DC POWER SUPPLY EQUIPMENT

Abstract

The invention relates to a device for supplying direct current (DC) and is characterized by a base circuit arrangement (50), a power supply line (60) which is connected to the base circuit (50) and supplies alternating current (AC) from an external power source, electronic components placed on the base circuit (50) and comprising a power converter which converts AC power into DC power, an output terminal (41) which outputs DC power, and enclosures (10, 20, 30) which enclose the base circuit (50) and electronic components; and in which the enclosure (30) has an opening (35), the opening (35) has a fixing detail (70) which fixes the power supply line (60) to the opening (35), and the power supply line (60) is extended to the outside of the enclosures (10, 20, 30) through the fixing detail (70).

Description

DC power supply device

[0001] The present disclosure relates to a DC power supply.

[0002] Conventionally, USB outlets have been widely known as DC power supply devices for supplying DC power to electronic devices such as smartphones, tablet computers, laptop computers, etc. DC power supply devices such as USB outlets include a circuit board on which electronic components are mounted, including a power conversion component that converts AC power from an external power source into DC power, an output terminal that outputs the DC power, and a housing that surrounds the circuit board.

[0003] Patent Document 1 discloses a DC power supply device that includes a terminal member, such as a quick-connect terminal, inside a housing into which a power line electrically connected to an external power source is inserted. The terminal member is electrically connected to a circuit board and supplies AC power to electronic components mounted on the circuit board.

[0004] JP 2018-113239 A

[0005] In recent years, there has been a demand for miniaturization of DC power supply devices. As described above, the DC power supply device disclosed in Patent Document 1 includes, inside a housing, a terminal member into which a power line electrically connected to an external power source is inserted. Therefore, it is necessary to secure a space inside the housing for arranging the terminal member, and miniaturization is not easy.

[0006] A DC power supply device according to one aspect of the present disclosure includes a substrate, a power line connected to the substrate and supplying AC power from an external power source, electronic components disposed on the substrate and including a power conversion component for converting AC power into DC power, an output terminal for outputting DC power, and a housing enclosing the substrate and the electronic components, the housing having an opening with a fixing member provided in the opening for fixing the power line to the opening, and the power line extending to the outside of the housing through the fixing member.

[0007] According to a DC power supply device according to one aspect of the present disclosure, miniaturization can be achieved.

[0008] 7 is a perspective view of an outlet using a DC power supply device according to a first embodiment; FIG. 8 is a perspective view of the DC power supply device according to the first embodiment, as seen from the front side; FIG. 9 is a perspective view of the DC power supply device according to the first embodiment, as seen from the rear side; FIG. 10 is an exploded perspective view of the DC power supply device according to the first embodiment; FIG. 11 is a view of the DC power supply device according to the first embodiment, as seen from above, with a second housing constituting the DC power supply device removed; FIG. 12 is an enlarged view of the vicinity of a connection point of a power supply line in the DC power supply device according to the first embodiment; FIG. 13 is a perspective view of the DC power supply device according to the second embodiment, as seen from the rear side; FIG. 14 is a cross-sectional view taken along line AA in FIG. 7; FIG. 15 is a view showing an example of the arrangement of power supply lines constituting a DC power supply device; FIG. 16 is a view showing an example of the arrangement of power supply lines constituting a DC power supply device; FIG. 17 is a perspective view of a third housing constituting the DC power supply device, and showing a mechanism for maintaining a bent state of the power supply lines.

[0009] Hereinafter, an example of an embodiment of a DC power supply device according to the present disclosure will be described in detail with reference to the drawings. Note that the scope of the present disclosure includes configurations that are formed by selectively combining the components of the multiple embodiments and modifications described below.

[0010] [First embodiment] A DC power supply device 2 according to a first embodiment will be described in detail with reference to Figures 1 to 6. Figure 1 is a perspective view of a socket 1 using a DC power supply device 2.

[0011] As shown in FIG. 1 , the outlet 1 is a wiring device equipped with two DC power supply devices 2 and one power outlet device 3, and is installed on a wall 100 of a building. The outlet 1 includes a frame-shaped decorative plate 4 having an opening 4a formed therein, and front surfaces 2a, 3a of the DC power supply device 2 and the power outlet device 3 are exposed through the opening 4a of the decorative plate 4. The decorative plate 4 has a rectangular frame shape when viewed from the front, and covers a construction hole formed in the wall 100, a mounting frame installed around the construction hole, and the like, so that they cannot be seen. The outlet 1 includes, for example, a frame-shaped metal plate that is screwed to the mounting frame. The decorative plate 4 is fixed to the metal plate, for example, by hooking a claw formed on the back surface of the decorative plate 4 into a hole in the metal plate.

[0012] The outlet 1 is installed with the DC power supply device 2 and the power outlet device 3 inserted into a hole formed in the wall 100. On the front side of the outlet 1 arranged along the wall surface, only the front faces 2a, 3a of the DC power supply device 2 and the power outlet device 3 are exposed through the opening 4a in the decorative plate 4.

[0013] In the example shown in Fig. 1 , two DC power supply devices 2 are arranged adjacent to each other, and the outlet 1 is installed on the wall 100 so that the DC power supply devices 2 and the power outlet device 3 are aligned vertically. Although the two DC power supply devices 2 are arranged above the power outlet device 3, the arrangement of the DC power supply devices 2 in an outlet equipped with the DC power supply devices 2 is not particularly limited. Furthermore, the number of DC power supply devices 2 is not particularly limited. Furthermore, the outlet 1 equipped with the DC power supply devices 2 may be equipped with an optical outlet, a LAN outlet, a telephone line outlet, etc. instead of the power outlet device 3, or may be equipped with only the DC power supply devices 2.

[0014] For ease of explanation, terms indicating front-rear, up-down, and left-right directions are used in this specification for the outlet 1, the DC power supply device 2, and each component of the DC power supply device 2. The front-rear direction refers to the direction in which a connector connected to the DC power supply device 2 is inserted and removed. The up-down direction is a direction along the vertical direction, and the left-right direction is a direction perpendicular to the up-down and front-rear directions. Unless otherwise specified, the left and right directions refer to the left and right when the DC power supply device 2 is viewed from the front.

[0015] An example of the DC power supply device 2 is a USB outlet device. The USB outlet device is a device to which a USB connector 102 can be connected, includes a power conversion component that converts AC power to DC power, and supplies DC power to an electronic device 101 such as a smartphone. In FIG. 1 , the USB connector 102 of a cable 103 extending from the electronic device 101 is connected to the DC power supply device 2. In this embodiment, the DC power supply device 2 will be described as a USB outlet device. The power outlet device 3 is a general outlet device that outputs AC power of 100 V or 200 V. Two connection ports 2b for the DC power supply device 2 and 3b for the power outlet device 3 are arranged vertically on the front surface of the outlet 1.

[0016] The term "USB" in this specification includes various generations (transfer speed standards) of USB, such as USB 1.0, USB 1.1, USB 2.0, USB 3.0, USB 3.1, USB 3.2, and USB 4. The shape of the USB terminal is not particularly limited and may be any of A terminal, B terminal, C terminal, mini USB, micro USB, etc. In the example shown in FIG. 1 , the outlet 1 including the DC power supply device 2 is installed on the wall 100, but the DC power supply device 2 may also be installed on furniture such as a desk, shelf, counter, or bed, or on vehicles such as an automobile, airplane, or railroad car.

[0017] Next, the overall configuration of the DC power supply device 2 will be described with reference to Figures 2 to 4. Figure 2 is a perspective view of the DC power supply device 2 as seen from the front side, Figure 3 is a perspective view of the DC power supply device 2 as seen from the rear side, and Figure 4 is an exploded perspective view of the DC power supply device 2.

[0018] 2 to 4, the DC power supply device 2 includes a first housing 10, a second housing 20, and a third housing 30, which form the external shape of the device. In this embodiment, the DC power supply device 2 has an external shape that is generally rectangular parallelepiped, with the vertical length being smaller than the horizontal length and the front-to-rear length being smaller.

[0019] As shown in Fig. 4, a first substrate 40 and a second substrate 50, each having electronic components mounted thereon, are housed inside the housing. The first substrate 40 is disposed so that its surface is parallel to the vertical direction, and the second substrate 50 is disposed so that its surface is perpendicular to the vertical direction. That is, the surface of the first substrate 40 is disposed in a state where it is aligned with the normal to the surface of the second substrate 50. The first substrate 40 and the second substrate 50 are electrically connected. In this embodiment, an output terminal 41 that outputs DC power is mounted on the first substrate 40, and a power conversion component that converts AC power to DC power is mounted on the second substrate 50.

[0020] A power line 60 is connected to the second substrate 50. The power line 60 extends from inside the housing to outside the housing through the fixing member 70 and the cover member 80. The power line 60 is connected to a power supply cable (not shown) electrically connected to an external power source (e.g., a commercial power source) outside the housing. This allows AC power to be supplied to the second substrate 50 from the external power source via the power line 60. By connecting the power line 60 connected to the second substrate 50 to the external power source cable outside the housing, there is no need to provide a terminal member, such as a quick-connect terminal, inside the housing into which the external power source cable is inserted. As a result, the DC power supply device 2 can be easily downsized. Furthermore, by extending the power line 60 from inside the housing to outside the housing through the fixing member 70, the power line 60 is prevented from shifting when a pulling or pushing force is applied to the power line 60 during installation, etc., and this prevents the power line 60 from coming off the second substrate 50 and causing a connection failure. Furthermore, by covering a portion of the power line 60 with the cover member 80, the power line 60 is prevented from being excessively bent by an external force, thereby preventing damage and disconnection of the power line 60. Note that the method for connecting the power line 60 to a power supply wire electrically connected to an external power source outside the housing is not particularly limited, and any known method can be used.

[0021] Next, each component of the DC power supply device 2 will be described in detail.

[0022] 2 to 4, the first housing 10 is a housing located at the end of the power output side of the output terminal 41. The first housing 10 is formed with a connection port 2b, which is an opening into which a USB connector 102 (see FIG. 1) can be inserted, and the front surface 10a of the first housing 10 serves as the front surface 2a of the DC power supply device 2 in the outlet 1. That is, the DC power supply device 2 is fixed to the mounting frame of the outlet 1 so that the front surface 10a of the first housing 10, on which the connection port 2b is formed, is exposed from the opening 4a of the decorative plate 4 (see FIG. 1). The connection port 2b is an elongated hole extending in the left-right direction, and is formed in the center in the left-right and up-down directions on the front surface 10a of the first housing 10 facing forward of the DC power supply device 2.

[0023] The first housing 10 has a generally rectangular shape when viewed from the front, and the left-right length is longer than the up-down length. Protrusions 11 are provided on both the left and right sides of the first housing 10. The protrusions 11 fit into the third housing 30, thereby fixing the first housing 10 and the third housing 30 together.

[0024] A recess 12 into which the front side of the second board 50 is inserted is provided inside the first housing 10. By inserting the second board 50 into the recess 12, the second board 50 is fixed to the housing.

[0025] The first housing 10 may be made of metal, but is preferably made of resin. Because the front surface 10a of the first housing 10 is a portion that can be touched by the user, the first housing 10 is preferably made of a resin material that does not easily transfer heat from the electronic components mounted on the first substrate 40 and the second substrate 50. The resin that makes up the first housing 10 is not particularly limited, but examples include urea resin, melamine resin, ABS resin, etc.

[0026] The second housing 20 constitutes the upper surface of the DC power supply device 2. The second housing 20 is fitted into the third housing 30 from above and fixed thereto with screws or the like.

[0027] The third housing 30 is disposed substantially parallel to the second board 50 and includes a main wall 31 that forms the bottom surface of the DC power supply device 2, and side walls 32, 33, and 34 that are provided at the ends of the main wall 31 and that respectively form the rear, right, and left surfaces of the DC power supply device 2. The main wall 31 has a rectangular shape, and the side walls 32, 33, and 34 are formed along three sides of the main wall 31. The side walls 32, 33, and 34 are rectangular walls that are smaller than the main wall 31 and are formed, for example, perpendicular to the main wall 31 and have the same height.

[0028] An opening 35 is provided in the side wall 32 that forms the rear surface of the DC power supply device 2. That is, the opening direction of the opening 35 is a direction (front-rear direction) that is substantially parallel to the surface of the second substrate 50. As will be described in detail later, by making the opening direction of the opening 35 a direction that is substantially parallel to the surface of the second substrate 50, the power line 60 and the second substrate 50 are connected in a state in which the power line 60 is bent inside the housing.

[0029] The second housing 20 and the third housing 30 may be made of resin or metal. The second housing 20 and the third housing 30 are disposed inside the wall 100 (see FIG. 1 ) and are not disposed in a location where the user can touch them during normal use. Therefore, by making the second housing 20 and the third housing 30 out of metal, heat from the electronic components mounted on the first board 40 and the second board 50 can be efficiently dissipated to the outside of the device. The metal constituting the second housing 20 and the third housing 30 is not particularly limited, but aluminum or an aluminum alloy is preferred from the viewpoints of thermal conductivity, light weight, processability, etc.

[0030] The first housing 10, the second housing 20, and the third housing 30 may each be composed of two or more members. For example, the second housing 20 and the third housing 30 may each have a first member that surrounds the second substrate 50 and a second member that surrounds the outside of the first member. In this case, the first member may be made of metal, and the second member may be made of resin.

[0031] As shown in FIG. 4 , the first board 40 is a printed circuit board and is provided with an output terminal 41 that outputs DC power. An output circuit is also provided on the first board 40 for outputting DC power converted by a power supply circuit on the second board 50 (described below) from the output terminal 41. The first board 40 is disposed on the front side of the internal space of the third housing 30, with the board surface parallel to the vertical direction. The first board 40 is provided with an opening (not shown) into which the front side of the second board 50 is inserted. The first board 40 and the second board 50 are fixed to each other by inserting the second board 50 into the opening.

[0032] The output terminal 41 is disposed, for example, in the center of the front surface of the first substrate 40. The output terminal 41 is a USB terminal to which a USB connector 102 can be connected, and is formed into a flat, cylindrical shape overall. The type of USB terminal is not particularly limited. The output terminal 41 is mounted in a state in which the USB connector 102 can be inserted and removed via a connection port 2b formed in the first housing 10.

[0033] 4, the second substrate 50 is a printed circuit board on which electronic components, including a power conversion component that converts AC power to DC power, are mounted. The second substrate 50 is disposed so that the surface of the substrate is perpendicular to the up-down direction. The second substrate 50 has a generally rectangular shape, with the length in the front-to-back direction being greater than the length in the left-to-right direction.

[0034] In this embodiment, three electrolytic capacitors 51, 52, and 53 (see FIG. 5 ), a transformer 54, and two inductors 55 (see FIG. 5 ) and 56 are mounted on the upper surface of the second substrate 50 as broadly defined power conversion components that constitute the power supply circuit. Furthermore, semiconductor elements (not shown) including switching elements, diodes, transistors, etc. are mounted on the lower surface of the second substrate 50 as electronic components. Among these electronic components, the transformer 54 and the inductors 55 and 56 generate a large amount of heat during operation of the power supply circuit. Therefore, it is preferable to mount the transformer 54 and the inductors 55 and 56 away from each other on the second substrate 50. In this embodiment, the transformer 54 is mounted on the front side of the second substrate 50, and the inductors 55 and 56 are mounted on the rear side of the second substrate 50.

[0035] A power supply line 60 that supplies AC power from an external power supply is connected to the second substrate 50. The power supply line 60 is connected, for example, by inserting its tip into a through-hole provided in the second substrate 50 and soldering it thereto. In this embodiment, the power supply line 60 includes a first power supply line 61 and a second power supply line 62. The first power supply line 61 and the second power supply line 62 both extend to the outside of the housing through the opening 35. As described above, a fixing member 70 is provided in the opening 35. Therefore, the first power supply line 61 and the second power supply line 62 extend to the outside of the housing through the fixing member 70.

[0036] 5 and 6, the internal structure of the DC power supply device 2, including the connection state between the power line 60 and the second board 50, will be described in detail. Fig. 5 is a view of the DC power supply device 2 seen from above with the second housing 20 removed. Fig. 6 is an enlarged view of the vicinity of the connection point of the power line 60.

[0037] As shown in FIGS. 5 and 6 , the first power line 61 is connected to a position a predetermined distance forward from the rear end of the second substrate 50. Therefore, the first power line 61 has a first portion 63 extending in a direction (vertical direction) substantially perpendicular to the surface of the second substrate 50 and a second portion 64 extending in a direction (front-to-rear direction) substantially parallel to the surface of the second substrate 50. When the power line 60 extending outside the housing is pulled during installation, a pulling force is also applied to the power line 60 inside the housing. In this case, since the first power line 61 has the first portion 63 and the second portion 64, the upward force applied to the connection point between the first power line 61 and the second substrate 50 is reduced. As a result, the first power line 61 is more likely to be prevented from coming off the second substrate 50. In other words, for example, if the opening direction of the opening 35 is substantially perpendicular to the surface of the second substrate 50 and the first power line 61 extends in only one direction inside the housing, when the first power line 61 extending outside the housing is pulled, the force applied to the connection point between the first power line 61 and the second substrate 50 does not decrease, and the first power line 61 may become detached from the second substrate 50. Furthermore, since the first power line 61 has the first portion 63 and the second portion 64, the first power line 61 is bent gently inside the housing. As a result, breakage of the first power line 61 inside the housing can be suppressed.

[0038] In this embodiment, the inductor 56 is mounted directly below the second portion 64. Mounting electronic components directly below the second portion 64 makes it easier to mount heat-generating components away from the DC power supply device 2 while reducing its size. Note that the number of electronic components mounted directly below the second portion 64 may be two or more.

[0039] The length in the front-rear direction from the rear end of the second substrate 50 to the connection position between the first power line 61 and the second substrate 50 is preferably 3 mm or more, and more preferably 5 mm or more. In this case, it becomes easy to gently bend the first power line 61 inside the housing. The upper limit of the length in the front-rear direction from the rear end of the second substrate 50 to the connection position between the first power line 61 and the second substrate 50 can be set appropriately depending on the size of the housing, the size and number of electronic components mounted on the second substrate 50, etc., but is, for example, 30 mm.

[0040] The second power supply line 62 is connected to the rear end of the second substrate 50. Therefore, the second power supply line 62 extends upward from the surface of the second substrate 50, is bent rearward, and is inserted into a through-hole 71 provided in the fixing member 70. In other words, the second power supply line 62 does not have a portion that extends in a direction (front-rear direction) substantially parallel to the surface of the second substrate 50 inside the housing. Note that, like the first power supply line 61, the second power supply line 62 may be connected to a position that is shifted a predetermined length forward from the rear end of the second substrate 50.

[0041] The opening 35 is provided with a cylindrical fixing member 70 that fixes the power line 60 to the opening 35. The fixing member 70 is, for example, a bushing. The fixing member 70 has rubber elasticity and is made of an elastomer such as silicone rubber or urethane rubber. The fixing member 70 is slightly larger than the opening 35 and seals the gap that occurs between the opening 35 and the power line 60.

[0042] The fixing member 70 has one through-hole 71, through which the first power line 61 and the second power line 62 pass. By providing the fixing member 70 in the opening 35, bending of the power line 60 near the opening 35 and displacement of the power line 60 due to pulling and pushing are suppressed, and consequent failures such as breakage of the power line 60 are suppressed. The shape of the fixing member 70 is not particularly limited. For example, the fixing member 70 may have two through-holes, through which the first power line 61 and the second power line 62 pass, respectively.

[0043] A cover member 80 is provided on the outside of the fixing member 70, abutting against the fixing member 70 and covering the power line 60. The cover member 80 has, for example, a substantially rectangular prism shape or a substantially cylindrical shape, and is fitted to the rear end of the fixing member 70. The cover member 80 may be made of a rubber material like the fixing member 70, or may be made of metal. By providing the cover member 80, bending of the power line 60 outside the housing is further suppressed. Note that the cover member 80 may be configured to be moderately bendable by forming multiple notches in the front-to-rear direction.

[0044] The length of the cover member 80 in the front-rear direction is not particularly limited, but is, for example, 5 mm or more and 50 mm or less. Note that, although the cover member 80 has a shape that extends in the front-rear direction in this embodiment, the shape of the cover member 80 is not limited to this. For example, the cover member 80 may have an L-shape.

[0045] Second Embodiment A DC power supply device 2A according to a second embodiment will be described with reference to Figures 7 and 8. Figure 7 is a perspective view of the DC power supply device 2A as seen from the rear side, and Figure 8 is a cross-sectional view taken along line AA in Figure 7. In the following, the same reference numerals will be used to designate components common to the first embodiment, and redundant description will be omitted. Differences from the first embodiment will be mainly described.

[0046] 7 and 8 , the DC power supply device 2A differs from the DC power supply device 2 of the first embodiment in that a groove 90 is provided on the outer surface of the side wall 32 of the third housing 30, on which the opening 35 is provided. Furthermore, the power supply line 60 of the DC power supply device 2A is bent near the opening 35. That is, it is assumed that the DC power supply device 2A will be used with the power supply line 60 bent. In this embodiment, the power supply line 60 is bent to the right when the DC power supply device 2A is viewed from the rear (to the left when the DC power supply device 2A is viewed from the front).

[0047] In this embodiment, the thickness of the side wall 32 of the third housing 30 is greater than the thickness of the side wall 32 of the third housing 30 in the first embodiment. As a result, the rear end of the fixing member 70 is disposed more inward (forward) than the outer circumferential surface of the side wall 32 of the third housing 30. Note that the rear end of the fixing member 70 may also be disposed more outward (rearward) than the outer circumferential surface of the side wall 32 of the third housing 30.

[0048] 7 , the groove 90 includes a first groove 91 extending in the left-right direction and a second groove 92 extending in the up-down direction. A bent power line 60 is disposed in the groove 90. In the present embodiment, as described above, the power line 60 is bent to the right when the DC power supply device 2A is viewed from the rear. Therefore, the power line 60 is disposed in the first groove 91.

[0049] In this embodiment, the groove 90 has a substantially uniform width along its length. The width of the groove 90 is not particularly limited as long as the power line 60 can be disposed therein. For example, the width is 120% to 300% of the diameter of the power line 60.

[0050] As shown in FIG. 8 , the groove 90 preferably has an inclined region 93 in which the depth of the groove 90 increases as it approaches the opening 35. By providing the inclined region 93 in the groove 90, the power line 60 is gently bent, thereby suppressing disconnection of the power line 60 due to bending. The depth of the groove 90 in the inclined region 93 may vary linearly or nonlinearly. Furthermore, in this embodiment, the inclined region 93 is provided over the entire length of the groove 90, but the inclined region 93 may also be provided over only a portion of the length of the groove 90. The depth of the groove 90 is, for example, 0.5 mm or more and 3 mm or less.

[0051] 8, the outer edge of the opening 35 provided in the side wall 32 of the third housing 30 is preferably rounded. In this case, when the power line 60 is bent, the power line 60 is prevented from coming into contact with the outer edge of the opening 35, and damage to the power line 60 is prevented.

[0052] The above-described first and second embodiments can be appropriately modified in design without impairing the object of the present disclosure. For example, in the above-described first and second embodiments, the relationship in length of the external shape of the DC power supply device 2, 2A is vertical length < horizontal length < front-rear length, but the relationship in length of the external shape is not limited to this. The relationship in length of the external shape of the DC power supply device 2, 2A can be appropriately set depending on, for example, the shape and number of output terminals 41 provided in the DC power supply device 2, 2A, and may be horizontal length < vertical length < front-rear length.

[0053] In the second embodiment, the DC power supply device 2A may further include a cover member that covers at least a part of the side wall 32 of the third housing 30, and the power line 60 may be disposed between the third housing 30 and the cover member. In this case, the routing position of the power line 60 can be determined more easily.

[0054] Furthermore, in the first and second embodiments described above, inside the housing, the power line 60 is gently bent to have a first portion 63 extending in a direction substantially perpendicular to the surface of the second substrate 50 and a second portion 64 extending in a direction substantially parallel to the surface of the second substrate 50, but the manner in which the power line 60 is bent is not limited to this. For example, the power line 60 may extend upward in the up-down direction from the surface of the second substrate 50, then be bent substantially perpendicularly to the rear in the front-to-rear direction, and extend to the outside of the housing. Furthermore, the power line 60 may be bent so as to have a U-shape when viewed from the left-to-right direction.

[0055] 9 and 10 show an example of the arrangement of the power line 60. In order to clarify the arrangement of the power line 60, only the power line 60, the second substrate 50, the fixing member 70, and the cover member 80 are shown in FIGS. 9 and 10, and other components are omitted. As shown in FIG. 9, the power line 60 may extend upward from the surface of the second substrate 50 in the vertical direction, then bend downward in the vertical direction, then bend upward again in the vertical direction, then bend backward in the front-to-back direction, and extend to the outside of the housing. In other words, the power line 60 may have multiple bent portions.

[0056] 10 , the power line 60 may extend upward from the surface of the second substrate 50 in the vertical direction, then bend backward in the front-to-rear direction, then bend downward in the vertical direction, then bend backward in the front-to-rear direction, and extend to the outside of the housing. Also, as shown in FIG. 10 , the power line 60 may be bent substantially vertically. Also, as shown in FIG. 10 , the power line 60 may be bent so that the power line 60 extends along the left-to-right direction outside the housing. As described above, by having multiple bends in the power line 60, when the power line 60 extending outside the housing is pulled, the force applied to the connection point between the power line 60 and the second substrate 50 is further reduced.

[0057] A mechanism for maintaining the bent state of the power line 60 may be provided inside the housing. Fig. 11 shows an example of a mechanism for maintaining the bent state of the power line 60. Fig. 11 is a perspective view of the third housing 30. As shown in Fig. 11, rib-like protrusions 36 may be provided on the inner wall of the side wall 33 of the third housing 30, and the bent state of the power line 60 may be maintained by having the power line 60 abut against the protrusions 36. The shape, position, etc. of the protrusions 36 can be set appropriately in accordance with the shape and bent state of the power line 60.

[0058] The present disclosure will be further described by the following embodiments. Configuration 1: A DC power supply device comprising: a substrate; a power line connected to the substrate and supplying AC power from an external power source; electronic components disposed on the substrate, the power line including a power conversion component for converting the AC power into DC power; an output terminal for outputting the DC power; and a housing surrounding the substrate and the electronic components, the housing having an opening, the opening being provided with a fixing member for fixing the power line to the opening, the power line extending to the outside of the housing through the fixing member. Configuration 2: The DC power supply device according to Configuration 1, wherein the opening is opened in a direction substantially parallel to a surface of the substrate. Configuration 3: The DC power supply device according to Configuration 2, wherein, inside the housing, the power line has a first portion extending in a direction substantially perpendicular to the surface of the substrate and a second portion extending in a direction substantially parallel to the surface of the substrate. Configuration 4: The DC power supply device according to Configuration 3, wherein at least one of the electronic components is disposed directly below the second portion. Configuration 5: The DC power supply device according to any one of Configurations 1 to 4, further comprising a cover member that abuts against the fixing member and covers the power line extending outside the housing.Configuration 6: The DC power supply device according to any one of Configurations 1 to 5, wherein a groove is provided on an outer surface of one of the side walls of the housing where the opening is provided, and wherein the power line extending outside the housing is disposed.Configuration 7: The DC power supply device according to Configuration 6, wherein the groove has a sloped region whose depth increases toward the opening.Configuration 8: The DC power supply device according to Configuration 6 or 7, further comprising a lid member that covers at least a portion of the side wall of the housing, and at least a portion of the power line is disposed between the housing and the lid member.Configuration 9: The DC power supply device according to any one of Configurations 1 to 8, wherein the power line has at least one bend inside the housing.Configuration 10: The DC power supply device according to any one of Configurations 1 to 9, wherein the power line has multiple bends inside the housing. Configuration 11: The DC power supply device according to any one of configurations 1 to 10, wherein an inner wall of the housing is provided with a protrusion that abuts against the power line and maintains the power line in a bent state.

[0059] 1 Outlet, 2, 2A Wiring device, 2a, 3a Front, 2b, 3b Connection port, 3 Power outlet device, 4 Decorative plate, 4a Opening, 10 First housing, 11 Protrusion, 12 Recess, 20 Second housing, 30 Third housing, 31 Main wall, 32, 33, 34 Side wall, 35 Opening, 36 Protrusion, 40 First board, 41 Output terminal, 50 Second board, 51, 52, 53 Electrolytic capacitor, 54 Transformer, 55, 56 Inductor, 60 Power line, 61 First power line, 62 Second power line, 63 First part, 64 Second part, 70 Fixing member, 71 Through hole, 80 Cover member, 90 Groove, 91 First groove, 92 Second groove, 93 Inclined area, 100 Wall, 101 Electronic device, 102 USB connector, 103 Cable

Claims

1. A DC power supply device comprising: a board; electronic components mounted on the board and including a power conversion component that converts AC power to DC power; a power line connected to the board and supplying AC power from an external power source to the electronic components; an output terminal that outputs DC power; and a housing enclosing the board and the electronic components, wherein the housing has an opening, a fixing member is provided in the opening for fixing the power line to the opening, and the power line extends to the outside of the housing through the fixing member.

2. The DC power supply device according to claim 1, wherein the opening direction of the opening is substantially parallel to the surface of the substrate.

3. The DC power supply device according to claim 2, wherein inside the housing, the power supply line has a first portion extending in a direction substantially perpendicular to a surface of the substrate, and a second portion extending in a direction substantially parallel to the surface of the substrate.

4. The DC power supply device according to claim 3, wherein at least one of the electronic components is mounted at a position directly below the second portion.

5. The DC power supply device according to claim 1, further comprising a cover member that abuts against the fixing member and covers at least a portion of the power line extending outside the housing.

6. A DC power supply device as described in claim 1, wherein a groove is provided on the outer surface of the side wall of the housing in which the opening is provided, in which the power supply line extending to the outside of the housing is disposed.

7. The DC power supply of claim 6, wherein said groove has a tapered region where the depth of said groove increases as it approaches said opening.

8. The DC power supply device according to claim 6, further comprising a cover member covering at least a portion of a side wall of the housing, and at least a portion of the power line is disposed between the housing and the cover member.

9. The DC power supply device according to claim 1, wherein the power line has at least one bent portion inside the housing.

10. The DC power supply device according to claim 1, wherein the power line has a plurality of bent portions inside the housing.

11. The DC power supply device according to claim 1, wherein an inner wall of the housing is provided with a protrusion that abuts against the power line and maintains the power line in a bent state.

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