface 10c of the adapter 10 to fix the lighting fixture 100 to the adapter 10. Each of the first locking portion 31 and the second locking portion 32 has a fixing portion 35 that locks the locked portion 122b of the lighting fixture 100 to the adapter 10, and a temporary fastening portion 36 that temporarily fastens the lighting fixture 100 to the adapter 10 by engaging with the locked portion 122b. The temporary fastening portion 36 has a second abutment surface 36a that abuts against the locked portion 122b when the lighting fixture 100 is temporarily fastened to the adapter 10. The second abutment surface 36a is an inclined surface that slopes downward in a direction away from the outer peripheral surface 10c of the adapter 10 with respect to a virtual plane W0 perpendicular to the attachment/detachment direction of the adapter 10 to the hook ceiling 3. The second contact surface 36a has a first inclined surface 36a1 and a second inclined surface 36a2 that is inclined at a different angle from the first inclined surface 36a1 with respect to the imaginary plane W0.

For example, when the lighting fixture 100 is temporarily attached to the adapter 10, if a vertical downward stress is applied to one point of the lighting fixture 100 in order to remove the lighting fixture 100 from the adapter 10, the posture of the lighting fixture 100 tilts with respect to the adapter 10. At this time, the first inclined surface 36a1 or the second inclined surface 36a2 becomes approximately parallel to the locked portion 122b (in this embodiment, the abutment surface 122b1 of the locked portion 122b). Therefore, the first inclined surface 36a1 or the second inclined surface 36a2 comes into contact with the locked portion 122b (in this embodiment, it comes into surface contact with the abutment surface 122b1), making it difficult for the locked portion 122b to slide against the first inclined surface 36a1 or the second inclined surface 36a2, and therefore the first locking portion 31 and the second locking portion 32 become difficult to move toward the center of the adapter 10 (become difficult to move so as to be accommodated in the housing 20). This makes it difficult for the lighting fixture 100 to separate from the adapter 10 even when the lighting fixture 100 is temporarily attached to the adapter 10.

When the lighting fixture 100 is temporarily attached to the adapter 10, if a vertical downward stress is applied to the lighting fixture 100 while holding both ends of the lighting fixture 100 with the lighting fixture 100 in a substantially horizontal position in order to remove the lighting fixture 100 from the adapter 10, the first inclined surface 36a1 is inclined relative to the horizontal plane, so that the locked portion 122b can slide on the first inclined surface 36a1. Therefore, the first inclined surface 36a1 is pressed by the locked portion 122b, so that the first locking portion 31 and the second locking portion 32 can move toward the center of the adapter 10. Therefore, the lighting fixture 100 temporarily attached to the adapter 10 can be removed.

In this way, even when the lighting fixture 100 is temporarily attached to the adapter 10, the lighting fixture 100 can be held by the adapter 10 by performing an incorrect removal operation of the lighting fixture 100, and the lighting fixture 100 can be easily removed from the adapter 10 by performing a correct removal operation of the lighting fixture 100. Since the lighting fixture 100 can be prevented from falling, this adapter 10 can increase the safety of the lighting fixture 100.

In the adapter 10 of this embodiment, the second inclined surface 36a2 is disposed on both sides of the first inclined surface 36a1. The angle θ1 of the first inclined surface 36a1 relative to the imaginary plane W0 is greater than the angle θ2 of the second inclined surface 36a2 relative to the imaginary plane W0.

When the lighting fixture 100 is temporarily attached to the adapter 10, the lighting fixture 100 can be easily removed from the adapter 10 by performing the correct removal operation of the lighting fixture 100, in which both ends of the lighting fixture 100 are grasped and vertical downward stress is applied while the lighting fixture 100 is in a substantially horizontal position, so that the lighting fixture 100 can be easily removed from the adapter 10.

In the adapter 10 of this embodiment, each of the first locking portion 31 and the second locking portion 32 may have a fixing portion 35 that locks the lighting fixture 100 to the adapter 10 by locking the locked portion 122b of the lighting fixture 100, and a temporary fastening portion 36 that temporarily fastens the lighting fixture 100 to the adapter 10 by engaging with the locked portion 122b. The temporary fastening portion 36 may have an abutment surface 122b1 that abuts against the locked portion 122b when the lighting fixture 100 is temporarily fastened to the adapter 10. The abutment surface 122b1 may be a second abutment surface 36a that is inclined downward in a direction away from the outer peripheral surface 10c of the adapter 10 with respect to a virtual plane W0 perpendicular to the attachment/detachment direction of the adapter 10 to the ceiling hook 3.

Accordingly, when removing the lighting fixture 100 from the ceiling hook 3, the lock between the fixed portion 35 of the first locking portion 31 and the second locking portion 32 and the locked portion 122b may be released, for example, by rotating the lighting fixture 100. When the lock is released, the lighting fixture 100 moves vertically downward relative to the adapter 10 due to its own weight, but since the locked portion 122b and the temporary fastening portion 36 engage with each other, the lighting fixture 100 may get caught on the adapter 10 and may be prevented from falling.

Therefore, this adapter 10 may be able to prevent the lighting device 1 from falling even if the lighting device 1 is moved unexpectedly.

In particular, since the abutment surface of the temporary fastening portion 36 is the second abutment surface 36a, even if the locked portion 122b and the temporary fastening portion 36 are engaged, the first locking portion 31 and the second locking portion 32 may move when the lighting device 100 is pressed down, thereby releasing the engagement between the locked portion 122b and the temporary fastening portion 36. This may allow the lighting device 100 to be removed reliably and safely.

(Other variations, etc.)
Although the embodiments have been described above, the present disclosure is not limited to the above-described embodiments.

For example, the lighting fixture and lighting device described in the above embodiment are just examples, and the specific aspects of the lighting device and lighting fixture are not particularly limited. The lighting device and lighting fixture may be in any form as long as they are connected to the ceiling hook body using an adapter.

Furthermore, in the adapter, lighting fixture, and lighting device described in the above embodiments, the multiple locking portions may be integrated into a single member.

In the adapter and lighting device described in the above embodiment, as shown in Figs. 14 and 15, the bottom 122 of the holder 120 is provided with a cushioning member 191 such as a packing that abuts against the back surface 10b of the adapter 10. That is, the cushioning member 191 is provided on the surface of the bottom 122 of the holder 120 that faces the back surface 10b of the adapter 10. When the adapter 10 is attached to the holder 120 of the lighting device 100 in a normal state, the cushioning member 191 is sandwiched between the back surface 10b of the adapter 10 and the bottom 122 of the holder 120 and compressed. At this time, the thickness of the cushioning member 191 is smaller than when the adapter 10 is not attached to the holder 120. In this way, since the cushioning member 191 is disposed between the back surface 10b of the adapter 10 and the bottom 122 of the holder 120, the shaking of the lighting device 100 relative to the adapter 10 can be more reliably suppressed. In addition, since the cushioning member 191 is provided inside the holder 120, the appearance of the lighting fixture 100 is unlikely to be impaired. Fig. 14 is a perspective view showing the lighting device 1 having the lighting fixture 100 and the adapter 0, and the ceiling hook 3. Fig. 15 is a partially enlarged cross-sectional view showing the first state in which the lighting fixture 100 is normally fixed to the adapter 10. Although the cushioning member 191 is provided in the holder 120, it may also be provided in the adapter 10 (specifically, the back surface 10b of the adapter 10).

In the adapter and lighting device described in the above embodiment, the connector part of the adapter is concave, but may be a convex connector part. That is, the other end of the third terminal and the other end of the fourth terminal of the connector part may be configured to protrude from the first insertion opening part and the second insertion opening part. In this case, the first power supply terminal and the second power supply terminal may be configured to be recessed from the bottom part of the holder. That is, the connector part of the adapter may be a male connector part, and the power supply part of the socket may be a female connector part. In the adapter, the first power supply terminal and the second power supply terminal of the lighting device are convex terminals extending in the attachment/detachment direction, and the first power supply terminal and the second power supply terminal of the adapter are concave power supply terminals into which the first power supply terminal and the second power supply terminal are inserted, but the first power supply terminal and the second power supply terminal of the lighting device are concave terminals extending in the attachment/detachment direction, and the first power supply terminal and the second power supply terminal of the adapter may be convex power supply terminals inserted into the first power supply terminal and the second power supply terminal.

In the adapter and lighting device described in the above embodiment, the outer wall of the holder may have a first locked portion and a second locked portion. The first locked portion may be an annular protrusion formed on the negative Z-axis side of the second locked portion, and may protrude from the inner surface of the outer wall so as to narrow the inner diameter of the outer wall. In the first state, the first locked portion abuts against the fixing portion of the locking body in each of the first and second locking portions. The first locked portion may be formed on the inner surface of the outer wall and located between the second locked portion and the bottom of the holder. In addition, the second locked portion may be an annular protrusion formed on the edge of the outer wall of the holder on the positive Z-axis side, and may protrude from the inner surface of the outer wall so as to narrow the inner diameter of the outer wall. In the second state, the second locked portion abuts against the provisional fastening portion of the locking body in each of the first and second locking portions. The second locked portion has approximately the same diameter as the first locked portion when the holder is viewed from above, but may be larger or smaller in diameter than the first locked portion.

Furthermore, in the adapter and lighting device described in the above embodiment, the specific form of the hook-on ceiling body is not particularly limited. Examples of the hook-on ceiling body that can be used include a round full hook-on ceiling, a full hook-on rosette, a round hook-on ceiling, a square hook-on ceiling, a recessed hook-on rosette, and an exposed hook-on rosette.

In addition, this disclosure also includes forms obtained by applying various modifications to the embodiments and modifications of the embodiments that would come to mind by a person skilled in the art, and forms realized by arbitrarily combining the components and functions of the embodiments and modifications of the embodiments within the scope of the spirit of this disclosure.

1 Lighting device 3 Ceiling hook 10 Adapter 20 Housing 22b Second insertion opening portion (first engagement portion)
22c Protrusion 22d Elastic claw portion (second engagement portion)
21h Cutout portion 31 First locking portion 32 Second locking portion 33a Protrusion 36a Second abutment surface (abutment surface)
50a First connecting terminal 50b Second connecting terminal 70 Connector portion 70a First power supply portion 70b Second power supply portion 100 Lighting fixture 123 Connector portion 123a First power supply terminal 123b Second power supply terminal V1, V2, W1, W2 Straight line W0 Imaginary plane

Claims (14)

An adapter for electrically and mechanically connecting a ceiling hook to a lighting fixture,
a connector portion having a first power supply portion electrically connected to a first power supply terminal provided on the lighting fixture and a second power supply portion electrically connected to a second power supply terminal provided on the lighting fixture so as to surround the first power supply terminal,
the first power supply portion has a first connection terminal electrically connected to the first power supply terminal,
The second power supply unit is
a first engagement portion that is formed to surround the first connection terminal and that engages with the second power supply terminal;
a second connection terminal electrically connected to the second power supply terminal engaged with the first engagement portion;
the first engagement portion has a protrusion that abuts against the second power supply terminal so as to support the second power supply terminal,
the second power supply portion is elastically deformable and has a second engagement portion that engages with the second power supply terminal,
The second engagement portion is a pair of elastic claws, and is provided on the second power supply portion so as to sandwich the second power supply terminal.
adapter. the first power supply terminal and the second power supply terminal of the lighting device are convex terminals extending in a mounting/removal direction, and the first power supply portion and the second power supply portion of the adapter are concave power supply portions into which the first power supply terminal and the second power supply terminal are inserted,
The adapter according to claim 1 , wherein the protrusion gradually narrows a gap of the opening of the second power supply part in an insertion direction in which the second power supply terminal is inserted into the second power supply part. a pair of locking portions that protrude freely from an outer peripheral surface of the adapter to fix the lighting fixture to the adapter;
The adapter according to claim 1 or 2, wherein when the adapter is viewed in a planar view so as to face the connector portion, the second engagement portion is disposed on a straight line that passes through the first power supply portion and is perpendicular to a straight line connecting the pair of locking portions. The adapter according to claim 3 , wherein when the adapter is viewed in a plan view facing the connector portion, the protrusion portion is arranged on a straight line that passes through the first power supply portion and is perpendicular to a straight line connecting the pair of locking portions. a housing in which the connector portion and the pair of locking portions are provided,
The adapter according to claim 3 or 4, wherein the housing has a pair of cutouts for exposing the pair of locking portions on a side opposite to a side on which the connector portion is disposed. The adapter according to claim 5 , wherein the pair of locking portions have protrusions that are disposed in the pair of cutout portions. The adapter according to any one of claims 3 to 6 , wherein each of the pair of engaging portions is in a first state in which it protrudes from an outer peripheral surface of the adapter by a first amount when the lighting device is fixed to the adapter. The adapter according to claim 7 , wherein each of the pair of locking portions is in a second state in which it protrudes from an outer peripheral surface of the adapter by a second amount less than the first amount when the lighting fixture is temporarily fastened to the adapter. The connector portion is
The power supply terminal is detachably provided to a connector portion having the first power supply terminal and the second power supply terminal ,
In the first state, the connector is electrically connected to the connector portion,
The adapter according to claim 8 , wherein in the second state, the adapter is electrically disconnected from the connector portion. (1) when the housing of the adapter is attached to the ceiling-mounted hook in a predetermined positional relationship, the locking portion protrudes from the mounting surface of the housing and is inserted into an opening provided in the surface of the ceiling-mounted hook, and (2) when the housing is attached to the ceiling-mounted hook in a state other than the predetermined positional relationship, the locking portion is pressed by the surface of the ceiling-mounted hook.
The adapter according to any one of claims 1 to 9 , further comprising a restricting portion that is displaced to a position that prevents electrical connection of the second power supply terminal to the second power supply portion when the locking portion is pressed by a surface of the ceiling hook. The adapter according to claim 10, wherein the restricting portion is disposed inside the concave portion of the second power supply portion so that the locking portion is displaced to a position that prevents electrical connection of the second power supply terminal to the second power supply portion when pressed by a surface of the ceiling hook. a pair of locking portions that protrude freely from an outer peripheral surface of the adapter to fix the lighting fixture to the adapter;
Each of the pair of locking portions is
a fixing portion that fixes the lighting fixture to the adapter by engaging a locking portion of the lighting fixture;
a temporary fastening portion that temporarily fastens the lighting fixture to the adapter by engaging with the locked portion;
the temporary fastening portion has an abutment surface that abuts against the locked portion when the lighting fixture is temporarily fastened to the adapter,
The contact surface is
a slope that slopes downward in a direction away from the outer circumferential surface of the adapter with respect to a virtual plane perpendicular to a direction in which the adapter is attached to and detached from the ceiling hook;
The adapter according to any one of claims 1 to 11 , comprising a first inclined surface and a second inclined surface that is inclined at an angle different from that of the first inclined surface with respect to the imaginary plane. The second inclined surfaces are disposed on both sides of the first inclined surface,
The adapter of claim 12 , wherein an angle of the first inclined surface relative to the imaginary plane is greater than an angle of the second inclined surface relative to the imaginary plane. An adapter according to any one of claims 1 to 13 ;
A lighting device comprising: a lighting fixture electrically connected to the adapter.

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