JP6639144B2 - Light source unit - Google Patents

Description

  The present invention relates to a light source unit using a light emitting element as a light source.

A conventional straight-tube LED lamp with a built-in power supply includes a substrate using an LED element, which is a light emitting element, as a light source, a cylindrical light-transmitting cover made of resin for housing the substrate inside, and a resin having terminals protruded. And a lighting device serving as a power supply unit inside the base. In the case of the double-sided power supply method, commercial power is applied to the bases at both ends of the straight tube LED lamp.
In Patent Literature 1, a separate drive circuit is disposed at each of the bases at both ends of a straight tube LED lamp, and a transmission line connecting a circuit in one base and a circuit in the other base is provided in a light-transmitting cover. A technique for storing is disclosed.

Utility Model Registration No. 3179599

  In the case of the two-sided power supply system, wiring must be performed from the lighting device to the bases on both sides, and commercial power must be applied to the lighting device. Therefore, the wiring length to the base on one side must be increased. In the case of a straight tube LED lamp in which the entire periphery of the light-transmitting cover has a light-transmitting resin cover structure, if the cover is thin, the wiring is visible from the outside, the appearance is not so good, and the design is poor. There is a problem that. In addition, there is a problem that wiring may be caught in the manufacturing process, making the process difficult and inferior in workability. In addition, there is a problem that wiring may be damaged at the time of manufacturing, which may lead to product failure.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a groove for a heat sink for heat dissipation and to provide wiring in the groove to prevent wiring from being cluttered, to improve the appearance, and to simplify the manufacturing process.

A light source unit according to the present invention includes a translucent cover of the cylindrical having translucency, board mounted with the light emitting element is mounted, wherein the inner surface of the translucent cover in a state where the stored inside the translucent cover and has a heat radiating portion opposing said to corresponding faces along the inner surface of the translucent cover, the other end of the first ferrule and the front KiToruhikari cover attached to one end of the translucent cover in the heat radiating portion A groove for accommodating an electric wire to be wired between the second base to be attached and a groove having a width dimension of the groove opening smaller than a diameter dimension of the inside of the groove in a cross section taken along a cylinder axis direction of the light-transmitting cover. And a light source mounting body formed .

  According to the light source unit of the present invention, the light source mounting body has a groove extending in the connection direction from the second base toward the first base on the surface facing the inner surface of the light-transmitting cover, and the groove for storing the electric wire. Is formed, the wiring can be cleaned, and the appearance of the appearance becomes clear. Further, according to the light source unit of the present invention, the electric wire can be protected by storing the electric wire in the groove. Further, according to the light source unit of the present invention, it is possible to prevent the wiring from being hindered in the assembling work, simplify the manufacturing process, and improve the workability.

FIG. 2 is a schematic diagram of a light source unit 100 according to Embodiment 1. The schematic diagram of the AA cross section of FIG. FIG. 2 is a schematic diagram showing an arrangement of a lighting circuit 150 in the light source unit 100 according to the first embodiment. The schematic diagram of the BB cross section of FIG. The schematic diagram which looked at the light source unit 100a which concerns on Embodiment 2 from the heat radiation part 132 side of the light source mounting body 130b. FIG. 6 is a schematic diagram of a cross section taken along line CC of FIG. 5 and an enlarged schematic diagram of a groove portion 134. The schematic diagram which looked at the light source unit 100b which concerns on Embodiment 3 from the light emission direction side, and the enlarged schematic diagram of the 1st base 120a. FIG. 14 is a schematic diagram of a partial perspective view of a light source unit 100c according to a fourth embodiment. The schematic diagram of the end surface which looked at the light source unit 100c which concerns on embodiment from P1 direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited by the embodiments described below. Further, in the following drawings, the size relationship of each component may be different from the actual one. In the description of the embodiments, when directions or positions such as top, bottom, left, right, front, rear, front, and back are indicated, those notations are described as such for convenience of explanation. It does not limit the arrangement, orientation, and the like of the devices, instruments, parts, and the like.

Embodiment 1 FIG.
*** Outline of the configuration of the light source unit 100 ***
FIG. 1 is a schematic diagram of a light source unit 100 according to the present embodiment.
FIG. 2 is a schematic diagram of a cross-sectional view taken along line AA of FIG.
The outline of the configuration of the light source unit 100 according to the present embodiment will be described with reference to FIGS.
The light source unit includes a light-transmitting cover 110, a pair of bases 120, a light source mount 130, and a light source module 140.
The light source unit 100 has a configuration in which a lighting circuit 150 for lighting the light source module 140 is incorporated. In FIG. 1, the lighting circuit 150 is omitted. The arrangement position of the lighting circuit 150 will be described later. The lighting circuit 150 is also called a lighting device or a power supply unit.
The light source unit 100 is also called a straight tube LED lamp.

<Transparent cover 110>
The light transmitting cover 110 is a cylindrical outer shell extending in the longitudinal direction. The longitudinal direction is also called the axial direction of the cylinder. The light transmitting cover 110 has a light transmitting property and a light diffusing property. The light transmitting cover 110 houses the light source module 140 inside. The light transmitting cover 110 is specifically made of a resin material such as polycarbonate (PC) or acrylic, and other resin materials may be used as long as the resin material has a light transmitting property and a light diffusing property. The light-transmitting cover 110 may be a white one containing a diffusing material as described above, or a transparent one. Further, the light transmitting cover 110 may be made of glass.
The shape of the cross section of the light-transmitting cover 110 may be any shape other than the cylindrical shape as long as it is cylindrical, and may be an elliptical cylindrical shape, a square cylindrical shape, a polygonal cylindrical shape, or the like.

<Base 120>
The pair of bases 120 are attached to both ends of the translucent cover 110. Each base 120 includes a pair of pins 121. The pin 121 may be fixed by being pressed into a fixing hole (not shown) provided in the base housing 124 in advance. It may be fixed to the body 124.
The base 120 in FIG. 1 illustrates a G13 type base. The number or shape of the pins 121 is not limited to FIG. 1 and may be other numbers or other shapes.
In some cases, one pair of bases 120 is described as a first base 120a and the other base is referred to as a second base 120b.
The lighting circuit 150 described below receives power supply from the pins 121 of the base 120.

  The translucent cover 110 and the base 120 are adhered by an adhesive or the like. Alternatively, the base 120 may be screwed to an end of the light source mounting body 130 to be described later with a screw for capping.

<Light source module 140>
The light source module 140 includes a substrate 141 and a light emitting element 142 arranged on the substrate 141 in a longitudinal direction.
Specifically, it is preferable to use a metal plate such as an aluminum plate, a copper plate, or an alloy plate, or a ceramic substrate, a metal core substrate, a metal core ceramic substrate, or the like, in order to enhance heat dissipation. If the temperature of the light emitting element 142 is equal to or lower than a specified value, a glass epoxy substrate (FR4 (Frame Retardant Type 4) or CEM1 to 3 (Composite epoxy material-1 to 3)) or a paper phenol substrate may be used. Further, the substrate 141 is formed to have a thickness that can ensure electrical insulation between the light emitting element 142 and the lighting circuit 150 as a power supply unit. In the case of a metal core substrate, insulation can be ensured by increasing the resist thickness.

  As the light emitting element 142, an LED is used. For example, a pseudo white LED in which a phosphor that converts the wavelength of blue light into yellow light is disposed and packaged on an LED chip that emits blue light of about 440 to 480 nm is used. Can be. Note that an LED chip directly mounted on the substrate 52, such as a chip-on-board (COB), may be used. As the light emitting element 142, an organic EL (electroluminescence), a laser diode (LD), or the like may be used instead of the LED.

  The substrate 141 is a rectangle elongated in the longitudinal direction. The substrate 141 need not be rectangular as long as it is long, and may be elliptical, polygonal, or the like. Further, the substrate 141 is not necessarily long, and this embodiment can be applied to a square, polygon, circle, ellipse, or the like that is not long.

The substrate 141 is a long flat plate that extends to both ends in the length direction of the light-transmitting cover 110, that is, extends to both bases 120. A circuit for supplying power to the light emitting element 142 is printed or wired on the substrate 141. A plurality of light emitting elements 142 are arranged at equal intervals on the upper surface of the substrate 141, and the electrodes of the plurality of light emitting elements 142 are physically and electrically joined to a circuit for supplying power to form a light source circuit. You.
The lower surface of the substrate 141 is bonded to a planar substrate mounting portion 131 of the light source mounting body 130 described later with an adhesive having high thermal conductivity or a double-sided tape.

  The surface of the substrate 141 is covered with a silicone-based high-reflection resist layer using a silicone-based resin material as a base material. The silicone-based high-reflection resist layer is layered on a circuit for supplying power to the substrate 141 and is exposed in the light emitting direction of the light emitting element 142. The silicone-based high-reflection resist layer is laid on the entire mounting surface of the substrate 141 except for the portion where the light emitting element 142 is bonded.

<Light source mounting body 130>
The light source mount 130 has a role of a heat sink for attaching the light source module 140 and radiating heat generated from the light emitting element 142. The light source mounting body 130 is formed of, for example, a metal such as aluminum.
The light source mounting body 130 may not have a role of a heat sink as long as the light source module 140 can be mounted thereon.

  The light source mounting body 130 of FIG. 2 has a D-shaped cross section AA and is hollow inside. The light source mounting body 130 is a long aluminum heat sink extending to both ends, that is, both bases in the longitudinal direction of the light transmitting cover 110. The hollow part penetrates in the longitudinal direction. The light source mounting body 130 has an arc-shaped heat radiating portion 132 along the inner surface 1101 of the translucent cover 110, and a substrate mounting portion 131 forming a linear portion for mounting the substrate. The lower portion of the heat radiating portion 132 of the light source mounting body 130 and the light transmitting cover 110 may be bonded with an adhesive. At this time, adhesive silicone is used as the adhesive.

  In FIG. 2, the light source mounting body 130 also serving as a long heat sink is described. However, as long as the light source module 140 can be mounted as described above, the configuration is not limited to FIG. The heat radiating portion 132 does not have to be a continuous arc shape, and may be partially missing. Further, the heat radiating section 132 may not be provided. Further, the board mounting portion 131 does not have to be plate-shaped as long as the board 141 can be mounted. Further, the board mounting portion 131 may be a pair of grooves in which the light source module 140 is mounted by housing both sides in the longitudinal direction of the board 141.

*** Description of configuration of light source unit 100 according to present embodiment ***
FIG. 3 is a schematic diagram showing an arrangement of the lighting circuit 150 in the light source unit 100 according to the present embodiment.
FIG. 4 is a schematic diagram of a BB cross section of FIG.
The arrangement of lighting circuit 150 in light source unit 100 according to the present embodiment will be described with reference to FIGS.
In FIG. 3, illustration of the light source mounting body 130 is omitted.

  The light source unit 100 includes a light-transmitting cylindrical light-transmitting cover 110 and a substrate 141 housed inside the light-transmitting cover 110. The light emitting element 142 is mounted on the substrate 141, and the lighting circuit 150 for lighting the light emitting element 142 is mounted in an empty area 1413 other than the area where the light emitting element 142 is mounted.

The substrate 141 has a light emitting surface 1411 on which the light emitting element 142 is mounted, and a back surface 1412 of the light emitting surface 1411. The lighting circuit 150 is mounted in an empty area 1413 on the light emitting surface 1411 or an empty area 1413 on the back surface 1412.
In FIG. 3, the lighting circuit 150 is mounted in a free space 1413 on the back surface 1412. Alternatively, the lighting circuit 150 may be mounted in the empty area 1413 of the light emitting surface 1411.

  The silicone-based high-reflection resist layer using a silicone-based resin material has the function of a conventional solder resist (the function of protecting the surface of the substrate 141). The silicone-based high-reflection resist layer is preferably white in order to improve the reflectance. The silicone-based high-reflection resist layer may be a wet type resist or a dry type resist. In the case of a wet type resist, it may be dried by heat curing (low precision) or dried by ultraviolet curing (high precision).

  The silicone resin material has a reflectance of 90% or more. The theoretical value for a layer thickness of 70 μm is 98%. The measured value at a layer thickness of 50 μm is 92-96%. Therefore, a resist using a silicone-based resin material can satisfy the demand for higher luminance (higher output). Further, the silicone resin material has an excellent property that it does not discolor even when exposed to high heat of about 120 ° C. or strong light for a long time. For example, in the step of soldering the light emitting element 142 to the substrate 141, (the resist laid on) the substrate 141 is exposed to an environment exceeding 250 ° C. When a silicone resin material is used as the resist base material, no change in optical characteristics due to discoloration (reduction in reflectance and change in hue of reflected light) does not occur. Furthermore, silicone-based resin materials have excellent weather resistance enough to be used for paints for outdoor buildings.

The lighting circuit 150 is arranged inside the light transmitting cover 110 pin 121.
Further, in the lighting circuit 150, the components 151 constituting the lighting circuit 150 are directly mounted in the empty area 1413 of the substrate 141 on which the light emitting element 142 is mounted. That is, in the light source unit 100, there is one substrate 141.
The empty area 1413 is an empty space of the substrate 141 on which the light emitting element 142 is mounted, and specifically, the back surface 1412 on which the light emitting element 142 is not mounted, or the light emitting area on which the light emitting element 142 is mounted. This is an empty space at the longitudinal end of the surface 1411.

  In the case where the lighting circuit 150 is mounted on the light-emitting surface 1411, the lighting circuit 150 is arranged on the light-emitting surface 1411 so as not to hinder the light distribution of the light emitted from the light-emitting element 142. That is, in the lighting circuit 150, the arrangement method of the components 151 is determined according to the light distribution characteristics of the light emitted by the light emitting element 142.

  Although not shown, the substrate 141 shown in FIG. 3 is provided with a through-hole, and the light-emitting element 142 and the lighting circuit 150 serving as a power supply unit conduct through the through-hole. Therefore, in the substrate 141 illustrated in FIG. 3, conduction between the light-emitting element 142 and the lighting circuit 150 can be performed without using a wire or the like.

As shown in FIG. 3, all components 151 may be arranged on the back surface 1412.
When the components 151 are arranged on both sides of the substrate 141, it is preferable to arrange the high-profile components on the rear surface 1412 and the low-profile components on the light-emitting surface 1411 so as not to hinder the light distribution.
When the tall component is arranged on the light-emitting surface 1411 and the low-tall component is arranged on the back surface 1412, it is preferable that the tall component is arranged at an end of the light-emitting surface 1411 in the longitudinal direction. When arranging the component 151 on the light emitting surface 1411 other than the end in the longitudinal direction, it is better not to arrange the tall component as much as possible so as not to hinder the light distribution.

  The circuit configuration of the lighting circuit 150 as a power supply unit includes an insulation type, a non-insulation type, a series type, and a switching type (single forward type, flyback type, push-pull type, half bridge type, full bridge type, step-down chopper type, step-up type). Chopper method).

  In the manufacturing process of the light source module 140 on which the light emitting element 142 and the lighting circuit 150 are mounted, both the light emitting surface 1411 and the rear surface 1412 can be mounted in a reflow process, or only one surface can be mounted by a flow method. The light emitting element 142 which is easily affected by the temperature may be reflowed last, and the lighting circuit 150 having heat resistance may be reflowed first.

FIG. 4 is a schematic diagram of a cross-sectional view taken along the line BB of FIG. 3, and illustrates the light source mounting body 130a.
The light source mounting body 130a shown in FIG. 4 differs from the light source mounting body 130 described in FIG. 2 in that an opening 1313 for inserting the lighting circuit 150 into the board mounting part 131 is formed.

The board mounting portion 131 has a plate shape for mounting the board 141 in contact with the back surface 1412 of the board 141, and is inserted into the translucent cover 110.
The substrate mounting portion 131 has an opening 1313 for inserting the lighting circuit 150 mounted on the back surface 1412 of the substrate 141 when the substrate 141 is mounted.

In the light source mounting body 130a shown in FIG. 4, an opening 1313 is formed in a portion corresponding to the lighting circuit 150 in the plate-shaped substrate mounting portion 131.
When mounting the board 141 on which the lighting circuit 150 is mounted on the back surface 1412 to the board mounting portion 131, the lighting circuit 150 is inserted into the opening 1313.
The substrate 141 is attached to the light source attachment 130a by bonding the back surface 1412 to a portion other than the opening 1313 of the substrate attachment 131.

*** Explanation of effects according to the present embodiment ***
According to the light source unit according to the present embodiment, the lighting circuit is effectively mounted in an empty space such as the back surface or the end of the front surface of the LED mounting board, whereby the size can be reduced, and the cost can be reduced. The function of the power supply unit can be enhanced.

  Specifically, according to the light source unit according to the present embodiment, the mounting substrates can be integrated into one and the space can be saved. Further, since the mounting space for the power supply unit is increased, the circuit configuration can be increased, for example, by arranging circuits for providing additional functions, and the functions can be enhanced. In addition, the time for assembling can be reduced. Further, it is possible to reduce the number of connectors for connecting the power supply unit and the light emitting element mounting unit and parts of the housing of the power supply unit, thereby reducing costs.

  In this embodiment mode, the silicone-based high-reflection resist layer laid on the entire mounting surface of the substrate 141 not only protects the mounting surface of the substrate 141 but also emits light directly or indirectly emitted from the light emitting element 142. The light can be reflected at a high ratio of 90% or more and used for illumination. Therefore, high luminance (high output) can be realized. In addition, since the silicone-based high-reflection resist layer is not deteriorated by the influence of high-temperature heat and strong light generated in association with high luminance (high output), high luminance (high output) is stably maintained. It becomes possible.

*** Other configuration ***
The light source unit according to the present embodiment can be applied to a bulb-shaped LED lamp, an instrument-integrated LED lighting, and the like, in addition to a straight tube LED lamp.

Embodiment 2 FIG.
In the present embodiment, points different from Embodiment 1 will be mainly described.
The light source unit 100a according to the present embodiment has a structure in which the lighting circuit 150 is housed inside the first base 120a. The light source unit 100a is of a two-sided power supply type, and commercial power is applied to the bases 120a and 120b on both sides of the light source unit 100a.

*** Configuration description ***
FIG. 5 is a schematic view of the light source unit 100a according to the present embodiment as viewed from the heat radiating portion 132 of the light source mounting body 130b.
FIG. 6 is a schematic diagram of a cross section taken along the line CC of FIG. 5 and an enlarged schematic diagram of the groove portion 134.
The light source unit 100a according to the present embodiment is different from the light source unit 100 of the first embodiment mainly in the arrangement position of the lighting circuit 150, the point of the both-side feeding method, and the shape of the light source mounting body 130b.
In the present embodiment, components having the same functions as those described in Embodiment 1 are denoted by the same reference numerals, and description thereof may be omitted.

As shown in FIG. 5, the lighting circuit 150 is housed inside the first base 120a.
In the present embodiment, the lighting circuit 150 is housed in only one of the first bases 120a. However, a separate lighting circuit is used as the lighting circuit 150, and both sides of the first base 120a and the second base 120b are used. The lighting circuit 150 may be housed.

The first base 120 a is attached to one end of the translucent cover 110.
The first base 120a houses a lighting circuit 150 for lighting the light emitting element 142 therein, and is connected to the lighting circuit 150 by an electric wire 160a.
The second base 120b is attached to the other end of the translucent cover 110.
The second base 120b is connected to the lighting circuit 150 via the electric wire 160b.
That is, the lighting circuit 150 is connected to the pin 121a of the first base 120a via the electric wire 160a, and is connected to the pin 121b of the second base 120b via the electric wire 160b. Lighting circuit 150 is supplied with power from both pins 121a and 121b.

  As shown in FIG. 5, the electric wire 160b is wired in the connection direction from the second base 120b to the first base 120a, that is, in the longitudinal direction.

The light source mounting body 130b is different from the light source mounting body 130 of the first embodiment described with reference to FIG. 2 in that a pair of wall portions protruding toward the light emitting direction at both ends in the short direction of the planar substrate mounting portion 131. 133 and the heat radiation part 132 is provided with a groove 134.
The pair of walls 133 has a role of a guide when attaching the board 141 to the board attaching section 131.

The light source mounting body 130b is mounted with a substrate 141 on which the light emitting element 142 is mounted, and is housed inside the translucent cover 110. Further, the light source mounting body 130b has a heat radiating portion 132 facing the inner surface 1101 of the light transmitting cover 110. The heat radiating portion surface 1321 of the heat radiating portion 132 faces the inner surface 1101 of the light transmitting cover 110.
The light source mount 130b is also called a heat sink.

The material of the light source mounting body 130b is a metal material such as aluminum, copper, ceramic, or magnesium, a composite material containing at least one of these metal materials, or a resin material.
The light source mounting body 130b may have a bowl-shaped, triangular, or polygonal cross section. Further, the light source mounting body 130b may be an H steel shape, a flat plate shape, or the like.

  In the light source mounting body 130b, a groove 134 extending in a connection direction from the second base 120b to the first base 120a is formed on the heat radiation part surface 1321 facing the inner surface 1101 of the light transmitting cover 110.

The groove 134 houses the electric wire 160b.
The groove 134 has a circular cross section that cuts the connection direction and has a part of the circumference as the groove opening 1341.
The width L2 of the groove opening 1341 is smaller than the circular diameter L1. That is, since the groove 134 is formed such that the diameter of the groove opening 1341 is smaller than the diameter of the inside of the groove, the structure is such that the electric wire 160b stored inside is difficult to come off.
The cross section of the groove 134 may be a square, a triangle, a trapezoid, a gourd, or the like, in addition to a circle.

  As shown in FIG. 6, the groove 134 is formed near the center of the bottom 1322 and the side 1323 in the heat radiation part 132. The groove 134 may be formed near the bottom 1322, near the side 1323, or the like.

Further, the light source mounting body 130b includes a protrusion 1342 protruding from the inner wall of the groove 134. The protrusion 1342 presses the electric wire 160b housed in the groove 134. However, the projection 1342 may be omitted.
The protrusions 1342 hold down the electric wires 160b, so that the electric wires 160b housed in the groove portions 134 can be harder to come off.

*** Explanation of effects according to the present embodiment ***
According to the light source unit according to the present embodiment, since the groove is formed in the heat radiating portion and the electric wire is stored in the groove, it is possible to prevent the wiring from being cluttered, to make the wiring look beautiful on the external appearance, and to protect the electric wire. can do.
Further, according to the light source unit according to the present embodiment, it is possible to prevent the wiring from hindering the assembling work, thereby simplifying the manufacturing process.

Embodiment 3 FIG.
In the present embodiment, points different from Embodiments 1 and 2 will be mainly described.
In the present embodiment, the same components as those described in the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted.

*** Configuration description ***
FIG. 7 is a schematic diagram of the light source unit 100b according to the present embodiment as viewed from the light emitting direction side, and an enlarged schematic diagram of the first base 120a.
The light source unit 100b according to the present embodiment has a structure in which the lighting circuit 150 is housed inside the second base 120b.
The light source unit 100b is of a one-sided power supply type, and power is supplied only to the pins 121b of the second base 120b in which the lighting circuit 150 is housed. The second base 120b is also referred to as a power supply base, and the pin 121b is also referred to as a power supply pin.

  In the present embodiment, a G13 type base is described as an example of the first base 120a and the second base 120b, but the present embodiment can be applied to other bases.

No power is supplied to the pins 121a of the first base 120a, and the first base 120a has a role of a mechanical structure when the light source unit 100b is mounted on the socket of the lighting fixture. Therefore, the first base 120a is also referred to as a non-power supply base, and the pin 121a is also referred to as a non-power supply pin. The first base 120a is an example of a base, and the pair of pins 121a is an example of a pair of pins.
The pair of pins 121a are electrically connected by a conductor 122a.

The first base 120a has a pair of pins 121a electrically connected via the protection element 200. The protection element 200 is a circuit protection element for protecting at least either the lighting circuit 150 or the light source circuit including the light emitting element 142.
The protection element 200 is disposed inside one of the pins 121a1 of the pair of pins 121a. That is, one of the pins 121a1 includes the protection element 200.
One of the pins 121a1 of the pair of pins 121a has an element accommodating portion 1211 formed therein. The protection element 200 is arranged in the element housing section 1211.

  The light source unit 100b includes a first base 120a, a translucent cover 110 to which the first base 120a is attached at one end, a light source mounting body 130 to which the substrate 141 is attached, and which is housed inside the translucent cover 110, and a translucent cover. A second base 120b attached to the other end of the base 110. The second base 120b houses a lighting circuit 150 for lighting the light emitting element 142 therein, and supplies power to the lighting circuit 150.

The protection element 200 is, specifically, a fuse, a varistor, a PTC thermistor, an NTC thermistor, a Zener diode, or the like.
Further, as a method of fixing the protection element 200 inside the pin 121a1 and fixing the same, there are a method of fixing by caulking, a method of filling the element housing portion 1211 with a fluid resin material or an adhesive and drying and solidifying the element. .

  In the present embodiment, the case where the protection element 200 is built in the pin 121a of the first base 120a has been described, but the protection element 200 may be built in the pin 121b of the second base 120b. In this case, when the lighting circuit 150 is housed in the second base 120b or the light-transmitting cover, and power is supplied to the lighting circuit from the second base 120b, the lighting circuit 150 is connected to the lighting circuit 150 via the protection element 200 built in the pin 121b. Powered. Therefore, the lighting circuit 150 can be protected from high voltage, large current, and the like due to external noise and the like.

*** Explanation of effects according to the present embodiment ***
According to the base according to the present embodiment, since the protection element is already housed in the pins, the lamp assembling operation is simplified, and the working efficiency is improved. Further, since the protection element is built in and fixed to the pin, shock and vibration applied to the protection element from the outside are reduced, and the protection element can be protected. Further, since heat generated when the protection element operates (for example, blows) inside the element accommodating portion is radiated to the outside via the pin, the base housing of the first base formed of a resin material is used. Less likely to deform.

Embodiment 4 FIG.
In the present embodiment, points different from Embodiments 1 to 3 will be mainly described.
Further, in the present embodiment, the same components as those described in Embodiments 1 to 3 are denoted by the same reference numerals, and description thereof will be omitted.

*** Configuration description ***
FIG. 8 is a schematic diagram of a partial perspective view of the light source unit 100c according to the present embodiment.
FIG. 9 is a schematic diagram of an end face of the light source unit 100c according to the present embodiment as viewed from the P1 direction.
The configuration of the light source unit 100c according to the present embodiment will be described with reference to FIGS.

  The light source unit 100c according to the present embodiment is different from the first to third embodiments in that the light source mounting body 130 includes only the substrate mounting portion 131a and the mounting of the substrate 141 to the substrate mounting portion 131a. The method is different from the method in that a metal housing 152 that houses the lighting circuit 150 is provided.

First, the configuration of the board mounting portion 131a will be described.
The light source unit 100c is a light-transmitting cylindrical light-transmitting cover 110 formed of a resin material, and has a light-transmitting cover 110 that houses a substrate 141 on which the light-emitting element 142 is mounted.
The board mounting portion 131a is made of resin, is provided in the light transmitting cover 110 in the axial direction of the light transmitting cover 110, and is a partition that partitions the internal space of the light transmitting cover 110.

The substrate mounting portion 131a has a substrate 141 mounted on one surface 1314 and a lighting circuit 150 for lighting the light emitting element 142 mounted on the other surface 1315. Side portions 1316 on both sides of the board mounting portion 131a are fixed to the inner surface 1101 of the light transmitting cover 110. That is, the board mounting portion 131a divides the internal space of the translucent cover 110 into the board 141 side and the lighting circuit 150 side. The board mounting portion 131a serves as a partition separating the board 141 and the lighting circuit 150.
8 and 9, the lighting circuit 150 is housed in the metal housing 152, but the metal housing 152 may be omitted. That is, the lighting circuit 150 may be directly attached to the other surface 1315 of the board attaching portion 131a.

When the light transmitting cover 110 is formed using a resin material such as polycarbonate, the light transmitting cover 110 and the substrate mounting portion 131a may be integrally formed by a method such as an extrusion molding method.
Further, the board mounting portion 131a may be formed of a resin material different from the resin material on which the light transmitting cover 110 is formed. That is, the substrate mounting portion 131a serving as a partition wall may be made of another material having performance such as flame retardancy, electrical insulation, heat shrinkage, and heat dissipation. Specifically, the light-transmitting cover 110 is formed of polycarbonate, and the substrate mounting portion 131a is made of polyethylene, glass, or fiber-reinforced resin having flame resistance of 94-V0 or more in UL94 standard defined by United States Underwriters Laboratories (UL). It may be formed by using Fiber Reinforced Plastics (FRP), glass-fiber reinforced resin (GRP), or the like.
The substrate mounting portion 131 may be formed of a resin material containing a heat conductive filler. With such a configuration, the operating heat generated by the light emitting element 142 can be efficiently transmitted to the outside of the light transmitting cover 110. it can.

Next, a method of attaching the board 141 to the board attaching portion 131a will be described.
The light source unit 100c has a protrusion 1102 that protrudes from the inner surface 1101 of the translucent cover 110 and that presses the substrate 141 attached to one surface 1314 against the one surface 1314.
As shown in FIG. 9, one surface 1314 of the substrate mounting portion 131a and the protruding portion 1102 form a slit-shaped storage groove 135 for storing the substrate side portions 1414 on both sides of the substrate 141. The substrate 141 can be attached to the substrate mounting portion 131a by sliding the substrate 141 to accommodate the substrate side portions 1414 on both sides of the substrate 141 in the slit-like accommodation grooves 135. The storage groove 135 allows the substrate 141 to be mounted on the substrate mounting portion 131a without using an adhesive or the like.

  When the light transmitting cover 110 is formed using a resin material such as polycarbonate, the light transmitting cover 110 and the protrusion 1102 may be integrally formed by a method such as an extrusion molding method.

  Further, the protruding portion 1102 may be formed of a resin material different from the resin material on which the light-transmitting cover 110 is formed. The protruding portion 1102 may be formed using a high-reflection resin material (light-shielding material). With such a configuration, light emitted from the light-emitting element 142 can be efficiently extracted to the outside of the light-transmitting cover 110. Can be.

  Further, the protruding portion 1102 may be formed of a different material from the light transmitting cover 110 and the substrate mounting portion 131a. In this case, the light transmitting cover 110, the substrate mounting portion 131a, and the protruding portion 1102 are formed by multicolor extrusion. They may be integrally formed by a method such as a molding method.

  As shown in FIG. 9, in the storage groove 135, the substrate mounting portion 131 a and the protruding portion 1102 are not parallel, and the protruding portion 1102 is formed obliquely inward toward the substrate mounting portion 131 a. By forming the protruding portion 1102 in this way, when the substrate 141 is stored in the storage groove 135, the substrate 141 is pressed against the substrate mounting portion 131a, and the substrate 141 and the substrate mounting portion 131a are brought into close contact with no gap. be able to.

Next, the metal housing 152 will be described.
The light source unit 100c includes a metal housing 152 that houses the lighting circuit 150, and is attached to the other surface 1315 of the board mounting portion 131a to attach the lighting circuit 150 to the other surface 1315.
The metal housing 152 has a semi-cylindrical cross section, and the bottom surface portion 1521 is fixed to the other surface 1315 of the board mounting portion 131a. Specifically, the metal housing 152 is fixed to the other surface 1315 of the board mounting portion 131a with an adhesive or the like.
The shape of the cross section of the metal housing 152 may be any shape as long as the lighting circuit 150 can be covered with metal, and may be a triangle, a quadrangle, a polygon, or the like, in addition to the Kamaboko shape.

*** Explanation of effects according to the present embodiment ***
According to the light source unit according to the present embodiment, the cost can be reduced because the light-transmitting cover is made of a resin structure such as polycarbonate all around. In addition, since the lighting circuit can be closed with metal, there is no danger of smoke and ignition.

Further, according to the light source unit according to the present embodiment, the storage groove having the slit structure is provided inside the light-transmitting cover, and the substrate on which the light-emitting element is mounted can be easily mounted without using an adhesive or the like. It can shorten the manufacturing process and reduce the cost.
Since the slit structure of the storage groove is oblique, the substrate can be brought into close contact with the substrate mounting portion, and the heat dissipation can be improved.

  Further, according to the light source unit according to the present embodiment, it is possible to suppress thermal expansion during lighting by employing a resin material having excellent heat shrinkability for the partition part that separates the lighting circuit part and the light emitting element part. , The overall length can be kept within the standard. In addition, by adopting a resin material having excellent electric insulation and heat dissipation as the resin material of the partition, it is possible to improve the insulation with respect to the lighting circuit and efficiently dissipate the heat generated from the light emitting element.

Although the first to fourth embodiments of the present invention have been described above, two or more of these embodiments may be combined and implemented. Alternatively, one of these embodiments may be partially implemented. Alternatively, of these embodiments, two or more embodiments may be partially combined. In addition, these two embodiments may be implemented in any combination as a whole or a part.
The above embodiment is essentially a preferred example, and is not intended to limit the scope of the present invention, its application, and application, and various modifications can be made as necessary. .

  100, 100a, 100b, 100c Light source unit, 110 translucent cover, 1101 inner surface, 1102 protrusion, 120 base, 120a first base, 120b second base, 121 pin, 121a, 121a1, 121b pin, 1211 element housing, 122a conductor, 124 base housing, 130, 130a, 130b light source mounting, 131, 131a substrate mounting, 1313 opening, 1314 one surface, 1315 the other surface, 1316 side, 132 heat radiator, 1321 heat radiator Surface, 1322 bottom, 1323 side, 133 wall, 134 groove, 1341 groove opening, 1342 protrusion, 135 storage groove, 140 light source module, 141 substrate, 142 light emitting element, 1411 light emitting surface, 1412 back surface, 1413 free space , 1414 units Side, 150 lighting circuit, 151 parts, 152 a metal housing, 1521 bottom portion, 160,160B, 160a wire, 200 protection device.

Claims (4)

A cylindrical translucent cover having translucency;
A substrate on which the light emitting element is mounted is attached, and has a heat radiating portion facing the inner surface of the light transmitting cover in a state housed inside the light transmitting cover, and along the inner surface of the light transmitting cover in the heat radiating portion. On a corresponding surface, a groove portion in which an electric wire wired between a first base attached to one end of the light-transmitting cover and a second base attached to the other end of the light-transmitting cover is housed, A light source mounting body in which a groove in which a width dimension of the groove opening is smaller than a diameter dimension of the inside of the groove in a cross section cut along the cylinder axis direction of the light-transmitting cover,
The light source mounting body is hollow inside,
The heat dissipating portion has an arcuate surface along the inner surface of the light-transmitting cover, and has an arcuate rear surface corresponding to the surface, forming the hollow.
The light source unit, wherein the groove portion is formed between the front surface portion and the rear surface portion without protruding from the rear surface portion to the hollow. A lighting circuit for lighting the light emitting element is housed inside the first base,
The light source unit according to claim 1, wherein the second base is connected to the lighting circuit via the electric wire. The light source mounting body,
The light source unit according to claim 1, further comprising a protrusion protruding from an inner wall of the groove toward the groove opening, the protrusion pressing the electric wire housed in the groove. The groove,
4. The cross-section taken along the cylinder axis direction is a circle having a part of the circumference as the groove opening, and the width of the groove opening is smaller than the diameter of the circle. The light source unit according to claim 1.

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