WO2008026266A1

WO2008026266A1 - Tracking prevention plug socket

Info

Publication number: WO2008026266A1
Application number: PCT/JP2006/317136
Authority: WO
Inventors: Ikuo Iwasaki
Original assignee: Ikuo Iwasaki
Priority date: 2006-08-30
Filing date: 2006-08-30
Publication date: 2008-03-06

Abstract

To provide a plug socket capable of surely preventing tracking from occurrence even when a gap between the socket front surface and a plug surface is large. The plug socket (1a) comprises a receptacle body (2a) including a pair of through holes (4a) which is formed in the front surface (3) of the socket and into which the terminal blades of a power plug are inserted, and a recess (5a) so formed as to surround the through holes (4a); a movable body (6a) which is received in the recess (5a) and on the front surface of which conductors (10a, 10b) are provided; and an elastic member (12) mounted onto the rear surface (9b) of the movable body.

Description

Specification

Tracking prevention outlet

Technical field

TECHNICAL FIELD [0001] The present invention relates to a general household power supply or an industrial power outlet, and more particularly to an outlet capable of preventing tracking caused by dust accumulated between terminal blades of a plug.

Background art

[0002] If the terminal blade of the plug is left inserted in a wall-buried outlet for a long period of time, dust accumulates between the plug and the outlet. Since dust has conductivity when it absorbs moisture in the air, if left in a state where dust is accumulated, a minute current flows through the dust, and a carbonized conductive path is formed on the plug surface to connect between the terminal blades. (Hereafter referred to as tracking). As tracking progresses, the plug may overheat and break down, or a fire may result from fire. For example, the technology shown in Fig. 7 is known as a technique for preventing such tracking!

FIG. 7 (a) is a perspective view of a tracking preventing outlet according to the prior art, and FIGS. 7 (b) and (c) are a side view and a plan view showing a state in which a power plug is inserted into the outlet body, respectively. . FIGS. 8 (a) and 8 (b) are a side view and a plan view, respectively, showing a state where the power plug is incompletely inserted into the tracking prevention outlet of FIG.

As shown in Fig. 7 (a) to (c), the outlet 51 is a type that is embedded in the wall surface. The outlet 51 is connected to the plug surface 55 on which the terminal blade 54 of the power plug 53 projects. A pair of through-holes 56 and 56 into which the terminal blade 54 of the power plug 53 is inserted are formed, and conductors 57 are formed at positions surrounding the terminal blade 54 on the front surface 52 of the outlet. In addition, the conductor 57 is grounded by the ground wire 58, so that a minute current flowing through the conductor 57 is released to the ground wire 58.

If the terminal blades 54, 54 of the power outlet 53 are plugged in for a long time, dust will appear between the plug surface 55 and the outlet front 52 as shown in Fig. 7 (b). 59 deposits. This dust 59 becomes conductive when wet, Cause trouble. As shown in FIG. 7 (c), in the outlet 51 having the above structure, the conductor 57 formed on the outlet front surface 52 acts so as to release the minute current flowing in the dust 59 to the ground wire 58. . As a result, the formation of carbonized conductive paths between the terminal blades 54 of the power plug 53 can be prevented.

[0004] By the way, when the power plug 53 is heavy or when a user or the like comes in contact with it, the cord 53a may be pulled and the plug of the power plug 53 into the outlet 51 may be incomplete. For example, as shown in FIGS. 8 (a) and 8 (b), when the gap between the plug surface 55 and the outlet front surface 52 is large, the dust 59 does not contact the conductor 57 formed on the outlet front surface 52. There is a possibility of depositing so as to fill between the terminal blades 54. In this case, the minute current flowing in the dust 59 cannot be released to the ground wire 58 via the conductor 57. Therefore, a carbonized conductive path is formed between the terminal blades 54 and 54. In other words, the progress of tracking cannot be prevented. Thus, various studies have been made so far in order to reliably prevent tracking even when the gap between the plug surface 55 and the outlet front surface 52 is large as described above. A device is disclosed.

[0005] For example, Patent Document 1 has the name "leakage prevention type outlet and outlet cover", and dust that accumulates between the plug and the outlet when the blade of the plug is inserted into an outlet that is embedded in a wall and attached. An invention relating to an outlet and an outlet cover for preventing electric leakage caused by the electric power is disclosed.

The present invention is characterized in that a hook is formed on the outlet or the outlet cover so as to cover the gap between the outlet and the plug at the upper part of the insertion port into which the blade of the plug is inserted.

In the outlet or outlet cover having such a structure, the ridge provided in the upper part of the insertion port acts to prevent dust accumulation on the blade exposed from the gap between the outlet and the plug. This reduces the occurrence of electrical leakage and fire due to dust accumulation.

[0006] Next, Patent Document 2 describes the tracking phenomenon by preventing the accumulation of dust in the gap between an insertion plug of an electric appliance or the like and an outlet or a tap with the name "commercial power supply connector". An invention relating to a commercial power connector capable of preventing occurrence is disclosed. The present invention is characterized in that an outlet or a tap seat into which a plug or tap contact piece is inserted is recessed from the peripheral portion thereof.

In the “commercial power supply connector” having such a structure, the side wall of the recess covers the plug and the contact piece of the tap, so that it is difficult for dust to accumulate in the gap between the plug and the outlet or the tap. Thereby, the occurrence of the tracking phenomenon is prevented.

[0007] Patent Document 3 discloses an invention relating to a power supply connection device having the name "power supply connection device", which can prevent the generation of heat and fire due to the accumulation of dust around it.

The present invention relates to a cut-off type movable member that can be moved forward and backward in a direction parallel to a terminal in a predetermined area of a plane in which a pair of terminals are planted or a plane in which a pair of terminal receivers are arranged in a power connection device such as an AC adapter or an outlet One of the eaves-type movable member and the enclosure-type movable member is arranged.

In the “power connection device” having such a structure, even when a gap is generated between the power connection devices when the power connection devices are connected to each other, the movable member acts so as to fill a part of the gap. . Therefore, it is possible to prevent dust from accumulating at the important points of the power connection device and to increase the safety of the power connection device.

[0008] Patent Document 1: Japanese Patent Application Laid-Open No. 2003-303641

Patent Document 2: Japanese Patent Laid-Open No. 8-83639

Patent Document 3: Japanese Patent Laid-Open No. 2000-30790

Disclosure of the invention

Problems to be solved by the invention

[0009] However, in the invention disclosed in Patent Document 1, which is the above-described prior art, the outlet front force has a structure in which the ridges protrude, so that the plug is not particularly connected to the outlet. If not, the person could come into contact with the heel and get injured or the heel could be damaged. Also, if the plug is too thick, the trap will get in the way and the blade cannot be fully inserted into the outlet, and if the plug is too thin, the gap between the top surface of the plug and the kite will increase, preventing dust accumulation. There was a problem.

[0010] In the invention disclosed in Patent Document 2, an insertion plug larger than the recess is used. In addition, if the plug is too small compared to the dent, the side wall of the dent will not adequately cover the contact piece of the plug, so dust will easily accumulate in the gap between the plug and the outlet. Become. In other words, there is a problem that usable plugs are limited depending on the size of the recess.

[0011] In the invention disclosed in Patent Document 3, dust drifting in the air enters the gap generated when the power connection devices are connected from all directions. There was a problem that the intrusion of dust could not be stopped and stopped. In addition, when the AC adapter is installed at an angle with respect to the outlet, the gap between the AC adapter and the outlet cannot be completely covered even if the surrounding movable member is used. There was a problem of accumulation. In addition, there was a problem that tracking that was already attached to the AC adapter before being plugged into the outlet and caused by bowing by the dust could not be prevented.

[0012] The present invention has been made in response to the striking conventional situation, and provides a receptacle capable of reliably preventing the occurrence of tracking even when the gap between the front surface of the outlet and the plug surface is large. With the goal.

Means for solving the problem

[0013] In order to achieve the above object, the tracking prevention outlet according to the invention described in claim 1 has at least a pair of through holes formed so that the terminal blades of the power plug can be inserted, and the through holes are formed. An outlet body in which a recess is formed in at least a part of the periphery of the hole, a movable body accommodated in the recess, and an elastic member that urges the front surface of the movable body to be able to contact the plug surface of the power plug. It is characterized by comprising.

According to the tracking prevention outlet of the above structure, when the plug surface and the front surface of the outlet body are substantially parallel because the power plug is not fully inserted into the outlet, there is a gap between them. The movable body urged by the elastic member protrudes from the front surface of the outlet body, and has an action of bringing the front surface into contact with the plug surface of the power plug. In this case, the gap between the front surface of the movable body and the plug surface of the power plug becomes small, so that it is difficult for dust to accumulate.

[0014] The invention described in claim 2 is the tracking prevention described in claim 1. In the outlet, the recess is provided with a locking portion that can be locked to a part of the movable body, and the front surface of the movable body protrudes from the front surface of the outlet body until it is urged by the elastic member and locked to the locking portion. At the same time, when the terminal blade is inserted into the through-hole, it forms a substantially same plane as the front surface of the outlet body.

In the tracking prevention outlet with such a structure, when the outlet is not used, the locking part adjusts the protruding amount of the movable body so that the front surface of the movable body does not protrude more than the predetermined amount of the front force of the outlet body. It has the action.

[0015] The invention according to claim 3 is the tracking prevention outlet according to claim 2, wherein the movable body includes a pair of support shaft portions on the side surface, and the pair of support shaft portions is The movable body is pivotally supported with respect to the front surface of the outlet main body around the support shaft portion, and is urged by an elastic member. It can be tilted.

In an anti-tracking outlet having such a structure, either the upper end or the lower end of the plug surface is in contact with the front surface of the outlet, and the terminal blade of the power plug is in a state where the plug surface is inclined with respect to the front surface of the outlet body. When inserted into the through hole of the outlet body, the movable body tilts and the front surface thereof comes into contact with the plug surface.

[0016] The invention according to claim 4 is the tracking prevention outlet according to claim 2, wherein the movable body includes a pair of support shafts on a side surface, and the pair of support shafts includes: Instead of the latching portion, the recess is pivotally supported by a receiving portion provided to be able to advance and retreat, and the movable body is accommodated so as to be tiltable with respect to the front surface of the outlet body with the support shaft portion as a center, and is elastic. It can be tilted by urging the member.

In an anti-tracking outlet having such a structure, both the upper and lower ends of the plug surface are separated from the front surface of the outlet body, and the terminal blade of the power plug is connected to the outlet body while the plug surface is inclined with respect to the front surface of the outlet body. When inserted into the through hole, the movable body protrudes from the front surface of the outlet body and tilts to bring the front surface into contact with the plug surface.

[0017] The invention described in claim 5 is any one of claims 1 to 4. The tracking preventing outlet according to item 1 is characterized by comprising a conductor formed on the front surface of the movable body and a ground wire connected to the conductor. In the tracking prevention outlet having such a structure, when dust accumulates in the gap between the plug surface and the front surface of the movable body, and a minute current flows through the dust, the conductor formed on the front surface of the movable body is It acts to let this minute current escape to the ground wire.

[0018] The invention described in claim 6 is the tracking preventing outlet according to any one of claims 1 to 4, wherein the recess is formed so as to surround the through hole. A first conductor and a second conductor formed on the front surface of the movable body accommodated in the recess, and a ground wire connected to the first conductor and the second conductor, The first conductor is formed so as to surround the pair of through holes, and the second conductor is formed between the pair of through holes.

In the tracking prevention outlet having such a structure, the first conductor and the second conductor are accumulated between both terminal blades of the power plug and absorb the moisture in the air and become conductive dust. It acts to release the minute current flowing through the ground wire.

[0019] The invention described in claim 7 is characterized in that, in the tracking prevention outlet according to claim 6, the second conductor extends on the front force side surface of the movable body. Is.

In the tracking prevention outlet having such a structure, the second conductor acts so as to let the minute current flowing in the dust accumulated on the front and side surfaces of the movable body to the ground wire. The invention's effect

[0020] As described above, in the anti-tracking outlet according to claim 1 of the present invention, the power plug is completely inserted into the outlet. When there is a gap between the front surface and the front surface, it is possible to reduce the amount of dust that accumulates on the brass surface and make tracking difficult.

[0021] In the anti-tracking outlet according to claim 2 of the present invention, since the movable body does not protrude more than necessary in the case of using the outlet, the user's etc. There is no danger of injury from touching or damage to the movable body. [0022] In the tracking preventing outlet according to claim 3 of the present invention, either the upper end or the lower end of the plug surface is in contact with the front surface of the outlet, and the plug surface is inclined with respect to the front surface of the outlet body. In this state, when the power plug terminal blade is inserted into the through hole of the outlet body, it is possible to reduce the dust accumulated on the plug surface and prevent tracking.

[0023] In the tracking preventing outlet according to claim 4 of the present invention, both the upper and lower ends of the plug surface are separated from the front force of the outlet body, and the plug surface is inclined with respect to the front surface of the outlet body. When the power plug terminal blade is inserted into the through hole of the outlet body, it is possible to reduce the amount of dust accumulated on the plug surface and prevent tracking.

[0024] According to the tracking preventing outlet according to claim 5 of the present invention, the minute current flowing in the dust accumulated between the plug surface of the power plug and the front surface of the movable body is released to the ground wire. Thus, formation of carbonized conductive paths on the plug surface can be prevented.

[0025] According to the tracking preventing outlet according to claim 6 of the present invention, it is possible to prevent the formation of carbonized conductive paths that linearly connect the terminal blades of the power plug on the front surface of the movable body. Is possible.

[0026] In the tracking preventing outlet according to claim 7 of the present invention, it is possible to prevent the formation of a carbonized conductive path that connects between the terminal blades of the power plug via the front surface and the side surface of the movable body. .

Brief Description of Drawings

FIG. 1 (a) is an external perspective view of a tracking prevention outlet according to the first embodiment of the present invention, and (b) and (c) are external perspective views of an outlet body and a movable body, respectively. It is.

[FIG. 2] (a) and (b) are a cross-sectional view taken along line X-X and a line Y-Y taken when the power plug is completely inserted in FIG. 1 (a).

[FIG. 3] (a) and (b) are a cross-sectional view taken along line X-X and a line Y-Y taken when the power plug is not fully inserted in FIG. 1 (a).

[FIG. 4] (a) and (b) are front views of the outlet body and the movable body of the tracking prevention outlet according to the second embodiment of the present invention, respectively, and (c) is a side view of the movable body. is there. [FIG. 5] (a) to (c) are longitudinal sectional views of a tracking preventing outlet according to the second embodiment.

[FIG. 6] (a) to (c) are longitudinal sectional views of a tracking preventing outlet according to a third embodiment of the present invention.

[FIG. 7] (a) is a perspective view of a tracking preventing outlet according to the prior art, and (b) and (c) are a side view and a plan view showing a state in which a power plug is inserted into the outlet body, respectively.

[Fig. 8] (a) and (b) are a side view and a plan view, respectively, showing a state in which the power plug is incompletely inserted into the tracking outlet shown in Fig. 7.

Explanation of symbols

la Tracking prevention outlet

lb Tracking prevention outlet

LC tracking prevention outlet

2a Outlet body

2b Outlet body

2c Outlet body

3 Front of outlet

4a Through hole

4b Through hole

4c Through hole

5a recess

5b recess

5c recess

6a movable body

6b movable body

7a upper side

7b lower side

7c Left side d Right side Stepped part a Movable body front b Movable body back 0a Conductor 0b Conductor 1 Ground wire 2 Elastic member 3 Locking part 4 Power plug 4a Cord 5 Terminal blade 6 Receptacle

7 Plug surface 7a Upper end 7b Lower end 8 Dust

9 Support shaft part 0a Receiving part 0b Receiving part 1 Projecting part 1a Upper edge 1b Lower edge 2a Upper inner wall 2b Lower inner wall 1 Outlet 2 Outlet front 3 Power plug 53a code

54 Terminal blade

55 Plug surface

56

57 Conductor

58 Ground wire

59 dust

A arrow

B Arrow

BEST MODE FOR CARRYING OUT THE INVENTION

[1] The tracking preventing outlet according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 3 (particularly corresponding to claims 1, 2, 5 to 7). . FIG. 1 (a) is an external perspective view of a tracking preventing outlet according to the first embodiment of the present invention, and FIGS. 1 (b) and (c) are external perspective views of an outlet body and a movable body, respectively. 2 (a) and 2 (b) are a cross-sectional view taken along line X-X and a line Y-Y taken when the power plug is completely inserted in FIG. 1 (a). 3 (a) and 3 (b) are a cross-sectional view taken along line X-X and a line Y-Y when the power plug is not fully inserted in FIG. 1 (a).

As shown in FIGS. 1 (a) to (c), the wall-buried type anti-tracking outlet la has a pair of through holes 4a into which the terminal blade of the power plug is inserted in the outlet front surface 3. In addition, an outlet body 2a having a recess 5a formed so as to surround the through hole 4a and a movable body 6a accommodated in the recess 5a are provided. Further, as will be described later, an elastic member for urging the movable body 6a is attached to the recess 5a. The movable body 6a is provided with through holes 4b and 4b into which the protruding portions 21 and 21 of the outlet body 2a can be inserted, and a step 8 is provided behind the upper side surface 7a and the lower side surface 7b. ing. The conductor 10a is formed on the movable body front surface 9a so as to surround the through holes 4b and 4b, and the conductor 10b is formed between the through holes 4b and 4b. The conductor 10b extends from the front surface 9a of the movable body to the upper side surface 7a and the lower side surface 7b, respectively, and is grounded by a ground wire 11 connected to the end thereof. [0030] As shown in Figs. 2 (a) and (b), the movable body 6a accommodated in the recess 5a can move forward and backward in the directions indicated by arrows A and B, and in a compressed state. It is attached to the movable body back surface 9b and is urged in the direction indicated by the arrow A by the coil spring-shaped elastic member 12. Further, the stepped portion 8 of the movable body 6a can be locked to a locking portion 13 provided near the outlet front surface 3 of the recess 5a. If the power plug 14 is attached to the tracking prevention outlet la, the stepped portion 8 of the movable body 6a is locked to the locking portion 13. That is, as already shown in FIG. 1 (a), the movable body front surface 9a has a structure that does not protrude beyond a predetermined amount from the outlet front surface 3 of the outlet body 2a. Therefore, there is no possibility that the user or the like will come in contact with it and get injured or the movable body 6a may be damaged.

When the power plug 14 is attached to the tracking prevention outlet la, the movable body 6a moves in the direction indicated by the arrow B. When the terminal blade 15 of the power plug 14 is fully inserted into the through hole 4a of the outlet body 2a, the movable body front surface 9a forms substantially the same plane as the outlet front surface 3. A pair of receiving blades 16 and 16 connected to a power source (not shown) are installed in the through holes 4a and 4a of the outlet main body 2a, and the terminal blades 15 and 15 of the power plug 14 are sandwiched between them. It has a structure to wear. Thereby, the power plug 14 is fixed to the tracking preventing outlet la.

[0031] By the way, when the power plug 14 is pulled by, for example, a user hooking the cord 14a, the power source for the tracking prevention outlet la as shown in FIGS. 3 (a) and 3 (b). The plug 14 may be incompletely inserted, and the gap between the plug surface 17 and the outlet front 3 may become large. In such a case, the tracking preventing outlet la has the effect that the movable body 6a protrudes in the direction indicated by the arrow A to reduce the gap between the movable body front surface 9a and the plug surface 17. This makes it difficult for dust 18 to accumulate between the terminal blades 15 of the power plug 14. Even if dust 18 accumulates between the terminal blades 15 of the power plug 14, the dust 18 with a small gap between the movable body front surface 9a and the plug surface 17 is in contact with the conductors 10a and 10b. The flowing minute current is released to the ground wire 11 through the conductors 10a and 10b. In addition, the conductor 10b extending to the upper side surface 7a and the lower side surface 7b of the movable body 6a is finely flowing between the terminal blades 15 via the dust 18 accumulated on the upper side surface 7a or the lower side surface 7b of the movable body 6a. When the current is released to the ground wire 11, it has a negative effect. [0032] In the tracking prevention outlet according to the present embodiment, when the power plug is not completely inserted into the outlet, the gap between the plug surface and the front surface of the outlet remains substantially parallel. By allowing the front surface of the movable body to come into contact with the plug surface, it is possible to reduce room for dust accumulation. This makes it difficult for dust to accumulate. In addition, even if dust accumulates on the plug surface and a minute current flows between the terminal blades of the power plug via the dust, the minute current is reduced by the conductor formed on the front surface of the movable body. It is possible to quickly escape to the line. In addition to the formation of carbonized conductive paths that linearly connect the terminal blades of the power plug, carbonized conductive paths that connect the terminal blades via the front and upper sides of the movable body or the front and lower sides. Can also be prevented. That is, the tracking preventing outlet according to the present invention can prevent the occurrence of tracking by making it difficult to deposit dust on the plug surface after the power plug is inserted into the outlet. In addition, tracking caused by dust adhering to the plug surface before use cannot be dealt with by a conventional outlet which mainly focuses on preventing dust accumulation during use. On the other hand, according to the tracking prevention outlet of the present invention, even when dust is attached to the plug surface in advance, the fine current flowing in the dust can be released to the ground wire by the conductor pressed against the dust. This ensures that tracking is prevented.

[0033] In the tracking prevention outlet la of the present embodiment, the force with a pair of through holes 4a into which the terminal blades 15 of the power plug 14 are inserted is not limited to this. For example, two or more pairs of through holes 4a It is good also as a structure provided with. Further, instead of forming the recess 5a so as to surround the through hole 4a, a structure in which the recess 5a is formed in at least a part of the periphery of the through hole 4a may be adopted. For example, the movable body 6a in which the concave portion 5a is formed between the pair of through holes 4a and 4a and only the conductor 10b is formed on the movable body front surface 9a can be accommodated in the concave portion 5a. In this case, since the structure of the tracking prevention outlet la is simplified, the manufacturing becomes easy. Furthermore, the conductors 10a and 10b are not necessarily required to form both, and may have a structure in which only one of them is formed. Alternatively, the conductor 10a and the conductor 10b may be separately connected to the ground wire 11 without being connected to each other. For example, it can be guided to at least one of the left and right side surfaces only by the upper side surface 7a and the lower side surface 7b of the movable body 6a. A structure in which the electric body 10b is extended may be employed. Further, the elastic member 12 is not limited to a coil spring shape and can be changed as appropriate. That is, an elastic material such as rubber may be used.

[2] A tracking preventing outlet according to the second embodiment of the present invention will be described below with reference to FIGS. 4 and 5 (particularly corresponding to claim 3).

FIGS. 4 (a) and 4 (b) are front views of the outlet body and the movable body of the tracking prevention outlet according to the second embodiment of the present invention, respectively, and (c) is a side view of the movable body. FIGS. 5 (a) to 5 (c) are longitudinal sectional views of the tracking preventing outlet according to the second embodiment. FIG. 5 (a) corresponds to FIG. 2 ( _a ) showing the case where the power plug is completely inserted in FIG. 2 (a) and FIG. 3 (a) showing the first embodiment. Figures 5 (b) and 5 (c) correspond to Figure 3 ( _a ), which shows the case where the power plug is not fully inserted. Also, the components shown in FIGS. 1 to 3 are denoted by the same reference numerals and description thereof is omitted.

As shown in Figs. 4 (a) to 4 (c), the tracking preventing outlet lb is movable in the tracking preventing outlet la of the first embodiment with stepped portions 8 provided on the upper side surface 7a and the lower side surface 7b. In place of the body 6a, the left side 7c and the right side 7d are replaced with a movable body 6b having a pair of support shafts 19, 19 and an outlet body 2a having a locking part 13 in the recess 5a. And a receptacle body 2b having a pair of receiving portions 20a, 20a each having a cylindrical inner wall surface, and the support shaft portions 19, 19 are supported by the pair of receiving portions 20a, 20a. It is a sign. The movable body 6b is accommodated in the recess 5b so as to be tiltable with respect to the front surface 3 of the outlet around the support shaft portions 19 and 19, and the movable body 6b is an elastic member 12 installed on the movable body rear surface 9b. It can be tilted by urging. As shown in FIG. 4 (c), the upper and lower inner wall surfaces of the through hole 4c near the front surface 9a of the movable body have a substantially arc shape when viewed from the side, and are movable around the support shaft portions 19 and 19. When tilting the body 6b, do not interfere with the upper edge 21a and the lower edge 2lb of the protruding part 21 of the outlet body 2b. RU

When the power plug 14 is completely inserted into the tracking prevention outlet lb having such a structure, the movable body front face 9a is substantially parallel to the outlet front face 3 as shown in FIG. 5 (a). On the other hand, when the upper end 17a of the plug surface 17 is in contact with the front surface 3 of the outlet and the plug surface 17 is inclined with respect to the front surface 3 of the outlet, the movable body 6b is moved by the bias of the elastic member 12. As shown in FIG. 5 (b), the movable body front surface 9a is substantially in contact with the plug surface 17. Further, when the lower end 17b of the plug surface 17 is in contact with the front surface 3 of the outlet and the plug surface 17 is inclined with respect to the front surface 3 of the outlet, the movable body 6b is moved as shown in FIG. As shown in c), the movable body front surface 9a is substantially in contact with the plug surface 17 as shown in FIG.

[0035] As described above, in the tracking prevention outlet according to the present embodiment, since the power plug is not completely inserted into the outlet, either the upper end or the lower end of the plug surface is in contact with the front surface of the outlet. In this state, when the plug surface is inclined with respect to the front surface of the outlet, the movable body is tilted so that the front surface of the movable body is brought into contact with the plug surface, so that it is difficult to accumulate dust. Also, even if dust accumulates in the gap between the plug surface and the movable body front and a minute current flows through the dust, the minute current is quickly released to the ground wire by the conductor formed on the movable body front. be able to. This can prevent tracking.

[0036] The tracking prevention outlet of the present invention is not limited to the structure shown in the present embodiment, and can be appropriately changed. For example, in the tracking prevention outlet lb, instead of pivotally supporting the support shaft portions 19 and 19 provided on the left side surface 7c and the right side surface 7d of the movable body 6b by the receiving portions 20a and 20a provided on the left and right inner wall surfaces of the recess portion 5b, The support 6 and 19 are provided on the upper surface 7a and the lower surface 7b of the movable body 6b, and the support shafts 19 and 19 are supported by the receiving portions 20a and 20a provided on the upper and lower inner wall surfaces of the recess 5b. It is also good. At this time, the movable body 6b accommodated in the recess 5b is tilted with respect to the front surface 3 of the outlet around the support shaft portions 19 and 19, and is attached with the elastic member 12 installed on the movable body back surface 9b. Can be tilted by the force. Therefore, when either the left end or the right end of the plug surface 17 is in contact with the outlet front surface 3 and the plug surface 17 is inclined to the left and right with respect to the outlet front surface 3, the movable body 6b is The elastic member 12 is tilted in the left-right direction by the urging force of the elastic member 12, and the movable body front surface 9a is brought into substantially contact with the plug surface 17.

[0037] [3] Hereinafter, a tracking preventing outlet according to the third embodiment of the present invention will be described with reference to FIG. 6 (particularly corresponding to claim 4).

FIGS. 6 (a) to 6 (c) are longitudinal sectional views of a tracking preventing outlet according to the third embodiment of the present invention. Fig. 6 (a) shows the insertion of the power plug in the second embodiment. Fig. 6 (b) and Fig. 6 (c) show the case where the power plug is not fully inserted in the second embodiment. And (c). The components shown in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIGS. 6 (a) to 6 (c), the anti-tracking outlet lc is provided in the recess 5c of the main body 2c of the second embodiment in place of the pair of receiving parts 20a and 20a in the anti-tracking outlet lb of the second embodiment. Are provided with a pair of receiving portions 20b, 20b whose inner wall has a transverse cross section parallel to the insertion direction of the power plug 14, and the support shaft portions 19, 19 of the movable body 6b are the receiving portions 20b, 20b. It is characterized by being pivotally supported so as to be able to advance and retreat. Note that the upper end inner wall surface 22a and the lower end inner wall surface 22b of the recess 5c in the vicinity of the outlet front surface 3 are substantially parallel to the insertion direction of the power supply plug 14, and the movable body 6b protrudes and the supporting shaft portions 19, 19 are attached. When tilted as the center, the movable body 6b does not interfere with the upper side surface 7a and the lower side surface 7b.

In the tracking prevention outlet lc having such a structure, when the power plug 14 is completely inserted, the movable body front face 9a forms substantially the same plane as the outlet front face 3 as shown in FIG. 6 (a). On the other hand, when the upper end 17a and the lower end 17b of the plug surface 17 are both separated from the outlet front surface 3 and the plug surface 17 is inclined with respect to the outlet front surface 3, the movable body 6b is moved as shown in FIG. As shown in (b) or (c), the movable body front surface 9a protrudes from the outlet front surface 3 and tilts so that the movable body front surface 9a substantially contacts the plug surface 17.

As described above, in the anti-tracking outlet according to the present embodiment, the plug surface is inclined with respect to the front surface of the outlet due to incomplete insertion of the power plug into the outlet, and the upper and lower ends of the plug surface. Even if both of them are separated from the front surface of the outlet, the movable body protrudes and tilts so that the front of the movable body abuts against the plug surface, making it difficult to accumulate dust. is there. Even if dust accumulates in a slight gap between the plug surface and the front of the movable body, the dust contacts the conductor formed on the front of the movable body, so that the dust flowing between the terminal blades of the power plug via the dust The current is quickly released to the ground wire through the conductor. Therefore, it is possible to reliably prevent the occurrence of tracking. Industrial applicability

As described above, the invention described in claims 1 to 7 can be applied to, for example, a table tap that is used only by an outlet embedded in a wall surface.

Claims

The scope of the claims

[1] At least a pair of through holes are formed so that the terminal blade of the power plug can be inserted.

An outlet body having a recess formed in at least a part of the periphery of the through hole, a movable body accommodated in the recess, and a front surface of the movable body are attached to be able to abut against a plug surface of the power plug. An anti-tracking outlet characterized by comprising an elastic member.

[2] The concave portion is provided with a locking portion that can be locked to a part of the movable body, and the front surface of the movable body is urged by the elastic member until locked to the locking portion. The tracking prevention according to claim 1, characterized in that it protrudes from the front surface of the main body and forms substantially the same plane as the front surface of the outlet main body when the terminal blade is inserted into the through hole. Outlet.

[3] The movable body includes a pair of support shaft portions on a side surface, and the pair of support shaft portions are pivotally supported by a receiving portion provided in the recess instead of the locking portion. 3. The device according to claim 2, characterized in that it is accommodated so as to be tiltable with respect to the front surface of the outlet body about the support shaft portion, and can be tilted by urging of the elastic member. Anti-tracking outlet described.

[4] The movable body includes a pair of support shaft portions on a side surface, and the pair of support shaft portions is a receiving portion provided in the recess so as to be able to advance and retract the support shaft portion instead of the locking portion. The movable body is pivotally supported, and is accommodated so as to be tiltable with respect to the front surface of the outlet body about the support shaft portion, and is tiltable by the biasing of the elastic member. Range Tracking outlet according to item 2.

[5] The method according to any one of claims 1 to 4, further comprising: a conductor formed on a front surface of the movable body; and a ground wire connected to the conductor. Anti-tracking outlet described in 1.

[6] The recess is formed so as to surround the through hole, and the first conductor and the second conductor formed on the front surface of the movable body accommodated in the recess, and the first conductive And a ground wire connected to the second conductor, the first conductor is formed to surround the pair of through holes, and the second conductor is intermediate between the pair of through holes. The tor of any one of claims 1 to 4 is formed. Anti-racking outlet.

7. The tracking preventing outlet according to claim 6, wherein the second conductor is extended to a front force side surface of the movable body.