JP2017098437A - Electronic apparatus and electric power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of secure waterproofness in a low cost.SOLUTION: Sealability of an inner part of a casing is ensured by connecting an upper lid unit 30 and a shell 11 without a space by coupling them while intervening a packing 60 to one end. A fixing member 70 of the lowest part of the upper lid unit 30 is constructed so that a first substrate 100 having a connector 106 is fixed to a bottom surface, and a cap fixed groove 72 is formed on a position surrounding the connector 106. Members 60, 50, and 40 overlapped on the fixing member 70 open in which the position corresponding to the cap fixed groove 72 is punched. A cap 32 is fitted to the opening, a thread of the cap 32 is coupled and screwed with/into the cap fixed groove 72 are engaged, an annular projection provided to the cap 32 is made to bite by the packing 60, and thereby, high watertightness can be ensured by intensity fixing the cap 32 to the opening of the upper lid unit 30.SELECTED DRAWING: Figure 10

Description

  The present invention relates to an electronic device having a waterproof structure, and a power supply device that supplies electric power to outdoor lighting such as road lights and tunnel lights.

  This type of electronic apparatus is suitable for a power supply device that is assumed to be installed outdoors, for example. That is, lighting fixtures represented by road lights, crime prevention lights, tunnel lights and the like installed outdoors are supplied with power from power supply devices stored in outdoor facilities such as utility poles and walls, and the light source (for example, LED) can be turned on. In addition, the lighting mode of the light source (for example, lighting time zone, illuminance, etc.) is generally set in advance according to the environment of the installation location, and when the power supply device is driven, the setting content is set. Based on this, lighting control is performed.

  For this reason, at least the output side cable for supplying electric power to the lighting fixture is connected to the power supply device together with the input side cable for securing the power supply. In addition, since the control content related to lighting of the lighting fixture is changed by connecting a device such as a computer to the electronic component housed in the power supply device from the outside, a connector serving as an interface between the electronic component and the external device Is also provided in an available state.

  As described above, the power supply device usually has a part of its casing opened for input / output to / from the outside and connection with equipment. Power supply devices installed in outdoor facilities are easily affected by weather such as wind and rain, and moisture. If water drops enter the power supply device, problems such as short-circuiting of electronic components occur and the power supply device can be driven normally. I can't. Therefore, when the outdoor use is assumed, an appropriate waterproof measure is required to prevent moisture from entering the power supply device through the opening.

  Here, there is known a power supply device that has a connector (port) for rewriting the drive control content of the power supply unit from the outside of the casing at the bottom of the casing and covers the connector with rubber packing to ensure waterproofness ( For example, see Patent Document 1).

JP 2013-254598 A

  In the known power supply device described above, it is considered that the waterproofness of the connector can be maintained if the cover by the rubber packing can be securely attached to the housing portion.

  However, this cover has a simple shape that only needs to be pushed into the opening of the housing part and does not have a sealing property against the opening. Therefore, if the surface of the rubber packing is worn or the push-in condition of the cover is weak, it is natural. When the cover is removed, the connector is exposed to the outside, and it becomes difficult to waterproof. In addition, in the known power supply device, since the connector is provided at the bottom of the casing, it is estimated that water is less likely to adhere than in the case where it is provided at other parts. If the adhered water reaches the bottom surface along the outer surface of the casing, the connector may get wet and cause a short circuit.

  In addition, there is a method using a waterproof connector, for example. In this case, in view of the fact that the use of the connector is limited to only a few times before the installation of the power supply device, after the use of the connector is completed, that is, after the connector is no longer needed, it is cut off so as not to interfere. To process. According to this method, the connector itself does not exist at the installation stage of the power supply device, so there is no fear of short circuit due to water wetting, but this method is expensive because the cost required to realize the waterproof structure of the waterproof connector is high. If it is adopted, there arises a problem that the manufacturing cost of the power supply device jumps.

  Therefore, an object of the present invention is to provide a technique that can ensure waterproofness at low cost.

  In order to solve the above problems, the present invention employs the following solutions.

  That is, the electronic device of the present invention includes an electronic circuit having an electronic component, and at least one end of the fuselage covered with a lid in a state where the electronic circuit is accommodated inside the cylindrical fuselage, and the lid and the fuselage. A seal member that is fastened in a direction in which the lid and the fuselage are in contact with each other, a seal member that exhibits waterproofness when the lid and the fuselage are fastened, and a lid and A connection port that is formed through the seal member and enables connection to the electronic component from the outside of the casing, and is fitted into the connection port from the outside of the lid, and the electronic component is concealed in this fitted state around the connection port. And a cap that exhibits waterproofness by being in close contact with the seal member.

  The electronic component provided in the electronic device is used when performing some operation from the outside. For example, when various adjustments to the electronic device are required, such as rewriting the control content of the electronic device, increasing / decreasing the amount of applied current / voltage, or changing the electrical specifications, the work is for adjusting external devices such as computers. Electronic components that are housed inside electronic devices (those that allow external adjustment operations on electronic devices) because they are connected to electronic components or directly operated by hand. ) Must be exposed to the outside. By providing a cap so that the connection port to the electronic component can be opened and closed, the electronic component can be used repeatedly as necessary. However, it is necessary to ensure the water tightness inside the electronic equipment in order to protect the electronic circuit from getting wet and avoid the occurrence of a short circuit, except in the case where the operation on the electronic component is necessary.

  If the electronic device according to the above-described aspect is arranged with the lid body provided with the cap facing upward, the lid body and the body are first fastened with the seal member interposed therebetween, thereby exhibiting waterproofness. Therefore, it is possible to prevent water from entering the casing from these joint portions. In addition, during rewriting work, the cap can be removed to expose the electronic component, and an external device for work can be connected to the electronic component through the connection port. It is possible to reliably maintain the waterproof property of the space where the electronic component is disposed by bringing the cap into close contact with the periphery.

  In addition, the electronic device is attached to a circuit board on which electronic components are mounted together with an electronic circuit, and a lid member with a sealing member interposed between the inner surface and an insertion port of a cap leading to a connection port. A fixing member that is formed through and that fixes the circuit board in a state in which the electronic component is received in the insertion port, and an annular shape that overlaps the periphery of the insertion port on the surface of the fixing member that faces the circuit board A double layer formed as a groove, the outer adhesive groove holds the sealing agent that adheres while waterproofing between the circuit board and the fixing member, while the inner protective groove prevents the sealing agent from flowing into the insertion port And a waterproof groove.

  The circuit board and the fixing member are bonded together by a sealing material, so that the space surrounded by both is waterproofed. The adhesive groove to which the sealing material is applied is formed so as to surround the periphery of the cap insertion opening in the fixing member, that is, the position where the electronic component is accommodated. At this time, the sealing material may overflow from the adhesive groove when the circuit board is pressed against the fixing member to adhere to the fixing member depending on the application condition of the sealing material applied to the adhesive groove (coating spots, overcoating, etc.). If the overflowing sealing material reaches the cap insertion opening toward the inside and adheres to a part thereof, the cap cannot be completely inserted into the insertion opening. As a result, it becomes difficult to ensure the waterproofness by the cap, and there is a risk that the electronic components arranged inside will be wetted and short-circuited.

  According to the above aspect, since the protective groove is further formed inside the adhesive groove to which the sealing material is applied, the sealing material is inward from the adhesive groove when the circuit board and the fixing member are bonded. Even if it overflows in the opposite direction, the protective groove can surely catch this. Therefore, it is possible to avoid the above-described problems that may occur when the sealing material flows into the cap insertion opening.

  The electronic device is further provided with a fastening means formed on both the cap and the fixing member and fastened to each other when the cap is fitted into the fitting opening, and the cap closely contacts the sealing member around the connection opening. An annular projection is provided.

  According to such an aspect, the cap can be securely fastened to the fixing member in a state where the protrusion provided on the cap pushes the sealing member into close contact with the sealing member, so that the cap is stronger than the fixing member. Sealed. Therefore, it is possible to further improve the water tightness in the arrangement space of the electronic component surrounded by the circuit board, the fixing member, and the cap.

Moreover, the power supply device of this invention waterproofs the inside of the casing of the electronic device by the aspect mentioned above by filling with sealing resin, and controls supply of electric power required for lighting of a lighting fixture by an electronic circuit.
By such an aspect, it becomes possible to ensure the waterproofness in a casing, to protect an electronic circuit from being wet, and to stably realize power supply to a lighting fixture.

  As described above, according to the electronic apparatus and the power supply device of the present invention, ensuring waterproofness can be realized at low cost.

It is a perspective view showing the power supply device of one Embodiment. It is a perspective view showing the state by which the trunk | drum of the casing was removed from the power supply device of one Embodiment. It is a perspective view showing the upper cover unit of one Embodiment. It is a disassembled perspective view showing the upper cover unit of one Embodiment. It is a top view showing the upper lid unit of one embodiment. It is a bottom view showing the upper lid unit of one embodiment. It is a figure explaining the adhesion | attachment aspect of the holding member and 1st board | substrate of one Embodiment. It is a perspective view showing the state which looked at the cap of one embodiment from the lower side. FIG. 6 is a vertical cross-sectional view (a cross-sectional view taken along line IX-IX in FIG. 5) showing a part of the upper lid unit of one embodiment. FIG. 6 is a vertical sectional view (a sectional view taken along line XX in FIG. 5) showing the power supply device of one embodiment. It is a front view showing the upper cover unit in a different embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate understanding of the invention, the expression on the drawing may include some exaggeration and deformation.

  FIG. 1 is a perspective view illustrating a power supply device 1 according to an embodiment. The power supply device 1 accommodates various electronic components (not shown in FIG. 1) in a casing 10 formed in a vertically long, substantially rectangular parallelepiped shape. Since the power supply device 1 is disposed in an outdoor environment, the casing 10 covering the outside is formed of a metal having high corrosion resistance such as aluminum. In addition, when the power supply device 1 is used as a power source for a road lamp, it is installed inside the support column, etc., so that a vertically long shape with a reduced width is adopted under such space restrictions. ing. In addition, such a power supply device 1 is an example of an electronic device having waterproofness.

  The casing 10 includes a cylindrical body 11 and two lid portions (a lower lid unit 20 and an upper lid unit 30), and has a rectangular parallelepiped shape as a whole. The body 11 has four sides of the rectangular parallelepiped, and the lid portions (the lower lid unit 20 and the upper lid unit 30) close both ends of the body 11 to form the upper and lower surfaces of the rectangular parallelepiped. The upper lid unit 30 is fastened and fixed by fastening members 12 to screw receiving holes (not shown) provided at the four corners of the upper end portion of the body 11, and the lower lid unit 20 is provided at the four corners of the lower end portion of the body 11. The open surfaces at both ends of the body 11 are closed by being fastened and fixed to the screw receiving holes (not shown) by the fastening members 22.

  The casing 10 is filled with a sealing resin (not shown) in a space formed between the inner surface of the casing 10 and the electronic component in a state where the electronic component is accommodated. The sealing resin is filled in a state where some space is left between the sealing resin 20 and the lower lid unit 20. Thereby, the electronic component can be protected in a watertight manner while closing and sealing the space inside the casing 10.

  A cap 32 is fitted into the upper lid unit 30. When the cap 32 is removed, a connector (not shown in FIG. 1) for externally connecting to the electronic component housed in the casing 10 is exposed from the opening. The cap 32 has a structure in consideration of hermeticity. The cap 32 is fitted into the upper lid unit 30 to prevent water from entering the power supply device 1 from above, and protects the connector and the electronic component from getting wet. ing.

  In this embodiment, a connector will be described as an example of an electronic component, but the present invention is not limited to this. For example, a potential meter that adjusts the amount of current and voltage, a switch that is used to change electrical specifications, and the like may be disposed at a position that is protected by the cap 32 as an electronic component. The structure of the cap 32 will be described later again.

FIG. 2 is a perspective view showing only the body 11 of the casing 10 at the previous stage in which the sealing resin is filled in order to show the internal structure of the power supply device 1.
The upper lid unit 30 is configured by combining a plurality of members. First, the upper lid outer plate 40 is disposed at the uppermost part to constitute the outer shell of the upper lid unit 30. Below that, an upper lid inner plate 50, a packing 60, and a fixing member 70 are arranged in an overlapping manner. The fixing member 70 located at the lowermost part of the upper lid unit 30 (innermost side of the casing 10 when viewed in the height direction) determines the arrangement position of the electronic components housed in the power supply device 1 and supports them, and Has the role of fixing. As shown in FIG. 2, the first substrate 100 is fixed to the fixing member 70 from the bottom surface side, the second substrate 110 is fixed from the back surface side, and the third substrate 120 is connected to the first substrate 100 and the second substrate 100. By being bonded to a predetermined position of the substrate 110, the substrates 100, 110, 120 are arranged at positions where they are combined at right angles to each other, and the substrates 100, 110, 120 are electrically connected. Here, the mounting components on each of the substrates 100, 110, and 120 are not shown (the same is applied thereafter). Further, the configuration of the upper lid unit 30 will be described in more detail later.

  The lower lid unit 20 is configured by superposing an insulating plate 28 on an upper surface of a lower lid outer plate 21 obtained by bending a stainless steel (SUS) metal plate. The lower lid outer plate 21 has a flat plate rectangular portion having metal perforations 26 opened at two locations and a portion bent 90 ° downward. The insulating plate 28 is closely overlapped with the upper surface of the flat rectangular portion of the lower lid outer plate 21. The insulating plate 28 is formed of an insulating resin such as polypropylene, for example, and has a cable hole 27 opened at a position corresponding to the metal perforation 26. The cable hole 27 has a shape bent downward from the inner periphery formed smaller than the metal perforation 26 so as to cover the inner peripheral surface of the metal perforation 26. Each of the metal perforations 26 and the cable holes 27 is an opening provided for passing a power supply cable or the like, for example. Since each metal perforation 26 is formed by perforating a metal plate, so-called metal burrs protrude from the edges. Therefore, in order to prevent the coating from being damaged due to the rubbing between the metal burr and the cable, the cable hole 27 is formed at a position corresponding to this in order to protect the edge of each metal perforation 26. An insulating plate 28 is provided.

FIG. 3 is a perspective view showing the upper lid unit 30. For convenience of explanation, in the following explanation, the first substrate 100 is also shown at the bottom of the figure shown as the upper lid unit 30. This is for facilitating understanding of the positional relationship between the upper lid unit 30 and the first substrate 100, and actually the first substrate 100 does not function as a part of the upper lid.
The upper lid unit 30 is composed of a plurality of members, and an upper lid outer plate 40, an upper lid inner plate 50, a packing 60, and a fixing member 70 are stacked in order from the top.

  The upper lid outer plate 40 has an upright portion in which a stainless steel (SUS) metal plate is bent 90 ° upward and its root is formed in a curved shape (so-called rounded shape), and the bottom surface is formed in a rectangular shape. The upper lid inner plate 50 is a stainless (SUS) metal plate that is formed in a flat rectangular shape as a whole, and is superposed under the upper lid outer plate 40 to reinforce the upper lid outer plate 40 at the bottom surface. A packing 60 is superimposed under the upper lid inner plate 50. The packing 60 is formed of a material such as elastic and translucent silicon rubber into a flat rectangular shape and has a size that can completely cover the open surface of the upper end of the body 11 (not shown in FIG. 3). doing.

  The upper lid outer plate 40, the upper lid inner plate 50, and the packing 60 have through holes 46 for passing fastening members (pan head screws) at the four corners thereof, and are inserted into the through holes 46 during the assembly process of the casing 10. The upper cover unit 30 is fixed to the body 11 by fastening the fastening members to the screw receiving holes provided at the upper four corners of the body 11. At this time, since the elastic packing 60 covers the open surface of the upper end of the body 11 and the metal upper cover inner plate 50 and the upper cover outer plate 40 are pressed from above, the upper cover unit 30 has a gap between the upper end of the body 11. Therefore, it is possible to prevent the water from entering from the joint portion with certainty.

  The fixing member 70 is a member formed of a resin such as polybutylene terephthalate (hereinafter abbreviated as “PBT”) disposed in close contact with the bottom surface of the packing 60, and positions the substrates 100, 110, 120. While doing this, these are supported and fixed. As shown in FIG. 3, for example, the first substrate 100 is fixed to the fixing member 70 by fastening the fastening member 102 from the bottom surface side. The fixing member 70 itself is fixed to the upper lid unit 30 by fastening the fastening member 34, and as a result, the fixing member 70 is also fixed to the casing 10.

As described above, when the cap 32 fitted in the upper lid unit 30 is removed, the connector (not shown in FIG. 3) is exposed from the cap through hole 42. Implemented in position. The position of the connector is determined by positioning and fixing the first board by the fixing member 70. As a result, the connector is arranged on a virtual line passing through the horizontal center points of the cap 32 and the cap through hole 42. The
Further, on the side surface of the fixing member 70, a grounding jig 200 for grounding (so-called FG) the electronic components provided on the respective substrates 100, 110, 120 to the casing 10 is fixed. The grounding jig 200 has a screw receiving hole 202 at the center of the side surface, and the screw receiving hole 202 is inserted into the grounding screw (see FIG. 3) from the outside after the casing 10 is assembled. (Not shown) is fastened.

  Three LED light transmitting holes 48 formed in the upper lid outer plate 40 make it possible to visually recognize light emitted from LED chips (not shown in FIG. 3) provided on the first substrate 100 from the outside of the power supply device 1. The LED chip is provided to inform the operating state and life cycle of the lighting device that the power supply device 1 controls the power supply. For example, an operation inspection performed before factory shipment, a maintenance inspection performed after installation, etc. At this stage, the person in charge can visually recognize the LED light transmitting hole 48 and take measures to be taken according to the lighting state.

FIG. 4 is an exploded perspective view showing the structure of the upper lid unit 30 in detail.
A fixing member 70 is disposed at the lowermost part of the upper lid unit 30. The fixing member 70 has screw receiving holes on the top surface, the bottom surface, and the side surface thereof, and fastens and fixes other constituent members from each direction.

  The first substrate 100 fixed to the bottom surface of the fixing member 70 has two through holes 104 through which the fastening member 102 for fastening itself to the fixing member 70 is passed. The fastening member 102 passed through the through hole 104 is received and fastened to a screw receiving hole (not shown) provided on the bottom surface of the fixing member 70. The first substrate 100 is provided with a connector 106 for connecting to an external device and an LED arrangement hole 108 for arranging an LED chip and an LED light source. The connector 106 can be connected from above the upper lid unit 30. In addition, the light emitted from the LED arrangement hole 108 needs to be visible from above the upper lid unit 30. Therefore, the fixing member 70 that is directly stacked on the first substrate 100 and the packing 60, the upper cover inner plate 50, and the upper cover outer plate 40 that are stacked thereon are placed at positions corresponding to the connector 106 and the LED arrangement hole 108. It has a shape to accept.

  First, a cap fixing groove 72 is formed at a position facing the connector 106 of the fixing member 70, and cap through holes 62, 52, 42 are provided at corresponding positions of the packing 60, the upper lid inner plate 50, and the upper lid outer plate 40. Is provided. The members 40, 50, 60, and 70 stacked as the upper lid unit 30 are formed in such a shape, so that the cap 32 is fitted into the upper lid unit 30 and the connector 106 is allowed to enter from above. Can be protected (waterproof). Further, if the cap 32 is removed as necessary, it is possible to connect the external device to the connector 106 and appropriately rewrite the control content recorded on the electronic component disposed on the first substrate 100.

  In addition, an LED light transmitting hole 78 is formed at a position facing the LED arrangement hole 108 of the fixing member 70, and LED light transmitting holes 58 and 48 are provided at corresponding positions on the upper lid inner plate 50 and the upper lid outer plate 40. Is formed. Although the light transmitting hole is not provided at the corresponding position of the packing 60, the packing 60 itself is formed of a light transmitting member as described above. Can be transmitted through. Therefore, by overlapping each member 40, 50, 60, 70 constituting the upper lid unit, the light emitted from the LED arrangement hole 108 reaches the outside of the upper lid unit 30, and the lighting state is visually recognized from above. It becomes possible.

  The fixing member 70 further has a grounding screw receiving hole 80 for releasing a grounding screw (not shown in FIG. 4) for fastening the grounding jig 200 on the side surface. The grounding jig 200 has a U-shape in which three surfaces perpendicular to each other are connected in series, and one of the surfaces facing the fixing member 70 penetrates as a screw receiving hole (female screw). A hole 202 is provided, and screw receiving holes 204 are also provided on the other two surfaces facing each other. A grounding screw (not shown) is screwed in from the outside of the casing 10 and fastened by a through hole 202 formed in the side surface of the grounding jig 200. The screw receiving hole 204 fastens a fastening member for fixing the second substrate 110 (not shown in FIG. 4) from the back side to the fixing member 70.

  The upper lid outer plate 40, the upper lid inner plate 50, and the packing 60 have through holes 44, 54, 64 through which the fastening members 34 for fastening each to the fixing member 70 are passed. , 64 are located close to the cap through holes 42, 52, 62 and the LED light transmitting holes 48, 58. The fastening member 34 passed through the through holes 44, 54, 64 is received and fastened to a screw receiving hole 74 (female screw) provided on the upper surface of the fixing member 70. Further, at the four corners of each member 40, 50, 60, there are through holes 46, 56, 66 through which fastening members for fastening each to the body 11 are passed. Fastening members passed through the through holes 46, 56, 66 are received and fastened to screw receiving holes provided at the four upper corners of the body 11.

  FIG. 5 is a plan view showing the upper lid unit 30. FIG. 5 (A) shows a state where the cap 32 is fitted, and FIG. 5 (B) shows a state where the cap 32 is removed. It is shown.

In FIG. 5, (A): A cap through-hole 42 is formed at a position on the left side in the center portion of the upper lid outer plate 40. In addition, the upper lid outer plate 40 is formed with three LED light transmitting holes 48 at a position on the right side in an arrangement in series in one direction (here, the front-rear direction). A cap 32 is fitted in the cap through hole 42. The hexagonal depression formed on the upper surface of the cap 32 is a hole for fitting a tool such as a hexagon wrench when the cap 32 is fitted into the upper lid unit 30. By tightening with a tool, the tightening torque of the cap 32 can be adjusted appropriately to ensure a reliable sealing property (waterproofness).
Fastening members 34 are fastened at two locations sandwiching the cap through hole 42 and the LED light transmitting hole 48 from the outside. Further, although not visible from above the upper lid outer plate 40, it can be seen that the grounding jig 200 and the grounding screw 210 are disposed at a position on the lower left side of the cap through-hole 42 below this.

  In FIG. 5, (B): The connector 106 is exposed from the opening from which the cap 32 is removed. A cap fixing groove 72 is formed around the opening, and the cap 32 is fixed to the upper lid unit 30 by meshing with the thread formed on the cap 32. The position in the horizontal direction of the connector 106 coincides with the center of the cap fixing groove 72 and further coincides with the center of the cap 32 fitted therein.

FIG. 6 is a bottom view showing the upper lid unit 30.
The first substrate 100 is fastened to the bottom surface of the fixing member 70 disposed at the lowermost part of the upper lid unit 30 by fastening members 102 at two locations. In addition, an LED chip 103 is provided at the bottom of each of the three LED light transmitting holes 108 in series in the front-rear direction, and a protective seal 101 formed of a sealing material such as silicon is further provided below the LED chip 103. The light hole 108 and each LED chip 103 are completely covered. The protective seal 101 prevents the optical path from being blocked by the sealing resin filled in the casing 10 flowing into the LED light transmitting holes 108.

  FIG. 7 is a diagram for explaining an adhesion mode between the fixing member 70 and the first substrate 100. Among these, FIG. 7A shows a bottom view of the fixing member 70, and FIG. 7B shows a plan view of the first substrate 100.

  7A: An annular protective groove 88 is formed on the bottom surface of the fixing member 70 at a position spaced from the outer periphery of the cap fixing groove 72, and further on the outer side of this groove. An annular adhesive groove 86 is formed. Similarly, an annular protective groove 84 and an annular adhesive groove 82 are also formed around the three LED light transmitting holes 78 in series with each other (double here). In this figure, the adhesive grooves 82 and 86 and the protective grooves 84 and 88 are colored in gray, and it can be seen that each groove has a certain width. The adhesion grooves 82 and 86 are grooves into which an adhesive (sealing agent) used when the upper surface of the first substrate 100 is adhered to the bottom surface of the fixing member 70 is injected. The protective grooves 84 and 88 are grooves that receive the adhesive overflowing from the adhesive grooves 82 and 86.

  7B: When the upper surface of the first substrate 100 is fixed to the bottom surface of the fixing member 70, positions corresponding to the adhesive grooves 82 and 86 and the protective grooves 84 and 88 are indicated by two-dot chain lines and colored in gray. Has been. From this figure, the protective grooves 84 and 88 formed on the inner side of the adhesive grooves 82 and 86 are formed at positions spaced from the connector 106 and the LED light transmitting hole 108 arranged on the inner side of these. I understand that.

  When the first substrate 100 is fixed to the fixing member 70, the adhesive is injected into the bonding grooves 82 and 86, the upper surface of the first substrate 100 is pressed against the bottom surface of the fixing member 70, and then the first substrate 100 is bonded. A fastening member is passed through the through hole 104 from the bottom surface side of one substrate 100 and fastened to a screw receiving hole 76 provided on the bottom surface of the fixing member 70. At this time, there is a possibility that the adhesive overflows from the adhesive grooves 82 and 86 and flows into the inner side depending on the injection condition of the adhesive. If such a situation occurs, and the flowed adhesive reaches the cap fixing groove 72 and the LED light transmitting hole 78, the adhesive adheres to a part of the cap fixing groove 72, and the sealing performance of the cap cannot be secured. There is a possibility that a part of the LED transparent hole 78 may be blocked and light emission may be affected. Therefore, protective grooves 84 and 88 are provided inside the adhesive grooves 82 and 86 so that when the adhesive overflowing from the adhesive grooves 82 and 86 flows into the inside, they are accepted and do not flow further into the inside. doing.

FIG. 8 is a perspective view illustrating a state in which the cap 32 is viewed obliquely from below.
The cap 32 is formed by joining a cylindrical fitting portion that is fitted into the opening of the upper lid unit 30 and a top plate portion that has an area larger than the opening that closes the upper end thereof. Made of resin. On the outer surface of the fitting portion, a screw thread 36 that is fitted into a groove formed around the opening is formed. In addition, an annular protrusion 38 is formed on the top plate portion at a position closer to the outer periphery than the position where it is joined to the fitting portion.
When the power supply device 1 is used, by screwing the cap 32 into the opening of the upper lid unit 30, the thread 36 is fitted into the groove formed around the opening, and at the same time, the annular protrusion 38 is attached to the elastic packing 60. Since the cap 32 is pressed, the annular protrusion 38 bites into the packing 60 when the cap 32 is completely fitted. With such a structure, the cap 32 can secure water tightness with respect to the upper lid unit 30 and can protect the connector located inside the cap 32 from getting wet.

FIG. 9 is a vertical cross-sectional view (a cross-sectional view taken along line IX-IX in FIG. 5) showing a part of the upper lid unit 30 in a state where the cap 32 is completely fitted.
As shown in this figure, the cap 32 is disposed at a position covering the connector 106, and the screw thread 36 is engaged with the cap fixing groove 72 to be fitted into the fixing member 70 and fixed. Further, the annular protrusion 38 bites into the packing 60 and completely blocks the path through which water can enter from the outside.
On the bottom surface of the fixing member 70, a protective groove 88 is formed at a position spaced outward from the outer periphery of the cap fixing groove 72, and an adhesive groove 86 is formed at a position spaced further from here. Further, a protective groove 84 is formed at a position spaced from the outer periphery of the LED light transmitting hole 108 to the outside, and an adhesive groove 82 is formed at a position spaced further from here. The protective grooves 84 and 88 formed on the inner side are deeper than the adhesive grooves 82 and 86 formed on the outer side, and can sufficiently receive the adhesive overflowing from the inner side of the adhesive grooves 82 and 86. I understand that.

An LED light source 105 is placed on the LED chip 103 disposed at the bottom of the LED light transmitting hole 108, and the space above the LED light source 105 is open except for the packing 60. With such an arrangement, the light emitted from the LED light source 105 passes through the translucent packing 60 and is emitted further upward, so that the lighting state of the LED light source 105 can be viewed from above the upper lid unit 30. it can.
The LED light transmitting hole 108 is covered with a protective seal 101 from the bottom surface side of the first substrate 100 together with the LED chip 103, and is protected from intrusion of sealing resin that fills the bottom surface side of the first substrate 100. Has been.

FIG. 10 is a vertical cross-sectional view (cross-sectional view taken along the line XX in FIG. 5) that simply represents the overall structure of the power supply device 1.
The power supply device 1 accommodates three substrates (a first substrate 100, a second substrate 110, and a third substrate 120) in an internal space 140 surrounded by the upper lid unit 30, the body 11, and the lower lid unit 20. These substrates 100, 110, 120 are fixed directly or indirectly to the fixing member 70 that forms a part of the upper lid unit 30, so that the positions in the internal space 140 are determined, and the substrates 100, 110 are also determined. , 120 are electrically connected to each other. Further, the fixing member 70 supports the grounding jig 200 on its side. The grounding jig 200 is a sealing resin with respect to the inner space 140 formed in the casing after the final stage of assembling the power supply device 1, that is, after the upper lid unit 30 is fastened to the body 11 with the fastening member 12. In the stage before 150 is filled, by receiving and fastening the grounding screw 210 inserted from the outside of the body 11, the electronic components provided on each of the substrates 100, 110, 120 are attached to the casing (body 11). Ground.

The fixing member 70 further has a cap fixing groove 72 at a position surrounding the connector 106 provided on the first substrate 100, and the cap 32 is fitted in the fixing groove 72 in a normal state. By causing the annular protrusion 38 provided inside the cap 32 to bite into the packing 60, the water tightness of the space closed by the cap 32 is made more reliable, and the connector 106 is protected from being wet. Further, the packing 60 also plays a role of preventing water from entering by bringing the joint portion between the upper lid unit 30 and the body 11 into close contact with each other without a gap.
In the completed state of the power supply device 1, the sealing resin 150 fills and seals almost the entire inner space 140 while leaving some space between the inner surface of the lower lid unit 20, and the hollow portion of each electronic substrate. The surface is protected while keeping it in a stable state.

  As described above, the power supply device 1 realizes a waterproof structure for the electronic components housed in the internal space 140 with the entire components. All the materials of the constituent members are used for a general power supply device, and special materials and parts are not adopted for waterproofing. For example, when the waterproof connector described in the prior art is used, a certain amount of cost is required for waterproofing, which increases the manufacturing cost. On the other hand, in this embodiment, it is possible to realize waterproofing at low cost by the configuration as described above.

FIG. 11 is a front view illustrating an upper lid unit in a power supply device according to a different embodiment.
FIG. 11A is a front view showing the upper lid unit 230 in the low-profile power supply device. Here, the “low profile type” refers to a type adopting a shape in which the dimension in the short direction (width in the case of the power supply device 1 in the above-described embodiment) is suppressed due to space restrictions of the installation location. . When compared with the upper lid unit 30 in the above-described embodiment, the lateral width of the upper lid outer plate 140 disposed at the uppermost portion of the upper lid unit 230 is suppressed small, and the outer surface of the standing portion is the upper lid inner plate 50. And it arrange | positions in alignment with each edge part of the packing 60, and a straight line. In this case, the pressing force by the upper lid outer plate 140 on the end of the packing 60 is weakened by the curved shape formed at the base of the standing portion of the upper lid outer plate 140. However, since the upper lid inner plate 50 is disposed between the upper lid outer plate 140 and the packing 60 and the end portion of the upper lid inner plate 50 can push the end portion of the packing 60 into a low profile type. The upper lid inner plate 50 sufficiently reinforces the pressing force by the upper lid outer plate 140 that is reduced by the above, and, like the upper lid unit 30, the packing 60 is pressed against the upper end of the body 11 and sealed in a crimped state. Is possible.

  FIG. 11B is a front view showing the upper lid unit 330 in the power supply device of a further different embodiment. In the upper lid unit 330, as in the upper lid unit 30 of the power supply device 1, the outer surface of the upright portion of the upper lid outer plate 40 disposed at the uppermost portion protrudes outward from the end portion of the packing 60. Therefore, only the rectangular bottom face faces the packing 60 and both end portions thereof can be pushed in. Accordingly, the upper lid inner plate 50 can be closed with the packing 60 being pressed against the upper end of the body 11 without any reinforcement of the pressing force by the upper lid inner plate 50, so that the upper lid inner plate 50 is not interposed. By adopting such a configuration, it is possible to effectively suppress the material required for the casing 10 and the cost required for assembly.

  As described above, according to the power supply device 1 according to the above-described embodiment, the upper lid unit 30 and the body 11 are fastened with the packing 60 sandwiched therebetween, so that waterproofness is exhibited. Water can be prevented from entering. When the connector 106 is used, the cap 32 can be removed to expose the connector 106 and connect an external device for work to the connector 106. On the other hand, during normal operation of the power supply device 1, the cap 32 is fitted. The cap 32 is brought into close contact with the upper lid unit 30 so that the waterproof property of the space in which the connector 106 is disposed can be reliably maintained.

  Further, since the protective groove 88 is formed inside the adhesive groove 86 to which the sealing material is applied, the sealing material overflows inward from the adhesive groove 86 when the first substrate 100 and the fixing member 70 are bonded. Even if it is, the protective groove 88 can reliably catch this. Therefore, the cap 32 can be firmly fastened to the cap fixing groove 72 while preventing the sealing material from flowing into the cap fixing groove 72.

  Further, when the cap 32 is fastened to the cap fixing groove 72, the annular protrusion 38 provided on the cap 32 pushes the packing 60 and is fixed to the fixing member 70 in close contact with the packing 60. Is more securely sealed. Therefore, it is possible to further improve the water tightness in the arrangement space of the connector 106 surrounded by the first substrate 100, the fixing member 70, and the cap 32.

  With the structure as described above, the waterproofing in the casing 10 is ensured and the electronic components (connector 106, each of the boards 100, 110, 120, etc.) housed in the power supply device 1 are protected from getting wet, and lighting is performed. It becomes possible to stably supply power to the appliance.

  The present invention can be implemented in various modifications without being limited to the above-described embodiments. For example, the insulating plate 28 provided as a countermeasure against metal burrs in the metal perforations 26 covers the entire flat rectangular portion of the lower lid outer plate 21 and opens the cable holes 27 at positions corresponding to the metal perforations 26. However, the present invention is not limited to this, and other shapes may be adopted depending on the situation of metal burrs and the cost. For example, a convex section (circumferential direction) grommet that covers and protects only the edge of the metal perforation 26 may be used. Further, this may be further simplified, and a flat type member in which the inner peripheral side of the grommet does not bite into the inner peripheral surface of the metal perforation 26 may be put on the edge of the metal perforation 26.

  The cap 32 seals the opening of the upper lid unit 30 by engaging the screw thread 36 with the cap fixing groove 72 and screwing in, but other mechanisms may be adopted as long as the opening can be sealed. For example, this portion is formed of an elastic material such as rubber instead of the screw thread 36, and at the same time, this portion is changed to the cap fixing groove 72 to form a flat mouth portion, and the cap 32 is press-fitted into the mouth portion to thereby open the opening. It is also possible to use a pressure stopper type for sealing. In order to maintain the hermeticity more reliably, the cap may be fixed with a detachable metal fitting or the like from the cap that has been stoppered.

  The cap 32 and the fixing member 70 are both made of PBT as an example. However, the material is not limited to this and may be a material that can exhibit desired performance in terms of shape stability and insulation. For example, other materials can be appropriately selected.

  The inside of the casing 10 protects the electronic component from being wetted by a sealing resin 150 filled in a space formed between the accommodated electronic component. Here, an insulating side wall formed of an insulating material is provided inside the casing 10 side surface, that is, in a region excluding a portion related to grounding inside the body 11, and an electronic component is accommodated inside the insulating side wall. The space formed between the parts may be filled with the sealing resin 150.

  In the lid units 20, 30 that close both ends of the body 11, the upper lid unit 30 is provided with a packing 60 at a part thereof to closely adhere the joining portion at the upper end of the body 11 without any gaps, while improving the water tightness. Is configured such that the packing 60 is not used. This is a configuration adopted in consideration of the positional relationship (the possibility of water entering from the bottom to the top is low, and the lower lid unit 20 has determined that it is not necessary to ensure the water tightness as much as the upper lid unit 30). The lower lid unit 20 may also include the packing 60 to further improve water tightness.

DESCRIPTION OF SYMBOLS 1 Power supply device 10 Casing 11 Fuselage 12, 22, 34, 102 Fastening member 20 Lower lid unit 21 Lower lid outer plate 24, 44, 46, 54, 56, 64, 66, 104, 114, 202 Through-hole 26 Metal perforation 27 Cable hole 28 Insulating plate 30, 230, 330 Upper lid unit 32 Cap 36 Screw thread (fastening means)
38 Annular projection 40,140 Upper lid outer plate 42,52,62 Cap through hole (connection port)
48, 58, 78 LED light transmitting hole 50 Inner cover inner plate 60 Packing (seal member)
70 Fixing member 72 Cap fixing groove (fastening means)
74, 76, 204 Screw receiving hole 80 Grounding screw receiving hole 82 Adhesive groove 84 Protective groove 86 Adhesive groove (double waterproof groove)
88 Protective groove (double waterproof groove)
100 1st board (circuit board)
101 Protective seal 103 LED chip 105 LED light source 106 Connector (electronic component)
108 LED arrangement hole 110 Second substrate 120 Third substrate 140 Internal space 150 Sealing resin 200 Jig for grounding 202 Screw receiving hole 210 Screw for grounding

Claims (4)

An electronic circuit with electronic components;
A casing fastened in a direction in which at least one end of the fuselage is covered with a lid while the electronic circuit is housed inside a cylindrical fuselage, and the lid and the fuselage are in close contact with each other;
A seal member provided between the lid and one end of the body, and exhibiting waterproof properties with fastening of the lid and the body;
A connection port that is formed through the lid and the seal member, and allows operation of the electronic component from the outside of the casing;
An electronic device provided with a cap that is fitted into the connection port from the outside of the lid, and in which the electronic component is concealed in this fitted state so that the seal member is in close contact with the seal member so as to exhibit waterproofness. . The electronic device according to claim 1,
A circuit board on which the electronic component is mounted together with the electronic circuit;
The cap is attached with the seal member interposed between the lid and the inner surface of the lid, and the fitting port of the cap that leads to the connection port is formed to penetrate therethrough and the electron in the fitting port. A fixing member for fixing the circuit board in a state where components are received;
The fixing member is formed as an annular groove that overlaps around the fitting opening on the surface of the fixing member facing the circuit board, and an outer adhesive groove waterproofs the circuit board and the fixing member. An electronic apparatus further comprising a double waterproof groove that holds a sealing agent to be bonded while an inner protective groove prevents the sealing agent from flowing into the fitting port. The electronic device according to claim 2,
Fastening means that is formed on both the cap and the fixing member and fastens each other in a state where the cap is fitted into the fitting port,
The cap is
An electronic apparatus comprising an annular protrusion that is in close contact with the seal member around the connection port.   A power supply device that waterproofs the casing of the electronic device according to any one of claims 1 to 3 by filling with a sealing resin, and controls supply of electric power necessary for lighting a lighting fixture by the electronic circuit.