JP2005135615A - Plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plug with a high voltage and a high capacity in which a plug housing can be made smaller in size than a conventional configuration. <P>SOLUTION: In a plug housing 60, blades 71 to 73 of three poles including an earth electrode are provided protruding on one face. The blades 71 and 72 serving as voltage electrodes have rectangular-shaped sections, respectively, and longitudinal sections are orthogonal to each other. The blade 72 is spaced from the blade 71 widthwise of the section of the blade 71. Also, the blade 73 serving as the earth electrode is spaced from the blade 72 in the widthwise direction of the section of the blade 72, and is situated in the corresponding area between one end apart from the blade 71, out of the both ends of the blade 72 in the longitudinal direction and the blade 71. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a high voltage and high capacity plug such as for 250V30A.

  In recent years, electric appliances having a power supply voltage of 200V have become widespread in ordinary households. In particular, the increase in the penetration rate of IH cooking heaters is remarkable, and this type of electrical equipment requires a plug with a rating of 250V30A.

As shown in FIG. 13, the high-voltage and high-capacity outlet has a three-pole configuration including a grounding pole, and the plug blade of the plug corresponding to the two poles that are voltage poles is a flat plug blade. The plug openings 2 a and 2 b into which the plug blades are inserted are provided on one surface of the outlet housing 1 so as to open in a rectangular shape. The two insertion holes 2a and 2b, which are voltage electrodes, are arranged side by side so that the center lines in the longitudinal direction coincide with each other, and the insertion hole 2c which is a grounding electrode has a width of the insertion holes 2a and 2b which are voltage electrodes. It arrange | positions so that it may respond | correspond to the center position between the edge parts which mutually separated in the longitudinal direction of the both insertion ports 2a and 2b which are spaced apart in the direction, and are voltage poles.
JP 2002-352895 A

  By the way, in the outlet described above, the rectangular insertion ports 2a and 2b, which are voltage poles, are arranged side by side so that the center lines in the longitudinal direction coincide with each other, and therefore the longitudinal direction of the insertion ports 2a and 2b. The outlet housing 1 has a dimension that is at least twice as long as the longitudinal direction of the insertion ports 2a, 2b. That is, there is a problem that the high voltage and high capacity outlet and the plug are relatively large.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a high-voltage and high-capacity plug in which the plug housing can be made smaller than the conventional configuration.

  The invention according to claim 1 is a plug in which a three-pole plug blade including a ground electrode is provided on one surface of the plug housing, and each of the first and second plug blades which are voltage electrodes has a rectangular cross section. The longitudinal directions of the cross sections are orthogonal to each other and the second plug blade is separated from the first plug blade in the width direction of the cross section of the first plug blade. One end of the second plug blade that is separated from the first plug blade in the longitudinal direction of the cross section of the second plug blade and the first plug blade that is spaced from the first plug blade in the longitudinal direction of the cross section of the second plug blade It is located in the site | part corresponding to between.

  According to this configuration, the longitudinal direction of the cross section of the second plug blade is compared with the conventional configuration in which the first plug blade and the second plug blade, which are voltage electrodes, are arranged side by side on a straight line in the longitudinal direction of the cross section. The size occupied by the first and second plug blades can be reduced, and a plug housing having a smaller width than the conventional configuration can be used.

  According to a second aspect of the present invention, in the first aspect of the invention, the cross section perpendicular to the protruding direction of the plug blade in the plug housing is all in the outlet housing having three insertion ports into which the plug blades are respectively inserted. It is formed in the shape corresponding to the insertion recess formed in the site | part containing this insertion port, The one end part which becomes the plug blade side in a plug housing can be fitted to an insertion recess.

  According to this configuration, when the plug is inserted into the outlet, one end of the plug housing is fitted into the insertion recess provided in the outlet housing, so that the opening surface of the insertion recess provided in the outlet housing is formed by the plug housing. In addition to being blocked, the part where the plug blade protrudes in the plug is deeper than the opening of the insertion recess, making it difficult for foreign objects such as dust, metal pieces, and water droplets to touch the plug blade. Can be improved. This configuration is particularly effective when used in a place where foreign matter is relatively likely to adhere, such as an IH cooking heater. Moreover, since the plug housing has a cross-sectional shape that matches the opening surface of the insertion recess provided in the outlet housing, the projected area of the plug housing with respect to the outlet housing is reduced, and the plug is reduced in size.

  A third aspect of the present invention is the invention according to the first aspect, wherein a portion including all the insertion openings of the one surface provided with the insertion openings in the outlet housing having three insertion openings into which the plug blades are respectively inserted. One of the insertion recess and the insertion stand that can be fitted to each other is formed, and the plug housing includes a plug recess and a plug in a portion including all the plug blades on one surface of the plug housing. The other is characterized in that the other side of the projecting base is formed.

  According to this configuration, when the plug is inserted into the outlet, the insertion protrusion and the insertion recess are fitted, so that the surface of the plug from which the plug blade protrudes is different from the surface where the plug and the outlet are abutted. As a result, foreign matters such as dust, metal pieces and water droplets are less likely to touch the blade, and safety can be improved. This configuration is particularly effective when used in a place where foreign matter is relatively likely to adhere, such as an IH cooking heater.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, a pull-out recess is formed on a surface intersecting with one surface of the plug blade protruding from the outer surface of the plug housing provided with the plug blade. A hanging step portion for hooking a finger is formed in a portion far from the surface from which the plug blade protrudes.

  According to this configuration, when the plug is pulled out from the outlet, the finger is hooked on the stepped portion, so that the operation of pulling out the outlet becomes easy, and the force from the finger can be transmitted to the plug housing by the hooked stepped portion. The thickness dimension of the plug housing in the protruding direction of the plug blade can be reduced.

  According to a fifth aspect of the present invention, in the third aspect of the invention, a partition stepped portion for preventing a finger from contacting the plug blade is formed in a portion near the surface from which the plug blade protrudes in the pull-out recess. It is characterized by being.

  According to this configuration, the presence of the partition step between the finger applied to the pull-out recess and the plug blade prevents the finger from contacting the plug blade, and allows the plug to be removed from the outlet. Safety can be increased.

  According to a sixth aspect of the present invention, in the first to fifth aspects of the invention, the electric wire is caulked and joined to a caulking portion provided on the plug blade, and the plug housing is formed integrally with the plug blade. It is characterized by.

  According to this configuration, since the plug blade and the electric wire are caulked and joined, and the plug housing is formed at the same time as the plug blade, the internal charging portion is exposed when the plug housing is disassembled. In addition, the number of parts is small and it can be provided at a low cost.

  According to a seventh aspect of the present invention, in the first to fifth aspects of the invention, the electric wire is connected by a terminal screw that is screwed into a terminal portion provided on the plug blade, and the plug blade is fixed to the plug housing. The plug body is formed by a plug cover that is abutted against the plug body in the protruding direction of the plug blade.

  According to this configuration, since the plug blade and the electric wire are connected using the terminal screw, and the plug body and the plug cover are abutted to constitute the plug housing, the electric wire having a desired length is connected in the field. It is possible to prevent waste of electric wires.

  The invention of claim 8 is characterized in that, in the invention of claim 7, a tension stopper member which is fixed to the plug housing and holds the electric wire is provided at a portion where the electric wire is drawn out from the plug housing.

  According to this configuration, since the tension stopper member is provided while adopting a configuration in which the electric wire is connected to the plug blade by the terminal screw, the tension acting on the electric wire is prevented from acting on the connection portion with the plug blade. be able to.

  According to a ninth aspect of the present invention, in the first to eighth aspects of the present invention, a portion between the plug blades of both voltage electrodes in a surface of the plug housing from which the plug blade protrudes is a creeping surface between the plug blades. A groove for increasing the distance is formed.

  According to this configuration, since the groove portion is formed in the plug housing at the portion between the plug blades of the two voltage electrodes, the creepage distance between the plug blades of the two voltage electrodes can be increased. Creeping discharge does not occur and safety is improved.

  According to the configuration of the present invention, compared with the conventional configuration in which the two plug blades of the voltage electrode are arranged side by side on a straight line in the longitudinal direction of the cross section, the size of the portion where the plug blades of the voltage electrode are arranged can be reduced. There is an advantage that a plug housing having a smaller width than the conventional configuration can be used.

(Embodiment 1)
As shown in FIGS. 1 to 5, the plug according to the present embodiment includes a plug housing 60 that holds three plug blades 71 to 73 that are respectively inserted into three insertion openings that open in the outlet housing. The plug housing 60 is formed by abutting a plug body 61 and a plug cover 62 each formed in a thin box shape. The plug body 61 and the plug cover 62 project from the inner bottom surface of the plug body 61. The assembled bosses 61a are coupled by using three assembly screws 63 that are respectively screwed through the plug cover 62.

  The inside of the plug body 61 is between a cylindrical partition wall 64a provided at the center, and an outer peripheral surface of the partition wall 64 and an outer peripheral surface of a boss 61a provided at the upper end of the plug body 61 (upper right end in FIG. 1). Are divided into three chambers by a partition wall 64b formed to connect the two. In each chamber on the left and right sides of the partition wall 64a, terminal bosses 61b whose projecting dimensions from the inner bottom surface of the plug body 61 are smaller than the bosses 61a are respectively formed. , 72 are respectively fixed using mounting screws 74 (see FIG. 6).

  The plug blade 71 includes a flat blade portion 71a and a terminal portion 71b continuous in a shape orthogonal to the blade portion 71a. The blade portion 71 a protrudes outside the plug housing 60 through a lead-out hole 65 a drilled in the bottom wall of the plug body 61. The terminal portion 71b has a shape extended in the width direction of the blade portion 71a after being extended in the thickness direction of the blade portion 71a, and the fixing hole 71c into which the mounting screw 74 described above is inserted into the terminal portion 71b. At the same time, a terminal screw hole 71d into which the terminal screw 75a is screwed is formed.

  Similarly to the plug blade 71, the plug blade 72 includes a flat blade portion 72 a and a terminal portion 72 b that is continuous with the blade portion 72 a, and the blade portion 72 a is led out from the bottom wall of the plug body 61. It protrudes outside the plug housing 60 through the hole 65b. On the other hand, the terminal portion 72b has a shape extended in the thickness direction of the blade portion 72a, and the terminal screw 75b is screwed into the terminal portion 72b together with the fixing hole 72c into which the mounting screw 74 described above is inserted. A terminal screw hole 72d is formed.

  In each plug blade 71, 72, the positions where the terminal screws 75 a, 75 b are screwed to the terminal portions 71 b, 72 b are the left and right of the boss 61 a provided at the upper end of the plug body 61, and the terminal screws 75 a, 75 b are It arrange | positions so that it may align on the straight line of a direction, and the blade parts 71a and 72a are arrange | positioned so that it may mutually orthogonally cross. That is, the blade portions 71a and 71b are arranged so as to be compatible with the voltage electrode insertion port provided in the outlet.

  The plug blade 73 which is a grounding electrode includes a blade portion 73a and a terminal portion 73b like the plug blades 71 and 72, and the terminal portion 73b is formed to be orthogonal to the longitudinal direction of the blade portion 73a. However, the blade portion 73a is bent not in a flat plate shape but in a U-shaped cross section. The terminal portion 73b is formed in a shape that can be disposed inside the partition wall 64a. The terminal portion 73b is screwed into a terminal boss (not shown) provided on the inner bottom surface of the plug body 61 inside the partition wall 64a. A fixing hole 73c into which the fitting screw 74 to be mated is inserted and a terminal screw hole 73d into which the terminal screw 75c is screwed are formed. In the bottom wall of the plug body 61, a lead-out hole 65c for projecting the blade portion 73a to the outside is formed. Here, the dimension in which the blade part 73a of the plug blade 73 that is a ground electrode protrudes from the plug body 61 is larger than the dimension in which the blade parts 71a and 72a of the plug blades 71 and 72 that are voltage electrodes protrude from the plug body 61. Is set.

  A part of the partition wall 64a is formed with a lead-out hole 64c through which an electric wire connected to the plug blade 73 is pulled out of the partition wall 64a by a terminal screw 75c. The electric wires connected to the plug blades 71 to 73 using the terminal screws 75a to 75c are formed so as to straddle the plug body 61 and the plug cover 62 on the lower wall of the plug housing 60 (the lower left wall in FIG. 1). It is drawn to the outside through a round electric wire outlet 60a. That is, the protruding direction of the plug blades 71 to 73 with respect to the plug housing 60 and the direction of drawing out the electric wire are orthogonal to each other so that the protruding amount of the electric wire from the outlet becomes small when connected to the outlet. The plug body 61 is provided with a tension stopper plate 67 that clamps the electric wire between the inner bottom surface of the plug body 61, and both ends of the tension stopper plate 67 are provided corresponding to the stopper holes 61 c provided in the plug body 61. It is fixed to the plug body 61 by a set screw 67a which is screwed into the nut.

  An insertion protrusion that fits into an insertion recess provided in a portion surrounding all the insertion ports in the outlet in a portion surrounding the outlet holes 65a to 65c from which the plug blades 71 to 73 protrude on the outer surface of the plug housing 60. A stand 68 is projected. The outer peripheral edge of the insertion stand 68 is arc-shaped at both upper and lower ends, and is formed in an oval shape that is long in the vertical direction in which both arc-shaped portions are continuous with left and right straight portions. The blade portion 71 a of the plug blade 71 is parallel to the straight portion of the insertion protrusion 68, and the peripheral surface of the insertion protrusion 68 is orthogonal to the outer surface of the plug body 61. Thus, the plug blades 71 to 73 are protruded from the front end surface of the insertion stand 68, and the plug blades 71 to 73 are inserted into the insertion openings opened on the bottom surface of the insertion recess. 60, the butting surface of the portion excluding the insertion recess and the insertion stand 68 is different from the surface from which the plug blades 71 to 73 protrude from the plug housing 60. Foreign matter is less likely to adhere and safety is increased. Two groove portions 68a parallel to the blade portion 71a of the plug blade 71 are formed on the tip surface of the insertion stand 68 between the plug blades 71 and 72 of both voltage electrodes. The creepage distance between 72 is large.

  On the outer surface of the plug housing 60, there are formed recesses 69 for extraction at three locations, the left and right side surfaces and the upper surface. When the plug housing 60 is removed from the outlet housing, the pull-out recess 69 is formed so that a hooking step 69a provided on the plug cover 62 becomes a finger hook, so that the plug can be easily removed from the outlet. become. That is, if there is no hanging stepped portion 69a, it is necessary to ensure the frictional force with the finger by increasing the thickness dimension of the plug housing 60. However, the provision of the hanging stepped portion 69a improves the hooking of the finger. In particular, the thickness dimension of the plug housing 60 can be made relatively small. If only the hooking of the finger is ensured, it is only necessary to provide the hooking recess 69 with the stepped portion 69a. In this embodiment, the finger contacts the plug blades 71 to 73 when the plug is removed from the outlet. In order to prevent this, a partition stepped portion 69b is formed on the side near the surface from which the plug blades 71 to 73 protrude in the pulling recess 69. In other words, in the present embodiment, the pull-out recess 69 is formed between the hanging stepped portion 69a and the partition stepped portion 69b. With such a configuration, it is possible to prevent the finger from coming into contact with the plug blades 71 to 73 even when the plug having the thin plug housing 60 is removed from the outlet, and to safely perform the operation of removing the plug from the outlet. it can.

(Embodiment 2)
In the first embodiment, the plug blades 71 to 73 are provided with terminal portions 71b, 72b, and 73b, respectively, and a configuration is adopted in which electric wires are connected using terminal screws 75a to 75c that are screwed into the terminal portions 71b, 72b, and 73b. However, in this embodiment, as shown in FIG. 7, each plug blade 71 to 73 is provided with caulking portions 71e, 72e, 73e having a U-shaped cross section, and the caulking portions 71e, 72e, 73e have electric wires L1, L2, and so on. A configuration in which L3 is caulked and joined is employed. That is, the core wires of the electric wires L1 to L3 are arranged inside the caulking portions 71e, 72e, and 73e, and the caulking portions 71e, 72e, and 73e are caulked so as to wind the electric wires L1 to L3, whereby the electric wires L1 to L3 are plugged. 71-73.

  Further, the plug housing 60 of the present embodiment is not formed by abutting the plug body 61 and the plug cover 62 but is formed integrally with the plug blades 71 to 73 by a synthetic resin. That is, after connecting the electric wires L1 to L3 to the plug blades 71 to 73, the plug housing 60 is integrally formed, and the connection portion between the plug blades 71 to 73 and the electric wires L1 to L3 is connected to the plug housing 60. Further, a part of the electric wires L <b> 1 to L <b> 3 is embedded in the plug housing 60. The three electric wires L <b> 1 to L <b> 3 are housed in a sheath to form one cable Lp, and the cable Lp is drawn from the plug housing 60. The drawing position of the cable Lp (that is, the drawing position of the electric wire) is the same as that of the first embodiment, and the protruding direction of the plug blades 71 to 73 and the drawing direction of the cable Lp are orthogonal to each other. As shown in FIG. 8, a bushing 66 is formed at a portion of the plug housing 60 where the cable Lp is pulled out so as to protrude from the plug housing 60 so as to be integrated with the plug housing 60. The bushing 66 wraps the cable Lp and is formed flexibly so that it can be bent according to the bending of the cable Lp. The tension acting on the cable Lp is caused by the bushing 66 through which the cable Lp is inserted and the plug housing 60 in which the electric wires L1 to L3 are embedded at the connecting portion between the plug blades 71 to 73 and the electric wires L1 to L3. Stopped so as not to reach. Further, even if a part of the tension acting on the cable Lp reaches the connecting portion between the plug blades 71 to 73 and the electric wires L1 to L3, the electric wires L1 to L3 and the plug blades 71 to 73 are firmly connected by caulking. Since they are coupled, the power sources L1 to L3 do not come off from the plug blades 71 to 73. Other configurations and functions are the same as those of the plug described as the first embodiment.

  In the above-described embodiment, the plug housing 68 is formed in the plug housing 60. However, the same effect can be expected even if the plug recess is provided in the plug and the plug socket is provided in the outlet. it can.

(Embodiment 3)
In the first embodiment and the second embodiment, the example in which the protruding direction of the plug blades 71 to 73 from the plug housing 60 and the drawing direction of the electric wire (cable Lp) from the plug housing 60 is orthogonal is shown. As shown in FIGS. 9 and 10, the plug is such that the protruding direction of the plug blades 71 to 73 from the plug housing 60 is parallel to the direction in which the electric wire (cable Lp) is drawn from the plug housing 60. Moreover, the plug housing 60 is formed in a shape in which a cross section perpendicular to the protruding direction of the plug blades 71 to 73 matches the opening surface of the insertion recess provided in the outlet housing. That is, the outer peripheral surface of the plug housing 60 has a cross section orthogonal to the protruding direction of the plug blades 71 to 73 that matches the shape of the inner peripheral surface of the insertion recess provided in the outlet housing, and the protruding direction of the plug blades 71 to 73. One end of the plug housing 60 can be fitted into an insertion recess provided in the outlet housing.

  Thus, by inserting a part of the plug housing 60 into the insertion recess provided in the outlet housing, the plug housing 60 functions in the same manner as the insertion protrusion 68 in the first and second embodiments. The opening surface of the insertion recess is closed by the plug housing 60, and the plug blades 71 to 73 are inserted into the outlet of the outlet behind the opening surface of the insertion recess. That is, foreign matters such as dust, metal pieces, and water droplets are less likely to touch the plug blade, and safety can be improved. In addition, since the projected area of the plug housing 60 with respect to the outlet housing is approximately the same as the opening surface of the insertion recess, the projected area is smaller than the configurations of the first and second embodiments, and a small plug. Can be provided.

  By the way, the plug housing 60 of this embodiment can be divided | segmented in the protrusion direction of the plug blades 71-73, Comprising: In the protrusion direction of the plug body 61 holding the plug blades 71-73, and the plug blades 71-73. The plug cover 61 is formed by a plug cover 62 which is abutted against the plug body 61 and covers the connecting portions of the plug blades 71 to 73 and the electric wires L1 to L3 (see FIG. 7) together with the plug body 61. The outer peripheral surfaces of the plug body 61 and the plug cover 62 are oval and have the same shape in a cross section perpendicular to the protruding direction of the plug blades 71 to 73. The plug body 61 and the plug cover 62 are both cylindrical with a bottom, and the plug cover 62 is larger than the plug body 61 with respect to the dimensions of the plug blades 71 to 73 in the protruding direction. The plug body 61 and the plug cover 62 are coupled by an assembly screw (not shown) that is screwed through a plug cover 62 to a boss (not shown) standing on the plug body 61. Further, if it is not necessary to attach and detach the plug body 61 and the plug cover 62, the plug body 61 and the plug cover 62 may be fixed by a technique such as ultrasonic welding.

  The cable Lp is pulled out from the bottom wall of the plug cover 62 and is sandwiched between a pair of tension stoppers 67 b fixed to the plug cover 62. Both the tension stop members 67b are orthogonal to the flexible piece 67d from the tip of the flexible piece 67d, a flexible piece 67d extending from the cylindrical part 67c, and a semicircular cylindrical portion 67c that sandwiches the cable Lp. And a fixing piece 67e that extends in a shape and is fixed to the plug cover 62. Further, attachment pieces 67f are extended on both side edges of the cylindrical portion 67c, and a set screw 67g inserted through the attachment piece 67f in one tension stop member 67b is screwed into the attachment piece 67f in the other tension stop member 67b. Accordingly, the distance between the cylindrical portions 67c can be changed according to the tightening amount of the set screw 67g. That is, one end of the flexible piece 67d is fixed to the plug cover 62, but the other end continuous to the cylindrical portion 67c is a free end. Therefore, the flexible piece 67d is set according to the tightening amount of the set screw 67g. Therefore, the distance between the cylindrical portions 67c can be changed. Other configurations and functions are the same as those of the plug described in the first embodiment.

(Embodiment 4)
As shown in FIGS. 11 and 12, the present embodiment is a plug having the same external shape as that of the third embodiment. Each plug blade 71 to 73 has a U-shaped caulking portion 71e, 72e, 73e ( 7) is provided, and a configuration is adopted in which the electric wires L1, L2, and L3 are caulked and coupled to the caulking portions 71e, 72e, and 73e, respectively. That is, the core wires of the electric wires L1 to L3 are arranged inside the caulking portions 71e, 72e, and 73e, and the caulking portions 71e, 72e, and 73e are caulked so as to wind the electric wires L1 to L3, whereby the electric wires L1 to L3 are plugged. 71-73.

  The plug housing 60 of the present embodiment is molded integrally with the plug blades 71 to 73 by a synthetic resin. That is, after connecting the electric wires L1 to L3 to the plug blades 71 to 73, the plug housing 60 is integrally formed. With this configuration, the connection portions between the plug blades 71 to 73 and the electric wires L1 to L3 are embedded in the plug housing 60, and part of the electric wires L1 to L3 are also embedded in the plug housing 60.

  The drawing position of the cable Lp from the plug housing 60 (that is, the drawing position of the electric wire) is the same as in the third embodiment, and the protruding direction of the plug blades 71 to 73 is parallel to the drawing direction of the cable Lp. A bushing 66 is formed at a portion of the plug housing 60 where the cable Lp is drawn out so as to protrude from the plug housing 60 continuously and integrally with the plug housing 60. The bushing 66 wraps around the cable Lp and is formed to be flexible so that it can bend according to the bending of the cable Lp. The tension acting on the cable Lp is caused by the bushing 66 through which the cable Lp is inserted and the plug housing 60 in which the electric wires L1 to L3 are embedded at the connecting portion between the plug blades 71 to 73 and the electric wires L1 to L3. Stopped so as not to reach. Further, even if a part of the tension acting on the cable Lp reaches the connecting portion between the plug blades 71 to 73 and the electric wires L1 to L3, the electric wires L1 to L3 and the plug blades 71 to 73 are firmly connected by caulking. Since they are coupled, the power sources L1 to L3 do not come off from the plug blades 71 to 73. Other configurations and functions are the same as those of the plug described as the third embodiment. Other configurations and functions are the same as those of the plug described in the third embodiment.

1 is an exploded perspective view showing Embodiment 1. FIG. It is a perspective view same as the above. It is a front view same as the above. It is a side view same as the above. It is a rear view same as the above. It is the front view which removed the plug cover same as the above. Embodiment 2 is shown, (a) is a front view, (b) is a side view, and (c) is a bottom view. It is a perspective view same as the above. Embodiment 3 is shown, (a) is a front view, (b) is a side view, and (c) is a bottom view. It is a perspective view same as the above. Embodiment 4 is shown, (a) is a front view, (b) is a side view, and (c) is a bottom view. It is a perspective view same as the above. It is a front view which shows a prior art example.

Explanation of symbols

60 Plug housing 61 Plug body 62 Plug cover 67b Tension stop member 68 Insertion stand 68a Groove 69 Pull-out recess 69a Hanging stepped portion 69b Partition stepped portion 71 (first) plug blade 71b Terminal portion 71e Caulking portion 72 (first) 2) Plug blade 72b Terminal section 72e Caulking section 73 Plug blade (grounding electrode)
73b Terminal portion 73e Caulking portion 75a to 75c Terminal screw L1 to L3 Electric wire Lp Cable

Claims (9)

  A plug in which a three-pole plug blade including a ground electrode protrudes from one surface of a plug housing, and the first and second plug blades, which are voltage electrodes, each have a rectangular cross section and the longitudinal directions of the cross sections are mutually The second plug blade is separated from the first plug blade in the width direction of the cross section of the first plug blade, and the plug blade serving as the ground electrode is second in the width direction of the cross section of the second plug blade. A portion corresponding to a distance between one end of the second plug blade and the first plug blade, which is spaced from the first blade, in the longitudinal direction of the cross section of the second plug blade. Plug characterized by being located in.   In the plug housing, the cross section perpendicular to the protruding direction of the plug blade has an insertion recess formed in a part including all the insertion ports in the outlet housing having three insertion ports into which the plug blades are respectively inserted. The plug according to claim 1, wherein the plug housing is formed in a shape that conforms to the shape of the plug housing, and one end of the plug housing on the plug blade side can be fitted into the insertion recess.   In the outlet housing having three insertion holes into which the plug blades are respectively inserted, an insertion recess and an insertion protrusion that can be fitted to each other in a part including all the insertion openings in one surface provided with the insertion openings. One side of the plug housing is formed, and the other part of the insertion recess and the insertion base is formed in a portion including all the plug blades in one surface of the plug housing from which the blades protrude. The plug according to claim 1.   Of the outer surface of the plug housing provided with the plug blade, a pulling recess is formed on a surface intersecting one surface of the plug blade protruding, and in a portion of the pulling recess that is far from the surface from which the plug blade protrudes. The plug according to claim 3, wherein a step portion for hooking a finger is formed.   4. The plug according to claim 3, wherein a partition stepped portion for preventing a finger from contacting the plug blade is formed in a portion near the surface from which the plug blade protrudes in the drawing recess.   6. The device according to claim 1, wherein the electric wire is caulked and joined to a caulking portion provided on the plug blade, and the plug housing is formed integrally with the plug blade at the same time. 6. Plug.   The electric wire is connected by a terminal screw that is screwed into a terminal portion provided on the plug blade, and the plug housing includes a plug body to which the plug blade is fixed, and a plug cover that is abutted against the plug body in the protruding direction of the plug blade. The plug according to claim 1, wherein the plug is formed by:   The plug according to claim 7, wherein a tension stopper member that is fixed to the plug housing and holds the electric wire is provided at a portion where the electric wire is drawn out from the plug housing.   2. A groove for increasing a creepage distance between the plug blades is formed in a portion between the plug blades of both voltage electrodes in a surface of the plug housing from which the plug blade protrudes. The plug according to any one of claims 8 to 9.

Images