DC power supply device

Abstract

To provide a DC power supply device capable of achieving miniaturization.SOLUTION: The DC power supply device includes: a base plate 50; a power line 60 connected to the base plate 50 for supplying AC power from an external power supply; an electronic component placed on the base plate 50 including a power conversion component for converting the AC power into DC power; an output terminal 41 for outputting the DC power; and a chassis 10, 20, 30 enclosing the base plate 50 and the electronic component. The chassis 30 has an opening 35. The opening 35 is provided with a fixing member 70 for fixing the power line 60 to the opening 35. The power line 60 extends to the outside of the chassis 10, 20, 30 via the fixing member 70.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] Conventionally, USB outlets are widely known as DC power supply devices for supplying DC power to electronic devices such as smartphones, tablet terminals, notebook computers, etc. DC power supply devices such as USB outlets include a 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 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 board and supplies AC power to electronic components mounted on the board. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-113239 A Summary of the Invention [Problem to be solved by the invention]

[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 a terminal member inside a housing into which a power line electrically connected to an external power source is inserted. Therefore, it is necessary to secure a space inside the device for arranging the terminal member, and miniaturization is not easy. [Means for solving the problem]

[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 arranged on the substrate and including a power conversion component that converts AC power into DC power, an output terminal that outputs DC power, and a housing that encloses the substrate and the electronic components, the housing having an opening, 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. Effect of the Invention

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

[0008] [Figure 1] 1 is a perspective view of a socket using a DC power supply device according to a first embodiment. [Diagram 2] 1 is a perspective view of a DC power supply device according to a first embodiment, as viewed from the front side. [Diagram 3] 1 is a perspective view of a DC power supply device according to a first embodiment, as viewed from the rear side. [Figure 4] 1 is an exploded perspective view of a DC power supply device according to a first embodiment; [Diagram 5] FIG. 2 is a diagram showing the DC power supply device according to the first embodiment, viewed from above with a second housing constituting the device removed. [Figure 6] 2 is an enlarged view showing the vicinity of a connection point of a power supply line in the DC power supply device according to the first embodiment. FIG. [Figure 7] FIG. 11 is a rear perspective view of a DC power supply device according to a second embodiment. [Figure 8] 8 is a cross-sectional view taken along line AA in FIG. 7. [Figure 9] FIG. 2 is a diagram showing an example of an arrangement of power lines constituting a DC power supply device. [Figure 10] FIG. 2 is a diagram showing an example of an arrangement of power lines constituting a DC power supply device. [Figure 11]FIG. 13 is a perspective view of a third housing constituting the DC power supply device, showing a mechanism for maintaining the power line in a bent state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 selectively combine the respective 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 the DC power supply device 2.

[0011] As shown in FIG. 1, the outlet 1 is a wiring device including 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 with 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 is a rectangular frame-shaped plate when viewed from the front, and covers an installation hole formed in the wall 100, a mounting frame installed around the installation 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 construction 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 from the opening 4a of the decorative plate 4.

[0013] In the example shown in Fig. 1, two DC power supply devices 2 are disposed 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 lined up in the vertical direction. The two DC power supply devices 2 are disposed above the power outlet device 3, but the arrangement of the DC power supply devices 2 in an outlet equipped with the DC power supply devices 2 is not particularly limited. The number of the DC power supply devices 2 is also not particularly limited. 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, the present specification uses terms indicating the front-rear, up-down, and left-right directions for the outlet 1, the DC power supply device 2, and each component of the DC power supply device 2. The front-rear direction means the direction in which a connector connected to the DC power supply device 2 is inserted and removed. The up-down direction is the direction along the vertical direction, and the left-right direction is the direction perpendicular to the up-down direction and the front-rear direction. Furthermore, the left and right refer to the left and right when the DC power supply device 2 is viewed from the front, unless otherwise specified.

[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 100V or 200V. On the front surface of the outlet 1, two connection ports 2b of the DC power supply device 2 and a connection port 3b of the power outlet device 3 are provided side by side in the vertical direction.

[0016] In this specification, USB includes various generations (standards of transfer speed) of USB, such as USB1.0, USB1.1, USB2.0, USB3.0, USB3.1, USB3.2, USB4, etc. Furthermore, 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. Furthermore, 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 be installed on furniture such as a desk, a shelf, a counter table, or a bed, or on a vehicle such as an automobile, an airplane, or a railroad car.

[0017] Next, the overall configuration of the DC power supply device 2 will be described with reference to Fig. 2 to Fig. 4. Fig. 2 is a perspective view of the DC power supply device 2 as seen from the front side, Fig. 3 is a perspective view of the DC power supply device 2 as seen from the rear side, and Fig. 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 as housings that 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 < the horizontal length < the front-rear length.

[0019] As shown in FIG. 4, a first board 40 and a second board 50 on which electronic components are mounted are housed inside the housing. The first board 40 is disposed so that the board surface is parallel to the vertical direction, and the second board 50 is disposed so that the board surface is perpendicular to the vertical direction. That is, the surface of the first board 40 is disposed in a state that is aligned with the normal direction of the surface of the second board 50. The first board 40 and the second board 50 are electrically connected. In this embodiment, an output terminal 41 that outputs DC power is mounted on the first board 40, and a power conversion component that converts AC power to DC power is mounted on the second board 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 wire (not shown) electrically connected to an external power source (for example, a commercial power source) outside the housing. Thus, AC power from the external power source is supplied to the second substrate 50 through the power line 60. By connecting the power line 60 connected to the second substrate 50 to the wire of the external power source outside the housing, it is not necessary to provide a terminal member such as a quick-connect terminal into which the wire of the external power source is inserted inside the housing. As a result, the DC power supply device 2 can be easily miniaturized. In addition, by extending the power line 60 from inside the housing to outside the housing through the fixing member 70, when a pulling or pushing force is applied to the power line 60 during construction, etc., the power line 60 is prevented from shifting, and the occurrence of a connection failure due to the power line 60 coming off the second substrate 50 can be prevented. Moreover, by covering a part of the power line 60 with the cover member 80, the power line 60 is prevented from being excessively bent by an external force, and damage and disconnection of the power line 60 are prevented. Note that the method of 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] As shown in Figs. 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 a front surface 10a of the first housing 10 becomes 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, in which the connection port 2b is formed, is exposed from an 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 the front of the DC power supply device 2.

[0023] The first housing 10 has a generally rectangular shape when viewed from the front, and the length in the left-right direction is longer than the length in the up-down direction. 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] Further, 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. Since the front surface 10a of the first housing 10 is a portion that the user can touch, the first housing 10 is preferably made of a resin material that does not easily transmit heat from the electronic components mounted on the first board 40 and the second board 50. The resin that constitutes 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 incorporated 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 constitutes the lower 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 respectively constitute the rear surface, right surface, and left surface 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 smaller than the main wall 31, and are formed, for example, perpendicular to the main wall 31, and have the same height as each other.

[0028] An opening 35 is provided in the side wall 32 constituting 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) substantially parallel to the surface of the second substrate 50. Although described in detail below, by making the opening direction of the opening 35 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 place where the user's hands touch them in normal use. Therefore, by making the second housing 20 and the third housing 30 out of metal, the heat of 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 preferable from the viewpoints of thermal conductivity, light weight, workability, and the like.

[0030] Each of the first housing 10, the second housing 20, and the third housing 30 may be composed of two or more members. For example, each of the second housing 20 and the third housing 30 may have a first member surrounding the second substrate 50 and a second member surrounding the outside of the first member. In that 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 for outputting DC power. An output circuit for outputting DC power converted by a power supply circuit of the second board 50 (described later) from the output terminal 41 is also provided on the first board 40. The first board 40 is disposed on the front side of the internal space of the third housing 30 so that the board surface is parallel to the up-down 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 second board 50 is inserted into the opening, whereby the first board 40 and the second board 50 are fixed to each other.

[0032] The output terminal 41 is disposed, for example, at 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 as a whole. The type of the 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 through a connection port 2b formed in the first housing 10.

[0033] As shown in Fig. 4, the second substrate 50 is a printed circuit board on which electronic components including a power conversion component for converting AC power to DC power are mounted. The second substrate 50 is disposed so that the substrate surface is perpendicular to the up-down direction. The second substrate 50 has a substantially rectangular shape, and the length in the front-rear direction is greater than the length in the left-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), 56 are mounted on the upper surface of the second substrate 50 as broadly defined power conversion components constituting the power supply circuit. In addition, 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 when the power supply circuit is in operation. Therefore, it is preferable to mount the transformer 54 and the inductors 55 and 56 on the second substrate 50 at a distance from each other. 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 line 60 that supplies AC power from an external power source is connected to the second substrate 50. The power line 60 is connected, for example, by soldering the tip of the power line 60 while being inserted into a through hole provided in the second substrate 50. In this embodiment, the power line 60 includes a first power line 61 and a second power line 62. The first power line 61 and the second power line 62 both extend to the outside of the housing through the opening 35. As described above, the fixing member 70 is provided in the opening 35. Therefore, the first power line 61 and the second power 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 FIG. 5 and FIG. 6, the first power line 61 is connected to a position moved forward a predetermined length from the rear end of the second substrate 50. Therefore, the first power line 61 has a first portion 63 extending in a direction (up-down direction) substantially perpendicular to the surface of the second substrate 50, and a second portion 64 extending in a direction (front-rear direction) substantially parallel to the surface of the second substrate 50. When the power line 60 extending to the outside of the housing is pulled during construction work, etc., a pulling force is also applied to the power line 60 inside the housing. At that time, 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 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 come off the second substrate 50. Also, 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. By mounting electronic components directly below the second portion 64, it becomes easy to mount heat-generating components away from the DC power supply device 2 while reducing its size. 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, the first power line 61 can be easily bent gently 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, and is, for example, 30 mm.

[0040] The second power line 62 is connected to the rear end of the second substrate 50. Therefore, the second power 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. That is, the second power line 62 does not have a portion that extends in a direction substantially parallel to the surface of the second substrate 50 (front-rear direction) inside the housing. Note that the second power line 62 may be connected to a position moved a predetermined length forward from the rear end of the second substrate 50, similar to the first power line 61.

[0041] The opening 35 is provided with a fixing member 70 having a cylindrical shape that fixes the power line 60 to the opening 35. The fixing member 70 is, for example, a bush. The fixing member 70 has rubber elasticity and is made of, for example, an elastomer such as silicone rubber or urethane rubber. The fixing member 70 is one size 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 at 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 the resulting failure of the power line 60, such as disconnection, is 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 fixed member 70, which contacts the fixed member 70 and covers the power line 60. The cover member 80 has, for example, a substantially rectangular prism shape or a substantially cylindrical shape, and is fitted with the rear end of the fixed member 70. The cover member 80 may be made of a rubber material like the fixed 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 a plurality of slits in the front-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. In this embodiment, the cover member 80 has a shape that extends in the front-rear direction, but 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 Fig. 7 and Fig. 8. Fig. 7 is a perspective view of the DC power supply device 2A as seen from the rear side, and Fig. 8 is a cross-sectional view taken along line AA in Fig. 7. In the following, the same reference numerals are used for configurations common to the first embodiment, and duplicated descriptions are omitted, and 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 a side wall 32, of the side walls of the third housing 30, on which the opening 35 is provided. Also, the power 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 line 60 bent. In this embodiment, the power 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 on the inner side (front side) of 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 be disposed on the outer side (rear side) of 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 this 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 the length direction. The width of the groove 90 is not particularly limited as long as the power line 60 can be disposed therein, and is, for example, 120% or more and 300% or less 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 toward the opening 35. By providing the inclined region 93 in the groove 90, the power line 60 is gently bent, and disconnection due to bending of the power line 60 is suppressed. The depth of the groove 90 in the inclined region 93 may change linearly or nonlinearly. In the present embodiment, the inclined region 93 is provided over the entire area of ​​the groove 90 in the length direction, but the inclined region 93 may be provided only in a part of the groove 90 in the length direction. 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 first and second embodiments can be appropriately modified in design without impairing the purpose of the present disclosure. For example, in the above first and second embodiments, the relationship of the lengths of the external shapes of the DC power supply devices 2, 2A is vertical length < horizontal length < front-rear length, but the relationship of the lengths of the external shapes is not limited to this. The relationship of the lengths of the external shapes of the DC power supply devices 2, 2A can be appropriately set depending on the shape and number of the output terminals 41 provided in the DC power supply devices 2, 2A, for example, 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 more easily determined.

[0054] In the first and second embodiments, the power line 60 is gently bent inside the housing 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 from the surface of the second substrate 50 to the upper side in the up-down direction, and then be bent substantially perpendicularly to the rear side in the front-rear direction and extend to the outside of the housing. The power line 60 may also be bent to have a U-shape when viewed from the left-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 FIG. 9 and FIG. 10, and other configurations are omitted. As shown in FIG. 9, the power line 60 may extend from the surface of the second substrate 50 to the upper side in the vertical direction, bend downward in the vertical direction, bend upward again in the vertical direction, bend backward in the front-rear direction, and extend to the outside of the housing. In other words, the power line 60 may have multiple bent portions.

[0056] Also, as shown in FIG. 10, the power line 60 may extend from the surface of the second substrate 50 upward in the vertical direction, then bend backward in the front-rear direction, then bend downward in the vertical direction, then bend backward in the front-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-right direction outside the housing. As described above, by having a plurality of bent portions in the power line 60, when the power line 60 extending to the outside of 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, a rib-shaped protrusion 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 abutting the power line 60 against the protrusion 36. The shape, position, etc. of the protrusion 36 can be appropriately set according to the shape and bent state of the power line 60.

[0058] The present disclosure is further illustrated by the following embodiments. Configuration 1: A DC power supply device comprising: a board; a power line connected to the board and supplying AC power from an external power source; electronic components arranged on the board and including a power conversion component that converts the AC power into DC power; an output terminal that outputs the DC power; and a housing surrounding the board and the electronic components, the housing having an opening, 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. Configuration 2: The DC power supply device according to configuration 1, wherein the opening direction of the opening is substantially parallel to a surface of the substrate. Configuration 3: The DC power supply device of configuration 2, wherein inside the housing, the power supply line has a first portion extending in a direction approximately perpendicular to the surface of the substrate, and a second portion extending in a direction approximately parallel to the surface of the substrate. Configuration 4: The DC power supply device of 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 the side wall of the housing in which the opening is provided, in which the power line extending outside the housing is placed. Configuration 7. The DC power supply of configuration 6, wherein the groove has a tapered region where the depth of the groove increases approaching the opening. Configuration 8: The DC power supply device according to configuration 6 or 7, 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. Configuration 9: The DC power supply device according to any one of configurations 1 to 8, wherein inside the housing, the power line has at least one bent portion. Configuration 10: The DC power supply device according to any one of configurations 1 to 9, wherein inside the housing, the power line has a plurality of bent portions. 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 comes into contact with the power line and maintains the power line in a bent state. [Explanation of symbols]

[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 Slope area, 100 Wall, 101 Electronic device, 102 USB connector, 103 Cable

Claims

1. A substrate; an electronic component including a power conversion component mounted on the substrate for converting AC power into DC power; a power supply line connected to the board and supplying AC power from an external power supply to the electronic components; an output terminal for outputting DC power; a housing that encloses the substrate and the electronic components; Equipped with The housing has an opening, a fixing member for fixing the power supply line to the opening is provided in the opening, The power supply line extends through the fixing member to the outside of the housing.

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

3. 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. 2. The DC power supply device according to claim 1, wherein a groove is provided on an outer surface of the side wall of the housing in which the opening is provided, in which the power line extending to the outside of the housing is disposed.

7. 7. The DC power supply of claim 6, wherein the groove has a sloped region in which the depth of the groove increases as the groove approaches the opening.

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

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

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

11. 2. 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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