JP2009295544A - Lighting-up device and embedded illuminating fixture having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure, capable of easily inserting a lighting-up device 3 into a ceiling embedded hole 22 in case that a space (distance) between a ceiling material 20 and a structure 21 is narrow, and to enlarge an area of an embedded circuit board 10. <P>SOLUTION: The lighting-up device 3, which builds in the circuit board 10 for lighting up a light source 5, has: a rectangular parallelepiped section 11 wherein a base 3b is an approximate square; an inclined top face 24, projecting by extending from the rectangular parallelepiped section 11 and inclined toward the base 3b from a top face of the rectangular parallelepiped section 11; and a projection 12 made of an inclined side face 25 narrowing in a center direction as it projects from a side face of the rectangular parallelepiped section 11. Thus, the lighting-up device can be easily mounted, even when the space (distance) between the ceiling material 10 and the structure 21 is narrow, and the area of the embedded circuit board 10 can be enlarged. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure of a lighting device for an embedded lighting device.

  There is a technique in which the outer shape of a lighting device that turns on a light source has a polygonal shape (see, for example, Patent Document 1 and Patent Document 2).

JP-A-10-275514 (paragraphs “0054” to “0059”, FIG. 20) JP 2006-331857 A (paragraph “0036”, FIG. 1)

  However, in a lighting fixture in which a lighting fixture lamp and a lighting device are integrated, it is required to widen the space (distance) between the ceiling material and the structure when the lighting device is inserted into the ceiling embedding hole and the lighting fixture is attached. It was.

  Further, when the outer dimensions of the lighting device are reduced, there is a problem that the area of the circuit board built in the lighting device is reduced and the electronic components are concentrated.

  The present invention provides, for example, a structure in which the lighting device can be easily inserted into the ceiling embedding hole even when the space (distance) between the ceiling material and the structure is narrow, and the area of the built-in circuit board is reduced. The purpose is to enlarge.

  A lighting device according to the present invention includes a rectangular parallelepiped portion having a substantially rectangular bottom surface, an inclined top surface that extends from the rectangular parallelepiped portion and protrudes from the top surface of the rectangular parallelepiped portion toward the bottom surface, and a side surface of the rectangular parallelepiped portion. And a projecting portion having an inclined side surface that narrows in the central direction as it projects.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where the space (distance) of a ceiling material and a structure is narrow, while being able to attach easily, the area of the circuit board incorporated can be enlarged.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing the lighting fixture of the present embodiment, FIG. 2 is an exploded perspective view of the lighting fixture of FIG. 1, and FIG. 3 is a side view of the lighting device.

  The luminaire 1 includes a lamp 2, a lighting device 3, and a connection tool 4 that connects the lamp 2 and the lighting device 3.

  The lamp 2 has a substantially cylindrical shape, a lamp body 6 having a light source 5 (not shown) built therein, a mounting spring 7, and heat radiation that radiates heat generated when the built-in light source 5 is lit to the outside air. Fins 8 are provided.

  The lighting device 3 includes a lighting device case main body 9, a circuit board 10 (lighting circuit) attached to the lighting device case main body 9, a rectangular parallelepiped portion 11 and a protruding portion 12, and the lighting device case main body covers the circuit board 10. A lighting device case cover 13 attached to the lighting device 9, a mounting base 14 attached to the lighting device case main body 9, and a power supply terminal base 15 attached to the mounting base 14.

  The lighting device case main body 9, the lighting device case cover 13, the mounting base 14, and the power terminal block 15 are fixed by screws 16.

  The lighting device case body 9, the lighting device case cover 13, the mounting base 14, and the power supply terminal block 15 are not limited to the screws 16, and may be fixed by engaging with engaging claws or the like.

  The lighting device 3 includes a first leg portion 17 and a second leg portion 18 that float the lighting device case body 9 when the lighting device 3 is installed.

  In the lighting device 3, the power terminal block 15 is disposed on one end side (first leg portion 17 side) of the rectangular parallelepiped portion 11, and the lamp 2 is connected from the protruding portion 12 side (second leg portion 18 side). The connecting tool 4 is pulled out.

  The connection tool 4 has an electric wire 19 inside, and mechanically connects the lamp 2 and the lighting device 3.

  The circuit board 10 is supplied with commercial power and supplies power to the light source 5 via the electric wire 19.

  Next, the operation of attaching the lighting fixture to the ceiling embedding hole will be described with reference to FIG.

  4A is a cross-sectional view illustrating a process of attaching the lighting fixture to the ceiling material, and FIG. 4B is a cross-sectional view illustrating a state in which the lighting fixture is attached to the ceiling material.

  The ceiling material 20 is provided so as to maintain a predetermined space with the structure 21 on the back side of the ceiling material 20. For example, the ceiling material 20 is suspended from the structure 21 by an anchor (not shown) or the like. Yes.

  The ceiling member 20 is provided with a ceiling embedding hole 22 for attaching the embedded lighting device 1.

  Further, a power line 23 and the like are provided in a space portion between the ceiling material 20 and the structure 21.

  First, the power line 23 is pulled out from the ceiling embedding hole 22 and connected to the power terminal block 15. After connecting the power line 23 to the power terminal block 15, the lighting terminal 3 is obliquely inserted into the ceiling embedding hole 22 from the surface where the power terminal block 15 of the lighting device 3 is attached.

  As the lighting device 3 is inserted into the ceiling embedding hole 22, the angle with respect to the ceiling material 20 gradually becomes shallower and is installed on the back surface 20 b of the ceiling material 20 in a substantially horizontal state. Thereafter, the mounting spring 7 is inserted into the ceiling embedding hole 22, the lamp 2 is pushed up, and the lamp 2 is attached to the ceiling embedding hole 22 so that the light emitting surface of the lamp 2 faces downward.

  The first leg 17 is provided in the vicinity of the distal end with respect to the insertion direction in which the lighting device 3 is inserted, and the second leg 18 is provided in the rear portion with respect to the insertion direction in which the lighting device 3 is inserted. ing.

  Next, the shape (maximum outer shape) of the lighting device 3 will be described from the relationship with the ceiling material 20, the structure 21, and the lighting device 3.

  FIG. 5 is a schematic view when the lighting device is inserted into the ceiling embedding hole, and FIG. 5A is a side sectional view when the lighting device is inserted into the ceiling embedding hole, and FIG. ) Is a top view seen from the back side of the ceiling material when the lighting device is inserted into the ceiling embedding hole.

  First, the length of the rectangular parallelepiped part 11 of the lighting device 3 will be described.

  The length of the ceiling material 20, the ceiling embedding hole 22 and the lighting device 3, the diameter of the ceiling embedding hole 22 is T, the thickness of the ceiling material 20 is Ha, and the surface of the ceiling material 20 (hereinafter referred to as the decorative surface 20a). The distance to the structure 21 is Hd, the height of the lighting device 3 is Ho, and the width of the lighting device 3 is W.

  When the lighting device 3 is inserted into the ceiling embedding hole 22 without rotating and the lighting device 3 is in contact with the structure 21, the angle between the ceiling material 20 and the lighting device 3 is θ, and the ceiling material 20. The point where the decorative surface 20a of the lighting device 3 and the top surface 3a of the lighting device 3 are in contact with the point a, the point where the back surface 20b of the ceiling material 20 and the bottom surface 3b of the lighting device 3 are in contact is point o, and the thickness of the ceiling material 20 from the point o. The point perpendicular to the direction, the point intersecting with the decorative surface 20a of the ceiling member 20 is point b, the perpendicular from the point o in the height direction of the lighting device 3, and the point intersecting the top surface 3a of the lighting device 3 is point c , Side ab is q1, side ao is q2, angle oab is α, and angle cao is β.

  When the top surface 3a and the bottom surface 3b of the lighting device 3 are parallel and the decorative surface 20a and the back surface 20b of the ceiling member 20 are parallel, the angle cab is the same as the angle θ when the lighting device 3 is inserted. θ is θ = α + β.

Next, the angle α and the angle β will be described respectively.
First, when the length q1 of the side ab is obtained, it is expressed as Expression 1.

  Next, since the triangle abo has an angle abo of 90 °, the length of the side bo is Ha. Further, since the side ab is q1 represented by Formula 1, q2 (side ao) and the angle α (angle oab) are represented by Formula 2 and Formula 3, respectively.

  Next, since the angle aco is 90 ° in the triangle aco, the length of the side oc is Ho. Further, since the side ao is q2 represented by Expression 2, the angle β (angle cao) is represented by Expression 4.

  Therefore, the angle θ when the lighting device 3 is slid in the oblique direction with respect to the ceiling member 20 and inserted into the ceiling embedding hole 22 is expressed by Equation 5 from Equation 1 to Equation 4.

  Therefore, when the angle at which the lighting device 3 is inserted into the ceiling embedding hole 22 is the angle θ obtained from the above equation 5, the length of the portion where the lighting device 3 is inserted from the point o that contacts the back surface 20b of the ceiling material 20. The length L1 is the maximum, and the length L1 is expressed as in Equation 6.

  Next, the length L2 of the portion where the lighting device is not inserted from the point o that contacts the back surface 20b of the ceiling material 20 will be described with reference to FIG.

  FIG. 6 is a schematic view when the lighting device is inserted into the ceiling embedding hole, and FIG. 6A is a side sectional view when the lighting device is inserted into the ceiling embedding hole, and FIG. ) Is a top view seen from the back side of the ceiling material when the lighting device is inserted into the ceiling embedding hole.

  The lighting device 3 is inserted into the ceiling embedding hole 22 by sliding the lighting device 3 obliquely with respect to the ceiling material 20, and after the lighting device 3 comes into contact with the structure 21, the lighting device 3 rotates around the point o. To do.

  Accordingly, when the vertex of the rectangular parallelepiped portion 11 contacts (point d) with the back surface 20b (surface facing the decorative surface 20a) side of the ceiling material 20, the length L2 (line segment dc) becomes the maximum, and the length L2 is From the relationship of the triangle odc (angle ocd is 90 °), it is expressed as in Expression 7.

  Therefore, the length L that maximizes the length of the lighting device 3 is obtained by L = L1 + L2, and is stored in the lighting device 3 from the values of the width W of the lighting device 3 and the length L of the lighting device 3. The area of the circuit board 10 is also required.

  Here, although it is the width W of the lighting device 3, since the size of the ceiling embedding hole 22 is determined by the outer peripheral dimension of the lamp 2, the width W of the lighting device 3 is determined by the diameter T of the ceiling embedding hole 22. Is determined. In this embodiment, the diameter of the lamp 2 is 80 mm, the diameter of the ceiling embedding hole 22 is 85 mm, and the width W of the lighting device 3 is limited to less than 85 mm. When these conditions and the thickness Ha of the ceiling member 20 are set to 25 mm and the height Ho of the lighting device 3 is set to 28 mm, the length L of the lighting device 3 and the angle at which the lighting device 3 is inserted at that time θ is obtained from Equations 1 to 7, and these are summarized as shown in Table 1.

  The area shown in Table 1 is derived from the width W of the lighting device 3 and the length L of the lighting device 3, and the thickness of the material constituting the lighting device case main body 9 and the lighting device case cover 13, the lighting Since it is necessary to consider the space between the case inner wall of the lighting device 3 and the circuit board 10 when the circuit board 10 is mounted in the apparatus 3, the actual board area is smaller than the area shown in Table 1.

  On the other hand, the circuit board 10 accommodated in the lighting device 3 is desired to have the volume (area) in the case of the lighting device 3 as close as possible to the maximum so that many electronic components can be mounted. By increasing the volume in the case of the lighting device 3, the heat generating electronic components can be arranged apart from each other.

  Therefore, it is desirable to set the width W of the lighting device 3 between 60.0 mm and 75.0 mm where the volume (area) in the case can be increased, and in particular, it may be set to 65.0 mm.

  In addition, since the angle θ and the lengths L1 and L2 obtained by the equations 5 to 7 are the maximum values, the values may be smaller than the values obtained by the equations 5 to 7 as long as the values are larger than 0. .

  Next, the protrusion 12 of the lighting device 3 will be described with reference to FIG.

  FIG. 7 is a schematic diagram of the lighting device, FIG. 7A is a side view of the lighting device, and FIG. 7B is a top view of the lighting device viewed from the top side.

  When the lighting device 3 is inserted into the ceiling embedding hole 22, the end of the lighting device 3 is located at the ceiling embedding hole 22 so as to rotate about the portion (point o) that contacts the hole angle in the insertion direction. It is attached to the back side of the ceiling material 20 while contacting the inner wall. Note that when the lighting device 3 is rotated and inserted into the ceiling embedding hole 22, a slight deviation occurs at the point o which is the axis, but it can be ignored.

  At this time, there is a margin for extending the lighting device 3 on the rear side with respect to the insertion direction, and attention was paid to this point.

  The upper corner of the rectangular parallelepiped portion 11 of the lighting device 3 (the most protruding tip is referred to as a point e) draws a curve R in the shape of a buried hole so as to contact the back surface 20b of the ceiling member 20.

  Moreover, it spreads while drawing the curved surface U so that it may go to the lower part direction of the lighting device 3 so that the lighting device 3 may rotate around the point of contact o, and the lower surface end of the lighting device 3 (the most protruding tip) The curve S is drawn in the shape of the ceiling embedding hole 22 so that the portion is referred to as a point f) abuts against the back surface 20b of the ceiling material 20.

  The curves R and S are arcs (subordinate arcs) centered on the point P, and the curved surface U is an arc (subordinate arc) centered on the point o.

  As described above, when the lighting device 3 is formed of a molded product such as a resin, the curved portions R and S are drawn in accordance with the shape of the ceiling embedding hole 22 at one end portion of the projecting portion 12 and the curved surface U is rotated in the rotation direction. It is most desirable to form

  However, when the lighting device case cover 13 or the like is processed using a plate material or the like, it is technically difficult and costly to draw the curves R and S and process the curved surface U.

  Therefore, the shape of the protrusion 12 of the lighting device 3 formed by a polyhedron advantageous in terms of cost will be described with reference to FIG.

  FIG. 8 is a schematic diagram of the lighting device, FIG. 8A is a side view of the lighting device, and FIG. 8B is a top view of the lighting device as seen from the top side.

  First, the inclined side surface 25 with respect to the width direction of the lighting device 3 will be described.

  The line eg is extended from the front end portion (point e) extended from the center in the width direction of the lighting device 3 and from the top surface 3 a so as to be parallel to the width direction of the lighting device 3. Furthermore, the point which connects line segment eg and the edge part (point g) which extended the bottom face 3b of the lighting device 3 and the corner | angular part (point d) of the rectangular parallelepiped part 11 of the lighting device 3 are connected (line segment dg). The angle σ of the line segment dg with respect to the width direction of the lighting device 3 at this time is obtained.

  First, the length L3 of the perpendicular line from the point P, which is the length of the protruding portion, to the line segment dd is expressed by Equation 8.

  Next, when the center of the curve R (arc) shown in FIG. 8B is the center point P, the radius L4 of the curve R is expressed by Equation 9.

  Next, assuming that the center of the curve S (arc) shown in FIG. 8B is the center point P and the diameter when the curved surface S is drawn to draw a circle is T, the length W2 from the point e to the point g2 Is shown in Equation 10.

  Further, the length W3 of the horizontal component with respect to the width direction of the lighting device 3 from the point d to the point d is expressed by Equation 11.

  Therefore, the angle σ of the line segment dg with respect to the width direction of the lighting device 3 is expressed by Expression 12.

  When the inclined side surface 25 of the protruding portion 12 is formed by bending the line segment dg and the line segment eg (line segment gg) thus obtained, the width W2 of the protruding portion 12 of the lighting device 3 and the angle σ of the inclined side surface 25. Is summarized in Table 2. The width W2 of the protrusion 12 of the lighting device 3 indicates the length of the line segment eg from the center of the lighting device 3 to the point g (half the length of the line segment gg).

  Moreover, workability | operativity when inserting the lighting device 3 in the ceiling embedding hole 22 is inferior compared with the lighting device 3 provided with the protrusion part 12 of this Embodiment, and the lighting device 3 which is not provided with the protrusion part 12. There is no.

  Note that the angle σ obtained by the equation 12 is a maximum value, and may be a value smaller than the value obtained by the equation 12 as long as the value is larger than 0.

  As described above, the shape of the inclined side surface 25 of the protruding portion 12 of the lighting device 3 has been described.

  Next, the inclined top surface 24 with respect to the height direction of the lighting device 3 will be described.

  9 is a schematic diagram of the lighting device, FIG. 9A is a side view of the lighting device, and FIG. 9B is a top view of the lighting device as seen from the top surface side. (C) is an A direction arrow view when the edge part of a lighting device is seen from the A direction of FIG.9 (b).

  The end portion of the lighting device 3 forms a side end face 26 so as to rise in the vertical direction from the line segment gg, and has an elliptical shape with the line segment gg as an axis (from one point g to the other point g via the point e. It is a semi-elliptical shape depicting a substantially elliptical locus).

  When the angle σx forming the inclined side surface 25 of the protrusion 12 is smaller than σ obtained by Equation 12, the inclined side surface 25 bent to the angle σx and the elliptical intersection (point ex) are from the lighting device. The height Hx is increased. Further, the inclined top surface 24 is inclined to this point ex.

  Note that the length L5 in the horizontal direction from the point d to the point e, which is the length of the protruding portion 12, is expressed by Equation 13.

  Next, when the angle of the inclined side surface 25 is σx, the length W2x from the point e to the point gx and the length W3x from the point gx to the side surface of the lighting device 3 are expressed by Equations 14 and 15, respectively. Shown in

  Furthermore, when the inclined side surface 25 is set to the angle σx, the shape of the end surface of point gx−point gx (the shape viewed from the direction of arrow A) draws an elliptical locus, and therefore is expressed as in Expression 16.

  Therefore, when the inclined side surface 25 is at an angle σx, the height (length from the point ex to the point gx) Hx of the side end surface 26 is as shown in Expression 17.

  Next, when the inclined top surface 24 is inclined to connect the point d and the point Hx, the angle γx is as shown in Expression 18.

  Therefore, when the angles σx, γx, the lengths W2x, W3x, L5, and the height Hx are summarized from the above equations 13 to 18, Table 3 is obtained. The width W of the lighting device 3 is 65 mm which maximizes the area of the circuit board 10 calculated in Table 1, and the other conditions are that the diameter T of the ceiling embedding hole 22 is 85 mm as in Table 1. The height Ho of 3 was 28 mm. Moreover, the area of the bottom face of the protrusion part 12 of the lighting device 10 calculated by the same method as the rectangular parallelepiped part 11 shown in Table 1 is also shown.

  Here, since σ obtained by Expression 12 is an angle when connecting the point g and the point d on the curve S, the angle σ is the maximum. Therefore, the range of σx is smaller than this σ and is an angle until the length W2x becomes zero.

  Here, the circuit board 10 has a thickness of 2 mm, and the height of the electronic component (for example, a connection terminal or an integrated circuit which is an electronic component having a low height) is about 10 mm. Further, the distance between the circuit pattern surface of the circuit board 10 and the inner wall of the case (distance for obtaining an electrical insulation distance) is required to be about 5 mm. Thus, the internal shape of the lighting device 3 is determined in consideration of these, and the minimum height of the protrusion 12 is also determined. Accordingly, the minimum height Hx of the lighting device 3 is preferably about 18 mm. At this time, according to Table 3, γx is 63 °.

  In the conditions of Table 3, the length L5 of the protruding portion is 18.3 mm. However, when the experiment on the workability of inserting the lighting device 3 into the ceiling embedded hole 22 is repeated, the angle σx shown in Table 3 is 45. ° When the minimum height Hx of the end portion of the lighting device 3 is set to 18.7 mm, and further 9.5 mm shorter than the value of the length L5 of the protruding portion 12 shown in Table 3, workability is improved. It has been found that the area of the circuit board 10 can be increased while improving the best. At this time, the angle γx calculated from Expression 18 is approximately 45 °.

  Therefore, the lighting device 3 is inserted into the ceiling embedding hole 22 because the lighting device 3 can be made smaller in width than the ceiling embedding hole 22 by reducing the outer shape of the lighting device 3 with respect to the maximum outer shape determined by the above formulas 1 to 18. It becomes easy to do, and it can be set as the shape which the external shape of the lighting device 3 is easy to process.

  Moreover, although the 1st leg part 17 and the 2nd leg part 18 are shown in the lighting device 3 shown in FIGS. 1-4, in FIG. The first leg portion 17 and the second leg portion 18 are not shown. Next, the first leg portion 17 and the second leg portion 18 will be described.

  The first leg 17 has the lighting device 3 inserted into the ceiling embedding hole 22 so that the lighting device 3 is in contact with the structure 21, and the back surface 20 b side of the ceiling material 20 is placed at a point o on the bottom surface 3 b of the lighting device 3. Until contact is made, the tilt of the lighting device 3 can be changed without affecting workability.

  Further, when the lighting device 3 is in contact with the structure 21 and the back surface 20b of the ceiling material 20 is in contact with the point o where the bottom surface 3b of the lighting device 3 is in contact, the angle between the lighting device 3 and the ceiling material 20 is limited to θ. Thereafter, the lighting device 3 is rotated with the point o as a base point. When the lighting device 3 is rotated, the second leg portion 18 gradually moves to the position on the back surface 20b side of the ceiling material 20, and the second leg portion 18 comes to the back surface 20b side of the ceiling material 20. Next, the lighting device 3 is slid in a direction parallel to the ceiling material 20, and the lighting device 3 is arranged on the back surface 20 b side of the ceiling material 20. At this time, the first leg portion 17 and the second leg portion 18 are in contact with the back surface 20 b of the ceiling material 20.

  Therefore, the second leg 18 does not affect workability until the lighting device 3 is inserted into the ceiling embedding hole 22 and installed on the back of the ceiling.

  As described above, even if the first leg 17 is provided near the distal end in the insertion direction in which the lighting device 3 is inserted and the second leg 18 is provided behind the point o, the portion where the height of the lighting device is low. Since the lighting device 3 is inserted into the ceiling embedding hole 22 by turning to the point o, the space between the ceiling material 3 and the structure 21 is formed by the first leg portion 17 and the second leg portion 18. Does not affect the distance.

  In addition, since the first leg 17 and the second leg 18 can float the bottom surface 3b of the lighting device 3, an air layer is formed between the bottom surface 3b of the lighting device 3 and the back surface 20b of the ceiling member 20. Can be given.

  That is, the heat generated by the operation of the circuit board 10 can be prevented from being transmitted to the ceiling member 20, and the heat dissipation of the circuit board 10 can be improved.

  In the present embodiment, the case where the first leg portion 17 and the second leg portion 18 are provided has been described. However, for example, the circuit board 10 generates less heat, and the bottom surface 3b of the lighting device 3 is used as the back surface of the ceiling material 20. When it may contact with 20b, when installing in the ceiling material 20 which has heat dissipation, etc., it is not necessary to provide the 1st leg part 17 and the 2nd leg part 18. FIG.

  At this time, since the bottom surface 3b of the lighting device 3 is in surface contact with the back surface 20b of the ceiling member 20, the lighting device 3 can be installed in a more stable state.

  In the present embodiment, the case where the lighting device 3 comes into contact with the structure 21 behind the ceiling when the lighting device 3 is inserted into the ceiling embedding hole 22 has been described. However, the lighting device 3 has a short length. It may be.

  In this case, when the length of the lighting device 3 is L6, the minimum angle η when the lighting device 3 is inserted is as follows.

  Therefore, since the minimum angle when the lighting device 3 is inserted changes (in this case, the angle η is smaller than the angle θ), the shape (maximum outline) of the protrusion 12 can be changed.

  Thus, in the present embodiment, the maximum outline shape of the lighting device 3 (the width W, the length L, the angle γ of the inclined top surface, and the angle σ of the inclined side surface) of the lighting device 3 has been described. It is obvious that the width, length, angle of the inclined portion, etc. of the lighting device 3 may be reduced within the range.

  Further, since the power supply terminal block 15 is provided near the tip in the insertion direction in which the lighting device 3 is inserted into the ceiling embedding hole 22, when the lighting device 3 is inserted into the ceiling embedding hole 22, The power supply line 23 is not sandwiched between the side surfaces of the device 3 and the width of the lighting device 3 can be increased.

FIG. 3 is a perspective view showing the lighting apparatus in the first embodiment. 3 is an exploded perspective view showing the lighting apparatus in Embodiment 1. FIG. It is a figure which shows the side view of the lighting device in Embodiment 1. FIG. FIG. 6 is a diagram illustrating an attachment operation of the lighting fixture in the first embodiment. 2 is a schematic diagram of a lighting device in Embodiment 1. FIG. 2 is a schematic diagram of a lighting device in Embodiment 1. FIG. 2 is a schematic diagram of a lighting device in Embodiment 1. FIG. 2 is a schematic diagram of a lighting device in Embodiment 1. FIG. 2 is a schematic diagram of a lighting device in Embodiment 1. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Lighting fixture, 2 lamp, 3 lighting device, 3a makeup | decoration surface, 3b back surface, 4 connection tool, 5 light source, 6 lamp main body, 7 mounting spring, 8 radiation fin, 9 lighting device case main body, 10 circuit board, 11 rectangular parallelepiped part , 12 Projection, 13 Lighting device case cover, 14 Mounting base, 15 Power terminal block, 16 Screw, 17 First leg, 18 Second leg, 19 Electric wire, 20 Ceiling material, 20a Top surface, 20b Bottom , 21 Structure, 22 Ceiling embedded hole, 23 Power line, 24 Inclined top surface, 25 Inclined side surface, 26 Side end surface.

Claims (7)

In a lighting device incorporating a circuit board for lighting a light source,
The lighting device is
A rectangular parallelepiped portion having a substantially rectangular bottom surface;
A protruding portion that extends from the rectangular parallelepiped portion and protrudes from an inclined top surface that inclines toward the bottom surface from the top surface of the rectangular parallelepiped portion, an inclined side surface that narrows in the central direction as it protrudes from the side surface of the rectangular parallelepiped portion, and
A lighting device comprising: When the ceiling embedding hole diameter is T, the lighting device height Ho, and the lighting device width W, the inclined side surface has an angle with respect to the width direction of the lighting device larger than 0 ° and The lighting device according to claim 1, wherein the lighting device is formed at an angle σ or less.

When the ceiling embedding hole diameter is T, the lighting device height Ho, and the lighting device width W, the angle of the inclined top surface with respect to the height direction of the rectangular parallelepiped is larger than 0 °, and The lighting device according to claim 2, wherein the lighting device is formed with an angle γx or less.

  The lighting device according to any one of claims 1 to 3, further comprising a first leg portion and a second leg portion near the bottom surface and both ends in the longitudinal direction.   The lighting device according to any one of claims 1 to 4, wherein a power supply terminal block is disposed in the vicinity of the tip in the insertion direction to be inserted into the ceiling embedding hole.   The lighting device according to claim 5, wherein the power terminal block is disposed on a surface of the rectangular parallelepiped portion facing the protruding portion. The lighting device according to any one of claims 1 to 6,
A lamp unit having a light source to which power is supplied from the lighting device;
A connector for connecting the lighting device and the lamp unit;
An embedded lighting apparatus comprising:

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