JP6633945B2 - LED lighting device - Google Patents

Description

  The present invention relates to an LED lighting device constituting a downlight mounted on a ceiling of a house or the like.

  An LED lighting device that constitutes a downlight mounted on a ceiling of a house or the like includes an LED unit (eg, an LED bulb), a device case that houses the LED unit, and a support piece that is an elastic body fixed to the device case. That is common. For example, Patent Document 1 discloses an example of such an LED lighting device. In the LED lighting device disclosed in Patent Literature 1, one end of a support piece (mounting spring 27 of Patent Literature 1) is fixed to a side surface of an apparatus case (Reflector 25 of Patent Literature 1), and the support piece is attached to the side surface. It extends vertically downward. The support piece that extends vertically downward is bent in a state of being in contact with a flange (a flange 28 of Patent Document 1) formed at the lower end of the side surface of the device case, and is in a state of protruding laterally. The bent portion serves as a rotation fulcrum of the support piece, and when a load is applied to the overhanging portion, the support piece rotates. Further, the tip of the support piece that protrudes laterally protrudes vertically downward.

  When mounting such an LED lighting device on a ceiling, the projecting portion of the support piece is folded along the side of the device case, and the tip of the support piece is hooked on the periphery of a mounting hole provided in the ceiling. The LED lighting device is suspended from the ceiling. In this state, when the LED lighting device is pushed behind the mounting hole, the support piece protrudes to the side due to the restoring force, and the protruding portion contacts the ceiling, whereby the LED lighting device is mounted on the ceiling. At this time, the LED lighting device is buried behind the ceiling.

  FIG. 1 of Patent Document 1 shows a state of an LED lighting device mounted on a ceiling. According to FIG. 1, a bent portion (corresponding to a rotation fulcrum of the support piece) of the support piece (the mounting spring 27 of Patent Document 1) that comes into contact with the flange portion (the collar portion 28 of Patent Document 1) is attached to a ceiling mounting hole. (Mounting hole 12 of Patent Document 1). Here, the support piece abuts on the inner surface of the mounting hole provided in the ceiling while projecting laterally (outward in the radial direction of the device case). Therefore, the diameter of the mounting hole provided in the ceiling must be not only the outer diameter of the device case, but also the length necessary to accommodate the bent portion of the support piece in a state of being protruded inside the mounting hole. Must. For this reason, the diameter of the mounting hole is necessarily longer than the size of the device case in plan view (viewed in the vertical direction). In such an LED lighting device, if a larger size of the LED unit is applied in order to increase the illuminance in the room, the size of the device case accommodating the LED unit in a plan view is enlarged, so that the mounting provided on the ceiling is performed. The diameter of the holes is even longer. Therefore, the LED lighting device is not compactly mounted on the ceiling, and the outer appearance of the flange portion of the LED lighting device is lengthened, which hinders aesthetic appearance and the diameter of the mounting hole becomes longer, thereby lowering the strength of the ceiling. I am concerned.

JP 2013-143235 A

  The present invention has been conceived under the circumstances described above, and has as its main object to provide an LED lighting device that can be compactly mounted on a ceiling of a house or the like.

  An LED lighting device provided by the present invention includes a first plate portion having a front surface and a back surface facing each other in a first direction, and surrounding the first plate portion in the first direction, and a first plate portion. A device case having a second plate portion extending in a direction in which the back surface faces out of the first direction, and an LED unit detachably attached to the back surface side with respect to the first plate portion. A device support that is detachably attached to the device case, wherein the device support includes a plurality of locking plates each extending in a direction in which the back surface faces in the first direction, Each locking plate is a first extension piece located closer to the first plate portion in the first direction, and is located farther from the first plate portion in the first direction than the first extension piece. And the device extending along the first direction A second extension piece located closer to the center line than the first extension piece in a radial direction with respect to a center line of the holding body, wherein the plurality of locking plates are viewed in the first direction. A first position in which the second plate portion can be arranged in a space surrounded by the plurality of locking plates, and a maximum in the radial direction of at least one of the first extending pieces of the plurality of locking plates; The posture can be changed between a second posture in which the protrusion length is shorter than when the first posture is taken.

  In a preferred embodiment, the device support has a third plate portion to which the locking plates are attached.

  In a preferred embodiment, each of the locking plates has a connecting plate portion that is partially overlapped with the third plate portion.

  In a preferred embodiment, at least one of the plurality of locking plates is rotatable around an axis along the first direction.

  In a preferred embodiment, the axis passes through an overlapping portion of the third plate portion and the connection plate portion.

  In a preferred embodiment, one of the connection plate portion and the third plate portion is formed with an arc-shaped groove centered on the axis, and the other is provided with a protrusion inserted into the arc-shaped groove. Have been.

  In a preferred embodiment, the plurality of locking plates take the first position when the first inner edge portion in the circumferential direction of the arc-shaped groove abuts on the protrusion, and the plurality of locking plates take the arc-shaped groove. Takes the second position when the other second inner edge in the circumferential direction abuts on the protrusion.

  In a preferred embodiment, the third plate portion is arranged in parallel with the first plate portion, and has a main plate portion having a portion overlapping with the connection plate portion of each of the locking plates, and an end of the main plate portion. A projection that bends from an edge and projects in a direction in which the back surface faces in the first direction.

  In a preferred embodiment, when the plurality of locking plates take the first posture, an edge of the connection plate portion of the locking plate rotatable around the axis contacts the protruding portion. .

  In a preferred embodiment, the device support includes a lock mechanism that prevents rotation of the locking plate that is rotatable around the axis when the plurality of locking plates take the first posture.

  In a preferred embodiment, the lock mechanism includes a screw hole formed in the other of the connection plate portion and the third plate portion, a screw shaft screwed into the screw hole, and one end of the screw shaft. And a bolt member in which the screw shaft is the protrusion.

  In a preferred embodiment, the device support has a base end movably attached to the first extension piece along the first direction, and the device support body has a A locking member extending radially outward;

  In a preferred embodiment, the locking member is a first member that is inclined outward from the base end portion toward the distal end portion in the radial direction and inclined so as to be directed to the back surface of the first direction. And a second position in which the base end is closer to the direction in which the surface faces in the first direction than the first position, and extends substantially along the first direction from the base end to the front end. The position can be displaced.

  In a preferred embodiment, when the locking member is in the first position, when a force is applied to the distal end in a direction of the surface in the first direction, the first extension piece is applied to the first extension piece. A moment acts in a direction in which the surface faces with the base end side as a center of rotation.

  In a preferred embodiment, each of the locking plates has a step portion connected to the first extension piece and the second extension piece.

  In a preferred embodiment, each of the locking plates has a folded portion that is connected to the back surface side in the first direction with respect to the second extension piece and extends in a direction away from the center line.

  In a preferred embodiment, the plurality of locking plates are arranged so as to form a pair on the opposite side across the center line in the first direction.

  In a preferred embodiment, the terminal unit includes a terminal block electrically connected to the LED unit and connected to an external power supply cable, and a terminal block support fixed to the surface and supporting the terminal block.

  In a preferred embodiment, the terminal block is located between the pair of locking plates in a direction in which the pair of locking plates are separated from each other.

  In a preferred embodiment, the power supply cable is connected to the terminal block from the outside in the radial direction to the inside.

  In a preferred embodiment, the terminal block is disposed so as to be entirely separated from the surface when viewed in the first direction.

  In a preferred embodiment, the terminal block is arranged so that a part thereof protrudes from the surface when viewed in the first direction.

  In a preferred embodiment, the terminal block support has a support fixing section fixed to the surface, and a terminal block support section connected to the support fixing section and supporting the terminal block.

  In a preferred embodiment, the terminal block support section has a support section back face facing in the same direction as the back face, and the terminal block is supported by the support section back face.

  In a preferred embodiment, a part of the terminal block is located on the back side with respect to the first plate portion in the first direction.

  In a preferred embodiment, a support projection is formed on the support fixing portion, the support protrusion protruding in a direction in which the back surface faces in the first direction, and the support protrusion is formed on the first plate portion. Engaged with the support engaging hole.

  In a preferred embodiment, the device case is interposed between the first plate portion and the second plate portion, and the direction of the first direction increases from the first plate portion toward the second plate portion. And a tapered portion that is inclined so that the diameter of the cross section of the device case with respect to the above becomes longer.

  In a preferred embodiment, a socket fixed to the back surface and connected to the terminal block is provided, and the LED unit is detachably attached to the socket.

  In a preferred embodiment, the device case has an opening formed by an edge of the second plate portion facing the direction in which the back surface faces in the first direction, and the device case is viewed in the first direction. The shape of the opening is circular.

  In a preferred embodiment, the device case has an annular flange formed along the opening and extending in a direction perpendicular to the first direction.

  In a preferred embodiment, the flange has a flange surface facing the surface of the first direction, and an annular packing is arranged on the flange surface.

  In a preferred embodiment, the shape of the LED unit as viewed in the first direction is a circular shape.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to attach an LED lighting device to a ceiling compactly, avoiding inconvenience.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a perspective view of the LED lighting device concerning one embodiment of the present invention. It is a top view of the LED lighting device shown in FIG. It is a bottom view of the LED lighting device shown in FIG. It is a side view of the LED lighting device shown in FIG. FIG. 2 is a plan view of a device case of the LED lighting device shown in FIG. 1. It is sectional drawing of the LED lighting device shown in FIG. 1 attached to the ceiling. It is the elements on larger scale of FIG. It is a top view for explaining a device support. It is a top view for explaining a device support. It is a partial expanded sectional view for explaining a device support. It is a partial expanded sectional view for explaining a device support. It is a partial expanded sectional view for explaining a device support. FIG. 2 is a front view of a terminal block support of the LED lighting device shown in FIG. 1. FIG. 2 is a left side view of a terminal block support of the LED lighting device shown in FIG. 1. It is a top view of the LED unit of the LED lighting device shown in FIG. It is a side view of the LED unit shown in FIG. It is a bottom view of the LED unit shown in FIG. FIG. 16 is a sectional view taken along the line XVIII-XVIII in FIG. 15. It is a top view of the LED light emission part of the LED unit shown in FIG. FIG. 20 is a sectional view taken along line XX-XX in FIG. 19. FIG. 20 is an enlarged plan view of a main part of the LED light emitting unit shown in FIG. 19 (a sealing resin and a holder are omitted). It is a partial expanded sectional view showing an example of the state where the LED lighting device concerning a comparative example was attached to a ceiling. It is a top view similar to FIG. 8 which shows the other example of a device support. FIG. 24 is an enlarged end view taken along the line XXIV-XXIV of FIG. 23.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  An LED lighting device according to an embodiment of the present invention will be described with reference to FIGS. The LED lighting device A10 of this embodiment includes an LED unit B, a device case 5, a socket 58, a device support 6, a terminal block 81, and a terminal block support 82.

  FIG. 1 is a perspective view of the LED lighting device A10. FIG. 2 is a plan view of the LED lighting device A10. FIG. 3 is a bottom view of the LED lighting device A10. FIG. 4 is a side view of the LED lighting device A10, which is partially cut away. FIG. 5 is a plan view of the device case 5 of the LED lighting device A10. FIG. 6 is a cross-sectional view of the LED lighting device A10 mounted on the ceiling. FIG. 7 is a partially enlarged view of FIG. FIG. 8 and FIG. 9 are plan views for explaining the device support 6. FIGS. 10, 11 and 12 are partially enlarged cross-sectional views for explaining the device support 6. FIG. 13 is a front view of the terminal block support 82 of the LED lighting device A10. FIG. 14 is a left side view of the terminal block support 82 of the LED lighting device A10.

  The LED lighting device A10 shown in these figures constitutes a downlight attached to the ceiling C shown in FIG. Here, for convenience of description, the vertical axis direction in which the center line Oz of the device support 6 in the LED lighting device A10 attached to the ceiling C extends extends in a plane perpendicular to the first direction Z and the first direction Z. , An arbitrary direction extending from the center line Oz is defined as a radial direction X.

  The LED unit B is a part that constitutes a main body of the LED lighting device A10 and serves as a light source of the LED lighting device A10. The LED unit B is housed in the device case 5. Note that, for convenience of description, a specific configuration of the LED unit B will be described later.

  The device case 5 is a member that houses and holds the LED unit B, which is integrally formed by squeezing, such as aluminum die casting. As shown in FIGS. 2 and 5, the shape of the device case 5 in the first direction Z (plan view) is a circle. The device case 5 has a first plate portion 51, a second plate portion 52, an opening 521, a tapered portion 53, and a flange portion. The color of the device case 5 is not particularly limited, and the entire surface of the device case 5 according to the present embodiment is painted white.

  As shown in FIGS. 1, 2, and 5, the first plate portion 51 is a plate member having a circular shape when viewed in the first direction Z. The first plate portion 51 has a front surface 511 and a back surface 512 that face opposite sides in the first direction Z. The front surface 511 is the upper surface of the first plate portion 51 shown in FIG. 6, and is a surface facing the outside of the LED lighting device A10. The back surface 512 is the lower surface of the second plate portion 52 shown in FIG. Both the front surface 511 and the back surface 512 are flat surfaces. In the present embodiment, the terminal block support 82 is fixed to the front surface 511. In the present embodiment, the LED unit B is detachably attached to the back surface 512 via the socket 58.

  As shown in FIG. 5, a pair of socket fixing holes 513 are formed in the first plate portion 51 so as to be separated from each other on opposite sides of the center of the device case 5. These are screw holes penetrating the first plate portion 51 in the first direction Z, and are used when fixing the socket 58 to the back surface 512 side. In the present embodiment, a device support mounting hole 514 is formed at the center of the first plate portion 51. The device support member mounting hole 514 is a hole that penetrates the first plate portion 51 in the first direction Z, and is a hole through which a later-described mounting bolt 67 is inserted.

  Further, as shown in FIG. 5, a support fixing hole 515 and a support engaging hole 516 are formed in the first plate portion 51 so as to be separated from the pair of socket fixing holes 513 and the device support mounting hole 514. Have been. The support fixing holes 515 are screw holes penetrating the first plate 51 in the first direction Z, and the support engagement holes 516 are holes penetrating the first plate 51 in the first direction Z. The support fixing holes 515 and the support engaging holes 516 are holes used for fixing the terminal block support 82 to the surface 511.

  Further, as shown in FIG. 5, a cable insertion hole 517 is formed in the first plate portion 51 near the support fixing hole 515. The cable insertion hole 517 is a hole penetrating the first plate portion 51 in the first direction Z. A conduction cable 88 that connects the socket 58 and the terminal block 81 to each other is inserted through the cable insertion hole 517.

  As shown in FIGS. 1, 4, and 6, the second plate portion 52 surrounds the first plate portion 51 in the first direction Z, and has a back surface 512 in the first direction Z with respect to the first plate portion 51. Is a plate member extending in a direction (emission direction of light emitted from the LED unit B). The shape of the second plate portion 52 is cylindrical. As shown in FIG. 6, the opening 521 is a portion formed by an edge of the second plate portion 52 facing the direction in which the back surface 512 faces in the first direction Z. As shown in FIG. 3, the shape of the opening 521 in the first direction Z is a circular shape.

  As shown in FIGS. 1, 4, and 6, the tapered portion 53 is interposed between the first plate portion 51 and the second plate portion 52 and goes from the first plate portion 51 to the second plate portion 52. The plate member is inclined so that the diameter of the cross section of the device case 5 with respect to the first direction Z becomes longer. As shown in FIG. 6, the shape of the tapered portion 53 is a hollow truncated cone. In the present embodiment, the edge of the tapered portion 53 surrounds the first plate portion 51 in the first direction Z and is connected to the first plate portion 51. Further, the second plate portion 52 is connected to the edge of the tapered portion 53 located on the side opposite to the edge where the first plate portion 51 is connected in the first direction Z.

  As shown in FIGS. 1 to 6, the flange 54 is a portion formed along the opening 521 and extending in a direction perpendicular to the first direction Z. The shape of the flange 54 is annular. The flange 54 has a flange front surface 541 and a flange rear surface 542 facing in opposite directions in the first direction Z. The flange portion surface 541 is the upper surface of the flange portion 54 illustrated in FIG. 4, and is a surface that faces the direction in which the surface 511 faces in the first direction Z. The flange rear surface 542 is a lower surface of the flange 54 illustrated in FIG. 4, and is a surface that faces the direction of the rear surface 512 in the first direction Z. When the LED lighting device A10 is mounted on the ceiling C, the flange back surface 542 is exposed from the ceiling C. As shown in FIG. 4, in the present embodiment, an annular packing 59 is disposed on the flange surface 541. The packing 59 is made of, for example, a closed-cell synthetic rubber sponge using ethylene-propylene rubber. As shown in FIG. 6, when the LED lighting device A10 is attached to the ceiling C, the packing 59 is sandwiched between the ceiling C and the flange surface 541.

  As shown in FIG. 6, the socket 58 is a member fixed to the back surface 512 and electrically connected to the terminal block 81 via the conductive cable 88. The socket 58 is fixed, for example, by screwing a fastening bolt 57 into a socket fixing hole 513 of the first plate portion 51. The socket 58 is housed in the device case 5 together with the LED unit B. The socket 58 is made of a synthetic resin, unlike the device case 5. The socket 58 has, for example, a hollow cylindrical shape. The LED unit B is detachably attached to the socket 58. In the present embodiment, the socket 58 is configured such that a GX53-type base according to the IEC (International Electrotechnical Commission) standard is detachable.

  The device support 6 is for attaching the LED lighting device A10 to the ceiling C while supporting the device case 5. As shown in FIGS. 1, 2, 4, and 6, the device support 6 includes a third plate portion 61, a plurality of locking plates 62, a bolt member 63, a locking mechanism 64, and a locking member 64. 65.

  The third plate portion 61 is attached to the first plate portion 51 on the surface 511 side of the first plate portion 51. The third plate portion 61 has a main plate portion 611 and a protruding portion 612. The main plate 611 is arranged in parallel with the first plate 51. The main plate portion 611 has a substantially rectangular shape when viewed in the first direction Z, and extends in the radial direction X on opposite sides of the center line Oz. The protruding portion 612 is bent from an edge extending in the longitudinal direction of the main plate portion 611, and protrudes in the first direction Z in the direction in which the back surface 512 faces.

  As shown in FIG. 6, a mounting hole 613 is formed in the center of the main plate portion 611. The mounting hole 613 is a screw hole that passes through the main plate portion 611 in the first direction Z. A mounting bolt 67 inserted from the back surface 512 of the first plate portion 51 is screwed into the mounting hole 613. The mounting bolt 67 is inserted into the device support mounting hole 514 of the first plate portion 51, and the head is pressed against the back surface 512 of the first plate portion 51. Thereby, the third plate portion 61 is attached to the surface 511 of the first plate portion 51. When the LED unit B is removed from the socket 58, the mounting bolt 67 can be operated from the back surface 512 side of the first plate portion 51, and the third plate portion 61 can be moved by loosening the mounting bolt 67. It can be removed from the part 51. In this way, the third plate portion 61 (the device support 6) is detachably attached to the first plate portion 51 (the device case 5).

  Further, a screw hole 614 is formed in the main plate portion 611. The screw hole 614 is located near one end in the longitudinal direction of the main plate portion 611 and penetrates in the first direction Z. The significance of the screw holes 614 will be described later.

  As shown in FIGS. 1, 2, and 6, each of the plurality of locking plates 62 is attached to the third plate portion 61. In the present embodiment, two locking plates 62 are attached to both ends of the third plate 61 in the longitudinal direction. Thus, the plurality (two) of the locking plates 62 are arranged to form a pair on the opposite side with respect to the center line Oz in the first direction Z view.

  As will be described in detail later, at least one of the plurality of locking plates 62 is attached to be movable with respect to the third plate portion 61. Thus, the positions of the plurality of locking plates 62 can be changed. In the present embodiment, of the two locking plates 62 shown in FIG. 2, the left locking plate 62 in the drawing is movable, and the right locking plate 62 in the drawing is a third plate. It is fixed to the portion 61. In the following description, the movable locking plate 62 is appropriately denoted by reference numeral 62A, and the fixed locking plate 62 is appropriately denoted by reference numeral 62B, and these are distinguished from each other as appropriate.

  As shown in FIGS. 1, 2, and 6, each locking plate 62 has a first extension piece 621, a second extension piece 622, a step 623, a folded part 624, and a connection plate part 625.

  The connection plate portion 625 is partially overlapped with the main plate portion 611 (the third plate portion 61). The movable locking plate 62A is attached to the main plate portion 611 so as to be rotatable about an axis O1 passing through a portion where the main plate portion 611 (the third plate portion 61) and the connection plate portion 625 overlap. The axis O1 is along the first direction Z. An arc-shaped groove 626 centering on the axis O1 is formed in the connection plate portion 625 of the locking plate 62A. The arc-shaped groove 626 penetrates the connection plate 625 in the thickness direction (first direction Z). The significance of the arc-shaped groove 626 will be described later. The connection plate portion 625 of the locking plate 62B is fixed to the main plate portion 611 in a state where a part thereof is overlapped with the main plate portion 611.

  The connecting plate portion 625 of the fixed locking plate 62B is also formed with an arc-shaped groove. This is because the locking plates 62A and 62B are formed of the same member for common use of parts. It is. Therefore, the connection plate portion 625 of the fixed locking plate 62B may be configured to have no arc-shaped groove.

  The first extension piece 621 and the second extension piece 622 generally extend in the first direction Z in the direction in which the back surface 512 faces. The first extension piece 621 is bent from the end of the connection plate 625 and extends in the first direction Z. The first extension piece 621 is located closer to the first plate portion 51 than the second extension piece 622 in the first direction Z. The second extending piece 622 is located further away from the first plate portion 51 than the first extending piece 621 in the first direction Z. Further, the second extension piece 622 is at a position closer to the first extension piece 621 in the radial direction X from the center line Oz.

  Both ends in the width direction (circumferential direction around the center line Oz) of the first extension piece 621 are bent portions 621a that are bent so as to approach the center line Oz. The first extension piece 621 has a slit 621b and an opening 621c. The slit 621b extends in the first direction Z, and the opening 621c is connected to the upper end of the slit 621b. The dimension of the opening 621c in the width direction is larger than the dimension of the slit 621b in the width direction.

  The step portion 623 is located between the first extension piece 621 and the second extension piece 622, and is connected to the first extension piece 621 and the second extension piece 622. In the present embodiment, the step portion 623 is inclined so as to be closer to the center line Oz as the rear surface 512 is directed in the first direction Z.

  The folded portion 624 is connected to the end of the second extension piece 622 in the direction in which the back surface 512 faces in the first direction Z, and extends in a direction away from the center line Oz. In the present embodiment, the folded portion 624 extends outward from the lower end of the second extension piece 622 in the radial direction X.

  As shown in FIG. 7, the folded portion 624 has a folded portion front surface 624a and a folded portion rear surface 624b that face in opposite directions in the first direction Z. The folded portion surface 624a is the upper surface of the folded portion 624 illustrated in FIG. 6, and is a surface that faces the direction of the surface 511 in the first direction Z. The folded portion rear surface 624b is a lower surface of the folded portion 624 illustrated in FIG. 6, and is a surface that faces the direction in which the back surface 512 faces in the first direction Z. In a state where the third plate portion 61 (the device support 6) is attached to the first plate portion 51 (the device case 5), the folded back surface 624b is in pressure contact with the packing 59. When the LED lighting device A10 is mounted on the ceiling C, a part of the folded portion 624 is sandwiched between the ceiling C and the flange surface 541 together with a part of the packing 59.

  As shown in FIG. 6, the bolt member 63 is screwed into the screw hole 614 of the main plate portion 611 (the third plate portion 61). Specifically, the bolt member 63 has a screw shaft 631 and a head 632. The screw shaft 631 is inserted into the arc-shaped groove 626 of the connection plate portion 625 of the locking plate 62 </ b> A and screwed into the screw hole 614. I do.

  As described above, the device support 6 has a configuration in which the connection plate portion 625 of the locking plate 62A is rotatable around the axis O1, and the connection plate portion 625 is formed with the arc-shaped groove 626 centered on the axis O1. And a configuration in which the bolt member 63 is inserted into the arc-shaped groove 626. With these configurations, the connection plate portion 625 (the locking plate 62A) is rotatable within an angle range corresponding to the central angle formed by the arc-shaped groove 626.

  8 and 9 are plan views of the device support 6. In these figures, the second plate portion 52 and the mounting hole D are represented by imaginary lines in order to compare the size of the mounting hole D of the second plate portion 52 and the ceiling with the apparatus support 6 in plan view.

  FIG. 8 shows a state in which the bolt member 63 (the screw shaft 631) abuts on one first inner edge 626a in the circumferential direction of the arc-shaped groove 626 of the locking plate 62A. The plurality of locking plates 62 shown in FIG. 8 are in an expanded state, and the second plate portion 52 can be arranged in a space surrounded by the plurality of locking plates 62. The plurality of locking plates 62 shown in FIG. 8 are in the first position according to the present invention.

  In the state shown in FIG. 8, the bolt member 63 (the screw shaft 631) abuts on the first inner edge 626a of the arc-shaped groove 626 of the locking plate 62A. Further, an edge 625 a of the connection plate portion 625 in the locking plate 62 </ b> A illustrated in FIG. 8 abuts on the protrusion 612 of the third plate portion 61. For this reason, with respect to the locking plate 62A in the first posture shown in FIG. 8, the rotation in the direction (clockwise) for further development around the axis O1 is accurately restricted. 6 and 8, when the bolt member 63 screwed into the screw hole 614 is tightened, the locking plate 62A between the main plate portion 611 and the head portion 632 of the bolt member 63 is tightened. The connection plate portion 625 is sandwiched, and the rotation of the locking plate 62A in the closing direction (counterclockwise) around the axis O1 is prevented. Here, the screw hole 614 and the bolt member 63 screwed into the screw hole 614 and inserted into the arc-shaped groove 626 constitute a lock mechanism 64 according to the present invention.

  When the bolt member 63 is loosened from the state shown in FIG. 8 and the locking plate 62A is rotated counterclockwise around the axis O1, the state shown in FIG. 9 is obtained. In FIG. 8, the bolt member 63 (screw shaft 631) is in contact with the other second inner edge 626b in the circumferential direction of the arc-shaped groove 626 of the locking plate 62A.

  The plurality of locking plates 62 shown in FIG. 9 are in a folded state. At this time, the maximum projection length L2 of the first extension piece 621 in the locking plate 62A in the radial direction X is the maximum projection length of the first extension piece 621 in the locking plate 62A in the radial direction X shown in FIG. It is shorter than L1. The plurality of locking plates 62 shown in FIG. 9 are in the second position according to the present invention. When the plurality of locking plates 62 are in the second position, the size of the device support 6 in plan view is smaller than the mounting hole D in the ceiling, and the device support 6 can pass through the mounting hole D.

  In the state shown in FIG. 9, the bolt member 63 (screw shaft 631) abuts on the second inner edge 626b of the arc-shaped groove 626 of the locking plate 62A. Therefore, the rotation of the locking plate 62A in the second position shown in FIG. 9 in the direction in which the locking plate 62A is folded further around the axis O1 (counterclockwise) is restricted. Thereby, the plurality of locking plates 62 can be changed in posture between the first posture shown in FIG. 8 and the second posture shown in FIG.

  As shown in FIG. 1, FIG. 6, FIG. 7, and FIG. 10, the locking member 65 has a base end 651 attached to the first extension piece 621, and a radial direction with respect to the first extension piece 621. Extend outside of X. The locking member 65 shown in these figures is inclined outward from the base end portion 651 toward the distal end portion 652 so as to be directed outward in the radial direction X and toward the back surface 512 in the first direction Z. .

  The locking member 65 is formed by bending a plate member having a predetermined shape. As shown in FIGS. 6, 7, and 10, the base portion 661, the locking convex piece 662, the first spring piece 663, It has a second spring piece 664 and a locking claw 665. The base portion 661 has a U-shaped cross section, and is a portion that is inserted into the slit 621 b of the first extension piece 621. The locking protrusion 662 is a portion that is folded back from the base portion 661 to both outer sides in the width direction, and is a portion of the first extension piece 621 that can abut on the extension piece back surface 621e that faces inward in the radial direction X. . The first spring piece 663 extends from each of the locking projections 662 in the direction in which the front surface 511 faces in the first direction Z, and is a portion that can come into contact with the extension piece back surface 621e. The second spring piece 664 extends from both outer sides in the width direction of the base portion 661 in the direction in which the surface 511 faces in the first direction Z, and extends from the first extension piece 621 outward in the radial direction X. This is a portion that can contact the surface 621d. The locking claws 665 extend from both outer sides in the width direction of the base portion 661 in a direction in which the back surface 512 faces in the first direction Z, and are portions that can contact the upper surface of the ceiling C.

  In the locking member 65 shown in FIGS. 7 and 10, the base portion 661 is inserted into the slit 621b, and the first extension piece 621 is extended by the first spring piece 663 and the second spring piece 664. The extension piece surface 621d is sandwiched from both sides. Thereby, the locking member 65 is maintained in the above-described inclined state. The locking member 65 shown in FIGS. 7 and 10 is in the first position according to the present invention.

  In the state shown in FIG. 10, when a force is applied to the distal end portion 652 in the direction in which the surface 511 faces in the first direction Z (upward in the drawing), the distal end portion 652 is rotated about the base end portion 651 side as a rotation center and locked The convex piece 662 contacts the extended piece back surface 621e (see FIG. 11). At this time, the rotation of the locking member 65 is restricted. Here, when a force (see the arrow F in FIG. 11) is applied to the distal end 652 in the first direction Z in the direction in which the surface 511 faces, the first extension piece 621 has the base end 651 side as the center of rotation. A moment (see the arrow M in FIG. 11) acts in the direction in which the surface 511 faces.

  In the state shown in FIG. 10, when a force is applied to the base end 651 in the first direction Z in the direction in which the surface 511 faces (upward in the figure), the locking member 65 slides along the slit 621b. Let me do. Then, when reaching the position facing the opening 621c, as shown in FIG. 12, a part of the first spring piece 663 faces the outside of the opening 621c. In the first direction Z, it is located closer to the direction in which the surface 511 faces (upward in the figure), and extends substantially along the first direction Z from the base end 651 to the tip 652. The locking member 65 shown in FIG. 12 is in the second position according to the present invention.

  As shown in FIGS. 1 to 4, the terminal block 81 is electrically connected to the LED unit B via the conduction cable 88 and the socket 58, and is connected to an external power supply cable 89 to supply power to the LED unit B. Such a component. The terminal block 81 is not housed in the device case 5 and is exposed outside the device case 5. The terminal block 81 is located between the pair of locking plates 62 in the longitudinal direction of the third plate portion 61, and the longitudinal direction of the terminal block 81 is between the first direction Z and the longitudinal direction of the third plate portion 61. Each of them is arranged along a radial direction X which is a right angle. Note that the terminal block 81 is disposed in a state where its longitudinal direction is inclined at a predetermined angle with respect to the radial direction X which is perpendicular to both the first direction Z and the longitudinal direction of the third plate portion 61. Is also good. The power supply cable 89 is configured to be connected to the terminal block 81 from the outside to the inside in the radial direction X that is perpendicular to both the first direction Z and the longitudinal direction of the third plate portion 61. I have. The terminal block 81 according to the present embodiment is arranged in a state where the terminal block 81 is entirely separated from the surface 511 in the first direction Z view. Here, the terminal block 81 is in a state where a part thereof protrudes from the surface 511 in the first direction Z view, in other words, in a state where a part of the terminal block 81 overlaps the surface 511 in the first direction Z view. It may be arranged.

  The terminal block support 82 is a plate member fixed to the front surface 511 and supporting the terminal block 81, as shown in FIGS. The terminal block support 82 has a support fixing portion 821 and a terminal block support 822.

  As shown in FIGS. 2 and 4, the support fixing portion 821 is a portion fixed to the front surface 511. As shown in FIG. 13, the support fixing portion 821 is formed with a support insertion hole 821a penetrating in the first direction Z. The support fastening member 823 shown in FIGS. 2 and 4 communicates with the support insertion hole 821 a and the support fixing hole 515 formed in the first plate portion 51. The terminal block support 82 is fixed to the front surface 511 by the support fastening member 823. The support fastening member 823 is, for example, a bolt. In addition, the support fixing portion 821 illustrated in FIGS. 13 and 14 is formed with a support protrusion 821b that protrudes in the direction in which the back surface 512 faces in the first direction Z. The shape of the support protrusion 821b in the first direction Z is circular. In the present embodiment, the support projection 821b is engaged with a support engagement hole 516 formed in the first plate portion 51.

  As shown in FIGS. 2 and 4, the terminal block supporting portion 822 is a portion that is connected to the support fixing portion 821 and supports the terminal block 81. The terminal block support portion 822 has a support portion front surface 822a and a support portion back surface 822b that face each other in the first direction Z. The support portion surface 822a is the upper surface of the terminal block support portion 822 shown in FIG. 4, and is a surface that faces the direction in which the surface 511 faces in the first direction Z. The support portion back surface 822b is a lower surface of the terminal block support portion 822 illustrated in FIG. 4 and is a surface that faces the direction in which the back surface 512 faces in the first direction Z. In the present embodiment, the terminal block 81 is supported by the support portion back surface 822b. In this case, the terminal block 81 is configured such that a part thereof is located on the back surface 512 side with respect to the first plate portion 51 in the first direction Z. As shown in FIG. 13, a pair of terminal block support holes 822 c and a terminal block engagement hole 822 d penetrating in the first direction Z are formed in the terminal block support portion 822. In the present embodiment, the terminal block engaging hole 822d is located between the pair of terminal block supporting holes 822c. The pair of terminal block support holes 822c and the terminal block engagement holes 822d are holes used for supporting the terminal block 81 on the terminal block support portion 822. In the present embodiment, the diameter of the terminal block support hole 822c is longer than the diameter of the terminal block engagement hole 822d. Note that the terminal block support 822 is configured using, for example, a spring material. This is to make it easier for the terminal block supporting portion 822 and the terminal block 81 supported by the terminal block supporting portion 822 to pass through the mounting hole D of the ceiling C when the LED lighting device A10 is mounted on the ceiling C.

  Next, a specific configuration of the LED unit B configuring the LED lighting device A10 will be described with reference to FIGS. The LED unit B of the present embodiment includes a case 1, an LED light emitting unit 2, a cover 3, and a power supply unit 4. In the present embodiment, the LED unit B has a substantially cylindrical shape whose height is relatively low, and the shape of the LED unit B in a plan view is a circular shape.

  FIG. 15 is a plan view of the LED unit B. FIG. 16 is a side view of the LED unit B. FIG. 17 is a bottom view of the LED unit B. FIG. 18 is a sectional view taken along the line XVIII-XVIII in FIG.

  The case 1 houses or holds the LED light emitting unit 2, the cover 3, and the power supply unit 4. In the present embodiment, the case 1 includes a heat radiating member 11, an insulating member 12, and an intermediate bracket 15. In the present embodiment, the case 1 has a circular shape in plan view.

  The heat dissipating member 11 is a member intended to dissipate heat from the LED light emitting unit 2 and is made of, for example, a metal such as aluminum. The heat radiating member 11 has a mounting surface 111, a plurality of fins 112, and an engaging portion 113. The mounting surface 111 is oriented in an emission direction (upward in the drawing in FIG. 18) for emitting light from the LED light emitting unit 2 and is a substantially circular plane. The plurality of fins 112 are for promoting heat dissipation from the LED light emitting unit 2, and are provided over the entire outer peripheral portion of the heat radiating member 11. The fins 112 are parallel to the axial direction and the radial direction of the LED unit B. The engagement portion 113 is an annular portion surrounding the mounting surface 111. The engaging portion 113 is used for attaching the cover 3.

  The insulating member 12 is attached to the heat radiating member 11 on the side opposite to the emission direction, and the shape of the insulating member 12 in a plan view is circular. The insulating member 12 is made of an insulating material, and in this embodiment, is made of, for example, polybutylene terephthalate (PBT) resin. The insulating member 12 has a protrusion 121. The convex portion 121 is a columnar portion that protrudes on the side opposite to the emission direction. As shown in FIG. 16, a groove 122 is formed in the protrusion 121. The groove portion 122 has a portion extending in the axial direction and a portion extending in the circumferential direction following the portion. The insulating member 12 is provided with two pins 13. The two pins 13 are located on opposite sides in the radial direction with the protrusion 121 interposed therebetween, and protrude on the opposite side to the emission direction. The protrusion 14 and the two pins 13 form a base 14. The base 14 is for connecting the LED unit B to the socket 58 described above, and in the present embodiment is of the IEC standard type GX53. When the LED unit B is connected to the socket 58, the two pins 13 engage with the socket 58.

  The intermediate bracket 15 is provided between the heat radiating member 11 and the insulating member 12. The intermediate bracket 15 is made of an insulating material, and in this embodiment, is made of, for example, polybutylene terephthalate (PBT) resin. The intermediate bracket 15 has a function of fixing and holding the two pins 13 and the power supply unit 4 and holding wiring connecting the two pins 13 and the LED light emitting unit 2 and the power supply unit 4.

  The LED light emitting unit 2 is a part that forms a light source of the LED unit B. As shown in FIGS. 19 to 21, the LED light emitting unit 2 includes an LED substrate 21, a plurality of LED chips 22, a sealing resin 24, a dam 25, and a holder 26. FIG. 19 is a plan view of the LED light emitting unit 2 of the LED unit B. FIG. 20 is a sectional view taken along the line XX-XX in FIG. FIG. 21 is an enlarged plan view of a main part of the LED light emitting unit 2 shown in FIG. 19, and a sealing resin 24 and a holder 26 described later are omitted for convenience of understanding.

  As shown in FIG. 19, the LED substrate 21 has, for example, a rectangular shape in plan view, and has a plurality of LED chips 22 mounted thereon. Although the configuration of the LED substrate 21 is not particularly limited, the LED substrate 21 has a base 211 and a wiring pattern 212 in the present embodiment. The planar size of the LED board 21 is, for example, 12 × 15 mm.

  The base material 211 is made of an insulating material, and is made of glass epoxy resin or ceramics having an increased thermal conductivity. The wiring pattern 212 mounts the plurality of LED chips 22 and forms a conduction path to these LED chips 22. The wiring pattern 212 is made of a metal plating layer, for example, Cu, Ni, Au, or Ag. In the present embodiment, the wiring pattern 212 has a bonding pad for mounting 26 LED chips 22 and two connection pads for establishing electrical connection with the holder 26. The two connection pads are rectangular portions that are arranged in the diagonal direction of the LED substrate 21 with the plurality of LED chips 22 therebetween in FIG.

  The plurality of LED chips 22 are light emitting elements of the LED light emitting unit 2. The LED chip 22 has a semiconductor layer made of, for example, GaN, and emits, for example, blue light. In the present embodiment, 26 LED chips 22 are mounted on the LED board 21. These LED chips 22 are arranged substantially in a matrix. The LED chip 22 is a so-called two-wire type LED chip. In the present embodiment, adjacent LED chips 22 are directly connected by wires 23. Further, in the present embodiment, all the LED chips 22 are connected to each other in series. These LED chips 22 are directly connected between the two connection pads of the wiring pattern 212. The arrangement pitch of the plurality of LED chips 22 is, for example, 1.0 to 1.7 mm.

  The weir 25 is formed on the LED substrate 21 and may surround the plurality of LED chips 22. In the present embodiment, the weir portion 25 has a rectangular ring shape in plan view, and is made of, for example, a white epoxy resin. The height of the weir 25 is higher than the LED chip 22.

  The sealing resin 24 covers the plurality of LED chips 22 and fills a region surrounded by the weir 25. The sealing resin 24 is made of a transparent resin such as silicone resin or epoxy resin mixed with a fluorescent material. This fluorescent material emits yellow light when excited by blue light from the LED chip 22. Further, a fluorescent material that emits red light and a fluorescent material that emits green light by being excited by the blue light from the LED chip 22 may be used as a mixture. As a result, the LED light emitting section 2 emits white light such as bulb color or daylight color.

  The holder 26 is for fixing and holding the LED board 21 to the mounting surface 111 of the heat radiation member 11. The holder 26 has a main body 261 and two holding electrodes 262. The main body 261 is made of, for example, an insulating resin, and has a larger dimension in plan view than the LED board 21 as shown in FIGS. 19 and 20. Further, the main body 261 has an opening at the center so that the sealing resin 24 covering the LED chips 22 is exposed. The two holding electrodes 262 are in contact with the two connection pads of the wiring pattern 212 of the LED board 21, respectively. The two holding electrodes 262 are electrically connected to the power supply unit 4 via the LED cable 48. The attachment of the holder 26 to the heat radiating member 11 is performed by screws or fitting.

  The cover 3 is attached to the case 1 so as to be located in the emission direction. The cover 3 transmits light from the LED light emitting unit 2. In the present embodiment, the cover 3 transmits the light from the LED light emitting unit 2 while diffusing the light. Examples of the material of the cover 3 include a material in which a diffusing material is mixed into a resin or glass having a light transmitting property. With such a configuration, the cover 3 has a milky white color, for example.

  The cover 3 has a circular shape in plan view, and has an inner surface 310, an outer surface 320, a side surface 340, and the engaging portion 32.

  The inner surface 310 is located on the LED light emitting unit 2 side, and faces the mounting surface 111 of the heat radiating member 11 of the case 1. The shape of the inner surface 310 in plan view is circular. The inner surface 310 according to the present embodiment is roughened.

  The outer surface 320 is located on the opposite side to the inner surface 310, and the shape of the outer surface 320 in plan view is circular. The outer surface 320 according to the present embodiment has a shape that bulges out on the side (upper side in FIG. 18) away from the LED light emitting unit 2. The outer surface 320 according to the present embodiment has a smooth mirror finish.

  The side surface 340 is a curved surface having a circular cross section along the direction in which the inner surface 310 and the outer surface 320 are separated from each other. The engaging portion 32 is provided on the outer peripheral end of the cover 3, and functions to attach the cover 3 to the case 1 by engaging with the heat radiating member 113 of the case 1.

  In addition, the shape of the cover 3 according to the present embodiment is intended to diffuse the light emitted from the LED light emitting unit 2 without bias, and the shape of the cover 3 may take various other shapes. it can.

  The power supply unit 4 converts, for example, commercial 100 V AC power into DC power suitable for lighting the plurality of LED chips 22 of the LED light emitting unit 2. The power supply unit 4 is housed in the protrusion 121 of the insulating member 12.

  The power supply unit 4 of the present embodiment includes a power supply board 41 and a plurality of electronic components 42.

  The power supply board 41 serves as a base of the power supply unit 4 and supports a plurality of electronic components 42. In addition, it has a conduction path for appropriately conducting the plurality of electronic components 42.

  The plurality of electronic components 42 are elements constituting a power supply circuit for realizing the function of the power supply unit 4. The types and specifications of the plurality of electronic components 42 are not particularly limited, but typical examples include a transformer, a capacitor, a resistor, and a diode.

  An LED cable 48 and a power cable 49 are connected to the power supply unit 4. The LED cable 48 supplies electric power from the power supply unit 4 to the LED light emitting unit 2, and is connected to the power supply unit 4 and the LED light emitting unit 2. The power cable 49 guides electric power received from the outside to the power unit 4, and is connected to the power unit 4 and the pins 13 of the case 1.

  Next, the operation of the LED lighting device A10 will be described.

  As described with reference to FIG. 6 and the like, in the LED lighting device A10, the LED unit B is detachably attached to the first plate portion 51 on the back surface 512 side, and the LED unit B faces the opposite side to the back surface 512. The device support 6 is detachably attached to the front surface 511 of the one plate portion 51. The device support 6 includes a plurality of locking plates 62 extending in the direction in which the back surface 512 faces in the first direction Z, and each locking plate 62 has a first extension piece 621 and a second extension piece 622. . The first extension piece 621 is located closer to the first plate portion 51 in the first direction Z. The second extension piece 622 is located farther from the first plate portion 51 than the first extension piece 621 in the first direction Z, and extends from the center line Oz in the radial direction X with respect to the center line Oz of the device support 6. It is at a position closer than the one extension piece 621.

  As described with reference to FIGS. 8 and 9, the positions of the plurality of locking plates 62 can be changed between the first position and the second position. When the plurality of locking plates 62 are in the first position, the locking plates 62 are in an expanded state, and the second plate portion 52 is located in a space surrounded by the locking plates 62 in the first direction Z. Can be arranged. When the plurality of locking plates 62 are in the second position, the locking plates 62 are in a folded state, and the maximum protruding length of the first extending piece 621 in the movable locking plate 62A in the radial direction X is set. The length L2 is shorter than the maximum protruding length L1 in the radial direction X of the first extension piece 621 in the first posture.

  According to such a configuration, when the LED lighting device A10 is mounted on the ceiling C, the device support 6 is removed from the device case 5, and the plurality of locking plates 62 are compactly folded in the second posture. , The first extension pieces 621 of the device support 6 are passed through the mounting holes D provided in the ceiling C. Then, by rotating the movable locking plate 62 about the axis O1, the plurality of locking plates 62 are brought into the deployed first position. At this time, as is clear from FIGS. 6 and 8, the distance in the radial direction X from the center line Oz of each first extension piece 621 of the plurality of locking plates 62 is larger than the radius of the mounting hole D. The first extension piece 621 is located at a position protruding outside the mounting hole D when viewed in the first direction Z. By connecting the device support 6 having the first posture to the plurality of locking plates 62 and the device case 5 and mounting the LED unit B on the device case 5, the mounting of the LED lighting device A10 on the ceiling is completed. .

  Unlike the present embodiment, when the LED lighting device according to the comparative example is mounted on a ceiling, for example, a support piece 6 ′ is used as shown in FIG. One end 68 'of the support piece 6' is fixed to the side surface of the second plate portion 52 'in the device case 5', and extends vertically downward along the side surface. The support piece 6 ′ extending vertically downward is bent near the flange 54 ′ and exposed to the side (radially outward of the device case 5 ′). When the LED lighting device A10 'according to the present comparative example is mounted on the ceiling C, the bent portion 69' of the support piece 6 'is housed in a state of being protruded inside the mounting hole D of the ceiling C. In such a configuration, the diameter of the mounting hole D provided in the ceiling C is such that, in addition to the outer diameter of the device case 5 ′, the bent portion 69 ′ of the support piece 6 ′ projects inside the mounting hole D. Must be of the required length to accommodate. On the other hand, in the LED lighting device A10 of the present embodiment, the plurality of locking plates 62 of the device support 6 can be changed in posture. At the time of mounting in the mounting hole D of the ceiling C, a plurality of locking plates 62 are folded to take a compact second posture, so that the diameter of the mounting hole D of the ceiling C with respect to the outer diameter of the device case 5 is reduced. It can be set shorter. Therefore, according to the LED lighting device A10, it can be more compactly attached to the ceiling C.

  When the LED lighting device A10 ′ according to the comparative example shown in FIG. 22 is attached to or detached from the ceiling C, the LED lighting device A10 ′ is suspended from the ceiling C, D is pushed behind and is moved up and down between the buried mounting state. At this time, the support piece 6 ′ that protrudes laterally comes into sliding contact with the inner surface of the mounting hole D of the ceiling C, and as a result, the inner surface of the mounting hole D is cut or the mounting hole D is cut off. For this reason, there is a possibility that the LED lighting device A10 'hangs down from its original mounting state. On the other hand, in the LED lighting device A10 of the present embodiment, when the plurality of locking plates 62 are in the first posture, each of the first extension members at the position protruding outside the mounting hole D when viewed in the first direction Z. The entire LED lighting device A10 including the device support 6 is supported by the ceiling C by the contact of the projecting piece 621 or a portion connected therebelow (in the present embodiment, the step portion 623) with the upper surface of the ceiling C. According to such a configuration, each part of the device support 6 does not slidably contact the inner surface of the mounting hole D, and it is possible to appropriately avoid inconvenience such as scraping of the inner surface of the mounting hole D.

  The postures of the plurality of locking plates 62 in the device support 6 are changed between the first posture and the second posture by rotating the movable locking plate 62A about the axis O1 along the first direction Z. The axis O1 passes through a portion where the main plate portion 611 of the third plate portion 61 and the connection plate portion 625 of the locking plate 62 overlap, and the connection plate portion 625 has an arc-shaped groove 626 centered on the axis O1. The main plate portion 611 is provided with a bolt member 63 as a protrusion inserted into the arc-shaped groove 626. The plurality of locking plates 62 take the first position when the first inner edge 626a on one circumferential side of the arc-shaped groove 626 abuts on the bolt member 63 (projection), and the plurality of locking plates 62 The second posture is taken when the other second inner edge 626b in the circumferential direction comes into contact with the bolt member 63. According to such a configuration, when the plurality of locking plates 62 are in the deployed first position, the dimensions of the locking plates 62 from the center line Oz can be accurately defined.

  The device case 5 to which the LED unit B is attached is substantially supported by the third plate portion 61 of the device support 6. The third plate portion 61 has a protruding portion 612 that is bent from an edge of the main plate portion 611 and protrudes in a direction of the back surface 512 in the first direction Z. According to such a configuration, it is suitable for increasing the rigidity of the third plate portion 61 to which the load of the device case 5 and the LED unit B is applied.

  When the plurality of locking plates 62 take the first posture, the edge 625a of the connection plate portion 625 of the locking plate 62A rotatable around the axis contacts the protruding portion 612 of the third plate portion 61. According to such a configuration, when the plurality of locking plates 62 are in the deployed first position, the dimensions of the locking plates 62 from the center line Oz can be more accurately defined.

  The device support 6 includes a lock mechanism 64 that prevents the rotation of the locking plates 62A when the locking plates 62 are in the first position. According to such a configuration, it is possible to prevent the plurality of locking plates 62 from being easily changed from the first posture. Therefore, the attachment state of the LED lighting device A10 attached to the attachment hole D of the ceiling C can be appropriately maintained.

  The device support 6 includes a locking member 65 in which a base end 651 is attached to the first extension piece 621. The locking member 65 has a first position inclined so as to spread outward in the radial direction X from the base end portion 651 to the distal end portion 652 as shown in FIG. 10, and a first position as shown in FIG. 12. It is displaceable so as to take a second position located closer to the direction in which the surface 511 faces in the first direction Z than when it is taken. When the locking member 65 assumes the first position, as shown in FIG. 11, when a force is applied to the tip 652 in the direction in which the surface 511 faces in the first direction Z, the first extension piece 621 is A moment acts in a direction in which the surface 511 faces with the base end 651 side as a rotation center. According to such a configuration, when the LED lighting device A10 is mounted in the mounting hole D of the ceiling C, the mounting state of the LED lighting device A10 is changed by receiving the reaction force from the upper surface of the ceiling C. More stable.

  When attaching or detaching the device support 6 to or from the mounting hole D of the ceiling C, the base end 651 is pushed up to cause the locking member 65 to assume the second position, so that the entire device support 6 is Can be made compact. Therefore, attachment or detachment of the device support 6 from the attachment hole D can be easily performed.

  Regarding the disposition of the terminal block 81, the terminal block 81 is supported on the back surface 822b of the support portion of the terminal block support portion 822, and a part of the terminal block 81 is positioned on the back surface 512 side with respect to the first plate portion 51 in the first direction Z. With this arrangement, the size of the LED lighting device A10 in the first direction Z can be reduced. Further, by providing the device case 5 having the tapered portion 53 interposed between the first plate portion 51 and the second plate portion 52, the terminal block 81 can be brought closer to the center of the device case 5 in the first direction Z. Therefore, the size of the LED lighting device A10 in the direction perpendicular to the first direction Z can be reduced.

  The collar portion 54 functions as a stopper for preventing the LED lighting device A10 from being excessively buried behind the ceiling C when the LED lighting device A10 is attached to the ceiling C. Further, the packing 59 has an effect of preventing the flange 54 from contacting the ceiling C when the LED lighting device A10 is attached to the ceiling C, and preventing the ceiling C from being damaged.

  The LED lighting device according to the present invention is not limited to the embodiment described above. The specific configuration of each part of the LED lighting device according to the present invention can be variously changed in design.

  In the above embodiment, the case where the device support 6 is attached to the first plate portion 51 of the device case 5 has been described, but the present invention is not limited to this. The device support 6 may be configured to be attached to another portion such as the second plate portion 52 or the tapered portion 53 of the device case 5.

  In the above-described embodiment, the locking plate 62A that is movable in the apparatus support is rotatable around the axis O1, but instead the locking plate 62A can be slidably moved (reciprocally linearly movable). The configuration may be such that FIG. 23 and FIG. 24 show an example of such a device support. In the device support 6 shown in FIG. 23, a linear guide groove 627 is formed in the connection plate 625 of the movable locking plate 62A. The guide groove 627 extends straight along the longitudinal direction of the main plate portion 611. The guide groove 627 penetrates the connecting plate 625 in the thickness direction (first direction Z). In the configuration shown in FIGS. 23 and 24, the third plate portion 61 has a pair of projecting portions 612 connected to both end edges of the main plate portion 611 extending in the longitudinal direction. Each of the pair of protrusions 612 has, for example, an L-shaped cross section. The protrusions 612 lock both ends 625b, 625b in the width direction of the connection plate 625. The bolt member 63 is screwed into a screw hole 614 formed in the main plate portion 611. The bolt member 63 is inserted into the guide groove 627. According to the configuration shown in FIGS. 23 and 24, the locking plate is slidable along the guide groove 627 in the left-right direction in FIG. In the state shown in FIG. 23, the locking plate 62 is located at a position closer to the left end in the slidable range, and has the first posture according to the present invention. When the bolt member 63 screwed into the screw hole 614 is tightened, the connection plate portion 625 of the locking plate 62A is sandwiched between the main plate portion 611 and the head portion 632 of the bolt member 63, and the locking plate 62A Movement is blocked.

  Further, the number of the locking plates 62 constituting the device support 6 is not limited to two as shown in the above embodiment, and a configuration having three or more locking plates may be adopted. Further, a configuration in which a plurality of movable locking plates are provided may be employed.

A10 LED lighting device B LED unit 1 Case 11 Heat radiating member 111 Mounting surface 112 Fin 113 Engaging part 12 Insulating member 121 Convex part 122 Groove part 13 Pin 14 Base 15 Intermediate bracket 2 LED light emitting part 21 LED substrate 211 Base material 212 Wiring pattern 22 LED chip 23 Wire 24 Sealing resin 25 Weir portion 26 Holder 261 Main body 262 Holding electrode 3 Cover 310 Inner surface 320 Outer surface 340 Side surface 32 Engagement unit 4 Power supply unit 41 Power supply board 42 Electronic component 48 LED cable 49 Power supply cable 5 Device case 51 first plate portion 511 front surface 512 back surface 513 socket fixing hole 514 device supporter mounting hole 515 supporter fixing hole 516 supporter engaging hole 517 cable insertion hole 52 second plate portion 521 opening 53 taper portion 54 flange portion 541 flange Part surface 542 Flange back 57 Fastening bolt 58 Socket 59 Packing 6 Device support 61 Third plate portion 611 Main plate portion 612 Projecting portion 613 Mounting hole 614 Screw hole 62, 62A, 62B Locking plate 621 First extension piece 621a Bent portion 621b Slit 621c Opening 621d Extension Projection piece surface 621e Extension piece back surface 622 Second extension piece 623 Stepped portion 624 Folded portion 624a Folded portion surface 624b Folded portion back surface 625 Connection plate portion 625a Edge 626 Arc-shaped groove 626a First inner edge 626b Second inner edge Part 63 bolt member 631 screw shaft 632 head 64 locking mechanism 65 locking member 651 base end 652 tip 661 base 662 locking projection 663 first spring piece 664 second spring piece 665 locking claw 67 mounting bolt 81 Terminal block 82 Terminal block support 821 Support fixing section 821a Support insertion hole 821b Supporting protrusion 822 Terminal block supporting portion 822a Supporting portion front surface 822b Supporting portion back surface 822c Terminal block supporting hole 822d Terminal block engaging hole 823 Supporting member fastening member 88 Conducting cable 89 Power supply cable X Radial direction Z First direction C Ceiling D Mounting Hole F, M Arrow O1 Axis Oz Center line

Claims (32)

A first plate portion having a front surface and a back surface facing each other in a first direction, and the first plate portion surrounding the first plate portion in the first direction, and the back surface in the first direction with respect to the first plate portion; A device case having a second plate portion extending in a direction in which
An LED unit detachably attached to the back surface side with respect to the first plate portion;
A device support that is detachably attached to the device case,
The device support body includes a plurality of locking plates each extending in a direction in which the back surface faces in the first direction,
Each of the locking plates is a first extension piece located closer to the first plate portion in the first direction, and is further away from the first plate portion in the first direction than the first extension piece. And a second extension piece located closer to the center line than the first extension piece in a radial direction with respect to a center line of the device support body extending along the first direction,
The plurality of locking plates are at least one of a first position in which the second plate portion can be arranged in a space surrounded by the plurality of locking plates in the first direction, and the plurality of locking plates. An LED lighting device capable of changing its posture between a second posture in which a maximum protruding length in the radial direction of the first extension piece is shorter than in the first posture.   The LED lighting device according to claim 1, wherein the device support has a third plate portion to which the locking plates are attached.   3. The LED lighting device according to claim 2, wherein each of the locking plates has a connection plate part that partially overlaps the third plate part. 4.   The LED lighting device according to claim 3, wherein at least one of the plurality of locking plates is rotatable around an axis along the first direction.   The LED lighting device according to claim 4, wherein the axis passes through a portion where the third plate portion and the connection plate portion overlap each other.   6. An arc-shaped groove centering on the axis is formed on one of the connection plate portion and the third plate portion, and a projection inserted into the arc-shaped groove is provided on the other. The LED lighting device according to claim 1.   The plurality of locking plates take the first posture when the first inner edge portion in the circumferential direction of the arc-shaped groove comes into contact with the protrusion, and the second plate on the other side in the circumferential direction of the arc-shaped groove. The LED lighting device according to claim 6, wherein the second posture is taken when an inner edge portion and the protrusion come into contact with each other.   The third plate portion is disposed in parallel with the first plate portion, and has a main plate portion having a portion overlapping with the connection plate portion of each of the locking plates, and a third plate portion bent from an edge of the main plate portion to form the third plate portion. The LED lighting device according to claim 7, further comprising: a protruding portion that protrudes in a direction in which the back surface faces in one direction.   The edge of the connection plate part in the locking plate rotatable around the axis when the plurality of locking plates take the first posture, the edge of the connection plate portion abuts on the protrusion. LED lighting device.   10. The apparatus according to claim 6, wherein the device support body includes a lock mechanism that prevents rotation of the locking plate that is rotatable around the axis when the plurality of locking plates take the first posture. An LED lighting device according to any one of claims 1 to 3.   The lock mechanism has a screw hole formed in the other of the connection plate portion and the third plate portion, a screw shaft screwed into the screw hole, and a head connected to one end of the screw shaft. The LED lighting device according to claim 10, wherein the screw shaft includes a bolt member that is the protrusion.   The device support has a base end movably attached to the first extension piece in the first direction and extends radially outward with respect to the first extension piece. The LED lighting device according to any one of claims 1 to 11, further comprising a locking member that projects.   A first position in which the locking member is inclined outward from the base end toward the distal end in the radial direction and toward the direction in which the back surface faces in the first direction; and the base end. Is located closer to the direction in which the surface faces in the first direction than the first position, and extends from the proximal end to the distal end substantially along the first direction. 13. The LED lighting device according to claim 12, wherein the LED lighting device is displaceable.   When the locking member is in the first position, when a force is applied to the distal end in a direction in which the surface faces in the first direction, the base portion side is attached to the first extension piece. The LED lighting device according to claim 13, wherein a moment in a direction in which the surface faces acts as a rotation center.   15. The LED lighting device according to claim 1, wherein each of the locking plates has a step portion connected to the first extension piece and the second extension piece. 16.   16. The locking plate according to claim 1, wherein each of the locking plates has a folded portion that is connected to the back surface side in the first direction with respect to the second extension piece and extends in a direction away from the center line. LED lighting device.   The LED lighting device according to any one of claims 1 to 16, wherein the plurality of locking plates are arranged so as to form a pair on opposite sides of the center line in the first direction.   The LED according to claim 17, further comprising: a terminal block that is electrically connected to the LED unit and is connected to an external power supply cable; and a terminal block support fixed to the surface and supporting the terminal block. Lighting equipment.   19. The LED lighting device according to claim 18, wherein the terminal block is located between the pair of locking plates in a direction in which the pair of locking plates are separated.   20. The LED lighting device according to claim 19, wherein the power supply cable is connected to the terminal block from the outside in the radial direction to the inside.   The LED lighting device according to any one of claims 18 to 20, wherein the terminal block is disposed so as to be entirely separated from the surface when viewed in the first direction.   The LED lighting device according to any one of claims 18 to 20, wherein the terminal block is disposed in a state where a part thereof protrudes from the surface when viewed in the first direction.   22. The LED according to claim 21, wherein the terminal block support has a support fixing portion fixed to the surface, and a terminal block support portion connected to the support fixing portion and supporting the terminal block. Lighting equipment.   24. The LED lighting device according to claim 23, wherein the terminal block support section has a support section rear surface facing in the same direction as the rear surface, and the terminal block is supported by the support section rear surface.   The LED lighting device according to claim 24, wherein a part of the terminal block is located on the back surface side with respect to the first plate portion in the first direction. A support projection is formed on the support fixing portion, the support protrusion protruding in a direction in which the back surface faces in the first direction,
The LED lighting device according to any one of claims 23 to 25, wherein the support projection is engaged with a support engagement hole formed in the first plate portion.   The device case is interposed between the first plate portion and the second plate portion, and a cross section of the device case in the first direction as going from the first plate portion to the second plate portion. The LED lighting device according to any one of claims 23 to 26, further comprising a tapered portion inclined so that a diameter of the LED lighting device becomes longer. A socket fixed to the back surface and electrically connected to the terminal block,
The LED lighting device according to any one of claims 18 to 27, wherein the LED unit is detachably attached to the socket. The device case has an opening configured by an edge of the second plate portion facing the direction in which the back surface faces in the first direction,
The LED lighting device according to any one of claims 1 to 28, wherein the shape of the opening in the first direction is a circular shape.   30. The LED lighting device according to claim 29, wherein the device case has an annular flange formed along the opening and extending in a direction perpendicular to the first direction.   31. The LED lighting device according to claim 30, wherein the flange has a flange surface facing the surface of the first direction, and an annular packing is disposed on the flange surface.   The LED lighting device according to any one of claims 29 to 31, wherein a shape of the LED unit as viewed in the first direction is a circular shape.

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