JP2008171744A - Attachment plug, manufacturing method thereof, and connection terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve durability of an attachment plug when inserting/pulling-out from a receptacle. <P>SOLUTION: Connection terminals 30 and 30 protrude from an insulated plug body 20 of an attachment plug 10, which are inserted in/pulled out of a receptacle 90, for electrically connecting to/disconnected from the receptacle. Recesses 34 and 34 are formed at the part 34a which is a root of the terminals 30 and 30 protruding from the plug body 20. An insulating material 40 is inserted in the recesses to cover the roots 34a and 34a of the terminals. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an insertion plug that is electrically connected to and disconnected from the plug receptacle by connecting / disconnecting the connection terminal to / from the plug receptacle, a connection terminal for the insertion plug, and a method of manufacturing the insertion plug About.

  When dust or the like accumulates between a pair of blades projecting from the plug body of the power plug, a tracking phenomenon occurs, in which the insulating material between the blades is carbonized due to moisture, thereby forming an electrical path (track). May occur. In order to prevent this tracking phenomenon, an insulating member is coated on the base portion of the pair of blades protruding from the plug body.

16 and 17 show a power plug 901 described in Patent Document 1. FIG. The power plug 901 includes a plug main body 903 made of an insulating material and a pair of connection terminals 904 and 904 that protrude outward from the plug main body. The connection terminal 904 has a base end portion connected to the power cord 906 supported inside the plug main body 903, and the surface extending from the inside of the plug main body 903 to the outside is integrated with an insulating member 905. It is covered. In a state where the connection terminals 904 and 904 are inserted into the plug connection ports 912 and 912 of the power outlet 911, a gap formed between the outer peripheral portion of the connection terminals 904 and 904 and the inner peripheral wall of the plug connection ports 912 and 912 is formed. Insulating members 905 and 905 are filled. Therefore, the insulating member 905 is provided on the general surface of the connection terminal 904, and the surface of the insulating member 905 is extended from the general surface of the connection terminal 904 to the position of the inner peripheral wall of the plug connection port 912.
JP 2006-49330 A

  From the above, when the power plug is repeatedly inserted and removed from the power outlet, the surface of the insulating member covered with the connection terminal rubs against the inner peripheral wall of the plug connection port, and the insulating material is turned up. For this reason, it has been desired to prevent the insulating material from turning over even when the power plug is repeatedly inserted and removed, and to improve the durability of the power plug.

  The present invention has been made in view of the above problems, and an object thereof is to improve the durability of an insertion plug when an insertion plug such as a power plug is inserted into or removed from a plug receptacle such as a power outlet. .

In order to achieve the above object, according to the present invention, a conductive connecting terminal protrudes from an insulated plug body, and is electrically connected to and disconnected from the plug receiver by inserting and removing the connecting terminal with respect to the plug receiver. In the plug, a recess is formed at the base of the connection terminal protruding from the plug body, and an insulating material is inserted into the recess to cover the base of the connection terminal.
The present invention also provides a connection terminal used for an insertion plug that protrudes from an insulated plug body and is electrically connected to and disconnected from the plug holder by being inserted into and removed from the plug holder. A concave portion is formed at a base protruding from the base, and an insulating material is inserted into the concave portion to cover the base.

  Since the insulating material is inserted into the concave portion at the base of the connection terminal to cover the base, the friction with the insulating material is reduced when the plug is inserted into and removed from the plug receptacle. Therefore, the durability of the connection terminal provided with the insulating material at the root protruding from the plug body is improved.

  Furthermore, the present invention provides a manufacturing method for an insertion plug in which a conductive connection terminal protrudes from an insulated plug body and is electrically connected to and disconnected from the plug receiver by inserting and removing the connection terminal with respect to the plug receiver. A method of manufacturing an insertion plug by forming a recess in a base portion of a connection terminal protruding from the plug body, inserting an insulating material into the recess and covering the base of the connection terminal. Features.

  In other words, when an insulating material is provided at the base of the connection terminal protruding from the plug body, the insulating material is inserted into the recess and the base of the connection terminal is covered to easily insulate at the base of the connection terminal. Material can be provided. Further, since the friction with the insulating material is reduced when the plug is inserted into and removed from the plug receptacle, a plug with improved durability can be manufactured.

  In addition, this invention is applicable also as a manufacturing method of the connecting terminal etc. which have the process corresponding to the manufacturing method of the plug mentioned above. Moreover, the structure described in Claim 2 and Claim 3 is also applicable to the manufacturing method of the said connecting terminal and the said insertion plug, and the manufacturing method of the said connecting terminal.

According to the invention which concerns on Claim 1, it becomes possible to improve the durability of the connection terminal which provided the insulating material in the root protruded from the plug main body.
In the invention according to claim 2, since the friction of the insulating material when the insertion plug is inserted and removed becomes smaller, the durability of the insertion plug can be further improved.
In the invention which concerns on Claim 3, the plug formed easily can be provided.

In the invention according to claim 4, since the friction to the insulating material is reduced when the plug is inserted into and removed from the plug receptacle, the durability of the connection terminal provided with the insulating material at the root protruding from the plug body is improved. It becomes possible.
According to the fifth aspect of the present invention, it becomes easy to provide an insulating material at a base portion of the connection terminal, and it is possible to manufacture an insertion plug with improved durability.

  Hereinafter, embodiments of the present invention will be described in the order of (1) the structure of the plug, (2) the method and function of manufacturing the plug, and (3) the modification.

(1) Configuration of the plug including the connection terminal:
FIG. 1 is an exploded perspective view of a wiring plug connector 100 having a plug 10 according to an embodiment of the present invention, FIG. 2 is a perspective view of a connection terminal 32 before coating, and FIGS. 3 and 4 are plug-ins. FIG. 5 and FIG. 6 are views showing how the plug 10 is formed.
The plug connector 100 is electrically connected to and disconnected from a power plug (plug plug) 10 having a pair of blades (connection terminals) 30, 30 according to an embodiment of the present invention. A power outlet (plug receptacle) 90 is configured, and by connecting and disconnecting the plug 10 with respect to the outlet 90, electrical connection and disconnection between the two 10, 90 can be easily performed as needed. The plug connector has a rated current of 15A, 20A, etc., a rated voltage of 125V, 250V, etc., and is used to supply AC power of 100V, 200V, etc.
In the outlet 90, a pair of blade receiving holes 93, 93 are formed in a plug receiving body 92 made of an insulating material having an insulating property, and a pair of metal (conductive) wiring connection terminals are located behind the blade receiving holes. When the blades 30, 30 are inserted into the blade receiving holes 93, 93, they are electrically connected to the plug 10.

The plug 10 includes a plug main body 20 that is insulated from electricity flowing inside, metal (conductive) blades 30 and 30 protruding from the plug main body, and a power cord 50. The cord 50 is covered with an insulating material having an insulating property such as a resin material such as vinyl chloride or a synthetic rubber, and is connected to an electric device or the like.
The plug body 20 is made of an insulating material such as a thermoplastic resin material such as vinyl chloride, a thermosetting resin material such as a phenol resin or a urea resin, a synthetic rubber, or a material obtained by adding an additive such as an inorganic insulating material to these materials. An insulating material having at least is used to hold the rear end portions 30b and 30b of the blades 30 and 30. Accordingly, the blades 30, 30 protrude forward from the front surface 20a of the insulated plug body. A cord 50 is drawn out from the rear surface 20b of the plug body. When forming the plug body, the molding material may be molded, or the rear end portion of the blade may be assembled in an assembly part for the plug body formed of a hard resin material or the like.

  In the present plug 10, a recess 34 is formed at the root 34 a of the blade 30 protruding from the plug body 20, and an insulating material 40 is inserted into the recess 34 to cover the root 34 a of the blade. When the blade 30 is inserted into the outlet 90, a portion of the blade 30 that is in front of the insulating material 40 comes into contact with the wiring connection terminal at the back of the blade receiving hole 92, and the plug 10 and the outlet 90 are electrically connected. Further, when the blade 30 is removed from the outlet 90, the portion of the blade 30 in front of the insulating material 40 is separated from the wiring connection terminal at the back of the blade receiving hole 92, and the plug 10 and the outlet 90 are electrically disconnected.

As shown in FIG. 2, each blade 32 before covering the insulating material 40 is formed in a plate shape elongated in the longitudinal direction D1 with a conductive metal, and a chamfered hole 31 is formed in the tip 30a. In addition, a recess 34 is formed in a portion 34 a that is the base of the blade protruding from the plug body 20. The blade 32 is formed into a predetermined shape by processing a metal plate such as copper or a copper alloy, for example, by pressing or the like, and is appropriately subjected to plating treatment for rust prevention. Of course, it is also possible to form the blade 32 by cutting the concave portion after forming a blade without the concave portion. Here, among the directions D2 and D3 orthogonal to the longitudinal direction D1, the vertical direction shown in FIG. 2 is referred to as a width direction D2, and the direction D3 orthogonal to the width direction is referred to as a thickness direction.
The recess 34 is formed to be recessed from the general surfaces 32 a to 32 d of the blade 32 at a position surrounding the root 34 a of the blade 32 protruding from the plug body 20.

In the case of an insertion plug for a 100V AC power supply, the length of the blade 30 protruding from the plug body 20 to the protruding direction (front side) in the longitudinal direction D1 (L1 in FIG. 4) is, for example, 17 ± 1.3 mm. On the other hand, the length L2 of the recess 34 protruding from the plug body 20 toward the protruding side in the longitudinal direction D1 is, for example, 2 to 5 mm, 3 to 4 mm. When L2 is made equal to or higher than the lower limit, the tracking phenomenon can be sufficiently prevented, and when L2 is made lower than the upper limit, sufficient electrical connection between the blade and the wiring connection terminal of the outlet can be ensured. Further, the length L3 of the concave portion 34 in the longitudinal direction D1 is not less than L2 (preferably longer than L2) as long as the rear end portion of the concave portion 34 is in front of the rear end portion 30b of the blade, For example, 5 to 15 mm and 6 to 10 mm are set.
Further, the width of the blade 30 corresponding to the length in the width direction D2 (corresponding to W1 in FIG. 3) is, for example, 6.3 ± 0.3 mm. When the blade is a ground side electrode, the width W1 may be 8.0 ± 0.2 mm. On the other hand, the width W2 of the recess 34 is, for example, 0.2 to 0.8 mm and 0.4 to 0.6 mm smaller than W1. The thickness W4 = (W1-W2) / 2 of the insulating material 40 in the width direction D2 is, for example, 0.1 to 0.4 mm and 0.2 to 0.3 mm.

Further, the thickness of the blade 30 (corresponding to T1 in FIG. 3) corresponding to the length in the thickness direction D3 is, for example, 1.5 ± 0.1 mm. On the other hand, the thickness T2 of the recess 34 is, for example, 0.1 to 0.6 mm and 0.2 to 0.4 mm smaller than T1. The thickness T4 = (T1-T2) / 2 of the insulating material 40 in the thickness direction D3 is, for example, 0.05 to 0.3 mm and 0.1 to 0.2 mm.
In addition, the distance between the centers of the blades 30 and 30 protruding from the plug body is, for example, 12.7 ± 0.1 mm.

  The insulating material 40 is embedded in the recess 34 of the blade and covers the base 34 a of the blade protruding from the plug body 20. In the present embodiment, the surface of the insulating material 40 inserted into the recess 34 is aligned with the positions of the surfaces of the general surfaces 32a to 32d so that the surface of the insulating material 40 is flush with the general surfaces 32a to 32d of the blade. Therefore, as shown in FIG. 7, the width W1 and the thickness T1 of the insulating material 40 filling the recess 34 are formed to be smaller than the width W3 and the thickness T3 of the blade receiving hole 93 of the outlet. As a result, the friction of the insulating material when the plug is inserted and removed is reduced, so that the durability of the plug is improved.

  Although the above configuration is suitable, as long as the width (W1) of the insulating material is smaller than the width (W3) of the blade receiving hole and the thickness (T1) of the insulating material is smaller than the thickness (T3) of the blade receiving hole, Even if the position of the surface of the insulating material is higher than the position of the surface on the general surface of the blade, the friction of the insulating material when the plug is inserted and removed is reduced, and the effect of improving the durability of the plug can be obtained.

  When the insulating material 40 is integrated with the blade 32, a molding material may be molded together with the blade 32, an insulating material may be coated or painted together with the blade 32, or an insulating material molded into a tubular shape may be used. It may be fitted into the recess 34 of the blade, or may be integrated with the plug body 20 by molding a molding material together with the blade 32, or an insulating material molded into a film shape may be attached to the recess 34 of the blade. . Molding materials that can be used for insulating materials include thermosetting resin molding materials such as silicon resin (silicone resin), phenol resin and urea resin, synthetic rubber such as silicone rubber, and thermoplastic resin molding material such as vinyl chloride. , Paints, materials obtained by adding flame retardants such as inorganic insulating materials, etc. to these materials are used, and halogen flame retardant resins such as silicon resins and fluorine resins, non-halogen flame retardant resins, etc. Flammable molding materials are preferred. The tubular insulating material fitted into the blade is preferably a heat-shrinkable resin molding material or an elastic material such as rubber.

  When the insulating material 40 is molded and inserted into the recess 34 of the blade and the blade 30 for assembling to the plug body 20 is formed, it is preferable because the plug can be easily formed using the blade 30. The blade 30 in which the insulating material is inserted into the recess can be circulated as a product alone, and a plug is manufactured when the blade 30 is assembled as a component to the plug body 20.

(2) Manufacturing method and operation of the plug:
Hereinafter, a method for manufacturing the power plug 10 will be described.
When the plug 10 is formed by assembling the blade 30 whose base projecting from the plug body is covered with an insulating material to the plug body, as shown in FIGS. 5 and 6, first, the insulating material is provided in the recess 34 of the blade 32 before coating. 40 is inserted, and the base portion 34a is covered with the insulating material to form the blade 30. Next, the power cord 50 is caulked or soldered to the rear end portions 30b and 30b of the blades 30 and 30 to be electrically connected. Furthermore, the plug 10 can be manufactured by forming the plug body 20 by molding or assembly so as to hold the rear end portions 30b, 30b of the blade to which the cord 50 is connected. Here, by inserting the insulating material into the recess, the base of the blade is easily covered, and the insulating material can be easily provided at the site that becomes the base of the connection terminal.

When the plug body 20 and the insulating material 40 are integrally formed by molding the molding material together with the blade 32 before coating, first, the power cord 50 is caulked to the rear end portions 30b, 30b of the blades 32, 32. Or by soldering. Next, the plug 10 can be formed by integrally molding the plug body 20 and the insulating material 40 with an insulating molding material so as to hold the rear end portions 30b, 30b of the blade to which the cord 50 is connected. .
Note that the cord 50 drawn from the plug body is appropriately connected to an electric device such as an electric appliance.

  In the formed plug 10, since the insulating material 40 is inserted into the recess 34 of the base 34 a to cover the base 34 a, as shown in FIG. 7, the surface of the insulating material 40 and the inner surface of the blade receiving hole 93 are used. A gap CL1 occurs between the two. Accordingly, when the plug 10 is inserted into and removed from the outlet 90, friction with the insulating material 40 is reduced, and the insulating material 40 is not turned up by repeatedly inserting and removing the plug. Therefore, it is possible to improve the durability of the blade provided with the insulating material at the root protruding from the plug body.

  As described above, even if the plug is repeatedly inserted and removed and dust is collected between the pair of blades protruding from the plug body by using the plug for a long period of time, the insulating material that covers the root of the blade without turning over becomes dust etc. Do not allow electricity to flow, and do not carbonize the insulation between the blades. Accordingly, the tracking phenomenon is prevented and the durability of the power plug can be improved.

(3) Modification:
Since the width W1 of the blade 32 is longer than the thickness T1, the depth W5 = (W1-W2) / 2 of the concave portion 34 in the width direction D2 is set to the depth T5 = (T1-T2) / 2 of the concave portion 34 in the thickness direction D3. It may be deeper. Accordingly, the thickness W4 of the insulating material 40 in the width direction D2 may be made thicker than the thickness T1 of the insulating material 40 in the thickness direction D3. Thereby, the durability of the insulating material is improved by the thickened upper and lower surfaces 32a and 32b while ensuring the durability of the connection terminal, so that the durability of the plug can be improved.

Moreover, even if it is an insertion plug which has the connection terminals 130, 230, 330, and 430 as shown in FIGS. 8-15, the effect which improves the durability of an insertion plug is acquired. 11 shows the connection terminal shown in FIG. 10 viewed from the direction of B1 and B2, FIG. 13 shows the connection terminal shown in FIG. 12 from the direction of B3 and B4, and FIG. 15 shows the connection terminal shown in FIG. The terminals are shown as seen from the direction of B5 and B6.
In the plug 110 shown in FIGS. 8 and 9, recesses 134, 134 are formed at the bases of the connection terminals 132, 132 protruding from the plug body 20, and through holes 135, 135 penetrating in the thickness direction D3 are formed in the recesses. The insulating materials 140 and 140 are formed, inserted into the recesses 134 and 134, and connected to the thickness direction D3 in the through holes 135 and 135 to cover the bases of the connection terminals 132 and 132. The through hole 135 connects the side surfaces corresponding to the side surfaces 32c and 32d on both sides in the thickness direction D3 in the recess 134, and connects the inner side surfaces on both sides in the thickness direction D3 of the insulating material 140 with the insulating material 140 filled therein. Yes. This connection terminal 130 is easily formed when an insulating molding material is formed together with the connection terminal before coating and the base of the connection terminal is covered with the insulating material.
In the plug 110, since the insulating material in the through-hole 135 is caught in the through-hole 135 and the insulating material is difficult to be removed from the concave portion of the connection terminal, the durability of the insulating material can be improved, and the durability of the plug-in plug can be improved. Can be improved.

  Instead of the through-hole 135 or together with the through-hole 135, a second recess that is further recessed in at least one of the side surfaces corresponding to the side surfaces 32a and 32b on both sides of the width direction D2 in the recess 134 may be formed. Then, since the insulating material inserted into the second recess is caught by the second recess and the insulating material does not easily come off from the recess of the connection terminal, the durability of the insulating material is improved and the durability of the plug is improved. improves.

  In the plug shown in FIGS. 10 and 11, recesses 234 and 234 having a deepened tip 30 a side are formed at the bases of the connection terminals 232 and 232 protruding from the plug body 20, and the insulating material 240 is formed in the recesses 234 and 234. The base of the connection terminals 232 and 232 is covered by being inserted. That is, the concave portion 234 has at least a portion where the width in the width direction D2 becomes wider toward the rear end 30b, and has at least a portion where the thickness in the thickness direction D3 increases toward the rear end 30b. On the distal end 30a side of the recess 234, a vertical surface 234b is formed that hooks the distal end side of the insulating material 240 so as to restrict the movement of the insulating material 240 in the longitudinal direction D1 distal end 30a side. As a result, the insulating material is less likely to come off in the distal direction, and the insulating material is less likely to be detached from the concave portion of the connection terminal, so that the durability of the insulating material is improved and the durability of the plug is improved.

Further, when a connection terminal is formed by fitting an insulating material formed into a tubular shape, such as a heat-shrinkable tube, into the recess of the connection terminal before coating, the thickness of the insulating material 240 in the longitudinal direction D1 becomes substantially constant. That is, the insulating material 240 inserted into the recess 234 has at least a portion where the width in the width direction D2 becomes wider toward the rear end 30b side, and at least a portion where the thickness in the thickness direction D3 increases toward the rear end 30b side. Have. At this time, a gap is formed between the outer surface of the insulating material and the inner surface of the blade receiving hole 93 on the front end side of the insulating material (preferably connected so as to be substantially flush with the general surfaces 32a to 32d of the connection terminals). The thickness and width of the insulating material increase on the rear end side of the insulating material. Here, if the outer surface of the insulating material on the front surface of the plug body 20 has a thickness and a width that can be inserted into the blade receiving hole 93, the outer surface of the insulating material and the blade receiving hole 93 on the front surface portion of the plug body 20. Since the gap between the inner surface and the inner surface of the blade is reduced, dust or the like is prevented from entering between the connection terminal and the blade receiving hole, and rattling of the plug is suppressed.
The shape of the recess 234 described above may be formed only on a part of both side surfaces of the recess in the width direction D2 and both side surfaces in the thickness direction D3. In such a case, similar actions and effects can be obtained.

  In the plug shown in FIGS. 12 and 13, the base of the connection terminals 332 and 332 projecting from the plug body 20 has a plurality of portions whose width in the width direction D2 becomes wider toward the rear end 30b side, and the rear end 30b side. The concave portions 334 and 334 having a plurality of portions where the thickness direction D3 becomes thicker are formed, and the insulating material 340 is inserted into the concave portions 334 and 334 to cover the bases of the connection terminals 332 and 332. On the distal end 30a side of the recess 334, a vertical surface 334b is formed to hook the distal end side of the insulating material 340 so as to restrict the movement of the insulating material 340 toward the distal end 30a side in the longitudinal direction D1. In this modified example, the anti-slip effect of the insulating material is large, the insulating material is difficult to come off in the tip direction, and the insulating material is difficult to come off from the concave portion of the connection terminal, so the durability of the insulating material is improved and the plug plug Durability is improved.

  In addition, when the connection terminal is formed by fitting the insulating material formed into a tubular shape into the recess of the connection terminal before coating, the thickness of the insulation material 340 in the longitudinal direction D1 becomes substantially constant. At this time, a gap is formed between the outer surface of the insulating material and the inner surface of the blade receiving hole 93 on the front end side of the insulating material (preferably connected so as to be substantially flush with the general surfaces 32a to 32d of the connection terminals). The thickness and width of the insulating material increase on the rear end side of the insulating material. Therefore, dust or the like is prevented from entering between the connection terminal and the blade receiving hole for the reason described above, and rattling of the plug is suppressed. Of course, the shape of the concave portion 334 described above may be formed only on a part of both side surfaces in the width direction D2 and both side surfaces in the thickness direction D3 of the concave portion. In such a case, similar actions and effects can be obtained. .

In the plug shown in FIGS. 14 and 15, recesses 434 and 434 are formed at the bases of the connection terminals 432 and 432 protruding from the plug main body 20, with the tip 30 a side deepened and the rear end 30 b side deepened. A material 440 is inserted into the recesses 434 and 434 to cover the bases of the connection terminals 432 and 432. In this case, a vertical surface 434b is formed on the front end 30a side of the recess 434, and a vertical surface 434c is formed on the rear end 30b side of the recess 434. In this modified example, the insulating material is less likely to come out in the front end direction and the rear end direction, and the insulating material is less likely to come off from the concave portion of the connection terminal. Therefore, the durability of the insulating material is improved, and the durability of the plug is improved. . In addition, when forming the connection terminal by fitting the insulating material formed into a tubular shape into the recess of the connection terminal before coating, dust and the like are prevented from entering between the connection terminal and the blade receiving hole, and the plug plug Shaking is suppressed.
Of course, the shape of the concave portion 434 described above may be formed only on a part of both side surfaces of the concave portion in the width direction D2 and both side surfaces in the thickness direction D3. In such a case, similar actions and effects can be obtained. .

  Note that the present invention is not limited to the above-described embodiments and modifications, but the configurations disclosed in the above-described embodiments and modifications are mutually replaced, the combinations are changed, known techniques, and the above-described configurations. Configurations in which the respective configurations disclosed in the embodiments and modifications are mutually replaced or combinations thereof are also included.

The disassembled perspective view which decomposes | disassembles and shows the example of the plug-in connector for wiring. The perspective view which shows the example of the connection terminal before coating | covering. FIG. 2 is a vertical cross-sectional view showing the plug shown in FIG. 1 in cross-section at the position A1-A1 in FIG. FIG. 2 is a horizontal cross-sectional view showing the plug shown in FIG. 1 in cross-section at the position A2-A2 in FIG. The figure which shows a mode that the insertion plug shown in FIG. 1 is formed seen from a side surface. The figure which shows a mode that the insertion plug shown in FIG. 1 is formed seen from an upper surface. The vertical sectional view which shows the example of the state which inserted the plug in the plug receptacle, and shows it in cross section. The perspective view which shows the modification of a connection terminal. The horizontal sectional view which shows the modification of an insertion plug in the cross-sectional view in the position corresponded to A2-A2 of FIG. The perspective view which shows the modification of a connection terminal. The figure which shows the connection terminal before and behind the coating | cover of an insulating material in the modification shown in FIG. The perspective view which shows the modification of a connection terminal. The figure which shows the connection terminal before and behind the coating | cover of an insulating material in the modification shown in FIG. The perspective view which shows the modification of a connection terminal. The figure which shows the connection terminal before and behind the coating | cover of an insulating material in the modification shown in FIG. The disassembled perspective view which decomposes | disassembles and shows the prior art example of the plug-in connector for wiring. FIG. 17 is a horizontal sectional view showing the power plug shown in FIG. 16 in section.

Explanation of symbols

10, 110 ... Power plug (plug), 20 ... Plug body,
30, 130, 230, 330, 430 ... blade (connection terminal),
30a ... tip portion, 30b ... rear end portion, 31 ... bocce hole,
32 ... Blade before coating, 32a to 32d ... General surface, 34 ... Recess, 34a ... Root,
40,140,240,340,440 ... insulating material,
50 ... code,
90 ... Plug receptacle, 92 ... Plug receptacle body, 93 ... Blade receptacle hole,
100: Plug-in connector for wiring,
CL1 ... Gap,
D1 ... longitudinal direction, D2 ... width direction, D3 ... thickness direction,

Claims (5)

A conductive connection terminal protrudes from the insulated plug body, and is an insertion plug that is electrically connected to and disconnected from the plug receiver by inserting and removing the connection terminal with respect to the plug receiver.
A plug is characterized in that a recess is formed at the base of the connection terminal protruding from the plug body, and an insulating material is inserted into the recess to cover the base of the connection terminal. The recess is formed to be recessed from the general surface of the connection terminal at a position surrounding the base of the connection terminal protruding from the plug body.
The insulating material inserted into the recess covers the periphery of the base of the connection terminal protruding from the plug body, and the position of the surface of the insulating material is matched to the position of the surface of the general surface of the connection terminal. The plug according to claim 1.   The plug according to claim 1 or 2, wherein the insulating material is molded and inserted into a recess of the connection terminal, and the connection terminal is assembled to the plug body. A connection terminal used for an insertion plug that protrudes from an insulated plug body and is electrically connected to and disconnected from the plug receptacle by inserting / removing the plug receptacle,
A connecting terminal, wherein a recess is formed at a base protruding from the plug body, and an insulating material is inserted into the recess to cover the base. A method for manufacturing an insertion plug in which a conductive connection terminal protrudes from an insulated plug body and is electrically connected to and disconnected from the plug receiver by inserting and removing the connection terminal with respect to the plug receiver,
A plug is manufactured by forming a recess at a base portion of the connection terminal protruding from the plug body, inserting an insulating material into the recess and covering the base of the connection terminal. Plug manufacturing method.

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