JP5825541B2 - Lamp apparatus and lighting apparatus - Google Patents

Description

  FIELD Embodiments described herein relate generally to a lamp device using a semiconductor light emitting element and a lighting fixture using the lamp device.

  Conventionally, as a flat lamp device, a lamp device using a GX53 type base has been provided. In some lamp apparatuses, light emitted from the lamp apparatus is distributed at a narrow angle by a light control body, and the light distribution is suitable for downlights and spotlights (see, for example, Patent Document 1). This prior art lamp device has an annular contact surface provided with a pair of lamp pins and a protrusion projecting from the center side of the contact surface to one surface side, and an LED is mounted on the inner surface side of the protrusion. And a flat lamp device body (housing) that emits LED light from at least the other surface side, and a light control body having a cylindrical reflection surface portion is disposed on the lamp device body. It is arranged so as to be able to advance and retreat in the direction of the other surface. And the lighting device which lights LED is accommodated and arrange | positioned by the cyclic | annular space part between a lamp device main body and the outer peripheral surface of the reflective surface part of a light control body.

  A lighting circuit of this type of lighting device includes an AC-DC conversion circuit that generates a DC power supply from an AC power supply, and an output voltage of the AC-DC conversion circuit that is adjusted by a switching operation of a switching element, and a predetermined current (power) ) Is generally provided. In the lamp device, the arrangement of the switching element and the lamp pin is not described. If they are close to each other, there is a concern that noise due to the switching operation of the switching element is superimposed on the lamp pin.

JP 2010-262781 (page 5, FIG. 1)

  As described above, in the flat lamp device having the cylindrical light control body, the lighting device is housed and disposed in the annular space portion between the lamp device main body and the outer peripheral surface of the reflection surface portion of the light control body. As a result, the mounting surface of the circuit board is reduced, and the switching element and the lamp pin connected to the input unit of the lighting device are brought close to each other, and noise generated in the switching element is exchanged via the lamp pin. There is a problem that it can be easily superimposed on the power supply. In addition, if a high-performance noise filter circuit is provided in the lighting circuit to suppress noise generated in the switching element, the number of lighting circuit components increases, and the mounting of the lighting circuit components on the circuit board is restricted. There is a problem.

  An object of the present invention is to provide a lamp device capable of performing light distribution control with a cylindrical light control body and suppressing noise superimposition to an external power source, and a lighting fixture using the lamp device.

  The lamp device according to the embodiment includes a light emitter, a lighting device, and a housing.

  The light emitter has a semiconductor light emitting element.

The lighting device lights a semiconductor light emitting element, and includes a circuit board and a lighting circuit. The circuit board is provided with a lighting circuit. The lighting circuit includes a switching element that switches at a high frequency, and is formed to light the semiconductor light emitting element. Further, the lighting circuit has a pair of power input terminals that are provided on one surface of the circuit board and spaced apart on the peripheral side . The switching element is provided on the other surface of the circuit board in a region opposite to the pair of power supply input terminals with respect to the center line of the circuit board parallel to a virtual line connecting the pair of power supply input terminals. The pair of output terminals is a region of the pair of power input terminals from the center line of the circuit board, and the distance between the pair of output terminals is smaller than the distance between the pair of power input terminals.

  The casing is provided with a power feeding unit and a lighting device. A pair of power input terminals of the lighting device is electrically connected to the power feeding unit.

  According to the present invention, the switching element of the lighting circuit is provided in a region on the opposite side of the pair of power input terminals from the center line of the circuit board that is parallel to a virtual line connecting the pair of power input terminals. The switching element and the pair of power supply input terminals are separated from each other, and noise generated in the switching element is hardly superimposed on the pair of power supply input terminals, so that it can be expected that the noise can be suppressed from being superimposed on the external AC power supply.

It is a schematic front view of the lamp device which shows Example 1 of this invention. Similarly, a lamp device is shown, (a) is a schematic top view, and (b) is a schematic bottom view. Similarly, it is a schematic front sectional view of the lamp device. Similarly, it shows a lighting device, (a) is a schematic top view, (b) is a schematic bottom view. Similarly, it is a schematic circuit diagram of a lighting device. It is a schematic perspective view of the lighting fixture which shows Example 2 of this invention. Similarly, it is a partially cutaway schematic front view of a lighting fixture.

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

  The lamp device 1 of the present embodiment is configured as shown in FIGS. In FIG. 3, the lamp device 1 includes a light emitter 2, a lighting device 3, a housing 4, and a light control body 5.

  The light-emitting body 2 is formed having a flat substrate 6, a plurality of LED bare chips 7 as semiconductor light-emitting elements provided on one surface 6 a of the substrate 6, and a sealing resin 8 that covers the LED bare chips 7. . The substrate 6 is made of, for example, an aluminum (Al) plate and is formed in a substantially rectangular shape. The LED bare chip 7 is mounted on one surface 6a via an insulating layer (not shown) to form a wiring pattern (not shown). The LED bare chips 7 are connected in series by a wiring pattern. Further, a connector 9 is disposed on one surface 6 a of the substrate 6, and the output cord 10 of the lighting device 3 is connected to the connector 9.

  The LED bare chip 7 is mounted on one surface 6a of the flat substrate 6 so as to be provided in a planar shape, and a plurality of the LED bare chips 7 are mounted in a matrix, for example. The LED bare chip 7 emits blue light, for example. On one surface 6 a of the substrate 6, for example, a bank 11 made of silicone resin is formed in a rectangular shape so as to surround the plurality of LED bare chips 7. The inside of the bank 11 is filled with a sealing resin 8 to fill the LED bare chip 7. The outer surface of the sealing resin 8 is formed in a flat shape.

  The sealing resin 8 is a translucent silicone resin, for example, and a yellow phosphor 12 is mixed therein. When the blue light emitted from the LED bare chip 7 is incident, the yellow phosphor 12 converts the wavelength of the blue light into yellow light. The yellow light and the blue light emitted from the LED bare chip 7 are emitted from the outer surface of the sealing resin 8 and mixed (mixed light), whereby white light is emitted from the light emitter 2. The outer surface of the sealing resin 8 is a light emitting surface of the light emitter 2.

  The lighting device 3 has a lighting circuit 15 formed by a circuit board 13 and a lighting circuit component 14 mounted on the circuit board 13. As shown in FIG. 4, the circuit board 13 is made of, for example, a glass epoxy material, is formed in a substantially circular shape, and is provided with a circular opening 16 having a notch portion 16 a at the center thereof. On one surface 13a of the circuit board 13 around the opening 16, a lighting circuit component 14 composed of many types and many electronic components such as resistors R1 to R3, a capacitor C1, and a transformer T1 is mounted. Further, the other surface 13b of the circuit board 13 is a solder surface of the lighting circuit component 14, and a small surface mount component such as the switching element Q1 is mounted thereon. A lighting circuit 15 is formed by a lighting circuit component 14 mounted on the circuit board 13 and a wiring pattern (not shown) formed on the circuit board 13.

  As shown in FIG. 5, the lighting circuit 15 includes a DC power supply circuit 17, a step-down chopper circuit 18, a current detection circuit 19, and a control circuit 20.

  The DC power supply circuit 19 includes a noise filter circuit 22 including a rectifier 21, a capacitor C1, and a transformer T1. The input terminal of the rectifier 21 is connected to a pair of input power supply terminals 23 a and 23 b via a noise filter circuit 22. The pair of input power supply terminals 23a and 23b is connected to a commercial AC power supply Vs. The DC power supply circuit 19 converts the AC voltage of the commercial AC power supply Vs into a DC voltage and outputs it between both ends of the capacitor C1.

  The step-down chopper circuit 18 is formed by a known circuit configuration having a switching element Q1, a diode D1, an inductor L1, and a smoothing capacitor C2. Then, the DC voltage generated across the capacitor C1 is chopped by the on / off operation of the switching element Q1, and a predetermined DC voltage is output across the smoothing capacitor C2. The switching element Q1 performs switching at a high frequency of 50 to 80 KHz, for example.

  The current detection circuit 19 is formed with a resistor R3 and detects the current flowing through the LED bare chip 7. Then, the control circuit 20 controls the on / off operation of the switching element Q1 of the step-down chopper circuit 18 so that a predetermined current flows through the LED bare chip 7. Further, when a dimming signal is input from the outside, the control circuit 20 controls the on / off operation of the switching element Q1 according to the dimming signal.

  Both ends of the smoothing capacitor C <b> 2 are connected to the output terminals 24 a and 24 b via the current detection circuit 19. The output terminals 24 a and 24 b are provided on the output connector 25. The output terminals 24 a and 24 b are connected to the LED circuit 26 of the LED bare chip 7 connected in series via the output cord 10. Thus, the lighting circuit 15 (lighting device 3) includes the switching element Q1 that switches at a high frequency, and is formed to light the LED bare chip 7.

  In FIG. 4, the pair of power input terminals 23 a and 23 b are provided on the circuit board 13 so as to be adjacent to each other on the peripheral side of the one surface 13 a. For example, it is disposed at a rotational position of, for example, 45 ° with respect to the center 13 c of the circuit board 13. The power input terminals 23a and 23b are connected to lamp pins 32 and 32, which will be described later, by lead wires 27, respectively. The output connector 25 having the output terminals 24a and 24b is mounted on the one surface 13a of the circuit board 13 in the vicinity of the power input terminals 23a and 23b.

  The switching element Q1 is parallel to a virtual line A connecting the pair of power input terminals 23a and 23b, and is opposite to the pair of power input terminals 23a and 23b from the center line B passing through the center 13c of the circuit board 13. In the region (shaded area in the figure). As shown in FIG. 4B, the switching element Q1 is mounted on the region of the other surface 13b of the circuit board 13. The switching element Q1 may be mounted on either the one surface 13a or the other surface 13b of the circuit board 13 as long as it is provided in the region of the circuit board 13.

  3, the casing 4 is formed in a substantially cylindrical shape by a synthetic resin such as polybutylene terephthalate (PBT) resin, and has a base portion 28 as a GX53-type base on one end side 4a and an opening portion 29 on the other end side 4b. Each is provided. The base portion 28 has a top plate portion 30. On the top surface 30a of the top plate portion 30, a cylindrical protrusion 31 protruding outward at the center thereof, and a pair of lamp pins 32 and 32 (in FIG. 3, as power feeding portions adjacent to the protrusion 31) Only one of them is shown).

  Further, on the lower surface 30 b of the top plate portion 30, a cylindrical projecting body 33 that communicates with the upper surface 30 a and projects slightly downward is disposed at the center thereof. The protrusion 33 has a columnar portion 33a having a cylindrical through hole slightly smaller than the circular opening 16 of the circuit board 13 and a square (not shown) having a substantially quadrangular columnar through hole smaller than the cutout portion 16a. It is formed in a columnar part.

  On the upper surface of the protruding portion 31, a lid portion 34 formed by, for example, aluminum die casting is attached. The lid portion 34 is formed with a thick and rectangular parallelepiped mounting portion 35 on the inner surface 34b side thereof. The light emitter 2 is attached to the attachment portion 35 with a screw (not shown) through an insulating plate (not shown).

  A substantially rectangular parallelepiped fixing portion 36 is formed from the protruding portion 31 toward the outer peripheral edge of the lid portion 34. A key portion 37 is provided at the tip of the fixed portion 36. Further, the fixing portion 36 is provided with a screw hole 38. As shown in FIG. 2A, three fixing portions 36 are formed at intervals of 120 ° with respect to the center 34 c of the lid portion 34.

  As shown in FIG. 3, a columnar dowel 40 having a stepped through hole 39 is formed on the top surface 30 a of the top plate portion 30 so as to protrude from the fixed portion 36. A screw 41 inserted into the through hole 39 from the lower surface 30 b of the top plate portion 30 is screwed into the screw hole 38 of the fixing portion 36. Thereby, the lid body 34 is attached to the protruding portion 31. The protrusion 31 is cut out at a portion corresponding to the fixed portion 36.

  The lid 34 slightly protrudes in the normal direction of the outer peripheral surface from the outer peripheral surface of the protruding portion 31, and further the key portion 37 protrudes. The lid 34 substantially seals the protruding portion 31. The key part 37 is inserted and attached to a key groove of a socket to which the lamp device 1 is attached.

  Thus, the light emitter 2 attached to the lid 34 is accommodated in the protrusion 31 by attaching the lid 34 to the protrusion 31. Note that a heat radiating sheet (not shown) is disposed on the upper surface 34 a of the lid 34. The screw hole 38 of the lid 34 is closed on the upper surface 34a side by the heat dissipation sheet.

  The pair of lamp pins 32, 32 as the power feeding portion is made of, for example, brass, and is formed in a substantially cylindrical shape whose top side is formed in a substantially hemispherical shape. It is provided so as to protrude upward. The lamp pins 32 and 32 are provided corresponding to the power input terminals 23 a and 23 b provided on the circuit board 13 of the lighting device 3, and when the lighting device 3 is disposed in the housing 4, the power input is performed. It is provided at a portion located in the vicinity of the terminals 23a and 23b.

  A pair of dowels 42 having through-holes projecting downward with a small projecting length are formed on the lower surface 30 b of the top plate 30. The lamp pin 32 is press-fitted and attached to the dowel 42. The lamp pin 32 is inserted into the lead wire 27 connected to the power input terminals 23a and 23b, and the lead wire 27 is soldered on the top side. Thus, the pair of lamp pins 32 and 32 are electrically connected to the pair of power input terminals 23 a and 23 b of the lighting device 3. The lighting device 3 is disposed between the base portion 28 and the opening portion 29 in the housing 4.

  A protective cover 43 is attached to the opening 29. The protective cover 43 is molded from, for example, a polycarbonate (PC) resin having translucency. The outer surface 43a is a flat surface and is formed in a circular shape. A plurality of protrusions 44 along the inner surface 29b of the opening 29 are intermittently provided on the inner surface 43b. Some of the protrusions 44 are provided with a locking claw 45, and the locking claw 45 is locked in a locking groove 46 formed in the inner surface 29 b of the opening 29. Thereby, the protective cover 43 is attached to the opening 29 of the housing 4. The protective cover 43 is attached so as to substantially close the inside of the housing 4.

  Further, on the peripheral side of the outer surface 43a of the protective cover 43, rectangular parallelepiped finger-hanging portions 47, 47 are formed to project. As shown in FIG. 2 (b), the finger hooks 47, 47 are provided with 180 ° rotational symmetry. In addition, a triangular mark 48 is provided on the peripheral side of the outer surface 43a to display the mounting position on the lighting fixture.

  And as shown in FIG. 1, the triangular recessed part 49 is formed in the outer peripheral surface by the side of the nozzle | cap | die part 28 of the housing | casing 4 with a fixed space | interval.

  In FIG. 3, the light control body 5 is formed by, for example, aluminum die casting, and has a truncated cone shape that expands continuously and stepwise from the one end side 5 a toward the other end side 5 b. A circular flange portion 50 is formed on the end side 5b. The light control body 5 has a circular one end side opening 51 on one end side 5a and a circular other end side opening 52 on the other end side 5b, and an inner surface 5d thereof is formed on a reflection surface.

  The light control body 5 has one end side 5 a inserted through the opening 16 of the circuit board 13 of the lighting device 3 and is inserted into the protrusion 33 of the housing 4. The protective cover 43 is attached to the opening 29 of the housing 4 so that the one end side opening 51 faces the light emitter 2, the other end side opening 52 is located in the opening 29, and the flange portion 50. Is in contact with the inner surface 43 b of the protective cover 43.

  As for the circuit board 13, the peripheral side of the opening 16 is sandwiched between the outer surface 5c of the light control body 5 and the protrusion 33 of the housing 4, and movement in the vertical direction in FIG. Further, the circuit board 13 has a rectangular columnar portion (not shown) of the protrusion 33 inserted in the notch 16a of the opening 16, thereby restricting rotation in the circumferential direction. Thus, the lighting device 3 and the light control body 5 are accommodated and disposed in the housing 4.

  Next, the operation of the first embodiment of the present invention will be described.

  The protruding portion 31 of the housing 4 is inserted into the insertion hole of the socket device (not shown), the pair of lamp pins 32, 32 are inserted into the connection holes of the socket device, and the housing 4 is rotated, whereby the pair of lamp pins 32 and 32 are electrically connected to a pair of receptacles of the socket device. Thereby, the lighting device 3 can supply an external power supply through the socket device.

  In addition, when inserting the protrusion part 31 in the insertion hole of a socket apparatus, the mark 48 of the protective cover 43 is aligned with the alignment mark provided in a lighting fixture or a socket apparatus. The key portion 37 of the lid 34 is inserted into the key groove of the socket device when the protruding portion 31 is inserted into the insertion hole of the socket device, and into the key groove when the housing 4 is rotated. Fixed.

  When the external power supply is turned on, an AC voltage (for example, AC 100 V) of the external power supply is input to the lighting device 3 via the pair of lamp pins 32 and 32 and the lead wires 27 and 27. In the lighting device 3, the lighting circuit 15 operates such that the switching element Q <b> 1 switches at a high frequency, for example, 50 to 80 KHz, and supplies a constant current to the light emitter 2 via the output code line 10. Thereby, the LED bare chip 7 is turned on, and white light is emitted from the light emitter 2. The emitted light is controlled to have a narrow-angle light distribution by the light control body 5, and is emitted through the protective cover 43. The emitted light illuminates the outer surface to be irradiated and the object to be irradiated with a narrow-angle light distribution.

  When the switching element Q1 of the lighting circuit 15 of the lighting device 3 performs a switching operation (on / off operation) at a high frequency, high-frequency noise is generated. This noise is absorbed by the noise filter circuit 22 of the lighting circuit 15. The switching element Q1 is provided in a region on the opposite side of the pair of power input terminals 23a and 23b from the center line B of the circuit board 13 parallel to the virtual line A connecting the pair of power input terminals 23a and 23b. Since the pair of power input terminals 23a and 23b are separated from each other, noise generated by the switching operation of the switching element Q1 is caused by the lamp pins 32 and 32 via the pair of power input terminals 23a and 23b and the lead wires 27 and 27. It becomes difficult to propagate to. That is, the noise from the lighting device 3 is suppressed from being superimposed on the AC voltage of the commercial AC power supply Vs.

  As described above, the lamp device 1 according to the present embodiment has a pair of switching elements Q1 of the lighting device 3 that are more paired than the center line B of the circuit board 13 that is parallel to the virtual line A that connects the pair of power input terminals 23a and 23b. Since the switching element Q1 and the pair of power supply input terminals 23a and 23b are spaced apart from each other, the noise generated in the switching element Q1 is generated by the pair of power supply input terminals 23a and 23b. It becomes difficult to superimpose on 23b, and there is an effect that the superposition of noise to the external AC power supply Vs can be suppressed.

  In addition, the noise filter circuit 22 of the lighting circuit 15 can be configured simply, and the lighting circuit component 14 is mounted on the circuit board 13 having a small mounting area by providing the opening 16 with a design margin. In addition, the lighting device 3 can be formed at low cost.

  In the present embodiment, the light emitter 2 is formed using the substrate 6, but the LED bare chip 7 may be formed on the attachment portion 35 of the lid 34 without using the substrate 6. In this case, since the lid 34 is made of metal, an insulating layer is formed on the attachment portion 35, and the LED bare chip 7 and the like are mounted on the insulating layer.

  Moreover, although the light control body 5 was formed so that it might expand as it went to the other end side 5b from the one end side 5a, it should just be formed in cylindrical shapes, such as a substantially cylindrical shape. Moreover, the notch may be provided in the one part.

  The casing 4 may be provided with a dimming pin in addition to the lamp pins 32, 32 in the base portion 28, and the dimming pin is connected to the control circuit 20 of the lighting circuit 15, so that the LED of the light emitter 2 is connected. The bare chip 7 may be formed to be dimmed.

  FIGS. 6 and 7 are lighting fixtures showing Embodiment 2 of the present invention, FIG. 6 is a schematic perspective view, and FIG. 7 is a partially cut schematic front view. 1 and 2 are denoted by the same reference numerals and description thereof is omitted.

  The lighting fixture 53 shown in FIGS. 6 and 7 is a downlight embedded in a ceiling or the like. In FIG. 7, the lighting fixture 53 includes a fixture main body 55 having a socket device 54 as a socket and the lamp device 1 shown in FIG. 1.

  The instrument body 55 is molded by aluminum die casting, has an opening 56 on the lower end side 55a and an annular flange portion 57 protruding outward, closes the upper end side 55b on the upper end side 55b, and is formed in a flat shape. It is formed in a substantially cylindrical box having an upper plate portion 58. Further, on the outer surface 55c of the instrument body 55, reinforcing pieces 59, 60 that also serve as a plurality of heat radiation fins are formed. Furthermore, a pair of attachment springs 61 and 61 are provided on the lower end side 55a of the outer surface 55c to hold the ceiling or the like between the flange portion 57 and the like. And the inner surface 55d of the instrument main body 55 is formed in the reflective surface by white coating, for example.

  A top plate 62 is attached to the outer surface of the upper plate portion 58 with screws 63 or the like. As shown in FIG. 6, the top plate 62 has a terminal block 64 attached to its lower surface 62a. A power supply line (not shown) from an external power supply and a lead wire (not shown) connected to the socket device 54 are connected to the terminal block 64, respectively. A triangular alignment mark 65 for aligning with the mark 48 of the lamp device 1 is provided on the inner surface 55d of the instrument body 55.

  As shown in FIG. 7, a socket device 54 is attached to the inner surface of the upper plate portion 58 with screws (not shown). The socket device 54 is formed with a well-known configuration for mounting the base portion 28 of the housing 4 which is a GX53 type base. The lamp device 1 is mounted on the socket device 54. In the lamp device 1, a protrusion 31 (not shown) of the housing 4 is inserted into an insertion hole (not shown) of the socket device 54, and a pair of lamp pins 32 and 32 (not shown) of the socket device 54 are not shown. After being inserted into the pair of connection holes, it is fixed to the socket device 54 by being rotated, and the pair of lamp pins 32 and 32 are electrically connected to a pair of receptacles (not shown) of the socket device 54.

  When an external power supply is supplied to the terminal block 64, the lighting fixture 53 turns on the LED bare chip 7 (not shown) of the lamp device 1 and emits white light from the light emitter 2 (not shown). Light passes through the protective cover 43. White light is emitted outward from the opening 56 of the instrument body 55 and illuminates the surface to be irradiated, for example, the floor surface.

  Since the lamp device 1 is thin and emits radiated light with a narrow-angle light distribution, the lighting fixture 53 can be formed with a small depth side embedded in a ceiling or the like, and is suitable as a downlight. This has the effect of illuminating the irradiated surface, for example, the floor surface with a narrow angle light distribution.

  DESCRIPTION OF SYMBOLS 1 ... Lamp apparatus, 2 ... Light-emitting body, 3 ... Lighting apparatus, 4 ... Housing | casing, 5 ... Light control body, 7 ... LED bare chip as a semiconductor light-emitting element, 13 ... Circuit board, 15 ... Lighting circuit, 23a, 23b ... Power input terminal, base part ... 28, 29 ... opening part, 31 ... projection part, 32 ... lamp pin as power feeding part, 53 ... lighting fixture, 54 ... socket, 55 ... main body, Q1 ... switching element

Claims (2)

A light emitter having a semiconductor light emitting element;
A circuit board, a switching element that switches at a high frequency, a lighting circuit that is formed to output a DC voltage for lighting the semiconductor light emitting element and mounted on the circuit board; and provided on one surface of the circuit board A pair of power input terminals and a pair of output terminals provided on one surface of the circuit board and electrically connected to the semiconductor light emitting element, the pair of power input terminals being spaced apart from the peripheral edge of the board The switching element is provided on the other surface of the region on the opposite side of the pair of power input terminals from the center line of the circuit board that is parallel to a virtual line connecting the pair of power input terminals, a region of said pair of power input terminals than the pair of output terminals to the center line of the circuit board, as mutual separation dimension is smaller than the distance between the pair of power input terminal A lighting device being eclipsed;
A housing in which a pair of power feeding portions that are electrically connected to a pair of power input terminals of the lighting device are disposed and the lighting device is disposed;
A lamp device comprising: A lamp device according to claim 1;
An instrument body having a socket to which the base of the lamp device is connected;
The lighting fixture characterized by comprising.

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