EP2846076A1

EP2846076A1 - Lighting system

Info

Publication number: EP2846076A1
Application number: EP14159823.5A
Authority: EP
Inventors: Osamu Ebisawa
Original assignee: Toshiba Lighting and Technology Corp
Current assignee: Toshiba Lighting and Technology Corp
Priority date: 2013-09-04
Filing date: 2014-03-14
Publication date: 2015-03-11
Also published as: JP2015050171A; CN104421780A

Abstract

In fixing sections (60a to 60c), spring leg sections (60a2-3L, 60a2-3R to 60c2-3L, and60c2-3R) of spring sections (60a2 to 60c2) assembled to pedestal sections (60a1 to 60c1) are fit in predetermined grooves of attaching sections (33a to 33c) of a decoration frame (30). Pedestal leg sections (60a1-2L, 60a1-2R to 60c1-2L, and60c1-2L) of the pedestal sections (60a1 to 60c1) come into contact with predetermined parts of the attaching sections (33a to 33c) of the decoration frame (30). Pressing plate sections (60a1-4L, 60a1-4R to 60c1-4L, and 60c14R) extending from the vicinities of both ends of pedestal surfaces of the pedestal sections (60a1 to 60c1) press a turning barrel (20) of a body (10) from an upper end circumference. Arm sections (60a2-2 to 60c2-2) of the spring sections (60a2 to 60c2) sandwich a ceiling plate in conjunction with and a flange of the decoration frame (30).

Description

BACKGROUND

In recent years, a lighting system including a semiconductor light-emitting element such as an LED (Light Emitting Diode) as a light source is used. For example, there is a lighting system in which a body including a light source is provided to be capable of turning around a turning center line serving as a center axis in turning the vertical direction and the horizontal direction of a lighting system main body. In such a lighting system, a substantially cylindrical inner frame, to which the body is attached, is attached to and capable of turning by sliding on a substantially cylindrical outer frame for fixing the lighting system itself to an indoor ceiling. A turning amount of the inner frame with respect to the outer frame is regulated to a predetermined amount. A plate of the indoor ceiling is sandwiched by a flange section included in the outer frame and an elastic member attached to the outer frame, whereby the lighting system is attached and fixed to the indoor ceiling.
However, the lighting system is unstably attached and fixed to the indoor ceiling. When the body including the light source is turned around the turning center line serving as the center axis in turning the vertical direction and the horizontal direction of the lighting system main body, the lighting system is sometimes suddenly detached and unfixed.
It is an object of the present embodiments to provide a lighting system that is easily and firmly attached and fixed to an indoor ceiling.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the configuration of the lighting system according to an embodiment;
FIG. 2 is a top view showing the configuration of the lighting system;
FIG. 3 is a perspective view showing the configuration of a fixing section of the lighting system;
FIG. 4 is an exploded perspective view showing the configuration of the lighting system;
FIG. 5 is an exploded perspective view showing the configuration of a body of the lighting system;
FIG. 6 is a perspective view showing the lighting system;
FIG. 7 is a diagram showing an attachment form for attaching the lighting system to an indoor ceiling; and
FIG. 8 is a diagram showing an attachment form for attaching the lighting system to the indoor ceiling.

DETAILED DESCRIPTION

A lighting system according to embodiments is explained below with reference to the drawings. Components having the same functions in the embodiment are denoted by the same reference numerals and signs and redundant explanation of the components is omitted. The lighting system explained in the embodiment below is only an example and does not limit the embodiment. For example, in the embodiment, the lighting system is a universal downlight set on a ceiling of a building and including an LED (Light Emitting Diode) as a light source. However, the lighting system is not limited to this and may be a lighting system including a semiconductor light source in general as a light source. The embodiment and modifications of the embodiment may be combined as appropriate without being contradictory to each other.
A lighting system (e.g., a lighting system 1) according to the first embodiment includes a body (e.g., a body 10), a turning frame (e.g., a decoration frame 30), holding sections (e.g., fixing sections 60a to 60c), and elastic sections (e.g., spring sections 60a2 to 60c2). A light-emitting element is mounted on the body (the body 10). A turning barrel (e.g., a turning barrel 20) is annularly attached to the body (the body 10). The turning frame (e.g., the decoration frame 30) includes a circumferential edge section (e.g., a flange 31) at one circumferential end having a substantially cylindrical shape fit in an attachment hole of a ceiling plate. The turning barrel (e.g., the turning barrel 20) is fit in the turning frame (e.g., the decoration frame 30) to be capable of turning in the turning barrel (e.g., the turning barrel 20). The holding sections (e.g., the fixing sections 60a to 60c) are attached to the turning frame (e.g., the decoration frame 30) in a state in which the turning barrel (e.g., the turning barrel 20) is fit in the turning frame (e.g., the decoration frame 30). The holding sections (e.g., the fixing sections 60a to 60c) hold the fitting of the turning barrel (e.g., the turning barrel 20) in the turning frame (e.g., the decoration frame 30). The elastic sections (e.g., the spring sections 60a2 to 60c2) are attached to the turning frame (e.g., the decoration frame 30). The elastic sections (e.g., the spring sections 60a2 to 60c2) sandwich the turning frame (e.g., the decoration frame 30), the holding sections (e.g., the fixing sections 60a to 60c), and the ceiling plate using an elastic force in conjunction with the circumferential edge section (e.g., the flange 31).
In a lighting system (e.g., the lighting system 1) according to the second embodiment, the holding sections (e.g., the fixing sections 60a to 60c) further include pedestal sections (e.g., pedestal sections 60a1-1 to 60c1-1), elected sections (e.g., erected surfaces 60a1-3 to 60c1-3), upper surfaces (e.g., upper surfaces 60a1-4 to 60c1-4), pressing sections (e.g., pressing plate sections 60a1-1L, 60a1-1R to 60c1-1L, and 60c1-1R), and leg sections (e.g., pedestal leg sections 60a1-2L, 60a1-2R-60c1-2L, and 60c1-2R). The elastic sections (e.g., the spring sections 60a2 to 60c2) are placed on the pedestal sections (e.g., the pedestal sections 60a1-1 to 60c1-1). The erected sections (e.g., the erected surfaces 60a1-3 to 60c1-3) are erected on the pedestal sections (e.g., the pedestal sections 60a1-1 to 60c1-1). The upper surfaces (e.g., the upper surfaces 60a1-4 to 60c1-4) extend from the erected sections (e.g., the erected surfaces 60a1-3 to 60c1-3) to the outer circumferential side of the turning frame (e.g., the decoration frame 30) and press the elastic sections (e.g., the spring sections 60a2 to 60c2) placed on the pedestal sections (e.g., the pedestal sections 60a1-1 to 60c1-1). The pressing sections (e.g., pressing plate sections 60a1-1L, 60a1-1R to 60c1-1L, and 60c1-1R) extend from the pedestal sections (e.g., the pedestal sections 60a1-1 to 60c1-1) to the inner circumferential side of the turning frame (e.g., the decoration frame 30) and, when attached to the turning frame (e.g., the decoration frame 30), press one circumferential end of the turning barrel (e.g., the turning barrel 20). The leg sections (e.g., pedestal leg sections 60a1-2L, 60a1-2R-60c1-2L, and 60c1-2R) respectively extend from both ends of the pedestal sections (e.g., the pedestal sections 60a1-1 to 60c1-1) on a substantially cylindrical circumference of the turning frame to the opposite side of a side where the erected sections (e.g., the erected surfaces 60a1-3 to 60c1-3) are erected. Surfaces oppose to each other of the leg sections (e.g., pedestal leg sections 60a1-2L, 60a1-2R-60c1-2L, and 60c1-2R) come into contact with predetermined parts of the turning frame (e.g., the decoration frame 30).
In a lighting system (e.g., the lighting system 1) according to the third embodiment, the elastic sections (e.g., the spring sections 60a2 to 60c2) further include arm sections (e.g., arm sections 60a2-2 to 60c2-2) and protecting sections (e.g., cap sections 60a3 to 60c3). The arm sections (e.g., the arm sections 60a2-2 to 60c2-2) extend to the outer circumferential side of the turning frame (e.g., the decoration frame 30). The protecting sections (e.g., the cap sections 60a3 to 60c3) are attached to distal ends of the arm sections (e.g., the arm sections 60a2-2 to 60c2-2) extending to the outer circumferential side of the turning frame (e.g., the decoration frame 30) and protect the distal ends.
In a lighting system (e.g., the lighting system 1) according to the fourth embodiment, the elastic sections (e.g., the spring sections 60a2 to 60c2) are attached to the turning frame (e.g., the decoration frame 30) at substantially equal intervals together with the holding sections (e.g., the fixing sections 60a to 60c).
In a lighting system (e.g., the lighting system 1) according to the fifth embodiment, the elastic sections (e.g., the spring sections 60a2 to 60c2) are torsion springs.
In a lighting system (e.g., the lighting system 1) according to the sixth embodiment, the elastic sections (e.g., the spring sections 60a2 to 60c2) are leaf springs.

Embodiment

Configuration of a lighting system

FIG. 1 is a perspective view showing the configuration of a lighting system according to the embodiment. FIG. 2 is a top view showing the configuration of the lighting system. FIG. 1 is a perspective view of a lighting system 1 according to the embodiment viewed from an upward oblique direction on the opposite side of a light irradiating direction. FIG. 2 is a top view of the lighting system 1 shown in FIG. 1 viewed from an upward direction on the opposite side of the light irradiating direction. Directions shown in FIGS. 1 and 2 are the same direction.
The lighting system 1 is, for example, a downlight embedded and set in a ceiling of a building. The lighting system 1 causes a semiconductor light-emitting element such as an LED mounted on the inside thereof to emit light to thereby irradiate light in a downward direction shown in FIG. 1. The lighting system 1 includes a body 10, a decoration frame 30, a turning regulating section 40, and fixing sections 60a to 60c.
The body 10 includes thermal radiation fins 11, a lens frame 15, and a turning barrel 20. The thermal radiation fins 11 are formed of metal excellent in thermal radiation properties such as aluminum die cast. The lens frame 15 is assembled below the thermal radiation fins 11 and houses, for example, a board in which an LED is arranged as a light source. The turning barrel 20 is formed of metal such as aluminum die cast in a substantially cylindrical shape. In the lighting system 1, the thermal radiation fins 11 side of the body 10 is referred to upper and the turning barrel 20 side is referred to as lower. The turning barrel 20 includes, in one part at a substantially cylindrical upper end, a projecting section 21 extending in an outer circumferential direction (see FIG. 2).
The decoration frame 30 is formed of, for example, metal such as aluminum die cast. The decoration frame 30 has a substantially cylindrical shape opened in substantially circular shapes respectively at upper and lower ends thereof. The decoration frame 30 adjusts, using the cylindrical shape thereof, an irradiating direction of light irradiated from the body 10. The decoration frame 30 includes a substantially annular flange 31 in a lower part thereof and includes a circumferential sidewall 32 erected from the inner circumference of the flange 31. The decoration frame 30 corresponds to a turning frame for sliding the fit-in turning barrel 20 to thereby turn the turning barrel 20 along the inner circumference of the decoration frame 30.
The turning regulating section 40 is attached to one place of the circumferential sidewall 32 of the decoration frame 30 by screwing screws 41. The turning regulating section 40 includes a contact section 40a extending from an attachment position to the decoration frame 30 toward the center direction of the decoration frame 30 in an upper part at the circumferential upper end of the turning barrel 20 fit in the decoration frame 30. When the body 10 turns along the inner circumference of the decoration frame 30, the projecting section 21 of the turning barrel 20 comes into contact with the contact section 40a and regulates the turning of the body 10.
The decoration frame 30 includes attaching sections 33a to 33c arranged on the circumferential sidewall 32 at substantially equal intervals. As shown in FIG. 1, the fixing sections 60a to 60c are respectively attached to the attaching sections 33a to 33c. Below-mentioned spring leg sections 60a2-3L and 60a2-3R are fit in predetermined fitting grooves of the attaching sections 33a to 33c, whereby the fixing sections 60a to 60c are respectively attached to the attaching sections 33a to 33c. As explained in detail below, the fixing sections 60a to 60c sandwich a ceiling plate, to which the lighting system 1 is attached, in conjunction with the flange 31 of the decoration frame 30 to thereby fix the lighting system 1 to the ceiling plate.
In FIG. 1, the arm sections 60a2-2 to 60c2-2 of the attaching sections 33a to 33c are respectively shown in different forms. The attaching sections 33a to 33c have the same configuration except attachment positions. A form of the arm sections 60a2-2 to 60c2-2 shown below in FIG. 6 is an initial form in a state in which an external force is not applied thereto.
The arm section 60a2-2 shown in FIG. 1 is present in a position to which the arm section 60a2-2 is moved slightly upward from the form shown in FIG. 6 by an external force resisting an elastic force applied to the arm section 60a2-2. Compared with the arm section 60a2-2 shown in FIG. 1, the arm section 60b2-2 shown in FIG. 1 is present in a position to which the arm section 60b2-2 is moved further upward by an external force resisting an elastic force applied to the arm section 60b2-2. Compared with the arm section 60b2-2 shown in FIG. 1, the arm section 60c2-2 shown in FIG. 1 is present in a position to which the arm section 60c2-2 is moved upward to the maximum by an external force resisting an elastic force applied to the arm section 60c2-2.
As shown in FIGS. 1 and 2, the fixing sections 60a to 60c are attached to the decoration frame 30 in a state in which the body 10, in which the turning barrel 20 is fit, is fit in the decoration frame 30. The fixing sections 60a to 60c press the upper end of the turning barrel 20 from above using pressing plate sections 60a1-1L, 60a1-1R to 60c1-1L, and 60c1-1R. The pressing plate sections 60a1-1L, 60a1-1R to 60c1-1L, and 60c1-1R are extending sections extending from below-mentioned pedestal sections 60a1 -1 to 60c1-1 of the fixing sections 60a to 60c attached to the outer circumference of the decoration frame 30 toward the center direction of the decoration frame 30. The pressing plate sections 60a1-1L, 60a1-1R to 60c1-1L, and 60c1-1R press the upper end circumference of the turning barrel 20 of the body 10 fit in the decoration frame 30. Even when the turning barrel 20 turns with respect to the decoration frame 30, the fixing sections 60a to 60c do not come into contact with the projecting section 21 and regulate the turning.
The turning barrel 20 is attached to the decoration frame 30 to be capable turning by the pressing by the pressing plate sections 60a1-1L, 60a1-1R to 60c1-1L, and 60c1-1R and is suppressed from coming off the decoration frame 30.
The turning barrel 20 and the decoration frame 30 are formed of the same material or different materials adopted taking into account frictional resistance and turning torque in turning the turning barrel 20 with respect to the decoration frame 30. For example, both of the turning barrel 20 and the decoration frame 30 may be formed of metal. Alternatively, for example, both of the turning barrel 20 and the decoration frame 30 may be formed of resin such as ABS (Acrylonitrile Butadiene Styrene). Alternatively, for example, one of the turning barrel 20 and the decoration frame 30 may be formed of metal and the other may be formed of resin. Alternatively, for example, the turning barrel 20 and the decoration frame 30 may be formed of materials having different coefficients of friction.

Configuration of the fixing section and an attachment form to the decoration frame

Configuration of a fixing section and attachment form to a decoration frame

FIG. 3 is a perspective view showing the configuration of the fixing section of the lighting system according to the embodiment. FIG. 4 is an exploded perspective view showing the configuration of the lighting system. In FIG. 3, the fixing sections 60a to 60c have the same configuration. Therefore, the fixing section 60a is representatively explained. In FIG. 4, for simplification of explanation, the body 10 is not shown. Only a form for attaching the fixing sections 60a to 60c to the decoration frame 30 is shown. However, actually, after the body 10 is fit in the decoration frame 30, the fixing sections 60a to 60c are attached to the decoration frame 30 to press the turning barrel 20 of the body 10 not to come off the decoration frame 30.
As shown in FIGS. 3 and 4, the fixing section 60a includes a pedestal section 60a1, a spring section 60a2, and a cap section 60a3.
The pedestal section 60a1 includes pressing plate sections 60a1-1L and 60a1-1R extending from the vicinities of both ends of a pedestal surface 60a1-1. The pedestal section 60a1 includes pedestal leg sections 60a1-2L and 60a1-2R extending downward respectively from the pressing plate sections 60a1-1L and 60a1-1R. The pedestal section 60a1 includes an erected surface 60a1-3 erected from one end side of the pedestal surface 60a1-1 and an upper surface 60a1-4 extending from the erected surface 60a1-4 and forming a surface substantially parallel to the pedestal surface 60a1-1. The pedestal section 60a1 includes, on the pedestal surface 60a1-1, an insert-through hole 60a1-5 through which a screw 60a4 is inserted.
As explained above, the pressing plate sections 60a1-1L and 60a1-1R are sections that press the turning barrel 20 of the body 10 from the upper end circumference when the fixing section 60a is attached to the attaching section 33a of the decoration frame 30. The pedestal leg sections 60a1-2L and 60a1-2R are sections that come into contact with predetermined parts of the attaching section 33a and hold an attachment position of the pedestal section 60a1 to the attaching section 33a when the fixing section 60a is attached to the attaching section 33a of the decoration frame 30.
The upper surface 60a1-4 includes upper pressing plate sections 60a1-4L and 60a1-4R extending from the vicinities of both ends of the upper surface 60a1-4 in a direction opposite to a direction in which the pressing plate sections 60a1-1L and 60a1-1R extend. The upper surface 60a1-4 and upper pressing plate sections 60a1-4L and 60a1-4R are formed in a substantially U shape viewed from above. The substantially U-shaped sections are sections with which the arm section 60a2-2 comes into contact when an arm section 60a2-2 of a below-mentioned spring section 60a2 is elastically deformed by an external force and pushed upward to the maximum.
When viewed from a side, the pedestal section 60a1 is formed in a substantially U shape by the pedestal surface 60a1-1, the erected surface 60a1-3, and the upper surface 60a1-4. As explained below, the substantially U-shaped section is a section in which coil springs 60a2-1L and 60a2-1R of the spring section 60a2 are housed. The coil springs 60a2-1L and 60a2-1R are pressed from above by the upper pressing plate sections 60a1-4L and 60a1-4R.
The spring section 60a2 is formed of metal having elasticity. The spring section 60a2 includes the coil springs 60a2-1L and 60a2-1R, the substantially U-shaped arm section 60a2-2, and spring leg sections 60a2-3L and 60a2-3R. The spring leg section 60a2-3L extends from a first winding terminal end of a coil of the coil spring 60a2-1L downward substantially in parallel to the pedestal leg section 60a1-2L.
Similarly, the spring leg section 60a2-3R extends from a first winding terminal end of a coil of the coil spring 60a2-1R downward substantially in parallel to the pedestal leg section 60a1-2R. The spring leg sections 60a2-3L and 60a2-3R respectively pass near extending bases of the pressing plate sections 60a1-1L and 60a1-1R of the pedestal section 60a1 and extend from above to below the pedestal section 60a1.
A substantially U-shaped first end portion of the arm section 60a2-2 is connected to a second winding terminal end of the coil of the coil spring 60a2-1L. A substantially U-shaped second end portion of the arm section 60a2-2 is connected to a second winding terminal end of the coil of the coil spring 60a2-1R.
The spring section 60a2 is, for example, a torsion spring. The coil springs 60a2-1L and 60a2-1R of the sprig section 60a2 give an elastic force to the arm section 60a2-2. The coil springs 60a2-1L and 60a2-1R locate the arm section 60a2-2 in a position shown in FIG. 6 as an initial state of the arm section 60a2-2 with respect to the decoration frame 30 in a state in which the spring leg sections 60a2-3L and 60a2-3R are fit in predetermined fitting grooves of the attaching section 33a of the decoration frame 30.
When the arm section 60a2-2 is pulled upward from the state shown in FIG. 6, the arm section 60a2-2 is pulled up resisting the elastic force by the coil springs 60a2-1L and 60a2-1R. To hold a state in which the arm section 60a2-2 is pulled upward, it is necessary to hold the arm section 60a2-2 with a resisting force resisting the elastic force by the coil springs 60a2-1L and 60a2-1R.
The cap section 60a3 is fit on a substantially U-shaped distal end portion of the arm section 60a2-2 to protect the substantially U-shaped bending distal end portion. The cap section 60a3 is formed of resin such as ABS resin.
As shown in FIG. 4, the spring section 60a2 attached with the cap section 60a3 is assembled to the pedestal section 60a1. The spring leg sections 60a2-3L and 60a2-3R of the assembled spring section 60a2 are fit in predetermined fitting grooves of the attaching section 33a of the decoration frame 30. The pedestal leg sections 60a1-2L and 60a1-2R of the pedestal section 60a1 come into contact with predetermined parts of the attaching section 33a of the decoration frame 30.
The pedestal section 60a1 reinforces the attachment of the fixing section 60a in the decoration frame 30 using the pedestal leg sections 60a1-2L and 60a1-2R in a state in which the spring leg sections 60a2-3L and 60a2-3R are fit in the predetermined grooves of the attaching section 33a of the decoration frame 30. Further, the pedestal section 60a1 holds an attachment position of the fixing section 60a in the decoration frame 30 using the pedestal leg sections 60a1-2L and 60a1-2R. The screw 60a4 is inserted through the insert-through hole 60a1-5 and screwed in a predetermined screw hole of the attaching section 33a, whereby the pedestal section 60a1 is firmly attached to the decoration frame 30.
A method of firmly fixing the pedestal section 60a1 to the decoration frame 30 is not limited to screwing by the screw. The pedestal section 60a1 may be firmly fixed to the decoration frame 30 by a push pin or the like. Like the pedestal section 60a1, the pedestal sections 60b1 and 60c1 are firmly fixed to the decoration frame 30.
The fixing section 60a is easily attached to the decoration frame 30 by the configuration explained above. Even when the turning barrel 20 slides on the decoration frame 30 to thereby turn with respect to the decoration frame 30, at least one of surfaces opposed to each other of the pedestal leg sections 60a1-2L and 60a1-2R comes into contact with the predetermined part of the attaching section 33a. Therefore, the fixing section 60a can hold the fixed position of the decoration frame 30.

Configuration of the body

FIG. 5 is an exploded perspective view showing the configuration of the body of the lighting system according to this embodiment.
The body 10 includes thermal radiation fins 11, a board 12, a lens base 13, a color rendering filter 14, a lens frame 15, and the turning barrel 20. As shown in FIG. 5, the body 10 is configured by assembling the turning barrel 20, the lens frame 15, the color rendering filter 14, the lens base 13, the board 12, and the thermal radiation fins 11 in this order from below. The thermal radiation fins 11 radiates heat emitted by a light source mounted face down on the board 12 located under the thermal radiation fins 11. The thermal radiation fins 11 include holes at both ends of the diameter of a substantially circular circumference of a flat placing surface. An electric cable (not shown in the figure) for supplying electric power to the light source mounted on the board 12 is laid upward in the thermal radiation fins 11.
On the lower surface of the board 12, LEDs (not shown in the figure) are arranged as light sources. The board 12 includes a control circuit (not shown in the figure) configured to supply electric power to a plurality of LEDs via the electric cable and control light emission of the LEDs. The board 12 includes cutout sections at both ends of the diameter of a substantially circular circumference.
The lens base 13 includes lenses 13a. In FIG. 5, one lens is denoted by reference sign 13a. However, members having truncated cone shapes formed on the lens base 13 correspond to the lenses 13a. The lens base 13 diffuses or focuses lights emitted from the LEDs arranged on the board 12. The board 12 is housed in the lens base 13 from above. The color rendering filter 14 is attached to the lens base 13 from below. Groove sections for attaching the color rendering filter 14 are provided on the inner circumference of the lens base 13. The groove sections include concave sections on the inner circumference of the lens base 13 and guide grooves for guiding below-mentioned projecting sections of the color rendering filter 14 from the lower end of the lens base 13 to the concave sections.
The lens base 13 includes bending sections at both ends of the diameter of a substantially cylindrical main body. The bending sections are concave sections on the outer circumference of the lens base 13 and are convex sections on the inner circumference of the lens base 13. When the board is housed in the lens base 13 from above, the cutout sections of the board 12 are aligned with the convex sections of the lens base 13.
When the color rendering filter 14 transmits lights emitted by the LEDs arranged on the board 12, the color rendering filter 14 adds a color to the lights. The color rendering filter 14 includes, at both ends of the diameter of a substantially circular circumference, projecting sections for attaching the color rendering filter 14 to the lens base 13. The projecting sections are inserted from the guide grooves. After the projecting sections reaches the concave sections, the color rendering filter 14 is rotated a predetermined angle to be attached to the lens base 13. Various members replacing the color rendering filter 14 may be attached in the same manner as the color rendering filter 14.
The lens frame 15 houses the lens base 13 in which the board 12 is housed and to which the color rendering filter 14 is attached. The lens frame 15 includes, at both ends of the diameter of a substantially circular circumference, convex sections projecting to the inner circumference. The convex sections of the lens frame 15 include screw holes. The thermal radiation fins 11 are attached to the lens frame 15 from above in a state in which the lens base 13 in which the board 12 is housed and to which the color rendering filter 14 is attached is housed in the lens frame 15.
When the lens base 13 is housed in the lens frame 15 from above, the concave sections of the lens base 13 are aligned with the convex sections of the lens frame 15. The attachment of the thermal radiation fins 11 to the lens frame 15 is performed by, after aligning the holes of the thermal radiation fins 11 and the screw holes of the lens frame 15, screwing screws inserted through the holes of the thermal radiation fins 11 into the screw holes of the lens frame 15. The attachment of the thermal radiation fins 11 to the lens frame 15 is not limited to the screwing and may be pinning.
The lens frame 15 includes turning shaft ports 15a and 15b. The lens frame 15 includes a turning shaft hole that pierces through the turning shaft ports 15a and 15b along line I-I shown in FIG. 5.
The lens frame 15 is housed in the turning barrel 20 from above. The tuning barrel 20 includes turning shaft ports 23a and 23b. After the lens frame 15 is housed in the turning barrel 20 and line I-I of the lens frame 15 and line II-II of the turning barrel 20 are aligned, a screw or a pin is inserted through the turning shaft ports 23a and 23b to fix the turning barrel 20. In this way, the body 10 including the lens frame 15 is fixed to the turning barrel 20. Alternatively, the turning barrel 20 is annularly attached to the body 10. The body 10 is capable of turning with respect to the turning barrel 20 around a turning center line serving as a center axis in turning line II-II (or line I-I).
The turning center line, which is the center axis in turning the turning barrel 20 on the inner circumference of the decoration frame 30, and line II-II (or line I-I), which is the turning center line serving as the center axis in turning the body 10 with respect to the turning barrel 20 are in a torsional positional relation in a space.
The turning barrel 20 includes the projecting section 21 on the circumference at the upper end. As explained above, the projecting section 21 of the turning barrel 20 comes into contact with the contact section 40a of the turning regulating section 40 attached to the decoration frame 30 to thereby regulate the turning barrel 20 from turning with respect to the decoration frame 30 exceeding a predetermined turning angle.

Appearance of the lighting system attached with the fixing sections

FIG. 6 is a perspective view showing the lighting system according to the embodiment. FIG. 6 shows an initial state of a fixed state in which, in the lighting system 1, the body 10 is attached to the decoration frame 30 and the body 10 is fixed to the decoration frame 30 by the fixing sections 60a to 60c. In the lighting system 1 in the state shown in FIG. 6, the cap sections 60a3 to 60c3 are respectively fit to bending distal end portions of the arm sections 60a2-2 to 60c2-2 of the fixing sections 60a to 60c. In the following explanation, a state of the lighting system 1 in which the arm sections 60a2-2 to 60c2-2 are in the state shown in FIG. 6 is referred to as initial state.
In the state shown in FIG. 6, the distal end portions, to which the cap sections 60a3 to 60c3 are attached, of the arm sections 60a2-2 to 60c2-2 of the fixing sections 60a to 60c are bent to below the flange 31 of the decoration frame 30. Therefore, the decoration frame 30 is prevented from directly coming into contact with an arrangement surface by the distal end portions of the cap sections 60a3 to 60c3 functioning as legs.
The lower surface of the decoration frame 30 is a section exposed to the outside when the lighting system 1 is attached to the ceiling. On the other hand, the fixing sections 60a to 60c including the cap sections 60a3 to 60c3 are sections hidden in the ceiling without being exposed to the outside when the lighting system 1 is attached to the ceiling.
Therefore, since the decoration frame 30 does not directly come into contact with the arrangement surface as shown in FIG. 6, for example, before work for attaching the lighting system 1 to the ceiling surface is started, it is possible to prevent the decoration frame 30 from being scratched or damaged by contact of a surface on which the lighting system 1 is provisionally placed.

Attachment form for attaching the lighting system to an indoor ceiling

FIGS. 7 and 8 are diagrams showing an attachment form for attaching the lighting system according to the embodiment to an indoor ceiling. FIG. 8 is a diagram of the attachment form of the lighting system 1 viewed from a B direction shown in FIG. 7.
When the lighting system 1 is embedded and set in a ceiling plate 100 of a building, the arm sections 60a2-2 to 60c2-2 of the fixing sections 60a to 60c are lifted to a position where the arm sections 60a2-2 to 60c2-2 are substantially parallel to the circumferential sidewall 32 of the decoration frame 30. The lighting system 1 is inserted in an embedding hole of the ceiling plate 100 in a state in which the fixing sections 60a to 60c are lifted to a position where the fixing sections 60a to 60c are substantially parallel to the circumferential sidewall 32 of the decoration frame 30. The lighting system 1 is pushed up until the flange 31 comes into contact with the ceiling.
Since the arm sections 60a2-2 to 60c2-2 are not pressed by an external force, the arm sections 60a2-2 to 60c2-2 change to a state shown in FIGS. 7 and 8. The ceiling plate 100 is sandwiched between the arm sections 60a2-2 to 60c2-2 and the flange 31. Consequently, the lighting system 1 is embedded and set in the ceiling plate 100.

Modifications

In the embodiment explained above, the spring sections 60a2 to 60c2 of the fixing sections 60a to 60c equally arranged on the circumferential sidewall 32 of the decoration frame 30 of the lighting system 1 are the torsion springs. However, the spring sections 60a2 to 60c2 are not limited to this and may be leaf springs. In the embodiment, the fixing sections are the three fixing sections 60a to 60c. However, the fixing sections are not limited to this and may be provided at substantially equal intervals in two place or four or more places of the decoration frame 30.
In the embodiment, the pressing plate sections provided in, for example, the fixing section 60a are the two pressing plate sections 60a1-1L and 60a1-1R. However, the pressing plate sections are not limited to this. The pressing plate sections extending from the pedestal surface 60a1-1 may be one or three or more pressing plate sections.

Effects by the embodiment and the modifications

According to the embodiment and the modifications, in the lighting system 1, the fixing sections 60a to 60c are arranged at substantially equal intervals on the circumferential sidewall 32 of the decoration frame 30. The fixing sections 60a to 60c include, in the pedestal sections 60a1 to 60c1 configured to support the spring sections 60a2 to 60c2, the pressing plate sections 60a1-1L, 60a1-1R to 60c1-1L, and 60c1-1R configured to press the turning barrel 20 of the body 10 not come off the decoration frame 30. Consequently, in the lighting system 1, it is possible to press, with an equal force, the turning barrel 20 fit in the decoration frame 30 and stabilize turning of the body 10 along the inner circumference of the decoration frame 30. Further, in the lighting system 1, it is possible to press the turning barrel 20 of the body 10 not to come off the decoration frame 30 without increasing the number of components.
According to the embodiment and the modifications, in the lighting system 1, in the spring sections 60a2 to 60c2 of the fixing sections 60a to 60c, for example, in the fixing section 60a, the screw 60a4 is arranged between the two coil springs 60a2-1L and 60a2-1R. The fixing section 60a is fixed to the decoration frame 30 by the screw 60a4. Consequently, in the lighting system 1, it is possible to attach each of the fixing sections 60a to 60c to the decoration frame 30 in a small space using one screw. Such a configuration can be applied to each of the fixing sections 60a to 60c equally arranged on the circumferential sidewall 32 of the decoration frame 30 of the lighting system 1. Therefore, even in the lighting system 1 having a large size, it is possible to attach the fixing sections 60a to 60c to the decoration frame 30 in a small space using one screw.
According to the embodiment and the modifications, in the initial state of the lighting system 1, for example, during attachment work for the lighting system 1, the distal ends of the arm sections 60a2-2 to 60c2-2 of the fixing sections 60a to 60c do not come into contact with the decoration frame 30. Therefore, in the lighting system 1, in the initial state, the decoration frame 30 is not scratched by the cap sections 60a3 to 60c3 provided for protection of the fingers of an operator in the attachment work. It is possible to protect the lighting system 1.
While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the inventions.

Claims

A lighting system comprising:
a body on which a light-emitting element is mounted and to which a turning barrel is annularly attached;

a turning frame including a circumferential edge section at one circumferential end having a substantially cylindrical shape fit in an attachment hole of a ceiling plate, the turning barrel being fit in the turning frame to be capable of turning in the turning barrel;

holding sections attached to the turning frame in a state in which the turning barrel is fit in the turning frame, the holding sections holding the fitting of the turning barrel in the turning frame; and

elastic sections attached to the turning frame, the elastic sections sandwiching the turning frame, the holding sections, and the ceiling plate using an elastic force in conjunction with the circumferential edge section.
The lighting system according to claim 1, wherein the holding sections further include:
pedestal sections on which the elastic sections are placed;

erected sections erected on the pedestal sections;

upper surfaces extending from the erected sections to an outer circumferential side of the turning frame and configured to press the elastic sections placed on the pedestal sections;

pressing sections extending from the pedestal sections to an inner circumferential side of the turning frame and configured to, when attached to the turning frame, press one circumferential end of the turning barrel; and

leg sections respectively extending from both ends of the pedestal sections on a substantially cylindrical circumference of the turning frame to an opposite side of a side where the erected sections are erected, surfaces oppose to each other of the leg sections coming into contact with predetermined parts of the turning frame.
The lighting system according to claim 1 or 2, wherein the elastic sections further include:
arm sections extending to an outer circumferential side of the turning frame; and

protecting sections attached to distal ends of the arm sections extending to the outer circumferential side of the turning frames.
The lighting system according to any one of claims 1 to 3, wherein the elastic sections are attached to the turning frame at substantially equal intervals together with the holding sections.
The lighting system according to any one of claims 1 to 4, wherein the elastic sections are torsion springs.
The lighting system according to any one of claims 1 to 4, wherein the elastic sections are leaf springs.