LED light source unit

Abstract

To provide an LED light source unit which can be miniaturized and which can be produced at low cost.SOLUTION: An LED light source unit includes an LED mounting substrate 110, a mounting member 120, and a cover member 130. The LED mounting substrate 110 is a substrate on which LEDs 111, an electrolytic capacitor 112, and power source components 113 are mounted, and on one surface, the LEDs 111 are mounted. The mounting member 120 is the mounting member 120 with respect to a part 201 to be mounted, and on a surface side opposing to the part 201 to be mounted, a connection part 121 to the part 201 to be connected is provided. On the surface side opposite from the surface opposing to the part 201 to be mounted of the mounting member 120, the LED mounting substrate 110 is arranged so that it opposes to the surface side opposite from the mounting surface of the LEDs 111. The cover member 130 is arranged in a state of covering the LED mounting substrate 110, and the power source components 113 mounted on the LED mounting substrate 110 are stored in a space between the mounting member 120 and the cover member 130.SELECTED DRAWING: Figure 1

Description

Technical Field

[0007] ,

[0001] The present invention relates to an LED light source unit.

Background Art

[0002] Conventionally, fluorescent lamps have been widely used as lighting fixtures for home and facilities. On the other hand, in recent years, LED light source units using light-emitting diodes (LEDs) with lower power consumption than fluorescent lamps have been increasingly used.

[0003] In the above-mentioned LED light source unit, the LED and the power supply circuit for supplying power to the LED are respectively mounted on separate substrates and housed in separate locations inside the unit (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the LED light source unit described in Patent Document 1, since separate independent spaces for housing the LED substrate and the power supply circuit board are required inside the unit, the unit becomes larger. Further, in the LED light source unit described in Patent Document 1, at least two boards for the LED and the power supply circuit are required, so the number of components increases and the manufacturing cost becomes high.

[0006] Therefore, an object of the present invention is to provide an LED light source unit that can be miniaturized and manufactured at a low cost.

Means for Solving the Problems

[0007] To achieve the above objective, the LED light source unit of the present invention is Including the main body, LED mounting board, mounting member, and cover member, The main body portion has a mounting portion, The mounting member is a mounting member for the part to be mounted, and has a connection portion to the part to be mounted on the side facing the part to be mounted. The LED mounting substrate is positioned on the side of the mounting member opposite to the side facing the mounting portion. The LED mounting substrate has LEDs mounted on the side facing the cover member, and has an inward recess on its side. The cover member is positioned to cover the LED mounting substrate, and has a protrusion on its inner wall that protrudes inward, and the two are fixed together in a manner that covers the LED mounting substrate by fitting the protrusion of the cover member with the recess of the LED mounting substrate. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide an LED light source unit that can be miniaturized and manufactured at low cost. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1(A) is a perspective view showing an example of the configuration of the LED light source unit of Embodiment 1, and Figure 1(B) is an exploded perspective view of the LED light source unit shown in Figure 1(A). [Figure 2] Figure 2 is an exploded perspective view showing an example of the configuration of the LED light source unit of Embodiment 2. [Figure 3] Figure 3 is a plan view showing an example of an LED mounting substrate and cover member in the LED light source unit of Embodiment 3. [Modes for carrying out the invention]

[0010] The LED light source unit of the present invention will be described below with reference to the figures. The present invention is not limited or restricted in any way by the following embodiments. In the following figures, the same parts are denoted by the same reference numerals. Also, in the figures, for the sake of explanation, the structure of each part may be shown in a simplified manner, and the dimensional ratios of each part may be shown schematically and may differ from the actual dimensions. Unless otherwise specified, the descriptions of each embodiment can be used interchangeably with each other.

[0011] [Embodiment 1] Figure 1(A) is a perspective view showing an example of the configuration of the LED light source unit of this embodiment, and Figure 1(B) is an exploded perspective view of the LED light source unit shown in Figure 1(A). As shown in Figures 1(A) and (B), the LED light source unit of this embodiment includes an LED mounting board 110, a mounting member 120, and a cover member 130. The LED mounting board 110 is a board on which LEDs 111, electrolytic capacitors 112, and power supply components 113 are mounted, with the LEDs 111 mounted on one surface (mounting surface, the bottom surface in Figure 1(B)). The mounting member 120 is a mounting member 120 for the mounting portion 201 of the main body 200, and has a connection portion 121 to the mounting portion 201 on the surface facing the mounting portion 201 (the top surface in Figure 1(B)). Note that the main body 200 in Figures 1(A) and (B) is not a component of the LED light source unit in this example, but rather the part to which the LED light source unit in this example is attached when the LED light source unit in this example is used. In the LED light source unit of this embodiment, the LED mounting substrate 110 is positioned on the side of the mounting member 120 opposite to the side facing the mounting portion 201 (the top surface in Figure 1(B)) (the bottom surface in Figure 1(B)), with the side opposite to the mounting surface of the LED 111 (the top surface in Figure 1(B)) facing it. The cover member 130 is positioned to cover the LED mounting substrate 110. The power supply component 113 mounted on the LED mounting substrate is housed in the space between the mounting member 120 and the cover member 130.

[0012] As shown in Figures 1(A) and (B), the LED light source unit of this embodiment may be, for example, a straight tube type. If the LED light source unit of this embodiment is a straight tube type, the main body 200 may be, for example, a repurposed straight tube fluorescent lamp that was previously installed in the ceiling of a home or facility for the installation of the LED light source unit of this embodiment. In this way, the LED light source unit of this embodiment can replace the straight tube fluorescent lamps that have been used as lighting fixtures for homes and facilities.

[0013] (LED mounting board) As described above, the LED mounting board 110 is a board on which the LED 111, electrolytic capacitor 112, and power supply component 113 are mounted, with the LED 111 mounted on the mounting surface. In this embodiment, since the LED 111 and the power supply component 113 are mounted on a single board 110, the number of components can be reduced compared to mounting them on different boards, and it can be manufactured at a lower cost. Furthermore, in this embodiment, the LED light source unit does not require separate, independent spaces to house the LED and power supply component inside the unit, so it can be made smaller.

[0014] Figure 1(B) shows an example in which 13 LEDs 111 are mounted on the mounting surface of the LED mounting board 110. However, in this embodiment, the number of LEDs 111 is not limited to this and may be increased or decreased as needed. Each LED 111 is connected to an electrolytic capacitor 112 and a power supply component 113 by power supply connection means such as wiring.

[0015] The power supply component 113 consists of, for example, a resistor, diode, IC chip, small capacitor, etc., and can be connected to an external AC power supply (for example, a 100V commercial power supply) via the connection terminal 114 described later. It rectifies the output of the AC power supply and outputs a pulsating waveform. The electrolytic capacitor 112 smooths the pulsating waveform output from the power supply component 113 into DC, and then supplies it to the LED 111 to drive the LED 111.

[0016] As shown in FIG. 1(B), it is preferable that the electrolytic capacitor 112 is arranged on both end sides in the longitudinal direction on the LED mounting substrate 110. By doing so, the irradiation light from the LED 111 can be blocked by the electrolytic capacitor 112, and it is possible to prevent a shadow from appearing in the visual recognition from the outside.

[0017] The power supply component 113 is mounted on the LED mounting substrate 110, and as long as it is accommodated in the space between the mounting member 120 and the cover member 130, there is no particular limitation on its arrangement position. For example, as shown in FIG. 1(B), it may be arranged on the mounting surface of the LED mounting substrate 110.

[0018] For example, as shown in FIG. 1(B), the LED mounting substrate 110 may further have a connection terminal 114 mounted thereon. The connection terminal 114 functions as a connection portion of the power supply line from the AC power supply. The connection terminal 114 may, for example, have a configuration in which the power supply line cannot be removed once it is connected, or may have a configuration in which the connected power supply line can be removed by pressing a release button. The arrangement position of the connection terminal 114 is not particularly limited. For example, as shown in FIG. 1(B), it may be arranged on the surface opposite to the mounting surface of the LED mounting substrate 110 (the upper surface in FIG. 1(B)).

[0019] (Mounting member) As described above, the mounting member 120 is the mounting member 120 for the mounting portion 201 of the main body portion 200, and has a connection portion 121 to the mounting portion on the surface side facing the mounting portion 201. The mounting member 120 may, for example, have a through hole for the purpose of avoiding collision with the connection terminal 114 arranged on the surface opposite to the mounting surface of the LED mounting substrate 110, as shown in FIG. 1(B).

[0020] The mounting member 120 may be, for example, a heat sink. If the mounting member 120 is a heat sink, the heat generated by the LED 111 and the power supply component 113 mounted on the LED mounting substrate 110 can be efficiently dissipated. For example, if the mounting member 120 is formed using aluminum and its alloys, magnesium and its alloys, iron and its alloys, copper and its alloys, titanium and its alloys, etc., it can function as a heat sink. Also, for example, the mounting member 120 can be made to function as a heat sink by forming it with a resin containing a thermally conductive filler. Examples of the resin include polybutylene terephthalate, polyethylene terephthalate, polycarbonate, polyamide, polyphenylene sulfide, polymethyl methacrylate, etc. The mounting member 120 is, for example, plate-shaped.

[0021] In the LED light source unit of this embodiment, for example, the LED mounting substrate 110 may be fixed to the mounting member 120. If the LED mounting substrate 110 is fixed to the mounting member 120, the heat generated by the LED 111 and the power supply component 113 mounted on the LED mounting substrate 110 can be dissipated more efficiently.

[0022] (Cover member) As described above, the cover member 130 is arranged to cover the LED mounting substrate 110. Thereby, the LED 111 and the power supply component 113 mounted on the LED mounting substrate 110 are accommodated in the space between the mounting member 120 and the cover member 130.

[0023] The cover member 130 may, for example, be capable of transmitting the irradiation light from the LED 111 or diffusing the irradiation light. The material for forming the cover member 130 is not particularly limited, and examples include light-transmissive polycarbonate, acrylic resin, etc.

[0024] In Figure 1, the cross-sectional shape of the cover member 130 is approximately semi-elliptical, but in this embodiment, the cross-sectional shape of the cover member 130 is not limited to this. The cross-sectional shape of the cover member 130 may be, for example, approximately circular, approximately trapezoidal, approximately rectangular, etc.

[0025] [Embodiment 2] Figure 2 is an exploded perspective view showing an example of the configuration of the LED light source unit of this embodiment. As shown in Figure 2, the LED light source unit of this embodiment is similar to the LED light source unit of Embodiment 1, except that it further has a packing 140, and the packing 140 is located in the contact area between the mounting member 120 and the cover member 130. For example, a waterproof packing can be used as the packing 140, and the material of the packing is not particularly limited, but can be rubber, silicone, etc.

[0026] In the LED light source unit of this embodiment, both the LED 111 and the power supply component 113 are mounted on the LED mounting board 110, and the LED 111 and the power supply component 113 mounted on the LED mounting board 110 are housed in the space between the mounting member 120 and the cover member 130. Therefore, in the LED light source unit of this embodiment, there is no need to provide separate waterproofing mechanisms for the LED 111 and the power supply component 113, and the waterproofing mechanism can be simplified to just one gasket 140.

[0027] [Embodiment 3] Figure 3 is a plan view showing an example of the LED mounting substrate 110 and cover member 130 in the LED light source unit of this embodiment. In the LED light source unit of this embodiment, the inner wall of the cover member 130 in the longitudinal direction has protrusions 135 and 136 that project inward, and the longitudinal end of the LED mounting substrate 110 has recesses 115 and 116 that project inward. The two are fixed together inside the cover member 130 by fitting the protrusions 135 and 136 of the cover member 130 and the recesses 115 and 116 of the LED mounting substrate 110 together. The other configurations of the LED light source unit of this embodiment are the same as in Embodiment 1 or 2.

[0028] In the LED light source unit of this embodiment, it is preferable that the protrusion 135 of the cover member is located between the LEDs 111 and 111 of the LED mounting substrate 110 (between two adjacent LEDs 111 in the longitudinal direction) in the longitudinal direction of the unit. In this way, the protrusion 135 blocks the light emitted from the LEDs 111, preventing shadows from appearing when viewed from the outside. As mentioned above, the inner wall of the cover member 130 in the longitudinal direction may have protrusions 136 in addition to the protrusion 135, between the electrolytic capacitors 112 located on both ends of the LED mounting substrate 110 in the longitudinal direction and the LEDs 111 adjacent to them. Furthermore, the inner wall of the cover member 130 in the short direction may have protrusions 137 that project inward.

[0029] Although the present invention has been described above with reference to embodiments, the present invention is not limited to the above embodiments. Various modifications to the configuration and details of the present invention can be made that will be understood by those skilled in the art within the scope of the present invention. [Industrial applicability]

[0030] According to the present invention, it is possible to provide an LED light source unit that can be miniaturized and manufactured at low cost. The LED light source unit of the present invention can be used in a wide range of applications, such as lighting fixtures for homes and facilities. [Explanation of symbols]

[0031] 110 LED mounting board 111 LED 112 Electrolytic Capacitors 113 Power supply components 114 Connection terminals 115, 116 recess 120 Mounting components 121 Connection part 130 Cover component 135, 136, 137 Convex parts 140 packing 200 Main body 201 Mounting part

Claims

1. Including the main body, LED mounting board, mounting member, and cover member, The main body portion has a mounting portion along its longitudinal direction, The mounting member is a mounting member for the part to be mounted, and has a connection portion to the part to be mounted on the side facing the part to be mounted. The LED mounting substrate is positioned on the side of the mounting member opposite to the side facing the mounting portion. The LED mounting substrate has LEDs mounted on the side facing the cover member, and has a plurality of inwardly oriented recesses on the side surface of the longitudinal end. The cover member is capable of diffusing the light emitted from the LED, is positioned to cover the LED mounting substrate, and has a plurality of protrusions projecting inward on its longitudinal inner wall. At least one of the recesses and the protrusions are located between two adjacent LEDs in the longitudinal direction. An LED light source unit characterized in that the protrusion of the cover member and the recess of the LED mounting substrate are fitted together, thereby fixing the two together in a state that covers the LED mounting substrate.

2. The LED light source unit according to claim 1, wherein the LED mounting board is a board on which the LED, electrolytic capacitor, and power supply components are mounted.

3. The LED is connected to the power supply component by a power supply connection means. The aforementioned power supply component is connected to an external AC power supply via connection terminals. The LED light source unit according to claim 2, wherein the mounting member is a flat plate-shaped mounting member for the part to be mounted.

4. Furthermore, it has a packing, The packing is positioned in the contact area between the mounting member and the cover member. The LED light source unit according to claim 2 or 3, wherein the power supply component mounted on the LED mounting board is housed in the space between the mounting member and the cover member.

5. The LED light source unit according to claim 1, wherein the mounting member is a heat sink.

6. The LED light source unit according to claim 1, wherein the protrusion of the cover member is located between the LEDs in the longitudinal direction of the LED light source unit.

7. The LED light source unit according to claim 1, wherein the cover member has a substantially semi-elliptical cross-sectional shape.

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