JP2009054617A - Light-emitting module and light-emitting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light-emitting module and an light-emitting device which can secure water proofness and dust proofness of a mounting board, suppress the occurrence of board deformation, prevent cracks, or the like, of a soldered portion, and to provide a desired light distribution. <P>SOLUTION: The light-emitting module 1 has a case body 3; a board 20 on the surface of which a plurality of light sources 4 are arranged, the board 20 sliding in a board surface direction to be stored and supported by the case body 30; reinforcing means 12 which are provided on the inner wall of the case body 3 and arranged along the surface of the board 20; and a filler 30 which is made of resin and is filled into the case body 3 including the board 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a light emitting module and a light emitting device using a light source such as an LED.

In light emitting modules using light sources such as LEDs, it is necessary to take measures for waterproofing and dustproofing, particularly when used outdoors. For this reason, with regard to lighting equipment using LEDs, a printed circuit board on which LEDs are arrayed and mounted is housed and fixed in a housing, transparent resin is filled in the housing, and the entire LED and electronic components are resin molded to form the lighting equipment. Has been proposed (see Patent Document 1).
JP 2003-303504 A

  However, in the one shown in Patent Document 1, the printed circuit board is warped and deformed by heat, that is, heat in the process of filling and curing the resin, heat by the mounting component during use of the lighting fixture, and the like, Cracks occur in the solder portion, and the deformation of the printed circuit board disturbs the light emission direction of the LED mounted on the printed circuit board, which makes it difficult to obtain a desired light distribution.

  Therefore, the present invention is intended to solve the above inconveniences, and can secure the waterproofness and dustproofness of the mounting board, suppress the occurrence of deformation of the board, prevent cracking of the solder part, and the like. It is an object of the present invention to provide a light emitting module and a light emitting device capable of obtaining the above light distribution.

The light emitting module according to claim 1 has a case main body, a substrate surface on which a plurality of light sources are disposed, a substrate that is slidably housed and supported on the case main body, and an inner wall of the case main body. And reinforcing means disposed along the surface of the substrate, and a resin filler filled with the substrate in the case main body.

  In the present invention and the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified. A case main body can be comprised by a rectangular parallelepiped, a cylinder, a triangular prism, etc., and is not limited to the shape. The light source is preferably composed of an LED, but may be composed of a solid light emitting element such as an organic EL, a subminiature lamp, or the like. The reinforcing means only needs to exhibit a function of suppressing the occurrence of deformation of the substrate, and is not limited to its shape. Further, the reinforcing means may be disposed along the front surface or the back surface of the substrate, or may be disposed on both surfaces. Further, the support of the substrate to the case main body may specially constitute a support part or may be shared by a reinforcing means. As the filler, a silicone resin, a urethane resin, a polyester resin, or the like can be appropriately selected.

  The light-emitting module according to claim 2 has a case main body and a substrate surface on which a plurality of light sources are arranged, a first substrate that is slidably housed and supported by the case main body in the substrate surface direction, and a light source A board surface on which a lighting circuit component for lighting is mounted, a second board that is slidably housed and supported on the case body, and is provided on the inner wall of the case body. Along the front and back surfaces, near the both ends and the center of the substrate in the longitudinal direction, reinforcing means disposed so as to sandwich the substrate, and provided on the inner wall of the case body, along the upper surface of the second substrate It is characterized by comprising reinforcing means to be disposed and a resin filler filled in the case body including the two substrates. The present invention is provided with two substrates, a first substrate on which a light source is disposed and a second substrate on which a lighting circuit component is mounted. For example, the first substrate and the second substrate are provided. The provision of the third substrate in addition to the substrate is not excluded.

  The light emitting module according to claim 3 is the light emitting module according to claim 2, wherein the reinforcing means disposed on the upper surface of the second substrate has an allowable dimension in a direction perpendicular to the surface of the substrate. It is characterized by being tapered.

  According to a fourth aspect of the present invention, there is provided a light emitting device including the device main body and the light emitting module according to any one of the first to third aspects incorporated in the device main body. The light emitting device of the present invention is a concept including a display device and a lighting fixture that illuminates a so-called space.

  The present invention can secure the waterproofness and dustproofness of the mounting substrate, suppress the occurrence of deformation of the substrate, prevent the solder portion from cracking, and obtain desired light distribution.

  Hereinafter, a first embodiment of a light emitting module of the present invention will be described in detail with reference to FIGS. First, FIG. 1 is a perspective view showing a light emitting module. The light emitting module 1 is composed of a box-shaped synthetic resin case main body 3 having a light emitting surface 2 as an opening, and a plurality of LEDs 4... Serving as a light source disposed in the opening of the main body 3. Has been. The LED 4 is a so-called bullet-type white LED, and ten LEDs 4... Are linearly arranged at predetermined intervals. Moreover, these LED4 ... is covered with the protective cap made from translucent silicone resin. The main body 3 incorporates a drive circuit for the LEDs 4..., A wiring board, and the like, and a power cord 5 is led out from the main body 3.

  Next, FIG. 2 is an exploded perspective view showing the light emitting module 1. The case body 3 includes a base member 6 having an L-shaped cross section and a lid member 7 combined with the base member 6. The base member 6 includes a bottom plate 6a, a back plate 6b, and a side plate 6c. In the illustration of the base member 6, the bottom inner wall 8 is formed with support portions 9 that protrude from the bottom inner wall 8 in the longitudinal direction and the width direction, respectively. Further, two semicircular columnar reinforcing means 11 are formed extending upward from the bottom inner wall 8 to the rear inner wall 10 and having an upper end surface extending in the width direction. The back inner wall 10 is formed with three first reinforcing means 12... At the upper stage and two second reinforcing means 13, 13 at the lower stage. The first reinforcing means 12... Has a columnar shape, extends in the width direction from the back inner wall 10, and has a concave groove 12 a at the tip. Subsequently, the second reinforcing means 13, 13 has a conical column shape, and extends from the back inner wall 10 in a taper shape that tapers in the width direction. Notches 6aa and 6cc with which the lid member 7 engages are formed on the end surfaces of the bottom plate 6a and the side plate 6c of the base member 6.

  Next, the mounting substrate that is housed and supported in the case body 3 will be described. The board is, for example, a printed board, and two sheets of a first printed board 20 and a second printed board 21 are provided. The first printed circuit board 20 is a glass epoxy board and has an elongated rectangular shape. Ten bullet-type LEDs 4... Are mounted on the surface of the substrate 20. Moreover, a plurality of through holes 20a... Are formed. Further, the second printed circuit board 21 is a glass epoxy board, like the first printed circuit board 20, and has an elongated rectangular shape. On the surface of the substrate 21, lighting circuit components 21 c such as rectifying elements, resistance elements, varistors, and fuses for lighting the LEDs 4. Further, a plurality of through holes 21a... And notches 21b corresponding to the semicircular columnar reinforcing means 11, 11 of the base member 6 are formed.

  The lid member 7 constitutes the front wall of the case body 3, and projections 7 aa that engage with the notches 6 aa and 6 cc of the base body 6 are formed at the side end and the bottom end. Note that, on the inner surface of the lid member 7, a support portion for a printed circuit board, which will be described in detail later, and the like are formed.

  With the above configuration, an outline of the assembly method will be described with reference to FIGS. FIG. 3 is a perspective view showing an installed state of the printed circuit board. In the figure, components mounted on the printed circuit board are omitted. First, the first printed board 20 and the second printed board 21 are slid from the front side of the base member 6 toward the board surface and set on the base member 6. In this set state, the first printed circuit board 20 is placed and supported on the upper end surface of the semicircular columnar reinforcing means 11 and 11 on the back side, and the front side is in contact with the first reinforcing means 12. It has become a state. That is, the reinforcing means 11, 11 and 12... Sandwich the substrate 20 along the width direction of the front and back surfaces of the printed circuit board 20 and in the vicinity of both ends and the center of the substrate 20 in the longitudinal direction. It is arranged. Here, the surface side of the printed circuit board 20 is not necessarily in contact with the reinforcing means 12..., And a slight gap is allowed. Subsequently, the second printed circuit board 21 is mounted and supported on the back surface side by the support portion 9, the notch 21 b is fitted in the semicircular reinforcing means 11, 11, and the front surface side is the second reinforcing means 13. , 13 in contact with the base of the conical column shape, and the movement is restricted. That is, the reinforcing means 13 are arranged in a taper shape along the width direction of the surface of the printed board 21. Then, the protrusion 7aa of the lid member 7 is engaged with the cutouts 6aa and 6cc of the base portion 6, and the lid member 7 is combined with the base portion 6. In a state where the first printed circuit board 20 and the second printed circuit board 21 are accommodated in the case body 3, a filler is filled so as to cover both the printed circuit boards 20 and 21.

  Next, a more specific description will be given with reference to FIGS. 4 is a front view of the light emitting module 1 with the cover member 7 removed from the case body 3, FIG. 5 is a cross-sectional view taken along line AA in FIG. 4, and FIG. 6 is a line BB in FIG. FIG. The same parts as those in FIGS. 1 to 3 described above are denoted by the same reference numerals, and redundant description thereof is omitted. First, in FIG. 4, the first printed circuit board 20 and the second printed circuit board 21 are housed and supported in the case body 3. Reinforcing means 11, 11, first reinforcing means 12... And second reinforcing means 13, 13 are arranged along the surfaces of the printed circuit boards 20, 21, respectively. The filling material 30 made of silicone resin is filled so as to cover the first printed circuit board 20 and the second printed circuit board 21 with the heads of the LEDs 4...

  Next, a description will be given with reference to FIGS. In the figure, details of the mounted components of the printed circuit boards 20 and 21 are omitted. First, on the inner surface of the lid member 7, a fitting protrusion 7 b that fits into the concave groove 12 a of the first reinforcing means 12, a mountain-shaped protrusion 7 c that supports the back surface of the first printed circuit board 20, and a second A concave groove 7d into which the tips of the reinforcing means 13, 13 are fitted, and a support portion 7e for supporting the second printed circuit board 21 are formed. The first printed circuit board 20 and the second printed circuit board 21 are housed and supported and filled with the filler 30.

  Here, since the first printed circuit board 20 is mounted with the LEDs 4... That are light sources, the printed circuit board 20 is inclined and attached in order to obtain a light distribution with strong directivity. It is necessary to avoid the printed circuit board 20 from warping due to heat. Therefore, the first printed circuit board 20 must be attached with a predetermined accuracy in the dimensional relationship between the semicircular reinforcing means 11, 11, the first reinforcing means 12, and the lid member 7. On the other hand, the second printed circuit board 21 must avoid warping due to heat, but since the light source is not mounted, it can be said that the mounting accuracy as high as the first printed circuit board 20 is not required. . Therefore, when the lid member 7 is combined with the base member 6, first, priority is given to fitting the fitting protrusion 7b into the concave groove 12a of the first reinforcing means 12 related to the first printed circuit board 20. Then, the second printed circuit board 21 is assembled so as to fit the support portion 7e of the lid member 7. In this case, since the second reinforcing means 13 is formed in a tapered shape, the second reinforcing means 13 is disposed with an allowable dimension in a direction orthogonal to the surface of the second printed circuit board 21. . That is, the second printed circuit board 21 can be combined with an allowable dimension, so-called play, in the direction indicated by the arrow A (FIG. 6) when the lid member 7 is combined. Therefore, even if the mounting dimension of the first printed circuit board 20 is strictly set in relation to the lid member 7, the second printed circuit board 21 is mounted within the allowable dimension by the arrow A even when the second printed circuit board 21 is mounted. It can be moved in the direction to be dimensioned with the support portion 7e of the lid member 7, that is, it can absorb dimensional errors and the like, and the combination of the lid member 7 to the base member 6 can be facilitated. It becomes. In addition, what is necessary is just to select and design the taper gradient of the 2nd reinforcement means 13 and 13 suitably.

  Next, the filler 30 will be described. The filler 30 is made of a silicone resin and has insulating properties and thermal conductivity. In this filling method of the filling material 30, first, a liquid filling material 30 of 100 ° C. or more is injected from the upper surface opening of the case body 3. The filler 30 injected from above passes through the through hole 20a formed in the first printed circuit board 20, reaches the second printed circuit board 21, and further passes through the through hole 21a of the second printed circuit board 21. Then, it flows down to the lower side of the printed circuit board 21. The filling amount of the filler 30 is set to a level at which the first printed circuit board 20 and the second printed circuit board 21 are covered and the heads of the LEDs 4. After the filling of the filling material 30 is completed, the filling material 30 is left for a required time until it is cured and stabilized.

  In the filling process of the filler 30 described above, the printed boards 20 and 21 receive the heat of the filler 30 and may be warped or deformed. Since the reinforcing means 11 and 11 and the first reinforcing means 12... Are disposed along the front and back surfaces, warping and deformation of the substrate 20 can be suppressed. In addition, since the second reinforcing means 13 and 13 are disposed along the surface of the second printed circuit board 21, warping and deformation of the circuit board 20 can be suppressed. During use of the light emitting module, heat is generated from the mounted components. In this case as well, the printed circuit boards 20 and 21 receive the heat and may be warped or deformed. In addition, the warping and deformation of the substrates 20 and 21 can be suppressed by the reinforcing means 11, 11, 12,.

  As described above, according to the present embodiment, the case main body is filled with the resin filler, so that the waterproofness and dustproofness of the printed circuit board can be secured, and the occurrence of deformation of the printed circuit board is suppressed, and the solder portion Cracks and the like, and a desired light distribution can be obtained. Further, since the second reinforcing means is disposed with an allowable dimension in a direction orthogonal to the surface of the second printed circuit board, it is possible to facilitate the combination of the lid member to the base member. It becomes.

  Next, a second embodiment of the present invention will be described with reference to FIG. 7A and 7B show a light emitting module, FIG. 7A is a side view, and FIG. 7B is a front view showing a case body with a cover member removed. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent part, and the duplicate description is abbreviate | omitted. In the present embodiment, the surface of the filler 30 is formed so as to be inclined as indicated by a broken line in the drawing. A circular drainage through hole 6d is formed in the side plate 6c at the inclined end. Therefore, when the light emitting module 1 is used outdoors, rainwater or the like can flow along the slope without being collected in the opening of the case body 3 and can be discharged from the drain through hole 6d.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, rainwater and the like can be discharged from the case main body without causing rainwater or the like to stagnate in the case main body, thereby further improving waterproofness. The effect can be expected.

  Furthermore, a third embodiment of the present invention will be described. Although illustration is omitted, the light emitting module of each of the above embodiments can be configured as a light emitting device built in the apparatus main body. For example, the present invention can be applied to various display devices such as garden lamps, nameplate lamps, and signboard lamps used outdoors, and lighting fixtures such as foot lamps installed in corridors and stairs used indoors. Therefore, according to such a light emitting device, it is possible to provide a light emitting device having the effects of the above embodiments.

  In each of the above embodiments, the LED as the light source is not limited to using a white light emitting LED. For example, blue, green, and red light emitting colors may be used. May be used. Further, the printed circuit board may be a double-sided mounting type in which LEDs are mounted on the front surface side and lighting circuit components are mounted on the back surface side.

1 is a perspective view showing a first embodiment of a light emitting module of the present invention. It is a perspective view which decomposes | disassembles and shows the case main body of the 1st Embodiment. It is a perspective view which shows the installation state of the printed circuit board of the 1st embodiment. It is a front view which removes and shows the cover member of the main body case of the 1st embodiment. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is the front view which removes and shows the side view of the said 2nd Embodiment, and the cover member of a main body case.

Explanation of symbols

1 Light Emitting Module 3 Case Body 4 Light Source (LED)
11, 12, 13 Reinforcing means 20, 21 Printed circuit board 30 Filler

Claims (4)

With the case body;
A substrate having a substrate surface on which a plurality of light sources are disposed, and being stored and supported by sliding in the substrate surface direction on the case body;
Reinforcing means provided on the inner wall of the case body and disposed along the surface of the substrate;
A resin filler filled with the substrate in the case body;
A light emitting module comprising: With the case body;
A first substrate having a substrate surface on which a plurality of light sources are disposed, and being housed and supported on the case body by sliding in the substrate surface direction;
A second board having a board surface on which a lighting circuit component for lighting a light source is mounted, and being housed and supported by sliding in the board surface direction on the case body;
Reinforcing means provided on the inner wall of the case main body and disposed along both the front and back surfaces of the first substrate so as to sandwich the substrate between both ends and the center of the substrate in the longitudinal direction;
Reinforcing means provided on the inner wall of the case body and disposed along the upper surface of the second substrate;
A resin filler filled in the case body including the two substrates;
A light emitting module comprising:   The light emitting device according to claim 2, wherein the reinforcing means disposed on the upper surface of the second substrate is configured to have a tapered shape so as to have an allowable dimension in a direction orthogonal to the surface of the substrate. module. The device body;
The light emitting module according to claim 1, which is incorporated in the apparatus main body;
A light emitting device comprising:

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