TWI776300B - Power strip - Google Patents

Abstract

The present invention aims to suppress the reduction in electrical reliability that occurs in the event of intrusion of foreign matter. Based on this purpose, the present invention provides an extension cord (1), comprising: a main body (40), a cover (50), and a plug-in board (A1). The main body (40) has an opening (40A) and an inner space (SP1), and is elongated along the first direction. The cover (50) has an insertion port and covers the opening (40A). The body (40) has at least one wall portion (60) along the second direction (D2) intersecting with the first direction (D1) on the bottom surface (400) of the inner space (SP1). The wall portion (60) has, in the arrangement direction (D3) in which the bottom surface (400) and the cover (50) are arranged, a first portion (61) that contacts a part of the plug-in board (A1), and a first portion (61) relative to the bottom surface ( 400) is lower than the second part (62) of the first part (61).

Description

Extension cord

The present invention generally relates to extension cords; more specifically, it relates to extension cords having insertion openings into which conductors of plugs 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 hold the plurality of insertion slots individually. Therefore, the warpage of the inner body can be reduced, a gap between the outer body and the outer body can be prevented, and water can be prevented from infiltrating the inside of the casing (the outer body and the outer body). [Previously known technical literature] [Patent Literature] [Patent Document 1] Japanese Patent Laid-Open No. 2008-305715

[Problems to be Solved by Invention]

So far, in the case of the extension cord, in the case that foreign objects such as water actually penetrate into the inside of the casing, the electrical reliability may be reduced.

The present invention has been developed in view of the above-mentioned reasons, and an object thereof is to provide an extension cord capable of suppressing a decrease in electrical reliability in the event of intrusion of foreign matter. [Technical means to solve problems]

An extension cord of an aspect of the present invention includes a main body, a cover, and a power strip. The main body has an opening and an inner space connected to the opening, and has an elongated shape along the first direction. The cover has an insertion opening into which the conductor of the plug is inserted, and covers the opening. The plug board is accommodated in the inner space, and is electrically connected with the conductor inserted from the insertion port. The main body has at least one wall portion along the second direction intersecting the first direction on the bottom surface of the inner space. The wall portion has, in the arrangement direction in which the bottom surface and the cover are arranged, a first portion contacting a portion of the power strip, and a second portion with a height relative to the bottom surface lower than the first portion.

(1) Overview The figures in the following description of the embodiments are schematic diagrams; the respective ratios of the sizes and thicknesses of the constituent elements in the figures do not necessarily reflect the actual dimensional ratios.

As shown in FIG. 1 , FIG. 3 , and FIG. 4 , the extension cord 1 of the present embodiment 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 has an elongated shape along the first direction D1 (see 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 inner 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 "(inserted) plug 200" and supplies power to the inserted plug 200 via the power strip A1. Here, as shown in FIG. 2 , the extension cord 1 has a three-port socket 2 (outlet; power socket), and the three-port socket 2 can be connected to the plug 200 (first plug) of the power cord 201 drawn from the electrical appliance or the like. P1). That is to say, the extension cord 1 can be inserted into up to three 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, 21c into which the plurality of conductors 202 of the first plug P1 are inserted. Here, the plurality of conductors 202 of the first plug P1 include a pair of electrodes (blade 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 power strip A1 includes a USB connector C1 for electrically connecting the conductor 202 ( 202C) of the second plug P2, and supplies DC power to the conductor 202C. Here, as shown in FIG. 2 , the extension cord 1 includes two USB connectors C1, and at most two second plugs P2 can be inserted at the same time. However, the number of the USB connectors C1 is not limited to two. The cover 50 has two insertion ports 21 ( 21B) into which the second plug P2 is inserted. The USB connector C1 is a slot into which the second plug P2 can be inserted and connected. In short, the extension cable 1 has a USB port, which can supply DC power for charging a battery built in, for example, a portable terminal.

The power cable 5 drawn from the main body 40 can supply AC power from an external power source (eg, a commercial AC power source) by being connected to a wall socket, for example. That is to say, even if the electrical appliance is installed in a place far away from the wall socket, the electrical appliance can still receive AC power through the extension cord 1 by inserting the plug 200 into the insertion port 21 of the extension cord 1 (if it is the insertion port 21B, is DC power). The power cable 5 may have a harness plug connected to a junction box instead of a power plug connected to a socket provided in a wall or the like.

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

As shown in FIGS. 1 and 6 , the wall portion 60 has a first portion 61 that is in contact with a part of the power strip A1 and a height relative to the bottom surface 400 in the arrangement direction D3 in which the bottom surface 400 and the cover 50 are arranged. The second portion 62 is lower than the first portion 61 .

With this configuration, the foreign matter that has penetrated into the extension cord 1 is more likely to pass through the gap G1 (see FIG. 1 ) surrounded by the first portion 61 and the second portion 62 . In other words, by ensuring the passage of foreign matter, the possibility of foreign matter contacting the wiring board A1 can be reduced. Therefore, it is possible to suppress a decrease in electrical reliability in the event of intrusion of foreign matter. Hereinafter, as the foreign matter intruding into the extension cord 1, it is assumed that it is 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 residues.

(2) Details (2﹒1) Premise Hereinafter, the extension cord 1 of the present embodiment will be described in detail with reference to FIGS. 1 to 7 . Hereinafter, unless otherwise stated, the up-down, left-right, and front-rear directions of the extension line 1 are defined by using the arrows showing up-down, left-right, and front-rear directions in FIG. 2 , for description. That is, in 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 inserted into the plug 200 is the downward direction. Here, the first direction D1 corresponds to the front-rear direction, and the second direction D2 corresponds to the left-right direction. It should be noted that the arrangement direction D3 corresponds to the vertical direction. However, these directions are not intended to limit the usage directions of the extension cord 1 . In addition, the arrows which mark each direction in a figure are only marked for illustration, and do not have a substance. In the present embodiment, the extension cord 1 is assumed to be placed on a horizontal surface such as a desk and described, but it is not particularly limited.

(2﹒2) Overall composition As shown in FIG. 2 , the extension cord 1 includes a casing 3 having an elongated shape along the first direction D1 , a power strip A1 (see 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) Main body 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 thermoplastic resin such as PCABS resin. The main body 40 has a substantially rectangular parallelepiped shape extending in the front-rear direction, and has an opening 40A on the top surface and a box-like shape with a certain depth. As shown in FIG. 1 , the main body 40 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 that of the cover 50 in the arrangement direction D3 , so that the entire power strip A1 can be easily accommodated on the main body 40 side, thereby improving the assemblability of the extension cord 1 .

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 inner 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 surfaces 401 (here, corresponding to the 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 oval plate along the front-rear direction. The left side wall 42 and the right side wall 43 are erected upward from both ends of the bottom wall 41 in the short-side direction (left-right direction). 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 circular 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 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 inside of the main body 40 from the side of the opening 40A toward the side of the bottom wall 41 .

As shown in FIG. 5B , the internal space SP1 has a plurality of (for example, seven) divisional regions 15 arranged along the first direction D1 (front-rear direction). Hereinafter, the seven divisional areas 15 may be referred to as the first to seventh divisional areas 15A to 15G in order from the front side to the rear side. The isolation switch S1 (see FIG. 5A ) is arranged in the seventh divisional area 15G. The patch panel A1 is arranged in the first to sixth divisional regions 15A to 15F. In particular, in the patch panel A1, the components corresponding to the three sockets 2 (a pair of clamping bases 70A, 70B and clamping base 90, etc.) are arranged so as to correspond to the fourth to sixth divisional regions 15D on a one-to-one basis, respectively. ~15F. In the patch panel A1, the circuit section H1 is arranged so as to extend over the first to third sub-regions 15A to 15C.

The rear side wall 45 has a through hole 4 (refer to FIG. 6 ) through which the power cable 5 is inserted in the thickness direction. The through hole 4 is provided, for example, in the center of the rear side wall 45 . The outline of the opening of the through hole 4 is, for example, a circle. The entire circle of the outline of the opening of the through hole 4 is closed. Since the entire circle of the through hole 4 is closed, the strength and rigidity of the main body 40 are not easily reduced.

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

The main body 40, as shown in FIGS. 3 and 5B, further includes: a plurality of ribs 6, a first clamping wall part J1, a plurality of fixing parts B1 (screw studs), a plurality of protruding parts L1, and a plurality of first The mounting wall M1, the plurality of second mounting walls M2, the plurality of supporting ribs M3, and the partition plate Q1.

A plurality of (here, four) first placement walls M1 are connected to the third partition region 15C and protrude upward from the bottom surface 400 (see FIG. 5B ). The four first placement walls M1 are divided into two, respectively, arranged on the inner surface side of the left side wall 42 and the inner surface side of the right side wall 43 . Among the four first placement walls M1 , the two on the left side are aligned in the front-rear direction, and are integrally formed with the inner surface of the left side wall 42 . In addition, among the four first placement 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 bottom surface of the first substrate H11 of the circuit section H1 is in contact with the four first mounting walls M1, and is sandwiched by the first protruding walls 58 of the cover 50 from the top-bottom direction, which will be described later. position.

The partition Q1 protrudes upward from the bottom surface 400 . The separator Q1 has a substantially rectangular plate shape, and its thickness direction is along the first direction D1. The partition plate Q1 is arranged so as to partition the first divided region 15A and the second divided region 15B. The protruding amount of the partition plate Q1 from the bottom surface 400 is approximately equal to the protruding amount of the fixing portion B1. The partition plate Q1 has a mounting portion Q10 (refer to FIG. 6 ) that further protrudes from the center in the left-right direction at the upper end thereof.

A plurality of (here, two) second mounting walls M2 are connected to the first partition region 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 protruding amount of the second mounting wall M2 from the bottom surface 400 is approximately equal to the dimension from the bottom surface 400 to the upper end of the mounting portion Q10. That is, the protruding amount of the second mounting wall M2 from the bottom surface 400 is approximately equal to the protruding amount of the fixing portion B1. The bottom surface of the second substrate H12 in the circuit section H1 is in contact with the two second mounting walls M2 and the mounting portion Q10 , and the second substrate H12 of the circuit section H1 is placed in contact with the two second mounting walls M2 and the mounting portion Q10 . clamped and positioned.

A plurality of (here, three) support ribs M3 are connected to the fourth to sixth divisional regions 15D to 15F, and each protrudes upward from the bottom surface 400 (see FIG. 5B ). Furthermore, the three support ribs M3 are integrally formed with the inner surface of the right side wall 43 . Each support rib M3 is formed in the shape of a strip plate which is elongated in the vertical direction as a whole. Each support rib M3 is arrange|positioned so that the thickness direction may face the 1st direction D1. Each support rib M3 has a plate-like portion at its left end whose thickness direction faces the second direction D2, and the plate-like portion contacts the right side surface of the grounding conductive portion 12, which will be described later, on the guide piece portion 91 to be The guide piece 91 is positioned with respect to the left-right direction.

The plurality of ribs 6 are formed to reinforce the rigidity and strength of the main body 40 . The plurality of ribs 6 include 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 have a substantially U-shaped plate shape 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 first rib 6A extend to the vicinity of the peripheral edge portion 40B.

As shown in FIG. 5B , the five first ribs 6A are arranged so as to separate adjacent ones of the second to seventh partitions 15B to 15G, respectively. Among the five first ribs 6A, the first rib 6A located at the front is divided by two fixing portions B1. Furthermore, among the five first ribs 6A, the third and fourth first ribs 6A are separated by one fixing portion B1, respectively.

The two second ribs 6B protrude upward from the bottom surface 400 . The two second ribs 6B are aligned in the front-rear direction, and are arranged to be shifted from each other in the left-right direction. Each of the second ribs 6B is in the shape of an elongated rectangular plate when viewed along the second direction D2. 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 the two fixing portions B1. Among the two second ribs 6B, the rear second rib 6B extends from the rearmost first rib 6A among the five first ribs 6A to the first holding wall portion J1.

A pair of 3rd rib 6C is arrange|positioned in the area|region equivalent to 15G of 7th division|regions among a pair of inner surface 401 (inner surface of the left side wall 42 and the right side wall 43). The pair of third ribs 6C are tied to face each other in the second direction D2. The pair of third ribs 6C respectively protrude from the pair of inner side surfaces 401 in a direction (inside) in which they approach each other. The pair of third ribs 6C are in the shape of a long plate extending along the arrangement direction D3 when viewed along the first direction D1, and extend from the vicinity of the bottom surface 400 to the vicinity of the peripheral portion 40B.

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

The first holding wall portion J1 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 ) in a region of the bottom surface 400 corresponding to the seventh partition region 15G. The first holding 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 holding wall portion J1 is for pulling the power cable 5 from the outside of the main body 40 into the inside of the main body 40 through the through hole 4 of the main body 40 . Clamped member. In the present embodiment, the first holding wall portion J1 and the second holding wall portion J2 constitute the holding portion 17 for holding 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 restrain the tension at this time. As a result, even if the power supply cable 5 is pulled, the disconnection of the connection between the plug board A1 in the casing 3 and the power supply cable 5 can be suppressed.

A plurality of (here, six) fixing portions B1 (screw studs) are fastened to screw studs 54 of the cover 50, which will be described later, to fix the 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 provided so as to be dispersed over the entire bottom wall 41 .

For example, among the six fixing parts B1, the two fixing parts B1 located on the front side are arranged in a row along the second direction D2 as shown in FIG. 5B so that the second division area 15B and the third division are separated. The first rib 6A of the region 15C is divided. In addition, among the six fixing parts B1, the two fixing parts B1 located substantially in the center are arranged such that the first rib 6A which partitions the fourth partition region 15D and the fifth partition region 15E, and the The first rib 6A of the fifth divisional area 15E and the sixth divisional area 15F is divided. In addition, among the six fixing parts B1, the two fixing parts B1 located on the rear side are arranged in the seventh division area 15G, and are formed integrally with the left and right ends of the first holding wall part J1, respectively.

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

A plurality of (eg, nine) protruding portions L1 contact the bottom surface of the inner core portion 13 in the plug board A1 when the cover 50 closes the opening portion 40A of the main body 40 . The protruding portion L1 is a portion for positioning the inner core portion 13 of the power strip A1 in the vertical direction of the main body 40 together with the positioning portion 55 of the cover 50 , which will be described later. Each of the protrusions L1 protrudes from the bottom surface 400 in a substantially cylindrical shape. The nine protrusions L1 are divided into each of the fourth to sixth divisional regions 15D to 15F, and three are arranged each.

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

As shown in FIG. 7, the 1st discharge hole E1 is formed in the base part (root part) of the fixing|fixed part B1 located in the boundary of the 4th division area 15D and the 5th division area 15E. The first discharge hole E1 is formed at the base portion of the fixing portion B1 located in the fourth partition region 15D, and has its opening. The first discharge hole E1 connects the internal space SP1 to the outside of the main body 40 . As shown in FIG. 5B , the first discharge hole E1 is arranged at the approximate center of the main body 40 in the first direction D1.

In the vicinity of 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 matter other than liquid is directed toward the first discharge hole E1, there is a high possibility that it will be intercepted by the barrier wall 402, and the occurrence of a situation in which the first discharge hole E1 is blocked by foreign matter other than liquid can be suppressed.

As shown in FIG. 5B , the second discharge hole E2 is arranged in the center of the first partition region 15A of the bottom surface 400 . The second discharge hole E2 connects the inner space SP1 to 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 like a cannonball. The second discharge hole E2 is formed in the 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 matter other than liquid is directed toward the second discharge hole E2, there is a high possibility that it will be intercepted by the barrier wall 403 and the tongue portion 404, and the occurrence of the blockage of the second discharge hole E2 by foreign matter other than liquid can be suppressed. .

(2﹒4) Cover The cover 50 is formed of thermoplastic resin such as polycarbonate resin, for example. 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 the first area 37 and the 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 of the second area 38 . The length dimension of the first region 37 in the front-rear direction is approximately four times the length of the second region 38 in the front-rear direction. Both the first region 37 and the second region 38 are substantially flat planes. However, there is a height difference between the first area 37 and the second area 38 , and the first area 37 is slightly higher than the second area 38 with respect to the main body 40 .

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

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

The three insertion openings 21A and the two insertion openings 21B are arranged in the first region 37 of the outer surface 500 of the cover 50 . Specifically, the two insertion openings 21B are located near the front end of the first region 37 and are arranged along the first direction D1, and the three insertion openings 21A are located at a distance slightly backward from the two insertion openings 21B, They are 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 . The components corresponding to the three sockets 2 (a pair of clamping bases 70A, 70B, clamping base 90, etc.) are respectively accommodated in the fourth to sixth divisional regions 15D to 15F of the internal space SP1, and are arranged so as to The insertion ports 21A face each other.

The two insertion ports 21B are fastened through the cover 50 in the thickness direction. 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 partition area 15A of the internal space SP1, and are arranged so as to face the two insertion ports 21B, respectively.

The exposure window 18 is, for example, a rectangle, and is disposed in a predetermined area (eg, the left half area) within the second area 38 of the outer surface 500 of the cover 50 . The exposure window 18 faces the seventh divisional area 15G of the interior space SP1. The partition 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 side wall portion 51, an inner side wall portion 52, a second clamping wall portion J2, a plurality of (here, six) screw studs 54, a plurality of ( Here are nine) positioning parts 55 and a plurality of temporary fixing parts 56 . Furthermore, the cover 50 further includes, on the back surface 501, a plurality of protruding ribs 57, a plurality of (here, four) first protruding walls 58, and a plurality of (here, four) second protrusions. wall 59. The second holding wall portion J2 is a member for holding the power cable 5 between it and the first holding wall portion J1 of the main body 40 .

Here, the power supply cable 5 has a plurality of (for example, three) electric wires 5A, 5B, and 5C, and an outer cover 5D (see FIGS. 3 and 4 ). Each of the three wires 5A, 5B, and 5C is an insulated wire. The outer covering body 5D is a member that bundles and covers the three electric wires 5A, 5B, and 5C. The electric wire 5A is electrically connected to the electrode portion 10A, the electric wire 5B is electrically connected to the electrode portion 10B, and the electric wire 5C is electrically connected to the conductive portion 12 for grounding.

The six screw posts 54 protrude downward from the back surface 501 of the cover 50 . The six studs 54 are arranged so as to face each of the six fixing portions B1 (screws) one-to-one. Each screw stud 54 has a bottomed screw hole 540 recessed upward along the central axis from the lower end surface thereof. 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 into the screw holes 540 of the opposite screw posts 54 .

The outer side wall portion 51 and the inner side wall portion 52 are portions that reinforce the rigidity and strength of the cover 50 . The outer side wall portion 51 and the inner side 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 provided so as to extend over the entire circumference of the periphery of the back surface 501 of the cover 50 (that is, the entirety in the circumferential direction). The inner side wall portion 52 is attached to the inner side of the outer side wall portion 51 , and is provided along the circumferential direction of the cover 50 with a gap therebetween. By forming the outer side wall portion 51 and the inner side wall portion 52 to extend over the entire circumferential direction of the cover 50 in this manner, the strength and rigidity of the cover 50 are enhanced.

As shown in FIG. 1 , the protruding amount of the inner side wall portion 52 with respect to the rear surface 501 of the cover 50 is larger than the protrusion amount of the outer side wall portion 51 with respect to the rear surface 501 of the cover 50 . Accordingly, the outer side wall portion 51 and the inner side wall portion 52 are less likely to interfere with the inner peripheral surface of the main body 40 .

The nine positioning portions 55 are portions for positioning the inner core portion 13 at the position of the rear surface 501 of the cover 50 . The inner core portion 13 is a member that holds the clamping bases 70A, 70B, and 90 to be described later.

The nine positioning portions 55 are arranged in the fourth to sixth divisional regions 15D to 15F of the interior space SP1. As shown in FIG. 4 , each positioning portion 55 has a cylindrical portion 550 protruding substantially cylindrically from the rear 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 portion 40A of the main body 40 is closed by the cover 50, so that the cylindrical portion 550 is inserted into the positioning hole 134 formed in the inner core portion 13 of the plug board A1, and is made to contact the wall 551. The peripheral edge portion of the positioning hole 134 of the inner core portion 13 is contacted. The nine positioning portions 55 and the nine protruding portions L1 of the main body 40 sandwich the three inner core portions 13 located on the patch panel A1 in the up-down direction, so that each inner core portion 13 can be stably positioned.

The plurality of temporary fixing portions 56 are portions 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 partition 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 can be easily pulled by being temporarily fixed to the plurality of temporary fixing portions 56; furthermore, when the power cable 5 is pulled, it is possible to prevent the wire from being disconnected due to the current tension.

The plurality of protruding ribs 57 are arranged in the fourth to sixth divisional regions 15D to 15F of the internal space SP1. The plurality of protruding ribs 57 are portions that contact the three inner core portions 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 . Each of the inner core portions 13 can be stably positioned by sandwiching the three inner core portions 13 in the vertical direction together with the nine positioning portions 55 and the nine projection portions L1 of the main body 40 by the plurality of protruding ribs 57 .

The four first protruding walls 58 are arranged at four corners on the left, right, front and rear of the third partition region 15C of the interior space SP1. The four first protruding walls 58 are portions that contact the four corners of the circuit section H1 at the front, rear, left and right corners of the first substrate H11 of the circuit section H1 from the upper side. Each of the first protruding walls 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 integrally formed with the inner side wall portion 52 . The first substrate H11 can be stably positioned by sandwiching the first substrate H11 in the vertical direction together with the four first mounting walls M1 of the main body 40 by the four first protruding walls 58 .

The four second protruding walls 59 are arranged in the first divisional region 15A of the interior space SP1. The four second protruding walls 59 are portions that contact the front end portion, the left and right end portions, and the rear end portion of the second substrate H12 in the circuit section H1 from the upper side. Each of the second protruding walls 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. The leads 121 electrically connect the first substrate H11 and the second substrate H12. The second substrate H12 can be stably positioned by sandwiching the second substrate H12 in the vertical direction together with the two second mounting walls M2 and the mounting portion Q10 of the main body 40 by the four second protruding walls 59 .

(2﹒5) Power strip As shown in FIG. 3 , FIG. 4 , and FIG. 5A , the patch panel A1 includes an electrode portion 10A, an electrode portion 10B, a grounding conductive portion 12 , three core portions 13 , and a circuit section H1 . The patch panel A1 is accommodated in the inner space SP1 and is electrically connected to the conductor 202 inserted through the insertion port 21 .

The electrode parts 10A and 10B are each electrically connected to one 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 (eg, a metal; more specifically, a copper alloy, for example).

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

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

The three connection parts 70 correspond to the three sockets 2 one-to-one. The clamping seat 70A and the clamping seat 70B of each connecting portion 70 are arranged in the casing 3 so as to face the insertion holes 21 a and 21 b of the corresponding socket 2 respectively. One pair of electrodes 202A of the first plug P1 inserted into the socket 2 is electrically connected to one of the three connection portions 70 . The holding bases 70A and 70B of the respective connection portions 70 correspond to the pair of electrodes 202A of the first plug P1 on a one-to-one basis. The three connecting portions 70 are arranged one each 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 (blade in the illustrated example) in the first plug P1, so as to achieve electrical and mechanical contact with the electrode 202A. connect. Each of the clamping base 70A and the clamping base 70B has a plurality of (for example, three) protruding pieces, 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 size as each other. In other words, these systems are formed as parts common to each other.

The guide pieces 80A and 80B are arranged to substantially extend over the fourth to seventh divisional regions 15D to 15G so that the thickness direction thereof faces the arrangement direction D3 and the longitudinal direction thereof is along the first direction D1. The guide pieces 80A and 80B are arranged to be spaced apart from each other by a predetermined interval in the left-right direction, and to be shifted from each other in the longitudinal direction (the guide piece 80B is slightly shifted to the rear). The guide pieces 80A and 80B are attached to the lower sides of the three inner core parts 13 and are placed on one pair of first parts 61 which will be described later. The electric wire 5A is electrically connected to the rear end portion of the guide piece portion 80A, and the electric wire 5B is electrically connected to the rear end portion of the guide piece portion 80B. The pair of guide pieces 80A and 80B are formed to have the same shape and size as each other. That is, a pair of guide piece part 80A, 80B is formed as a mutually common component. On the way of the electric wire 5B, the disconnector 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 (eg, metal; more specifically, brass, for example). The conductive portion 12 has three holding seats 90 and a guide piece 91 . The three holding seats 90 are integrally formed with the guide piece 91 . The conductive portion 12 is formed by, for example, bending a metal plate.

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

The guide portion 91 is a strip-shaped plate. The guide piece 91 is arranged so as to substantially extend over the fourth to seventh divisional regions 15D to 15G so that the thickness direction thereof faces the second direction D2 and the longitudinal direction thereof is along the first direction D1. The guide portion 91 is arranged along the right side surfaces of the three inner core portions 13 . The electric wire 5C is electrically connected to the rear end portion of the lead portion 91 . Since the guide part 91 is integrally formed with the three clamping bases 90 as described above, the guide part 91 is supported by the three inner core parts 13 via the three clamping bases 90 . In particular, the guide portion 91 is in contact with the three support ribs M3 on the right side as described above, and is stably positioned in the casing 3 by the three inner core portions 13 and the three support ribs M3.

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

As shown in FIG. 3 , in each connection portion 70, a resin door piece 71 is arranged on the back side of the cover 50, and covers the insertion holes 21a and 21b. The door piece 71 is accommodated in a state of being urged by the coil spring 72 . When the pair of electrodes 202A of the first plug P1 is pushed against the door piece 71, the door piece 71 is slid leftward against the pressing force of the coil spring 72, and the first plug P1 is connected. In short, when the socket 2 is not used, the insertion holes 21a and 21b are covered with the door piece 71 .

As shown in FIG. 3 , FIG. 4 , and FIG. 5A , the circuit section H1 includes 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 1st board|substrate H11 is a printed wiring board, and the some electronic component 16 which comprises a conversion circuit is embedded. The first substrate H11 is arranged in the third partition region 15C. The conversion circuit generates a high-frequency AC voltage using, for example, AC power (for example, 100V) received from the electrodes 10A and 10B, and then generates a rectified and smoothed DC voltage through a diode, an electrolytic capacitor, or the like. . Then, the conversion circuit will output a stabilized DC voltage (eg, 5V) by switching and adjusting the generated DC voltage. In short, the conversion circuit is configured to convert the AC power from the side of the electrode parts 10A and 10B into DC power. A pair of AC input terminals of the conversion circuit, as shown in FIG. 3 , are electrically connected to the electrode portions 10A, 10B through lead wires 120 , 120 , respectively. The conversion circuit supplies a stabilized DC voltage of 5V to the second substrate H12 side through the DC output terminal.

As shown in FIG. 3 and FIG. 5A , the second board H12 is a printed wiring board on which two USB connectors C1 are mounted on the top surface (embedding surface). The second substrate H12 is arranged in the first divisional region 15A. Each USB connector C1 is a connector (slot) to which a second plug P2 (eg, a USB Type-A plug) can be connected. The conductor 202C of the second plug P2 is electrically connected to the USB connector C1 to supply DC power to the conductor 202C. However, the type of the USB connector is not particularly limited. In the present embodiment, the pair of USB connectors C1 are aligned on the second board H12 in the same orientation. That is to say, the plastic substrates on which the four terminals (VBUS, -DATA, +DATA, and GND) of a pair of USB connectors C1 have been formed will be oriented in the same direction so that they are all in the left and right directions. The power supply terminal (VBUS) and the ground terminal (GND) of each USB connector C1 are each connected to a wiring conductor (eg, copper foil) formed on the second substrate H12 by soldering. Each of the USB connectors C1 is electrically connected to the DC output terminal of the first substrate H11 via the wiring conductors of the second substrate H12 and the plurality of lead wires 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 such as about 5V.

(2﹒6) Disconnect switch The disconnecting switch S1 is inserted into the contact on the way of being electrically connected to the electric wire 5B of the electrode portion 10B; by switching the contact between the closed state and the open state, the electric wire 5B is connected or disconnected. The disconnect switch S1 may be connected to or disconnected from the electric wire 5A by inserting a contact point in the middle of being electrically connected to the electric wire 5A of the electrode portion 10A. The disconnection switch S1 can manually switch the state of the contact through the operation part exposed by the exposure window 18 . Furthermore, as long as a current of a predetermined current value or more (that is, an overcurrent) flows in the wire 5B, the disconnect switch S1 automatically switches the contact from the closed state to the open state, and cuts off the energized state of each wire 5B ( overcurrent prevention function).

(2﹒7) The passage of foreign matter At this point, the extension cord 1 may have foreign matter (here, liquid) intruding into the casing 3 through, for example, the plurality of insertion ports 21 ( 21A, 21B) of the cover 50 .

For example, when a foreign object intrudes into the casing 3 from the two insertion openings 21B facing the two USB connectors C1, the foreign object falls on the top surface of the second substrate H12 located in the first partition area 15A . Even if the liquid is spilled on the second substrate H12 (weak side substrate), it is only to the extent that the USB connector C1 has a poor contact, and various electronic components are not easily damaged, or insulation is lowered, which reduces reliability.

The foreign matter passes through the top surface of the second substrate H12 and falls to a lower position than the second substrate H12. Here, since the second discharge hole E2 of the discharge portion E0 is provided below the second substrate H12, foreign matter that has penetrated into the first partitioned region 15A can be discharged from the second discharge hole E2.

In particular, at the boundary between the first partitioned region 15A and the second partitioned region 15B, there is provided a relatively high partition Q1 extending to the bottom surface of the second substrate H12. As a result, the foreign matter in the first compartmentalized region 15A is prevented from diffusing to the second compartmentalized region 15B side, that is, the first substrate H11 (high-current-side substrate) side.

Furthermore, even if foreign matter penetrates into the second to seventh divisional regions 15B to 15G, since the plurality of ribs 6 are provided between the adjacent divisional regions 15, the diffusion of the foreign matter can be suppressed.

Here, among the five first ribs 6A, attention will be paid to the boundary between the fourth divisional area 15D and the fifth divisional area 15E, and the boundary between the fifth divisional area 15E and the sixth divisional area 15F. The two first ribs 6A (hereinafter, referred to as "specific ribs 6X" (see FIG. 6 )). Since the two specific ribs 6X have substantially the same shape and 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 portion 60 and a pair of extending pieces 63 arranged in the second direction D2 (left-right direction). In other words, the main body 40 has the wall portion 60 along the second direction D2 on the bottom surface 400 of the inner space SP1.

The wall portion 60 is arranged in the second direction D2 so as to sandwich the fixing portion B1 (screw stud). The wall portion 60 is integrally formed with the fixing portion B1.

Here, the wall portion 60 has a pair of first sites 61 and a pair of second sites 62, respectively. The pair of second parts 62 are arranged in the second direction D2 so as to sandwich the pair of first parts 61 therebetween. Here, as an example, the first portion 61 ( 61A) and the second portion 62 ( 62A) located on the left side of the fixing portion B1 are integrally formed with each other, and these front surfaces are formed into a flat surface, and similarly The rear surfaces become one plane with each other. Furthermore, the first part 61 (61B) and the second part 62 (62B), which are located on the right side of the fixing part B1, are integrally formed with each other, and the front surfaces become one plane with each other, and similarly the rear surfaces become a plane with each other.

Each of the first portions 61 is in the shape of a rectangular plate whose thickness direction is directed in the front-rear direction. The pair of first portions 61 are arranged in the second direction D2 so as to sandwich the fixing portion B1 therebetween. A pair of 1st parts 61A, 61B are comprised so that it may contact a part of the wiring board A1 in the arrangement direction D3 (vertical direction). Here, as an example, the so-called "part of the wiring board A1" corresponds to the lead portion 80A of the electrode portion 10A and the lead portion 80B of the electrode portion 10B. Specifically, the guide piece portion 80A is placed on the upper end portion of the first site 61A, and the guide piece portion 80B is placed on the upper end portion of the first site 61B. In short, the guide pieces 80A and 80B are stably positioned by restricting their downward movement by the pair of first parts 61 . Each of the first parts 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 integrally formed with the fixing portion B1.

The second portion 62A is arranged between the left inner side surface 401 and the first portion 61A, and the second portion 62B is arranged between the right inner side surface 401 and the first portion 61B. In other words, each second site 62 is arranged between one of the pair of inner surfaces 401 and the first site 61 . Each of the second portions 62 is in the shape of a rectangular plate whose thickness direction is directed in the front-rear direction. The upper end of each second portion 62 is curved so as to be directed upward as it is farther away from the first portion 61 . 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 portion 62A is formed continuously to protrude leftward from the lower left edge of the first portion 61A. The first portion 61A and the second portion 62A have an inverted L-shape as a whole when viewed from the front. The second portion 62B is formed to protrude rightward from the lower right edge of the first portion 61B, and the first portion 61B and the second portion 62B are L-shaped as a whole when viewed from the front.

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

Each of the extending pieces 63 is in the shape of a rectangular plate whose thickness direction is directed in the front-rear direction. Each extension piece 63 is formed integrally with the wall portion 60 on one (corresponding to) one 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 portion 62A; the right extension piece 63B of the pair of extension pieces 63 is formed continuously with the second portion 62B. The upper end portion of each extension piece 63 corresponds to the upper end portion 600 of the first rib 6A described above.

In the present embodiment, when a foreign object with a height exceeding the second portion 62 intrudes into the extension cord 1, each first portion 61 and the second portion 62 of its partition wall pass through the gap G1 (refer to 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 portion 61 and the second portion 62, the foreign matter can be reduced by securing a passage (gap G1) for foreign matter on the lower side than the power strip A1. Possibility to contact patch panel A1. Therefore, it is possible to suppress a decrease in electrical reliability in the event of intrusion of foreign matter.

Here, the wall portion 60 is a part of the rib 6 formed to reinforce the rigidity and strength of the main body 40 . That is, the wall portion 60 has a structure for securing the gap G1 , a structure for reinforcing the main body 40 , and a structure for positioning a part of the plug board A1 (the guide pieces 80A, 80B).

Furthermore, since the pair of first portions 61 are arranged so as to sandwich the fixing portion B1 in the second direction D2, they can also serve as portions 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 1st part 61 is arrange|positioned at the center side in the 2nd direction D2, and the 2nd part 62 is arrange|positioned between the inner surface 401 and the 1st part 61. As shown in FIG. As a result, the contact position between the first portion 61 and the electrode portion ( 10A or 10B ) can be set on the center side, and the passage through which the foreign matter intruding can pass can be set on the inner side surface 401 side, so that the electric current can be further suppressed. Decreased reliability.

Moreover, since the 1st discharge hole E1 of the discharge part E0 is provided in the 4th division area 15D, the foreign matter which penetrated into the 4th division area 15D can be discharged from the 1st discharge hole E1. As a result, the decrease in electrical reliability can be further suppressed.

Among the five first ribs 6A, the rearmost first rib 6A has a wall portion 65 (see FIG. 6 ) whose height from the bottom surface 400 is approximately equal to the height of the first portion 61 . On the upper end of the wall portion 65, the rear end portion of the guide piece portion 80B is placed. In addition, among the five first ribs 6A, the two first ribs 6A which are located more forward than the two specific ribs 6X have a wall portion 66 (see FIG. 6 ); the wall portion 66 is counted from the bottom surface 400 . The height is substantially equal to the height of the second portion 62 . That is, the height of the wall portion 66 is lower than the wall portion 65 .

By configuring the five first ribs 6A in this manner, a structure is formed in which the foreign matter intruding into the second to sixth divisional regions 15B to 15F does not exceed the second portion 62 or the wall portion 66 in amount. , it is not easy to move to the partition area 15 next door. However, the foreign matter that has entered the fourth divisional region 15D beyond the second portion 62 or the wall portion 66 is discharged from the first discharge hole E1. In addition, the structure is such that the foreign matter that has penetrated into the sixth divisional area 15F is not easily moved to the seventh divisional area 15G side unless the amount of intrusion exceeds the wall portion 65 in a short time.

(3) Modifications The above-described embodiment is only one of various embodiments of the present invention. As long as the object of the present invention can be achieved, the above-described embodiment can be variously modified according to design and the like. Variations of the above-described embodiment will be listed below. The modified examples described below can be appropriately combined and applied. Hereinafter, the above-described 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 two or more may be used.

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

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

In the basic example, the main body 40 is cup-shaped in cross section; the main body 40 has a size larger than that of the cover 50 in the arrangement direction D3 . However, the body 40 can also be tied 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 can also be in the shape of an open flat rectangular box with the sides facing each other.

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

(4) Summary As described above, the extension cord (1) of the first aspect includes: a main body (40), a cover (50), and a power strip (A1). The body (40) has an opening (40A) and an inner space (SP1) connected to the opening (40A), and is elongated along the first direction (D1). 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 inner space (SP1), and is electrically connected to the conductor (202) inserted from the insertion port (21). The body (40) has at least one wall portion (60) along the second direction (D2) intersecting with the first direction (D1) on the bottom surface (400) of the inner space (SP1). The wall portion (60) has, in the arrangement direction (D3) in which the bottom surface (400) and the cover (50) are arranged, a first portion (61) that contacts a part of the plug-in board (A1), and a first portion (61) relative to the bottom surface ( 400) is lower than the second part (62) of the first part (61). According to the first aspect, it is possible to suppress a decrease in electrical reliability in the case of intrusion of foreign matter.

Regarding the extension line (1) of the second aspect, in the first aspect, its body (40) includes a pair of inner side surfaces ( 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). According to the second aspect, since the contact position between the first part (61) and a part of the wiring board (A1) can be set at the center side of the bottom surface (400), the path through which the intruding foreign matter passes can be set On the inner side ( 401 ) side, the decrease in electrical reliability can be further suppressed.

Regarding the extension line (1) of the third aspect, in the first aspect or the second aspect, 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 so as to sandwich the pair of first parts ( 61 ) in the second direction ( D2 ). According to the third aspect, the plug board (A1) will be more stably positioned on the main body (40).

Regarding the extension cord (1) of the fourth aspect, as in the third aspect, 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 pair of 1st parts (61) are arrange|positioned so that the fixing|fixed part (B1) may be interposed in the 2nd direction (D2). According to the fourth aspect, the pair of first parts ( 61 ) can also be used as parts for reinforcing the 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 attached to the bottom surface (400), and a discharge part (E0) is further provided. The part (E0) discharges the foreign matter intruding into the inner 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, in any aspect from the first aspect to the fifth aspect, the main body (40) is connected in the arrangement direction (D3), and has a larger diameter than the cover (50). size. According to the sixth aspect, the entirety of the power strip (A1) can be more easily folded on the side of the main body (40), thereby improving the assemblability of the extension cord (1).

Regarding the extension line (1) of the seventh aspect, in any aspect from the first aspect to the sixth aspect, the main body (40) is separated from the inner space (SP1) and is in the second direction (D2) The upper surface includes a pair of inner side surfaces (401) facing each other. The extension line (1) is connected to at least one of the pair of inner side surfaces (401), and further includes an extension piece (63), the extension piece (63) is integrally formed with the wall portion (60) and faces the opening (63). 40A) extends out. According to the seventh aspect, the entire elongated body (40) is further reinforced by the wall portion 60 and the extension piece (63).

Regarding the extension cord ( 1 ) of the eighth aspect, in any one of the first aspect to the seventh aspect, the plug ( 200 ) includes a USB plug (the second plug P2 ). The power strip (A1) includes a USB connector (C1), and the USB connector (C1) is electrically connected to the conductor (202) of the USB plug (second plug P2), and conducts DC power to the conductor (202). supply. According to the eighth aspect, the extension cord ( 1 ) to which the USB plug (the second plug P2 ) can be connected can suppress the decrease in electrical reliability in the event of intrusion of foreign objects.

As for the constitutions of the second to eighth aspects, they are not necessary constitutions of the extension line (1), and can be appropriately omitted.

1: extension cord 10A: Electrode part 10B: Electrode part 10C: Electrode part 13: inner core 3: Chassis 40: Ontology 40A: Opening 40B: Peripheral part 40C: Outer peripheral edge 40D: Inner peripheral part 40E: Height difference 400: Bottom 401: inner side 41: Bottom wall 42: Left side wall 43: Right side wall 50: cover 50A: Peripheral 51: Outer side wall 500: outer surface 501: Back 54: Screw column 55: Positioning part 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 ribs 80A: Guide part 80B: Guide part 91: Guide part A1: Power strip B1: Fixed part B10: Through hole D2: 2nd direction D3: Arrangement direction E0: discharge part E1: 1st discharge hole G1: Gap SP: interior space 2: socket 21: Insertion port 21A: Insertion port 21B: Insertion port 21a: Insertion hole 21b: Insertion hole 21c: Insertion hole 200: Plug 201: Power Cord 202: Conductor 202A: Electrodes 202B: Ground terminal 37: Zone 1 38: Zone 2 44: Front Sidewall 45: Rear side wall 5: Power cable C1: USB connector D1: 1st direction S1: Disconnect switch P1: 1st plug P2: 2nd plug (USB plug) 4: Through hole 5A: Wire 5B: Wire 5C: Wire 6: Ribs 6A: 1st rib 6B: 2nd rib 12: Conductive part 16: Electronic Parts 17: Clamping part 18: Expose the window 70: Connection part 70A: Clamping seat 70B: Clamping seat 71: Door Piece 72: Coil Spring 90: Clamping seat 120: Lead 121: Lead 134: Positioning H1: circuit interval H11: 1st substrate H12: 2nd substrate J1: 1st clamping wall L1: Protrusion M1: 1st mounting wall M2: Second mounting wall Q1: Baffle Q10: Loading part 52: Inner side wall 5D: outer coat 540: screw holes 550: barrel 551: Contact Wall 56: Temporary Fixing Department 57: Raised Ribs 58: 1st protruding wall 59: 2nd protruding wall 590: Recess 59A: 2nd protruding wall E2: 2nd discharge hole J2: 2nd clamping wall 15: Zoning area 15A: Division 1 Area 15B: Division 2 Area 15C: Division 3 Area 15D: 4th Division Area 15E: 5th Division Area 15F: 6th Division Area 15G: 7th Division Area 401: inner side 403: Barrier Wall 404: Tongue 6C: 3rd rib M3: Support Ribs SP1: Interior Space 65: Wall 66: Wall 402: Barrier Wall

[FIG. 1] FIG. 1 is a cross-sectional view taken along the periphery of the discharge portion of the extension line of one embodiment. [Fig. 2] Fig. 2 is an external perspective view of the 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. [FIG. 5] FIG. 5A is a top view of the state in which the cover is removed from the extension cord, and FIG. 5B is a top view of the main body in the extension cord. [FIG. 6] FIG. 6 is an external perspective view of the main body. [Fig. 7] Fig. 7 is a perspective view of the main part 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 part

10B: Electrode part

10C: Electrode part

13: inner core

3: Chassis

40: Ontology

40A: Opening

40B: Peripheral part

40C: Outer peripheral edge

40D: Inner peripheral part

40E: Height difference

400: Bottom

401: inner side

41: Bottom wall

42: Left side wall

43: Right side wall

50: cover

50A: Peripheral

51: Outer side wall

500: outer surface

501: Back

52: Inner side wall

54: Screw column

55: Positioning part

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 ribs

80A: Guide part

80B: Guide part

91: Guide part

A1: Power strip

B1: Fixed part

B10: Through hole

D2: 2nd direction

D3: Arrangement direction

E0: discharge part

E1: 1st discharge hole

G1: Gap

SP: interior space

Claims (10)

An extension cord, comprising: a main body, which is elongated along a first direction, and has an opening and an inner space connected to the opening; a cover, which has an insertion opening into which a conductor of a plug is inserted, and covers the opening and a plug board, accommodated in the inner space, and electrically connected with the conductor inserted from the insertion port; the body, on the bottom surface of the inner space, has a second direction that intersects with the first direction At least one wall part of the lower than the first part; the top of the first part in the arrangement direction is in contact with a part of the power strip along the second direction; and the second part and the power strip are formed between There are gaps. The extension of claim 1, wherein the main body includes a pair of inner side surfaces facing each other in the second direction across the inner space; the first portion is disposed between the bottom surfaces in the second direction The center side; the second portion is disposed between at least one of the pair of inner side surfaces and the first portion. An extension of claim 1 or 2, wherein, The wall portion has a pair of the first portion and a pair of the second portion, respectively, and the pair of the second portion is arranged so as to sandwich the pair of the first portion in the second direction. The extension of claim 3, wherein the main body has a fixing portion on the bottom surface for fixing the cover and the main body; a pair of the first parts are arranged in the second direction to fix the The part is sandwiched in the middle. The extension line of claim 1 or 2, wherein the main body is further provided with a discharge portion on the bottom surface, and the discharge portion discharges the foreign matter intruding into the inner space to the outside of the main body. The extension of claim 1 or 2, wherein the body, in the arrangement direction, has a size larger than the cover. The extension line of claim 1 or 2, wherein the body includes a pair of inner side surfaces facing each other in the second direction across the inner space; the extension line is tied to at least one of the pair of inner side surfaces On the one hand, an extension piece is further provided, and the extension piece is integrally formed with the wall portion and extends toward the opening portion. The extension cord of claim 1 or 2, wherein the plug includes a USB plug; The plug board 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. An extension cord, comprising: a main body, which is elongated along a first direction, and has an opening and an inner space connected to the opening; a cover, which has an insertion opening into which a conductor of a plug is inserted, and covers the opening and a plug board, accommodated in the inner space, and electrically connected with the conductor inserted from the insertion port; the body, on the bottom surface of the inner space, has a second direction that intersects with the first direction At least one wall part of the lower than the first part; and the wall part respectively has a pair of the first part and a pair of the second part; a pair of the second part is arranged so that the pair of the first part 1 part is sandwiched in the middle; the main body has a fixing part on the bottom surface for fixing the cover and the main body; a pair of the first parts are arranged so as to sandwich the fixing part in the second direction . An extension cord, comprising: a main body, which is elongated along a first direction, and has an opening and an inner space connected to the opening; a cover, which has an insertion opening into which a conductor of a plug is inserted, and covers the opening part; and a power strip, accommodated in the inner space, and electrically connected with the conductor inserted from the insertion port; The main body, on the bottom surface of the inner space, has at least one wall part along a second direction intersecting with the first direction; the wall part has: a first part, the bottom surface and the cover are arranged in an array In the direction, it is in contact with a part of the power strip; and the second part is lower than the height of the first part relative to the bottom surface; and the main body is tied to the bottom surface and is further provided with a discharge part, and the discharge part will penetrate into the interior Foreign matter in the space is discharged to the outside of the body.

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