JP2023161402A - Mounting substrate, power supply device and lighting device - Google Patents

Abstract

To improve electrical reliability with a simple structure.SOLUTION: A mounting substrate 6 comprises a substrate body 60 and a liquid control unit 7. The substrate body 60 has a plurality of electronic components 61 mounted thereon, and includes a specific circuit region R1. The liquid control unit 7 is provided on the substrate body 60. The liquid control unit 7 controls the movement of liquid toward the specific circuit region R1 under the condition that liquid flows on one end surface of the substrate body 60 due to its own weight.SELECTED DRAWING: Figure 4

Description

The present disclosure generally relates to a mounting board, a power supply device, and a lighting device. More specifically, the present disclosure relates to a mounting board on which a plurality of electronic components are mounted, a power supply device including the mounting board, and a lighting device including the power supply device.

Patent Document 1 discloses a tracking-resistant material and a circuit board using the material. According to this circuit board, the comparative tracking index in the IEC tracking resistance test of the front and back layers is sufficiently high, and the overall carbide production rate is sufficiently small. Therefore, with this circuit board, it is possible to effectively prevent carbonization of the entire circuit board including the front and back surfaces as well as the inside, and it is also possible to effectively prevent tracking on the surface. As a result, this circuit board can effectively prevent both surface dielectric breakdown due to the formation of surface carbonized paths and dielectric breakdown in the thickness direction due to carbonization erosion in the thickness direction.

Japanese Patent Application Publication No. 6-124616

In the circuit board (mounted board) described in Patent Document 1, the manufacturing method may become complicated in order to improve tracking resistance (electrical reliability).

The present disclosure has been made in view of the above reasons, and aims to provide a mounting board, a power supply device, and a lighting device that can improve electrical reliability with a simple configuration.

A mounting board according to one aspect of the present disclosure includes a board main body and a liquid control section. The board body has a plurality of electronic components mounted thereon and includes a specific circuit area. The liquid control section is provided on the substrate main body. The liquid control unit controls the movement of the liquid toward the specific circuit area under a situation where the liquid flows over one end surface of the substrate main body due to its own weight.

A power supply device according to one aspect of the present disclosure includes the above-mentioned mounting board. The plurality of electronic components mounted on the substrate body constitute a power supply circuit that generates power to be supplied to a load.

A lighting device according to one aspect of the present disclosure includes the above power supply device, a light source unit, and a main body. The light source unit is the load and is turned on when the power is supplied from the power supply device. The main body accommodates or holds the power supply device and the light source unit.

According to the present disclosure, there is an advantage that electrical reliability can be improved with a simple configuration.

FIG. 1 is a perspective view of a lighting device (display device) according to an embodiment. FIG. 2 is an exploded perspective view of the above lighting device. FIG. 3 is an exploded perspective view of a power supply device according to one embodiment. FIG. 4 is a front view of a mounting board according to one embodiment. FIG. 5 is a sectional view of a main part of the mounting board same as above. FIG. 6A is a sectional view of a main part of a modification of the above mounting board. FIG. 6B is a cross-sectional view of a main part of another modification of the above mounting board.

A display device according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, each figure described in the following embodiments is a schematic diagram, and the respective ratios of the sizes and thicknesses of each component do not necessarily reflect the actual size ratios. Note that the configuration described in the embodiments below is only an example of the present disclosure. The present disclosure is not limited to the following embodiments, and various changes can be made depending on the design etc. as long as the effects of the present disclosure can be achieved.

(1) Overview of Embodiment The mounting board 6 (hereinafter abbreviated as the mounting board 6) according to the embodiment includes a board main body 60 and a liquid control section 7, as shown in FIGS. 3 and 4. In this embodiment, as an example, it is assumed that the liquid control section 7 includes one or more (nine in FIG. 4) slits 71 (through holes) provided in the substrate body 60.

A plurality of electronic components 61 are mounted on the board body 60. The board body 60 includes a specific circuit region R1. The "circuit area" as used in the present disclosure refers to a plurality of electronic components 61 that constitute a circuit (for example, power supply circuit E1: see FIGS. 3 and 4), a joint where terminals of each electronic component 61 are joined, and a board main body. This region includes the wiring pattern formed in 60. The "junction" referred to in the present disclosure includes a land or a pad, and may include a part of a wiring pattern. The specific circuit area R1 is a part of the entire circuit area on the mounting board 6. The number of specific circuit regions R1 is one or more. In the example of FIG. 4, the number of specific circuit regions R1 is seven.

The liquid control section 7 is provided on the substrate main body 60. The liquid control unit 7 controls the movement of the liquid toward the specific circuit region R1 under the condition that the liquid flows on one end surface of the substrate body 60 due to its own weight. "One end surface of the substrate body 60" in the present disclosure is one of both end surfaces of the substrate body 60 in the thickness direction, and is the first end surface 60A or the second end surface 60B (see FIG. 5) of the substrate body 60. . Hereinafter, the first end surface 60A may be simply referred to as a "front surface" and the second end surface 60B may simply be referred to as a "back surface."

In this embodiment, it is assumed that the specific circuit region R1 is a region with a lower potential or a region with a higher potential than adjacent surrounding regions. The specific circuit area R1 is not limited to the area on the front side of the board main body 60 or the area on the back side of the board main body 60. The specific circuit region R1 may correspond to an area on the front side, an area on the back side, or an area on both sides when the board main body 60 is viewed from the front. The “regions on both sides” are located within the same projection area when the substrate main body 60 is viewed from the front. In particular, the liquid may run on the front surface or on the back surface. Therefore, it is preferable that the specific circuit region R1 corresponds to "regions on both sides" of the board body 60.

The "liquid" referred to in this disclosure is not particularly limited. In an environment where the mounting board 6 is actually used (for example, an indoor environment), the "liquid" may correspond to condensed water. Further, when a tracking resistance test is performed on the mounting board 6, the "liquid" may correspond to an ammonium chloride solution used in the test.

If liquid (such as dew condensation water) moves to the specific circuit region R1, an abnormality such as a short circuit may occur. In particular, if the liquid moves to a specific circuit region R1 that has a lower potential (or a higher potential) than the surrounding area, short circuits may cause abnormalities such as heat generation. On the other hand, in the mounting board 6, the movement of the liquid is controlled by the liquid control section 7. Therefore, the mounting board 6 has the advantage that electrical reliability can be improved with a simple configuration.

Moreover, the power supply device 11 (hereinafter abbreviated as power supply device 11) according to the embodiment includes a mounting board 6, as shown in FIG. A plurality of electronic components 61 mounted on the board body 60 constitute a power supply circuit E1 (see FIGS. 3 and 4) that generates power to be supplied to a load L1 (see FIGS. 1 and 2). According to this configuration, it is possible to provide the power supply device 11 that can improve electrical reliability with a simple configuration.

In this disclosure, as an example, it is assumed that the load L1 is the light source unit A1 (see FIGS. 1 and 2). However, the type of load L1 is not limited to light source unit A1 (light source), and may be, for example, an electric motor.

Moreover, the lighting device X1 according to the embodiment includes a power supply device 11, a light source unit A1, and a main body 1, as shown in FIG. The light source unit A1 is a load L1, and is turned on by being supplied with power from the power supply device 11. The main body 1 houses or holds a power supply device 11 and a light source unit A1. According to this configuration, it is possible to provide the lighting device X1 that can improve electrical reliability with a simple configuration.

The type and usage form of the lighting device X1 are not particularly limited. However, considering the improvement in electrical reliability obtained by the liquid control unit 7, the lighting device It is preferable that the lighting device is of the form. For example, the lighting device X1 is preferably a guide light, an emergency light, or the like. Of course, even if the mounting board 6 is used in a manner in which the thickness direction thereof is oriented in the vertical direction, it can be expected that the electrical reliability by the liquid control section 7 will be considerably improved. In addition, in the following description, it is assumed that the lighting device X1 is a guide light (display device B1).

(2) Details of the embodiment (2-1) Configuration of the lighting device according to the embodiment The lighting device X1 (display device B1) will be described with reference to the drawings. The lighting device X1 described below is a guide light installed at an evacuation exit or a passageway to an evacuation exit of a facility (buildings such as offices and stores). The lighting device X1 is not limited to a guide light as described above. For example, the lighting device X1 may be used to display a specific location within a facility (such as a restroom). In the following description, unless otherwise specified, the vertical, longitudinal, and horizontal directions shown by arrows in FIG. 1 are defined as the vertical, longitudinal, and horizontal directions of the illumination device X1.

The lighting device X1 includes a light source unit A1 (load L1), a main body 1, a display block 2, a mounting plate 10, a power supply device 11, a terminal block 12, a battery unit 13, a connector 14, etc. (see FIGS. 1 and 2). .

The main body 1 is made of a synthetic resin material and has a rectangular box shape with an opening on the front surface (see FIG. 2). The main body 1 has a pair of left and right side walls 101. Each side wall 101 is formed into a rectangular plate shape. The pair of side walls 101 each have a wall surface 102 (inner wall surface). The wall surfaces 102 of the pair of side walls 101 face each other.

A plurality of holding portions H1 are provided on the wall surface 102 of the pair of side walls 101. By sliding the display block 2 downward along the wall surface 102, the plurality of holding parts H1 display the display block 2 in a manner that restricts movement along the thickness direction and further movement downward. Hold block 2. In short, the main body 1 holds the display block 2.

As shown in FIG. 2, the main body 1 houses a power supply device 11, a battery unit 13, a terminal block 12, a connector 14, a mounting plate 10, and the like.

The mounting plate 10 is formed into a plate shape from a metal material (see FIG. 2). The mounting plate 10 is screwed to the inner bottom surface of the main body 1. The power supply device 11 and the terminal block 12 are screwed to the mounting plate 10 and housed in the main body 1.

Battery unit 13 has a secondary battery. The battery unit 13 is removably attached to the mounting plate 10.

The power supply device 11 is configured to turn on the light source unit A1 (load L1). The power supply device 11 includes a mounting board 6 and a housing case 110.

The mounting board 6 includes a board body 60 and a liquid control section 7, as shown in FIGS. 3 and 4. The board main body 60 is a printed circuit board in which conductor wiring (wiring pattern) is provided on the front surface, back surface, and inside of a plate-shaped insulator. The type of substrate main body 60 is not particularly limited. The board body 60 may be a single-sided board with a wiring pattern formed on only one side, a double-sided board with a wiring pattern formed on both sides, or a multilayer board made of multiple layers.

The substrate body 60 includes a first end surface 60A (see FIGS. 3 to 5) and a second end surface 60B (see FIG. 5). FIG. 5 is a schematic cross-sectional view of main parts taken along line AA in FIG. 4. The first end surface 60A (front surface) is the front surface in the illustrated example. The second end surface 60B (back surface) is the rear surface in the illustrated example.

The plurality of electronic components 61 include, for example, lead components and chip components. A plurality of electronic components 61 are mounted on the board body 60. Many electronic components 61 (especially high-profile components) are mounted on the first end surface 60A side, and some electronic components 61 (especially low-profile components) are mounted on the second end surface 60B side. A plurality of electronic components 61 mounted on the board body 60 constitute a power supply circuit E1 that generates power to be supplied to the load L1.

The power supply circuit E1 is configured to light the light source unit A1 and charge the battery unit 13 with common power supplied from a common power source (for example, a commercial power system). Further, the power supply circuit E1 is configured to light the light source unit A1 with emergency power supplied (discharged) from the battery unit 13 during a power outage in the power system.

The housing case 110 has a cover 111 and a case 112, as shown in FIG. The cover 111 is formed into a rectangular box shape with an open rear surface. The case 112 is formed into a flat rectangular box shape with an open front. The housing case 110 houses the mounting board 6 therein.

A power supply side connector section 62 (see FIG. 4) is provided at the upper left end portion of the first end surface 60A. The power supply side connector part 62 is exposed from the housing case 110, and the terminals of the terminal block 12 are physically and electrically coupled to the power supply side connector part 62, so that the power supply circuit E1 can receive AC power from the commercial power supply. It becomes possible to receive.

Furthermore, a connection terminal 63 (see FIG. 4) is provided at the lower left end portion of the first end surface 60A. The connection terminal 63 is exposed from the housing case 110, and the terminal of the battery unit 13 is physically and electrically coupled to the connection terminal 63, so that the power supply circuit E1 can receive power from the battery unit 13 or It becomes possible to charge the unit 13.

Further, a light source side connector portion 64 (see FIG. 4) is provided at the upper right end portion of the first end surface 60A. The light source side connector section 64 is exposed from the housing case 110. In the light source side connector section 64, the connector of the electric wire connected to the connector 14 is physically and electrically coupled to the light source side connector section 64, so that the power supply circuit E1 can be connected to the light source unit A1 via the connector 14 for lighting. It becomes possible to supply electricity of

The liquid control section 7 is provided on the substrate main body 60. The liquid control unit 7 controls the movement of the liquid toward the specific circuit region R1 in a situation where the liquid flows on one end surface (the first end surface 60A or the second end surface 60B) of the substrate main body 60 due to its own weight. . Note that details of the liquid control section 7 will be described later.

The display panel 20 is illuminated by light emitted from a light source. The display block 2 includes a display panel 20, a light guide plate 21, and a holder 22 (see FIG. 2).

The display panel 20 is illuminated by light emitted from an LED (Light Emitting Diode) 300 (see FIG. 2), which is a light source. The display panel 20 is formed into a rectangular flat plate shape using a transparent synthetic resin material such as acrylic resin or polycarbonate resin. However, the display panel 20 may be formed of a translucent material other than synthetic resin, such as quartz glass. A pictogram 201 for evacuation guidance is displayed on the front surface (display surface 200) of the display panel 20 (see FIG. 1).

The light guide plate 21 is formed into a rectangular flat plate shape using a transparent synthetic resin material such as acrylic resin or polycarbonate resin. The light guide plate 21 is arranged behind the display panel 20 so that its front surface faces the rear surface of the display panel 20 (see FIG. 2). Light emitted from the light source unit A1 is incident on the upper surface (incidence surface 210) of the light guide plate 21. Light entering from the entrance surface 210 is guided through the light guide plate 21 and exits from the front surface (output surface) of the light guide plate 21 . Then, the display panel 20 is illuminated by the light emitted from the output surface of the light guide plate 21.

The holder 22 is made of a non-transparent synthetic resin material and is shaped like a square box with an open front and top surface. The holder 22 holds the display panel 20 and the light guide plate 21 so that the display panel 20 is placed in front of the light guide plate 21 (see FIG. 2).

Further, the holding body 22 has a plurality of plate-shaped slide pieces Y1 on its back surface. Each slide piece Y1 has a hook shape into which the corresponding holding portion H1 can be slidably inserted from below.

The display block 2 is held by the main body 1 by inserting and hooking a plurality of slide pieces Y1 into a plurality of holding parts H1, respectively.

The display block 2 is attached to the main body 1 so as to cover the remaining part of the opening of the main body 1 except for the upper part where the light source unit A1 is attached (see FIG. 1). When the light source unit A1 is attached to the main body 1, the entrance surface 210 of the light guide plate 21 and the output surface (lower surface) of the light guide 5 (see FIG. 2) of the light source unit A1 face each other in the vertical direction. Therefore, almost all of the light emitted from the output surface of the light guide 5 enters the light guide plate 21 from the entrance surface 210 of the light guide plate 21. The light incident on the light guide plate 21 is totally reflected at the rear surface of the holder 22 while traveling inside the light guide plate 21 and can be emitted forward from the output surface of the light guide plate 21 to illuminate the display panel 20.

The light source unit A1 includes a light emitting section, a light guide 5, and a housing 4 (see FIG. 2).

The light emitting unit includes an LED 300 (light source) that is a solid-state light source, and a substrate on which the LED 300 is mounted. The LED 300 is, for example, a packaged white LED for illumination. The board is a printed wiring board that is approximately T-shaped when viewed from the left and right. The LED 300 is mounted on the surface of the wide part of the board. A pair of electrodes are formed on the surface of the narrow portion of the substrate. One pair of electrodes is electrically connected to one anode and one cathode of the LED 300 via printed wiring on the board. The light emitting section is electrically connected to the power supply device 11 by inserting the narrow portion of the board into the connector 14 inside the main body 1 . It is preferable that the light source unit A1 further includes a heat radiating member or the like that is thermally coupled to the substrate and radiates heat from the LED 300 and the like.

The light guide 5 is made of a transparent synthetic resin material such as acrylic resin or polycarbonate resin and is formed into a square column shape (see FIG. 2). However, the shape of the light guide 5 is not limited to a square columnar shape, but may be a square pyramid shape, a square pyramid trapezoid shape, or the like.

Among the two bottom surfaces (left bottom surface and right bottom surface) facing each other in the longitudinal direction (axial direction) of the light guide 5, one bottom surface (right bottom surface) serves as an incident surface. Moreover, one side surface (lower surface) of the four side surfaces (front surface, rear surface, upper surface, and lower surface) of the light guide 5 serves as an output surface. Furthermore, a large number of grooves are provided on the side surface (upper surface) of the light guide 5 facing the exit surface.

The housing 4 is formed in the shape of a box that is elongated in the left-right direction and has an open rear surface and a lower surface. As shown in FIG. 2, the housing 4 has a pair of attachment pieces 46 and a pair of support pieces 47.

The pair of support pieces 47 protrude rearward from both left and right ends of the upper wall of the housing 4, one at a time. Further, the pair of attachment pieces 46 protrude rearward from both left and right ends of the upper wall of the housing 4, one at a time. The light source unit A1 is held in the main body 1 by the pair of support pieces 47 and the pair of support pieces 47 being engaged with predetermined locations on the main body 1.

Inside the housing 4, a light emitting section is housed at the right end, and a light guide body 5 is housed on the left side of the light emitting section. Specifically, the housing 4 accommodates the light guide 5 such that the incident surface of the light guide 5 faces the LED 300 of the light emitting section and the output surface of the light guide 5 is exposed from the bottom surface.

Below, the construction procedure of the display device B1 will be briefly explained.

First, the worker who performs the construction work pulls in the power wire from the power supply hole 15 (see Figure 2) provided on the bottom of the main body 1, and then attaches the main body 1 to the structure of the facility using wood screws or screw nails. attached to the body (for example, the wall of a building). Subsequently, the operator electrically connects the power wire drawn through the power hole 15 to the terminal block 12.

Then, the operator attaches the display block 2 to the main body 1. Specifically, the worker places the upper end of the display block 2 at the same position as the upper end of the main body 1 (or at a position slightly below the upper end) with respect to the main body 1 that is attached to the structure (wall surface) of the facility. ), the back surface of the display block 2 is brought into contact with the front surface of the main body 1. Then, by sliding the display block 2 downward along the pair of wall surfaces 102, the corresponding holding portion H1 slides into the inside of each slide piece Y1 of the display block 2. . As a result, the plurality of slide pieces Y1 slide and lock onto the plurality of holding parts H1, and the display block 2 is held.

Finally, the operator attaches the light source unit A1 to the main body 1. Specifically, the operator inserts the narrow part of the board on which the LED 300 is mounted into the connector 14 of the main body 1, inserts the pair of support pieces 47 inside the main body 1, and inserts the pair of mounting pieces 46 into the connector 14 of the main body 1. The claw provided at the tip of the body 1 is hooked onto the edge of the hole provided on the top surface of the main body 1. As a result, the light source unit A1 is attached to the main body 1 in such a manner that it is placed above the display block 2.

As described above, construction of the display device B1 is completed.

If it is necessary to replace the battery unit 13, etc., first remove the light source unit A1 from the main body 1, then remove the display block 2 from the main body 1 by sliding the display block 2 upward and then moving it forward. I can do it.

(2-2) Liquid Control Unit The liquid control unit 7 controls the liquid moving toward the specific circuit region R1 under the condition that the liquid is transmitted on the first end surface 60A or the second end surface 60B of the substrate main body 60 due to its own weight. Control movement. In the present embodiment, "controlling the movement of the liquid" assumes, for example, changing the traveling direction of the liquid to a predetermined direction, but is not limited to changing the traveling direction. "Controlling the movement of liquid" may mean reducing the amount of liquid movement or stopping the movement of liquid.

The liquid control section 7 includes one or more slits 71 (see FIG. 4) that penetrate the substrate main body 60 in the thickness direction. In the example of FIG. 4, nine slits 71 are provided.

The liquid control section 7 is provided so that at least a portion thereof overlaps with a projection area of one or more of the plurality of electronic components 61 on one end surface of the substrate body 60 . Specifically, a partial region or the entire region of one of the nine slits 71 overlaps with the projection region of one or more electronic components 61 . Among the nine slits 71, there may be a slit 71 that does not substantially overlap the projection area of any electronic component 61.

In FIG. 4, for easy understanding, the area of the slit 71 that is directly visible from the front of the first end surface 60A is shown with dark dot hatching, and the area that is hidden behind the electronic component 61 and cannot be seen directly is shown with light dot hatching. In other words, this means that the area of the slit 71 indicated by the thin dot hatch is an area that overlaps with the corresponding projection area of one or more electronic components 61 .

The board body 60 includes one or more specific circuit regions R1 (see FIG. 4). In the illustrated example, the number of specific circuit regions R1 is seven (referred to as first to seventh specific regions R11 to R17). In FIG. 4, the first to seventh specific regions R11 to R17 are shown surrounded by a substantially rectangular frame when the substrate main body 60 is viewed from the front. These approximately rectangular frames are illustrated to make it easy to intuitively understand the position of each specific circuit region R1, and are not illustrated to strictly indicate the range of each specific circuit region R1. do not have. In this embodiment, nine slits 71 are arranged to correspond to the first to seventh specific regions R11 to R17.

The specific circuit region R1 is a region in which it is not desired that liquid enter from surrounding regions. For example, if the surrounding area is a high-potential circuit area and the specific circuit area R1 is a low-potential circuit area, liquid enters the low-potential circuit area (specific circuit area R1) from the high-potential circuit area. This may cause a short circuit and cause abnormalities such as heat generation. Furthermore, even if the surrounding area is a circuit area with a low potential and the specific circuit area R1 is a circuit area with a high potential, liquid may flow from the low potential circuit area to the high potential circuit area (specific circuit area R1). If it enters, it may cause a short circuit and cause abnormalities such as heat generation. Conversely, if liquid moves within a low-potential circuit area and causes a short circuit, the circuit may not function properly, but it is unlikely to cause abnormalities such as heat generation. . Therefore, assuming a situation in which liquid flows over one end surface of the substrate body 60 due to its own weight, we identified the position and range where there is a high possibility that abnormalities such as heat generation will occur if a short circuit occurs, and The position and range of circuit region R1 are set.

The vertical orientation of the board main body 60 shown in FIG. 4 is the same as the vertical orientation when the lighting device X1 (display device B1) is actually installed in the facility.

Here, before explaining the liquid control section 7 in more detail, the power supply circuit E1 constituted by a plurality of electronic components 61 mounted on the substrate body 60 will be explained. The circuit configuration itself of the power supply circuit E1 may be a conventionally well-known circuit configuration, and therefore, detailed explanation of the circuit configuration and operation will be omitted.

<Circuit configuration of power supply circuit>
The power supply circuit E1 includes a protection circuit, a filter circuit, a rectifier circuit, a smoothing capacitor C2 (electrolytic capacitor: see FIG. 4), a regular lighting circuit, an emergency lighting circuit, a charging circuit, a control circuit, a power outage detection section, and the like.

The protection circuit is arranged in the electric path between the power supply side connector section 62 and the filter circuit, and includes a Zener diode ZD1 (surge absorption element: see FIG. 4) as one of the electronic components 61.

The filter circuit is configured to remove harmonic noise from an alternating voltage or an alternating current supplied from a common power source (for example, a commercial power system). The filter circuit includes a first filter LF1 (common mode choke coil), a capacitor C1, a second filter LF2 (common mode choke coil), and the like (see FIG. 4).

The rectifier circuit is placed after the filter circuit. The rectifier circuit includes a diode bridge DB1 (see FIG. 4), and performs full-wave rectification of an alternating current voltage (for example, a sine wave voltage with a frequency of 50 Hz or 60 Hz and an effective value of 100 V) input from a commercial power source. Smoothing capacitor C2 smoothes the ripple voltage output from the rectifier circuit.

The regular lighting circuit is a power supply circuit that supplies power to the light source (LED 300) during regular use when the regular power source is not out of power. The regular lighting circuit includes, for example, a switching power supply circuit including a transformer T1 (see FIG. 4), a switching element, a diode, and a smoothing capacitor, a so-called isolated flyback converter, and a converter control circuit that controls switching of the switching element. . The DC voltage smoothed by the smoothing capacitor C2 is input to the regular lighting circuit. The regular lighting circuit performs feedback control on the switching element (for example, pulse width modulation control) so that the current flowing through the light source (LED 300) matches a target value.

The charging circuit includes, for example, a switching power supply circuit including a transformer T1, a switching element, a diode, and a smoothing capacitor, and a so-called isolated flyback converter. However, the charging circuit shares a part of the transformer T1 and the switching element with the regular lighting circuit. The charging circuit has a constant current circuit. The constant current circuit causes a constant charging current to flow through the battery unit 13. The battery unit 13 is charged by a charging current supplied from a constant current circuit during normal use when the regular power source is not out of power.

The emergency lighting circuit is configured to light the LED 300 with power supplied from the battery unit 13 during a power outage of the regular power supply (in an emergency). The emergency lighting circuit includes, for example, a flyback converter including a transformer and a switching element, and a converter control circuit that controls the switching of the switching element, and boosts or steps down the DC voltage supplied from the battery unit 13 and outputs it. do. However, the emergency lighting circuit may include a forward converter instead of the flyback converter.

The control circuit includes a microcontroller. The control circuit determines whether or not there is a power outage in the regular power supply based on the detection signal received from the power outage detection section. The power failure detection section includes, for example, a Zener diode and a resistor. The power failure detection section is electrically connected to the output end of the charging circuit. If the signal level of the detection signal is, for example, a high level, the control circuit determines that there is no power outage in the regular power supply and operates in the regular operation mode. On the other hand, if the signal level of the detection signal is, for example, a low level, the control circuit determines that the regular power supply is out of power and operates in an emergency operation mode.

In the normal operation mode, the control circuit operates the normal lighting circuit and the charging circuit, and maintains the emergency lighting circuit in a stopped state. Thus, the LED 300 is turned on by the regular lighting circuit (regular lighting), and the battery unit 13 is charged by the charging circuit.

Further, the control circuit operates the emergency lighting circuit in the emergency operation mode. Note that the regular lighting circuit and the charging circuit enter a stopped state when power supply from the regular power source is stopped. The LED 300 is then turned on (emergency lighting) by the emergency lighting circuit.

<Overall arrangement of liquid control unit>
A power supply side connector section 62 (one of the electronic components 61) into which AC power is input from a common power supply is arranged at the upper left end of the mounting board 6. Therefore, a plurality of electronic components 61 constituting a protection circuit, a filter circuit, and a rectifier circuit in the power supply circuit E1 are arranged approximately in the upper half of the substrate body 60 in the vertical direction. The transformer T1 of the regular lighting circuit is arranged approximately at the center of the mounting board 6. As a result, the first to seventh specific regions R11 to R17 are also set to some extent concentrated in the upper half of the substrate body 60 in the vertical direction (particularly on the left side).

Further, a connection terminal 63 (one of the electronic components 61) to which a terminal of the battery unit 13 is connected is arranged at the lower left end portion of the mounting board 6. Therefore, the plurality of electronic components 61 constituting the above-described charging circuit are arranged approximately in the lower half of the board body 60 in the vertical direction. Further, a plurality of electronic components 61 constituting the control circuit and the emergency lighting circuit are arranged near the right end of the board body 60. Note that the light source side connector portion 64 (one of the electronic components 61) to which the connector of the electric wire connected to the connector 14 is connected is arranged at the upper right end portion of the mounting board 6.

The charging circuit, control circuit, emergency lighting circuit, and regular lighting circuit (excluding the primary side of transformer T1) have a relatively low voltage compared to the protection circuit, filter circuit, rectifier circuit, and primary side of transformer T1. can be applied. Hereinafter, the circuit area including the protection circuit, filter circuit, rectifier circuit, and primary side of the transformer T1 will be referred to as a "high voltage area." Further, a circuit area including a charging circuit, a control circuit, an emergency lighting circuit, and a regular lighting circuit (excluding the primary side of the transformer T1) is referred to as a "low voltage area."

The first to seventh specific regions R11 to R17 are set intensively within the high voltage region, and the liquid control section 7 (nine slits 71) is provided accordingly. As a result, first of all, the possibility that liquid will be transmitted from a high voltage area to a low voltage area or from a low voltage area to a high voltage area and a short circuit will occur in the entire area of the mounting board 6 is reduced. As described above, the vertical orientation of the substrate main body 60 shown in FIG. 4 is the same as the vertical orientation when the lighting device X1 is actually installed in the facility, and the high voltage region is located approximately in the upper half. Therefore, by providing the liquid control section 7, it is possible to reduce the possibility that a short circuit will occur mainly due to the liquid being transmitted from the high voltage area to the low voltage area due to its own weight.

<Arrangement of individual liquid control units>
Next, a description will be given focusing on each of the nine slits 71 (hereinafter sometimes referred to as first to ninth slits 711 to 719).

The first specific region R11 is a region including a terminal on the low potential side of the Zener diode ZD1 and a junction to which the terminal is joined. The first slit 711 is a hole having an elongated opening in the left-right direction, and is a hole that connects the first circuit region on the high potential side and the second circuit region on the low potential side (first specific region R11) of the Zener diode ZD1. ) is located between. The first circuit region and the second circuit region of the Zener diode ZD1 are arranged vertically.

In other words, a specific electronic component 61 (Zener diode ZD1) among the plurality of electronic components 61 includes a first terminal (on a high potential side) and a second terminal on a lower potential side than the first terminal. The specific circuit region R1 (first specific region R11) includes a second bonding portion (land) to which the second terminal is bonded. At least a portion (first slit 711) of the liquid control section 7 is connected to a first bonding portion (land) to which the first terminal of the specific electronic component 61 is bonded, and a first bonding portion (land) on one end surface of the substrate body 60. It is located between the two joints.

The Zener diode ZD1 is, for example, a lead type component, and joint portions (first and second joint portions) to which the lead terminals are joined are located on the second end surface 60B (back surface) side of the substrate body 60.

The first slit 711 controls the movement of the liquid so that the liquid bypasses the second circuit region (first specific region R11) on the low potential side of the Zener diode ZD1. In short, the substrate main body 60 includes a first circuit region and a second circuit region in the circuit region including the Zener diode ZD1. The first circuit region is a region with a higher potential than the second circuit region. The specific circuit area R1 is a second circuit area. The liquid control unit 7 controls the movement of the liquid so that the liquid bypasses the specific circuit region R1 (first specific region R11). Therefore, in the circuit region including the Zener diode ZD1, the occurrence of short circuits due to movement of liquid from the first circuit region to the second circuit region is reduced.

The second specific region R12 is a region including the low potential side terminal of the capacitor C1 of the filter circuit and the joint portion to which the terminal is joined. The second slit 712 is a hole having an elongated opening in the left-right direction, and includes a first circuit region on the high potential side and a second circuit region (second specific region R12) on the low potential side of the capacitor C1. is located between. The first circuit area and the second circuit area of the capacitor C1 are arranged vertically.

In other words, a specific electronic component 61 (capacitor C1) among the plurality of electronic components 61 includes a first terminal (on a high potential side) and a second terminal on a lower potential side than the first terminal. The specific circuit region R1 (second specific region R12) includes a second bonding portion (land) to which the second terminal is bonded. At least a portion (second slit 712) of the liquid control section 7 is connected to a first bonding portion (land) to which the first terminal of the specific electronic component 61 is bonded, and a first bonding portion (land) on one end surface of the substrate body 60. It is located between the two joints.

The capacitor C1 is, for example, a lead type component, and joint portions (first and second joint portions) to which the lead terminals are joined are located on the second end surface 60B (back surface) side of the substrate body 60.

The second slit 712 controls the movement of the liquid so that the liquid bypasses the second circuit region (second specific region R12) on the low potential side of the capacitor C1. In short, the substrate main body 60 includes a first circuit area and a second circuit area in the circuit area including the capacitor C1. The first circuit region is a region with a higher potential than the second circuit region. The specific circuit area R1 is a second circuit area. The liquid control unit 7 controls the movement of the liquid so that the liquid bypasses the specific circuit region R1 (second specific region R12). Therefore, in the circuit region including the capacitor C1, the occurrence of short circuits due to movement of liquid from the first circuit region to the second circuit region is reduced.

The third specific region R13 is a region including the output terminal of the secondary side (low potential side) winding of the second filter LF2 of the filter circuit and the joint portion to which the output terminal is joined. Further, the third specific region R13 further includes a low potential side input terminal of the diode bridge DB1 and a junction portion to which the input terminal is joined.

The third slit 713 is a hole having an elongated opening in the left-right direction, and connects the first circuit area on the high potential side including the output terminal of the primary winding of the second filter LF2, and the first circuit area on the secondary side of the second filter LF2. It is arranged between the second circuit region (third specific region R13) on the low potential side including the output terminal of the winding. The first circuit area and the second circuit area of the second filter LF2 are arranged vertically.

Further, the third slit 713 connects the first circuit region including the high potential side input terminal of the diode bridge DB1 and the second circuit region (third specific region R13) including the low potential side input terminal. It is also placed in between. The first circuit area (on the input side) and the second circuit area of the diode bridge DB1 are arranged vertically.

In other words, a specific electronic component 61 (second filter LF2, diode bridge DB1) among the plurality of electronic components 61 has a first terminal (on the high potential side) and a second terminal on the lower potential side than the first terminal. including terminals. The specific circuit region R1 (third specific region R13) includes a second bonding portion (land, pad) to which the second terminal is bonded. At least a part of the liquid control section 7 (the third slit 713) is connected to a first joint part (land, pad) to which the first terminal of the specific electronic component 61 is joined on one end surface of the substrate body 60. , and the second joint portion.

The second filter LF2 is, for example, a lead type component, and joint portions (first and second joint portions) to which the lead terminals are joined are located on the second end surface 60B (back surface) side of the substrate body 60. On the other hand, the diode bridge DB1 is, for example, a chip-type component, and is surface-mounted on the second end surface 60B (back surface) side of the substrate body 60. That is, the joint portions (first and second joint portions) to which the terminals of the diode bridge DB1 are joined are provided on the second end surface 60B (back surface).

The third slit 713 controls the movement of the liquid so that the liquid bypasses the second filter LF2 and the second circuit region (third specific region R13) on the low potential side of the diode bridge DB1. In short, the substrate main body 60 includes a first circuit region and a second circuit region in the circuit region including the second filter LF2 and the diode bridge DB1. The first circuit region is a region with a higher potential than the second circuit region. The specific circuit area R1 is a second circuit area. The liquid control unit 7 controls the movement of the liquid so that the liquid bypasses the specific circuit region R1 (third specific region R13). Therefore, in the circuit region including the second filter LF2 and the diode bridge DB1, the occurrence of short circuits due to movement of liquid from the first circuit region to the second circuit region is reduced.

The fourth specific region R14 is a region including the low potential side output terminal of the diode bridge DB1 and a junction portion to which the output terminal is joined. The fourth slit 714 is a hole having an elongated opening in the left-right direction, and is a hole that has an elongated opening in the left-right direction. It is arranged between the circuit area (fourth specific area R14). The first circuit area (on the output side) and the second circuit area of the diode bridge DB1 are arranged vertically.

In other words, a specific electronic component 61 (diode bridge DB1) among the plurality of electronic components 61 includes a first terminal (on a high potential side) and a second terminal on a lower potential side than the first terminal. The specific circuit region R1 (fourth specific region R14) includes a second bonding portion (pad) to which the second terminal is bonded. At least a part of the liquid control section 7 (the fourth slit 714) is connected to a first joint part (pad) to which the first terminal of the particular electronic component 61 is joined, on one end surface of the substrate body 60, and a first joint part (pad) to which the first terminal of the particular electronic component 61 is joined. It is located between the two joints.

The fourth slit 714 controls the movement of the liquid so that the liquid bypasses the second circuit region (fourth specific region R14) on the low potential side of the diode bridge DB1. In short, the substrate main body 60 includes a first circuit area and a second circuit area in the circuit area including the diode bridge DB1. The first circuit region is a region with a higher potential than the second circuit region. The specific circuit area R1 is a second circuit area. The liquid control unit 7 controls the movement of the liquid so that the liquid bypasses the specific circuit region R1 (fourth specific region R14). Therefore, in the circuit region including the diode bridge DB1, the occurrence of short circuits due to movement of liquid from the first circuit region to the second circuit region is reduced.

The fifth specific region R15 is a region for the smoothing capacitor C2. As shown in FIG. 5, the smoothing capacitor C2 is, for example, a lead type component, and has a first terminal 611 (lead terminal) and a second terminal 612 (lead terminal). The first terminal 611 is a terminal on the high potential side, and is bonded to the first bonding portion P1 (land) (see FIG. 5). The second terminal 612 is a terminal on the low potential side, and is connected to the second joint P2 (land) (see FIG. 5).

The fifth specific region R15 is a region including the first terminal 611 on the high potential side of the smoothing capacitor C2 and the first joint P1 to which the first terminal 611 is joined. The fifth slit 715 is a hole having a substantially U-shaped opening with an open left side when viewed from the front. The fifth slit 715 is arranged to surround the fifth specific region R15. The fifth slit 715 is a connection extending in the vertical direction to connect an upper hole portion 715A and a lower hole portion 715B (see FIG. 5), each extending in the left-right direction, and the upper hole portion 715A and lower hole portion 715B. including a hole. The upper hole portion 715A, the lower hole portion 715B, and the connecting hole portion communicate with each other and constitute one hole (slit). As a result, a part of the fifth slit 715 (preparatory hole part 715B) is connected to the first circuit area (fifth specific area R15) including the first terminal 611 on the high potential side of the smoothing capacitor C2 and the low potential side. and a second circuit area including the second terminal 612 of.

In other words, a specific electronic component 61 (smoothing capacitor C2) among the plurality of electronic components 61 has a first terminal 611 (on the high potential side) and a second terminal 612 on the lower potential side than the first terminal 611. including. The specific circuit region R1 (fifth specific region R15) includes a first joint portion P1 to which the first terminal 611 is joined. At least a portion of the liquid control section 7 (the lower hole section 715B of the fifth slit 715) connects the first joint P1 and the second joint P2 of the specific electronic component 61 on one end surface of the substrate body 60. is placed between.

The fifth slit 715 controls the movement of the liquid so that the liquid bypasses the first circuit region (fifth specific region R15) on the high potential side of the smoothing capacitor C2. In short, the substrate main body 60 includes a first circuit area and a second circuit area in the circuit area including the smoothing capacitor C2. The first circuit region is a region with a higher potential than the second circuit region. The specific circuit region R1 is a first circuit region. The liquid control unit 7 controls the movement of the liquid so that the liquid bypasses the specific circuit region R1 (fifth specific region R15). Therefore, in the circuit region including the smoothing capacitor C2, the occurrence of short circuits due to movement of liquid from the first circuit region to the second circuit region is reduced.

In particular, the fifth slit 715 is formed to surround the first circuit area of the smoothing capacitor C2. Therefore, not only the liquid moves from the first circuit area to the second circuit area of the smoothing capacitor C2, but also the liquid moves from the fourth specific area R14 above the smoothing capacitor C2 to the first circuit area of the smoothing capacitor C2. Liquid movement may also be inhibited.

The sixth specific area R16 and the seventh specific area R17 are terminals of a plurality of windings on the secondary side (low potential side) of the transformer T1 that is shared by the regular lighting circuit and the charging circuit, and the junction where the terminals are connected. This is an area that includes the section. The seventh to ninth slits 717 to 719 are holes having vertically elongated openings. The sixth slit 716 is also a hole having an elongated opening in the vertical direction, but the opening extends at an angle with respect to the vertical direction in the middle, and is formed in a generally crank shape as a whole.

The sixth to ninth slits 716 to 719 are arranged so as to surround the terminals of the plurality of windings on the primary side (high potential side) of the transformer T1 and the joint portion where the terminals are joined.

Specifically, the sixth slit 716 and the eighth slit 718 are arranged on both left and right sides of the plurality of windings on the primary side of the transformer T1. The ninth slit 719 is arranged between the plurality of windings on the primary side of the transformer T1. The seventh slit 717 is arranged directly above the ninth slit 719.

By providing the sixth to ninth slits 716 to 719, when liquid (for example, dew condensation water) flows downward on the mounting board 6 due to its own weight, it is possible to avoid any of the sixth to ninth slits 716 to 719. Movement can be controlled by Therefore, the liquid moves from the first circuit region on the high potential side of the transformer T1 to the second circuit region (sixth specific region R16 or seventh specific region R17) on the low potential side, causing a short circuit. The possibility is reduced.

Incidentally, as the length, width, and number of slits 71 are increased, the effect of suppressing short circuits is improved, but the strength of the mounting board 6 may be reduced. Therefore, in the mounting board 6 of this embodiment, the length, width, and number of slits 71 are suppressed to some extent, and are set so that short circuits can be suppressed. In particular, in accordance with the size of the relatively large transformer T1 placed approximately in the center of the mounting board 6, it is possible to provide a slit 71 that extends long in the left-right direction, provide a wide slit 71, or increase the number of slits 71. Then, there is a high possibility that the strength of the entire mounting board 6 will decrease. The length, width, and number of the sixth to ninth slits 716 to 719 are set to be suppressed in consideration of the overall strength of the mounting board 6.

A broken line arrow LQ1 shown in FIG. 4 indicates that liquid (for example, condensed water) flows down the mounting board 6 (either on the first end surface 60A or the second end surface 60B) from the upper end to the lower end of the mounting board 6 due to its own weight. At this time, an example of the assumed path through which the liquid flows is shown. From this arrow LQ1, it can be easily understood that the movement of the liquid is controlled by the fourth slit 714 and the fifth slit 715. That is, the liquid is adsorbed by surface tension to the periphery of the opening in each of the fourth slit 714 and the fifth slit 715, and falls along the periphery. As a result, the liquid falls so as to bypass the fourth specific region R14 and the fifth specific region R15 located directly below the fourth slit 714 and the fifth slit 715. Therefore, the occurrence of short circuits can be suppressed.

(3) Advantages of the mounting board according to the embodiment When the lighting device X1 is installed in a facility as indoor lighting, for example, dew condensation may occur within the lighting device X1. Therefore, for example, a situation may occur in which condensed water flows over one end surface (first end surface 60A or second end surface 60B) of the substrate main body 60 due to its own weight. As described above, in this embodiment, the liquid control section 7 is provided in the substrate main body 60, so that the movement (for example, the traveling direction) of the liquid such as dew condensation water is controlled by the liquid control section 7. In particular, the possibility that a short circuit will occur due to movement of liquid such as dew water to the specific circuit region R1 is reduced. As a result, the mounting board 6 of this embodiment has the advantage that electrical reliability can be improved with a simple configuration. That is, tracking resistance can also be improved.

Moreover, compared to the circuit board of Patent Document 1 mentioned above, the mounting board 6 can reduce costs and improve tracking resistance (electrical reliability). Moreover, compared to the circuit board of Patent Document 1 mentioned above, the mounting board 6 can suppress abnormalities such as heat generation in the entire circuit area including wiring patterns and the like.

Furthermore, in this embodiment, the movement of the liquid is controlled by providing one or more (nine in the illustrated example) slits 71 as the liquid control unit 7, so that electrical reliability is improved with a simpler configuration. can be achieved. In particular, since the slit 71 penetrates the substrate body 60 in the thickness direction, one slit 71 prevents the occurrence of a short circuit for the liquid flowing on either the first end surface 60A or the second end surface 60B. Can be reduced.

Furthermore, at least a portion of each of the first to fifth slits 711 to 715 is connected to a first joint portion and a second joint portion (in FIG. 5, a first joint portion It is arranged between the part P1 and the second joint part P2). Therefore, the occurrence of short circuits due to liquid moving from the first joint to the second joint (or from the second joint to the first joint) is reduced.

In addition, the first to seventh specific regions R11 to R17 are set intensively within the high voltage region (region on the left side of the upper half of FIG. 4), and the liquid control section 7 (nine slits 71) is set accordingly. It is set up. Therefore, even when looking at the entire area of the mounting board 6, the possibility that liquid will be transmitted from a high voltage area to a low voltage area (or from a low voltage area to a high voltage area) and a short circuit will occur is reduced.

(4) Modification Examples Modification examples of the mounting board 6 according to the embodiment described above are listed below. The embodiments described above and the plurality of modified examples described below may be combined with each other as appropriate.

In the embodiment described above, the number of slits 71 is nine, but is not limited to nine. However, if the number of slits 71 increases too much, the strength of the mounting board 6 may decrease, so the number of slits 71 is preferably in the range of 1 to 10.

In the embodiment described above, each slit 71 has a substantially constant width. At least one slit 71 may not have a constant width, but may be formed so that the width gradually increases in one direction, for example.

In the embodiment described above, the liquid control section 7 includes one or more slits 71. The liquid control unit 7 has one or more grooves 72 (see FIG. 6A) recessed in one end surface (first end surface 60A or second end surface 60B) of the substrate body 60 instead of or in addition to the one or more slits 71. ) may be included. Similar to FIG. 5, FIG. 6A illustrates a smoothing capacitor C2. In the example of FIG. 6A, a groove 72 is formed in the second end surface 60B instead of the fifth slit 715 of FIG. The shape, length, and width of the groove 72 in a front view are assumed to be the same as, for example, the fifth slit 715, but are not particularly limited. Further, the depth of the groove 72 is assumed to be, for example, about half the thickness of the substrate main body 60, but is not particularly limited. Other slits (711 to 714, 716 to 719) other than the fifth slit 715 may also be replaced with the grooves 72.

Even when the groove 72 is provided in the substrate body 60 as the liquid control section 7 in this manner, the movement of the liquid flowing on the second end surface 60B is controlled, so that the occurrence of short circuits can be reduced. As a result, electrical reliability can be improved with a simpler configuration. In order to reduce the occurrence of short circuits in the liquid flowing on the first end surface 60A, the groove 72 may be provided on the first end surface 60A.

Alternatively, the liquid control unit 7 may include one or more water absorbing members 73 (see FIG. 6B) having a water absorbing function. Similarly to FIG. 5, the smoothing capacitor C2 is also illustrated in FIG. 6B. In the example of FIG. 6B, a sheet-like water absorbing member 73 is stuck on the second end surface 60B instead of the fifth slit 715 of FIG. The material of the water-absorbing member 73 is not particularly limited as long as it has a water-absorbing function, but a flame-retardant material is preferable, and for example, a glass fiber material such as glass wool, or a flame-retardant silicone sponge is assumed. The shape, length, and width of the water absorbing member 73 in a front view are assumed to be the same as, for example, the fifth slit 715, but are not particularly limited. The thickness of the water absorbing member 73 is assumed to be, for example, about half the thickness of the substrate main body 60, but is not particularly limited. Other slits (711 to 714, 716 to 719) other than the fifth slit 715 may also be replaced with the water absorbing member 73.

Even when the water absorbing member 73 is provided on the substrate main body 60 as the liquid control section 7 in this manner, the movement of the liquid flowing on the second end surface 60B is controlled, so that the occurrence of short circuits can be reduced. As a result, electrical reliability can be improved with a simpler configuration. In particular, in the slits 71 and grooves 72, "controlling the movement of the liquid" meant changing the direction of movement of the liquid. In the water absorbing member 73, "controlling the movement of liquid" may mean absorbing (capturing) liquid with the water absorbing member 73 to reduce the amount of liquid movement, or to stop the movement of the liquid. In order to reduce the occurrence of short circuits in the liquid flowing on the first end surface 60A, the water absorbing member 73 may be provided on the first end surface 60A. Further, the water absorbing member 73 may be embedded in the slit 71 or the groove 72.

The mounting board 6 may include two or more types of slits 71, grooves 72, and water absorbing members 73 as the liquid control section 7.

In the embodiment described above, the light source unit A1 includes one light emitting section. However, for example, the light source unit A1 may include two light emitting parts. The two light emitting parts may be arranged one at each end of the light guide 5 in the longitudinal direction.

In the embodiment described above, the display device B1 is a so-called single-sided display device in which the display block 2 is attached only to the front surface of the main body 1, and the display device B1 is installed with the rear surface of the main body 1 facing the wall surface of the structure. However, for example, the display device B1 may be a so-called double-sided display device in which the display blocks 2 are attached to both the front and rear surfaces of the main body 1, respectively.

(summary)
The following aspects are disclosed from the embodiments described above.

The mounting board (6) according to the first aspect includes a board body (60) and a liquid control section (7). The board body (60) has a plurality of electronic components (61) mounted thereon and includes a specific circuit region (R1). The liquid control section (7) is provided on the substrate body (60). The liquid control unit (7) moves toward a specific circuit region (R1) under a situation in which the liquid flows on one end surface (first end surface 60A or second end surface 60B) of the substrate body (60) due to its own weight. Control the movement of liquid.

According to the above aspect, since the movement of the liquid is controlled by the liquid control unit (7), the possibility that a short circuit will occur due to movement of the liquid (condensed water, etc.) to the specific circuit area (R1) is reduced. be done. As a result, the mounting board (6) has the advantage that electrical reliability can be improved with a simple configuration.

Regarding the mounting substrate (6) according to the second aspect, in the first aspect, the liquid control section (7) includes one or more slits (71) that penetrate the substrate body (60) in the thickness direction.

According to the above aspect, the movement of the liquid is controlled by providing the slit (71), so electrical reliability can be improved with a simpler configuration.

Regarding the mounting board (6) according to the third aspect, in the first or second aspect, the liquid control section (7) is attached to one end surface (the first end surface 60A or the second end surface 60B) of the substrate body (60). It includes one or more recessed grooves (72).

According to the above aspect, since the movement of the liquid is controlled by providing the groove (72), electrical reliability can be improved with a simpler configuration.

Regarding the mounting board (6) according to the fourth aspect, in any one of the first to third aspects, the liquid control section (7) includes one or more water absorbing members (73) having a water absorbing function. )including.

According to the above aspect, the movement of the liquid is controlled by providing the water absorbing member (73), so electrical reliability can be improved with a simpler configuration.

Regarding the mounting board (6) according to the fifth aspect, in any one of the first to fourth aspects, the board body (60) includes a first circuit area and a second circuit area. The first circuit region is a region with a higher potential than the second circuit region. The specific circuit area (R1) is a first circuit area or a second circuit area. The liquid control section (7) controls the movement of the liquid so that the liquid bypasses a specific circuit region (R1).

According to the above aspect, the occurrence of short circuits caused by movement of the liquid from a high potential region to a low potential region (or from a low potential region to a high potential region) is reduced.

Regarding the mounting board (6) according to the sixth aspect, in any one of the first to fifth aspects, a specific electronic component (61) among the plurality of electronic components (61) is connected to the first terminal ( 611), and a second terminal (612) that is on the lower potential side than the first terminal (611). The specific circuit region (R1) includes a first joint part (P1) to which the first terminal (611) is joined, or a second joint part (P2) to which the second terminal (612) is joined. At least a portion of the liquid control section (7) is arranged between the first joint section (P1) and the second joint section (P2) on one end surface of the substrate body (60).

According to the above aspect, a short circuit occurs due to the liquid moving from the first joint (P1) to the second joint (P2) or from the second joint (P2) to the first joint (P1). is reduced.

Regarding the mounting board (6) according to the seventh aspect, in any one of the first to sixth aspects, at least a part of the liquid control section (7) is located on one end surface of the substrate body (60). It is provided so as to overlap the projection area of one or more electronic components (61) among the plurality of electronic components (61).

According to the above aspect, the occurrence of short circuits around the circuit area where the electronic component (61) is mounted is reduced.

The power supply device (11) according to the eighth aspect includes the mounting board (6) according to any one of the first to seventh aspects. A plurality of electronic components (61) mounted on the board body (60) constitute a power supply circuit (E1) that generates power to be supplied to a load (L1).

According to the above aspect, it is possible to provide a power supply device (11) that has a simple configuration and can improve electrical reliability.

The lighting device (X1) according to the ninth aspect includes the power supply device (11) according to the eighth aspect, a light source unit (A1), and a main body (1). The light source unit (A1) is a load (L1), and is lit by being supplied with power from the power supply device (11). The main body (1) houses or holds a power supply device (11) and a light source unit (A1).

According to the above aspect, it is possible to provide a lighting device (X1) with a simple configuration and improved electrical reliability.

The configurations according to the second to seventh aspects are not essential to the mounting board (6) and can be omitted as appropriate.

A1 Light source unit 1 Main body 11 Power supply device 6 Mounting board 60 Board main body 61 Electronic component 611 First terminal 612 Second terminal 7 Liquid control section 71 Slit 72 Groove 73 Water absorption member E1 Power supply circuit L1 Load P1 First joint P2 Second joint Section R1 Specific circuit area X1 Lighting device

Claims (9)

A board body on which multiple electronic components are mounted and includes a specific circuit area;
a liquid control unit that is provided on the substrate body and controls movement of the liquid toward the specific circuit area under a situation where the liquid flows on one end surface of the substrate body due to its own weight;
Equipped with
Mounting board. The liquid control section includes one or more slits that penetrate the substrate main body in the thickness direction.
The mounting board according to claim 1. The liquid control section includes one or more grooves recessed in the one end surface of the substrate main body.
The mounting board according to claim 1. The liquid control unit includes one or more water absorbing members having a water absorbing function.
The mounting board according to claim 1. The board body includes a first circuit area and a second circuit area,
The first circuit region is a region with a higher potential than the second circuit region,
The specific circuit area is the first circuit area or the second circuit area,
The liquid control unit controls movement of the liquid so that the liquid bypasses the specific circuit area.
The mounting board according to any one of claims 1 to 4. A specific electronic component among the plurality of electronic components includes a first terminal and a second terminal that is on a lower potential side than the first terminal,
The specific circuit area includes a first joint part to which the first terminal is joined, or a second joint part to which the second terminal is joined,
At least a portion of the liquid control section is disposed between the first joint section and the second joint section on the one end surface of the substrate main body.
The mounting board according to any one of claims 1 to 4. The liquid control unit is provided so that at least a portion thereof overlaps a projection area of one or more of the plurality of electronic components on the one end surface of the substrate main body.
The mounting board according to any one of claims 1 to 4. A power supply device comprising the mounting board according to any one of claims 1 to 4,
The plurality of electronic components mounted on the substrate body constitute a power supply circuit that generates power to be supplied to a load.
power supply. A power supply device according to claim 8;
a light source unit that is the load and lights up when the power is supplied from the power supply device;
a main body that houses or holds the power supply device and the light source unit;
Equipped with
lighting equipment.

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