JPH09274959A - Power source plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent any shorting due to adhesion of dust or the like when a connecting terminal is inserted into a plug connecting port by forming a gap filling portion made of an insulating material around the connecting terminal by a coating treatment or the like. SOLUTION: Gap filling portions 5A, 5B made of an insulating material are formed around connecting terminals 4A, 4B at the center, respectively. Each thickness of the gap filling portions 5A, 5B is made approximately equal to an inner diameter of a plug connecting port of a power source receptacle. Furthermore, the gap filling portions 5A, 5B are made to project by a predetermined length L from an abutting face 7 of a plug 3, and the residual portions are contained and held inside the plug 3. Moreover, caulking portions 11A, 11B are formed at the base ends of the connecting terminals 4A, 4B, respectively. A power source cord 6 is connected by caulking, to be held inside the plug 3. Consequently, when the connecting terminal is inserted into the plug connecting port of the receptacle, gap filling means is filled in the gap formed between the outer periphery of the connecting terminal and the inner circumferential wall of the plug connecting port, thus preventing any shorting due to adhesion of dust or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power plug which is plugged into a power outlet to supply electric power to electric equipment.

[0002]

2. Description of the Related Art For electrical equipment such as electric appliances and office automation equipment,
It has a power plug that plugs into a power outlet. The power plug 101 includes a plug body 103 and a power outlet 10 as shown in FIGS.
A pair of connection terminals 104 (104A, 104B) inserted into the second plug connection port 106 (106A, 106B)
And a power cord 105 connected to the electric device side.

The plug body 103 is made of an insulating material having an insulating property, such as plastic or synthetic rubber, and is formed into a substantially rectangular shape. The connection terminal 104 is formed of a slightly elongated metal plate, has its base end side supported inside the plug body 103, and is attached to the plug body 103 in a state in which a tip portion thereof protrudes from the plug body 103. The tip of the connection terminal 104 has a power outlet 102.
Is inserted into the plug connection port 106 of.

The power cord 105 has a plug body 1 at one end.
03 is connected to the abutting surface 103A provided with the connecting terminal 104 and is guided to the inside of the plug body 103 from the other side surface 103B to be electrically connected to the connecting terminal 104, and the other end is connected to an electric device such as an electric appliance (not shown). Has been done.

The power plug 101 configured as described above
Is inserted into the plug connection port 106 of the power outlet 102, so that the power cord 10
The electric power is supplied to electric appliances such as electric appliances to which 5 is connected.

[0006]

By the way, in the above-mentioned conventional power supply plug 101, the external dimensions of the plug connection port 106 are such that the connection terminal 104 can be inserted into the plug connection port 106 of the power outlet 102. It is slightly smaller than the opening size. Therefore, when the power plug 101 is inserted into the power outlet 102, as shown in FIG. 6, a gap 107 (107A) is formed between the outer peripheral portion of the connection terminal 104 and the inner peripheral wall of the plug connection port 106 of the power outlet 102. , 107B) occurs. In the power plug 101, dust or the like adheres to the gap 107,
There is a possibility that inconveniences such as a short circuit may occur due to the dust and the like becoming moist.

The power plug 101 has a connection terminal 10
4 and the plug connection port 10 of the power outlet 102
Since the gap 107 is formed between the inner peripheral wall 6 and the inner peripheral wall 6, the plug body 103 is inclined, and the plug body 103 is inclined with respect to the power outlet, and is easily pulled out from the plug connection port 106. For this reason, in the conventional power plug 101, when the power cord 105 is accidentally caught on the power cord 105, the power plug 101 is easily disconnected from the power outlet 102. In particular, in an OA device or the like that requires constant power supply, the power is not supplied. The blocking causes a problem that internal data is damaged.

Therefore, according to the present invention, a gap is not substantially formed between the outer peripheral portion of the connection terminal and the inner peripheral wall of the plug connection port of the power outlet to prevent a short circuit and the connection terminal is connected to the power outlet. The purpose is to provide a power plug that is firmly connected.

[0009]

A power plug according to the present invention, which has achieved this object, has a plug main body formed of an insulating material, and a base end portion of the plug main body supported inside the plug main body. At least a pair of connections in which a gap filling portion is formed by integrally coating an insulating material on the surface of the plug body, the end portion of which is projected and exposed to the outside, and which is exposed from the inside to the outside of the plug body. And a terminal.

In the power plug according to the present invention having the above-described structure, when the connection terminal is inserted into the plug connection port of the power outlet, the gap filling portion has the inner periphery of the connection terminal and the plug connection port. The gap formed between the peripheral wall and the peripheral wall is filled. The gap filling portion prevents dust and the like from adhering between the connection terminal and the plug connection port, and also prevents rattling.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A power plug 1 to which the present invention is applied will be described below in detail with reference to the drawings. As shown in FIGS. 1 to 3, the power plug 1 includes a plug body 3
And a plug connection port 9 (9A, 9B) of the power outlet 2
It is provided with a pair of connection terminals 4 (4A, 4B) to be plugged in, and a power cord 6 connected to an electric device or the like.

As shown in FIG. 2, the plug body 3 is formed of an insulating material having an insulating property such as plastic or synthetic rubber, and has an outer shape of a substantially pentagonal shape.
The proximal ends of the pair of connection terminals 4 and a part of the power cord 6, which will be described in detail later, are held. The plug body 3 has an abutting surface 7 formed on the side to be inserted into the power outlet 2, and the tip ends of the pair of connection terminals 4 project from the abutting surface 7. Further, in the plug body 3, the opposite side of the abutting surface 7 has a narrowed shape, and the power cord 6 is pulled out from the side surface 8.

The connection terminal 4 is a horizontally long plate-like body, and its base end side is supported inside the plug body 3.
On the other hand, the tip end side, which is the side to be inserted into the power outlet 2, is attached to the plug body 3 so as to project from the abutting surface 7 of the plug body 3. The connection terminal 4 is formed into a predetermined shape by pressing a metal plate such as copper (Cu), and the surface thereof is plated for rust prevention.

In these connection terminals 4, as shown in FIGS. 2 and 3, the gap filling portion 5 (5
A, 5B) are formed. The gap filling portion 5 is formed of an insulating material, and is formed integrally with the connection terminal 4 by, for example, coating the surface of the connection terminal 4, painting, or outsert molding the connection terminal 4. It The gap filling portion 5 is formed so that its thickness is substantially equal to the internal dimension of the plug connection port 9 of the power outlet 2. The connection terminal 4 is, as shown in FIG.
A portion of the gap filling portion 5 having a predetermined width L projects from the abutting surface 7 of the plug body 3, and the remaining portion is housed in the plug body 3 and held by the plug body 3.

Further, in the connection terminal 4, a caulking portion 11 (11A, 11B) is formed on the base end side thereof,
The electric wire of the power cord 6 and the connection terminal are connected by caulking. One end of the power cord 6 is connected to the crimp portion 11 of the connection terminal 4 and is held inside the plug body 3. The power cord 6 is exposed from the side surface 8 to the outside of the plug body 3, and the other end side is connected to an electric device such as an electric appliance (not shown).

The power plug 1 configured as described above is
When the connection terminal 4 is inserted into the plug connection port 9 of the power outlet 2, as shown in FIGS. 1 and 4, the outer peripheral portion of the connection terminal 4 of the power plug 1 and the inner peripheral wall of the plug connection port 9 of the power outlet 2 Gap 10 (10A, 10A, 10
B) is filled with the gap filling portion 5.

Therefore, the power plug 1 prevents dust and the like from entering the gap 10 and prevents rattling while it is inserted into the power outlet 2. Therefore, the power plug 1 is extremely safe, and the connection state to the power outlet 2 is reliably maintained,
The plug connection port 9 does not easily come off. Therefore, the power plug 1 reliably supplies electric power to electric equipment such as an electric appliance to which one end of the power cord 6 is connected.

Also, in the power plug 1, as shown in FIG. 4, when the connection terminal 4 is inserted into the plug connection port 9 of the power outlet 2, the gap filling portion 5 and the outer peripheral portion of the connection terminal 4 and the plug. Gap 1 between the inner wall of the connection port 9
Since 0 is not configured, it is possible to prevent dust and the like from adhering to this portion. Therefore, in the power plug 1, the occurrence of a short circuit caused by the adhering dust carrying moisture is prevented, and the connection terminal 4 is firmly connected to the plug connection port 9.

In the power plug 1, a synthetic resin is used as the plug body 3 and is integrally formed with the connection terminal 4, the gap filling portion 5, the power cord 6 and the like.
The present invention is not limited to this. For example, the plug body 3 may be an assembly type made of hard plastic, and the connection terminal 4 having the gap filling portion 5 and the power cord 6 may be incorporated therein. Of course, the present invention can be applied to all kinds of plug bodies in the present invention.

[0020]

As described in detail above, according to the power plug of the present invention, the connection terminal is provided with the power outlet by providing the gap filling means at the root portion of the portion of the connection terminal protruding from the plug body. When it is inserted into the plug connection port, the gap filling means fills the gap between the outer peripheral portion of the connection terminal and the inner peripheral wall of the plug connection port.
It is possible to prevent dust and the like from adhering to the connection terminal and to prevent a short circuit, and the connection terminal is firmly connected to the plug connection port.

Further, since the power plug according to the present invention can be applied to all kinds of plug bodies, it can be manufactured without modifying the conventional production equipment, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a power plug according to the present invention.

FIG. 2 is a horizontal sectional view showing a power plug according to the present invention.

FIG. 3 is a partially cutaway side view of the power plug.

FIG. 4 is a longitudinal sectional view of an essential part showing a state in which the power plug is inserted into a power outlet.

FIG. 5 is a perspective view showing a conventional power plug.

FIG. 6 is a perspective view showing a state in which a conventional power plug is inserted into a power outlet.

[Explanation of symbols]

1 power plug, 3 plug body, 4 (4A, 4B)
Connection terminal, 5 (5A, 5B) Gap filling part, 6 power outlet

Claims (2)

[Claims] 1. A plug main body made of an insulating material, and a base end portion of the plug main body is supported inside the plug main body and the other end portion of the plug main body is exposed and exposed from the inside of the plug main body. On the surface over the root part exposed to the outside,
It is composed of at least a pair of connection terminals in which a gap filling portion is formed by integrally coating an insulating material, and the gap filling portion of the connection terminal is in a state in which the connection terminal is inserted into a plug connection port of a power outlet. In the power plug, the gap formed between the outer peripheral portion of the connection terminal and the inner peripheral wall of the plug connection port is filled. 2. The power plug according to claim 1, wherein the plug body and the connection terminal are integrally formed with a cord connected to a base end portion of the connection terminal.