JP2010205468A - Power plug and method for manufacturing the same - Google Patents

Power plug and method for manufacturing the same Download PDF

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Publication number
JP2010205468A
JP2010205468A JP2009047592A JP2009047592A JP2010205468A JP 2010205468 A JP2010205468 A JP 2010205468A JP 2009047592 A JP2009047592 A JP 2009047592A JP 2009047592 A JP2009047592 A JP 2009047592A JP 2010205468 A JP2010205468 A JP 2010205468A
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Prior art keywords
blade
core
electric wire
cord
power plug
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Japanese (ja)
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Kan Hyo
歓 馮
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KAWASAKI DENSEN KK
Kawasaki Electric Wire Co Ltd
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KAWASAKI DENSEN KK
Kawasaki Electric Wire Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of a large number of steps necessary to manufacture a power plug provided with a core, attributable to the necessity of forming a hole for fitting a pair of blades and a blade holding portion in the core, which makes the structure complex. <P>SOLUTION: In the power plug, a coating portion that coats the root portion of a blade and an electric wire of a code connected to the blade are integrally formed to form a core. At this time, the root portion of the blade and the electric wire of the code connected to the blade are held by the core by being embedded therein. Then, the plug body is formed such that the entire core is embedded and held therein. Instead of forming the plug body such that the entire core is embedded and held therein, the plug body may be formed such that the top surface of the core is exposed. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、電源プラグおよびその製造方法に関する。   The present invention relates to a power plug and a method for manufacturing the same.

電源プラグは、トラッキングの防止のために、コンセントに差し込む刃の根元部分に絶縁樹脂で被覆している。このトラッキング防止用絶縁樹脂は、従来例では、中子の樹脂やプラグ本体の樹脂とは別個のキャップ状に形成された樹脂（ブレードキャップ）が用いられている。電源プラグのこのようなキャップ状の樹脂を開示するものとしては、例えば、特開平１０ー８３８５５号公報の間隙充填部材、特開２００６−４９３３０号公報の間隙充填部、特許３３７７４００号のブレードキャップ等がある。   In order to prevent tracking of the power plug, the base portion of the blade inserted into the outlet is covered with an insulating resin. In the conventional example, the insulating resin for tracking prevention uses a resin (blade cap) formed in a cap shape different from the resin of the core and the resin of the plug body. Examples of such a cap-shaped resin for the power plug include a gap filling member disclosed in Japanese Patent Laid-Open No. 10-83855, a gap filling portion disclosed in Japanese Patent Laid-Open No. 2006-49330, and a blade cap disclosed in Japanese Patent No. 3377400. There is.

上記従来例の電源プラグを改良するために、刃を保持するために、プラブ本体の樹脂内に中子を配設し、この配設された中子とブレードキャップを一体的に成形するものが特開２００６−４９２２３号公報に提案されている。この公報の電源プラグでは、成形された中子は、その後、刃が突出する面を露呈させた状態で、射出成形によりプラグ本体内に保持される。
特開平１０ー８３８５５号公報 特開２００６−４９３３０号公報 特許３３７７４００号 特開２００６−４９２２３号公報 In order to improve the power plug of the conventional example, a core is disposed in the resin of the plug main body to hold the blade, and the disposed core and the blade cap are integrally molded. It is proposed in Japanese Patent Application Laid-Open No. 2006-49223. In the power plug of this publication, the molded core is then held in the plug body by injection molding with the surface from which the blade protrudes exposed.
JP-A-10-83855 JP 2006-49330 A Patent 3377400 JP 2006-49223 A

特開２００６−４９２２３号公報に記載のような中子とブレードキャップを一体的に成形する電源プラグでは、一対の刃は中子に形成された穴に差し込まれて中子に取り付けられるものであり、取り付けられた刃は中子に設けられた刃保持部によって保持されるようになっている。   In a power plug that integrally forms a core and a blade cap as described in JP 2006-49223 A, a pair of blades are inserted into holes formed in the core and attached to the core. The attached blade is held by a blade holding portion provided in the core.

このため、中子自体は一対の刃を取り付けるための穴の形成や刃保持部の形成が必要であり、構造上複雑となり、多数の工程を必要とする問題がある。   For this reason, the core itself requires the formation of a hole for attaching a pair of blades and the formation of the blade holding part, which is complicated in structure and requires many steps.

したがって、本発明の目的は、中子自体に一対の刃を取り付けるための穴の形成や刃保持部の形成を必要とせず、コンセントに差し込む刃の根元部分に絶縁樹脂（ブレードキャップ）と中子を一体に成形するとともに、刃の下部部分を中子内部に成形により埋設させることができる構造の電源プラグを提供することにある。   Accordingly, an object of the present invention is not to form a hole for attaching a pair of blades to the core itself, nor to form a blade holding portion, and an insulating resin (blade cap) and a core at the base portion of the blade to be inserted into the outlet And a power plug having a structure in which the lower portion of the blade can be embedded in the core by molding.

本発明の他の目的は、中子自体に一対の刃を取り付けるための穴の形成や刃保持部の形成を必要とせず、コンセントに差し込む刃の根元部分に絶縁樹脂（ブレードキャップ）と中子を一体に成形するとともに、刃の下部部分を中子内部に成形により埋設させることができる構造の電源プラグを製造する方法を提供することにある。   Another object of the present invention is that it is not necessary to form a hole for attaching a pair of blades to the core itself or to form a blade holding portion, and an insulating resin (blade cap) and core are formed at the base of the blade to be inserted into the outlet. And a method of manufacturing a power plug having a structure in which the lower portion of the blade can be embedded in the core by molding.

本発明の電源プラグは、刃と、刃の根元部分を被覆する被覆部分と刃の下部部分および刃に接続されるコードの電線とを一体に成形して刃の下部部分および刃に接続されるコードの電線を埋設して保持する中子と、中子全体を埋設して保持するように成形されたプラグ本体と、を有することを特徴とする。   The power plug of the present invention is formed by integrally forming a blade, a covering portion that covers the root portion of the blade, a lower portion of the blade, and an electric wire of a cord connected to the blade, and is connected to the lower portion of the blade and the blade. It has the core which embeds and holds the electric wire of a cord, and the plug main part shape | molded so that the whole core may be embed | buried and hold | maintained, It is characterized by the above-mentioned.

なお、プラグ本体を中子全体を埋設して保持するように成形するのに代えて、中子の上面を露呈させて成形してもよい。   Instead of forming the plug body so as to hold the entire core embedded, the plug body may be formed by exposing the upper surface of the core.

本発明の電源プラグの製造方法は、刃とコードの電線を接続し、接続した刃およびコードを金型内に位置決めして配置して、射出成形により、刃の根元部分を被覆する被覆部分と刃の下部部分および刃に接続されるコードの電線とを一体に成形して、刃の下部部分および刃に接続されるコードの電線を埋設して保持する中子を形成し、中子を金型内に位置決めして配置して、射出成形により、中子全体を埋設して保持するプラグ本体を形成する、ことを特徴とする。   The method for manufacturing a power plug according to the present invention includes a covering portion that connects a blade and a cord electric wire, positions and connects the connected blade and cord in a mold, and covers a root portion of the blade by injection molding. The lower part of the blade and the electric wire of the cord connected to the blade are integrally formed to form a core that embeds and holds the lower part of the blade and the electric wire of the cord connected to the blade. The plug body is positioned and arranged in a mold, and a plug body for embedding and holding the entire core is formed by injection molding.

なお、プラグ本体を中子全体を埋設して保持するように成形するのに代えて、中子の上面を露呈させて成形してもよい。   Instead of forming the plug body so as to hold the entire core embedded, the plug body may be formed by exposing the upper surface of the core.

本発明によると、中子自体に一対の刃を取り付けるための穴の形成や刃保持部の形成を必要とせず、コンセントに差し込む刃の根元部分に絶縁樹脂（ブレードキャップ）と中子を一体に成形するとともに、刃の下部部分を中子内部に成形により埋設させることができる構造の電源プラグが得られる。   According to the present invention, it is not necessary to form a hole for attaching a pair of blades to the core itself or to form a blade holding part, and the insulating resin (blade cap) and the core are integrated with the base portion of the blade to be inserted into the outlet. A power plug having a structure in which the lower portion of the blade can be embedded in the core by molding is obtained.

また、中子自体に一対の刃を取り付けるための穴の形成や刃保持部の形成を必要とせず、コンセントに差し込む刃の根元部分に絶縁樹脂（ブレードキャップ）と中子を一体に成形するとともに、刃の下部部分を中子内部に成形により埋設させることができる構造の電源プラグを製造する方法が得られる。   In addition, it is not necessary to form a hole for attaching a pair of blades to the core itself or to form a blade holding part, and the insulating resin (blade cap) and the core are integrally formed at the base of the blade to be inserted into the outlet. A method of manufacturing a power plug having a structure in which the lower part of the blade can be embedded in the core by molding is obtained.

本発明の電源プラグでは、刃の根元部分を被覆する被覆部分と刃の下部部分および刃に接続されるコードの電線とを一体に成形して中子を成形する。その際、中子は刃の下部部分および刃に接続されるコードの電線を埋設して保持する。そして、プラグ本体を中子全体を埋設して保持するように成形する。なお、プラグ本体を中子全体を埋設して保持するように成形するのに代えて、中子の上面を露呈させて成形してもよい。   In the power plug of the present invention, the core is formed by integrally forming the covering portion covering the root portion of the blade, the lower portion of the blade, and the electric wire of the cord connected to the blade. At that time, the core embeds and holds the electric wire of the cord connected to the lower part of the blade and the blade. Then, the plug body is molded so as to hold the entire core embedded. Instead of forming the plug body so as to hold the entire core embedded, the plug body may be formed by exposing the upper surface of the core.

図１において、電源プラグ１０は、（１）一対の刃２と、（２）コード４と、（３）刃２の下部部分２ｂでコード４の電線４ａを接続する接続部分（カシメ部分）５と、（４）コンセントに差し込む刃２の根元部分２ａを被覆する被覆部分（ブレードキャップ）３ｂを射出成形により成形するとともに、刃２の下部部分２ｂ、カシメ部分５、電線４ａ、コード４の上部部分を埋設するように（内包するように）、射出成形により、被覆部分３ｂの成形と一体的に成形された中子本体３ａから成る中子（中押し）３と、さらに、（５）中子３を完全に埋設するように射出成形されたプラブ本体１と、を有する。   In FIG. 1, a power plug 10 includes (1) a pair of blades 2, (2) a cord 4, and (3) a connecting portion (caulking portion) 5 for connecting the electric wire 4a of the cord 4 with a lower portion 2b of the blade 2. (4) A covering portion (blade cap) 3b covering the root portion 2a of the blade 2 to be inserted into the outlet is formed by injection molding, and the lower portion 2b of the blade 2, the caulking portion 5, the electric wire 4a, and the upper portion of the cord 4 A core (core push) 3 composed of a core body 3a formed integrally with the molding of the covering portion 3b by injection molding so as to embed the part (enclose), and (5) the core And a main body 1 injection-molded to completely embed 3.

すなわち、本発明の中子３は被覆部分３ｂと、中子本体３ａ（刃の下部部分、カシメ部分、電線コードの上部部分）とを一体的に形成したものである。このため、中子３には、刃を取り付けるための穴を形成する必要はなく、また刃を保持する保持部も必要がない。   That is, the core 3 of the present invention is formed by integrally forming the covering portion 3b and the core main body 3a (the lower portion of the blade, the caulking portion, and the upper portion of the electric wire cord). For this reason, it is not necessary to form the hole for attaching a blade in the core 3, and the holding part holding a blade is also unnecessary.

中子３は、例えば、塩ビ等の硬質の樹脂から成形され、被覆部分３ｂの厚さは、例えば、０．１５〜０．５ｍｍである。図１ｄから明らかなように、成形された中子は凹凸のない平面や曲線面で成形されており、このため、その後に行われるプラグ本体の射出成形に対して不良がほとんど発生しないものである。   The core 3 is formed from, for example, a hard resin such as vinyl chloride, and the thickness of the covering portion 3b is, for example, 0.15 to 0.5 mm. As is apparent from FIG. 1d, the molded core is molded with a flat surface or a curved surface with no irregularities, and therefore, almost no defects occur with respect to the subsequent injection molding of the plug body. .

本発明の電源プラグの製造は下記のように行われる。
最初に、図１ｄに示すように、中子３が形成される。すなわち、刃２の下部部分２ｂの下端にカシメによってコード４の電線を接続し、コードと接続した刃２を金型内に位置決めして配置し、硬質の樹脂を注入して射出成形する。このとき、刃２の下部部分２ｂ、接続部分５、電線４ａ、コード４の上部を埋設するように中子本体３ａを成形するとともに、被覆樹脂３ｂも一体的に成形する。 The power plug of the present invention is manufactured as follows.
First, as shown in FIG. 1d, the core 3 is formed. That is, the electric wire of the cord 4 is connected to the lower end of the lower portion 2b of the blade 2 by caulking, the blade 2 connected to the cord is positioned and arranged in the mold, and a hard resin is injected and injection molded. At this time, the core body 3a is molded so as to embed the lower part 2b of the blade 2, the connection part 5, the electric wire 4a, and the upper part of the cord 4, and the coating resin 3b is also molded integrally.

その後、このように形成された中子３を金型内に入れ、軟質の樹脂、例えば、軟質塩ビ、軟質のポリエチレン系の樹脂、軟質のポリオレフィン系の樹脂等を注入して、図１ｃに示すように、中子３全体を埋設した状態でプラグ本体１を成形する。   Thereafter, the core 3 formed in this manner is placed in a mold, and a soft resin such as soft vinyl chloride, soft polyethylene-based resin, soft polyolefin-based resin, or the like is injected, as shown in FIG. 1c. Thus, the plug main body 1 is molded in a state where the entire core 3 is embedded.

図２において、電源プラグ１０は、（１）一対の刃２と、（２）コード４と、（３）刃２の下部部分２ｂでコード４の電線４ａを接続する接続部分（カシメ部分）５と、（４）コンセントに差し込む刃２の根元部分２ａを被覆する被覆部分（ブレードキャップ）３ｂを射出成形により成形するとともに、刃２の下部部分２ｂ、カシメ部分５、電線４ａ、コード４の上部部分を埋設するように（内包するように）、射出成形により、被覆部分３ｂの成形と一体的に成形された中子本体３ａから成る中子（中押し）３と、さらに、（５）中子の上面を露呈させて中子を埋設するように射出成形されたプラブ本体１と、を有する。   In FIG. 2, the power plug 10 includes (1) a pair of blades 2, (2) a cord 4, and (3) a connecting portion (caulking portion) 5 for connecting the electric wire 4 a of the cord 4 at the lower portion 2 b of the blade 2. (4) A covering portion (blade cap) 3b covering the root portion 2a of the blade 2 to be inserted into the outlet is formed by injection molding, and the lower portion 2b of the blade 2, the caulking portion 5, the electric wire 4a, and the upper portion of the cord 4 A core (core push) 3 composed of a core body 3a formed integrally with the molding of the covering portion 3b by injection molding so as to embed the part (enclose), and (5) the core A main body 1 which is injection-molded so as to embed the core by exposing the upper surface of the core.

すなわち、本発明の中子３は被覆部分３ｂと、中子本体３ａ（刃の下部部分、カシメ部分、電線コードの上部部分）とを一体的に形成したものである。このため、中子３には、刃を取り付けるための穴を形成する必要はなく、また刃を保持する保持部も必要がない。   That is, the core 3 of the present invention is formed by integrally forming the covering portion 3b and the core main body 3a (the lower portion of the blade, the caulking portion, and the upper portion of the electric wire cord). For this reason, it is not necessary to form the hole for attaching a blade in the core 3, and the holding part holding a blade is also unnecessary.

中子３は、例えば、塩ビ等の硬質の樹脂から成形され、被覆部分３ｂの厚さは、例えば、０．１５〜０．５ｍｍである。図２ｄから明らかなように、成形された中子は凹凸のない平面や曲線面で成形されており、このため、その後に行われるプラグ本体の射出成形に対して不良がほとんど発生しないものである。   The core 3 is formed from, for example, a hard resin such as vinyl chloride, and the thickness of the covering portion 3b is, for example, 0.15 to 0.5 mm. As is apparent from FIG. 2d, the molded core is molded with a flat surface or a curved surface with no irregularities, and therefore, almost no defects occur with respect to the subsequent injection molding of the plug body. .

本発明の電源プラグの製造は下記のように行われる。
最初に、図２ｄに示すように、中子３が形成される。すなわち、刃２の下部部分２ｂの下端にカシメによってコード４の電線を接続し、コードと接続した刃２を金型内に位置決めして配置し、硬質の樹脂を注入して射出成形する。このとき、刃２の下部部分２ｂ、接続部分５、電線４ａ、コード４の上部を埋設するように中子本体３ａを成形するとともに、被覆樹脂３ｂも一体的に成形する。 The power plug of the present invention is manufactured as follows.
First, as shown in FIG. 2d, the core 3 is formed. That is, the electric wire of the cord 4 is connected to the lower end of the lower portion 2b of the blade 2 by caulking, the blade 2 connected to the cord is positioned and arranged in the mold, and a hard resin is injected and injection molded. At this time, the core body 3a is molded so as to embed the lower part 2b of the blade 2, the connection part 5, the electric wire 4a, and the upper part of the cord 4, and the coating resin 3b is also molded integrally.

その後、このように形成された中子３を金型内に入れ、軟質の樹脂、例えば、軟質塩ビ、軟質のポリエチレン系の樹脂、軟質のポリオレフィン系の樹脂等を注入して、図２ｃに示すように、中子３の上面を露呈させて中子を埋設した状態でプラグ本体１を成形する。   Thereafter, the core 3 formed in this manner is put into a mold, and a soft resin such as soft vinyl chloride, soft polyethylene resin, soft polyolefin resin, or the like is injected, as shown in FIG. 2c. Thus, the plug main body 1 is molded in a state where the upper surface of the core 3 is exposed and the core is embedded.

本発明の実施例１の電源プラグを示す図であり、図1ａはその平面図であり、図１ｂはその側面図であり、図１ｃはその縦断面図であり、図1ｄは中子（中押し）の縦断面図である。（実施例１）BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the power plug of Example 1 of this invention, FIG. 1a is the top view, FIG. 1b is the side view, FIG. 1c is the longitudinal cross-sectional view, FIG. FIG. (Example 1) 本発明の実施例２の電源プラグを示す図であり、図２ａはその平面図であり、図２ｂはその側面図であり、図２ｃはその縦断面図であり、図２ｄは中子（中押し）の縦断面図である。（実施例２）It is a figure which shows the power plug of Example 2 of this invention, FIG. 2a is the top view, FIG. 2b is the side view, FIG. 2c is the longitudinal cross-sectional view, FIG. FIG. (Example 2)

１０ 電源プラグ
１ プラブ本体
２ 刃
２ａ 刃の根元部分
２ｂ 刃の下部部分
３ 中子
３ａ 中子本体
３ｂ 被覆樹脂
４ コード
４ａ 電線
５ 接続部分 10 power plug 1 plug body 2 blade 2a blade root portion 2b blade lower portion 3 core 3a core body 3b coating resin 4 cord 4a electric wire 5 connection portion

Claims (4)

刃と、
刃の根元部分を被覆する被覆部分と刃の下部部分および刃に接続されるコードの電線とを一体に成形して刃の下部部分および刃に接続されるコードの電線を埋設して保持する中子と、
中子全体を埋設して保持するように成形されたプラグ本体と、
を有することを特徴とする電源プラグ。 A blade,
The cover part that covers the base part of the blade, the lower part of the blade, and the electric wire of the cord connected to the blade are integrally formed, and the lower part of the blade and the electric wire of the cord connected to the blade are embedded and held With the child,
A plug body shaped to embed and hold the entire core;
A power plug characterized by comprising: 刃と、
刃の根元部分を被覆する被覆部分と刃の下部部分および刃に接続されるコードの電線とを一体に成形して刃の下部部分および刃に接続されるコードの電線を埋設して保持する中子と、
中子の上面だけを露呈させた状態で中子を保持するように成形されたプラグ本体と、
を有することを特徴とする電源プラグ。 A blade,
The cover part that covers the base part of the blade, the lower part of the blade, and the electric wire of the cord connected to the blade are integrally formed, and the lower part of the blade and the electric wire of the cord connected to the blade are embedded and held With the child,
A plug body shaped to hold the core with only the upper surface of the core exposed; and
A power plug characterized by comprising: 刃とコードの電線を接続し、
接続した刃およびコードを金型内に位置決めして配置して、射出成形により、刃の根元部分を被覆する被覆部分と刃の下部部分および刃に接続されるコードの電線とを一体に成形して、刃の下部部分および刃に接続されるコードの電線を埋設して保持する中子を形成し、
中子を金型内に位置決めして配置して、射出成形により、中子全体を埋設して保持するプラグ本体を形成する、
ことを特徴とする電源プラグの製造方法。 Connect the blade and cord wire,
The connected blade and cord are positioned and arranged in the mold, and the covering part that covers the root part of the blade and the lower part of the blade and the electric wire of the cord connected to the blade are integrally formed by injection molding. Forming a core that embeds and holds the electric wire of the cord connected to the lower part of the blade and the blade,
The core is positioned and arranged in the mold, and a plug body that embeds and holds the entire core is formed by injection molding.
A method for manufacturing a power plug. 刃とコードの電線を接続し、
接続した刃およびコードを金型内に位置決めして配置して、射出成形により、刃の根元部分を被覆する被覆部分と刃の下部部分および刃に接続されるコードの電線とを一体に成形して、刃の下部部分および刃に接続されるコードの電線を埋設して保持する中子を形成し、
中子を金型内に位置決めして配置して、射出成形により、中子の上面だけを露呈させた状態で中子を保持するように成形されたプラグ本体を形成する、
ことを特徴とする電源プラグの製造方法。 Connect the blade and cord wire,
The connected blade and cord are positioned and arranged in the mold, and the covering part that covers the root part of the blade and the lower part of the blade and the electric wire of the cord connected to the blade are integrally formed by injection molding. Forming a core that embeds and holds the electric wire of the cord connected to the lower part of the blade and the blade,
The core is positioned and arranged in the mold, and a plug body is formed by injection molding so as to hold the core with only the upper surface of the core exposed.
A method for manufacturing a power plug.
JP2009047592A 2009-03-02 2009-03-02 Power plug and method for manufacturing the same Pending JP2010205468A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4828985A (en) * 1971-04-28 1973-04-17
JPH0487279A (en) * 1990-07-30 1992-03-19 Mitsubishi Electric Home Appliance Co Ltd Insertion plug
JPH07335308A (en) * 1994-06-07 1995-12-22 Kyoto Densen Kk Plug for power supply
JPH09199212A (en) * 1996-01-23 1997-07-31 Sony Corp Power source plug
JP2000315540A (en) * 1999-05-06 2000-11-14 Fuji Densen Kogyo Kk Power cord
JP2001167838A (en) * 1999-12-08 2001-06-22 Fuji Densen Kogyo Kk Power cord and method of manufacturing the same
JP2006049223A (en) * 2004-08-06 2006-02-16 Nakano Denki Seisakusho:Kk Attachment plug
JP2008016288A (en) * 2006-07-05 2008-01-24 Fuji Densen Kogyo Kk Power source cord

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4828985A (en) * 1971-04-28 1973-04-17
JPH0487279A (en) * 1990-07-30 1992-03-19 Mitsubishi Electric Home Appliance Co Ltd Insertion plug
JPH07335308A (en) * 1994-06-07 1995-12-22 Kyoto Densen Kk Plug for power supply
JPH09199212A (en) * 1996-01-23 1997-07-31 Sony Corp Power source plug
JP2000315540A (en) * 1999-05-06 2000-11-14 Fuji Densen Kogyo Kk Power cord
JP2001167838A (en) * 1999-12-08 2001-06-22 Fuji Densen Kogyo Kk Power cord and method of manufacturing the same
JP2006049223A (en) * 2004-08-06 2006-02-16 Nakano Denki Seisakusho:Kk Attachment plug
JP2008016288A (en) * 2006-07-05 2008-01-24 Fuji Densen Kogyo Kk Power source cord

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