JP2020009788A - Light source unit and lighting device - Google Patents

Abstract

To support a substrate reliably with a space for arranging a lighting circuit of the substrate of a light source made wide.SOLUTION: A light source unit comprises: a longitudinal substrate 50 that has a light source substrate part 51 on which a light emitting element is arranged, and a power supply substrate part 52 on which a lighting circuit for lighting the light emitting element is arranged, wherein the power supply substrate part and the light source substrate unit 51 are integrally molded adjacently to each other in a longitudinal direction, and in which the dimension of the power supply substrate part 52 in a short direction is larger than the dimension of the light source substrate part; and a longitudinal support 40 on which the substrate 50 is supported, and of which the dimension in the short direction is larger than the dimension of the power supply substrate part 52.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a light source unit and a lighting device.

  There is a long LED lamp in which an LED and a lighting circuit component such as a capacitor are mounted on the same substrate (for example, see Patent Document 1).

JP 2011-3213 A

  In a conventional LED illumination lamp, a pair of recesses is formed along the lengthwise direction on the inner peripheral surface of a cylindrical pipe member, and the pair of recesses holds the substrate over the entire lengthwise direction. . Since both ends in the short direction of the board are fitted into the recesses over the entire length in the long direction, there is a problem that the lighting circuit component can be mounted only in the center in the short direction of the board. If the recess is made smaller, the space for mounting the lighting circuit component is increased by that much, but the board cannot be held securely, and the reliability of the LED lighting may be impaired.

  An object of the present invention is to securely support a substrate of a light source unit while securing a large space for disposing a lighting circuit of the substrate.

The light source unit according to one embodiment of the present invention includes:
A light source substrate portion on which a light emitting element is disposed, and a power supply substrate portion on which a lighting circuit for lighting the light emitting element is disposed, wherein the power supply substrate portion and the light source substrate portion are integrally adjacent to each other in a longitudinal direction. Molded, a longitudinal substrate in which the size of the power supply substrate in the short direction is larger than the size of the light source substrate,
A support for supporting the substrate, the support having a longitudinal shape having a dimension in a short direction larger than a dimension of the power supply board portion.

  In the present invention, the width of the portion where the lighting circuit of the substrate is disposed is larger than the width of the portion where the light emitting element of the substrate is disposed, and while taking a large space for disposing the lighting circuit of the substrate, The substrate can be reliably supported.

FIG. 2 is a perspective view of the lighting device according to Embodiment 1. FIG. 2 is a perspective view of the light source unit according to Embodiment 1. FIG. 2 is a cross-sectional view of the light source unit according to the first embodiment taken along line AA. FIG. 2 is a partial cross-sectional view of the light source unit according to Embodiment 1. FIG. 2 is a perspective view of a support and a substrate of the light source unit according to Embodiment 1. FIG. 3 is an exploded perspective view of a support and a substrate of the light source unit according to the first embodiment. FIG. 9 is a perspective view of a support and a substrate of the light source unit according to Embodiment 2. FIG. 9 is an exploded perspective view of a support and a substrate of the light source unit according to Embodiment 2.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals. In the description of the embodiments, description of the same or corresponding portions will be omitted or simplified as appropriate. In the description of the embodiments, arrangements and directions such as “up”, “down”, “left”, “right”, “front”, “back”, “front”, and “back” are used for convenience of description. , Etc., but do not limit the arrangement, orientation, and the like of the devices, instruments, parts, and the like. With respect to the configuration of the device, the tool, the component, and the like, the material, shape, size, and the like can be appropriately changed within the scope of the present invention.

Embodiment 1 FIG.
The configuration of the device according to the present embodiment and the effects of the present embodiment will be described in order.

*** Configuration description ***
With reference to FIG. 1, a configuration of a lighting device 10 which is a device according to the present embodiment will be described.

  The lighting device 10 includes a light source unit 11 and a lighting fixture 12 to which the light source unit 11 is detachably mounted. The lighting device 10 is attached to a ceiling via a fixture, and illuminates the floor surface and the indoor space when the light source unit 11 is turned on. Note that the lighting device 10 may be installed on a table to illuminate the table, may be mounted on a wall via a fixture, or may be used in other places or other applications. It may be something.

  The lighting fixture 12 includes a fixture main body 13 and a pair of sockets 14.

  Although not shown, a power supply box is housed in the appliance body 13. The power supply box houses a power supply device that supplies power to the light source unit 11 via the socket 22 when the switch is turned on, and stops supplying power when the switch is turned off.

  The sockets 14 are attached to both longitudinal ends of the instrument body 13. The socket 14 is electrically connected to the light source unit 11. The power supply socket 14 also has a role of holding the light source unit 11.

  The configuration of the light source unit 11 will be described with reference to FIGS. 2, 3, 4, 5, and 6.

  Here, FIG. 3 is a diagram showing a cross section of the light source unit 11 shown in FIG. 2 taken along the line AA. In FIG. 3, the base 30 is omitted. FIG. 4 is a diagram showing a part of a longitudinal section of the light source unit 11 shown in FIG. 2 cut along the longitudinal direction.

  The light source unit 11 is a straight tube lamp in the present embodiment, but may be a lamp of another shape.

  As shown in FIGS. 2, 3, and 4, the light source unit 11 includes a long cover 20, a pair of bases 30, a long support 40, and a long substrate 50.

The cover 20 houses the support 40 and the substrate 50. The cover 20 is cylindrical. The cover 20 is formed of an extrudable resin material. As the resin material, any material having a light-transmitting property can be used. In this embodiment, polycarbonate (PC) is used. The cover 20 may have functions such as diffusion, reflection, and color rendering according to the design specifications of the light source unit 11. In the present embodiment, cover 20 is formed of polycarbonate mixed with a diffusing material, and is a milky white tube that diffuses and transmits light. The material of the cover 20 is not limited to a resin material, but may be a glass material. In addition, since it is sufficient that at least a part of the cover 20 has a light-emitting area, the light-emitting side material may be a light-transmitting resin, and the material on the side opposite to the light-emitting side may be a white high-reflection resin.

  The bases 30 are attached to both ends of the cover 20 in the longitudinal direction. The base 30 has a pair of terminals 31 for power supply and a housing 32 in which the terminals 31 are embedded. The terminal 31 and the housing 32 may be integrally formed by insert molding or the like, or may be integrally formed by, for example, press-fitting and fixing the terminal 31 into a terminal mounting hole (not shown) provided in the housing 32 in advance. . In the present embodiment, the base 30 is a G13 type base, but may be another type of base such as a G5 type base, a GX16t-5 type base. The housing 32 is formed of an insulating resin material. The housing 32 is provided with a screw hole 33. Although not shown, it is assumed that characters or graphics indicating the type of the luminaire 12 to which the light source unit 11 can be attached are written on the housing 32.

  The support 40 may not have a heat radiation function, but in the present embodiment, is a heat sink, and conducts operating heat generated from a light emitting element 61 and lighting circuit components 62 and 63 described later to the cover 20. Dissipate outside. The support 40 has a rigidity for supporting the light source unit 11 in the longitudinal direction, and preferably has a small linear expansion coefficient. The support 40 is formed of a metal material that can be extruded. Aluminum, iron, or the like can be used as the metal material of the support 40. In addition, the material of the support body 40 is not limited to a metal material, and may be a high heat conductive resin.

  As shown in FIGS. 5 and 6, the substrate 50 has a light source substrate 51 and a power supply substrate 52. A light emitting element 61 is arranged on the light source substrate 51. A lighting circuit for lighting the light emitting element 61 is arranged on the power supply board unit 52. Specifically, lighting circuit components 62 and 63, which are components forming a lighting circuit, are arranged on the power supply board unit 52.

  The light emitting element 61 is lit by being supplied with power from the lighting circuit. The light emitting element 61 is an LED in the present embodiment. As the LED, a pseudo white LED packaged by disposing a phosphor for converting the wavelength of blue light to yellow light on an LED chip that emits blue light having a wavelength of about 440 nm (nanometers) to 480 nm can be used. The light emitting element 61 is not limited to an LED, but may be another type of solid state light emitting element such as an organic EL or a laser diode. Further, the number of the light emitting elements 61 is not limited to a plurality, and may be one.

  As shown in FIG. 4, in the present embodiment, at least one end of the substrate 50 in the longitudinal direction is a power supply substrate portion 52, and the lighting circuit is electrically connected to the terminal 31 of the base 30. Specifically, a lighting circuit including a lighting circuit component 62 mounted on the power supply board 52 is electrically connected to the terminal 31 by the electric wire 34. The surface of the substrate 50 is covered with a highly reflective resist layer having a high reflectance (not shown). The high-reflection resist layer is, for example, a silicone-based high-reflection resist layer using a silicone-based resin material for a base material. The silicone-based high-reflection resist layer covers a conductive layer laid on the surface of the substrate 50 to form a conductive path for generating and supplying power, and is exposed at least in a light emitting direction of the light emitting element 61. The silicone-based high-reflection resist layer is laid on the entire mounting surface of the substrate 50 except for the portion where the light emitting element 61 is bonded.

As shown in FIGS. 5 and 6, in the present embodiment, both ends of the substrate 50 in the longitudinal direction are power supply substrate portions 52, and the lighting circuits are dispersedly arranged at both ends in the longitudinal direction. Specifically, a lighting circuit component 62, which is a part of a component of the lighting circuit, is mounted on the power supply board unit 52 at one end in the longitudinal direction of the substrate 50, and a lighting component, which is the remaining component of the lighting circuit, is mounted. The circuit component 63 is mounted on the power supply board 52 at the other end of the board 50 in the longitudinal direction. In the present embodiment, among the components constituting the lighting circuit, the lighting circuit component 62 is the primary circuit component and the lighting circuit component 63 is the secondary circuit component. It can be arbitrarily determined whether to dispose it on the substrate part 52. In each power supply board section 52, the lighting circuit components 62 and 63 may be mounted on only one side or may be mounted on both sides. That is, the lighting circuits may be arranged on only one side of the power supply board section 52 or may be arranged separately on both sides of the power supply board section 52.

  AC power supplied from an external power supply such as a commercial power supply is input from a power supply device built in the lighting fixture 102 to a lighting circuit arranged on the power supply board unit 52 via the socket 14, the terminal 31, and the electric wire 34. You. The input AC power is converted into DC power by the lighting circuit. The DC power output from the lighting circuit is input to the light emitting element 61 via a circuit pattern or the like formed on the substrate 50 and used as lighting power.

  As shown in FIGS. 5 and 6, the power supply board 52 and the light source board 51 of the board 50 are integrally formed adjacent to each other in the longitudinal direction of the board 50. That is, the power supply board unit 52 and the light source board unit 51 are formed on the same board 50 so as to be continuous with each other. The dimensions D2 and D3 of the power supply board section 52 in the short direction of the board 50 are larger than the dimension D1 of the light source board section 51 in the short direction of the board 50. Although the width D2 of the power supply board 52 at one end in the longitudinal direction of the substrate 50 and the width D3 of the power supply board 52 at the other end in the longitudinal direction of the substrate 50 are the same in the present embodiment, As long as it is larger than the width D1 of the light source substrate 51, the dimensions may be different from each other.

  As shown in FIGS. 3 and 4, the support body 40 includes one substrate support part 41, one pair of side wall parts 42, one pair of flange parts 43, one pair of other side wall parts 44, It has one bottom wall part 45 and one screwing part 46.

  A groove 47 extending in the longitudinal direction of the support 40 is provided by the substrate support 41 and the side wall 42. The support 40 supports the substrate 50 by fitting the light source substrate 51 of the substrate 50 into the groove 47. The dimension D4 of the groove 47 in the lateral direction of the support 40 is equal to or larger than the dimension D1 of the light source substrate 51 in the lateral direction of the substrate 50. It is desirable that the dimension D4 of the groove 47 in the short direction of the support 40 be smaller than the dimensions D2 and D3 of the power supply board part 52 in the short direction of the substrate 50. That is, it is desirable that the width D4 of the groove 47 be equal to or larger than the width D1 of the light source substrate 51 and smaller than the widths D2 and D3 of the power supply substrate 52. The length of the groove 47 may be shorter than the length of the light source substrate 51, but is desirably the same as the length of the light source substrate 51 in order to increase the contact area between the support 40 and the substrate 50 as much as possible.

  The light source substrate 51 of the substrate 50 is attached and fixed to the substrate support 41 using an adhesive 49 such as an adhesive or a double-sided tape. Note that the light source substrate 51 of the substrate 50 may be fixed to the substrate support 41 using another method such as screwing.

  The side wall portions 42 rise from both sides of the substrate support portion 41. The side wall part 42 has a positioning function when the light source substrate part 51 of the substrate 50 is installed on the substrate support part 41.

  The flange 43 extends outward from the side wall 42 perpendicularly to the direction in which the side wall 42 rises, and approaches or contacts the inner peripheral surface of the cover 20.

  The other side wall 44 extends from the side wall 42 to the side opposite to the side where the flange 43 is located.

The bottom wall portion 45 extends in an arc shape along the inner peripheral surface of the cover 20 while approaching or in contact with the inner peripheral surface of the cover 20, and connects the other side wall portions 44 to each other. An adhesive or a heat conductive member such as a heat conductive grease or a heat conductive sheet may be provided between the arc-shaped surface of the bottom wall portion 45 and the inner peripheral surface of the cover 20. Whether to dispose an adhesive or a heat conductive member may be appropriately determined based on the heat-resistant temperature, life, strength, and the like of the light-emitting element 61 used.

  At least the flange 43 and the bottom wall 45 serve as a path for dissipating the operating heat of the light emitting element 61 to the outside of the cover 20.

  At least on the upper surface of the flange portion 43, a resin material having a high reflectance is laid in a thin film shape (not shown), and the light emitted from the light emitting element 61 is reflected by the cover 20 to reflect the light inside the light source unit 11. Is reflected to the irradiation side of the light source unit 11. The resin material having a high reflectance is, for example, a silicone resin material.

  A screw portion 46 is provided on the bottom wall portion 45. The screwing portion 46 is a structure for screwing the screw 35 inserted from the outside of the light source unit 11 into the axial direction of the inner peripheral surface of the cover 20 through the screw hole 33 of the base 30. The screw portion 46 has a screw hole 48 into which the screw 35 is screwed. That is, the screw hole 48 is provided in the bottom wall portion 45 along the axial direction of the inner peripheral surface of the cover 20. The screw 35 is a fastening member for fastening the support 40 and the base 30. The screw hole 48 is a hole into which the fastening member is inserted. By screwing the screw 35 into the screw hole 48, the base 30 is fixed to the support 40. The base 30 may be screwed by another method, or may be fixed by a method other than screwing.

*** Explanation of effect of embodiment ***
In the present embodiment, the width D2, D3 of the portion of the substrate 50 where the lighting circuit is arranged is larger than the width D1 of the portion of the substrate 50 where the light emitting element 61 is arranged. The substrate 50 is supported by fitting the portion where is disposed into the groove 47 of the support body 40. Therefore, according to the present embodiment, it is possible to reliably support the substrate 50 while securing a large space for disposing the lighting circuit of the substrate 50. Therefore, the reliability of the light source unit 11 is improved.

  In the present embodiment, the power supply circuit for lighting the LED and the LED are mounted on one long circuit board, and the power supply circuit is distributed to both sides of the circuit board, thereby effectively utilizing the board space. Becomes possible.

  In the present embodiment, since the width of both ends of one long circuit board is wider than the width of the central part, the metal heat sink, which is a rigid main structure of one circuit board and a straight tube LED lamp, is used. Positioning at the time of joining is facilitated, and assemblability is improved.

  In the present embodiment, since the power supply circuit and the LED are arranged on the same circuit board, the connection by soldering between the circuit boards is unnecessary, the environment is excellent, and the number of components can be reduced. Therefore, a lamp excellent in cost can be provided.

  There are various types of fluorescent lamp lighting fixtures such as a glow type, a rapid starter type, and an inverter type. In the present embodiment, the lamp base unit determines which lighting fixture the straight tube LED lamp can support. By displaying on, safety during use can be improved.

  In the present embodiment, the surface of the substrate 50 is covered with a highly reflective resist layer having a high reflectance, and a resin material having a high reflectance is laid in a thin film on the upper surface of the flange 43. Therefore, light emitted from the light emitting element 61 can be extracted with high efficiency as irradiation light of the light source unit 11.

*** Other configuration ***
In the present embodiment, the shape of the substrate 50 is symmetrical in the longitudinal direction. However, in order to regulate the direction of the substrate 50 when the light source unit 11 is assembled, the longitudinal end of the substrate 50 is formed in a different shape in one direction. It may be made to be assembled only. Alternatively, the direction of the substrate 50 when the light source unit 11 is assembled may be regulated by displaying a mark or color indicating the direction on the surface of the substrate 50 by silk printing or the like. Note that an aperture indicating the direction of the substrate 50 may be formed in the high-reflection resist instead of the silk printing, so that the silk printing step can be omitted. Further, the manufacturing apparatus may be able to recognize the orientation of the substrate 50 by using a method such as a digital watermark.

  In the present embodiment, the light source unit 11 is of a type in which the substrate 50 and the heat sink are inserted into the cover 20 which is a cylindrical outer shell. A structure having a circular cross section as a whole may be adopted by combining with a circular heat sink.

  A film may be attached so as to enclose the base 30, and a warning sign may be provided on the surface of the film.

Embodiment 2 FIG.
The present embodiment will be described mainly on the differences from the first embodiment.

  In the present embodiment, the shapes of the support 40 and the substrate 50 of the light source unit 11 are different from those of the first embodiment.

  The configuration of the light source unit 11 will be described with reference to FIGS.

  The substrate 50 has another light source substrate 53 in addition to the light source substrate 51 and the power supply substrate 52. Another light emitting element 64 is disposed on the other light source substrate unit 53.

  The other light emitting elements 64 are lit by being supplied with power from the lighting circuit. The other light emitting element 64 is an LED in this embodiment, like the light emitting element 61, but may be another type of solid state light emitting element such as an organic EL or a laser diode. The number of the other light emitting elements 64 is not limited to a plurality, and may be one.

  As shown in FIGS. 7 and 8, the power supply board part 52, the light source board part 51, and the other light source board parts 53 of the board 50 are integrally formed in order in the longitudinal direction of the board 50. That is, the power supply board part 52, the light source board part 51, and the other light source board parts 53 are formed on the same board 50 so as to be consecutive in order. The dimensions D2 and D3 of the power supply board section 52 in the short direction of the board 50 are larger than the dimension D1 of the light source board section 51 in the short direction of the board 50, as in the first embodiment. The dimension D5 of the other light source substrate unit 53 in the short direction of the substrate 50 is larger than the dimension D1 of the light source substrate unit 51 in the short direction of the substrate 50. The width D2 of the power supply board part 52 at one end in the longitudinal direction of the board 50, the width D3 of the power supply board part 52 at the other end of the board 50 in the longitudinal direction, and the width D5 of the other light source board parts 53 are: Although the dimensions are the same in the present embodiment, the dimensions may be different as long as they are larger than the width D1 of the light source substrate 51.

  In the present embodiment, the other light source substrate 53 of the substrate 50 does not fit into the groove 47 of the support 40, and thus a part of the pair of side walls 42 forming the groove 47 of the support 40 is notched. Has been. The support 40 supports the substrate 50 by fitting the light source substrate 51 of the substrate 50 into the groove 47 and fitting another light source substrate 53 of the substrate 50 to the notch 71 of the side wall 42.

  The numbers of the light source substrate 51, the power supply substrate 52, and the other light source substrate 53 of the substrate 50 can be appropriately changed. As an example, the substrate 50 may include three light source substrate units 51, two power supply substrate units 52, and two other light source substrate units 53. In this case, along the longitudinal direction of the board 50, the first power supply board section 52, the first light source board section 51, the first other light source board section 53, the second light source board section 51, the second other , The third light source substrate 51, and the second power supply substrate 52 can be arranged in order.

  Further, the other light source substrate unit 53 shown in FIGS. 7 and 8 may be replaced with a power supply substrate unit 52.

  According to the present embodiment, the positioning when joining one circuit board and the metal heat sink, which is the rigid main structure of the straight tube LED lamp, is further facilitated, and assemblability is further improved.

  Although the embodiments of the present invention have been described above, some of these embodiments may be implemented in combination. Alternatively, any one or some of these embodiments may be partially implemented. Specifically, in the description of these embodiments, only one of the units described as “units” may be employed, or some arbitrary combination may be employed. Note that the present invention is not limited to these embodiments, and various modifications can be made as necessary.

  Reference Signs List 10 lighting device, 11 light source unit, 12 lighting fixture, 13 fixture main body, 14 socket, 20 cover, 30 base, 31 terminal, 32 housing, 33 screw hole, 34 electric wire, 35 screw, 40 support, 41 substrate support , 42 side wall portion, 43 flange portion, 44 other side wall portion, 45 bottom wall portion, 46 screwing portion, 47 groove, 48 screw hole, 49 adhesive member, 50 substrate, 51 light source substrate portion, 52 power supply substrate portion, 53 Other light source board part, 61 light emitting element, 62 lighting circuit part, 63 lighting circuit part, 64 other light emitting element, 71 cutout.

Claims (6)

A light source substrate portion on which a light emitting element is disposed, and a power supply substrate portion on which a lighting circuit for lighting the light emitting element is disposed, wherein the power supply substrate portion and the light source substrate portion are integrally adjacent to each other in a longitudinal direction. Molded, a longitudinal substrate in which the size of the power supply substrate in the short direction is larger than the size of the light source substrate,
A light source unit comprising: a support on which the substrate is supported; and a longitudinal support having a dimension in a lateral direction larger than a dimension of the power supply board unit. The power supply board unit,
The light source unit according to claim 1, wherein the light source unit is arranged on a side of an end in a longitudinal direction of the substrate. The light source board unit includes:
The light source unit according to claim 1, wherein the light source unit is arranged on a side of a central portion in a longitudinal direction of the substrate. At least a part of the lighting circuit,
The light source unit according to claim 1, wherein the light source unit is disposed closer to an end in the longitudinal direction of the substrate than the light emitting element. At least a part of the lighting circuit,
The light source unit according to claim 1, wherein the light source unit is disposed closer to an end of the substrate in a lateral direction than the light emitting element.   An illumination device comprising the light source unit according to claim 1.