TW202123566A - Power strip - Google Patents

Abstract

The purpose of the present disclosure is to suppress reduction in electrical reliability when foreign matter enters. A power strip (1) is provided with a body (40), a cover (50), and an outlet block (A1). The body (40) has an opening (40A) and an internal space (SP1), and is long in a first direction. The cover (50) has an insertion port and covers the opening (40A). The body (40) has, in a bottom surface (400) of the internal space (SP1), at least one wall part (60) along a second direction (D2) crossing the first direction. The wall part (60) has, in a direction (D3) in which the bottom surface (400) and the cover (50) are arranged, a first section (61) that is in contact with a part of the outlet block (A1), and a second section (62) the height of which from the bottom surface (400) is lower than that of the first section (61).

Description

Extension cord

The present invention generally relates to extension cords; more specifically, it relates to extension cords with insertion openings through which the conductors of the plug can be inserted.

In JP2008-305715A, an extension cord is disclosed. The extension cord includes an outer body, an outer body, and a plurality of inner bodies, and the plurality of inner bodies individually hold the plurality of insertion grooves. Therefore, the warpage of the inner body can be reduced, the gap between the outer body and the outer body can be prevented, and water can be prevented from penetrating into the inside of the casing (outer body and outer body). [Literature Technical Literature] [Patent Literature] [Patent Document 1] JP 2008-305715 A

[The problem to be solved by the invention]

At this point, in the extension cord, if foreign matter such as water actually penetrates into the cabinet, it may reduce the electrical reliability.

The present invention was developed in view of the above-mentioned reasons, and its purpose is to provide an extension cord capable of suppressing the decrease in electrical reliability in the case of foreign matter intrusion. [Technical means to solve the problem]

An extension cord of one aspect of the present invention includes a main body, a cover, and a wiring board. The main body has an opening and an internal space connected to the opening, and is elongated in the first direction. The cover has an insertion opening for inserting the conductor of the plug, and covers the opening. The patch panel is accommodated in the internal space and is electrically connected to the conductor inserted from the insertion port. The main body has at least one wall along a second direction crossing the first direction on the bottom surface of the internal space. The wall part has a first part contacting a part of the wiring board in the arrangement direction in which the bottom surface and the cover are arranged, and a second part whose height relative to the bottom surface is lower than the first part.

(1) Summary The drawings described in the following embodiments are schematic diagrams; the respective ratios of the sizes and thicknesses of the constituent elements in the drawings do not necessarily reflect the actual size ratios.

The extension cord 1 of this embodiment, as shown in FIGS. 1, 3, and 4, includes a main body 40, a cover 50, and a wiring board A1. The main body 40 has an opening 40A and an internal space SP1 connected to the opening 40A, and has an elongated shape along the first direction D1 (refer to FIG. 2 ).

As shown in FIG. 2, the cover 50 has an insertion opening 21 into which the conductor 202 of the plug 200 is inserted, and covers the opening 40A. The patch panel A1 is accommodated in the internal space SP1 and is electrically connected to the conductor 202 inserted from the insertion port 21. That is, the extension cord 1 is a device that can be inserted into the "(insertion) plug 200", and supplies power to the inserted plug 200 through the power strip A1. Here, the extension cord 1 as shown in Figure 2 has a 3-port socket 2 (outlet; power socket), and the 3-port socket 2 can be connected to the plug 200 (the first plug) of the power cord 201 drawn from the electrical appliance, etc. P1). In other words, the extension cord 1 can be plugged into at most 3 first plugs P1 at the same time. However, the number of sockets 2 is not limited to three.

The cover 50 has three insertion ports 21 (21A). Each insertion port 21A has three insertion holes 21a, 21b, and 21c into which the plurality of conductors 202 of the first plug P1 are to be inserted. Here, the plurality of conductors 202 of the first plug P1 include a pair of electrodes (blades or cylindrical pins) 202A and one ground terminal 202B.

In this embodiment, the plug 200 includes the second plug P2 in addition to the first plug P1. That is, the plug 200 includes a USB (Universal Serial Bus) plug (the second plug P2). The patch panel A1 includes a USB connector C1 for electrical connection with the conductor 202 (202C) of the second plug P2, and DC power is supplied to the conductor 202C. Here, the extension cord 1 is shown in Fig. 2 and has two USB connectors C1, and at the same time, up to two second plugs P2 can be inserted. However, the number of USB connectors C1 is not limited to two. The cover 50 has two insertion ports 21 (21B) for inserting the second plug P2. The USB connector C1 is a socket where the second plug P2 can be inserted and connected. In short, the extension cord 1 has a USB port, which can supply DC power for charging the battery built in, for example, a portable terminal.

The power cable 5 pulled out from the main body 40 can be connected to an outlet provided on a wall, for example, to supply AC power from an external power source (for example, a commercial AC power source). That is to say, even if the electrical appliance is installed in a place far away from the wall socket, the plug 200 can still be inserted into the insertion port 21 of the extension cord 1, so that the electrical appliance receives AC power through the extension cord 1 (if it is the insertion port 21B, It is DC power). The power cable 5 may also have a power plug that is not connected to a socket provided on a wall or the like, but a harness plug that is connected to a junction box.

Here, the main body 40 of the present embodiment has at least one wall 60 along the second direction D2 intersecting the first direction D1 on the bottom surface 400 of the internal space SP1. Here, as an example, the number of wall portions 60 is two (refer to FIG. 3). However, the number of wall portions 60 is not limited to two.

The wall 60, as shown in FIGS. 1 and 6, in the arrangement direction D3 in which the bottom surface 400 and the cover 50 are arranged, has a first portion 61 contacting a part of the wiring board A1 and a height relative to the bottom surface 400 The second part 62 is lower than the first part 61.

With this configuration, the possibility that foreign matter that has penetrated into the extension cord 1 will pass through the gap G1 (see FIG. 1) surrounded by the first part 61 and the second part 62 is increased. In other words, by ensuring the passage of foreign objects, the possibility of foreign objects contacting the wiring board A1 can be reduced. Therefore, it is possible to suppress the decrease in electrical reliability in the case of foreign matter intrusion. In the following, as a foreign object that has penetrated into the extension cord 1, it is assumed to be a "liquid" such as water (including water droplets, dew condensation water, etc.) or beverages. However, in addition to liquid, the foreign matter may be solid matter such as dust or food residue.

(2) Details (2﹒1) premise Hereinafter, the extension cord 1 of this embodiment will be described in detail with reference to FIGS. 1 to 7. In the following, unless otherwise stated, the up and down, left and right, and front and rear directions of the extension cord 1 are defined by using the arrows showing up, down, left and right, and front and back in FIG. 2 for description. That is, for one example, the longitudinal direction of the casing 3 (the main body 40 and the cover 50) of the extension cord 1 is the front-rear direction, and the short-side direction (width direction) of the casing 3 is the left-right direction. The insertion direction of the conductor 202 of the plug 200 is downward. Here, the first direction D1 corresponds to the front-rear direction, and the second direction D2 corresponds to the left-right direction. In addition, the arrangement direction D3 corresponds to the up-down direction. However, these directions are not intended to limit the use direction of the extension cord 1. Furthermore, the arrows indicating the directions in the drawings are just for illustration and do not have any substance. In this embodiment, it is assumed that the extension cord 1 is placed on a horizontal surface such as a desk and described, but it is not particularly limited.

(2﹒2) Overall composition The extension cord 1, as shown in FIG. 2, is provided with a casing 3 that is elongated along the first direction D1, a patch panel A1 (refer to FIG. 3) accommodated in the casing 3, a power cable 5, and a partition Switch S1. The casing 3 is composed of a main body 40 and a cover 50.

(2﹒3) Ontology As shown in FIG. 6, the main body 40 has an opening 40A and an internal space SP1 connected to the opening 40A, and has an elongated shape along the first direction D1.

Specifically, the main body 40 is formed of a thermoplastic resin such as PCABS resin. The main body 40 has a substantially rectangular parallelepiped shape extending in the front-rear direction, and is a box-like shape with an opening 40A on the top surface and a certain depth. The main body 40, as shown in FIG. 1, has a cup-shaped cross section cut along the second direction D2 and the arrangement direction D3. The main body 40 has a size larger than the cover 50 in the arrangement direction D3, so it is easy to accommodate the entire wiring board A1 on the main body 40 side, and the assemblability of the extension cord 1 is improved.

As shown in FIG. 2, the main body 40 has a bottom wall 41, a left side wall 42, a right side wall 43, a front side wall 44, and a rear side wall 45. The internal space SP1 is a space surrounded by the bottom wall 41, the left side wall 42, the right side wall 43, the front side wall 44, and the rear side wall 45. As shown in FIG. 1, the main body 40 includes a pair of inner side surfaces 401 (here, corresponding to inner surfaces of the left side wall 42 and the right side wall 43 ), which face each other in the second direction D2 with the inner space SP1 interposed therebetween.

The bottom wall 41 is in the shape of an elongated elliptical plate along the front-rear direction. The left side wall 42 and the right side wall 43 are erected upward from both ends in the short side direction (left and right direction) of the bottom wall 41. The front side wall 44 and the rear side wall 45 are erected upward from both ends in the longitudinal direction (front-rear direction) of the bottom wall 41.

The front side wall 44 is, for example, curved along the arc shape of the front end of the bottom wall 41 into a semi-cylindrical shape protruding forward. The rear side wall 45 is, for example, curved along the arc shape of the rear end of the bottom wall 41 into a semi-cylindrical shape protruding rearward. The bottom wall 41 is formed, for example, to be slightly smaller than the opening 40A of the top surface. Therefore, the left side wall 42, the right side wall 43, the front side wall 44, and the rear side wall 45 are inclined toward the bottom wall 41 side from the opening 40A side toward the inside of the main body 40.

The internal space SP1, as shown in FIG. 5B, has a plurality of (for example, seven) divisional areas 15 arranged along the first direction D1 (front-rear direction). Hereinafter, the seven division areas 15 may be referred to as the first to seventh division areas 15A to 15G in order from the front side to the back side. The cutoff switch S1 (refer to FIG. 5A) is arranged in the seventh division area 15G. The patch panel A1 is arranged in the first to sixth divisional areas 15A to 15F. Especially in the patch panel A1, the parts corresponding to the three sockets 2 (a pair of clamping bases 70A, 70B, clamping base 90, etc.) are arranged so as to correspond to the 4th to 6th division areas 15D one-to-one. ~15F. In the patch panel A1, the circuit section H1 is arranged to extend across the first to third divisional areas 15A to 15C.

The rear side wall 45 has a through hole 4 (see FIG. 6) through which the power cable 5 is inserted in the thickness direction thereof. The through hole 4 is provided in the center of the rear side wall 45, for example. The contour of the opening of the through hole 4 is, for example, circular. The entire circle of the contour of the opening of the through hole 4 is closed. Since the entire circle of the through hole 4 is closed, it is not easy to reduce the strength and rigidity of the main body 40.

The main body 40, as shown in FIG. 1, has an outer peripheral edge portion 40C and an inner peripheral edge portion 40D as a peripheral edge portion 40B of the opening 40A. The outer peripheral portion 40C is the outer half of the peripheral portion 40B in the width direction; the inner peripheral portion 40D is the inner half of the peripheral portion 40B in the width direction. The inner peripheral edge portion 40D is slightly shorter than the outer peripheral edge portion 40C. Thereby, a step portion 40E is formed between the outer peripheral edge portion 40C and the inner peripheral edge portion 40D. Once the opening 40A of the main body 40 is closed with the cover 50, the later-described outer side wall portion 51 of the cover 50 is caught on the step portion 40E.

The main body 40, as shown in FIGS. 3 and 5B, further has: a plurality of ribs 6, a first clamping wall portion J1, a plurality of fixing portions B1 (screws), a plurality of protrusions L1, a plurality of first Mounting wall M1, plural second mounting walls M2, plural supporting ribs M3, and partition Q1.

A plurality of (four in this case) first mounting walls M1 are located in the third division area 15C and protrude upward from the bottom surface 400 (refer to FIG. 5B). The four first mounting walls M1 are divided into two on the inner surface side of the left side wall 42 and two on the inner surface side of the right side wall 43 respectively. Among the four first mounting walls M1, the two on the left side are arranged in the front-rear direction and are integrally formed with the inner surface of the left side wall 42. Furthermore, among the four first mounting walls M1, the two on the right side are arranged in the front-rear direction and are integrally formed with the inner surface of the right side wall 43. The first substrate H11 in the circuit section H1 has its bottom surface in contact with the four first mounting walls M1, and is sandwiched from the vertical direction by the first protruding wall 58 described later by the cover 50. Positioning.

The partition Q1 protrudes upward from the bottom surface 400. The partition Q1 has a substantially rectangular plate shape, and the thickness direction thereof is along the first direction D1. The partition Q1 is arranged to partition the first division area 15A and the second division area 15B. The protrusion amount of the partition Q1 from the bottom surface 400 is approximately equal to the protrusion amount of the fixing portion B1. The partition Q1 has a mounting part Q10 (refer to FIG. 6) which protrudes further from the center of the left-right direction at the upper end.

A plurality of (here, two) second mounting walls M2 are located in the first division area 15A, and protrude upward from the bottom surface 400. Here, the two second mounting walls M2 are integrally formed with the bottom surface 400 and the inner surface of the front side wall 44, and extend upward along the inner surface of the front side wall 44. The protrusion amount of the second mounting wall M2 from the bottom surface 400 is approximately equal to the size from the bottom surface 400 to the upper end of the mounting portion Q10. That is, the protrusion amount of the second mounting wall M2 from the bottom surface 400 is approximately equal to the protrusion amount of the fixing portion B1. The second substrate H12 in the circuit section H1 has its bottom surface in contact with the two second mounting walls M2 and the mounting portion Q10, and the second protruding wall 59 described later is covered by these and the cover 50 from the vertical direction Clamped to be positioned.

A plurality of (here, three) supporting ribs M3 are located in the 4th to 6th division areas 15D to 15F, and each protrudes upward from the bottom surface 400 (refer to FIG. 5B). Furthermore, three supporting ribs M3 are formed integrally with the inner surface of the right side wall 43. Each supporting rib M3 is formed in a strip-shaped plate shape elongated in the vertical direction as a whole. Each support rib M3 is arranged so that the thickness direction thereof faces the first direction D1. Each support rib M3 has a flat plate-shaped part whose thickness direction faces the second direction D2 at its left end, and this flat-plate part contacts the grounding conductive part 12 on the right side of the guide piece part 91 described later to The guide piece 91 is positioned with respect to the left-right direction.

The plurality of ribs 6 are constructed to reinforce the rigidity and strength of the main body 40. The plurality of ribs 6 includes: a plurality of (for example, five) first ribs 6A along the second direction D2, a plurality of (for example, two) second ribs 6B along the first direction D1, and a pair of third ribs 6C .

The five first ribs 6A are substantially U-shaped plates when viewed along the first direction D1, and extend from the bottom surface 400 to the pair of inner side surfaces 401. In other words, each of the first ribs 6A protrudes inward from the inner surfaces of the bottom wall 41, the left side wall 42, and the right side wall 43. The left and right upper ends of the U-shape of each of the first ribs 6A extend to the vicinity of the peripheral edge portion 40B.

The five first ribs 6A, as shown in FIG. 5B, are arranged so as to separate adjacent divided areas of the second to seventh divided areas 15B to 15G. Among the five first ribs 6A, the first rib 6A located at the foremost position is separated by two fixing portions B1. Furthermore, among the five first ribs 6A, the third and fourth first ribs 6A are each separated by a fixing portion B1.

The two second ribs 6B protrude upward from the bottom surface 400. The two second ribs 6B are arranged in the front-rear direction and are arranged shifted from each other in the left-right direction. When viewed along the second direction D2, each of the second ribs 6B has an elongated rectangular plate shape along the first direction D1. Among the two second ribs 6B, the front second rib 6B extends from the partition Q1 to the rearmost first rib 6A among the five first ribs 6A. However, the second rib 6B on the front side is divided by two fixing portions B1. Among the two second ribs 6B, the second rib 6B on the rear side extends from the rearmost first rib 6A among the five first ribs 6A to the first clamping wall portion J1.

The pair of third ribs 6C are arranged on a pair of inner side surfaces 401 (the inner surfaces of the left side wall 42 and the right side wall 43) in an area corresponding to the seventh division area 15G. The pair of third ribs 6C are opposed to each other in the second direction D2. The pair of third ribs 6C each protrude from the pair of inner side surfaces 401 toward the direction (inside) approaching each other. The pair of third ribs 6C, when viewed along the first direction D1, are in the shape of a long plate extending along the arrangement direction D3, and extend from the vicinity of the bottom surface 400 to the vicinity of the peripheral edge portion 40B.

The five first ribs 6A and the pair of third ribs 6C are formed such that the upper ends 600 (refer to FIG. 1) are positioned between the outer peripheral edge portion 40C and the inner peripheral edge portion 40D of the peripheral edge portion 40B of the main body 40. Furthermore, each upper end 600 is provided with a recessed portion 601 (refer to FIG. 1) for covering the outer side wall portion 51 of the cover 50. The bottom surface of the concave portion 601 is flat and connected with the inner peripheral edge portion 40D of the main body 40. Thereby, once the opening 40A of the main body 40 is sealed with the cover 50, the lower end of the side wall 51 outside the cover 50 will fit between the recess 601 and the height difference portion 40E. As a result, the positioning of the cover 50 relative to the main body 40 can be achieved.

The first clamping wall portion J1 is an area corresponding to the seventh division area 15G of the bottom surface 400, and is provided on the back side of the through hole 4 of the main body 40 (that is, the back side of the rear side wall 45). The first clamping wall portion J1 protrudes from the bottom surface 400 in a wall shape to the vicinity of the lower end of the opening of the through hole 4. The first clamping wall portion J1 is to pass through the through hole 4 of the main body 40 and to pull the power cable 5 from the outside of the main body 40 into the inside, and is inserted between the second clamping wall portion J2 described later of the cover 50 Clamped components. In this embodiment, the first clamping wall portion J1 and the second clamping wall portion J2 constitute a clamping portion 17 for clamping the power cable 5 passing through the through hole 4. By clamping the power cable 5 with the clamping portion 17, even if the power cable 5 is pulled outside the casing 3, the clamping portion 17 can still restrain the tension at this time. As a result, even if the power cable 5 is pulled, the interruption of the connection between the patch panel A1 and the power cable 5 in the casing 3 can be suppressed.

A plurality of (6 here) fixing parts B1 (screw posts) are the parts that fasten the cover 50 to the screw posts 54 described later to fix the main body 40 and the cover 50 to each other. Each fixing portion B1 protrudes upward from the bottom surface 400. The six fixing parts B1 are arranged so as to be dispersed over the entire bottom wall 41.

For example, among the six fixed portions B1, the two fixed portions B1 located on the front side are arranged side by side along the second direction D2 as shown in FIG. 5B so as to separate the second division area 15B and the third division The first rib 6A of the area 15C is divided. Furthermore, among the six fixing portions B1, the two fixing portions B1 located approximately in the center are arranged so that the first rib 6A that separates the fourth division area 15D and the fifth division area 15E, and the division The first rib 6A of the fifth division area 15E and the sixth division area 15F are divided. Furthermore, among the six fixing portions B1, the two fixing portions B1 located on the rear side are arranged in the seventh division area 15G, and each is formed integrally with the left and right ends of the first clamping wall portion J1.

Each fixing portion B1 is provided with a through hole B10 penetrating along the central axis thereof. The through hole B10 is a hole for passing a screw for fixing the body 40 and the cover 50 to each other. The through hole B10 further penetrates the bottom wall 41 to connect the internal space SP1 with the outside of the main body 40. In other words, the main body 40 has a fixing portion B1 on the bottom surface 400 for fixing the cover 50 and the main body 40.

A plurality of (for example, 9) protrusions L1 are in a state where the cover 50 seals the opening 40A of the main body 40, and contacts the bottom surface of the core portion 13 in the patch panel A1. The protruding portion L1 is a portion that, together with the positioning portion 55 of the cover 50 described later, positions the core portion 13 of the patch panel A1 in the vertical direction of the main body 40. Each protrusion L1 protrudes from the bottom surface 400 in a substantially cylindrical shape. The nine protrusions L1 are divided into 4th to 6th division areas 15D to 15F, and three are arranged in each.

At this point, the main body 40 is further equipped with a discharge part E0 on the bottom surface 400 to discharge the foreign matter (liquid here) that has penetrated into the internal space SP1 to the outside of the main body 40. As shown in FIG. 5B, the discharge part E0 includes a first discharge hole E1 and a second discharge hole E2.

The first discharge hole E1, as shown in FIG. 7, is located at the base (root) of the fixed portion B1 located in the boundary between the fourth division area 15D and the fifth division area 15E. The first discharge hole E1 is located at the base of the fixed portion B1 located in the fourth division area 15D, and has an opening thereof. The first discharge hole E1 connects the internal space SP1 with the outside of the main body 40. The first discharge hole E1, as shown in FIG. 5B, is arranged substantially in the center of the main body 40 in the first direction D1.

Near the opening of the first discharge hole E1 on the bottom surface 400, a barrier wall 402 protrudes upward; when the bottom surface 400 is viewed from the front, the barrier wall 402 is arc-shaped. Therefore, even if foreign objects other than liquid are directed toward the first discharge hole E1, there is a high possibility that they will be intercepted by the barrier wall 402, and it is possible to prevent the first discharge hole E1 from being blocked by foreign objects other than the liquid.

The second discharge hole E2, as shown in FIG. 5B, is arranged in the center in the first division area 15A of the bottom surface 400. The second discharge hole E2 connects the internal space SP1 with the outside of the main body 40. Furthermore, the main body 40 has a cylindrical barrier wall 403 on the bottom surface 400; when the bottom surface 400 is viewed from the front, the outline of the barrier wall 403 protrudes upward in a cannonball shape. The second discharge hole E2 is formed in an area surrounded by the barrier wall 403. Furthermore, the barrier wall 403 has a tongue portion 404 protruding from the inner surface thereof, and the tongue portion 404 covers a part of the opening of the second discharge hole E2 when the bottom surface 400 is viewed from the front. Therefore, even if foreign objects other than liquid are directed toward the second discharge hole E2, there is a high possibility that they will be intercepted by the barrier wall 403 and the tongue 404, and it is possible to prevent the second discharge hole E2 from being blocked by foreign objects other than the liquid. .

(2﹒4) Cover The cover 50 is formed of thermoplastic resin such as polycarbonate resin. As shown in FIGS. 2 to 4, the cover 50 is in the shape of an elongated elliptical plate along the first direction D1. The outer surface 500 of the cover 50 becomes the top surface of the casing 3.

Hereinafter, as shown in FIG. 2, the outer surface 500 of the cover 50 is divided into a first area 37 and a second area 38 for description. The first area 37 and the second area 38 are arranged in the front-rear direction. The first area 37 is an area on the front side than the second area 38. The length dimension of the first area 37 in the front-rear direction is approximately 4 times the length dimension of the second area 38 in the front-rear direction. Both the first area 37 and the second area 38 are substantially flat surfaces. However, there is a height difference between the first area 37 and the second area 38, and the first area 37 is higher than the second area 38 relative to the main body 40.

The cover 50 is approximately the same shape and the same size as the opening 40A of the main body 40 (more specifically, the same shape and a size only slightly smaller than the opening 40A). The outer peripheral portion 50A (the lower end portion of the outer wall portion 51) of the cover 50 can be fitted inside the opening 40A of the main body 40 (refer to FIG. 1). By fitting the outer peripheral portion 50A of the cover 50 to the inside of the opening 40A of the main body 40, the opening 40A is sealed by the cover 50. In this way, by fitting the outer peripheral portion 50A of the cover 50 to the inside of the opening 40A of the main body 40, the outer peripheral portion 50A of the cover 50 is protected by the main body 40.

The cover 50 has three insertion openings 21A and two insertion openings 21B corresponding to the three sockets 2 respectively, and an exposure window 18 (refer to FIG. 3) that exposes the operating portion of the cutoff switch S1.

The three insertion ports 21A and the two insertion ports 21B are arranged in the first area 37 of the outer surface 500 of the cover 50. Specifically, the two insertion ports 21B are located near the front end of the first area 37 and are arranged along the first direction D1; and the three insertion ports 21A are located slightly behind the two insertion ports 21B. It is arranged along the first direction D1.

Each insertion port 21A has three insertion holes 21a, 21b, and 21c penetrating in the thickness direction of the cover 50. As shown in FIG. The parts corresponding to the three sockets 2 (a pair of clamping bases 70A, 70B, clamping base 90, etc.) are each accommodated in the 4th to 6th division areas 15D-15F of the internal space SP1, and are arranged so as to correspond to 3 The two insertion ports 21A face each other.

The two insertion ports 21B are penetrated in the thickness direction of the cover 50. Each insertion port 21B has, for example, a rectangular opening whose longitudinal direction is along the left-right direction. The two USB connectors C1 are accommodated in the first division area 15A of the internal space SP1, and are arranged so as to face the two insertion ports 21B.

The exposure window 18 has a rectangular shape, for example, and is provided in a predetermined area (for example, the left half area) in the second area 38 of the outer surface 500 of the cover 50. The exposure window 18 is opposed to the seventh division area 15G of the internal space SP1. The cutoff switch S1 is located in the seventh division area 15G, and is arranged so as to be exposed from the exposure window 18.

The cover 50, as shown in FIG. 4, has an outer wall portion 51, an inner wall portion 52, a second clamping wall portion J2, a plurality of (6 in this case) screw posts 54, and a plurality of ( Here are 9) positioning parts 55 and a plurality of temporary fixing parts 56. Furthermore, the cover 50 further has a plurality of protruding ribs 57, a plurality of (four in this case) first protruding walls 58, and a plurality of (four in this case) second protruding walls.壁59. The second clamping wall portion J2 is a member for clamping the power cable 5 between it and the first clamping wall portion J1 of the main body 40.

Here, the power cable 5 has a plurality of (for example, three) electric wires 5A, 5B, 5C, and an outer cover 5D (refer to FIGS. 3 and 4). Each of the three wires 5A, 5B, and 5C are insulated wires. The outer cover 5D is a member in which three electric wires 5A, 5B, and 5C are bundled and covered. The wire 5A is electrically connected to the electrode portion 10A, the wire 5B is electrically connected to the electrode portion 10B, and the wire 5C is electrically connected to the conductive portion 12 for grounding.

Six screw posts 54 protrude downward from the back 501 of the cover 50. The six screw posts 54 are arranged so as to face each of the six fixing parts B1 (screw posts) one-to-one. Each screw post 54 has a bottomed screw hole 540 that is recessed upward from the lower end surface along the central axis. The main body 40 and the cover 50 are fixed to each other by passing the screws through the through holes B10 of the fixing parts B1 from the outside of the main body 40 and screwing them to the screw holes 540 of the opposite screw posts 54.

The outer wall portion 51 and the inner wall portion 52 are parts that reinforce the rigidity and strength of the cover 50. The outer wall portion 51 and the inner wall portion 52 are provided so as to protrude downward from the back surface 501 of the cover 50. The outer side wall portion 51 is arranged to extend over the entire circumference of the back surface 501 of the cover 50 (that is, the entire circle direction). The inner wall portion 52 is located on the inner side of the outer wall portion 51, is spaced apart from the outer wall portion 51, and is provided along the circular edge direction of the cover 50. In this way, the outer wall portion 51 and the inner wall portion 52 are formed to extend over the entire circular edge direction of the cover 50 to improve the strength and rigidity of the cover 50.

As shown in FIG. 1, the protrusion amount of the inner wall portion 52 relative to the back surface 501 of the cover 50 is greater than the protrusion amount of the outer wall portion 51 relative to the back surface 501 of the cover 50. Thereby, the outer side wall portion 51 and the inner side wall portion 52 will not easily interfere with the inner peripheral surface of the main body 40.

The nine positioning parts 55 are parts for positioning the core part 13 at the position of the back 501 of the cover 50. The core portion 13 is a member that holds the clamping seats 70A, 70B, and 90 described later.

The nine positioning parts 55 are arranged in the fourth to sixth division regions 15D to 15F of the internal space SP1. As shown in FIG. 4, each positioning portion 55 has a cylindrical portion 550 protruding in a substantially cylindrical shape from the back surface 501 of the cover 50, and a contact wall 551 formed integrally with the cylindrical portion 550. Each positioning portion 55 is in a state in which the opening 40A of the main body 40 is sealed with the cover 50, so that the cylinder portion 550 is inserted into the positioning hole 134 formed in the core portion 13 of the wiring board A1, and is brought into contact with the wall 551 It contacts the peripheral edge of the positioning hole 134 of the core portion 13. The nine positioning portions 55 together with the nine protrusions L1 of the main body 40 sandwich the three core portions 13 on the patch panel A1 in the vertical direction, so that the core portions 13 can be positioned stably.

The plural temporary fixing parts 56 are parts for temporarily fixing the electric wires 5A, 5B, and 5C to the cover 50. The plurality of temporary fixing parts 56 are arranged in the seventh division area 15G of the internal space SP1. Each temporary fixing portion 56 protrudes downward in a wall shape from the back surface 501 of the cover 50. The wires 5A, 5B, and 5C are easily pulled by being temporarily fixed to a plurality of temporary fixing parts 56; in addition, when the power cable 5 is pulled, the current tension causing the wire to be broken can be suppressed.

The plurality of protruding ribs 57 are arranged in the fourth to sixth division regions 15D to 15F of the internal space SP1. The plural protruding ribs 57 are the parts that contact the three core parts 13 of the patch panel A1 from the upper side. Each protruding rib 57 is provided in a wall shape so as to protrude downward from the back surface 501 of the cover 50. The plurality of protruding ribs 57 sandwich the three core parts 13 in the up-down direction together with the nine positioning parts 55 and the nine protruding parts L1 of the main body 40, so that each core part 13 can be positioned stably.

The four first protruding walls 58 are arranged at the four corners on the front, back, left, and right of the third division area 15C of the internal space SP1. The four first protruding walls 58 contact the four corners of the front, back, left and right of the first substrate H11 in the circuit section H1 from the upper side. Each first protruding wall 58 protrudes downward in a columnar shape from the back surface 501 of the cover 50. Among the four first protruding walls 58, the two first protruding walls 58 located on the rear side are formed integrally with the inner wall portion 52. The four first protruding walls 58 sandwich the first substrate H11 in the vertical direction together with the four first mounting walls M1 of the main body 40, so that the first substrate H11 can be positioned stably.

The four second protruding walls 59 are arranged in the first division area 15A of the internal space SP1. The four second protruding walls 59 contact the front end, the left and right ends, and the rear end of the second substrate H12 of the circuit section H1 from the upper side. Each second protruding wall 59 protrudes downward in a rectangular plate shape from the back surface 501 of the cover 50. Among the four second protruding walls 59, the second protruding wall 59A located on the rear side, as shown in FIG. 4, has two recesses 590 for inserting a plurality of lead wires 121 at its lower end. The lead 121 electrically connects the first substrate H11 and the second substrate H12. The four second protruding walls 59 sandwich the second substrate H12 in the vertical direction together with the two second mounting walls M2 of the main body 40 and the mounting portion Q10, so that the second substrate H12 can be stably positioned.

(2﹒5) Plug-in board The patch panel A1, as shown in FIG. 3, FIG. 4, and FIG. 5A, has an electrode portion 10A, an electrode portion 10B, a conductive portion 12 for grounding, three core portions 13, and a circuit section H1. The patch panel A1 is accommodated in the internal space SP1 and is electrically connected to the conductor 202 inserted from the insertion port 21.

The electrode parts 10A and 10B are each electrically connected to one of the pair of electrodes 202A of the first plug P1 inserted into the socket 2. Each of the electrode portions 10A and 10B is formed of a conductive member (for example, metal; more specifically, for example, a copper alloy).

The electrode part 10A has three clamping seats 70A and a strip-shaped plate-shaped guide piece part 80A. In addition, the electrode portion 10B has three clamping seats 70B and a strip-shaped plate-shaped guide piece portion 80B. One clamping base 70A and one clamping base 70B constitute a connecting portion 70 and are provided in each socket 2.

In the electrode portion 10A, the three clamping seats 70A and the guide piece portion 80A are formed of separate components; each of the clamping seats 70A is connected to the guide piece portion 80A by an appropriate connection method (such as tenon riveting). Similarly, in the electrode part 10B, the three clamping seats 70B and the guide piece portion 80B are formed by separate members; each clamping seat 70B is connected to the guide piece portion by an appropriate connection method (such as tenon riveting) 80B connection.

The three connection parts 70 correspond to the three sockets 2 one-to-one. The clamping base 70A and the clamping base 70B of each connecting portion 70 are arranged in the casing 3 so as to face the corresponding insertion holes 21a and 21b of the socket 2 respectively. One of the pair of electrodes 202A of the first plug P1 inserted into the socket 2 is electrically connected to one of the three connecting portions 70. The holding seats 70A and 70B of each connecting portion 70 correspond one-to-one to the pair of electrodes 202A of the first plug P1. The three connecting portions 70 are arranged one in each of the fourth to sixth divisional regions 15D to 15F.

Each of the clamping base 70A and the clamping base 70B is configured to clamp the corresponding electrode 202A in the first plug P1 (the blade in the example shown in the figure) to achieve electrical and mechanical connection with the electrode 202A connection. Each of the clamping base 70A and the clamping base 70B has a plurality of (for example, 3) protrusions, which can be clamped regardless of whether the electrode 202A is a blade or a cylindrical pin. The clamping base 70A and the clamping base 70B are formed to have the same shape and the same size. In other words, these systems are formed as mutually common parts.

The guide pieces 80A and 80B are arranged so as to extend substantially across the fourth to seventh divisional regions 15D to 15G, with the thickness direction thereof directed in the arrangement direction D3, and the longitudinal direction thereof along the first direction D1. The guide piece portions 80A and 80B are arranged at predetermined intervals in the left-right direction, and are shifted from each other in the longitudinal direction (the guide piece portion 80B is slightly shifted backward). The guide pieces 80A and 80B are located on the lower side of the three core parts 13 and are placed on a pair of first parts 61 described later. At the rear end of the guide piece 80A, the electric wire 5A is electrically connected; and at the rear end of the guide piece 80B, the electric wire 5B is electrically connected. The pair of guide pieces 80A and 80B are formed to have the same shape and the same size. That is, the pair of guide piece portions 80A and 80B are formed as mutually common components. On the way of the electric wire 5B, a disconnect switch S1 is inserted.

The conductive portion 12 for grounding is a member that is electrically connected to the ground terminal 202B of the first plug P1 inserted into the socket 2. The conductive portion 12 is formed of a conductive member (for example, metal; to be more specific, for example, brass). The conductive portion 12 has three clamping seats 90 and a guide piece portion 91. The three clamping seats 90 are formed integrally with the guide piece portion 91. The conductive portion 12 is formed, for example, by bending a metal plate.

The three clamping seats 90 correspond to the three sockets 2 one-to-one. The three clamping seats 90 are arranged in the casing 3 so as to face the three insertion holes 21c. Each clamping seat 90 is a member that is electrically connected to the ground terminal 202B of the first plug P1 inserted into the socket 2. Each clamping base 90 is configured to clamp the ground terminal 202B to achieve an electrical and mechanical connection with the ground terminal 202B.

The guide piece 91 is in the shape of a strip plate. The guide piece part 91 is arrange|positioned so that it may extend substantially in the 4th-7th divisional area|region 15D-15G so that the thickness direction may face the 2nd direction D2, and the longitudinal direction may follow the 1st direction D1. The guide piece part 91 is arranged along the right side surface of the three core parts 13. The electric wire 5C is electrically connected to the rear end of the guide piece 91. As described above, the guide piece portion 91 is integrally formed with the three clamping seats 90, so the guide piece portion 91 is supported by the three core portions 13 via the three clamping seats 90. In particular, the guide piece portion 91, as described above, has three support ribs M3 contacting on its right side, and the three core portions 13 and the three support ribs M3 are positioned stably in the casing 3.

The three core parts 13 correspond to the three sockets 2 one-to-one. Each core portion 13 is a portion that holds the connecting portion 70 (clamping base 70A, 70B) and the clamping base 90 in the corresponding socket 2. The three core parts 13 are arranged one in each of the fourth to sixth divisional regions 15D to 15F. The three core parts 13 are formed to have the same shape and the same size. That is, the three core parts 13 are formed as mutually common parts. Each core portion 13 is formed in, for example, a substantially rectangular parallelepiped shape. Each core portion 13 is formed of, for example, a thermosetting resin such as urea resin. Each core portion 13 has three accommodating recesses for separately accommodating the three clamping seats 70A, 70B, and 90 while being electrically insulated from each other. Furthermore, each core portion 13 has three positioning holes 134. As described above, the corresponding cylinder portion 550 in the cover 50 is inserted into each positioning hole 134.

As shown in FIG. 3, in each connection part 70, the resin-made door piece 71 which covers the insertion hole 21a, 21b is arrange|positioned at the back side of the cover 50. As shown in FIG. The door piece 71 is stored in a state of being urged by the coil spring 72. By pushing the pair of electrodes 202A of the first plug P1 against the door piece 71, it opposes the pressing force of the coil spring 72 and slides the door piece 71 to the left, so that the first plug P1 is connected. In short, when the socket 2 is not in use, the insertion holes 21a and 21b are covered by the door piece 71.

The circuit section H1, as shown in FIG. 3, FIG. 4, and FIG. 5A, has a first substrate H11 and a second substrate H12 electrically connected to each other by a plurality of leads 121, and various electronic components 16 embedded in these substrates. .

The first board H11 is a printed wiring board, and a plurality of electronic components 16 constituting a conversion circuit are embedded. The first substrate H11 is arranged in the third division area 15C. The conversion circuit, for example, uses the AC power (for example, 100V) received from the electrode parts 10A and 10B to generate a high-frequency AC voltage, and then uses a diode and an electrolytic capacitor to generate a rectified and smoothed DC voltage . Then, the conversion circuit will output a stabilized DC voltage (for example, 5V) by switching and adjusting the generated DC voltage. In short, the conversion circuit is configured to convert AC power from the side of the electrode portions 10A and 10B into DC power. One pair of AC input terminals of the conversion circuit, as shown in FIG. 3, is electrically connected to the electrode parts 10A and 10B via the lead wires 120 and 120, respectively. The conversion circuit supplies a stabilized 5V DC voltage to the H12 side of the second substrate through the DC output terminal.

As shown in FIGS. 3 and 5A, the second board H12 is a printed wiring board in which two USB connectors C1 are embedded on the top surface (embedded surface). The second substrate H12 is arranged in the first division area 15A. Each USB connector C1 is a connector (slot) that can be connected to the second plug P2 (for example, a USB Type-A plug). The conductor 202C of the second plug P2 is electrically connected to the USB connector C1, and DC power is supplied to the conductor 202C. However, the type of USB connector is not particularly limited. In this embodiment, a pair of USB connectors C1 are arranged on the second board H12 in the same orientation. That is to say, the plastic substrates of the 4 terminals (VBUS, -DATA, +DATA, GND) in a pair of USB connector C1 have been formed, and the orientations are the same, so that each is along the left and right directions. The power terminal (VBUS) and the ground terminal (GND) of each USB connector C1 are each connected to a wiring conductor (for example, copper foil) formed on the second substrate H12 by soldering. Each USB connector C1 is electrically connected to the DC output terminal of the first substrate H11 via the wiring conductor of the second substrate H12, a plurality of leads 121, and the like. Here, the first substrate H11 corresponds to the high-current side substrate; the second substrate H12 corresponds to the weak-current side substrate, and is supplied with a low DC voltage of about 5V.

(2﹒6) Disconnect switch The cut-off switch S1 is inserted into a contact on the way of electrically connecting to the wire 5B of the electrode part 10B; by switching the contact between the closed state and the open state, the wire 5B is connected or disconnected. The cut-off switch S1 can also be inserted into a contact on the way of electrically connecting to the wire 5A of the electrode part 10A, so that the wire 5A is connected or disconnected. The cut-off switch S1 can manually switch the state of the contact through the operating part exposed by the exposure window 18. Furthermore, as long as a current (that is, an overcurrent) above a predetermined current value flows in the wire 5B, the cut-off switch S1 will automatically switch the contact from the closed state to the open state, and cut off the energized state of each wire 5B ( Overcurrent prevention function).

(2﹒7) The passage of foreign objects At this point, in the extension cord 1, there is a possibility that foreign matter (set as liquid here) may penetrate into the casing 3 through the plurality of insertion ports 21 (21A, 21B) of the cover 50, etc., for example.

For example, when a foreign object enters the case 3 from the two insertion ports 21B each facing the two USB connectors C1, the foreign object will fall to the top surface of the second substrate H12 located in the first division area 15A . Even if the liquid is spilled on the second substrate H12 (low-current side substrate), it is only to the extent that the USB connector C1 has poor contact, and it is unlikely to cause damage to various electronic components, or a reduction in insulation and a reduction in reliability.

The foreign matter passes through the top surface of the second substrate H12 and falls below the second substrate H12. Here, since the second discharge hole E2 of the discharge portion E0 is provided below the second substrate H12, the foreign matter that has penetrated into the first division area 15A is discharged from the second discharge hole E2.

In particular, at the boundary between the first division area 15A and the second division area 15B, a relatively high partition Q1 extending to the bottom surface of the second substrate H12 is provided. As a result, the foreign matter in the first divided region 15A is suppressed from spreading to the second divided region 15B side, that is, the first substrate H11 (high-voltage side substrate) side.

Furthermore, even if foreign matter intrudes into the second to seventh divisional areas 15B to 15G, since a plurality of ribs 6 are provided between adjacent divisional areas 15, the spread of the foreign matter can be prevented.

Here, among the five first ribs 6A, we will focus on the boundary between the fourth division area 15D and the fifth division area 15E, and the boundary between the fifth division area 15E and the sixth division area 15F The two first ribs 6A (hereinafter, these will be referred to as "specific ribs 6X" (refer to Figure 6)). Since the two specific ribs 6X are approximately the same shape and the same size, the specific rib 6X located in the front will be described with reference to FIGS. 1 and 6.

As shown in FIG. 1, the specific rib 6X has a wall 60 and a pair of extension pieces 63 arranged in the second direction D2 (left-right direction). In other words, the main body 40 has a wall 60 along the second direction D2 on the bottom surface 400 of the internal space SP1.

The wall portion 60 is arranged in the second direction D2 with the fixing portion B1 (screw post) sandwiched therebetween. The wall portion 60 is formed integrally with the fixing portion B1.

Here, the wall portion 60 has a pair of first portions 61 and a pair of second portions 62, respectively. The pair of second parts 62 are arranged in the second direction D2 with the pair of first parts 61 sandwiched therebetween. Here, as an example, the first part 61 (61A) and the second part 62 (62A) located on the left side of the fixing part B1 are formed integrally with each other, and the front surfaces become a plane with each other, and similarly After this, the surfaces become a plane with each other. Furthermore, the first part 61 (61B) and the second part 62 (62B) located on the right side of the fixing part B1 are integrally formed with each other, and the front surfaces form a plane with each other. Similarly, the rear surfaces Each other becomes a plane.

Each first portion 61 has a rectangular plate shape whose thickness direction faces the front-rear direction. The pair of first portions 61 are arranged in the second direction D2 with the fixing portion B1 sandwiched therebetween. The pair of first portions 61A and 61B are configured to contact a part of the patch panel A1 in the arrangement direction D3 (up and down direction). Here, as an example, the so-called "a part of the wiring board A1" corresponds to the lead part 80A of the electrode part 10A and the lead part 80B of the electrode part 10B. Specifically, the guide piece portion 80A is placed on the upper end portion of the first portion 61A, and the guide piece portion 80B is placed on the upper end portion of the first portion 61B. In short, the guide piece portions 80A and 80B restrict downward movement by a pair of first portions 61 and are positioned stably. Each first portion 61 is arranged on the center side of the bottom surface 400 in the second direction D2. Here, the pair of first portions 61A and 61B are formed integrally with the fixing portion B1.

The second part 62A is arranged between the left inner surface 401 and the first part 61A; the second part 62B is arranged between the right inner surface 401 and the first part 61B. In other words, each second part 62 is arranged between one of the pair of inner side surfaces 401 and the first part 61. Each second portion 62 has a rectangular plate shape whose thickness direction faces the front-rear direction. The upper end of each second part 62 is bent so as to go upward as the distance from the first part 61 is. The height of each second portion 62 with respect to the bottom surface 400 is configured to be lower than that of the first portion 61. The second part 62A is formed continuously protruding to the left from the lower left edge of the first part 61A; the first part 61A and the second part 62A, when viewed from the front, have a reverse L-shape as a whole. The second part 62B is continuously formed to protrude to the right from the lower right edge of the first part 61B; the first part 61B and the second part 62B are L-shaped as a whole when viewed from the front.

Since the position of the fixed portion B1 is slightly leftward from the center in the left-right direction, the second part 62B is formed longer than the second part 62A in the left-right direction.

Each extension piece 63 has a rectangular plate shape whose thickness direction faces the front-rear direction. Each extension piece 63 is formed integrally with the wall portion 60 on one (corresponding) of the pair of inner side surfaces 401, and extends toward the opening portion 40A. The left extension piece 63A of the pair of extension pieces 63 is formed continuously with the second part 62A; the right extension piece 63B of the pair of extension pieces 63 is formed continuously with the second part 62B. The upper end of each extension piece 63 corresponds to the upper end 600 of the above-mentioned first rib 6A.

In the present embodiment, when a foreign body having a height exceeding the second portion 62 penetrates into the extension line 1, it passes through the gap G1 surrounded by each first portion 61 and the second portion 62 of the partition wall (see FIG. 1; In this department 2) the possibility will become higher. In other words, in this embodiment, since the wall portion 60 has the first part 61 and the second part 62, by ensuring a passage (gap G1) for foreign matter at a lower side than the patch plate A1, foreign matter can be reduced. Possibility to touch the patch panel A1. Therefore, it is possible to suppress the decrease in electrical reliability in the case of foreign matter intrusion.

Here, the wall 60 is a part of the rib 6 configured to reinforce the rigidity and strength of the main body 40. That is, the wall portion 60 has both a structure to secure the gap G1, a structure to reinforce the main body 40, and a structure to position a part of the patch panel A1 (the guide piece portions 80A, 80B).

In addition, since the pair of first portions 61 are arranged to sandwich the fixing portion B1 in the second direction D2, it can also be used as a portion for reinforcing the fixing portion B1. Furthermore, by providing the extension piece 63 integrally formed with the wall portion 60, the wall portion 60 and the extension piece 63 can further strengthen the entire elongated body 40.

In addition, the first part 61 is arranged on the center side in the second direction D2, and the second part 62 is arranged between the inner surface 401 and the first part 61. As a result, the contact position between the first part 61 and the electrode part (10A or 10B) will be set on the center side, and the passage through which the invading foreign matter will pass can be set on the inner side 401 side. Therefore, the electrical resistance can be further suppressed. Decrease in reliability.

Furthermore, since the first discharge hole E1 of the discharge portion E0 is provided in the fourth compartment area 15D, foreign matter that has penetrated into the fourth compartment area 15D can be discharged from the first discharge hole E1. As a result, it is possible to further suppress the decrease in electrical reliability.

Among the five first ribs 6A, the rearmost first rib 6A has a wall 65 (refer to FIG. 6 ); the height of the wall 65 from the bottom surface 400 is approximately equal to the height of the first portion 61. On the upper end of the wall 65, the rear end of the guide piece 80B is placed. Furthermore, among the five first ribs 6A, the two first ribs 6A that are located farther forward than the two specific ribs 6X have a wall 66 (refer to FIG. 6); the wall 66 is calculated from the bottom surface 400 The height is approximately equal to the height of the second part 62. In other words, the height of the wall portion 66 is lower than that of the wall portion 65.

By configuring the five first ribs 6A in this way, the following structure is formed: foreign matter that has penetrated into the second to sixth division areas 15B-15F, as long as the amount does not exceed the second portion 62 or the wall portion 66 , It is not easy to move to the division area 15 next door. However, foreign matter that exceeds the second portion 62 or the wall portion 66 and enters the fourth division area 15D is discharged from the first discharge hole E1. Furthermore, a structure is formed in which the foreign matter that has penetrated into the sixth divisional area 15F does not easily move to the seventh divisional area 15G as long as the amount of intrusion does not exceed the wall 65 in a short time.

(3) Modifications The above-mentioned embodiment is only one of various embodiments of the present invention. As long as the purpose of the invention can be achieved, the above-mentioned embodiment can be modified in various ways according to the design and the like. Hereinafter, modified examples of the above-mentioned embodiment will be listed. The modified examples described below can be appropriately combined and applied. Hereinafter, the above-mentioned embodiment may be referred to as a "basic example".

In the basic example, the number of the first discharge holes E1 is one, but it is not particularly limited, and it may be two or more.

In the basic example, the wall 60 has a pair of first parts 61 and a pair of second parts 62; however, the number of the first part 61 and the number of the second part 62 may be one each or three. More than one. For example, the wall 60 may be configured in a comb-tooth shape in which the first part 61 and the second part 62 are alternately arranged.

In the basic example, each second part 62 is arranged between one of the pair of inner side surfaces 401 and the first part 61. However, for example, as shown in FIG. 8, the positional relationship between the second part 62 and the first part 61 may be reversed. That is, each first part 61 may be arranged between one of the pair of inner side surfaces 401 and the second part 62, and each second part 62 may be formed integrally with the fixing part B1.

In the basic example, the main body 40 is cup-shaped in cross section; the main body 40 has a size larger than the cover 50 in the arrangement direction D3. However, the main body 40 may also be arranged in the arrangement direction D3 and have a size approximately equal to that of the cover 50. The main body 40 and the cover 50 may also be in the shape of a flat rectangular box with the sides facing each other open.

In the basic example, the extension cord 1 can be connected to both the first plug P1 and the second plug P2, but can be connected to the second plug P2, which is not essential in the present invention and can be omitted.

(4) Summary As explained above, the extension cord (1) of the first aspect includes a main body (40), a cover (50), and a power strip (A1). The main body (40) has an opening (40A) and an internal space (SP1) connected to the opening (40A), and is elongated in the first direction (D1). The cover (50) has an insertion port (21) for inserting the conductor (202) of the plug (200), and covers the opening (40A). The patch panel (A1) is accommodated in the internal space (SP1) and is electrically connected to the conductor (202) inserted into the insertion port (21). The main body (40) has at least one wall (60) along the second direction (D2) crossing the first direction (D1) on the bottom surface (400) of the internal space (SP1). The wall part (60) has a first part (61) contacting a part of the wiring board (A1) in the arrangement direction (D3) in which the bottom surface (400) and the cover (50) are arranged, and a first part (61) opposite to the bottom surface ( The height of 400) is lower than that of the second part (62) of the first part (61). According to the first aspect, it is possible to suppress the reduction in electrical reliability in the case of foreign matter intrusion.

Regarding the extension line (1) of the second aspect, it is related to the first aspect, and its main body (40) includes a pair of inner sides (40) facing each other in the second direction (D2) across the inner space (SP1). 401). The first part (61) is arranged on the center side of the bottom surface (400) in the second direction (D2). The second part (62) is arranged between at least one of the pair of inner surfaces (401) and the first part (61). If the second aspect is adopted, the contact position between the first part (61) and the patch panel (A1) can be set on the center side of the bottom surface (400), and the path through which the invading foreign matter can pass can be set It is on the inner side (401) side, so it can further suppress the reduction of electrical reliability.

Regarding the extension line (1) of the third aspect, it is attached to the first aspect or the second aspect, and the wall portion (60) has a pair of first parts (61) and a pair of second parts (62), respectively . The pair of second parts (62) are arranged in the second direction (D2) with the pair of first parts (61) sandwiched therebetween. If the third aspect is adopted, the patch panel (A1) will be more stably positioned on the main body (40).

The extension line (1) of the fourth aspect is related to the third aspect, and the main body (40) has a fixing part (B1) on the bottom surface (400) for fixing the cover (50) and the main body (40). The pair of first parts (61) are arranged in the second direction (D2) with the fixing part (B1) sandwiched therebetween. With the fourth aspect, the pair of first parts (61) can also be used as parts of the reinforcing fixing part (B1).

Regarding the extension line (1) of the fifth aspect, it is in any one of the first aspect to the fourth aspect. The main body (40) is on the bottom surface (400), and is further equipped with a discharge part (E0). The part (E0) discharges the foreign matter that has penetrated into the internal space (SP1) to the outside of the main body (40). According to the fifth aspect, the decrease in electrical reliability can be further suppressed.

Regarding the extension line (1) of the sixth aspect, it is in any one of the first aspect to the fifth aspect. The main body (40) is in the arrangement direction (D3) and has a larger size than the cover (50) size. With the sixth aspect, the entire wiring board (A1) can be more easily folded on the side of the main body (40), and the assemblability of the extension cord (1) is improved.

Regarding the extension line (1) of the seventh aspect, it is in any one of the first aspect to the sixth aspect. The main body (40) is separated from the internal space (SP1) and is in the second direction (D2) The upper includes a pair of inner sides (401) facing each other. The extension line (1) is located on at least one of the pair of inner sides (401), and is further provided with an extension piece (63) which is integrally formed with the wall (60) and faces the opening ( 40A) Extend out. With the seventh aspect, the entire elongated body (40) will be further reinforced by the wall 60 and the extension piece (63).

Regarding the extension cord (1) of the eighth aspect, it is in any one of the first aspect to the seventh aspect, and the plug (200) includes a USB plug (the second plug P2). The patch panel (A1) contains a USB connector (C1), and the USB connector (C1) is electrically connected to the conductor (202) of the USB plug (the second plug P2), and the conductor (202) is used for direct current supply. According to the eighth aspect, the extension cord (1) that can be connected to the USB plug (the second plug P2) can suppress the reduction in electrical reliability in the case of foreign matter intrusion.

As for the configuration of the second to eighth aspects, it is not a necessary configuration of the extension cord (1) and can be omitted appropriately.

1: Extension cord 10A: Electrode 10B: Electrode 10C: Electrode 13: Kernel Department 3: chassis 40: body 40A: Opening 40B: Perimeter 40C: Outer periphery 40D: inner periphery 40E: height difference 400: bottom surface 401: inside 41: bottom wall 42: left side wall 43: right wall 50: cover 50A: Peripheral 51: Outer wall part 500: outer surface 501: back 54: Screw column 55: Positioning Department 60: Wall 600: upper end 601: recess 61: Part 1 61A: Part 1 61B: Part 1 62: Part 2 62A: Part 2 62B: Part 2 63: Extension piece 63A: Extension piece 63B: Extension piece 6X: Specific rib 80A: Guide section 80B: Guide section 91: Guide section A1: Power strip B1: Fixed part B10: Through hole D2: 2nd direction D3: Arrangement direction E0: Discharge part E1: No. 1 discharge hole G1: gap SP: Internal space 2: socket 21: Insertion port 21A: Insertion port 21B: Insertion port 21a: Insert hole 21b: Insert hole 21c: Insert hole 200: plug 201: Power cord 202: Conductor 202A: Electrode 202B: Ground terminal 37: Zone 1 38: Zone 2 44: front wall 45: rear wall 5: Power cable C1: USB connector D1: 1st direction S1: Disconnect switch P1: first plug P2: 2nd plug (USB plug) 4: Through hole 5A: Wire 5B: Wire 5C: Wire 6: ribs 6A: The first rib 6B: The second rib 12: Conductive part 16: electronic parts 17: Clamping part 18: Expose the window 70: connecting part 70A: Clamping seat 70B: Clamping seat 71: Door Piece 72: Coil spring 90: Clamping seat 120: Lead 121: Lead 134: Positioning H1: Circuit section H11: The first substrate H12: The second substrate J1: The first clamping wall L1: Protruding part M1: The first mounting wall M2: The second mounting wall Q1: Partition Q10: Placement Department 52: inner wall part 5D: Outer cover 540: screw hole 550: tube 551: contact wall 56: Temporary fixed part 57: Protruding ribs 58: 1st protruding wall 59: 2nd protruding wall 590: Concave 59A: 2nd protruding wall E2: The second discharge hole J2: The second clamping wall 15: Zoning area 15A: Division 1 area 15B: Division 2 area 15C: 3rd division area 15D: 4th division area 15E: 5th division area 15F: 6th division area 15G: District 7 401: inside 403: Barrier Wall 404: Tongue 6C: The third rib M3: Support rib SP1: Internal space 65: Wall 66: Wall 402: Barrier Wall

[Fig. 1] Fig. 1 is a cross-sectional view of the periphery of the discharge portion of the extension line of an embodiment. [Fig. 2] Fig. 2 is a perspective view of the external appearance of the above-mentioned extension cord. [Fig. 3] Fig. 3 is an exploded perspective view viewed from above the extension line. [Fig. 4] Fig. 4 is an exploded perspective view viewed from below the extension line. [Figure 5] Figure 5A is a top view of the state in which the cover is removed from the extension cord, and Figure 5B is a top view of the body in the extension cord. [Fig. 6] Fig. 6 is a perspective view of the appearance of the above-mentioned main body. [Fig. 7] Fig. 7 is a perspective view of the main parts of the main body. [Fig. 8] Fig. 8 is a cross-sectional view of a modification of the above-mentioned extension line.

1: Extension cord

10A: Electrode

10B: Electrode

10C: Electrode

13: Kernel Department

3: chassis

40: body

40A: Opening

40B: Perimeter

40C: Outer periphery

40D: inner periphery

40E: height difference

400: bottom surface

401: inside

41: bottom wall

42: left side wall

43: right wall

50: cover

50A: Peripheral

51: Outer wall part

500: outer surface

501: back

52: inner wall part

54: Screw column

55: Positioning Department

60: Wall

600: upper end

601: recess

61: Part 1

61A: Part 1

61B: Part 1

62: Part 2

62A: Part 2

62B: Part 2

63: Extension piece

63A: Extension piece

63B: Extension piece

6X: Specific rib

80A: Guide section

80B: Guide section

91: Guide section

A1: Power strip

B1: Fixed part

B10: Through hole

D2: 2nd direction

D3: Arrangement direction

E0: Discharge part

E1: No. 1 discharge hole

G1: gap

SP: Internal space

Claims (8)

An extension cord including: The main body is elongated along the first direction and has an opening and an internal space connected to the opening; The cover has an insertion opening for the conductor of the plug to be inserted, and covers the opening; and The patch panel is accommodated in the internal space and is electrically connected to the conductor inserted from the insertion port; The main body has at least one wall along a second direction crossing the first direction on the bottom surface of the internal space; The wall has: The first part is in contact with a part of the wiring board in the arrangement direction in which the bottom surface and the cover are arranged; and The height of the second part relative to the bottom surface is lower than the first part. Such as the extension line of claim 1, in which, The main body includes a pair of inner sides facing each other in the second direction across the inner space; The first part is arranged on the central side of the bottom surface in the second direction; The second part is arranged between at least one of the pair of inner side surfaces and the first part. Such as the extension line of claim 1 or 2, in which, The wall portion has a pair of the first part and a pair of the second part respectively; A pair of the second part is arranged so as to sandwich the pair of the first part in the second direction. Such as the extension line of claim 3, in which, The main body has a fixing portion on the bottom surface for fixing the cover and the main body; A pair of the first part is arranged so as to sandwich the fixing part in the second direction. Such as the extension line of claim 1 or 2, in which, The main body is further provided with a discharge portion on the bottom surface, and the discharge portion discharges foreign matter that has penetrated into the internal space to the outside of the main body. Such as the extension line of claim 1 or 2, in which, The main body, in the arrangement direction, has a size larger than that of the cover. Such as the extension line of claim 1 or 2, in which, The main body includes a pair of inner sides facing each other in the second direction across the inner space; The extension cord is attached to at least one of the pair of inner side surfaces, and is further provided with an extension piece which is integrally formed with the wall and extends toward the opening. Such as the extension line of claim 1 or 2, in which, The plug includes a USB plug; The patch panel includes a USB connector, the USB connector is electrically connected with the conductor of the USB plug, and the conductor is supplied with DC power.

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