JP4324027B2 - Mounting structure for recessed lighting fixtures - Google Patents

Description

  The present invention relates to a mounting structure for fixing an embedded lighting fixture in an embedded hole formed in a ceiling, a shelf board or the like.

A technique for inserting and fixing an embedded lighting fixture generally referred to as a downlight into an embedding hole formed in a ceiling surface or the like is to slide the lower edge flange portion of the lighting fixture and the outside of the lighting fixture. A structure (for example, Patent Documents 1 and 2) in which a ceiling plate is sandwiched between and fixed to a mounting bracket that is movably mounted, or a leaf spring or a bar spring that is mounted so as to project outside the lighting fixture, A structure (for example, Patent Documents 3 to 6) that is elastically hooked and fixed to a plate is known.
Japanese Examined Patent Publication No. 56-042087 Japanese Patent Laid-Open No. 02-288012 Japanese Patent Laid-Open No. 56-086405 Japanese Patent Laid-Open No. 04-062709 Japanese Patent Laid-Open No. 06-290623 Japanese Patent Laid-Open No. 07-282607

  Among the conventional mounting structures described above, those using mounting brackets are configured to operate the mounting bracket by inserting a fingertip into the interior of the lighting fixture after inserting the lighting fixture into the embedded hole. For this reason, the mounting operation is troublesome, and it is necessary to secure a space enough to operate the mounting bracket by moving the fingertip to the inside of the lighting apparatus, which becomes a restriction when the apparatus body is downsized.

  Moreover, it is difficult for the thing using a leaf | plate spring and a bar spring to make the deformation | transformation state of a spring correspond so that the attachment state of a lighting fixture may be stabilized with respect to the thickness of various ceiling boards. Furthermore, since a space that can deform the spring is required between the inner peripheral surface of the embedding hole and the luminaire, it is also a limitation on downsizing.

  This type of embedded luminaire may be attached not only to a ceiling board but also to a shelf board of furniture such as a cupboard or a living board. In such an aspect, it is necessary to further reduce the size and thickness of the lighting fixture, and it is necessary to employ a mounting structure in which mounting brackets and springs do not protrude from the upper surface of the shelf board.

  The present invention has been made in view of such circumstances, and provides a mounting structure that is particularly suitable for reducing the size and thickness of an embedded lighting fixture.

  In order to achieve the above-described object, the mounting structure for an embedded luminaire according to the present invention cuts the side surface of the outer frame body into an outer frame body having a substantially cylindrical shape that can be inserted into the mounting hole of the mounting surface. In addition, a substantially strip-shaped movable piece having one end in the circumferential direction as a free end is provided, and the movable piece is formed so that the thickness gradually increases from the fixed end side continuous to the outer frame body toward the free end side. A protrusion that can contact the inner surface of the movable piece is provided on the side surface of the lamp body that is mounted inside the outer frame body. When the lamp body is rotated inside the outer frame body, the protrusion is pushed out by the protrusion section. The movable body is configured so that the free end of the movable piece protrudes outward and is pressed against the inner peripheral surface of the embedding hole, so that the lamp body and the outer frame body are fixed to the embedding hole. And

  That is, the present invention provides a movable piece that is elastically deformable by cutting out a part of the side surface of the outer frame body that is substantially cylindrical of the outer frame body. It is made to press-contact with. According to this, since it is not necessary to attach a complicated mounting bracket or spring to the outer frame body, the structure of the outer frame body or the lamp body is simplified. Also, since the mounting bracket and spring do not protrude above the outer frame body, the height required for mounting is within the range of the thickness of the outer frame body, which is advantageous for making the embedded lighting fixture thinner. Become. In this configuration, “cutting out the side surface of the outer frame body” is not limited to the step of cutting after the outer frame body is formed in a cylindrical shape, but the movable piece and the outer frame having the above-described form A step of integrally forming the cylindrical portion of the body in advance is included.

  The outer surface of the movable piece is preferably subjected to a rough surface treatment such as embossing in order to increase the frictional resistance against the inner peripheral surface of the embedding hole. A plurality of extending ridges may be formed. The vertical cross-sectional shape of the ridge can be selected from an appropriate shape such as a saw-blade shape or a trapezoidal shape in which mountains and valleys are continuous. As a result, the frictional resistance between the movable piece and the embedded hole is increased, and the mounting state can be stabilized.

  Further, the movable piece may be provided at least in one place in the circumferential direction of the outer frame body. However, in order to improve the structural balance, the movable pieces are formed in the same direction at substantially equal intervals on a plurality of side surfaces of the outer frame body. More preferably.

  Similarly, it is preferable to increase the frictional resistance of both the inner surface of the movable piece and the tip end surface of the protrusion that contacts the movable piece by subjecting at least one of them to a rough surface treatment for preventing slippage. Alternatively, an engaging convex portion and an engaging concave portion that are engaged in stages according to the rotation angle of the lamp body may be formed on both the inner surface of the movable piece and the tip end surface of the protruding portion that contacts the movable piece. Good. As long as an engagement convex part and an engagement recessed part are the shapes which mutually engage, any may be an outer side (movable piece side) and any may be an inner side (projection part side).

  Further, the protrusion is provided with a spring protrusion that elastically protrudes from the front end surface thereof, and the engagement recess is engaged with the inner surface of the movable piece in a stepwise manner according to the rotation angle of the lamp body. May be formed.

  If these engagement means are adopted, when the lamp body is rotated, it is possible to feel the response that the engaging convex part and the engaging concave part engage in a stepwise manner, and the lamp main body is removed after installation. It is also possible to prevent the mounting state from becoming loose by loosening in the direction.

  In addition, a lamp support piece that protrudes inward along the lower edge of the movable piece is formed so that the projection of the lamp body is held on the lamp support piece, thereby preventing the lamp body from falling off. The mounting state is further stabilized.

  The mounting structure according to another configuration of the present invention includes an outer frame body having a substantially cylindrical shape that can be inserted into an embedding hole of the mounting surface, and the side surface of the outer frame body is cut out in the axial direction, and the upper end is a free end. A plurality of movable pieces are provided adjacent to each other, and these adjacent movable pieces are formed so as to gradually increase in thickness along the circumferential direction of the outer frame body, and are mounted on the inner side of the outer frame body. When a projection that can contact the inner surface of the movable piece is provided on the side of the lamp body, and the lamp body is rotated inside the outer frame, the free end of the movable piece that is pushed out by the projection is outward. The lamp body and the outer frame body are fixed to the embedded hole by projecting to the inner peripheral surface of the embedded hole and being pressed against the inner peripheral surface of the embedded hole. Also with this configuration, the same effects as those of the above-described invention can be obtained.

  According to the mounting structure of the embedded lighting fixture of the present invention configured as described above, the outer frame body and the lamp body can be connected with a simple structure without mounting a complicated mounting bracket or spring on the outer frame body. It can be reliably and easily fixed to the embedding hole. Since there is no need for a space for operating the mounting bracket and spring, the space efficiency inside the instrument is also improved.

  In addition, according to the present invention, the embedded lighting fixture can be mounted within the range of the height of the outer frame, so that the member protrudes upward even for a thin plate such as a shelf board of furniture. Without attaching, it can be installed neatly. For example, when a recessed lighting device is attached to a ceiling surface, even if a field material is arranged directly above the ceiling panel, the embedded lighting device can be used as a field material as long as the ceiling panel has sufficient thickness. You don't have to worry about interfering with. Even if the depth of the embedding hole formed in the installation surface is larger than the height of the outer frame body, in the present invention, it is not necessary to project a part of the outer frame body on the back side of the installation surface. It becomes possible to install.

  As described above, the present invention has a very advantageous structure for reducing the size and thickness of the embedded lighting fixture.

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

  FIGS. 1-17 shows each part of the embedded lighting fixture which employ | adopted the attachment structure of this invention.

  The illustrated embedded lighting fixture 1 is a small-diameter / thin downlight designed to be mounted on a shelf board of furniture or the like. The embedded lighting device 1 is housed inside an outer frame body 2 (FIGS. 1 to 4) inserted into an embedding hole H formed on a mounting surface such as a shelf board, and the outer frame body 2. It is comprised by the lamp main body 3 (FIGS. 5-8) and the inner frame 4 (FIGS. 13-14) with which the outer frame 2 and the lamp main body 3 are mounted | worn.

  The outer frame body 2 includes a substantially cylindrical tube portion 21, a flange portion 22 projecting outward from the lower peripheral edge of the tube portion 21, and a heat dissipation cover 23 having a radial gap. The tube portion 21 and the flange portion 22 are integrally formed of a heat-resistant and moderately flexible synthetic resin or the like, and the heat dissipation cover 23 is formed of, for example, a heat-resistant resin or an aluminum alloy, and the tube portion 21. It is fitted on the top of the.

  The lamp body 3 is provided with a socket 33 to which a small light source 32 such as a mini-halogen bulb can be attached and a downward reflecting mirror surface 34 on a substantially cylindrical body case 31 made of, for example, an aluminum alloy. Is formed. However, in the present invention, the internal structure of the lamp body 3 and the type of the light source are not particularly limited.

  The inner frame body 4 is fitted with a substantially cylindrical frame portion 41 formed of a synthetic resin having heat resistance and moderate flexibility, and a heat dissipation gap provided on the lower opening surface of the frame portion 41. A heat-resistant glass cover 42, the outer diameter of the frame portion 41 is formed so as to substantially match the inner diameter of the cylindrical portion 21 of the outer frame body 2, and the outer frame body 2 and the lamp are viewed from the lower side of the lamp body 3. It is mounted between the main body 3.

  The main part of the present invention is a structure for fixing the outer frame body 2 and the lamp body 3 in the embedded hole H. Hereinafter, this point will be described in detail.

  As shown in FIGS. 2 to 4, the cylindrical portion 21 of the outer frame body 2 is provided with a movable piece 24 having a substantially U-shaped side view formed by cutting out the side surface of the cylindrical portion 21. The movable piece 24 has a substantially strip shape extending from the fixed end 24a continuous to the cylindrical portion 21 to the free end 24b along the circumferential direction of the cylindrical portion 21, and from the fixed end 24a side toward the free end 24b side. It is formed so that the wall thickness gradually increases. On the outer surface of the movable piece 24, for example, a rough surface treatment such as embossing is performed, and a plurality of protrusions 25 having a substantially trapezoidal longitudinal section are formed along the circumferential direction of the cylindrical portion 21. The same rough surface treatment is also applied to the inner surface of the movable piece 24. Furthermore, in this embodiment, a plurality of shallow engagement recesses 26 extending in the axial direction of the outer frame body 2 are formed on the inner surface of the movable piece 24 at appropriate intervals.

  In the illustrated embodiment, the movable piece 24 formed over a length of about ¼ of the circumferential length of the cylindrical portion 21 is aligned at two positions facing each other across the axis of the cylindrical portion 21. Are arranged.

  On the other hand, as shown in FIGS. 5 to 8, the main body case 31 of the lamp main body 3 is provided with protrusions 36 that protrude outwardly at two locations facing each other across the axis of the main body case 31. . The width of the protrusion 36 is slightly smaller than the length of the movable piece 24. The front end surface of the protrusion 36 is a cylindrical surface having a curvature similar to the inner surface of the cylindrical portion 21 of the outer frame 2, and one side thereof is slightly tapered.

  Of the two protrusions 36, the protrusion 36 located on the opposite side of the socket 33 is formed with a vertically long notch hole at the center of the tip surface, and the spring protrusion 37 protrudes from the notch hole. The spring protrusion 37 is formed by bending a leaf spring, and is attached so that a bent portion bent in a substantially U shape when viewed from above is slightly projected and retracted from the tip surface of the protrusion 36.

  As shown in FIGS. 9 to 11, the lamp body 3 is inserted inside the outer frame body 2, and the lamp body 3 is rotated in the direction from the fixed end 24 a side to the free end 24 b side of the movable piece 24. When moved, the protrusion 36 comes into contact with the inner surface of the movable piece 24 and gradually pushes the movable piece 24 outward. Then, as shown in FIG. 12, the extruded movable piece 24 is pressed against the inner peripheral surface of the embedded hole H, and the outer frame body 2 and the lamp body 3 are fixed to the embedded hole H by the frictional force. Is done. When this embedded lighting fixture is removed, for example, due to circumstances such as replacement or repair, the lamp body 3 is rotated in the direction opposite to the above. Then, the movable piece 24 that has been pushed out returns to the inside, there is no friction with the embedded hole H, and the outer frame body 2 and the lamp body 3 can be easily extracted from the embedded hole H.

  The ridges 25 formed on the outer surface of the movable piece 24 serve to increase the frictional resistance with the embedded hole H and strengthen the mounting state. Further, the spring protrusion 37 protruding from the front end surface of the protrusion 36 engages with one of the engaging recesses 26 formed on the inner surface of the movable piece 24 in a stepwise manner according to the rotation angle of the lamp body 3. In this case, the lamp body 3 is prevented from rotating in the extraction direction after being attached and preventing the attachment state from becoming sweet.

  Such an engaging means between the movable piece 24 and the protrusion 36 is not limited to the form as illustrated, for example, a plurality of semicircular or trapezoidal protrusions extending in the axial direction on the inner surface of the movable piece 24. It may be formed as an engaging convex portion, and a plurality of concave grooves having the same cross section may be formed on the distal end surface of the protruding portion 36 to form an engaging concave portion, which may be engaged with each other.

  In the illustrated embodiment, a lamp support piece 27 projecting inward is formed along the lower edge of the movable piece 24. The lamp support piece 27 engages with the lower edge of the protrusion 36 that pushes out the movable piece 24, and prevents the lamp body 3 from falling off the outer frame body 2.

  Further, in the illustrated embodiment, two projecting pieces 38 projecting inward are formed inside the reflecting mirror surface 34 of the lamp body 3 so as to face each other with the axis of the lamp body 3 interposed therebetween. The protrusion 38 serves as a finger hook when the lamp body 3 inserted inside the outer frame 2 is rotated.

  According to such a configuration, it is not necessary to attach a complicated mounting bracket or a spring to the outer frame body 2, and the movable piece 24 can be integrally formed on the cylindrical portion 21 of the outer frame body 2, thereby simplifying the structure. Thus, the space efficiency inside the apparatus is also improved. In addition, the mounting brackets and springs do not protrude upward, and can be mounted within the height range of the outer frame 2, so there is no need to adjust the mounting method depending on the thickness of the plate material serving as the installation surface. Even a thin plate material such as a shelf plate or a plate material thicker than the height of the outer frame body 2 can be attached cleanly.

  Also on the work surface, the lamp body 3 can be attached and detached by an extremely simple operation by simply rotating the lamp body 3 inside the outer frame 2. There is no need to drill a screw hole on the installation surface. Further, since there is an appropriate degree of freedom in the dimension in which the movable piece 24 is pushed out, even if there is some variation in the inner diameter of the embedding hole H, it can be attached without being affected by it. Therefore, it is particularly suitable for the small and thin embedded lighting device 1. If the weight does not become excessively large, it can be applied to a medium-sized or larger embedded lighting fixture.

  In the above-described embodiment, the movable piece 24 of the outer frame 2 and the projection 36 of the lamp body 3 are disposed opposite to each other with the axis of the instrument interposed therebetween. As long as 36 is provided at a position corresponding to each other, it may be provided at three or more places at an appropriate interval. If the movable pieces 24 and the protrusions 36 are arranged at equal intervals in the circumferential direction, the state of attachment to the embedding hole H will be well balanced mechanically. Further, as the shape of the movable piece 24, the thickness is not changed over the entire height direction as in the above embodiment, but one or several tapered ribs are formed on the inner surface of the movable piece 24, and this taper The protrusion 36 of the lamp body 3 may be brought into contact with the rib.

  Next, a structure for attaching the inner frame body 4 to the outer frame body 2 and the lamp body 3 fixed as described above will be described.

  As shown in FIGS. 13 to 14, the inner frame body 4 is provided with an engaging portion 43 for attaching the inner frame body 4 to the outer frame body 2. The engaging portion 43 includes a base portion 44 that rises upward from the upper edge of the frame portion 41, and an engaging piece 45 that extends laterally from the upper portion of the base portion 44 and is curved with the same curvature as the peripheral surface of the frame portion 41. Yes. A fixed gap is formed between the engagement piece 45 and the upper edge of the frame portion 41. In the illustrated embodiment, the engaging portion 43 is formed integrally with the frame portion 41, and the engaging piece 45 can be bent inward and outward with appropriate flexibility. The engaging portions 43 are arranged opposite to each other so as to be oriented at two locations across the axis center in accordance with the arrangement of the movable piece 24 of the outer frame body 2 and the protrusions 36 of the lamp body 3 described above.

  On the other hand, as shown in FIGS. 3 to 4, the engaging portion 43 of the inner frame body 4 is engaged with the inner surface of the cylindrical portion 21 of the outer frame body 2 where the movable piece 24 is not provided. An engaging projection 51 is formed. One side surface (left side in FIG. 3) of the engaging protrusion 51 is a gently inclined concave surface continuous with the inner surface of the cylindrical portion 21, and the curvature of the lower half portion 52 of the concave surface is that of the upper half portion 53. As shown in FIG. 4, a step 54 is formed between the lower half 52 and the upper half 53. The length of the step 54 along the circumferential direction of the cylindrical portion 21 is approximately 1/3 to 1/2 of the length of the engagement piece 45. The inner surface of the lower half 52 is a gently inclined taper surface that gradually protrudes toward the inside of the cylindrical portion 21 as it goes upward from the opening surface side of the cylindrical portion 21.

  As shown in FIG. 4, the other side surface (right side in FIG. 3) of the engagement protrusion 51 is formed so as to protrude at a slightly steep angle with respect to the inner surface of the cylindrical portion 21. The lamp body 3 is prevented from rotating with respect to the protrusion 36 (see FIG. 11).

  The top surface of the engagement protrusion 51 that protrudes inwardly is also provided with a vertical step 55 in which the other side surface protrudes inwardly. The engaging protrusions 51 are arranged opposite to each other so as to be aligned in two positions sandwiching the axial center in accordance with the engaging portion 43 of the inner frame body 4.

  As shown in FIGS. 10 to 11, when the lamp body 3 is attached to the outer frame body 2, a gap is formed between the portion of the lamp body 3 where the protrusion 36 is not provided and the outer frame body 2. Therefore, the engaging portion 43 of the inner frame body 4 is inserted into this gap from below. Then, as shown in FIGS. 15 to 16, the engagement piece 45 is pushed in while being curved inward along the lower half 52 of the engagement protrusion 51, and the lower half 52 and the upper half of the engagement protrusion 51 are pushed. Ride on a step 54 in the circumferential direction formed between As a result, the inner frame 4 is engaged so as not to come out of the outer frame 2.

  When removing the inner frame body 4, as shown in FIG. 17, the inner frame body 4 is rotated clockwise in the figure toward the free end side of the engagement piece 45. Then, the free end of the engagement piece 45 advances to the top surface of the engagement protrusion 51 while being curved inward along the upper half portion 53 of the engagement protrusion 51, abuts against the vertical step 55, and further turns It becomes impossible to move. At this time, the free end of the engagement piece 45 is pushed into the innermost side, and the engagement piece 45 riding on the step 54 of the engagement protrusion 51 floats inward from the lower half 52 and engages. It is unwound and the inner frame 4 slides downward. In this way, the inner frame body 4 can be extracted from the outer frame body 2.

  In the illustrated form, in order to facilitate the extraction of the inner frame body 4 from the outer frame body 2, an extraction protrusion 46 is formed on the inner frame body 4 as shown in FIGS. 14 to 15. The extraction protrusion 46 rises from the upper edge of the frame portion 41 in a substantially triangular shape at a position below the engagement piece 45, and pulls the inner frame body 4 engaged with the outer frame body 2 in the extraction direction. When it is rotated, it comes into contact with the lower half 52 of the engaging projection 51, and the inner frame 4 is pushed downward by the reaction force. Thereby, even when the contact friction of an engagement location is large compared with the weight of the inner frame body 4, the inner frame body 4 can be taken out reliably.

  The attachment structure as described above facilitates the attachment / detachment of the inner frame body 4. Since the engagement piece 45 of the inner frame 4 is formed in a horizontally long shape along the circumferential direction, the structural height dimension of the engagement portion can be reduced. Therefore, it is extremely advantageous to make the embedded lighting fixture thinner.

  FIGS. 18-19 shows other embodiment regarding the attachment structure of an outer frame body and a lamp main body. This form corresponds to the configuration of the eighth aspect, and the configuration of the outer frame body 20 is different from that of the outer frame body 2 shown in the first embodiment. The configuration of the lamp body 3 is the same as that of the first embodiment.

  The outer frame body 20 is provided with a plurality of movable pieces 204 adjacent to each other, the side surfaces of which are cut out in the axial direction and whose upper ends are free ends. These movable pieces 204 are formed so as to gradually increase in thickness toward one side along the circumferential direction of the outer frame body. Then, when the lamp body 3 is mounted inside the outer frame body 20 and rotated, the projection 36 of the lamp body 3 abuts the inner surface of the movable piece and pushes the free end of the movable piece 204 outward. The free end is pressed against the inner peripheral surface of the embedded hole H, and the outer frame 20 and the lamp body 3 are fixed to the embedded hole H.

  A spring protrusion 37 protruding from the protrusion 36 of the lamp main body 3 is engaged with a gap formed between the movable pieces 204 to prevent the lamp main body 3 from loosening in the extraction direction. Further, a lamp support piece 207 projecting inward at the same height is formed inside each movable piece 204, and this lamp support piece 207 engages with the lower edge of the projection 36, and the lamp body 3 plays a role of preventing the outer frame body 20 from falling off.

  In the mounting structure configured as described above, similarly to the first embodiment, it is not necessary to attach a complicated mounting bracket or a spring to the outer frame body 20, and the movable piece 204 can be integrally formed on the outer frame body 20. As a result, the structure is simplified and the space efficiency inside the instrument is improved. In addition, since the mounting bracket and spring do not protrude upward and can be mounted within the height range of the outer frame body 20, there is no need to adjust the mounting method depending on the thickness of the plate material serving as the installation surface. Even a thin plate material such as a shelf plate or a plate material thicker than the height of the outer frame body 20 can be attached cleanly.

It is a top view of the outer frame body in the embedded type lighting fixture which employ | adopted the attachment structure of this invention. It is a side view of the said outer frame. It is A-A 'sectional drawing of the said outer frame. It is B-B 'sectional drawing of the said outer frame. It is a top view of the lamp main body in the embedded type lighting fixture which employ | adopted the attachment structure of this invention. It is a side view of the said lamp main body. It is C-C 'sectional drawing of the said lamp main body. It is a bottom view of the said lamp body. It is the figure which looked at the state which inserted the lamp main body inside the outer frame body from the B-B 'cross section of FIG. It is a figure which shows a state when a lamp main body is slightly rotated from the state of FIG. It is a figure which shows a state when a lamp main body is further rotated from the state of FIG. FIG. 12 is a cross-sectional view taken along the line D-D ′ of the outer frame body and the lamp body in the state of FIG. 11. It is a top view of the inner frame in the embedded lighting fixture. It is E-E 'sectional drawing of the said inner frame. It is a fragmentary perspective view which shows the engagement state of an inner frame body and an outer frame body. It is the figure which looked at the state when an inner frame was engaged with the outer frame from the B-B 'cross section of FIG. It is the figure which looked at the state when removing an inner frame from an outer frame from the B-B 'cross section of FIG. It is a side view of the outer frame concerning other examples of the present invention. It is a top view which shows the engagement state of the said outer frame body and the lamp main body inserted in the inner side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Embedded lighting fixture 2 Outer frame body 24 Movable piece 24a Fixed end 24b Free end 25 Projection 27 Lamp support piece 20 Outer frame body 204 Movable piece 3 Lamp body 36 Projection part 37 Spring projection 4 Inner frame body H Embedment hole

Claims (8)

An outer frame body having a substantially cylindrical shape that can be inserted into the mounting hole in the mounting surface is provided with a substantially strip-shaped movable piece having a circumferential end that is a free end by cutting out a side surface of the outer frame body. Is formed so that the thickness gradually increases from the fixed end side continuous to the outer frame body toward the free end side,
Protrusions that can contact the inner surface of the movable piece are provided on the side surfaces of the lamp body mounted inside the outer frame body. When the lamp body is rotated inside the outer frame body, it is pushed out by the projection sections. The embedded illumination is configured such that the free end of the movable piece protrudes outward and is pressed against the inner peripheral surface of the embedded hole, so that the lamp body and the outer frame are fixed to the embedded hole. Instrument mounting structure.   The mounting structure for an embedded luminaire according to claim 1, wherein a plurality of protrusions extending in the circumferential direction are formed on an outer surface of the movable piece.   The mounting structure for an embedded luminaire according to claim 1, wherein the movable pieces are formed at substantially equal intervals at a plurality of positions on the side surface of the outer frame.   2. The embedded lighting device according to claim 1, wherein at least one of the inner surface of the movable piece and the front end surface of the protrusion that contacts the movable piece is subjected to a rough surface treatment for preventing slippage. Mounting structure.   An engaging convex portion and an engaging concave portion that are engaged in stages according to the rotation angle of the lamp body are formed on both the inner surface of the movable piece and the tip end surface of the projecting portion that contacts the movable piece. The mounting structure for an embedded lighting fixture according to claim 1.   The protrusion is provided with a spring protrusion that elastically protrudes from the front end surface thereof, and an engagement recess is formed on the inner surface of the movable piece so that the spring protrusion is engaged stepwise according to the rotation angle of the lamp body. The mounting structure for an embedded luminaire according to claim 1, wherein   The embedded type according to claim 1, wherein a lamp support piece projecting inward is formed along a lower edge of the movable piece, and a projection of the lamp body is held on the lamp support piece. Mounting structure for lighting equipment. An outer frame body that has a substantially cylindrical outer shape that can be inserted into the mounting hole in the mounting surface, is cut out in the axial direction on the side surface of the outer frame body, and a plurality of movable pieces whose upper ends are free ends are provided adjacent to each other. While forming these adjacent movable pieces so that the wall thickness gradually increases along the circumferential direction of the outer frame body,
Protrusions that can contact the inner surface of the movable piece are provided on the side surfaces of the lamp body mounted inside the outer frame body. When the lamp body is rotated inside the outer frame body, it is pushed out by the projection sections. The embedded illumination is configured such that the free end of the movable piece protrudes outward and is pressed against the inner peripheral surface of the embedded hole, so that the lamp body and the outer frame are fixed to the embedded hole. Instrument mounting structure.

Images