JP2016115520A - Power plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature sensor-equipped power plug which can reduce the weight of a power cord, while preventing a tracking phenomenon.SOLUTION: A power plug 1 comprises: a line-side terminal 10 which is insertable into a rectangular line-side insertion port provided on an outlet; a neutral-side terminal 20 which is insertable into a rectangular neutral-side insertion port provided on the outlet; a temperature sensor terminal 60 which has a device-side connection body 63 connectable to a signal core wire 53a and a neutral-side connection body 64; a housing 30 which contains one end of the line-side terminal 10, one end of the neutral-side terminal 20, and the temperature sensor terminal 60. The device-side connection body 63 of the temperature sensor terminal 60 is connected to the signal core wire 53a. At the same time, the neutral-side connection body 64 and the neutral-side terminal 20 are connected to each other in the housing 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a power plug having a tracking phenomenon prevention mechanism.

  Conventionally, in a large-capacity electrical apparatus such as an air conditioner, a large-sized TV, and a washing machine, a power plug may be left plugged in for a long time. In such a case, dust in the air between the power plug and the outlet includes moisture in the air, so that discharge is repeatedly generated between the plug blades of the plug, and the dust is carbonized. Electricity flows to the carbonized dust, etc., causing contact failure and raising the temperature of dust formed between the plug blades of the plug. This phenomenon is called “tracking phenomenon”).

As a power plug for preventing such a tracking phenomenon, for example, there is a power plug as disclosed in Japanese Patent Application Laid-Open No. 2014-75333.
More specifically, in the invention described in Patent Document 1, by providing at least one temperature sensor for each plug blade of the power plug, a plurality of temperature sensors detect the temperature change of the corresponding plug blade. It is a power plug that can be used. Since this power plug is provided with a temperature sensor for each plug blade of the power plug, there is a high correlation between the temperature detected by the temperature sensor and the temperature of each plug blade, and it is appropriate for the temperature rise of each plug blade. Therefore, a highly safe power plug can be provided.

  However, the power cord having a plurality of temperature sensors disclosed in Patent Document 1 has signal lines corresponding to the forward path and the return path for each temperature sensor, and the signal lines are connected to the electrical equipment along the power cord. Since they are connected, there is a problem that the power cord itself becomes heavy.

JP 2014-75333 A

  In view of the above problems, an object of the present invention is to provide a power plug with a temperature sensor capable of preventing a tracking phenomenon and reducing the weight of a power cord.

  The present invention has a neutral side connecting portion for connecting a conductive wire exposed for a predetermined length from a covering body of a covered electric wire at one end, and can be inserted into a rectangular neutral side insertion port provided in an outlet. The line side that has a line side connection part that connects the conductive blade that is exposed for a predetermined length from the sheath of the covered wire and the sheath of the covered electric wire, and that can be inserted into the rectangular line side outlet provided in the outlet A temperature sensor having two plug connecting members that can be connected to a conductive core wire exposed for a predetermined length from the insulator of the signal wire coated with the insulator, the neutral plug blade, and the line plug A power sensor-attached power plug comprising one end side of the blade and a housing that covers the temperature sensor, wherein one of the core wire connectors of the temperature sensor is connected to the core wire. Moni, characterized by connecting the other said neutral side plug pins of the core wire connecting member within said housing.

  The said covering body and the said insulator are members with high insulation which coat | cover a some covered electric wire, and are the concept containing the material etc. which are hard to be damaged by a polyethylene-type resin, a laminate sheath, and thermal stress. In addition, the said covering body and the said insulator are the concept including not only the case where the said covering body and the said insulator are formed with a different member but the case where it is formed with the same member.

The temperature sensor is connected to a thermistor whose resistance value changes according to a change in temperature, a sensor that directly senses the temperature to detect a change in temperature, a temperature sensor that includes the thermistor as a component, and the power plug with the temperature sensor. It is a concept including a temperature sensor having a configuration for measuring a resistance value and a current value flowing through the temperature sensor covered by the housing in the device.
The thermistor includes a PTC thermistor whose resistance value increases as the temperature increases, an NTC thermistor whose resistance value decreases, and a CTR thermistor whose resistance value changes abruptly when a certain temperature is exceeded.

  The core wire and the conductive wire may be a single wire such as a copper wire, a more combined copper wire, a more combined aluminum wire, a more combined metal wire made of an alloy based on copper or aluminum, etc. It is a concept that includes. That is, it may be made of any material as long as it is a member having conductivity, and it is not necessary that the metal wires are combined.

  Furthermore, the core wire and the conductive wire are concepts including cases where the core wires and the conductive wires are formed of metal wires having different diameters, and formed of metal wires of the same diameter. Moreover, the said core wire and the said conducting wire are the concepts including the case where it forms with the metal wire of a different material, the case where it forms with the same metal wire, etc.

Connecting the other side of the core wire connector and the neutral-side plug blade within the housing means that the other core wire connector not connected to the core wire among the core wire connectors provided in the temperature sensor. When connecting a body directly in contact with the neutral plug blade, or connecting one end of a core wire different from the core wire to the other end of the core wire connecting body and connecting the other end of the core wire to the neutral side connecting portion In this case, it is a concept including a case where the core wire connecting portion and the neutral side connecting portion are connected by a conductive member or the like.
The member having conductivity is a concept including all shapes such as a string shape, a belt shape, and a surface shape, as long as it has conductivity.

  According to the present invention, for example, even in the case of the power plug with a temperature sensor corresponding to a two-port outlet, such as a Japanese 100V outlet, the tracking phenomenon is prevented and the weight of the power cord is reduced. Can be reduced in weight.

  More specifically, in the power plug corresponding to the outlet as the neutral side insertion port having two plug insertion ports and grounding one of the plug insertion ports, conventionally, the temperature sensor The two core wire connectors provided were connected to the forward and return signal lines, respectively, and each signal line was connected to an operating device by supplying electricity from the outlet along the electric wire cord.

  However, in the present invention, the neutral-side plug blade that can be inserted into the neutral-side insertion port and the other of the core wire connection bodies of the temperature sensor are connected in the housing, so that electricity is supplied from an outlet. The number of signal lines connecting the device to be supplied and operating and the power plug with temperature sensor can be one for each temperature sensor. Thereby, the number of the signal lines that connect the plug with the temperature sensor and the device can be reduced, and the power cord with the temperature sensor can be reduced in weight.

In addition, since the other side of the core wire connection body is configured to be connected to the neutral side plug blade inserted into the neutral side insertion port, an electrical signal sent from a signal line connected to one of the temperature sensors is transmitted. It is possible to appropriately flow through the neutral side insertion port, and it is possible to prevent the temperature sensor from malfunctioning.
Therefore, it is possible to provide the power plug with the temperature sensor that can reduce the weight of the power cord by preventing the tracking phenomenon and reducing the number of the signal lines.

Further, as an aspect of the present invention, the length in the width direction of the neutral-side plug blade corresponding to the longitudinal direction of the neutral-side insertion port, that is, the blade width of the neutral-side plug blade is set to the length of the line-side insertion port. It can be longer than the length in the direction.
The blade width of the neutral-side plug blade means that the neutral-side plug blade is arranged in the neutral-side insertion port when the power plug is arranged with respect to the outlet so that the neutral-side plug blade can be inserted into the neutral-side insertion port. The length of the neutral plug blade corresponding to the longitudinal direction is indicated.

  Further, to make the blade width of the neutral-side plug blade longer than the length of the line-side insertion port in the longitudinal direction, the neutral-side plug blade in the direction perpendicular to the insertion direction of the neutral-side plug blade. It is a concept including a shape in which at least a part is longer than the length of the line side insertion port in the longitudinal direction.

According to the present invention, malfunction of the temperature sensor can be reliably prevented.
More specifically, the neutral-side plug blade is made longer by making the blade width of the neutral-side plug blade corresponding to the longitudinal direction of the line-side insertion port longer than the length of the line-side insertion port in the longitudinal direction. It cannot be inserted into the line side outlet. Therefore, it is possible to prevent the electrical signal flowing from one side of the core wire connection body provided in the temperature sensor from flowing in the reverse direction by inserting the neutral side plug blade into the line side insertion port, The malfunction of the temperature sensor can be reliably prevented.

As an aspect of the present invention, the temperature sensor can be disposed between the neutral side connection portion and the line side connection portion.
According to the present invention, it is possible to reliably detect a temperature rise between the blades that occurs during the tracking phenomenon, and to improve safety.

  Further, as an aspect of the present invention, a plurality of connection terminals having one end of a conductive wire connecting portion for connecting a conductive wire exposed for a predetermined length from a covering body of a covered electric wire, and the insulator of a signal line covered with an insulator A temperature sensor power supply plug comprising: a temperature sensor having two core wire connecting bodies connectable to a conductive core wire exposed for a predetermined length from a first terminal; and a housing that covers one end side of the connection terminal and the temperature sensor. The connection terminal is formed by a ground pin that can be inserted into the ground side insertion port provided in the outlet, and a polar side plug blade that can be inserted into a plug insertion port other than the ground side insertion port provided in the outlet. And while connecting one side of the said core wire connection body of the said temperature sensor, and the said core wire, the other side of the said core wire connection body and the said earthing pin are connected within the said housing, It is characterized by the above-mentioned.

The connection terminal is a concept including a plug blade such as a pin type or a blade type, or a ground terminal.
The earth side outlet is not only an earth dedicated outlet for grounding but also a cold side outlet that is grounded, such as the above-mentioned Japanese 100V outlet (two outlets). It is a concept that includes.

Connecting the other end of the core wire connector and the ground pin within the housing means that the other core wire connector not connected to the core wire is connected to the ground pin among the core wire connectors provided in the temperature sensor. When connected by direct contact, or when one end of a core wire different from the core wire is connected to the other end of the core wire connector, and the other end of the core wire is connected to the conductor connection portion of the ground pin, the core wire connection portion This is a concept including the case where the conductor connecting portion of the ground pin is connected by a conductive member or the like.
The member having conductivity is a concept including all shapes such as a string shape, a belt shape, and a surface shape, as long as it has conductivity.

According to the present invention, it is possible to provide a power plug capable of preventing the tracking phenomenon and reducing the weight of the power cord.
More specifically, in the conventional power supply plug with temperature sensor, the signal wires of the forward path and the return path are respectively connected to the two core wire connecting bodies provided in the temperature sensor, and each signal line is connected to the outlet along the electric wire cord. It was connected to the equipment which supplies electricity and operates. However, in the present invention, one of the core wire connectors of the temperature sensor is connected to the core wire, and the other is connected to the ground pin in the housing, so that electricity is supplied from an outlet for operation. The number of signal lines connecting the device and the power plug with temperature sensor can be one for each temperature sensor. Thereby, the number of signal lines connecting the device and the power plug can be reduced, and the weight of the power cord composed of the signal line covered with the insulator and the covered electric wire can be reduced. It becomes a power plug.

  In addition, as described above, the other of the core wire connection body provided in the temperature sensor is connected to the grounded ground pin in the same manner as in the conventional configuration, and thus the electric current that has flowed from one of the core wire connection bodies. The signal flows to the ground through the ground pin as usual. For this reason, the temperature sensor does not malfunction.

  Therefore, while preventing the tracking phenomenon, the number of the signal lines along the power cord can be reduced, and the power cord with the temperature sensor that can reduce the weight of the power cord can be obtained.

  According to the present invention, it is possible to provide the power plug with the temperature sensor capable of preventing the tracking phenomenon and reducing the weight of the power cord.

The schematic perspective view of a power plug. The side view of a power plug. AA arrow sectional drawing in FIG. BB arrow sectional drawing in FIG. The schematic perspective view and side view of other Examples of a power plug. The schematic perspective view of the power plug in another Example. CC sectional view taken on the line in FIG. The DD arrow directional cross-sectional view in FIG.

1 is a schematic perspective view showing the external appearance of the power plug 1 from above, FIG. 2 is a side view showing the external appearance of the power plug 1 from the side, and FIG. 4 shows a cross-sectional view taken along the arrow A, FIG. 4 shows a cross-sectional view taken along the line BB in FIG. 2, and FIG. 5 shows a schematic perspective view and a side view showing the appearance of the power plug 1 of another embodiment. .
6 is a schematic perspective view of the power plug 1x, FIG. 7 is a cross-sectional view taken along the line CC of the power plug 1x shown in FIG. 6, and FIG. 8 is a diagram of the power plug 1x shown in FIG. DD sectional view taken on the line is shown.

  1 to 8, the longitudinal direction of the line-side terminal 10 and the neutral-side terminal 20 provided in the power plug 1 is the X-axis direction, and the vertical direction in FIG. 1 is the Z-axis direction. A direction perpendicular to both the X-axis direction and the Z-axis direction is taken as a Y-axis direction. Further, the left front side in FIG. 1 is the front side (+ X direction) or the front side, and the right back side in FIG. 1 is the rear side (−X direction) or the back side. Further, the upper side in FIG. 1 is the upper side (+ Z direction), the lower side is the lower side (−Z direction), the right front side is the left side (+ Y direction), and the left back side is the right side (−Y direction).

Hereinafter, the configuration of the power plug 1 will be described with reference to FIGS.
As shown in FIGS. 1 to 4, the power plug 1 can be inserted into a line-side terminal 10 that can be inserted into a line-side outlet (not shown) of the outlet and a neutral-side outlet (not shown) of the outlet. A housing 30 that includes one end of the neutral side terminal 20, the line side terminal 10, and the neutral side terminal 20, a plug body 40 that surrounds the housing 30, an electric wire cord 50 that extends in the −Z direction from below the plug body 40, and a housing 30. The temperature sensor terminal 60 is configured.

  The power plug 1 of this embodiment is a two-port outlet with two plug insertion ports, one of the plug insertion ports is a neutral side insertion port, and the other is a line side insertion port. A power plug 1 corresponding to a certain outlet.

  Here, the neutral side outlet is an outlet that is grounded inside the outlet, and when the longitudinal direction of the outlet outlet is along the Z-axis direction, it is generally the left side of the outlet outlet. Point to the entrance. On the other hand, the line side outlet of the outlet refers to a plug outlet arranged on the right side. In addition, the neutral side insertion port is slightly longer in the longitudinal direction than the line side insertion port (not shown).

  The line side terminal 10 in which the tip portion (+ X axis side) can be inserted into the line side insertion port is composed of a line side plug blade 11, a line side connection portion 12, a line side plug blade cover 13 and a line side engagement hole 14. (See FIGS. 1 to 3).

  The line-side plug blade 11 is a rectangular plate-shaped plug blade having a bottom surface substantially the same shape as the line-side insertion port of the outlet and having a predetermined length in the X-axis direction. That is, the blade width Wl of the line side plug blade 11 is substantially the same as the length in the longitudinal direction of the line side insertion port of the outlet, and the shape is such that the line side plug blade 11 can be inserted into the line side insertion port of the outlet. ing. Further, the front end portion (+ X-axis direction) protrudes in a substantially mountain shape when viewed from the side (see FIG. 2B).

  The line side connection portion 12 is a cylindrical tube formed at the back side end portion of the line side terminal 10. A non-penetrating hole is formed substantially at the center of the back surface of the line side connection portion 12 to allow insertion of a line side conductor 51a described later. The line side crimping portion 15 is connected to the line side connecting portion 12 by crimping the line side lead wire 51a and the line side terminal 10 at a substantially central portion in the X-axis direction. (See FIG. 3).

The line side plug blade cover 13 is made of a synthetic resin having an insulating property, and is a thin insulating coating that is formed so as to cover the entire circumference of the cross section perpendicular to the X-axis direction of the line side plug blade 11.
As shown in FIG. 1, the line-side engagement hole 14 is a circular through hole formed in the front side portion of the line-side plug blade 11, and when the power plug 1 is inserted into the outlet of the outlet. It is a drop prevention hole for engaging with a metal plate in the outlet so that the power plug 1 does not easily fall out of the outlet.

  As with the line-side terminal 10, the neutral-side terminal 20 can be inserted into the neutral-side insertion port at the tip end (+ X-axis direction). The neutral-side plug blade 21, the neutral-side connection portion 22, and the neutral-side plug blade cover 23 and a neutral-side engagement hole 24.

  The neutral-side plug blade 21 is a rectangular plate-shaped plug blade having a bottom surface substantially the same shape as the neutral-side insertion port of the outlet and having a predetermined length in the X-axis direction. Similarly to the line-side plug blade 11, the front end portion (+ X-axis direction) of the neutral-side plug blade 21 protrudes in a substantially mountain shape when viewed from the side (see FIG. 2).

  Furthermore, the blade width Wn of the neutral plug blade 21 is formed to be longer than the length of the line side insertion port in the longitudinal direction. That is, the blade width Wn of the neutral plug blade 21 is longer than the blade width Wl of the line plug blade 11 (see FIG. 2).

  The neutral side connecting portion 22 is a cylindrical tube formed at the rear side end portion of the neutral side terminal 20, similarly to the line side connecting portion 12, and a non-penetrating hole is formed at the substantially rear center. Therefore, insertion of a line side conductor 52a and a grounding signal core wire 54a, which will be described later, is allowed. Further, a neutral-side crimping portion 25 that crimps and connects a neutral-side conductor 52a and a grounding signal core wire 54a inserted through the neutral-side connecting portion 22 to the neutral-side terminal 20 at a substantially central portion in the X-axis direction of the neutral-side connecting portion 22. (See FIG. 3).

The neutral-side plug blade cover 23 is made of a synthetic resin having an insulating property, and is a thin insulating coating that is formed so as to cover the entire circumference of the cross-section orthogonal to the X-axis direction of the neutral-side plug blade 21.
As shown in FIG. 1, the neutral-side engagement hole 24 is a circular through-hole formed in the front side portion of the neutral-side plug blade 21, and when the power plug 1 is inserted into the outlet of the outlet. It is a drop prevention hole for engaging with a metal plate in the outlet so that the power plug 1 does not easily fall out of the outlet.

  The housing 30 is a housing formed by overlapping a housing 30a (not shown) constituting the front portion and a housing 30b (not shown) constituting the back portion in the X-axis direction, as shown in FIG. In addition, the housing 30 has an internal space S for containing a distal end side of an electric wire cord 50 described later. The front portion of the housing 30 has a line-side terminal insertion hole 31 that allows insertion of the line-side terminal 10 in the X-axis direction, a neutral-side terminal insertion hole 32 that allows insertion of the neutral-side terminal 20 in the X-axis direction, and will be described later. A temperature sensor terminal insertion hole 33 that allows insertion of the temperature sensor terminal 60 to be inserted is provided, and a power cord outlet 35 is provided at the lower portion of the housing 30.

  The line side terminal insertion hole 31 is a protrusion formed so as to protrude from the −X axis direction to the + X axis direction on the front right side of the housing 30 (housing 30a), and the back side is a cylindrical tube, The front side is formed of a hollow quadrangular prism.

  An insertion opening that is slightly larger than the line side connection portion 12 that is the rear end portion of the line side terminal 10 is formed on the back surface of the line side terminal insertion hole 31, that is, on the back surface of the cylindrical tube body. In addition, an insertion port having a size substantially the same as the outer diameter of the line-side plug blade cover 13 is formed on the back surface of the quadrangular column that is the front portion of the line-side terminal insertion hole 31, so that the insertion of the line-side plug blade cover 13 can be performed. It is possible.

  Further, the front end face of the line side terminal insertion hole 31 is provided with a through hole having a size substantially the same as the outer shape of the bottom surface of the line side plug blade 11 when the line side terminal 10 is viewed from the front. 11 can penetrate in the + X-axis direction.

  The neutral-side terminal insertion hole 32 is a protrusion formed so as to protrude from the −X-axis direction to the + X-axis direction on the left side of the front surface of the housing 30 (housing 30a), like the line-side terminal insertion hole 31. The side is a cylindrical cylinder, and the front side is formed of a hollow quadrangular prism.

  An insertion opening that is slightly larger than the neutral-side connection portion 22 that is the rear end portion of the neutral-side terminal 20 is formed on the back surface of the neutral-side terminal insertion hole 32, that is, on the back surface of the cylindrical tube body. In addition, an insertion port having the same size as the outer diameter of the neutral-side plug blade cover 23 is formed on the back surface of the quadrangular column, which is the front portion of the neutral-side terminal insertion hole 32, and the neutral-side plug blade cover 23 can be inserted. It has become.

Further, the front end face of the neutral side terminal insertion hole 32 is provided with a through hole having substantially the same size as the outer shape of the bottom surface of the neutral side plug blade 21 when the neutral side terminal 20 is viewed from the front. 21 can penetrate in the + X-axis direction.
In addition, the shape of the line side terminal insertion hole 31 and the neutral side terminal insertion hole 32 is not limited to the shape of a present Example, It changes suitably according to the shape of the line side terminal 10 and the neutral side terminal 20. FIG.

  The temperature sensor terminal insertion hole 33 is a hollow cylindrical portion that protrudes forward from the front surface of the housing 30, and is formed between the line side terminal insertion hole 31 and the neutral side terminal insertion hole 32. Further, the temperature sensor terminal insertion hole 33 forms a thermistor insertion hole 34 inside a non-through hole extending forward, and the temperature sensor terminal insertion hole 33 is connected to a signal line 53 to be described later. The insertion of the connected temperature sensor terminal 60 is allowed.

  The power cord outlet 35 is an opening having substantially the same shape as the outer shape of the electric wire cord 50 described later, and is formed below the housing 30. The housing 30a is formed with a front half of the power cord outlet 35, and the housing 30b is formed with a rear half of the power cord outlet 35. By combining the housing 30a and the housing 30b, the power cord outlet is formed. 35 is formed (not shown).

  As shown in FIG. 1, the plug body 40 is a synthetic resin that covers the entire housing 30 and a range extending to a predetermined location on the other end side (the −Z-axis direction) of the electric wire cord 50 and is made of polyvinyl chloride. doing. The synthetic resin only needs to have insulating properties, and is not limited to polyvinyl chloride, and may be formed of other materials.

  As shown in FIGS. 1 and 4, the electric wire cord 50 is an electric wire in which a line-side electric wire 51, a neutral-side electric wire 52, and a signal wire 53 that are covered with an insulating coating 55 made of an insulator are integrally formed. It is a cord, and a groove is formed on the outer peripheral surface of the electric wire cord 50 at the boundary portion so that the line side electric wire 51, the neutral side electric wire 52, and the signal line 53 can be separated.

  As shown in FIG. 4, the line-side electric wire 51 and the neutral-side electric wire 52 are formed by combining the conductive copper wire and the line-side conductive wire 51 a and the neutral-side conductive wire 52 a that are insulative. 55 is a covered electric wire covered with 55. In addition, in a present Example, although the line side conducting wire 51a and the neutral side conducting wire 52a are formed by match | combining a copper wire more, it is not necessarily limited to a copper wire, What is necessary if it has electroconductivity? For example, a copper alloy wire, an aluminum wire, a glass fiber, or the like may be used.

The signal line 53 is a signal line in which a signal core wire 53a formed by twisting a copper wire is covered with an insulating coating 55 having an insulating property, like the line-side conductor 51a. It is sandwiched between the electric wire 51 and the neutral-side electric wire 52 (see FIG. 4). The line-side electric wire 51 is disposed on the right side of the signal line 53, and the neutral-side electric wire 52 is disposed on the left side of the signal line 53. That is, the line-side electric wire 51, the neutral-side electric wire 52, and the signal line 53 are arranged side by side along the Y-axis direction.
Further, the signal core wire 53a is formed by combining copper wires and has a diameter smaller than that of the line side conducting wire 51a and the neutral side conducting wire 52a, but is not limited to this embodiment.

  The ground signal line 54 is a lead wire in which a ground signal core wire 54a formed by twisting a copper wire so as to have the same diameter as the signal line 53 is covered with an insulating film 55, and a temperature sensor terminal 60 described later. Is a signal line that plays a role of flowing an electric signal flowing through the temperature sensor terminal 60 to the neutral side by connecting the device-side connection body 63 and the neutral-side terminal insertion hole 32.

The temperature sensor terminal 60 is a temperature sensor for detecting a temperature change in the front direction of the power plug 1, and includes a terminal support 61, a thermistor terminal 62, a device side connection body 63, and a neutral side connection body 64. .
The terminal support 61 is a cylindrical tubular body having an outer diameter larger than the outer diameter of the thermistor insertion hole 34 and having an insertion hole that allows the thermistor terminal 62 to be inserted.

  The thermistor terminal 62 is a thermistor terminal for detecting the temperature inserted in the insertion hole provided in the terminal support 61, and the front portion is protected by the terminal protection cover 65.

The device-side connection body 63 and the neutral-side connection body 64 are conductor connection portions protruding in the −X-axis direction from the back surface of the thermistor terminal 62, and as shown in FIG. 3, the signal core wire 53a and the ground signal core wire 54a This is a conductive wire formed so as to be connected.
The device-side connection body 63 protrudes rearward from the back right side of the thermistor terminal 62, and the neutral-side connection body 64 protrudes rearward from the back left side of the thermistor terminal 62.

Next, a method for manufacturing the power plug 1 will be briefly described.
First, one end of the wire cord 50 in which the line-side electric wire 51, the neutral-side electric wire 52, and the signal line 53 are integrally formed is extended along the groove formed in the outer peripheral surface of the electric wire cord 50. Separated into a side electric wire 52 and a signal line 53.

  Next, the signal core wire 53 a is exposed by peeling off the insulating film 55 covering the signal core wire 53 a and is joined to the device-side connector 63 provided in the temperature sensor terminal 60. Further, one end of the ground signal core wire 54a exposed by peeling off the insulating coating 55 of the ground signal wire 54 is joined to the neutral-side connector 64 provided in the temperature sensor terminal 60, and the other end of the ground signal core wire 54a. Is inserted into the neutral side connecting portion 22.

  Similarly, the insulating film 55 of the line side electric wire 51 is peeled to expose the line side conducting wire 51a, the line side conducting wire 51a is inserted into the line side connecting portion 12 of the line side terminal 10, and the line side crimping portion 15 is crimped. The neutral side lead wire 52a, which is exposed by peeling off the insulator coating 55 of the neutral side electric wire 52, is inserted into the neutral side connection portion 22, and the neutral side crimping portion 25 is crimped, thereby the neutral side terminal 20 is neutralized. The side electric wire 52 and the ground signal line 54 are joined.

  Thus, the line side terminal 10 and the line side electric wire 51 are formed by making the line side connection part 12 and the neutral side connection part 22 into a hollow cylindrical body, inserting the line side conducting wire 51a and the like into the internal space, and crimping the connection. The neutral side terminal 20, the neutral side electric wire 52, and the grounding signal line 54 can be reliably connected.

  Next, the temperature sensor terminal 60 joined to the signal line 53 and the ground signal line 54 is inserted into the thermistor insertion hole 34 formed on the back surface of the temperature sensor terminal insertion hole 33. Similarly, the line side plug blade 11 which is one end side of the line side terminal 10 to which the line side conductor 51a is connected and the neutral side plug blade 21 which is one end side of the neutral side terminal 20 to which the neutral side conductor 52a is connected are respectively connected to the line side. It passes through the terminal insertion hole 31 and the neutral side terminal insertion hole 32.

At this time, since the outer shapes of the line-side plug blade cover 13 and the neutral-side plug blade cover 23 are larger than the through holes formed in the front side of the line-side terminal insertion hole 31 and the neutral-side terminal insertion hole 32, the line-side terminal The forward movement of the terminal 10 and the neutral side terminal 20 is restricted.

  Next, the wire cord 50 which is the other end side of the line-side wire 51 joined to the line-side terminal 10 is pulled downward and attached to the front portion of the power cord outlet 35 formed in the housing 30a, and the housing 30b is attached to the housing 30a. On the other hand, the electric wire cord 50 is pulled out from the power cord outlet 35 of the housing 30 by being assembled from the −X axis direction. At this time, the line-side electric wire 51, the neutral-side electric wire 52, one end portion of the signal line 53, and the grounding signal line 54 are accommodated in the accommodating space S of the housing 30 (see FIG. 3).

In this way, the line side terminal 10, the neutral side terminal 20, and the temperature sensor terminal 60 are assembled to the housing 30, and the wire cord 50 joined to the line side terminal 10, the neutral side terminal 20, and the temperature sensor terminal 60 is connected to the housing 30. By pulling out from below, it is possible to enclose the line side terminal 10 and the one end side of the neutral side terminal 20 connected to the line side conductor 51a exposed from the line side electric wire 51 and the like, and the temperature sensor terminal 60 in the housing 30. A state in which the line-side plug blade 11 that is the tip portion of the line-side terminal 10 and the neutral-side plug blade 21 that is the tip portion of the neutral-side terminal 20 protrude from the front of the housing 30 toward the front (+ X-axis direction). Become.
In such a state, the power plug 1 can be configured by covering the range from the top of the housing 30 to a predetermined portion of the wire cord 50 by injection molding to form the plug body 40 made of synthetic resin (FIG. 1). reference).

  As described above, the line-side connecting portion 12 that connects the conductive line-side conductive wire 51a exposed from the insulator coating 55 of the line-side electric wire 51 to a predetermined length is provided at one end, and the rectangular line-side difference provided in the outlet is provided. The line-side terminal 10 that can be inserted into the inlet and the neutral-side connecting portion 22 that connects the conductive neutral-side conductor 52a exposed for a predetermined length from the insulating coating 55 of the neutral-side electric wire 52 at one end, A neutral-side terminal 20 that can be inserted into a rectangular-shaped neutral-side insertion port, and a conductive signal core wire 53a that is exposed for a predetermined length from the insulating film 55 of the signal line 53 that is covered with the insulating film 55. A temperature sensor terminal 60 having a connectable device-side connector 63 and a neutral-side connector 64, a line-side terminal 10, and a neutral In the power plug 1 including the one end side of the side terminal 20 and the housing 30 covering the temperature sensor terminal 60, the device side connection body 63 of the temperature sensor terminal 60 is connected to the signal core wire 53a, and the neutral side connection body 64 and neutral. By connecting the side terminal 20 in the housing 30, for example, a power plug 1 corresponding to an outlet having two plug outlets such as a Japanese 100 V outlet can be prevented from tracking phenomenon, and an electric wire cord The power plug 1 can reduce the weight of 50.

  More specifically, in the power plug 1 corresponding to a two-port outlet in which one of the plug outlets of the outlet having two plug outlets is grounded to the neutral side outlet, the neutral side outlet By connecting the neutral side terminal 20 that can be inserted and the other of the device side connection body 63 and the neutral side connection body 64 of the temperature sensor terminal 60, the number of signal lines 53 connecting the power plug 1 and the device is reduced. Thus, the power cord 1 in which the weight of the electric wire cord 50 is reduced can be obtained.

Moreover, since the neutral side connection body 64 is configured to be connected to the neutral side terminal 20 to be inserted into the neutral side insertion port of the outlet via the grounding signal core wire 54, the device side connection which is one of the temperature sensor terminals 60 is provided. Since the electric signal sent from the signal line 53 connected to the body 63 can be appropriately flowed to the neutral side insertion port of the outlet, it is possible to prevent the temperature sensor terminal 60 from malfunctioning.
Therefore, the power supply plug 1 in which the weight of the electric wire cord 50 is reduced can be obtained by preventing the tracking phenomenon and reducing the number of signal lines 53 connecting the device and the plug.

  Further, by making the blade width Wn of the neutral side terminal 20 corresponding to the longitudinal direction of the neutral side insertion port longer than the length of the line side insertion port in the longitudinal direction, the malfunction of the temperature sensor terminal 60 is ensured. Can be prevented.

  More specifically, the neutral side terminal 20 is connected to the line side by making the blade width Wn of the neutral side terminal 20 corresponding to the longitudinal direction of the line side insertion port longer than the longitudinal length of the line side insertion port of the outlet. It cannot be inserted into the slot.

  Therefore, the neutral-side terminal 20 can be reliably inserted only into the neutral-side outlet of the outlet, and an electric signal that flows from one of the device-side connector 63 and the neutral-side connector 64 provided in the temperature sensor terminal 60 to the other. However, the neutral side terminal 20 can be prevented from flowing in the reverse direction by inserting it into the line side insertion port, and the malfunction of the temperature sensor terminal 60 can be reliably prevented.

  Furthermore, by arranging the temperature sensor terminal 60 between the neutral side connection portion 22 and the line side connection portion 12, a temperature change between the line side terminal 10 and the neutral side terminal 20 that occurs during the tracking phenomenon. Can be reliably detected by the temperature sensor terminal 60, and safety can be further improved.

In correspondence between the configuration of the present invention and the above-described embodiment,
The neutral side plug blade corresponds to the line side terminal 10,
The neutral side connection part corresponds to the line side connection part 12,
The line side blade corresponds to the neutral side terminal 20,
The line side connection part corresponds to the neutral side connection part 22,
The covered electric wires correspond to the line side electric wires 51 and the neutral side electric wires 52,
The conducting wire corresponds to the line side conducting wire 51a and the neutral side conducting wire 52a,
The covering and the insulator correspond to the insulator coating 55,
The core wire corresponds to the signal core wire 53a,
The temperature sensor corresponds to the temperature sensor terminal 60,
The core wire connection body corresponds to the device side connection body 63 and the neutral side connection body 64,
Although the power plug with temperature sensor corresponds to the power plug 1, the present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, in the present embodiment, the line side connection portion 12 and the neutral side connection portion 22 are hollow cylindrical bodies, but are not limited to the above shapes, and for example, the line side terminal 10 and the neutral side terminal 20. An insertion hole that allows a screw to pass through may be formed in the Y-axis direction at the rear end portion of the screw, and a helical groove may be formed on the surface of the through hole.

  As a result, a screw (not shown) and the line-side terminal 10 can be screwed together, the line-side conducting wire 51a exposed from the tip end portion of the line-side electric wire 51 is wound around the screw, and the screw is screwed onto the insulator coating 55 so that the line The side terminal 10 and the line side electric wire 51 can be connected.

  Also in this case, the through-hole formed in the rear end portion of the line-side terminal 10 does not necessarily have to be formed in the Y-axis direction, and in any direction as long as it can be connected to the line-side conductor 51a. It may be a non-penetrating hole.

  Further, in this embodiment, the line-side electric wire 51 and the line-side terminal are inserted by inserting the line-side conducting wire 51 a into the line-side connecting portion 12 provided at the rear end portion of the line-side terminal 10 and crimping the line-side crimping portion 15. However, for example, by providing a through hole in the line side connection portion 12 as described above, the wire cord 50 and the line side terminal 10 may be connected using screws. The line-side electric wire 51 may be welded and fixed to the line-side connecting portion 12 by soldering or the like. Thereby, the line side conductor 51a etc. and the line side terminal 10 etc. can be connected more reliably.

  Further, in the present embodiment, the power plug 1 has a shape in which the electric wire cord 50 extends along the −Z axis direction, but the power cord 50 may extend in the −X axis direction. As in this embodiment, by extending the power cord 50 along the −Z-axis direction, for example, even if there are two sets of plug outlets of the outlet, the power plug 1 is placed on the upper side. By inserting, it can block | prevent that another power plug is inserted in a lower plug insertion port.

  At this time, when the line side terminal 10 and the neutral side terminal 12 are arranged at a position where the line side terminal 10 and the neutral side terminal 12 can be inserted into the upper outlet of the outlet, they are below the line side terminal 10 and the neutral side terminal 12 provided in the power plug 1. It is good also as a shape provided with the plug blade used as a dummy in the position corresponding to the downward insertion port of the said outlet socket. By adopting such a configuration, it is possible to prevent another power plug from being inserted into the outlet and to prevent the outlet from being pulled out more.

  Here, in the present embodiment, the blade width Wn of the neutral plug blade 21 is formed so as to be longer than the length of the outlet side plug insertion port in the longitudinal direction. The width Wn only needs to be longer than the length of the outlet side line insertion port in the longitudinal direction. For example, as shown in FIG. 5, the length of the line side terminal 10 in the Z-axis direction is approximately equal to the height of the line side insertion port. A part of the neutral-side plug blade 21 blade width Wn may be made larger than the blade width Wl of the line-side terminal 10.

  In the present embodiment, the wire cord 50 is configured so that the line-side electric wire 51, the neutral-side electric wire 52, and the signal line 53 are arranged side by side along the Y-axis direction, but the shape is limited to this. Instead, the line-side electric wire 51, the neutral-side electric wire 52, and the signal line 53 may be combined together. In this case, the signal line 53 preferably has a shape sandwiched between the line-side electric wire 51 and the neutral-side electric wire 52. This is because the influence of the electric field generated by the current flowing through the line-side electric wire 51 and the neutral-side electric wire 52 can be reduced as much as possible.

  Further, in the above embodiment, a two-port outlet with two plug insertion ports, one of the plug insertion ports is a neutral side insertion port, and the other is a line side through which electricity flows. Although it is a power plug corresponding to a two-port outlet that is an insertion port, a power plug corresponding to a three-port outlet equipped with a grounding electrode may be used.

Hereinafter, the grounded power plug 1x corresponding to the three-port outlet will be described with reference to FIGS.
However, among the configurations of the grounded power plug 1x described below, the same configurations as those of the power plug 1 in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

  Here, the three-port outlet is an outlet having three plug insertion ports into which terminals can be inserted. The plug insertion port is a line side insertion port through which electricity flows and a neutral side insertion port through which electricity flows. And a grounding socket serving as a grounding electrode. In addition, when arrange | positioning so that the longitudinal direction of a line side insertion port may become a vertical direction, generally an earth insertion port is located below the line side insertion port and a neutral side insertion port.

  As shown in FIGS. 6 and 7, the grounded power plug 1x includes a line side terminal 10, a neutral side terminal 20x, a housing 30, a plug body 40, a three-outlet power cable 50x, a temperature sensor terminal 60, and a grounding terminal 70. It consists of and.

  The line-side terminal 10 is a plug blade that can be inserted into the line-side insertion port located at the upper right side of the three-port outlet when the three-port outlet is arranged so that the ground pin insertion port is positioned below.

  The neutral side terminal 20x is a terminal to be inserted into the neutral side insertion port located on the upper left side of the three-port outlet, and includes a cold plug blade 21x, a cold connection portion 22x, a cold plug blade cover 23x, and a neutral side engagement. It is formed by a hole 24x. The cold plug blade 21x, the cold connection portion 22x, the cold plug blade cover 23x, and the neutral side engagement hole 24x, which are the configuration of the neutral side terminal 20x, are respectively the neutral plug blade 21 and the neutral side connection portion 22 described above. Since the configuration is the same as that of the neutral-side plug blade cover 23 and the neutral-side engagement hole 24, description thereof is omitted.

  In addition to the configuration of the housing 30 of the wire plug 1, the housing 30 is formed with a ground pin insertion hole 37 protruding in the front direction. The earth pin insertion hole 37 has an insertion hole on the back side that is slightly larger than the outer diameter of the three-port ground pin 71, and has a through hole having a diameter substantially equal to the outer diameter of the three-port ground pin 71 on the front side. .

  As shown in FIG. 8, the three-outlet electric wire cord 50 x is composed of a line-side electric wire 51, a neutral-side electric wire 52 x, a grounding electric wire 56, and a signal wire 53 that are covered with an insulating film 55 made of an insulating material. The line-side electric wire 51, the neutral-side electric wire 52x, and the grounding electric wire 56 are arranged so as to surround the signal line 53, and the whole is covered with an insulator.

Further, as shown in FIG. 8, a groove is formed in the boundary portion so that the line-side electric wire 51, the neutral-side electric wire 52x, and the grounding electric wire 56 can be separated on the outer peripheral surface of the three-outlet electric wire cord 50x. The signal line 53 is also formed so as to be separable from the line side electric wire 51 and the like (not shown).
In addition, the neutral side electric wire 52x coat | covers the neutral side conducting wire 52xa with the insulator coating | cover 55, and has the structure similar to the neutral side electric wire 52. FIG.

  As shown in FIG. 8, the grounding wire 56 is located on the front side (+ X-axis direction side) of the three-way outlet wire cord 50x, and, like the line-side wire 51 and the neutral-side wire 52x, more closely matches the copper wire. This is a covered electric wire in which the grounding electric wire 56a is covered with an insulating film 55.

The ground terminal 70 is a pin-type terminal having a circular shape in plan view that can be inserted into the ground pin insertion port of the three-port outlet, and includes a three-port ground pin 71, a ground pin connection portion 72, and a ground pin cover 73.
The three-port ground pin 71 is a cylindrical pin-type terminal main body portion having a bottom surface substantially the same shape as the ground pin insertion port of the three-port outlet and having a predetermined length in the X-axis direction.

The earth pin connection portion 72 is a cylindrical tube formed at the rear side end portion of the ground terminal 70, and the non-penetration allowing the insertion of the ground signal core wire 54 a and the ground wire 56 a at the center of the back surface. The hole is formed. Further, a ground signal core wire 54 a and a ground wire 56 a inserted through a hole formed in the back surface of the ground pin connection portion 72 are crimped and connected to the ground terminal 70 at a substantially central portion in the X-axis direction of the ground pin connection portion 72. It has a crimping part 75 for grounding (see FIG. 7).
The earth spin cover 73 is made of a synthetic resin having an insulating property, and is a thin insulating coating that is formed so as to cover the entire circumference of the cross section orthogonal to the X-axis direction of the three-port ground pin 71.

  The line-side wire 51a, the neutral-side wire 52xa, and the ground, which are conductive wires exposed for a predetermined length from the insulating coating 55 of the line-side wire 51, the neutral-side wire 52x, and the grounding wire 56, configured as described above. The line side connection portion 12 for connecting the electric wire 56a, the cold connection portion 22x, and the line side terminal 10 having the ground pin connection portion 72 at one end, the neutral side terminal 20x, the grounding terminal 70, and the insulator coating 55 are covered. Connection of two core wires, that is, a device-side connection body 63 that can be connected to the conductive core wire 53a exposed for a predetermined length from the insulating coating 55 of the signal line 53, and a neutral-side connection body 64 that can be connected to the neutral-side core wire 54a. A temperature sensor terminal 60 having a body, one end side of the line side terminal 10, the neutral side terminal 20x, and the ground terminal 70; A grounded power plug 1x having a housing 30 covering the degree sensor terminal 60, and the line side terminal 10, the neutral side terminal 20x, and the grounding terminal 70 can be inserted into a neutral side insertion port provided in the outlet. A ground terminal 70 and a line side terminal 10 and a neutral side terminal 20x that can be inserted into a plug insertion port other than the neutral side insertion port provided in the outlet, and a device side connection 63 of the temperature sensor terminal 60, Connecting the core wire 53a and connecting the neutral-side connector 64 and the grounding terminal 70 in the housing 30 prevents the tracking phenomenon and reduces the weight of the three-outlet wire cord 50x. It can be a plug 1x.

  More specifically, the signal line 53 of the forward path and the return path is connected to the two device side connection bodies 63 and the neutral side connection body 64 provided in the temperature sensor terminal 60, respectively, and each signal line 53 is a three-way outlet wire. Electricity was supplied from the outlet along the cord 50x, and connected to the operating equipment. However, in the present invention, the device-side connection body 63 of the temperature sensor terminal 60 is connected to the core wire 53a, and the neutral-side connection body 64 is connected to the grounding terminal 70 in the housing 30. The number of the signal lines 53 that connect the device that supplies and operates the grounded power plug 1x can be one for each temperature sensor terminal 60. As a result, the number of signal lines 53 that connect the device and the grounded power plug 1x can be reduced, and the signal lines 53, the line-side electric wires 51, the neutral-side electric wires 52, and the grounding wires that are covered with the insulator coating 55 can be reduced. The weight of the three-outlet electric wire cord 50x consisting of 56 can be reduced.

  Further, since the neutral side connection body 64 provided in the temperature sensor terminal 60 is connected to the grounded ground terminal 70 as in the conventional configuration, the electrical signal flowing from the device side connection body 63 is the same as before. It will flow through the grounding terminal 70 to the ground. For this reason, the temperature sensor terminal 60 does not malfunction.

  Therefore, it is possible to obtain a grounded power plug 1x that can prevent the tracking phenomenon and reduce the weight of the three-outlet wire cord 50x by reducing the number of signal lines 53.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The covered electric wires correspond to the line side electric wires 51, the neutral side electric wires 52x, and the grounding electric wires 56,
The conducting wire corresponds to the line side conducting wire 51a, the neutral side electric wire 52xa, and the grounding electric wire 56a,
The conducting wire connecting portion corresponds to the line side connecting portion 12, the cold connecting portion 22x, and the ground pin connecting portion 72,
The connection terminals correspond to the line side terminal 10, the neutral side terminal 20x, and the ground terminal 70,
Earthpin corresponds to the grounding terminal 70,
Polar side blades correspond to the line side terminal 10 and the neutral side terminal 20x,
The power plug with the temperature sensor corresponds to the grounded power plug 1x, but the present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1 Power supply plug with temperature sensor 12 Conductor connection part or neutral side connection part 10 Neutral side plug blade or polar side plug blade 22 Conductor connection part or line side connection part 23 Line side plug blade or polar side plug blade 30 Housings 51, 52 and 56 covered wires 51a, 52a, 52xa and 56a conducting wire 53 signal wire 53a core wire 55 covering body and insulator 60 temperature sensor 63 and 64 core wire connecting body 70 earth spin

Claims (6)

A neutral-side plug blade that has a neutral-side connection portion that connects a conductive conductor exposed for a predetermined length from a covering body of the covered electric wire at one end, and that can be inserted into a rectangular-shaped neutral-side insertion port provided in an outlet,
A line-side plug blade that can be inserted into a rectangular line-side insertion port provided in the outlet, having a line-side connection portion that connects a conductive wire exposed for a predetermined length from the covering body of the covered electric wire at one end,
A temperature sensor having two core wire connecting bodies for connecting a conductive core wire exposed for a predetermined length from the insulator of the signal wire coated with an insulator;
A temperature sensor power plug comprising: a neutral plug blade and one end side of the line side plug blade and a housing covering the temperature sensor;
A power plug in which one of the core wire connectors of the temperature sensor is connected to the core wire, and the other of the core wire connectors and the neutral plug blade are connected in the housing. The length of the neutral side plug blade corresponding to the longitudinal direction of the neutral side insertion port,
The power plug according to claim 1, wherein the power plug is longer than a length in a longitudinal direction of the line side insertion port. The temperature sensor;
The power plug according to claim 1, wherein the power plug is disposed between the neutral side connection portion and the line side connection portion. A plurality of connection terminals having at one end a conductive wire connecting portion to be connected to a conductive conductive wire exposed for a predetermined length from the covering of the covered electric wire;
A temperature sensor having two core wire connectors connectable to a conductive core wire exposed for a predetermined length from the insulator of the signal wire coated with an insulator; and
A power sensor-attached power plug comprising a housing that covers one end side of the connection terminal and the temperature sensor,
The connection terminal;
Formed with a ground pin that can be inserted into the neutral side insertion port provided in the outlet, and a polar side plug blade that can be inserted into a plug insertion port other than the neutral side insertion port provided in the outlet,
A power plug in which one of the core wire connectors of the temperature sensor is connected to the core wire, and the other of the core wire connectors is connected to the ground pin in the housing. The power plug according to claim 1, wherein:
A power supply characterized in that the power cord constituted by the covered electric wire connected to the neutral side plug blade and the line side plug blade and the signal line connected to one of the temperature sensors is drawn out from the housing. Power cord with plug. The power plug according to claim 4,
A power cord with a power plug, wherein the power cord comprising the covered electric wire connected to the connection terminal and the signal line connected to one of the temperature sensors is pulled out from the housing.

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