JPH1040734A - Lamp body mounting base and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability of a lamp body mounting base. SOLUTION: A frame portion 22 to be embedded in a mounting face is provided with an engagement portion 23 to be engaged with a mounting face, and a feed screw 37 is operably provided from a mounting face side. An engagement portion 39 is movably provided vertically by the feed screw 37. When the engagement portion 39 is moved upwardly, the engagement portion 39 is saved against elasticity at a non-engagement position against the mounting face, and embedding of the frame portion 22 into the mounting face is permitted. When the engagement portion 39 is moved downwardly, the engagement portion 39 is exploded by means of elasticity at the engagement enable position against the mounting face, and the mounting face can be pinched into cooperation with the engagement portion 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture mounting base and a lighting fixture in which workability is considered.

[0002]

2. Description of the Related Art Conventionally, when a general downlight is installed on a ceiling plate, a frame portion of the downlight is inserted into an embedding hole formed in the ceiling plate, and the inside of the frame portion (a lamp or a reflector is mounted). Insert the hands into the inner space), pull out the locking metal fittings located on the side of the frame, and pull it down.
The frame portion is installed on the ceiling plate by sandwiching the ceiling plate between a flange portion of the frame portion that engages with the surface of the ceiling plate and a latch fitting that engages with the back surface of the ceiling plate.

[0003] However, such a structure has a problem that it is difficult to operate the locking fitting by inserting a hand into the inside of the frame portion.

Further, as described in, for example, US Pat. No. 5,331,531, a feed screw is rotatably provided on a side surface of a frame along a vertical direction, and a nut is screwed onto the feed screw. There is a structure in which a locking metal that can advance and retreat is laterally provided on the side of the frame portion. When the nut is moved to the uppermost end by the turning operation of the feed screw, the locking fitting is allowed to be turned down inward of the frame portion so as not to engage with the ceiling plate, and the nut is moved to the lower end. When it moves to the side, it is forcibly rotated to the side of the frame portion and protrudes, so that it can be engaged with the back surface of the ceiling plate.

When the frame is embedded in the ceiling plate, the frame is embedded in the ceiling plate in a state where the locking metal is tilted inward of the frame, and the end of the feed screw facing the lower surface of the frame is inserted. By rotating the feed screw and moving the nut to the lower end side, the locking metal is forcibly protruded to the side of the frame portion and engaged with the back surface of the ceiling plate. Thereby, the locking fitting can be operated without inserting the hand inside the frame portion.

[0006]

However, in the structure described in U.S. Pat. No. 5,331,531, in a state where the nut is moved to the uppermost end, the inside of the frame portion is so fixed that the locking metal does not engage with the ceiling plate. It is possible to turn it down and turn it down, and conversely, it is also possible to turn it out of the frame and project it out of the frame. There is a problem that there is a problem in the construction such that the protruding locking metal fittings are caught on the ceiling plate so that the embedding work cannot be performed.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to provide a lighting fixture mounting base and a lighting fixture which can improve workability.

[0008]

According to a first aspect of the present invention, there is provided a lamp body mounting base, comprising: a frame portion embedded in a mounting surface; an engaging portion provided in the frame portion and engaged with the mounting surface; A feed screw disposed on the frame portion so as to be operable from the mounting surface side, and movably provided by operation of the feed screw, and retreating to a non-engagement position with respect to the mounting surface by movement to a predetermined position against elasticity; And at the same time, by being moved to a position deviated from a predetermined position, it is elastically deployed to an engageable position with respect to the mounting surface,
And a locking portion which cooperates with the engaging portion so as to be able to clamp the mounting surface. When the locking portion is moved to a predetermined position, the locking portion retreats to a non-engagement position with respect to the mounting surface against the elasticity, so that the locking portion hinders embedding of the frame portion into the mounting surface. No. Moreover, when the locking portion is moved to a position deviated from a predetermined position after the frame portion is embedded, the locking portion is elastically deployed to a position where it can be engaged with the mounting surface. The surface can be pinched.

According to a second aspect of the present invention, there is provided the lamp body mounting base according to the first aspect, wherein the locking portion is provided so as to be movable along an embedding direction of the frame portion and the embedding direction. Is provided at a predetermined position, and is provided with a retracting means which is disposed at the predetermined position, engages with the locking portion, and retracts the locking portion. Each operation of retracting the locking portion, projecting the locking portion, and holding the mounting surface by the locking portion is performed.

According to a third aspect of the present invention, there is provided a lamp body mounting base according to the first or second aspect, wherein the locking portion comprises:
When the frame portion is embedded in the mounting surface, the frame is retracted against the elasticity by the contact with the mounting surface against the non-engagement position, and is deployed by the elasticity to the engageable position by releasing the contact with the mounting surface. Things. And when embedding the frame on the mounting surface,
Even if the locking portion protrudes to the side of the frame portion, the locking portion abuts on the mounting surface, so that the locking portion can be embedded in the non-engagement position while retracting against the elasticity. Furthermore, when the locking portion that has passed through the mounting surface is detached from the mounting surface, the locking portion is elastically deployed to the engageable position, so that the frame portion is temporarily fixed to the mounting surface.

According to a fourth aspect of the present invention, in the lamp body mounting base according to any one of the first to third aspects, the locking portion is provided so as to be movable along a direction in which the frame portion is embedded. The other end is rotatable to a non-engagement position and an engageable position with one end in the embedding direction as a fulcrum. And when embedding the frame on the mounting surface,
Even if the locking portion protrudes to the side of the frame portion, the locking portion abuts on the mounting surface, so that the locking portion can be embedded in the non-engagement position while retracting against the elasticity. Furthermore, when the locking portion that has passed through the mounting surface is detached from the mounting surface, the locking portion is elastically deployed to the engageable position, so that the frame portion is temporarily fixed to the mounting surface. Moreover, the locking portion is movable along the embedding direction of the frame portion, and the other end is rotated to the non-engagement position and the engageable position with one end in the embedding direction as a fulcrum. The retracting of the locking portion to the non-engaging position is facilitated.

According to a fifth aspect of the present invention, there is provided the lamp mounting base according to any one of the first to fourth aspects, further comprising an urging means for urging the locking portion. Elasticity is given to the part.

According to a sixth aspect of the present invention, there is provided a lighting apparatus comprising the lamp body mounting base according to any one of the first to fifth aspects and a lamp body detachably mounted on the lamp body mounting base. Workability is improved.

According to a seventh aspect of the present invention, there is provided a lighting device, wherein a frame portion embedded in the mounting surface, an engaging portion provided on the frame portion and engaged with the mounting surface, and the frame portion is operated from the mounting surface side. A feed screw disposed so as to be movable, and provided so as to be movable by operation of the feed screw, and retreats to a non-engagement position with respect to the mounting surface by movement to a predetermined position against elasticity, and comes off from the predetermined position. A locking portion that is elastically deployed to a position where it can be engaged with the mounting surface by the movement to the inclined position, and that allows the mounting surface to be clamped in cooperation with the engaging portion; and a reflection supported by the frame portion. And a lamp socket disposed in a predetermined positional relationship with respect to the reflector. When the locking portion is moved to a predetermined position, the locking portion retreats to a non-engagement position with respect to the mounting surface against the elasticity, so that the locking portion hinders embedding of the frame portion into the mounting surface. No. Moreover, when the locking portion is moved to a position deviated from a predetermined position after the frame portion is embedded, the locking portion is elastically deployed to a position where it can be engaged with the mounting surface. The surface can be pinched.

According to an eighth aspect of the present invention, in the lighting apparatus according to the seventh aspect, the locking portion is provided so as to be movable along the embedding direction of the frame portion, and the end portion in the embedding direction is provided. A retracting means disposed at the predetermined position and arranged at the predetermined position to engage with the locking portion and retreat the locking portion, wherein the locking portion moves with the movement of the locking portion. , The protrusion of the locking portion, and the holding of the mounting surface by the locking portion.

According to a ninth aspect of the present invention, in the lighting apparatus according to the seventh or eighth aspect, when the frame is embedded in the mounting surface, the locking portion is brought into a non-engagement position by contact with the mounting surface. The elastic member is retracted against the elastic force, and is deployed elastically to an engageable position by releasing the contact with the mounting surface. When the frame portion is embedded in the mounting surface, even if the locking portion protrudes to the side of the frame portion, the locking portion comes into contact with the mounting surface, so that the locking portion elastically moves to the non-engaging position. It can be embedded while evacuating. Furthermore, when the locking portion that has passed through the mounting surface is detached from the mounting surface, the locking portion is elastically deployed to the engageable position, so that the frame portion is temporarily fixed to the mounting surface.

According to a tenth aspect of the present invention, in the lighting fixture of the seventh aspect, the locking portion is provided so as to be movable along a direction in which the frame portion is embedded.
The other end is rotatable to a non-engagement position and an engageable position with one end in the embedding direction as a fulcrum. When the frame portion is embedded in the mounting surface, even if the locking portion protrudes to the side of the frame portion, the locking portion comes into contact with the mounting surface, so that the locking portion elastically moves to the non-engaging position. It can be embedded while evacuating. Furthermore, when the locking portion that has passed through the mounting surface is detached from the mounting surface, the locking portion is elastically deployed to the engageable position, so that the frame portion is temporarily fixed to the mounting surface. Moreover, the locking portion is movable along the embedding direction of the frame portion, and the other end is rotated to the non-engagement position and the engageable position with one end in the embedding direction as a fulcrum. The retracting of the locking portion to the non-engaging position is facilitated.

According to an eleventh aspect of the present invention, there is provided the lighting fixture according to any one of the seventh to tenth aspects, further comprising an urging means for urging the locking part. Granted.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 9 show the structure of a downlight as a first embodiment. 8 shows a side view of the downlight construction state, FIG. 9 shows a side view corresponding to FIG. 8 in which the base shown in FIG. 8 is sectioned, and in these figures, 1 designates a mounting surface for mounting the downlight. The ceiling board 1 has a circular embedding hole 2 for embedding and installing a downlight. Into the embedding hole 2, a power supply line (not shown) wired in the ceiling space above the ceiling plate 1 and a feed wiring (not shown) for supplying power to a separately installed lighting fixture or the like are drawn.

The downlight is composed of a lamp body mounting base 11 and a lamp body 12. The lamp body mounting base 11 is embedded and installed in the embedding hole 2 of the ceiling plate 1. The body 12 is detachably mounted.

FIG. 1 is an exploded perspective view of the downlight lamp body mounting base 11 and the lamp body 12, FIG. 2 is a perspective view of the lamp body mounting base 11 in an exploded state, and FIG. base
11 shows a bottom view. The lamp body mounting base 11 has a base body 21 made of synthetic resin having insulating properties. The base body 21 has a frame 22 inserted and embedded in the embedding hole 2.
An annular flange portion 23 is formed as an engaging portion that protrudes from the lower edge of the frame portion 22 in the outer radial direction and engages with the surface (lower surface) of the ceiling plate 1.

A cylindrical portion 24 is formed on the lower side of the frame portion 22, a pair of rising portions 25 is formed to rise from a symmetric position of the cylindrical portion 24, and a pedestal portion 26 is formed between upper ends of the both rising portions 25. An open portion 27 is formed between the cylindrical portion 24, the rising portion 25, and the gantry portion 26. Inside the frame part 22, a lamp body insertion part 28 into which the lamp body 12 is inserted is formed to open downward.

A concave portion 29 is formed on the outer surface of each rising portion 25, and a mounting opening 30 is formed inside the concave portion 29. A notch 31 is formed at the upper center of the mounting opening 30. A groove 32 is formed in the lower center of the mounting opening 30. A concave step portion 33 is formed at the upper right of the concave portion 29, and a mounting hole 34 is formed in the step portion 33.

A locking unit 35 is attached to each rising portion 25. The locking unit 35 includes a support plate 36,
It is composed of a feed screw 37, a moving body 38, a locking body 39 as a locking portion, and a spring 40 as a biasing means.

The support plate 36 is formed to have a size to be fitted into the concave portion 29, and has a lower portion formed with a hooking piece 41 to be engaged with the groove 32, and a right upper side formed with an inner surface ( Base body 21 side)
A mounting piece 42 is formed which is bent to engage with the step 33,
The attachment piece 42 has an insertion hole 43 formed therein. An opening 44 is formed in the center of the support plate 36, and the support pieces 45 are formed by bending the upper and lower edges of the opening 44 toward the inner surface side, and a support hole 46 is formed in each of the support pieces 45. Have been. On both sides of the support piece 45 at the upper edge of the opening 44, a pair of guide pieces 47 are formed that project outward and are bent downward as retraction means. Although described in detail later, the upper end (the end in the embedding direction) of the support plate 36 where the guide piece 47 is provided retracts the locking body 39 to the non-engagement position with respect to the ceiling plate 1. It is configured as a predetermined position.

The upper and lower ends of the feed screw 37 are rotatably engaged with the support holes 46 of the upper and lower support pieces 45 of the support plate 36, and a C ring 48 which is engaged with the upper end of the feed screw 37. Has been prevented by. At the lower end of the feed screw 37, an engaging portion 49 is formed for engaging a tool such as a screwdriver to rotate.

A screw hole 50 is formed at the center of the moving body 38 to be screwed with the feed screw 37, and a slide groove 51 slidably engaged with both side edges of the opening 44 of the support plate 36 is formed on both side edges. Is formed. A pair of engaging holes are provided near the outer edge of the moving body 38.
52 are formed, a pair of through holes 53 are formed on both sides of the screw hole 50, and a pair of hook pieces 54 are formed upright on the inner edge. The moving body 38 is moved in the vertical direction (embedding direction) by the rotation of the feed screw 37.

The locking body 39 has a locking plate portion 55 and side plate portions 56 formed by bending both sides of the locking plate portion 55 to the inner surface side, and is inserted through the opening portion 44 of the support plate 36. It is formed in a width that allows it. Each engaging hole 52 of the moving body 38 is provided at the upper end of the locking plate 55.
A pair of substantially L-shaped engaging pieces 57 which are inserted from below into and are engaged with are formed.
Is pivotable between a non-engagement position that is substantially parallel to the support plate 36 side and an engageable position that projects obliquely laterally. A stopper 58 is provided laterally from the upper end of each side plate 56.
The stopper 58 abuts against the inner surface side of the support plate 36 when the locking body 39 swings toward the engageable position, so that the locking body 39 Swing is regulated.

The spring 40 is formed by molding a spring wire into a substantially U-shape. Both ends of the spring 40 are inserted from below the through holes 53 of the moving body 38 and are hooked on the hook pieces 54. The intermediate portion is in contact with the inner surface side of the locking body 39 to urge the locking body 39 toward the engageable position.

Then, the locking body 39 and the spring 40 are incorporated in the moving body 38, and the feed screw 37 is screwed together.
39 is passed through the opening 44 from the inner surface side of the support plate 36, the slide groove 51 of the moving body 38 is engaged with the support plate 36, and the upper and lower ends of the feed screw 37 are inserted into the support piece 45 of the support plate 36. The engaging unit 35 is assembled by engaging and stopping with the C-ring 48. The assembled lock unit 35 is
The hooking piece 41 of the base 36 is engaged with the groove 32 of the base body 21, the support plate 36 is fitted into the recess 29, and the mounting piece 42 is
And the mounting screw 59 is screwed into the mounting hole 34 of the step portion 33 through the insertion hole 43 of the mounting piece portion 42, so that the base body 21 is
It is fixed to the rising part 25 of the.

Further, a guide hole 61 which opens vertically in the center is formed in the base 26 of the base body 21.
An annular portion 62 is formed around the guide hole 61, and a terminal block 63 is integrally formed on one end side of the annular portion 62. A cover 64 is formed on the upper surfaces of the annular portion 62 and the terminal block 63.
Is detachably attached.

The annular portion 62 has a bottom portion 65, an inner peripheral portion 66 and an outer peripheral portion 67 raised from the inner and outer peripheral edges of the bottom portion 65, and these form a terminal housing groove 68 which opens upward. ing. In this terminal storage groove 68, a boss 70 having a mounting hole 69 on the opposite side to the terminal stand 63 is erected, and a plurality of terminal holding pieces 71 are erected on both sides intersecting both end directions of the gantry part 26. I have.

The terminal block 63 has a pair of concave terminal housing portions 72 formed in parallel with each other.
Are formed at the lower ends of the electric wire insertion holes 73 communicating with the outer ends of the electric wires. A mounting hole 74 is formed on the annular portion 62 side of each set of terminal storage portions 72, and a mounting hole 75 is formed between both sets of terminal storage portions 72.

The bottom surface 65 of the annular portion 62 has symmetrically formed engaging holes 77 at symmetrical positions in a direction intersecting both ends of the gantry portion 26. The engagement hole 77 is formed with a groove portion 78 formed toward the outer peripheral side of the bottom portion 65 and an end portion in a counterclockwise direction when viewed from the bottom direction of the groove portion 78 (in a state shown in FIG. 4). An insertion hole 79 is formed in the groove hole 78 and the insertion hole 79.
Are formed in a substantially L-shape.

The terminal housing groove 68 of the annular portion 62 is provided with a pair of terminal members 80 at symmetrical positions in a direction intersecting with both ends of the gantry portion 26.
Is arranged. Each of the terminal bodies 80 has a conductive plate 81 inserted and held between the inner peripheral portion 66 and the terminal holding piece 71, and a hook type power supply terminal 82 is spot-welded to an outer surface of an intermediate portion of the conductive plate 81. The terminal plate 83 is attached to the end of the conductive plate 81 facing the terminal block 63 by spot welding.

Each hook-type power supply terminal 82 is disposed concentrically about the guide hole 61 on the inner peripheral edge of the groove 78, and is provided at one end facing the insertion hole 79. Is formed with a locking projection 84 protruding upward, and at the other end, an engagement recess 85 having a chevron shape.
Are formed.

Each of the terminal plates 83 is disposed on the terminal storage section 72 of each set of the terminal block 63, and has an insertion hole 86 corresponding to the position of the mounting hole 74 of the terminal block 63. A window hole 87 is formed on the distal end side. Terminal storage section 72 of terminal block 63
, A lock terminal 88 combined with the terminal plate 83 is provided.

After the lock terminals 88 are inserted into the respective terminal storage portions 72 of the terminal block 63, the conductive plate 81 and the hook-type power supply terminals 82 of the respective terminal bodies 80 are inserted into the terminal storage grooves 68 of the annular portion 62. At the same time, the terminal plate 83 of each terminal body 80 is aligned on the terminal block 63, and the mounting screws 89 are screwed into the mounting holes 74 of the terminal block 63 through the insertion holes 86 of the terminal plate 83, so that each terminal body 80 is mounted on the base. Attached to part 26.

The cover 64 has an annular cover portion 90 covering the upper surface of the annular portion 62 and a terminal block cover portion 91 covering the upper surface of the terminal block 63.
Mounting holes 92 and 93 are formed corresponding to the positions of the mounting holes 75 of the 63, and the mounting screws 94 are inserted through the mounting holes 69 and 75 through the mounting holes 92 and 93.
The cover 64 is attached to the gantry 26 by screwing the cover 64.

In the terminal block cover 91, the upper side of each wire insertion hole 73 is formed on the lower surface on the distal end side, and a window hole 95 is formed in the center. A release button 96 is provided inside the window hole 95,
The release button 96 is formed with a pushing portion 97 that can be inserted into the window hole 87 of the terminal plate 83 and engage with each lock terminal 88.

Then, by inserting the ends of a pair of core wires, not shown, of the power supply wire and the feed wire (not shown) into the wire insertion holes 73 of the terminal block 63, the core wires are connected to the terminal plate 83 and the locking terminal.
It is press-fitted between it and 88, and it is stopped and locked in the state of electrical connection.

FIG. 3 is a perspective view of the disassembled state of the lamp body 12, FIG. 5 is a plan view of the lamp body 12, FIG. 6 is a sectional view taken along the line AA of FIG. 5, and FIG. FIG. 7 is a sectional view corresponding to FIG. 6 rotated to a position.

The lamp body 12 includes a lamp body 101 as a lamp body.
The lamp body 101 includes a reflector 102 and a flange body 103 attached to a lower portion of the reflector 102, and an irradiation opening 104 is formed on the lower surface.

The reflector 102 is made of a synthetic resin having an insulating property and is formed in a conical shape with its lower end expanding, and a plurality of mounting pieces 106 having an insertion hole 105 protruding from the lower end outer surface. The flange body 103 is made of, for example, synthetic resin or metal, and is formed in an annular shape corresponding to the shape of the lower end of the reflector 102, and has a plurality of bosses 10 having mounting holes 107 on its outer surface.
8 is formed. Then, attach the mounting screw 109 to the reflector 10
The mounting hole 10 on the flange body 103 side through the insertion hole 105 on the side 2
7 and the reflector 102 and the flange 103
Are linked.

A socket mounting recess is provided on the side surface of the reflector 102.
The socket mounting recess 110 has an opening 111 formed therein. At the lower part on both sides of the socket mounting recess 110, mounting bases 112 are formed.
In FIG. 2, a bearing groove portion 113 that opens upward is formed oppositely, and a mounting hole 114 is formed on the upper surface of each mounting base portion 112.

A lamp socket 115 is mounted in the socket mounting recess 110 of the reflector 102. The lamp socket 115 includes a socket holder 116, a socket 117, a pair of socket terminals 118 a and 118 b, and a socket cover 119.

The socket holder 116 is made of insulating synthetic resin and has a support plate 120. The lower ends of both sides of the support plate 120 are rotatably engaged with the bearing grooves 113 of the reflector 102. A shaft portion 121 is formed to protrude. A socket tube portion 122 is formed on the outer surface of the support plate portion 120 so as to protrude therefrom, and the inside of the socket tube portion 122 is formed to be open in the axial direction. On the upper surface of the socket tube part 122, a terminal holding part is provided on the support plate part 120 side.
The terminal holding portion 12
From 3 to the outer end of the socket tubular portion 122, a terminal engaging portion 124 which is gently curved and continuous is formed so as to protrude. The terminal holding portion 123 is formed with a pair of terminal engaging grooves 125 for engaging the pair of socket terminals 118a and 118b.
A communication portion 126 communicating with the inside of the socket tube portion 122 is formed corresponding to the position of the one terminal engagement groove 125.
A mounting hole 127 is formed in the lower part of the outer end of the socket tube part 122.

The receiver 117 is connectable to a lamp 129 having a base 128 such as an E17 type of Edison type, and has a cylindrical connection tube portion 130 in which a screw thread is formed in a spiral shape.
An end plate 131 is formed at one end of the connection cylinder 130, and a notch is formed from the center of the end plate 131 to a part of the periphery.
132 is formed, and an insertion hole 133 is formed near the notch 132.

The pair of socket terminals 118a and 118b have an intermediate portion joined and arranged on the terminal engaging portion 124, and a holding projection 13 held in the terminal engaging groove 125 near one end thereof.
4 is formed, and at one end, an arc-shaped engaging portion 135 protruding upward from the terminal engaging groove 125 is formed. At the other end of one of the socket terminals 118a, a connection piece 136 is formed which is inserted into the socket cylinder 122 through the communication portion 126 and is coupled to the receiving member 117. The connection piece 136 has an insertion hole 13 formed therein.
7 is formed. The other end of the other socket terminal 118b is passed through the outer end portion of the socket tube portion 122 through the socket tube portion 12b.
A contact piece 138 is formed in the notch 132 of the metal receiving member 117 in a non-contact state, and an insertion hole 139 is formed at the base end of the contact piece 138.

The socket cover 119 is made of insulating synthetic resin and covers the upper surface of the terminal engaging portion 124.
The terminal cover 140 has an end plate portion 141 for covering an end surface of the socket tube portion 122. The terminal cover portion 140 has a distal end formed with a projection 142 for engaging with the terminal holding portion 123.
An insertion hole 143 is formed below 141. End plate 141
The insertion holes 137, 13 of the socket terminals 118a, 118b
Attachment holes (not shown) are formed at positions 9.

In order to assemble the lamp socket 115, the mounting screw 144 passed through the insertion hole 139 of the other socket terminal 118b is screwed and attached to the inner surface of the socket cover 119, and the insertion holes 133 and A mounting screw 145 passed through the insertion hole 137 of one of the socket terminals 118a is screwed into the inner surface of the socket cover 119 to be integrally attached,
As a result, the socket 117 is electrically connected to the one socket terminal 118a, and the contact piece 138 of the other socket terminal 118b is arranged in a non-contact state with the notch 132 of the socket 117. The receiving member 117 attached to the socket cover 119 is inserted into the socket tube portion 122 from the outside, and the holding projections 134 of the socket terminals 118a and 118b are engaged with the terminal engagement grooves 125 of the terminal holding portion 123, respectively. Protrusion 142 on socket cover 119
Is engaged with the terminal holding portion 123, and the mounting screw 146 passed through the insertion hole 143 of the socket cover 119 is screwed into the mounting hole 127 of the socket tube portion 122 for mounting. The lamp socket 11
The assembling order of 5 is not limited to this order.

In order to mount the lamp socket 115 assembled as described above on the reflector 102, the shaft portions 121 on both lower sides of the socket holder 116 are connected to the respective bearing grooves on both lower sides of the socket mounting recess 110 of the reflector 102. A push plate 147 that engages with the upper surface of the bearing groove 113 and closes the upper surface of the bearing groove 113 is disposed on the mounting base 112, and a mounting screw 149 that passes through the insertion hole 148 of the push plate 147 is attached to the mounting hole of the mounting base 112. Screw it to 114 and attach it.

In this manner, the lamp socket 115 attached to the reflector 102 has a lamp lighting position in which the lamp connection direction is substantially parallel to the irradiation opening 104 of the reflector 102 with the shaft 121 as a fulcrum. The lamp is rotatably supported at a vertical lamp attaching / detaching position which is substantially perpendicular to the opening 104. The lamp lighting position of the lamp socket 115 is regulated by the upper surface of the terminal holding portion 123 being in contact with the upper edge of the opening 111, and is held by engagement with an engaging terminal 168 described later.

An annular pedestal 150 is formed above the reflector 102, and a projection 151 is formed on the pedestal 150 to protrude above the socket mounting recess 110. On the upper surface of the pedestal 150, a pair of recesses 152 are formed on both sides of the center line passing through the protrusion 151, and each recess 15 is formed.
A concave terminal fitting portion 153 is formed at an end facing the second protrusion 151. Each terminal fitting 153 has a mounting hole on the inner diameter side.
154 is formed, and a space 15 penetrating vertically in the outer diameter side
5 is formed. A mounting hole 156 is formed on the upper surface of the partition between the two spaces 155.

Terminal mounting portions 157 are formed at symmetrical positions of the end of the one concave portion 152 on the side opposite to the protruding portion 151 and the end of the other concave portion 152 on the side of the protruding portion 151, respectively. A mounting hole 158 and a protrusion 159 are formed in 157, and a protrusion 160 is formed in the other terminal mounting portion 157.

A pair of hook-type power receiving terminals 161 are mounted on each terminal mounting portion 157 concentrically around the guide projection 184. The hook-type power receiving terminal 161 is made of conductive metal and has a mounting portion 163. The hook-type power receiving terminal 161 is raised from an outer edge portion of the mounting portion 163, and is directed inward.
4 is bent to form a substantially L-shaped hooking piece 165. The mounting portion 163 has an insertion hole 166 and a fitting hole 167. The hooking claw 164 is formed in a chevron shape projecting to the lower surface side.

An engaging terminal 168 is attached to each terminal fitting portion 153. The engagement terminal 168 has a mounting piece 169 fitted on the terminal fitting part 153, and a mounting hole 170 is formed in the mounting piece 169. A connecting piece 171 is formed to bend into the space 155, and the socket terminal 118a, 118b is provided at the tip of the connecting piece 171.
An arc-shaped engaging portion 172 is formed so as to be able to engage with the engaging portion 135.

A conductive plate 173 for connecting one hook-type power receiving terminal 161 and the engaging terminal 168 is provided on one concave portion 152 side. The conductive plate 173 is formed in a semicircular shape along the concave portion 152, and has an insertion hole 174 and a fitting hole 175 formed at one end connected to the hook type power receiving terminal 161.
8 has an insertion hole 176 formed at the other end.

To incorporate each terminal component into the pedestal portion 150, a pair of engagement terminals 168 are fitted into each terminal fitting portion 153, and the fitting hole 175 of the conductive plate 173 is made to project from the one concave portion 152. Part 15
9, the conductive plate 173 is fitted into one of the recesses 152, and the fitting hole 167 of the hook type power receiving terminal 161 is fitted into the conductive plate 173.
And the hook-type power receiving terminal 161 is placed on the conductive plate 173, and the fitting hole 167 of the other hook-type power receiving terminal 161 is inserted into the other concave portion. The hook-type power receiving terminal 161 is fitted into the other recessed portion 152 by fitting into the projection 159 of the other. Insertion hole for one hook-type power receiving terminal 161
166 and the mounting screw 17 passed through the insertion hole 174 of the conductive plate 173
7 is screwed into the mounting hole 158 of one of the recesses 152 and fastened together.
A mounting screw 178 that has passed through the insertion hole 166 of the other hook-type power receiving terminal 161 and the insertion hole 174 of the other engagement terminal 168 is screwed together with the mounting hole 154 of the terminal fitting portion 153, and tightened together.
A mounting screw 179 that has passed through the insertion hole 176 of the first fitting terminal 168 and the insertion hole 174 of the one engagement terminal 168 is screwed into the mounting hole 154 of the terminal fitting portion 153 and fastened together. Further, the terminal cover 180 is fitted into the protrusion 151, and the mounting screw 182 inserted through the insertion hole 181 of the terminal cover 180 is screwed into the mounting hole 156 of the protrusion 151.

Then, by incorporating each terminal component into pedestal portion 150, one hook-type power receiving terminal 161 and one engagement terminal 168 are electrically connected through conductive plate 173, and the other hook-type power receiving terminal 161 is connected. And the other engagement terminal 168 are in direct contact and electrically connected.

When the lamp socket 115 is in the lamp lighting position, the socket terminals 118a and 118b and the engagement terminals 16
8 are engaged and electrically connected and held, and when the lamp socket 115 is rotated to the lamp attaching / detaching position, the socket terminals 118a and 118b are separated from the engaging terminals 168, and the electrical connection is released. Is done. Therefore, socket terminal 11
The electrical connection means 183 is composed of the engagement terminals 8a and 118b and the engagement terminal 168.

On the top of the reflector 102, a guide projection 184 projecting upward is formed, and a plurality of ventilation holes 185 are formed on the side of the guide projection 184.

The inner surfaces of the reflector 102 and the flange body 103 may be formed as mirror surfaces or white surfaces, or only the inner surface of the flange body 103 may be formed as a black surface.

Next, the operation of the first embodiment will be described.

In order to construct the downlight, first, FIG.
9 and FIG. 9, a power supply line and, if necessary, a feeder wiring are drawn out from an embedded hole 2 formed in advance in the ceiling plate 1,
These core wires are distributed to the electric wire insertion holes 73 of the terminal block 63 of the lighting fixture mounting base 11 of the base, and inserted and connected respectively.

The frame 22 of the lamp body mounting base 11 is inserted into the embedding hole 2 from below and pushed up. At this time, the feed screw is set so that there is a gap equal to or greater than the thickness of the ceiling plate 1 between the lower end and the flange portion 23 when each of the locking members 39 swings to the non-engagement position approaching the frame portion 22 side. The locking body 39 is moved upward by rotating the 37. However, the locking member 39 is not engaged with the upper guide piece portion 47, and the locking member 39 is in a state of protruding to a position where the side of the frame portion 22 can be engaged.

When the frame portion 22 of the lamp body mounting base 11 is inserted into the embedding hole 2, each locking member 39 protruding to the side of the frame portion 22 comes into contact with the inner edge of the embedding hole 2, and The insertion of the embedding hole 2 is continued while the locking member 39 is pushed to the non-engagement position against the urging of the forcing.

When the lower end of each locking member 39 comes off from the upper end of the embedding hole 2, the locking member 39 pushed to the non-engagement position by the bias of the spring 40 is moved to the side of the frame 22. Protrudes to an engageable position. Therefore, even if the lifting of the lamp body mounting base 11 is released, the pair of locking members 39 abut on the ceiling plate 1, and the lamp body mounting base 11 is temporarily fixed to the ceiling plate 1, and You can release your hand.

A tool such as a screwdriver is engaged with an engaging portion 49 facing the feed screw 37 through the lamp body inserting portion 28 inside the lamp body mounting base 11 and the feed screw 37 is rotated. The locking body 39 is lowered relative to the lamp body mounting base 11, that is, the locking body 39 abutting on the ceiling plate 1
The lighting fixture mounting base 11 is raised. This allows
The flange portion 23 is joined to the ceiling plate 1, the ceiling plate 1 is sandwiched between the locking member 39 and the flange portion 23, and the lamp body mounting base 11 is fixed to the ceiling plate 1.

Next, the lamp body 12 is inserted into the lamp body insertion portion 28 of the lamp body mounting base 11 from below and pushed up. At this time, the lamp
The orientation of the lamp body 12 with respect to the lamp body mounting base 11 is such that the lamp socket 115 of the lamp body 12 matches the opening 27 of the lamp body mounting base 11, that is, the pair of hook-type power receiving terminals 161 of the lamp body 12 and the lamp body mounting base 11. The orientation of the hook-type power supply terminal 82 coincides with that of the hook-type power supply terminal 11. In addition, if the lamp socket 115 is rotated to the vertical lamp attaching / detaching position which is almost perpendicular to the irradiation opening 104, the lamp socket 115 does not protrude to the side of the lamp body 12, so that the lamp body 12 is in a horizontal posture. The lamp body can be inserted into the lamp body insertion portion 28 of the lamp body mounting base 11 from below. It should be noted that the lamp insertion portion 28 of the lamp mounting base 11 is kept in a state where the lamp socket 115 is in a horizontal lamp lighting position substantially parallel to the irradiation opening 104.
When inserting the lamp socket 115, insert the lamp socket 115 into the lamp insertion part 28 of the lamp mounting base 11 with the tip protruding to the side of the lamp facing upward. The lamp body 12 is turned to a horizontal posture in a state where the lamp body 12 faces the opening 27 of the lamp body 11, and thereafter the lamp body 12 is inserted from below into the lamp body insertion portion 28 of the lamp body mounting base 11 in the horizontal posture.

Then, when the lamp body 12 is inserted into the lamp body insertion base 28 of the lamp body 12 to the far side of the lamp body insertion portion 28, a guide projection 184 protruding from the top of the lamp body 12 is formed on the annular portion 62 of the lamp body mounting base 11. A pair of hook-type power receiving terminals 16 of the lamp body 12 are fitted into the guide holes 61.
1 and a pair of hook-type power supply terminals 82 of the lamp body mounting base 11 are positioned.

The pair of hook-type power receiving terminals 16 of the lamp body 12
1 is engaged with a pair of hook type power supply terminals 82 of the lamp body mounting base 11. That is, first, each hook type power receiving terminal 161 is inserted into the inside of the annular portion 62 through the insertion hole 79 of each engaging hole 77, and the hook claw 164 at the upper end of each hook type power receiving terminal 161 is connected to each hook type power supply terminal. It is moved above the locking projection 84 of 82. In this inserted state, the lamp body 12 is rotated clockwise as viewed from the bottom surface, and the hook claws 164 of each hook-type power receiving terminal 161 climb over the locking projection 84 of each hook-type power supply terminal 82. At the same time, the hook piece 165 of each hook type power receiving terminal 161 is
Is moved to the slot 78. The rotation of the lamp body 12 is regulated by the hook pieces 165 of each hook type power receiving terminal 161 abutting against the end of the slot 78 of each engagement hole 77. And the light 12
Release the push-up of each hook-type power receiving terminal 16
The first hooking claw portion 164 engages with the engaging recess 85 of each hooking type power supply terminal 82 and presses against the lamp body 12 under its own weight. Therefore, the engagement between the hook-type power supply terminal 82 and the hook-type power receiving terminal 161 allows the lamp body mounting base 11 and the lamp body 12 to be simultaneously mechanically locked and electrically connected.

When the lamp socket 115 is turned to the lamp attaching / detaching position and the lamp body 12 is mounted on the lamp body mounting base 11, the lamp socket 115 is turned to the lamp lighting position. By rotating the lamp socket 115 to the lamp lighting position, the socket terminal on the lamp socket 115 side is rotated.
The engaging terminals 118a and 118b and the engaging terminal 168 on the side of the lamp body 101 are engaged and electrically connected, and the engagement holds the lamp socket 115 at the lamp lighting position.

As described above, the steps of connecting the power supply line and the feed wiring to the lamp body mounting base 11, fixing the lamp body mounting base 11 to the ceiling plate 1, and mounting the lamp body 12 on the lamp body mounting base 11. The construction can be performed more easily, and the labor and time required for the construction can be reduced.

Moreover, the hooking claws of each hooking type power receiving terminal 161
Since the 164 is joined to the upper surface of each hook-type power supply terminal 82 and hooked, the locking state can be stabilized as compared with the conventional locking structure using a leaf spring. In addition, lighting
The hook weight 16 of each hook-type power receiving terminal 161
4 is pressed against the upper surface of each hook-type power supply terminal 82,
The contact pressure between each hook type power receiving terminal 161 and each hook type power supply terminal 82 is high, and electrical connection can be ensured. In addition, since the hooking type power supply terminal 82 is provided with the locking projection 84, the hooking claw 164 of each hooking type power receiving terminal 161 that presses against the upper surface of each hooking type power supply terminal 82 is fitted into the insertion hole 79. Even if the lamp body 12 is rotated so as to move in the direction, the hooking claw 164 abuts on the locking projection 84 to restrict the movement, so that the lamp body 12 is inadvertently moved. Never fall off.

When the lamp 129 is to be replaced, the lamp socket 115 is rotated to a vertical lamp mounting / dismounting position which is substantially perpendicular to the irradiation opening 104, so that the lamp 129 is moved through the irradiation opening 104. Can be easily attached and detached. Then, by rotating the lamp socket 115 to the lamp attaching / detaching position, the electrical connection between the lamp socket 115 and the hook type power receiving terminal 161 can be automatically released by the electric connection means 183.
Lamp 12 with no power applied to lamp socket 115
9 can be replaced.

In order to remove the lamp body 12 for maintenance or equipment replacement, the lamp body 12 is rotated counterclockwise as viewed from the bottom while pushing up the lamp body 12 so that each hook-type power receiving unit is removed. The hook claw 164 of the terminal 161 is moved over the locking projection 84 of each hook-type power supply terminal 82 so as to face the insertion hole 79, and the lifting of the lamp body 12 is released and the lamp body 12 is moved downward. As a result, the hooking claws 164 of each hook-type power receiving terminal 161 are disengaged downward from the respective insertion holes 79, and the lamp body 12 is detached from the lamp body mounting base 11.
Can be detached downward from the lamp body insertion part 28 of FIG.

Therefore, it is not difficult to re-attach the lamp 12 with the detaching operation of the lamp 12, and the lamp 12 can be easily attached and detached, so that maintenance can be easily performed.

When the lamp body mounting base 11 is detached from the ceiling plate 1 for maintenance or replacement of the equipment, the moving body 38 is moved upward (embedding direction) by operating the feed screw 37. The locking body 39 is raised relatively to the lamp body mounting base 11 so that the ceiling
Is released, and by further moving the moving body 38 upward, the outer surface of the locking body 39 is engaged with the guide piece 47,
The locking piece 39 is moved to a non-engagement position where the locking piece 39 approaches the frame portion 22 side by the guide piece portion 47. Therefore, the lighting fixture mounting base 11
Is moved downward, the lamp body mounting base 11 can be easily removed from the embedding hole 2 of the ceiling plate 1.

Accordingly, it is not difficult to re-attach the lamp body mounting base 11 with the operation of removing the lamp body mounting base 11, and the lamp body mounting base 11 can be easily attached / detached, so that maintenance is easy. I can do it.

As described above, by inserting the frame portion 22 of the lamp body mounting base 11 into the embedding hole 2 of the ceiling plate 1, even if the locking member 39 is advanced to the side of the frame portion 22, The locking body 39 abuts on the inner edge of the embedding hole 2 so that it can be inserted while retracting to the non-engaging position.
Is moved forward by the spring 40 to an engageable position on the side of the frame portion 22, so that the locking body 39 is engaged with the back side of the ceiling plate 1 and the lamp body mounting base 11 can be temporarily fixed. In addition, by operating the feed screw 37 in the temporarily fixed state, the locking member 39 is operated.
The ceiling plate 1 can be sandwiched and attached between the ceiling plate 1 and the flange portion 23, and the workability can be improved.

Further, the locking member 39 can be moved along the embedding direction of the frame portion 22 and the locking member 39 is moved to the upper end portion in the embedding direction so that the guide piece portion 47 allows the locking member 39 to move. With the movement of the locking body 39, the locking body 39 is retracted, the locking body 39 projects, and the ceiling plate 1
Can be reliably performed.

Further, the locking member 39 can be moved along the embedding direction of the frame portion 22, and the other end is turned to the non-engagement position and the engageable position with one end in the embedding direction as a fulcrum. As a result, the locking body 39 can be smoothly retracted to the non-engaged position.

The guide projection 184 provided on the top of the lamp body 101 of the lamp 12 allows the lamp body mounting base 11 to be easily assembled and the guide projection 18.
4, a pair of hook-type power receiving terminals 161 provided concentrically with respect to 4 can be easily positioned with respect to the hook-type power supply terminals 82 on the lamp body mounting base 11 side, and the workability of the lamp body 12 can be improved.

Further, the hook type power receiving terminal 161 is
Since it is provided in the vicinity of 184, the positioning accuracy of the hook type power receiving terminal 161 can be improved.

The guide hole 61 provided on the top of the frame 22 of the lamp body mounting base 11 allows the lamp 12 mounted on the frame 22 to be easily assembled.
A pair of hook-type power supply terminals 82 provided concentrically around the guide hole 61 and the hook-type power receiving terminals 161 on the lamp body 12 side can be easily positioned, and the workability of the lamp body 12 with respect to the lamp body mounting base 11 can be improved. Can be improved.

Further, the annular portion 62 is provided at the top of the frame portion 22 around the guide hole portion 61, and the hook-type power supply terminal 82 is provided in the annular portion 62, so that the material used for the frame portion 22 can be reduced. The concentric arrangement of the pair of hook-type power supply terminals 82 around the guide hole 61 can be facilitated.

Further, since the terminal block 63 is provided on the top of the frame 22, a special terminal block is not required separately, so that the number of parts can be reduced and the configuration can be simplified.

Next, FIG. 10 shows a lamp 12 according to the second embodiment.
FIG.

The lamp body 12 of this embodiment has a vertical shape in which the lamp connection direction is perpendicular to the irradiation opening 104. The guide projection 184 at the top of the lamp body 12 extends upward, and this guide projection
Place lamp socket 201 inside 184, and guide protrusion 1
Insert the mounting screw 202 passed through from above
And fix it. A pair of lead wires 203 led out from the lamp socket 201 is connected to each hook-type power receiving terminal 161.

The vertical lamp body 12 is attached to the lamp body mounting base 11 as in the case of the shallow lamp body 12, and has the same operation and effect.

The lamp body 12 includes a lamp mounting base 11.
If the light-receiving terminal 161 is provided and can be inserted into the lamp-body insertion portion 28, various lamps 12 can be mounted on the lamp-mounting base 11. Therefore, the lighting fixture mounting base 11
If the lamp body mounting base 11 is fixed to the ceiling plate 1, various lamp bodies 12 can be selectively mounted and can be easily replaced.

Further, in each of the above embodiments, the lamp body mounting base 11 and the lamp body 12 have a separate structure, but a lighting fixture having an integral structure may be formed. In this case, basically, in addition to the configuration of the lamp body mounting base 11, by providing a reflector supported by the frame portion 22 and a lamp socket disposed in a predetermined positional relationship with respect to the reflector. The same operational effects as those of the above-described embodiment can be obtained.

[0095]

According to the lamp body mounting base of the first aspect, when the locking portion is moved to a predetermined position, the locking portion is retracted to a non-engagement position with respect to the mounting surface against elasticity, The locking portion does not hinder the embedding of the frame portion on the mounting surface, and if the locking portion is moved to a position deviated from the predetermined position after the embedding of the frame portion, the locking portion is moved to the mounting surface. Since it can be deployed to the engageable position by elasticity, the workability can be improved.

According to the lamp body mounting base of the second aspect,
In addition to the effects of the lamp body mounting base according to claim 1, the locking portion is movable along the embedding direction of the frame portion, and the locking portion is moved to an end portion in the embedding direction to retract. Since the locking portion is retracted by the means, the respective operations of retracting the locking portion, projecting the locking portion, and clamping the mounting surface by the locking portion can be reliably performed as the locking portion moves.

According to the lamp body mounting base of the third aspect,
In addition to the effect of the lamp body mounting base according to claim 1 or 2, when the frame portion is embedded in the mounting surface, the locking portion contacts the mounting surface even if the locking portion protrudes to the side of the frame portion. Thereby, the locking portion can be embedded in the non-engaging position while being retracted against the elasticity, and furthermore, the locking portion passing through the mounting surface is detached from the mounting surface, so that the locking portion is engaged. Since the frame is deployed to the fitting position by elasticity, the frame portion can be temporarily fixed to the mounting surface, and the workability can be improved.

According to the lamp body mounting base of the fourth aspect,
In addition to the effect of the lamp body mounting base according to any one of claims 1 to 3, when the frame portion is embedded in the mounting surface, even if the locking portion protrudes to the side of the frame portion, the locking portion is in contact with the mounting surface. By abutting, the locking portion can be embedded in the non-engaging position while being retracted against the elasticity, and furthermore, the locking portion that has passed through the mounting surface is detached from the mounting surface. Is deployed elastically to the engageable position, the frame portion can be temporarily fixed to the mounting surface, and the workability can be improved. Moreover, the locking portion is movable along the embedding direction of the frame portion, and the other end is rotated to the non-engagement position and the engageable position with one end in the embedding direction as a fulcrum. The retracting of the locking portion to the non-engaging position can be performed smoothly.

According to the lamp body mounting base of the fifth aspect,
In addition to the effect of the lamp body mounting base according to any one of claims 1 to 4, elasticity can be given to the locking portion by the urging means.

According to the lighting fixture of the sixth aspect, since the lighting fixture according to any one of the first to fifth aspects and the lamp which is detachably attached to the lighting fixture mounting base are provided, Performance can be improved.

According to the illuminating device of the present invention, when the locking portion is moved to a predetermined position, the locking portion is retracted to a non-engagement position with respect to the mounting surface against elasticity, and the frame is mounted. The locking portion does not hinder the embedding into the surface, and if the locking portion is moved to a position deviated from a predetermined position after the frame portion is embedded, the locking portion can be engaged with the mounting surface. Because it can be deployed by elasticity, workability can be improved.

According to the lighting device of the eighth aspect, in addition to the effect of the lighting device of the seventh aspect, the locking portion can be moved along the embedding direction of the frame portion and the locking portion can be moved. Since the locking portion is retracted by the retracting means by moving the locking portion to the end in the embedding direction, with the movement of the locking portion, the locking portion is retracted, the locking portion protrudes, and the mounting surface is locked by the locking portion. Each operation of pinching can be reliably performed.

According to the illuminating device of the ninth aspect, in addition to the effect of the illuminating device of the seventh or eighth aspect, when the frame portion is embedded in the mounting surface, the locking portion protrudes to the side of the frame portion. Even when the locking portion comes into contact with the mounting surface, the locking portion can be embedded in the non-engaging position while being retracted against the elasticity, and furthermore, the locking portion passing through the mounting surface can be mounted. By detaching from the surface, the locking portion is elastically deployed to the engageable position, so that the frame portion can be temporarily fixed to the mounting surface, and the workability can be improved.

According to the luminaire of the tenth aspect, in addition to the effects of the luminaire of any one of the seventh to ninth aspects,
When the frame part is embedded in the mounting surface, even if the locking part protrudes to the side of the frame part, the locking part abuts the mounting surface, so that the locking part resists the elasticity to the disengaged position. Can be embedded while being retracted, and when the locking portion that has passed through the mounting surface is detached from the mounting surface, the locking portion is elastically deployed to the engageable position. It can be stopped and workability can be improved. Moreover, the locking portion is movable along the embedding direction of the frame portion, and the other end is rotated to the non-engagement position and the engageable position with one end in the embedding direction as a fulcrum. The retracting of the locking portion to the non-engaging position can be performed smoothly.

According to the lighting apparatus of the eleventh aspect, in addition to the effect of the lighting apparatus of any of the seventh to tenth aspects, elasticity can be imparted to the locking portion by the urging means.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a disassembled state of a lamp body mounting base and a lamp body of a downlight according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the lamp body mounting base according to the embodiment in an exploded state.

FIG. 3 is a perspective view of the lamp body of the embodiment in an exploded state.

FIG. 4 is a bottom view of the lamp body mounting base of the embodiment.

FIG. 5 is a plan view of the lamp according to the embodiment.

FIG. 6 is a sectional view taken along line AA of FIG. 5 of the embodiment.

FIG. 7 is a cross-sectional view corresponding to FIG. 6, in which the lamp socket shown in FIG. 6 of the embodiment is rotated to a lamp attaching / detaching position.

FIG. 8 is a side view of the downlight according to the embodiment in an installed state.

FIG. 9 is a side view corresponding to FIG. 8 and showing a cross section of the base shown in FIG. 8 of the embodiment.

FIG. 10 is a perspective view of a lamp body showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceiling board as a mounting surface 11 Lighting body mounting base 12 Lighting body 22 Frame part 23 Flange part as an engagement part 37 Feed screw 39 Locking body as a locking part 40 Spring as urging means 47 Spring as retreating means Guide piece

Claims (11)

[Claims] 1. A frame portion embedded in a mounting surface, an engaging portion disposed on the frame portion and engaged with the mounting surface, and a feeder operably disposed on the frame portion from the mounting surface side. And a screw, which is movably provided by operation of the feed screw, is retracted to a non-engagement position with respect to the mounting surface by movement to a predetermined position against elasticity, and is mounted by movement to a position deviated from the predetermined position. And a locking portion that is elastically deployed to a position where the mounting surface can be engaged with the surface and that can cooperate with the engaging portion to hold the mounting surface. 2. The locking portion is provided so as to be movable along the embedding direction of the frame portion, and has an end in the embedding direction at a predetermined position. 2. The lamp body mounting base according to claim 1, further comprising a retracting means for engaging and retracting the locking portion. 3. The locking portion is retracted to a non-engagement position against elasticity by contact with the mounting surface when the frame portion is embedded in the mounting surface, and is released from contact with the mounting surface. 3. The lamp body mounting base according to claim 1, wherein the lamp body mounting base is resiliently deployed to an engageable position. 4. The locking portion is provided so as to be movable along an embedding direction of the frame portion, and the other end is turned to a non-engaging position and an engageable position with one end in the embedding direction as a fulcrum. The lamp body mounting base according to any one of claims 1 to 3, wherein the lamp body mounting base is configured to be movable. 5. The lamp body mounting base according to claim 1, further comprising an urging means for urging the locking portion. 6. A lighting fixture comprising: the lamp body mounting base according to claim 1; and a lamp body detachably mounted on the lamp body mounting base. 7. A frame portion embedded in the mounting surface, an engaging portion disposed on the frame portion and engaged with the mounting surface, and a feeder operably disposed on the frame portion from the mounting surface side. And a screw, which is movably provided by operation of the feed screw, is retracted to a non-engagement position with respect to the mounting surface by movement to a predetermined position against elasticity, and is mounted by movement to a position deviated from the predetermined position. A locking portion which is elastically deployed at a position where the mounting surface can be engaged with the surface, and which is capable of clamping the mounting surface in cooperation with the engaging portion; a reflector supported by the frame portion; And a lamp socket arranged in a predetermined positional relationship with respect to the lighting fixture. 8. The locking portion is provided so as to be movable along the embedding direction of the frame portion, and has an end portion in the embedding direction at a predetermined position. 8. The lighting apparatus according to claim 7, further comprising a retracting means for engaging and retracting the locking portion. 9. The locking portion is retracted to a non-engaged position against elasticity by contact with the mounting surface when the frame portion is embedded in the mounting surface, and is released from contact with the mounting surface. 9. The lighting device according to claim 7, wherein the lighting device is elastically deployed to a position where the lighting device can be engaged. 10. The locking portion is provided so as to be movable along the embedding direction of the frame portion, and the other end is turned to the non-engagement position and the engageable position with one end in the embedding direction as a fulcrum. The lighting device according to claim 7, wherein the lighting device is configured to be movable. 11. The lighting apparatus according to claim 7, further comprising an urging means for urging the locking portion.