JP2006048961A - Power outlet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power outlet to which a sensor can be fitted easily, and which secures an insulation distance between the sensor and a receiving blade. <P>SOLUTION: A pair of plug insertion slots 6, 6 are formed in the front of a cover 4 of an outlet case 2 made of an insulation material, and a through-hole 7 is formed between the plug insertion slots 6, 6. A receiving blade 17 for pinching a blade of a plug is arranged inside the plug insertion slots 6, and a partition 13 is formed between the receiving blades 17, 17. A sensor 16, which is connected to the receiving blades 17 and detects a spark discharge occurring between the blades of the plug, is placed in the partition 13 so as to face the through-hole 7 of the cover 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power outlet that detects a spark discharge that occurs before tracking and prevents the occurrence of tracking.

  Conventionally, there is a power outlet shown in Patent Document 1 having a function of preventing tracking. In Patent Document 1, a conductive plate is disposed between the receiving blades on the front surface of the power outlet, one end protrudes from the surface, and the other end is connected to the ground terminal, so that when a spark discharge occurs before tracking occurs. The electric current flowing between the two blades of the plug is passed through the conductive plate to the ground terminal, and the electric leakage breaker is detected as the electric leakage current to interrupt the electric circuit.

JP 2001-35599 A

  In the conventional power outlet, the conductive plate, which is a sensor that detects spark discharge that occurs before tracking, is exposed on the surface of the power outlet. It is also possible that the plug user's hand will come into contact, which is not preferable. In view of this, the present applicant has proposed a power outlet capable of detecting spark discharge without exposing the sensor to the surface of the power outlet according to Japanese Patent Application No. 2003-120546. This power outlet shows a method for attaching the sensor to the back of the cover with an insulator such as resin from the back as a sensor mounting structure, but it is said that the workability is poor because fine work must be done in a narrow space There were drawbacks. In addition, when the insulator is removed, the insulation distance between the receiving blade and the sensor cannot be secured, and furthermore, the connection between the sensor and the printed circuit board is made via the lead wire, so soldering is necessary, which is troublesome. It was hanging.

  According to the first aspect of the present invention, one or more pairs of plug insertion holes are formed on the front surface of the outlet case formed of an insulating material, and the plug blade of the plug is formed inside the plug insertion hole. In a power outlet comprising a receiving blade that sandwiches the plug, a through hole is formed between the plug insertion openings, and a sensor that detects a spark discharge generated between the plug blades is disposed inside the through hole. Is characterized in that a partition wall is formed between the receiving blades, and a sensor is provided in the partition wall so that a part thereof faces the through hole.

  According to the second aspect of the present invention, in the power outlet according to the first aspect, the outlet case includes a main body having an open front surface, a cover attached to the front opening of the main body, and an internal space formed by the main body and the cover. And an intermediate base that holds the receiving blade, and a partition wall is formed on the intermediate base.

  According to a third aspect of the present invention, in the power outlet according to the first or second aspect, a sensor is insert-molded in the partition wall.

  According to a fourth aspect of the present invention, the power outlet according to the first or second aspect is characterized in that the mounting groove is formed in the partition wall and the sensor is fitted into the mounting groove.

  According to the invention described in claim 5, in the power outlet according to any one of claims 1 to 4, the printed circuit board is disposed in the space formed behind the partition wall, and the sensor is formed of a metal plate. And extending to the printed circuit board, and being inserted into an insertion terminal provided on the printed circuit board to be electrically connected.

  According to a sixth aspect of the present invention, in the power outlet according to any one of the first to fourth aspects, the printed circuit board is disposed in a space formed behind the partition wall, and the sensor is formed of a metal plate. The sensor or the printed circuit board side connection terminal is formed so as to be elastically deformable, and both are brought into contact with each other to be electrically connected.

  According to the first aspect of the present invention, one or more pairs of plug insertion holes are formed on the front surface of the outlet case formed of an insulating material, and the plug blade of the plug is formed inside the plug insertion hole. In a power outlet comprising a receiving blade that sandwiches the plug, a through hole is formed between the plug insertion openings, and a sensor that detects a spark discharge generated between the plug blades is disposed inside the through hole. Since a partition is formed between the receiving blades and the sensor is provided in the partition so that part of the sensor faces the through hole, the sensor can be easily mounted and the insulation distance between the sensor and the receiving blade is ensured. There is an effect that can be done.

  According to the second aspect of the present invention, in the power outlet according to the first aspect, the outlet case includes a main body having an open front surface, a cover attached to the front opening of the main body, and an internal space formed by the main body and the cover. The intermediate base which is housed in the intermediate base and holds the receiving blade, and the partition wall is formed on the intermediate base, so that the assembling workability is improved.

  According to the third aspect of the present invention, in the power outlet according to the first or second aspect, since the sensor is insert-molded in the partition wall, there is an effect that the mounting work of the sensor can be eliminated.

  According to the fourth aspect of the present invention, in the power outlet according to the first or second aspect, the mounting groove is formed in the partition wall, and the sensor is fitted into the mounting groove, thereby mounting the sensor. There is an effect that can be easily done.

  According to the invention described in claim 5, in the power outlet according to any one of claims 1 to 4, the printed circuit board is disposed in the space formed behind the partition wall, and the sensor is formed of a metal plate. Then, the sensor and the printed circuit board can be easily connected by extending to the printed circuit board and inserting and electrically connecting to an insertion terminal provided on the printed circuit board.

  According to a sixth aspect of the present invention, in the power outlet according to any one of the first to fourth aspects, the printed circuit board is disposed in a space formed behind the partition wall, and the sensor is formed of a metal plate. The sensor can be easily connected to the printed circuit board by extending to the printed circuit board, forming the connection terminal on the sensor or the printed circuit board side so as to be elastically deformable, and bringing them into contact with each other for electrical connection. There is.

  A pair of plug insertion openings are formed on the front surface of the outlet case formed of an insulating material, and a through hole is formed between the plug insertion openings. A receiving blade for holding the plug blade of the plug is disposed inside the plug insertion opening, and a partition is formed between the receiving blades. A sensor for detecting spark discharge generated between the plug blades of the plug connected to the receiving blade is provided in the partition wall so as to face the through hole.

  A first embodiment of a power outlet according to the present invention will be described with reference to the accompanying drawings of FIGS.

  The power outlet 1 has an outlet case 2 made of an insulating material. When the front view of FIG. 1 is the front and the longitudinal direction is the vertical direction, the outlet case 2 has a main body 3 with an open front and a front opening of the main body 3. The cover 4 is attached to the main body 3, and the intermediate base 5 is sandwiched between the main body 3 and the cover 4 with the upper and lower ends sandwiched therebetween and stored in the internal space.

  The cover 4 has a pair of plug insertion ports 6 and 6 for inserting plug blades (not shown) on the front surface formed at two locations, the center and the lower portion, and an intermediate between the plug insertion ports 6 and 6. A through hole 7 is formed at the position. A breaker handle 8, a display lamp 9, and a test button 10 that operate during tracking face the upper portion of the cover 4.

  In the intermediate base 5, a rising portion 12 is formed on the entire circumference of the rectangular plate portion 11, and a partition wall 13 extending to the back surface of the cover is formed at an intermediate position in the short direction. A hole 14 is formed at the front end of the partition wall 13 at a position facing the through hole 7 of the cover 4, and a mounting groove 15 continuous with the hole 14 is formed at the rear end of the partition wall 13. The mounting groove 15 is fitted with a sensor 16 made of a metal piece so that a part of the sensor 16 faces the hole 14, and the rear end of the sensor 16 is provided so as to be exposed from the back surface of the intermediate base 5. Yes. The sensor 16 is insert-molded into the partition wall 13 so that the mounting effort can be saved. Further, the sensor 16 may be a conductive member without being a metal plate. The receiving blades 17 for holding the plug blades on the left and right sides through the partition wall 13 are respectively positioned and arranged by the rising portion 12 and the partition wall 13, and the upper and lower receiving blades 17 are of the same polarity, so that the connecting portion 18. Are connected by Connected to the receiving blade 17 is an electric wire 21 connected to an insertion terminal 20 of a main body 3 to which a cable 19 extending from a distribution board or the like is connected, or a power supply electric wire 23 having one end connected to a printed circuit board 22 described later. ing.

  In a space formed behind the intermediate base 5, a printed circuit board 22 on which various circuits such as a tracking detection circuit and a power supply circuit are mounted is accommodated in parallel with the rectangular plate portion 11 of the intermediate base 5. One end of a lead wire 24 is connected to the printed circuit board 22, the other end is connected to the rear end of the sensor 16, and the sensor 16 is electrically connected to the tracking detection circuit. A breaker (not shown) is accommodated in a space formed above the intermediate base 5.

  The tracking detection operation of the power outlet 1 will be described. Dust and the like accumulate between the plug blades of the plugs connected to the receiving blades 17 and 17 to absorb moisture in the air, so that a minute current is passed between the plug blades through moisture. Flows and the charged water vaporizes and sparks discharge. When a spark discharge enters from the through hole 7 and contacts the sensor 16, a minute current flows. The tracking detection circuit detects the tracking from the output current of the sensor 16, operates the breaker, and performs display by the display lamp 9.

  In this embodiment, the tip of the sensor 16 does not protrude from the partition wall 13, but the tip of the sensor 16 may protrude from the partition wall 13 as shown in FIG.

  Second Embodiment A power outlet according to the present invention will be described with reference to the accompanying drawings in FIGS. In addition, the same part as Example 1 attaches | subjects the same code | symbol, and abbreviate | omits description.

  In the present embodiment, the sensor 16 is formed in a substantially U-shape, and two sensors are integrally formed, and the rear end is provided so as to protrude from the back surface of the intermediate base 5. An insertion terminal 30 is provided on the front surface of the printed circuit board 22 at a position facing the rear end of the sensor 16. The sensor 16 can be electrically connected to the printed circuit board 22 only by inserting it into the insertion terminal 30. Since two sensors 16 are integrally formed, only one insertion terminal is required. When one sensor 16 is provided for each receiving blade 17, the number of insertion terminals 30 corresponding to the number of sensors 16 is required.

  A third embodiment of the power outlet according to the present invention will be described with reference to the attached drawing of FIG. In addition, the same part as Example 1 attaches | subjects the same code | symbol, and abbreviate | omits description.

  In the present embodiment, the rear end of the sensor 16 is provided so as to protrude from the back surface of the intermediate base 5, and a plate spring-like connection terminal 40 that can be elastically deformed at a position facing the rear end of the sensor 16 on the front surface of the printed circuit board 22. Is provided. As a result, when the power outlet 1 is assembled, the rear end of the sensor 16 comes into contact with the connection terminal 40 and can be electrically connected to the printed circuit board 22. The rear end of the sensor may be formed so as to be elastically deformable, and the two may be connected by contacting the connection terminal of the printed circuit board.

  Embodiment 4 of the power outlet according to the present invention will be described with reference to the attached drawing of FIG. In addition, the same part as Example 1 thru | or Example 3 attaches | subjects the same code | symbol, and abbreviate | omits description.

  In this embodiment, a partition wall 53 is integrally formed on the back surface of the cover 4. A through hole 52 is formed at an intermediate position in the short direction of the intermediate base 5 so that the partition wall 53 penetrates the through hole 52 during assembly.

  In Examples 1 to 4, a two-port power outlet that can connect two plugs is used. However, a single-port power outlet, an extension tap that can connect a plurality of plugs, or the like may be used. However, there is no limitation on the operation at the time of tracking detection. In addition, the intermediate base can be integrally formed with the main body, and the shape, structure, and function of the power outlet can be changed as appropriate without departing from the spirit of the present invention.

It is a front view of the power outlet concerning Example 1 of the present invention. It is the sectional view on the AA line of FIG. It is a perspective view which shows the intermediate | middle base of a power outlet. It is principal part sectional drawing which shows the deformation | transformation Example of a power outlet. It is a perspective view which shows the intermediate | middle base of the power outlet concerning Example 2 of this invention. It is principal part sectional drawing of the power outlet concerning Example 2 of this invention. It is principal part sectional drawing of the power outlet which concerns on Example 3 of this invention. It is principal part sectional drawing of the power outlet which concerns on Example 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power outlet 2 Outlet case 3 Main body 4 Cover 5 Intermediate base 6 Plug insertion port 7 Through-hole 13 Partition 14 Hole 15 Mounting groove 16 Sensor 17 Receiving blade 22 Printed circuit board 24 Lead wire

Claims (6)

  One or more pairs of plug insertion openings are formed on the front surface of the outlet case formed of an insulating material, and a receiving blade for holding the plug blade of the plug is disposed inside the plug insertion opening. In a power outlet in which a through hole is formed, and a sensor for detecting a spark discharge generated between the plug blades is disposed inside the through hole, the outlet case forms a partition wall between the receiving blades. A power outlet, wherein the sensor is provided in the partition so that part of the sensor faces the through hole.   The outlet case is formed by a main body having a front opening, a cover attached to the front opening of the main body, and an intermediate base that is housed in an internal space formed by the main body and the cover and holds the receiving blade, The power outlet according to claim 1, wherein the partition wall is formed on the intermediate base.   The power outlet according to claim 1 or 2, wherein the sensor is insert-molded in the partition wall.   The power outlet according to claim 1 or 2, wherein a mounting groove is formed in the partition wall, and the sensor is fitted into the mounting groove.   A printed circuit board is disposed in a space formed behind the partition, and the sensor is formed of a metal plate, extends to the printed circuit board, and is inserted into an insertion terminal provided on the printed circuit board to be electrically connected. The power outlet according to any one of claims 1 to 4, wherein the power outlet is provided.   A printed circuit board is disposed in a space formed behind the partition wall, the sensor is formed of a metal plate and extends to the printed circuit board, and the connection terminal on the sensor or the printed circuit board side is formed to be elastically deformable. The power outlet according to any one of claims 1 to 4, wherein both are brought into contact and electrically connected.

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