JP2014032869A - Luminaire and illumination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire and an illumination system capable of more surely suppressing arc discharge occurring between a conductor on the lighting duct side and a power receiving unit on the luminaire side when a plug is attached or removed, thereby making it possible to prevent overheating and other trouble.SOLUTION: A plug 1 is provided with a plug blade 13a touching a conductor 22 when it is attached to a lighting duct 2, an operation unit 15 whose position changes when located at an attachment completed position and when not located at the attachment completed position, and a switch S whose contact state changes according to the position of the operation unit 15. A lighting fixture 3 is provided with a lighting circuit 32 for supplying lighting power to a diode module 301, a control unit 34 for controlling the operation of the lighting circuit 32, and a determination unit 33 for determining according to the contact state of the switch S whether the operation unit is located at the attachment completed position. The control unit 34 restrains the power supplied to the diode module 301 by the lighting circuit 32 when the operation unit is determined not to be located at the attachment completed position by the determination unit 33.

Description

  The present invention relates to a lighting fixture attached to a lighting duct, and a lighting system using the lighting fixture.

  Conventionally, there exists a lighting fixture attached to the lighting duct connected to AC power supply (for example, refer patent document 1).

  On the other hand, in recent years, lighting fixtures using light emitting diodes as a light source are increasing, and such lighting fixtures are used by being attached to lighting ducts in stores and the like. Since the light emitting diode emits light when a direct current is passed, some lighting fixtures using the light emitting diode include a power source unit that converts a commercial AC power source into a direct current. However, loss occurs when converting AC to DC.

  Therefore, a lighting fixture has been proposed that receives DC power from a lighting duct connected to a DC power source and lights a light source such as a light emitting diode without performing AC / DC conversion (see, for example, Patent Document 2). .

  However, when the lighting fixture is attached to or detached from the lighting duct, arc discharge may occur at the contact point between the lighting duct-side conductor and the lighting fixture-side power receiving unit. In particular, in direct current power supply, unlike in alternating current power supply, this arc discharge continues.

  Therefore, in order to suppress the occurrence of arc discharge when a lighting fixture is attached to or detached from a DC-powered lighting duct, it has also been proposed to provide a switch for electrically connecting and disconnecting the power supply from the lighting duct in each lighting fixture plug. (For example, refer to Patent Document 3). When a lighting fixture is attached to or detached from the lighting duct, the user turns off the switch of the plug to electrically cut off the power supply from the lighting duct, thereby suppressing the occurrence of arc discharge.

Japanese Patent Laid-Open No. 2001-93677 JP-A-5-47476 Utility Model Registration No. 3110925

  However, in Patent Document 3, it may occur that the lighting fixture is attached to and detached from the lighting duct in a state in which the plug is switched on due to the user's forgetting operation or the like. In this case, since the lighting fixture is attached to and detached from the lighting duct in a state where power can be supplied from the lighting duct to the lighting fixture, arc discharge occurs at the contact point between the lighting duct-side conductor and the lighting fixture-side power receiving unit. There is a problem that problems such as overheating occur.

  The present invention has been made in view of the above reasons, and its purpose is to more reliably suppress arc discharge generated between the conductor on the lighting duct side and the power receiving unit on the lighting fixture side when the plug is attached or detached. An object of the present invention is to provide a lighting apparatus and a lighting system that can prevent problems such as overheating.

  The lighting fixture of the present invention is configured to be detachable from a lighting duct having a light source and a conductor energized with DC power, and includes a power receiving unit that comes into contact with the conductor when the lighting duct is attached to the lighting duct. A plug supplied with DC power from the conductor via the power receiving unit, a lighting circuit for supplying lighting power to the light source with the DC power supplied via the plug as an input, and an operation of the lighting circuit A control unit for controlling the operation, an operation unit that is displaced depending on whether or not the power reception unit is in an attachment complete position in contact with the conductor in a predetermined state, and a switch that switches a contact state depending on the position of the operation unit And a determination unit that determines whether or not the power reception unit is in the attachment completion position according to a contact state of the switch, and the control unit is based on a determination result of the determination unit. There, if the power receiving portion is not in the fully applied position, as compared with the case where the power receiving portion is in said fully applied position, the lighting circuit is characterized by inhibiting the power supplied to the light source.

  In this invention, it is preferable that the control unit turns off the light source based on a determination result of the determination unit when the power reception unit is not in the attachment completion position.

  In this invention, it is preferable that the control unit dims the light source based on a determination result of the determination unit when the power reception unit is not in the attachment completion position.

  In this invention, the lighting duct forms an opening in the longitudinal direction on one surface of a long hollow case, holds the conductor along the longitudinal direction inside the case, and the surface on the one surface side of the case. Preferably, a plug is attached, and the power receiving unit is in contact with the conductor when the plug is inserted into the case through the opening and rotated in a predetermined direction.

  An illumination system of the present invention includes a lighting duct having a conductor through which DC power is passed, and one or more lighting fixtures of the present invention.

  As described above, in the present invention, since the power supplied to the light source is suppressed while the plug is attached to and detached from the lighting duct, it is generated between the conductor on the lighting duct side and the power receiving unit on the lighting fixture side. There is an effect that arc discharge can be more reliably suppressed and problems such as overheating can be prevented.

It is a circuit diagram which shows the outline of the electric circuit comprised by the plug of Embodiment 1, a lighting duct, and a lamp. It is a circuit diagram which shows the structure of a power converter part same as the above. (A)-(c) It is a sequence diagram which shows operation | movement of each part same as the above. It is sectional drawing which fractured | ruptured a part which shows the structure of a lamp | ramp same as the above. (A) (b) It is sectional drawing which shows the structure of a plug same as the above. It is a perspective view which shows the simplified structure of the main body which removed the operation part same as the above. (A) (b) It is a top view which shows the structure of the operation part same as the above. It is a top view which shows the structure of a base part same as the above. (A) (b) It is a fracture view which shows the attachment structure to the lighting duct of the plug same as the above. It is the schematic which shows the structure of an illumination system same as the above. (A)-(c) It is a sequence diagram which shows operation | movement of each part of Embodiment 2. FIG.

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

(Embodiment 1)
FIG. 10 schematically shows an illumination system using the plug 1, the lighting duct 2 (hereinafter simply referred to as “duct 2”), and the lamp 3. Here, the lighting fixture A (for example, spotlight etc.) is comprised by attaching the lamp 3 to the plug 1 via the arm 4.

  The duct 2 is attached to the ceiling surface, for example, and is connected to the DC power supply device PS disposed on the back of the ceiling. A direct-current voltage (for example, DC 24 V) output from the direct-current power supply device PS is input to the feed-in portion FD provided at the end of the duct 2 via the wiring W. A DC voltage input to the feed-in portion FD is applied to a conductor 22 described later of the duct 2. One or more lighting fixtures A (three in FIG. 10) are attached to the duct 2, and each of the lighting fixtures A is supplied with a DC voltage from the duct 2 and lights up.

  Note that the DC power supply device PS may be a device that converts alternating current into direct current, or may be a battery or the like.

  FIG. 4 shows a cross-sectional view of the lamp 3 attached to the arm 4. The lamp 3 includes a light source unit 3A and a circuit unit 3B. In the following description, the vertical direction is defined in FIG.

  In the light source unit 3 </ b> A, the light source module 300 is attached to the heat radiating plate 310. In the light source module 300, for example, a diode module 301 including one or more light emitting diodes that are light sources is mounted on an aluminum substrate 302, and a resin lens 303 is placed on the front surface of the aluminum substrate 302. It is attached. The heat radiating plate 310 is made of aluminum die cast to radiate the heat generated in the diode module 301, and the light source module 300 is mounted on one surface and the heat radiating fins 311 are formed on the other surface. The outer periphery of the radiating fin 311 is covered with a cover 312, and the arm 4 is rotatably attached to a screw hole provided in the cover 312. The diode module 301 may be a combination of red, blue, and green light emitting diodes, or the light emitting diodes may be covered with a wavelength conversion member such as a phosphor layer, A combination thereof may be used.

  In the circuit unit 3 </ b> B, a bracket 321 made of an insulating material is placed on the front end surface of the radiation fin 311. The bracket 321 includes a flat plate portion 321a provided with a protruding boss 321c, and a rib portion 321b bent substantially perpendicularly from the outer edge of the flat plate portion 321a. The boss 321 c is provided with an insertion hole (not shown) through which the screw 322 is inserted in the axial direction, and the insertion hole of the boss 321 c is provided at the tip of the radiating fin 311 via the cylindrical spacer 323. It communicates with the screw hole.

  Further, a printed circuit board 324 mounted with components constituting the power conversion unit 30 to be described later is mounted on the boss 321c, and the printed circuit board 324 is interposed via a spacer 323 by a screw 322 inserted through the boss 321c. The heat radiating fins 311 are fixed.

  Further, an aluminum cover 325 having an opening on one surface is attached to the heat radiating plate 310 on the heat radiating fin 311 side so as to cover the bracket 321 and the printed board 324, and is screwed to the cover 312 of the radiating fin 311. Yes.

  The aluminum substrate 302 on which the diode module 301 is mounted and the printed circuit board 324 on which the power conversion unit 30 is mounted are electrically connected by lead wires 331, and the lead wire 331 is connected to the diode module 301. Lighting power is supplied via One end of the lead wire 331 is soldered on the aluminum substrate 302, and the other end of the lead wire 331 is connected to the printed circuit board 324 through the insertion hole 310 a of the heat sink 310.

  The arm 4 includes a pair of holding pieces 41 that sandwich the lamp 3 and an arm rotation shaft 42 that couples the pair of holding pieces 41 to each other. The lamp 3 is rotatably supported on the arm 4 by shaft screws attached to a pair of holding pieces 41, for example. Further, a columnar protrusion 42 a having a screw hole into which the lower surface of the plug 1 is screwed is provided at the center of the arm rotation shaft 42. The screw hole of the protrusion 42a is provided with a stopper portion (not shown) having a washer with a stopper that restricts rotation of the nut and the arm so that the plug 1 does not rotate 360 degrees or more. In addition, an insertion hole is formed in the central portion of the arm rotation shaft 42 including the protrusion 42a for passing a power line Y1 and a control line Y2 described later.

  Next, FIG. 5A is a cross-sectional view of FIG. 4 showing the configuration of the plug 1 taken along the line FF, and FIG. 5B is a cross-sectional view partially broken along the line GG of FIG. Each is shown. In the following description, the front side of FIG.

  The plug 1 configured by combining the main bodies 1a and 1b includes a hollow cylindrical plug body 11. A plug attachment portion 12 is provided on the upper surface of the plug body 11, and the plug attachment portion 12 is attached to the duct 2. And the plug attachment part 12 is each protrudingly provided with the flat attachment board 12b from the both sides | surfaces of the rectangular column-shaped column body part 12a. That is, the pair of mounting plates 12b protrude in opposite directions.

  In the plug body 11, a base portion 14 to which a pair of conductor plates 13 are attached is fitted. The pedestal portion 14 includes a rectangular parallelepiped base portion 14a and a flat plate-like projecting piece 14b attached to the approximate center of the front surface of the base portion 14a.

  The conductor plate 13 includes a connecting piece 13b, a plug blade 13a (power receiving portion) obtained by bending one end side of the connecting piece 13b at a substantially right angle, and an attachment piece 13c provided on the other end side of the connecting piece 13b.

  The attachment piece 13c is provided with a terminal portion 13d for connecting one end of the power supply line Y1 led out to the lamp 3. And the attachment piece 13c is arrange | positioned along the front surface of the base part 14, and the terminal part 13d screws the power wire Y1 to the front side of the base part 14. FIG. Moreover, the connection piece 13b is arrange | positioned along the up-down direction facing the side edge of the protrusion 14b, and the plug blade 13a is bent in the direction away from the protrusion 14b.

  And when the base part 14 is accommodated in the plug main body 11, the plug blade 13a is exposed from the opening 12c provided in the both sides | surfaces of the pillar part 12a, and each of the plug blade 13a is the same direction as the protrusion direction of the mounting plate 12b. It extends and protrudes from both side surfaces of the column body portion 12a. That is, the pair of plug blades 13a protrude in opposite directions.

  In addition, a groove 111 having an open top is formed on the side surface of the main body 1b in a direction orthogonal to the protruding direction of the mounting plate 12b (the right direction in FIG. 5B). The groove 111 is mounted so as to be displaceable in the vertical direction.

  FIG. 6 shows a simplified perspective view of the main body 1b from which the base portion 14 and the operation portion 15 are removed. FIG. 7A shows a plan view of the operation unit 15 viewed from the base unit 14 side, and FIG. 7B shows a plan view of the operation unit 15 viewed from the bottom side. Further, FIG. 8 shows a plan view of the platform 14 viewed from the operation unit 15 side.

  A spring accommodating portion 15a having a U-shaped cross section that opens the lower surface and accommodates the spring 16 is formed on the rear surface of the operation portion 15, and the upper end of the spring 16 abuts on the upper surface of the spring accommodating portion 15a. A lower end contacts the step part 111a of the groove part 111 provided in the main body 1b. A protrusion 15 b is provided on the back surface of the operation unit 15, and a state where the protrusion 15 b is in contact with the upper end edge of the groove 111 from below is an upper limit position of the operation unit 15. When the operation portion 15 is at the upper limit position, the fitting portion 15 d formed at the upper end of the operation portion 15 protrudes upward from the open end of the groove portion 111. And when the operation part 15 is displaced below from an upper limit position, the spring 16 is comprised so that it may compress.

  On the back surface of the operation unit 15, a substantially L-shaped contact 17 is inserted between a pair of engaging protrusions 15c and 15c provided below the protrusion 15b. The contact 17 is fixed between the engagement protrusions 15c and 15c.

  In addition, a substantially U-shaped projection 14b having an open lower side is formed on the rear surface of the base portion 14a facing the back surface of the operation unit 15. A contact 18 having an elastic piece 18 a whose upper end is bent at an acute angle is attached to the protrusion 14 b, and the elastic piece 18 a protrudes to the back side of the operation unit 15.

  And when the operation part 15 exists in an upper limit position, the contact 17 is located above the elastic piece 18a of the contact 18, and the contact 17 is not contacting the elastic piece 18a. On the other hand, when the operation unit 15 moves downward from the upper limit position, the contact 17 also moves downward, and the contact 17 contacts the elastic piece 18a. Each of the contacts 17 and 18 is soldered to one end of a pair of control lines Y2 and Y2. The contacts 17 and 18 constitute the switch S (see FIG. 1) of the present invention.

  A cable bush 19 is mounted on the lower surface of the plug main body 11, and the power line Y1 and the control line Y2 covered by the protective tube TU pass through the cable bush 19 and into the protrusion 42a, and the arm rotation shaft 42 Derived from the center of the outside. The protective tube TU covering the power supply line Y1 and the control line Y2 is introduced into the cover 325 through the cable bush 341 provided on the bottom surface of the cover 325 of the lamp 3 (see FIG. 4).

  The other ends of the power supply line Y1 and the control line Y2 introduced into the cover 325 are connector-connected to the printed circuit board 324 on which the power conversion unit 30 is mounted.

  Next, FIG. 1 shows an outline of an electric circuit composed of the plug 1, the duct 2, and the lamp 3, and FIG. 2 shows a circuit configuration of the power conversion unit 30.

  As shown in FIG. 1, the power conversion unit 30 mounted on the printed board 324 in the lamp 3 includes a filter circuit 31, a lighting circuit 32, a determination unit 33, and a control unit 34.

  As shown in FIG. 2, the filter circuit 31 includes a choke coil L1 inserted between both poles of a DC voltage supplied via the power line Y1, a capacitor C1 connected between the input ends of the choke coil L1, and a choke coil. And a capacitor C2 connected between the output terminals of L1. The filter circuit 31 prevents noise generated from the power conversion unit 30 from being conducted to the duct 2 side.

  The lighting circuit 32 includes an inductor L2, a switching element Q1, a resistor R1, and a diode D1. A series circuit of an inductor L2, a diode module 301, a switching element Q1, and a resistor R1 is formed between the output terminals of the filter circuit 31. Further, a regenerative diode D1 is connected in parallel to the series circuit of the inductor L2 and the diode module 301. The lighting power is supplied to the diode module 301 by driving the switching element Q1 on and off.

  The determination unit 33 includes a comparator CP1, a resistor R2, a capacitor C3, and a DC power supply E1. The DC voltage output from the filter circuit 31 is applied to the series circuit of the resistor R2 and the capacitor C3, and the voltage across the capacitor C3 is input to the non-inverting input of the comparator CP1. The voltage of the DC power supply E1 is input to the inverting input of the comparator CP1. Further, the switch S of the plug 1 is connected between both ends of the capacitor C3 via the control line Y2.

  That is, in the determination unit 33, when the switch S is turned off (the contact 17 and the contact 18 are not connected), the output of the comparator CP1 becomes H level, and the switch S is turned on (the contact 17 and the contact 18 is connected). In this case, the output of the comparator CP1 becomes L level.

  The control unit 34 includes a comparator CP2, a logic circuit K1, a drive circuit K2, and a DC power supply E2. The comparator CP2 inputs the voltage across the resistor R1 to the non-inverting input, and inputs the voltage of the DC power supply E2 to the inverting input. That is, the comparator CP2 compares a current supplied to the diode module 301 (hereinafter simply referred to as “LED current”) with a threshold value, and outputs the comparison result. Based on this comparison result, the logic circuit K1 outputs a control signal for controlling the LED current to a desired current value to the drive circuit K2. Based on this control signal, the drive circuit K2 outputs a drive signal for driving the switching element Q1 on and off via the resistor R3.

  Furthermore, the output of the determination unit 33 is also connected to the logic circuit K1. Then, when the switch S is turned off (the output of the comparator CP1 is H level), the logic circuit K1 controls the LED current to the rated current value based on the comparison result of the comparator CP2. Further, when the switch S is turned on (the output of the comparator CP1 is L level), the logic circuit K1 controls the LED current to zero (light-off state).

  The DC power supplies E1 and E2 serve as a control power supply that inputs a DC voltage divided by resistance.

  Next, the operation when the plug 1 is attached to and detached from the duct 2 will be described below with reference to FIGS. 3 (a) to 3 (c) and FIGS. 9 (a) and 9 (b).

  First, the duct 2 forms an opening 21 d in the longitudinal direction of the long hollow case 21, and holds a pair of conductors 22 along the longitudinal direction inside the case 21. For example, 24 V DC is applied between the pair of conductors 22.

  The case 21 is formed in an elongated hollow shape having a substantially rectangular cross section, and the rear wall portion 21a is attached to a structural surface such as a ceiling surface or a wall surface. Side wall portions 21b extend substantially vertically from both side edges (that is, longitudinal edges) of the rear wall portion 21a, and a pair of front walls extend in a direction facing each other from the edge edges of the both side wall portions 21b. Wall part 21c is extended. An opening 21d along the longitudinal direction of the case 21 is formed between the pair of front wall portions 21c.

  A protruding wall 21e having a substantially H-shaped cross section stands on each inner surface of the side wall portions 21b. An insertion groove 21f is formed along the longitudinal direction of the case 21 between the protruding wall 21e and the front wall portion 21c. Further, an insertion groove 21g is formed at the tip of the protruding wall 21e along the longitudinal direction of the case 21, and a long conductor 22 is attached to the bottom surface of the insertion groove 21g.

  First, when the plug 1 is attached to the duct 2, the plug attachment portion 12 of the plug 1 opens the duct 2 in a state where the protruding direction of the mounting plate 12 b (the protruding direction of the plug blade 13 a) is aligned with the longitudinal direction of the duct 2. It is inserted into the part 21d. At this time, the upper end of the fitting portion 15d of the operation portion 15 contacts (interferences) with the outer surface of the front wall portion 21c of the duct 2, the operation portion 15 is displaced downward, and the switch S is turned on (see FIG. 3). State at time t1). Then, the plug mounting portion 12 inserted into the opening 21d slides while the mounting plate 12b is sandwiched between the insertion grooves 21f as the plug 1 rotates in one direction.

  FIG. 9A shows the state of the rotating plug 1 and the duct 2, and while the plug 1 is rotating in one direction, the upper end of the fitting portion 15d of the operation portion 15 is the duct. 2 is in contact (interference) with the outer surface of the front wall 21c. Therefore, the operation unit 15 is displaced downward and maintains the state of sliding on the outer surface of the front wall portion 21c, so that the switch S is maintained in the on state.

  Then, when the plug blade 13a contacts the conductor 22 while the plug 1 is rotating, power supply from the conductor 22 to the power conversion unit 30 is started via the plug 1, and the power conversion unit 30 An energized state is entered (state at time t2 shown in FIG. 3). However, since the switch S is maintained in the ON state, the output of the determination unit 33 becomes L level, the logic circuit K1 controls the LED current to zero, and the diode module 301 maintains the extinguished state.

  Then, as shown in FIG. 9B, when the plug mounting portion 12 rotates approximately 90 degrees in one direction, a notch 112 provided on a part of the outer periphery of the upper surface of the plug body 11 is formed on the lower surface of the case 21. Locks to the convex portion 21h provided at one side edge. At this time, the plug attachment portion 12 is in a state in which the protruding direction of the attachment plate 12b coincides with the short direction of the duct 2, and the fitting portion 15d of the operation portion 15 is positioned facing the opening portion 21d of the duct 2. . Then, the operating portion 15 is moved upward by the extension force of the spring 16 in a compressed state, the fitting portion 15d is displaced upward and is fitted into the opening portion 21d of the duct 2, and the switch S is turned off. (State at time t3 shown in FIG. 3). Accordingly, the output of the determination unit 33 becomes H level, and the logic circuit K1 controls the LED current to the rated current and turns on the diode module 301 (light output 100%).

  Here, until the plug mounting portion 12 rotates 90 degrees in one direction, the distal end surface of the plug blade 13a is in a halfway contact state where the surface of the conductor 22 is not sufficiently in contact. Therefore, in the present embodiment, when the plug 1 is attached to the duct 2, the switch S of the plug 1 is forced until the plug attachment portion 12 (plug blade 13a) reaches the attachment completion position rotated 90 degrees in one direction. Is turned on. That is, in the halfway contact state where the tip surface of the plug blade 13a is not sufficiently in contact with the surface of the conductor 22, the diode module 301 maintains the extinguished state, so that the power supplied to the lamp 3 can be suppressed. Therefore, when the plug 1 is attached to the duct 2, arc discharge generated between the plug blade 13a and the conductor 22 is more reliably suppressed, and problems such as overheating can be prevented.

  The attachment completion position is a rotation position at which the distal end surface of the plug blade 13a can sufficiently come into contact with the surface of the conductor 22, and in this embodiment, the plug attachment portion 12 (plug blade 13a). ) Is a position rotated 90 degrees in one direction as described above.

  Further, when the fitting portion 15d of the operation portion 15 is fitted into the opening 21d of the duct 2 at the attachment completion position, the operation portion 15 sets the rotation position of the plug 1 (the plug blade 13a) to the attachment completion position. It is also used as a positioning part to be fixed to. Therefore, the structure can be simplified.

  The operation unit 15 may not be used as the above-described positioning unit, and a dedicated positioning unit may be provided separately from the operation unit 15.

  Next, when removing the plug 1 from the duct 2, the user places a finger on the protrusion 15 e of the operation unit 15 and pushes down the operation unit 15, whereby the fitting unit 15 d is displaced downward, The fitting state with the opening 21d of the duct 2 is released. Then, when the operation unit 15 is displaced downward, the switch S is turned on. When the switch S is turned on, the output of the determination unit 33 becomes L level, and the logic circuit K1 controls the LED current to zero and turns off the diode module 301 (light output 0%) (at time t4 shown in FIG. 3). State).

  The plug mounting portion 12 slides while the mounting plate 12b is sandwiched between the insertion grooves 21f as the plug 1 rotates in the other direction.

  While the plug 1 is rotating in the other direction, the upper end of the fitting portion 15 d of the operation portion 15 is in contact (interference) with the outer surface of the front wall portion 21 c of the duct 2. Thus, the operating portion 14 is displaced downward, and the upper end of the fitting portion 14b maintains a state in which it slides on the outer surface of the front wall portion 21c of the duct 2. Therefore, since the diode module 301 maintains the extinguished state while the plug 1 is rotated in the other direction, the power supplied to the lamp 3 can be suppressed.

  Then, when the plug blade 13a is separated from the conductor 22 while the plug 1 is rotating, power supply from the conductor 22 to the power conversion unit 30 via the plug 1 is cut off, and the power conversion unit 30 is stopped. The state is reached (state at time t5 shown in FIG. 3). Since the power supplied to the lamp 3 is suppressed at the moment when the plug blade 13a is separated from the conductor 22, arc discharge generated between the plug blade 13a and the conductor 22 occurs when the plug 1 is removed from the duct 2. It is more reliably suppressed and problems such as overheating can be prevented.

  When the plug mounting portion 12 is rotated approximately 90 degrees in the other direction, the protruding direction of the mounting plate 12b (the protruding direction of the plug blade 13a) coincides with the longitudinal direction of the duct 2, and the plug mounting portion 12 is opened to the opening of the duct 2. It can be removed from the part 21d. At this time, the operation unit 15 is moved upward by the extension force of the spring 16 in the compressed state, and the switch S is turned off (at the time t6 shown in FIG. 3).

  Therefore, the diode module 301 is turned off while the plug 1 is attached to and detached from the duct 2, and arc discharge generated between the plug blade 13a and the conductor 22 is more reliably suppressed, and problems such as overheating are prevented. Can do.

  In addition, even when a plurality of lamps 3 attached to the duct 2 are lit, an arbitrary lamp 3 can be attached to and detached from the duct 2 without turning off these lamps 3.

(Embodiment 2)
In this embodiment, operation | movement of each part when the plug 1 is attached or detached to the duct 2 is shown to Fig.11 (a)-(c). The other configurations are the same as those of the first embodiment, and the same configurations are denoted by the same reference numerals and description thereof is omitted.

  When the switch S is turned off (the output of the comparator CP1 is at the H level), the logic circuit K1 of the present embodiment controls the LED current to the rated current value based on the comparison result of the comparator CP2. Further, when the switch S is turned on (the output of the comparator CP1 is L level), the logic circuit K1 adjusts the LED current to a predetermined current lower than the rated current, and sets the light output of the diode module 301 to a predetermined dimming level. Control (dimming lighting).

  Next, the operation when the plug 1 is attached to and detached from the duct 2 will be described below with reference to FIGS. 11 (a) to 11 (c) and FIGS. 9 (a) and 9 (b).

  First, when the plug 1 is attached to the duct 2, the plug attachment portion 12 of the plug 1 opens the duct 2 in a state where the protruding direction of the mounting plate 12 b (the protruding direction of the plug blade 13 a) is aligned with the longitudinal direction of the duct 2. It is inserted into the part 21d. At this time, the upper end of the fitting portion 15d of the operation portion 15 contacts (interferences) with the outer surface of the front wall portion 21c of the duct 2, the operation portion 15 is displaced downward, and the switch S is turned on (see FIG. 11). State at time t11). Then, the plug mounting portion 12 inserted into the opening 21d slides while the mounting plate 12b is sandwiched between the insertion grooves 21f as the plug 1 rotates in one direction.

  FIG. 9A shows the state of the rotating plug 1 and the duct 2, and while the plug 1 is rotating in one direction, the upper end of the fitting portion 15d of the operation portion 15 is the duct. 2 is in contact (interference) with the outer surface of the front wall 21c. Therefore, the operation unit 15 is displaced downward and maintains the state of sliding on the outer surface of the front wall portion 21c, so that the switch S is maintained in the on state.

  Then, when the plug blade 13a contacts the conductor 22 while the plug 1 is rotating, power supply from the conductor 22 to the power conversion unit 30 is started via the plug 1, and the power conversion unit 30 An energized state is entered (state at time t12 shown in FIG. 11). However, since the switch S is maintained in the ON state, the output of the determination unit 33 is at the L level, and the logic circuit K1 adjusts the LED current to a predetermined current lower than the rated current, and the light output of the diode module 301 is increased. Control to a predetermined dimming level.

  Then, as shown in FIG. 9B, when the plug mounting portion 12 rotates approximately 90 degrees in one direction, a notch 112 provided on a part of the outer periphery of the upper surface of the plug body 11 is formed on the lower surface of the case 21. Locks to the convex portion 21h provided at one side edge. At this time, the plug attachment portion 12 is in a state in which the protruding direction of the attachment plate 12b coincides with the short direction of the duct 2, and the fitting portion 15d of the operation portion 15 is positioned facing the opening portion 21d of the duct 2. . Then, the operating portion 15 is moved upward by the extension force of the spring 16 in a compressed state, the fitting portion 15d is displaced upward and is fitted into the opening portion 21d of the duct 2, and the switch S is turned off. (State at time t13 shown in FIG. 11). Accordingly, the output of the determination unit 33 becomes H level, and the logic circuit K1 controls the LED current to the rated current and turns on the diode module 301 (light output 100%).

  Here, until the plug mounting portion 12 rotates 90 degrees in one direction, the distal end surface of the plug blade 13a is in a halfway contact state where the surface of the conductor 22 is not sufficiently in contact. Therefore, in this embodiment, when the plug 1 is attached to the duct 2, the switch S of the plug 1 is forcibly turned on until the plug attachment portion 12 reaches the attachment completion position rotated 90 degrees in one direction. Yes. That is, in the halfway contact state where the tip surface of the plug blade 13a is not sufficiently in contact with the surface of the conductor 22, the diode module 301 maintains the dimming state, so that the power supplied to the lamp 3 can be suppressed. Therefore, when the plug 1 is attached to the duct 2, arc discharge generated between the plug blade 13a and the conductor 22 is more reliably suppressed, and problems such as overheating can be prevented.

  In this embodiment, when the plug 1 is attached to the duct 2, the diode module 301 transitions in the order of the off state → the dimming state → the all on state. Therefore, the visual adaptability of the worker who attaches the plug 1 to the duct 2 is improved as compared with the case where the diode module 301 transitions in the order of the light-off state to the full light-on state.

  The attachment completion position is a rotation position at which the distal end surface of the plug blade 13a can come into contact with the surface of the conductor 22 with a sufficient contact area capable of suppressing arc discharge.

  Further, when the fitting portion 15d of the operation portion 15 is fitted into the opening 21d of the duct 2 at the attachment completion position, the operation portion 15 sets the rotation position of the plug 1 (the plug blade 13a) to the attachment completion position. It is also used as a positioning part to be fixed to. Therefore, the structure can be simplified.

  Next, when removing the plug 1 from the duct 2, the user places a finger on the protrusion 15 e of the operation unit 15 and pushes down the operation unit 15, whereby the fitting unit 15 d is displaced downward, The fitting state with the opening 21d of the duct 2 is released. Then, when the operation unit 15 is displaced downward, the switch S is turned on. When the switch S is turned on, the output of the determination unit 33 becomes L level, and the logic circuit K1 adjusts the LED current to a predetermined current lower than the rated current and controls the light output of the diode module 301 to a predetermined dimming level. (State at time t14 shown in FIG. 11).

  The plug mounting portion 12 slides while the mounting plate 12b is sandwiched between the insertion grooves 21f as the plug 1 rotates in the other direction.

  While the plug 1 is rotating in the other direction, the upper end of the fitting portion 15 d of the operation portion 15 is in contact (interference) with the outer surface of the front wall portion 21 c of the duct 2. Thus, the operating portion 14 is displaced downward, and the upper end of the fitting portion 14b maintains a state in which it slides on the outer surface of the front wall portion 21c of the duct 2. Therefore, since the diode module 301 maintains the dimming state while the plug 1 is rotated in the other direction, the power supplied to the lamp 3 can be suppressed.

  Then, when the plug blade 13a is separated from the conductor 22 while the plug 1 is rotating, power supply from the conductor 22 to the power conversion unit 30 via the plug 1 is cut off, and the power conversion unit 30 is stopped. The state is reached (state at time t15 shown in FIG. 11). Since the power supplied to the lamp 3 is suppressed at the moment when the plug blade 13a is separated from the conductor 22, arc discharge generated between the plug blade 13a and the conductor 22 occurs when the plug 1 is removed from the duct 2. It is more reliably suppressed and problems such as overheating can be prevented.

  When the plug mounting portion 12 is rotated approximately 90 degrees in the other direction, the protruding direction of the mounting plate 12b (the protruding direction of the plug blade 13a) coincides with the longitudinal direction of the duct 2, and the plug mounting portion 12 is opened to the opening of the duct 2. It can be removed from the part 21d. At this time, the operation unit 15 is moved upward by the extension force of the spring 16 in the compressed state, and the switch S is turned off (at the time t16 shown in FIG. 11).

  In the present embodiment, when the plug 1 is removed from the duct 2, the light output of the diode module 301 transitions in the order of all lighting state → dimming state → off state or off state → dimming state → all lighting state. Therefore, the visual adaptability of the worker who removes the plug 1 from the duct 2 is improved as compared with the case where the light output of the diode module 301 transitions in the order of all lighting state → off state or off state → all lighting state. To do.

  That is, in the present embodiment, it is possible to achieve both suppression of arc discharge generated between the plug blade 13a and the conductor 22 and visual adaptability of the operator.

  For example, when the lamp 3 is a spotlight with a rated power of 10 W to 50 W, the dimming level at the time of dimming is set to 10% or less. The set value of the dimming level is set to a value at which arc discharge does not occur according to the rated voltage and rated current of the lamp 3.

  In addition, the control unit 34 increases or decreases the light output in a step shape at times t12 to t13 and times t14 to t15, thereby simplifying the dimming control. However, the control unit 34 is configured to gradually increase the light output during the time t12 to t13 from the extinguished state to the fully lit state, and gradually decrease the light output during the time t14 to t15 from the fully lit state to the extinguished state. May be. In this case, when the plug 1 is attached to and detached from the duct 2, the visual adaptability of the operator is further improved.

  Furthermore, even when a plurality of lamps 3 mounted on the duct 2 are lit, an arbitrary lamp 3 can be attached to and detached from the duct 2 without turning off these lamps 3.

  Moreover, the illumination system using the lighting fixture A of the above-described Embodiment 1 or Embodiment 2 is particularly useful in store lighting that frequently uses the configuration using the duct 2.

A Lighting fixture 1 Plug 13a Stopper blade (power receiving part)
DESCRIPTION OF SYMBOLS 15 Operation part S Switch 2 Lighting duct 22 Conductor 3 Lamp 32 Lighting circuit 33 Judgment part 34 Control part 301 Diode module (light source)

Claims (5)

A light source;
It is configured to be detachably attached to a lighting duct having a conductor to which direct current is energized, and includes a power receiving portion that comes into contact with the conductor when attached to the lighting duct, and from the conductor via the power receiving portion. A plug supplied with DC power;
A lighting circuit for supplying lighting power to the light source with the DC power supplied through the plug as an input;
A control unit for controlling the operation of the lighting circuit;
An operation unit that is displaced depending on whether or not the power reception unit is in an attachment completion position in contact with the conductor in a predetermined state;
A switch that switches a contact state according to the position of the operation unit;
A determination unit that determines whether or not the power reception unit is in the attachment completion position according to a contact state of the switch;
The control unit supplies the light source to the light source based on the determination result of the determination unit, when the power reception unit is not at the attachment completion position, compared to when the power reception unit is at the attachment completion position. A lighting apparatus characterized by suppressing power to be generated.   The lighting apparatus according to claim 1, wherein the control unit turns off the light source based on a determination result of the determination unit when the power reception unit is not in the attachment completion position.   The lighting apparatus according to claim 1, wherein the control unit causes the light source to be dimmed when the power receiving unit is not at the attachment completion position based on a determination result of the determination unit. The lighting duct has an opening in the longitudinal direction on one surface of a long hollow case, holds the conductor along the longitudinal direction inside the case, and the plug is attached to the one surface side of the case. ,
4. The illumination according to claim 1, wherein the power receiving unit is in contact with the conductor when the plug is inserted into the case through the opening and rotated in a predetermined direction. 5. Instruments. A lighting duct with a conductor energized by DC power,
An illumination system comprising one or more lighting fixtures according to any one of claims 1 to 4.

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