JP6421923B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture in which a fixture main body is attached to a construction material, and the fixture main body includes a main light source unit and a nightlight light source unit.

  The lighting apparatus includes a light source unit including a plurality of light source LED (Light-emitting Diode) chips, turns on a part of the plurality of light source LED chips of the light source unit, and uses a part of the lighted LED chip as a night light. What is used is known (Patent Document 1).

JP 2012-134037 A

By the way, since the lighting fixture of patent document 1 uses a part of light source LED as a nightlight, the color temperature (K (kelvin)) of nightlight LED cannot be changed with the color temperature of light source LED. In order to change the color temperature (K) of the nightlight LED, it is necessary to mount a dedicated nightlight LED and prepare a power source for the light source LED and the nightlight LED separately.
That is, it is necessary to provide a main light source unit and a nightlight light source unit separately, and prepare a power source for each light source unit separately. However, in this case, the potential difference between the main light source unit and the nightlight light source unit becomes large, and there remains room for improvement from this viewpoint.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lighting apparatus that can suppress a potential difference between a main light source unit and a nightlight light source unit to be small.

  The lighting fixture of the present invention is provided in the fixture main body in order to route the fixture main body supported by the construction material and the electric wire drawn from the construction material on the opposite side of the construction material in the fixture main body. A main light source comprising a lead-in hole and a circuit board supported by the instrument body, wherein a plurality of main light source LED chips are connected in series on the surface of the circuit board opposite to the instrument body. And a night light source having a night light LED chip, and the cathode side end of the main light source and the cathode side end of the night light source are connected to a common ground.

  According to the luminaire of the present invention, it is possible to provide a luminaire that can suppress a potential difference between the main light source unit and the nightlight source.

The disassembled perspective view which shows the state which looked at the lighting fixture of 1st Embodiment which concerns on this invention from the downward direction The disassembled perspective view which shows the state which looked at the lighting fixture of FIG. 1 from upper direction Sectional drawing which shows the state which assembled | attached the lighting fixture of FIG. Part I enlarged view of FIG. The top view which shows the state which looked at the circuit board of FIG. 1 from the surface side The circuit diagram explaining lighting operation of a 1st embodiment The circuit diagram explaining lighting operation of a 2nd embodiment

Hereinafter, the lighting fixture according to the embodiment will be described with reference to the drawings.
(First embodiment)
As shown in FIGS. 1 and 2, the lighting apparatus 10 includes an apparatus main body 14 attached to the ceiling 12 of the building material 11, a drawing hole 15 provided in the apparatus main body 14, and a setting so as to bypass the drawing hole 15. And a circuit board 16 supported by the main body 14.
A cushion 13 is interposed between the ceiling 12 and the instrument body 14 with the instrument body 14 attached to the ceiling 12 of the construction material 11.

Furthermore, the lighting fixture 10 includes a power source area cover 19 that covers the power source area 17 of the circuit board 16, a translucent cover 23 that covers the light emitting area 18 of the circuit board 16, and a globe 25 that is attached to the instrument body 14. Yes.
The glove 25 is a milky white light projecting member, and is detachably attached to the glove attachment member 26 of the instrument body 14 from below with engagement protrusions 25A (three of the six are used). In this state, the instrument body 14, the circuit board 16, the power supply area cover 19 and the translucent cover 23 are covered with the globe 25.

As shown in FIG. 3, the instrument body 14 is formed in a disc shape in plan view (see FIG. 1), and a drawing hole 15 is formed in the center. In the instrument main body 14, a contact surface 21 (see also FIG. 1) that bulges toward the circuit board 16 is formed in an annular shape around the drawing hole 15.
In addition, although embodiment demonstrates the example which attaches the instrument main body 14 directly to the ceiling 12 of the construction material 11, it does not limit to this, The instrument main body 14 is attached to the ceiling 12 of the construction material 11 using a chain, a wire, etc. It is also applicable when suspending

The lead-in hole 15 is a hole for routing the electric wire 27 drawn out from the ceiling 12 of the construction material 11 on the opposite side of the fixture body 14 from the ceiling 12 of the construction material 11. The electric wire 27 passed through the drawing hole 15 is inserted into the terminal 28 of the lighting fixture 10. The terminal 28 is provided in the power supply region 17 of the circuit board 16.
The circuit board 16 is formed in a planar shape that bypasses the drawing hole 15, and the circuit board 16 is in contact with the contact surface 21 of the instrument body 14 from below.

As shown in FIGS. 4 and 5, the circuit board 16 is formed in a substantially donut shape with a hollow portion 29 corresponding to the lead-in hole 15 being opened at the center. As for this circuit board 16, the instrument main body 14 side is formed in the back surface 16A, and the opposite side to the instrument main body 14 is formed in the surface 16B.
A power source region 17 and a light emitting region 18 are provided on the surface 16B. A light emitting region back surface 16C corresponding to the light emitting region 18 is formed on the back surface 16A.

The contact surface 21 of the instrument main body 14 is in contact with the light emitting region back surface 16C. Therefore, the contact surface 21 is in contact with a portion corresponding to the circuit pattern of the power source region 17 that connects the LED chips of the main light source unit 36 and the nightlight light source unit 41 in the light emitting region back surface 16C.
Thereby, the heat of the circuit board 16 can be efficiently radiated to the contact surface 21.

On the surface 16 </ b> B of the circuit board 16, a power source region 17 is provided at the center side, and a light emitting region 18 is provided outside the power source region 17. The power source region 17 is formed in a ring shape in a region near the drawing hole 15, and the light emitting region 18 is formed in a ring shape in a region far from the drawing hole 15.
Therefore, the power supply region 17 and the light emitting region 18 can be connected by a circuit pattern.

The power supply region 17 is formed on the drawing hole 15 side, and the light emitting region 18 is formed away from the drawing hole 15, so that the power supply region 17 and the light emitting region 18 are arranged so as not to overlap each other in the vertical direction.
A large number of electronic components 34 (including terminals 28 for inserting the electric wires 27 (see FIG. 3)) are mounted in the power supply region 17 as the power supply unit 33. By mounting each electronic component 34 on the power supply region 17, the lead protrusion 35 of each electronic component 34 protrudes toward the back surface 16 </ b> A side of the circuit board 16. Further, electronic components 47 and 48 as the power supply unit 33 are also arranged.

  In addition, a main light source unit 36 and a night light source 41 are provided in the light emitting region 18. A large number of main light source LED chips 37 are connected in series to the main light source portion 36 and mounted in an arcuate shape along the outer periphery 16D of the circuit board 16. The night light source 41 is provided adjacent to the cathode 45 of the main light source 36, and the night light LED chip 42 is mounted on the night light source 41.

  The main light source part 36 is arranged so that each main light source LED chip 37 circulates around the hollow part 29. The anode 46 of the main light source unit 36 is connected to the positive electrode (plus) of the electronic component 47 of the power source unit 33, and the cathode 45 of the main light source unit 36 is connected to the negative electrode (minus; ground) of the electronic components 47 and 48.

  Here, the night light source 41 from the anode 46 of the main light source 36 is arranged at a predetermined interval L1. Preferably, a slit 49 is formed between the anode 46 of the main light source 36 and the night light source 41.

The cathode 51 of the night light source 41 is connected to the cathode 45 of the main light source 36, and the cathode 51 of the night light source 41 is connected to the electronic component 48.
That is, the cathode 45 of the main light source unit 36 and the cathode 51 of the nightlight light source unit 41 are connected to the ground of the electronic components 47 and 48 common to the main light source unit 36 and the nightlight light source unit 41.

  Electric power is supplied from the power supply unit 33, and current flows through the anodes 46 of the main light source unit 36 to a large number of main light source LED chips 37. The current that has flowed through the multiple main light source LED chips 37 flows to the ground side of the electronic component 47 through the cathode 45 of the main light source unit 36. Thereby, many main light source LED chips 37 emit light.

  Further, the light flows from the power source 33 to the night light LED chip 42 through the anode 52 of the night light source 41. The current flowing through the nightlight LED chip 42 flows to the ground side of the electronic component 48 through the cathode 51 of the nightlight light source unit 41. Thereby, the nightlight LED chip 42 emits light.

Thus, by connecting the cathode 45 side end of the main light source unit 36 and the cathode 51 side end of the nightlight light source unit 41 to a common ground, that is, by connecting them to the ground of the common electronic components 47 and 48. The night light source 41 can be mounted (connected) adjacent to the cathode 45 side of the main light source 36.
Current flows from the anode 46 side of the main light source unit 36 to the cathode 45 side through the main light source LED chip 37, while in the nightlight light source unit 41, it flows from the power source 33 to the nightlight LED chip 42 through the anode 52. Since the number of nightlight LED chips 42 is about 1 to 2, the generated voltage is about 3 to 6V. Thereby, the electric potential difference of the main light source part 36 and the nightlight light source part 41 can be restrained small.

  Further, the night light source 41 is disposed at a predetermined interval L1 from the anode 46 of the main light source 36, and preferably, the slits 49 are formed at the predetermined interval L1, so that the anode 46 and the night light source of the main light source 36 are formed. The short circuit of the part 41 can be reliably prevented.

  Further, each main light source LED chip 37 of the main light source part 36 is arranged so as to circulate around the hollow part 29. Therefore, a large distance from the anode 46 side to the cathode 45 side of the main light source unit 36 can be secured. As a result, the potential on the cathode 45 side of the main light source unit 36 can be suitably reduced, and the potential difference between the main light source unit 36 and the nightlight source 41 can be further reduced.

  Further, the nightlight LED chip 42 of the nightlight light source unit 41 is provided in the same light emitting area 18 as each main light source LED chip 37 of the main light source unit 36. Therefore, compared with the case where the nightlight light source unit 41 is provided in a place other than the light emitting region 18, a cover member (for example, a nightlight dedicated lens or case) covering the nightlight light source unit 41 can be eliminated, and the number of parts can be reduced and the assembly can be reduced. Ease of operation is improved and cost reduction is achieved.

Next, operations of the main light source unit 36 and the nightlight light source unit 41 will be described with reference to a circuit shown in FIG.
As shown in FIG. 6, the flyback circuit converts the full-wave rectified input voltage into a DC voltage. When the switch Q1 is turned on, energy is accumulated on the primary side of the flyback transformer T1, and when the switch Q1 is turned off, the capacitor C3 is charged from the secondary side via the diode D2.

  The output voltage is converted to a voltage by the resistor R2 and compared with the reference voltage by the constant current feedback circuit unit 61. The output of the constant current feedback circuit unit 61 is input to the FB (feedback) terminal of the primary control IC 62 via an insulation signal transmission unit such as a photocoupler, and determines the ON time of the switch Q1. When the current increases, constant current control is performed by shortening the ON width.

  As described above, in the lighting fixture 10 of the embodiment, the fixture main body 14 supported by the construction material 11 and the electric wires 27 drawn from the construction material 11 are routed on the opposite side of the construction material 11 from the construction material 11. In order to do this, a lead-in hole 15 provided in the instrument body 14 and a circuit board 16 supported by the instrument body 14 are provided.

  The circuit board 16 has a main light source portion 36 formed by connecting a large number of main light source LED chips 37 in series on a surface 16B of the circuit board 16 opposite to the fixture body 14, and an nightlight having an nightlight LED chip 42. And a light source unit 41. Furthermore, the cathode 45 side end of the main light source unit 36 and the cathode 51 side end of the night light source 41 are connected to a common ground.

  Preferably, in the luminaire 10, the circuit board 16 is formed in a planar shape having a hollow portion 29 that bypasses the drawing hole 15, and each main light source LED chip 37 of the main light source portion 36 is centered on the hollow portion 29. It arrange | positions so that it may wrap around and the nightlight LED chip 42 is arrange | positioned in the same light emission area | region as each main light source LED chip 37 on the surface.

(Second Embodiment)
Next, operations of the main light source unit 36 and the nightlight light source unit 41 will be described with reference to the circuit of the second embodiment shown in FIG. FIG. 7 shows a step-down chopper circuit configuration using, for example, R2A20134 (Renesas) as the switching power supply control IC 2 (step-down chopper control IC (IC2) 71) (detailed circuits around the IC are omitted).

As shown in FIG. 7, after the input power is turned on, the control power supply voltage Vcc is generated by the diode D3 and the resistor R3. When the control power supply voltage Vcc reaches 13V (Typ), the step-down chopper control IC (IC2) 71 is activated. The gate signal is output to the switch Q2 (MOS-FET). By this oscillation operation, power is supplied to the LED as a load.
The operation when the switch Q2 is turned on will be described. A current flows through a path of LED → step-down chopper choke L1 → switch Q2 using the PFC output voltage Vdc as a power source. Next, the operation when the switch Q2 is turned off will be described. When the switch Q2 is turned off, a back electromotive force is generated in the step-down chopper choke L1, a current flows through the path of the diode D2 → LED, and is accumulated in the step-down chopper choke L1. The released energy is released.

  The output current Io of the LED will be described. The current I flowing through the step-down chopper choke L1 is a triangular wave, and the output current Io is an average value of IL1 (the triangular wave current is smoothed by the capacitor C3).

  Further, the output current control of the step-down chopper control IC (IC2) 71 will be briefly described. When the switch Q2 is on, the step-down chopper control IC (IC2) 71 is detected by the detection resistor R2 (IC2 threshold voltage), and the step-down chopper choke L1 When the peak current IL1p is detected and reaches a threshold value, the switch Q2 is turned off. The timing for turning on the switch Q2 is determined by detecting the release of the stored energy of the step-down chopper choke L1.

  When the switch Q2 is turned off, specifically, the timing of turning off the switch Q2 is obtained by detecting the current release (zero cross) of the step-down chopper choke L1 by the detection resistor R2. With the above control, the switch Q2 (MOS-FET) is switched to control the step-down chopper.

Next, the lighting mode switching control circuit 72 will be described.
Upon receiving a signal from the remote control light receiving circuit 73, the lighting mode is controlled. When the main light source LED chip 37 is lit, a lighting on signal is input to the on / off terminal of the step-down chopper control IC (IC2) 71. Since the ground level of the step-down chopper control IC (IC2) 71 is different, a signal is input by a level shift circuit (photocoupler, transformer, etc.).
When the night light LED chip 42 is lit, a lighting on signal is input to the on / off circuit.

In addition, the lighting fixture of this invention is not limited to embodiment mentioned above, A change, improvement, etc. are possible suitably.
For example, the lighting fixture, construction material, fixture body, lead hole, circuit board, electric wire, hollow portion, main light source portion, main light source LED chip, nightlight light source portion, nightlight LED chip, cathode of the main light source portion used in the embodiment The shape and configuration of the ground and the cathode of the night light source are not limited to those illustrated, but can be changed as appropriate.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 11 Construction material 14 Appliance main body 15 Lead-in hole 16 Circuit board 16B Circuit board surface 27 Electric wire 29 Hollow part 36 Main light source part 37 Main light source LED chip 41 Nightlight light source part 42 Nightlight LED chip 45 Cathode of main light source part 46 Main Anode of light source part 47 Electronic component 48 Electronic part 51 Cathode of nightlight light source part 52 Anode of nightlight light source part

Claims (2)

An instrument body supported by construction materials;
A lead-in hole provided in the instrument body for routing the electric wire drawn from the construction material to the side opposite to the construction material in the instrument body;
A circuit board supported by the instrument body,
The circuit board is
The circuit board is formed in a planar shape having a hollow portion around the drawing hole at the center,
On the surface of the circuit board opposite to the appliance main body, a main light source unit formed by connecting a large number of main light source LED chips in series, and a nightlight light source unit having a nightlight LED chip,
In the surface, the nightlight LED chip is disposed in the same light emitting area as each of the main light source LED chips,
The cathode side end of the main light source part and the cathode side end part of the nightlight light source part extend toward the center of the circuit board, respectively, in the surface area closer to the hollow part than the light emitting area. A luminaire connected to a common ground located . The lighting fixture according to claim 1,
The main light source unit is a lighting fixture in which the main light source LED chips are arranged so as to circulate around the hollow part.

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