JP2014220178A - Cord length adjustment mechanism and lighting device including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cord length adjustment mechanism which is applied to an LED lighting device, and to provide a lighting device.SOLUTION: A cord length adjustment mechanism 10 adjusts a length of a cord 60 of a lighting device 100, which is installed suspended from a ceiling surface C, and includes a plug 20 attached to a duct rail 70. The cord length adjustment mechanism 10 includes: a storage part 30 provided below the plug 20 and in which a power source device 65 is stored; a cord length adjustment part 40 provided below the storage part 30 and around which the cord 60 is wound; and a case 12 which covers the plug 20, the storage part 30, and the cord length adjustment part 40.

Description

  The present invention relates to a cord length adjusting mechanism and a lighting fixture including the same. More specifically, the present invention relates to a mechanism that adjusts the length of a cord of a lighting fixture that is suspended and installed.

  2. Description of the Related Art Conventionally, pendant type lighting fixtures are known in which a lighting fixture body is suspended and installed via a cord from an installation portion for the lighting fixture such as a duct rail or a hook ceiling. In the pendant type lighting fixture, it is necessary to adjust the length of the cord in order to adjust the relationship between the height of the installation target portion and the height of the lighting fixture body, or to adjust the light distribution.

  Therefore, a cord length adjusting mechanism that adjusts the length of the cord of the pendant type lighting fixture is known. For example, Patent Document 1 discloses a cord length adjustment mechanism that engages and suspends a plug portion attached to the tip of a cord on a duct rail or a hook ceiling provided on a ceiling or the like.

  On the other hand, in recent years, lighting fixtures using semiconductor light emitting elements as light sources have been developed. As a semiconductor light emitting element, for example, there is an LED (Light Emitting Diode). In the lighting fixture using LED, LED is light-emitted by the power supply of DC voltage. For this reason, the power supply device for obtaining the electric power of DC voltage from the commercial power supply of 100V alternating current is required.

  By the way, since the LED generates heat when it is turned on, it is necessary to efficiently dissipate the LED. On the other hand, since the power supply also generates heat when it is turned on, it is preferable to install the LED and the power supply as far apart as possible.

JP 2006-294345 A

  However, in order to install the LED and the power supply device apart from each other in the luminaire main body, the luminaire main body becomes large, and the degree of freedom in designing the luminaire main body is limited. For this reason, it is conceivable to install the power supply device not on the luminaire main body side but on the plug side for attaching to the installation portion such as a duct rail.

  Therefore, a cord length adjusting mechanism having a plug for attaching to a part to be installed such as a duct rail is required to be of a type that can accommodate a power supply device for LED lighting.

  An object of the present invention is to provide a cord length adjusting mechanism and a lighting fixture that house a power supply device for LED lighting.

  The cord length adjustment mechanism disclosed in the present application is a cord length adjustment mechanism that includes a plug that can be connected to a connection terminal provided in a portion to be installed, by adjusting the length of a cord of a lighting fixture that is suspended and installed. A storage unit in which the power supply device is stored and a winding unit in which the cord is wound are provided. The plug and the storage unit are adjacent to each other, and the storage unit and the winding unit are adjacent to each other.

  The cord length adjusting mechanism preferably includes a case that covers the plug, the storage portion, and the winding portion.

  It is preferable that a flat portion is formed in the storage portion, and the power supply device is disposed to face the flat portion.

  A tension stop mechanism is preferably provided between the cord storage portion and the winding portion.

  A luminaire disclosed in the present application is a luminaire including a luminaire body including a light source, a cord having one end connected to the luminaire body, and a cord length adjusting mechanism to which the other end of the cord is connected. The cord length adjusting mechanism has the above configuration.

  According to the cord length adjusting mechanism and the luminaire disclosed in the present application, the luminaire main body can be reduced in size.

The front view which shows the structure of a lighting fixture. The front view which shows a cord length adjustment mechanism. The perspective view which shows a cord length adjustment mechanism. Sectional drawing which shows a case. The front view, side view, and back view which show a main body. The partial cross section front view which shows the inside of a storage part. The perspective view which shows the structure of a storage part.

The structure of the lighting fixture 100 is demonstrated using FIG.
In FIG. 1, the luminaire 100 is schematically shown in a front view. Further, the lighting apparatus 100 according to the present embodiment uses an LED as the light source 52.

  The lighting fixture 100 is an example of an embodiment according to the present invention. The luminaire 100 is a pendant luminaire in which the luminaire main body 50 is suspended and installed via a cord 60 from an installation portion for the luminaire such as a duct rail or a hook ceiling. In this embodiment, the lighting fixture 100 is attached to the duct rail 70 as an installation part.

  In the present embodiment, in the lighting fixture 100 suspended from the ceiling, the ceiling surface side in the longitudinal direction of the cord 60 is defined as “upper side”, and the opposite side (for example, vertically downward) is defined with respect to the ceiling surface side. It is defined as “lower”.

  The duct rail 70 is suspended by a connecting member 71 with respect to the ceiling surface C, for example. The luminaire 100 is mechanically and electrically connected to the duct rail 70. The luminaire 100 is configured to be movable along the duct rail 70. For example, a plurality of lighting fixtures 100 are suspended from the duct rail 70.

  In addition, the lighting fixture 100 is not limited to the form connected to a duct rail. For example, it may be a luminaire of the type connected to a hook ceiling. The light source is not limited to LEDs, and other semiconductor light emitting elements such as EL (Electroluminescence) may be used.

  The luminaire 100 includes a cord length adjusting mechanism 10, a luminaire main body 50, and a cord 60.

  The cord length adjusting mechanism 10 is a part that attaches the luminaire 100 to the duct rail 70 and electrically connects the luminaire 100 to the duct rail 70. Further, the cord length adjusting mechanism 10 can adjust the length of the cord 60 and adjust the distance from the duct rail 70 of the luminaire main body 50 (the hanging height of the luminaire main body 50 from the duct rail 70). Is. Details of the cord length adjusting mechanism 10 will be described later.

  The cord 60 is for electrically and mechanically connecting the cord length adjusting mechanism 10 and the luminaire main body 50. The cord 60 suspends the luminaire main body 50 from the cord length adjusting mechanism 10 attached to the duct rail 70. The cord 60 of the present embodiment is flexible.

  The luminaire main body 50 includes a housing 51, a light source 52, and a shade 53. The casing 51 is a member that serves as a base of the lighting fixture body 50. The casing 51 has an elongated bottomed cylindrical shape. A top surface is formed on the upper surface side in FIG. 1, and an irradiation port 55 for irradiating light is formed on the lower surface side.

  The casing 51 is formed using a material having high thermal conductivity, for example, a metal material such as aluminum, in order to dissipate heat generated from the light source 52. A light source attachment portion 56 for attaching the light source 52 is formed along the inner wall of the housing 51 inside the housing 51.

  A holding part 57 that holds the shade 53 is provided on the lower surface side of the housing 51. A locking portion 58 for fixing the cord 60 and suspending the luminaire main body 50 is provided on the upper surface side of the housing 51. The shape of the luminaire main body 50 is not limited, and may be, for example, a rectangular tube shape or a conical shape in addition to the cylindrical shape.

  The seed 53 is a member attached so as to cover the lower surface side of the housing 51. The seed 53 distributes light to the outside while reflecting and diffusing light from the light source 52. The seed 53 is formed of a translucent resin material, glass material, ceramics, or the like. The shade 53 has a structure that can be attached to and detached from the housing 51.

  The light source 52 has an LED module substrate as a light source substrate. The LED module substrate has a plurality of LEDs as semiconductor light emitting elements mounted on the substrate. A cord 60 is electrically connected to the light source 52.

The configuration of the cord length adjusting mechanism 10 will be described with reference to FIGS.
FIG. 4 is a cross-sectional view of the case 12 taken along AA in FIG.

  The cord length adjusting mechanism 10 adjusts the length of the cord 60 of the lighting fixture 100. The cord length adjusting mechanism 10 of this embodiment is attached to a duct rail 70 as an installation portion. The cord length adjusting mechanism 10 includes a main body 11 and a case 12.

  The main body 11 accommodates the power supply device 65 by adjusting the length of the cord 60. The main body 11 of this embodiment is substantially cylindrical and has a substantially circular cross section. The shape of the main body 11 is not limited to a substantially cylindrical shape. For example, a substantially rectangular tube shape or the like may be used. A cord 60 is drawn from the lower end of the main body 11. Detailed description of the main body 11 will be described later.

  The case 12 covers the main body 11. The case 12 has a substantially cylindrical shape corresponding to the shape of the main body 11. The case 12 is configured such that the entire upper surface is opened and the main body 11 is inserted from the upper surface side. In the case 12, an opening 12 </ b> A is formed on the bottom surface so as to penetrate the cord 60. FIG. 2 shows a state in which the main body 11 and the case 12 are separated and the cord 60 is passed through the case 12 in the cord length adjusting mechanism 10.

The configuration of the main body 11 will be described with reference to FIG.
5A schematically shows the main body 11 in a front view, FIG. 5B schematically shows the main body 11 in a side view, and FIG. 5C shows the main body 11 in a rear view. Is schematically represented.
The main body 11 includes a plug 20, a storage unit 30, and a cord length adjustment unit 40 as a winding unit.

  The plug 20 is attached to a duct rail 70 as an installation part. The plug 20 is configured in a substantially cylindrical shape. At the upper end of the plug 20, connecting fittings 21 and 21 are directed so as to protrude on both the left and right sides (in a direction orthogonal to the longitudinal direction of the main body 11).

  The connection fittings 21 and 21 are mechanically and electrically connected to a groove (not shown) of the duct rail 70. The inner surface of the groove portion of the duct rail 70 is provided with a conductive portion, and the connection fittings 21 and 21 are electrically connected to the conductive portion by fitting the connection fittings 21 and 21 into the groove portion.

  The plug 20 includes a substantially semi-cylindrical plug main body 20B and a substantially semi-cylindrical cover 20A. The cover 20A is fixed to the plug main body 20B with screws. The plug main body 20B and the cover 20A are detachable.

  The storage unit 30 stores the power supply device 65. The storage unit 30 is configured in a substantially cylindrical shape. The plug 20 is connected to the first end 30 </ b> C of the storage unit 30. The second end 30D of the storage unit 30 is integrally provided with a cord length adjustment unit 40 as a winding unit. The storage unit 30 and the cord length adjustment unit 40 may be separate members.

  The storage unit 30 includes a substantially semi-cylindrical storage unit main body 30B and a substantially semi-cylindrical cover 30A. The storage unit main body 30B and the cover 30A are fixed with screws in a substantially cylindrical shape. The storage unit main body 30B and the cover 30A are detachable. The internal configuration of the storage unit 30 will be described in detail later.

  The outer diameter of the storage portion 30 is substantially the same as the inner diameter of the case 12 to the extent that the case 12 and the storage portion 30 do not rattle when the main body 11 is stored in the case 12.

  The power supply device 65 is a device for turning on the light source 52 provided in the lighting fixture body 50. The power supply device 65 is an electric circuit for obtaining DC voltage power from a 100 V AC commercial power supply, and has a configuration in which a plurality of electric components are mounted on a substrate. The power supply device 65 is electrically connected to the plug 20 and the cord 60.

  The cord length adjusting unit 40 as a winding unit adjusts the length of the cord 60. The cord length adjusting unit 40 is configured in a substantially cylindrical shape. A first opening 41 and a second opening 42 are formed on the circumferential surface of the cord length adjusting unit 40.

  The first opening 41 is formed near the end of the cord length adjusting unit 40 on the storage unit 30 side. The second opening 42 is a U-shaped notch and is formed so as to open to the free end side of the cord length adjusting unit 40.

  A cord fixture 13 is attached to the free end of the cord length adjusting unit 40. The cord fixing tool 13 fixes the position of the cord 60 with respect to the cord length adjusting unit 40. The cord fixture 13 includes a lid 43, a cord outlet 44, and a fastening tool 45 (see FIG. 2).

  The outer diameter of the cord length adjusting unit 40 is determined so that the cord length adjusting unit 40 in which the case 12 and the cord 60 are wound once is not displaced inside the case 12 when the main body 11 is stored in the case 12. Has been.

  The lid 43 is detachably attached by being screwed to the free end of the cord length adjusting unit 40. A cord outlet 44 is formed on the bottom surface of the lid 43 so as to extend with respect to the lid 43.

  The cord outlet 44 has a through hole having an inner diameter through which the cord 60 can be inserted and the cord 60 can be freely advanced and retracted. A plurality of movable pieces are formed at the free end of the cord outlet 44. A male screw for screwing the fastening tool 45 is formed on the peripheral surface of the cord outlet 44.

  The tightening tool 45 is screwed into the free end of the cord outlet 44 to fix the position of the cord 60 inserted through the cord outlet 44. The tightening tool 45 is configured to press the movable piece around the cord 60 and fix the position of the cord 60 by being screwed into a male screw formed on the peripheral surface of the cord outlet 44 and tightened.

The internal configuration of the storage unit 30 will be described with reference to FIG.
In FIG. 6, a cross section obtained by partially cutting the main body 11 is schematically shown in a side view.

  A power supply device 65 is housed inside the housing portion 30. The power supply device 65 is placed on the support base 80. The support base 80 includes a flat plate 81 on which the power supply device 65 is placed and a leg 82 that supports the flat plate 81.

  The flat plate 81 of the support base 80 is configured to be substantially the same rectangle as the power supply device 65 in a front view. A flat surface portion 31 is formed on the outer peripheral surface of the storage portion 30 corresponding to the position where the flat plate 81 is disposed. The planar portion 31 is formed outside and inside the storage portion 30.

  A heat conductive sheet 85 is provided on the front side of the support base 80, that is, between the support base 80 and the power supply device 65. The heat conductive sheet 85 is configured by a rectangle having substantially the same size as the support base 80 in a front view. Detailed description of the heat conductive sheet 85 is omitted in this embodiment. The thermal conductive sheet 85 can be omitted if no abnormal temperature rise of the light source is observed.

  In the present embodiment, the power supply device 65 is mounted on the support base 80. However, the present invention is not limited to this. For example, the power supply device 65 may be directly placed on the flat surface portion 31. In this way, the number of parts can be reduced.

  A tension stop mechanism 90 is provided at the bottom of the storage unit 30. The tension stopper mechanism 90 includes a bottom storage portion 32 formed at the bottom of the storage portion 30 and a tension stopper 66. A tension stopper 66 is stored in the bottom storage portion 32. The tension stopper 66 is fixed via the cord 60. The tension stopper 66 restricts the axial movement of the cord 60 and blocks the tension acting on the cord 60.

  The arrangement of the cord 60 in the cord length adjusting mechanism 10 will be described with reference to FIGS. 5 and 6.

  The cord 60 extends from the connection fittings 21 and 21 of the plug 20 inside the plug 20 and is connected to the power supply device 65 inside the storage unit 30. On the other hand, the cord 60 extended from the power supply device 65 is extended inside the cord length adjusting portion 40 via a tension stopper 66 disposed in the bottom storage portion 32.

  The cord 60 extended inside the cord length adjusting unit 40 passes through the first opening 41, is wound around the cord length adjusting unit 40, passes through the second opening 42, and is again cord length. It extends inside the adjustment unit 40. The cord 60 extended inside the cord length adjusting unit 40 again passes through the cord outlet 44 and extends outside.

  Note that the cord 60 wound around the cord length adjustment unit 40 is a surplus obtained by subtracting the hanging height of the luminaire main body 50 from the entire length of the cord 60. In the lighting fixture 100, the hanging height of the lighting fixture main body 50 from the duct rail 70 is adjusted by adjusting the length of the cord 60 wound around the cord length adjusting unit 40.

The configuration of the storage unit 30 will be described with reference to FIG.
In FIG. 7, the storage unit 30 is schematically represented by a perspective view.

  The bottom storage part 32 is formed by combining the storage part main body 30B and the cover 30A. A third partition wall 93 and a fourth partition wall 94 are formed in the storage unit main body 30B. A first partition 91 and a second partition 92 are formed on the cover 30A. Each of the first partition 91, the second partition 92, the third partition 93, and the fourth partition 94 is formed with a semicircular cutout.

  By combining the storage unit main body 30B and the cover 30A, the first partition wall 91 and the third partition wall 93, and the second partition wall 92 and the fourth partition wall 94 are combined to form the bottom storage unit 32. In FIG. 7, the accommodating part 30 has shown the state which isolate | separated the accommodating part main body 30B and the cover 30A.

  A flange 35 is formed on the upper surface of the storage unit 30. The flange 35 is formed by combining the housing main body and the cover 30A. A locking portion 25 is formed at the bottom of the plug 20. The locking portion 25 is formed by combining the plug main body 20B and the cover 20A. A flange 35 of the storage portion 30 is fitted into the locking portion 25 of the plug 20.

  In order to fit the flange 35 of the storage part 30 to the locking part 25 of the plug 20, the storage part main body and the cover 30 </ b> A are combined to form the flange 35, and the locking part 25 is fitted to the formed flange 35. Meanwhile, the plug main body 20B and the cover 20A are combined.

  In addition, the plug 20 and the storage chamber 30 are not limited to the form which can be separated. For example, the plug 20 and the storage chamber 30 may be integrally formed.

The effect of the cord length adjusting mechanism 10 will be described.
According to the cord length adjusting mechanism 10, it can also be applied to LED lighting fixtures.

  That is, the storage unit 30 is provided above the cord length adjustment unit 40, and the power supply device 65 is stored in the storage unit 30 so that the LED light emitting element of the light source 52 is caused to emit light by a DC voltage power source. The present invention can also be applied to LED lighting fixtures that require a power supply device 65 between the power source and the lighting fixture body 50.

  Further, according to the cord length adjusting mechanism 10 of the present embodiment, since the power supply device 65 is not provided in the luminaire main body 50, the luminaire main body 50 can be reduced in size.

  Furthermore, according to the cord length adjusting mechanism 10 of the present embodiment, since the power source device 65 is provided in the cord length adjusting mechanism 10, the light source 52 and the power source device 65 can be separated from each other. It is possible to make it difficult to transmit the heat generated by Further, it is possible to make it difficult to transfer the heat generated by the power supply device 65 to the light source 52.

  Therefore, the performance degradation of the light source 52 and the power supply device 65 due to the temperature rise can be suppressed. In particular, since the LED generates a larger amount of heat than a fluorescent lamp or the like, it is preferable that the configuration shown in this embodiment can reduce the thermal influence on the power supply device 65.

  Further, by providing the storage portion 30 with the bottom storage portion 32 and storing the tension stopper 66 in the bottom storage portion 32, the tension stop mechanism 90 can be configured.

  Furthermore, the flat part 31 is provided in the storage part 30, and the clearance gap (air layer with a low heat transfer coefficient) between the heat conductive sheet 85 that cools the power supply device 65 and the outside (the outside of the flat part 31) is minimized. Thereby, the cooling effect of the power supply device 65 by the heat conductive sheet 85 can be improved.

DESCRIPTION OF SYMBOLS 10 Cord length adjustment mechanism 11 Main body 12 Case 13 Fixing tool 20 Plug 30 Storage part 32 Bottom storage part 40 Cord length adjustment part (winding part)
50 Lighting fixture body 60 Code 100 Lighting fixture

Claims (5)

A cord length adjustment mechanism comprising a plug that can be connected to a connection terminal provided in a part to be installed, adjusting the length of a cord of a lighting fixture to be hung and installed,
A storage section for storing the power supply device;
A winding portion around which the cord is wound;
With
The plug and the storage part are adjacent to each other, and the storage part and the winding part are adjacent to each other.
Cord length adjustment mechanism. The cord length adjusting mechanism according to claim 1,
A case for covering the plug, the storage portion, and the winding portion;
Cord length adjustment mechanism. The cord length adjusting mechanism according to claim 1 or 2,
The storage part is formed with a flat part,
In the plane portion, the power supply device is disposed to face the plane portion.
Cord length adjustment mechanism. The cord length adjusting mechanism according to claim 1,
A tension stop mechanism is provided between the storage portion of the cord and the winding portion.
Cord length adjustment mechanism. A luminaire body provided with a light source;
A cord having one end connected to the luminaire body;
A cord length adjusting mechanism to which the other end of the cord is connected;
A lighting fixture comprising:
The cord length adjusting mechanism has a configuration described in claims 1 to 4.
lighting equipment.

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