JP4906570B2 - Power plug, electric device having power plug, and method of manufacturing power plug - Google Patents

Description

  The present invention relates to a power plug for supplying power (electric power) to an electric device by being inserted into an outlet of a power outlet (socket: receptacle) such as a commercial power source. The present invention relates to a power plug that forms a filling member to prevent a tracking fire (a fire caused by a short circuit due to accumulation of dust or the like).

  Electrical equipment such as electrical appliances and OA (office automation) equipment includes a power plug that is plugged into a power outlet. In order that the connection terminal member of the power plug can be inserted into the insertion port of the power outlet, the outer dimension of the connection terminal member is slightly smaller than the inner diameter of the insertion port. Therefore, when the connection terminal member of the power plug is inserted into the outlet of the power outlet, dust or the like adheres to the gap between the connection terminal member of the power plug and the outlet of the power outlet, and thus an electrical short (short circuit), etc. Inconvenience may occur.

  In addition, since there is a gap in the connection terminal member of the power plug when it is inserted into the outlet of the power outlet, the power plug tends to rattle at the outlet, and the power plug is inclined with respect to the power outlet. It will be easy to come out from the insertion slot. For this reason, if the power cord of the power plug is accidentally hooked, the power plug can be easily pulled out from the insertion slot, and the power plug is unplugged particularly in office automation equipment that always requires power supply. If the power supply is cut off, the problem of internal data corruption occurs. In order to solve this problem, there is a “power plug” described in Japanese Patent Application No. 07-37388 filed earlier by the present applicant, and its outline will be described as first and second prior application examples.

  The power plug 1 of the first prior application example shown in FIG. 7 includes a plug body 3 and a pair of connection terminal members 4A and 4B inserted into the power plug insertion ports 9A and 9B of the power outlet 2 as shown in FIG. A power cord 5 connected to the electric device is provided.

  The plug body 3 is made of an insulating material having insulation properties such as plastic and synthetic rubber, and the outer shape of the plug body 3 is formed in a substantially rectangular shape. In the plug body 3, a pair of gap filling portions 6A and 6B are formed so as to project integrally when the plug body 3 is molded, on the abutting surface 3A of the power outlet 2 on the side to be inserted into the power plug connection ports 9A and 9B. .

  The gap filling portions 6A and 6B are formed in a rectangular tube shape, and the outer dimensions thereof are substantially equal to the inner diameter dimensions of the power plug connection ports 9A and 9B of the power outlet 2. As shown in FIG. 8, the gap filling portions 6A and 6B are provided with connection terminal insertion holes 7A and 7B having an inner diameter dimension substantially equal to the outer dimension of the connection terminal members 4A and 4B. Further, chamfered portions 8A and 8B are formed at the tip portions of the gap filling portions 6A and 6B, respectively.

  The connection terminal members 4A and 4B are formed of a metal plate, and the base end sides of the connection terminal members 4A and 4B are supported inside the plug body 3 as shown in FIG. 7, and are inserted into the insertion ports 9A and 9B of the power outlet 2. The connection terminal members 4A and 4B are attached to the plug body 3 so that the tip ends of the connection terminal members 4A and 4B on the side protrude from the connection terminal insertion holes 7A and 7B of the plug body 3 as shown in FIG. ing. Therefore, regarding the connection terminal members 4 </ b> A and 4 </ b> B, the outer peripheral wall of the root portion of the portion protruding from the plug main body 3 is covered with the inner peripheral wall of the gap filling portions 6 </ b> A and 6 </ b> B of the plug main body 3.

  The connection terminal members 4A and 4B of the power plug 1 configured as described above are inserted into the power plug insertion ports 9A and 9B of the power outlet 2, respectively. When inserted in this manner, the gaps 10A and 10B generated between the outer peripheral walls of the connection terminal members 4A and 4B of the power plug 1 and the inner peripheral walls of the power plug insertion ports 9A and 9B of the power outlet 2 are The gap filling portions 6A and 6B are filled. As a result, the gaps 10A and 10B disappear and dust and the like are prevented from entering, and the occurrence of rattling is prevented.

  In addition, in the power plug (not shown) of the second prior application example, by providing a gap filling cap (blade cap) separately from the plug body, the blade cap can be attached and detached. This prevents dust and the like from entering the gap.

  However, in the power plug 1 of the first prior application example shown in FIGS. 7 and 8, since the gap filling portions 6A and 6B are integrally formed of the same material as the plug body 3, for example, the plug body 3 When a material such as soft vinyl chloride is used to make the gap, the thickness of the gap filling portions 6A and 6B is so thin that when the gap filling portions 6A and 6B are inserted into the outlets 9A and 9B of the power outlet, There is a problem that the durability of the gap filling portions 6A and 6B is lowered.

  In the power plug of the second prior application of the prior application, a blade cap is provided separately so that it can be attached to and detached from the plug body. However, since the blade cap does not have means for connecting to the plug body, a force to push the plug body downward is applied, or when the blade cap is about to be detached, the inserted blade cap is not attached to the base of the plug body. The connection terminal members 4A and 4B are separated from the blade cap and dust or the like may enter the gap. In order to solve the above-mentioned problems, the present invention can provide a gap filling member having excellent durability for use even in a power plug made of a soft material. The purpose is to provide an enhanced power plug.

In the present invention, the above object is a power plug for electrical connection by being inserted into an outlet of a power outlet, and a plug formed to hold a power cord by a soft insulating material A plurality of electrical connection terminals that are electrically connected to the main body using a power cord and a caulking portion and are supported inside the plug main body, and the remaining portion protruding from the plug main body is inserted into the outlet of the power outlet The gap filling member which is arranged so as to cover each of the plurality of electrical connection terminals and is a separate member from the plug body for filling the gap between the electrical connection terminal and the inner surface forming the insertion port of the power outlet The gap filling member is formed in a rectangular tube shape with a resin material harder than the soft insulating material forming the plug body, and one end of the plug body The power plug that is inserted into, is achieved.

  In the present invention, the gap filling member fills the gap between the electrical connection terminal and the inner surface forming the insertion port of the power outlet. This gap filling member is a separate member from the plug body, and this gap filling member is fixed to the plug body by a fixing means. From this, the gap between the inner surface of the electrical connection terminal and the outlet of the power outlet can be reliably filled with the gap filling member, so that this gap can be eliminated. In addition, since the gap filling member is made of a resin material harder than the soft insulating material forming the plug body, it is excellent in durability for use. From the above, this power plug can prevent dust and the like from adhering to the power plug from being short-circuited. In addition, since the gap filling member can be securely fixed to the plug body by the fixing means, the gap filling member can be removed from the plug body even if the electrical connection terminal of the power plug is repeatedly inserted into the outlet of the power outlet. There is no such thing as dropping out.

In the present invention, the above object is formed so that a power cord is held by a soft insulating material in an electric device that is electrically connected by inserting a power plug into an outlet of a power outlet. Multiple electrical connections that are electrically connected to the plug body, part of which is electrically connected using the power cord and caulking part and supported inside the plug body, and the remaining part protruding from the plug body is inserted into the outlet of the power outlet A gap that is arranged to cover each of the terminals and the plurality of electrical connection terminals, and is a separate member from the plug body for filling the gap between the electrical connection terminals and the inner surface forming the outlet of the power outlet And the gap filling member is formed in a rectangular tube shape with a resin material harder than the soft insulating material forming the plug body, and one end is By that electrical equipment having a power plug that is inserted into the lug body, it is achieved.

  In the present invention, when the power plug is inserted into the outlet of the power outlet and electrically connected to the electrical equipment to take power, the gap filling member forms the electrical connection terminal and the outlet of the power outlet. The gap between the inner surface is filled. The gap filling member is a separate member from the plaque body, and the gap filling member is fixed to the plug body by a fixing means. From this, the gap between the inner surface of the electrical connection terminal and the outlet of the power outlet can be reliably filled with the gap filling member, so that this gap can be eliminated. In addition, since the gap filling member is made of a resin material harder than the soft insulating material forming the plug body, it is excellent in durability for use. From the above, in this electrical apparatus, it is possible to prevent the power plug from being short-circuited due to dust or the like. In addition, since the gap filling member can be securely fixed to the plug body by the fixing means, the gap filling member can be removed from the plug body even if the electrical connection terminal of the power plug is repeatedly inserted into the outlet of the power outlet. There is no such thing as dropping out.

In the present invention, the above object is a method of manufacturing a power plug for electrical connection by inserting a plurality of electrical connection terminals into an outlet of a power outlet. A gap filling member for filling the gap with the inner surface forming the insertion port is formed into a rectangular cylinder with a resin material harder than the soft insulating material forming the plug body of the power plug, and a plurality of electrical connections A gap filling member is disposed so as to cover each of the terminals, and a part of the plurality of electrical connection terminals and the power cord are electrically connected using a caulking portion, and the plurality of electrical connection terminals and the gap are made of a soft insulating material. integrally molded plug body so as to hold the power cord to support the filling member, one end of the gap-filling member to the manufacturing method of the inserted have that power plug into the plug body Ri, is achieved.

  In the present invention, a resin material that is harder than the soft insulating material that forms the plug body of the power plug is used as the gap filling member in order to fill the gap between the plurality of electrical connection terminals and the inner surface forming the insertion port of the power outlet. And the gap filling members are respectively inserted into the plurality of electrical connection terminals. Thereafter, the plug body is molded with respect to the electrical connection terminal and the gap filling member. Accordingly, since the plug body and the gap filling member are separate members, even if the plug body is made of a relatively soft material, the gap filling member is made of a material having excellent durability regardless of the plug body. , Can fill the gap. As a result, it is possible to prevent a short circuit due to dust of the power plug, and to improve the durability of use.

  According to the present invention, even in a power plug made of a soft material, a gap filling member having excellent use durability can be provided, and this gap filling member can be prevented from falling off and safety can be improved.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.

Embodiment 1
A first embodiment of the power plug of the present invention will be described with reference to FIG. 1 and FIG. FIG. 1 is a view having a cross section showing a power plug, and FIG. 2 is a perspective view of the power plug and a power outlet.

  A power plug 11 shown in FIGS. 1 and 2 includes a plug body 13, a pair of connection terminal members 4A and 4B to be inserted into the insertion openings 9A and 9B of the power outlet 2, blade caps (gap filling members) 12A and 12B, and electrical equipment. And a crimping portion 14 for connecting the power cord 5 and the connection terminal members 4A and 4B. As the power outlet 2, a conventionally used power outlet can be adopted, and the same power outlet 2 as described with reference to FIGS. 7 and 8 can be adopted.

  The plug main body 13 is made of an insulating material, for example, plastic, preferably polyvinyl chloride material (PVC), and the external shape of the plug main body 13 is formed in a rectangular shape when viewed in cross section. The plug body 13 has an abutting surface 13A, and a pair of connection terminal members 4A and 4B project from the abutting surface 13A. The pair of connection terminal members 4 </ b> A and 4 </ b> B are formed of a metal plate, and parts 4 </ b> C and 4 </ b> D of the connection terminal members 4 </ b> A and 4 </ b> B are firmly supported inside the plug body 13. Portions 4C and 4D of the connection terminal members 4A and 4B are electrically connected to the wires 5a and 5a of the power cord 5 by using, for example, metal caulking portions 14 and 14, respectively. On the other hand, the remaining portions 4E and 4F of the connection terminal members 4A and 4B protrude from the abutting surface 13A of the plug body 13 as described above.

  Next, the blade caps 12A and 12B will be described. The blade caps 12A and 12B are members that fill and close gaps formed between the insertion openings 9A and 9B of the power outlet 2 and the remaining portions 4E and 4F of the connection terminal members 4A and 4B. The blade caps 12A and 12B are formed of a material different from that of the plug body 13, for example, polystyrene (PS). The blade caps 12 </ b> A and 12 </ b> B formed of polystyrene (PS) are harder materials than the polyvinyl chloride forming the plug body 13.

  As a result, even if the remaining portions 4E and 4F of the connection terminal members 4A and 4B are filled in the gaps generated when they are inserted into the insertion ports 9A and 9B of the power outlet 2 in FIG. 2, the durability of the blade caps 12A and 12B is used. Can be improved. These blade caps 12A and 12B are formed, for example, in a quadrangular shape and a cylindrical shape when viewed in cross section, and have a connection terminal member having an inner diameter dimension substantially equal to the outer dimension of the intermediate portion of the connection terminal members 4A and 4B. Insertion holes 15A, 15B are formed.

  Chamfered portions 8A and 8B are formed at the tip portions of the blade caps 12A and 12B, respectively. The chamfered portions 8A and 8B are formed in this way so that the blade caps 12A and 12B can be smoothly inserted into the insertion ports 9A and 9B of the power outlet 2, and when the blade caps 12A and 12B are inserted. This is to prevent damage. As shown in FIGS. 1 and 2, the outer peripheral walls of the intermediate portions of the remaining portions 4E and 4F of the connection terminal members 4A and 4B are inserted into the connection terminal members 4A and 4B, and the inner periphery of the blade caps 12A and 12B. Covered by a surface.

  The power outlet 2 of FIG. 2 has the two insertion openings 9A and 9B as described above, and these insertion openings 9A and 9B are connected to, for example, a commercial power supply 9E via power lines 9C and 9D. . As this commercial power source, for example, an AC power source having a predetermined voltage is used.

  Next, a method for manufacturing the power plug described above will be described. The blade caps 12A and 12B are fitted into the intermediate portions of the connection terminal members 4A and 4B, respectively. 5 are connected to the respective lines 5a and 5a. In this state, by pouring a resin such as a polyvinyl chloride material forming the plug body 13 into the mold, the connection terminal members 4A and 4B and the blade caps 12A and 12B are fixed and integrated with the plug body 13. . That is, when the power plug 13 is molded with a mold, the fixing portions 13E and 13E of the power plug 13 serve as fixing means for the connection terminal members 4A and 4B and the blade caps 12A and 12B. Thus, by disposing the blade caps 12A and 12B as gap filling means on the connection terminal members 4A and 4B, it is possible to prevent dust and the like from entering the power outlet 2 and to improve the safety and reliability of use. Thus, the power plug 11 is completed.

  The connection terminal members 4A and 4B of the power plug 11 made as described above can be easily inserted into the insertion ports 9A and 9B of the power outlet 2 described above. Then, blade caps 12A and 12B are filled in gaps formed between the outer peripheral walls of the connection terminal members 4A and 4B and the inner peripheral walls of the power plug insertion ports 9A and 9B that are generated when the plugs are inserted. This prevents dust and the like from entering the gap formed between the outer peripheral walls of the connection terminal members 4A and 4B and the inner peripheral walls of the insertion openings 9A and 9B of the power plug 2, and also prevents the power plug 11 from being connected to the power outlet 2. Reduces the occurrence of rattling. Therefore, the power plug 11 is extremely safe to use, and can supply power (electric power) to the electric device 100 to which one end of the power cord 5 is connected.

Embodiment 2
Next, the configuration of the power plug according to the second embodiment of the present invention will be described with reference to FIGS. 3 is a view showing the power plug 21, FIG. 4 is a perspective view of the blade caps 22A and 22B inserted into the power plug 21, and FIGS. 5 and 6 are inserted into the power plug. It is the front view and side view of blade cap 22A, 22B.

  As shown in FIG. 3, the power plug 21 has an insulating plug body 23, a pair of connection terminal members 4A and 4B, and blade caps (gap filling members) 22A and 22B. The blade caps 22A and 22B are inserted into the root portions of the connecting terminal members 4A and 4B protruding from the abutting surface 23A of the plug body 23 as a feature of the second embodiment, and the abutting surface 23A of the plug body 23 is inserted. Can be glued.

  The blade caps 22A and 22B shown in FIGS. 4 to 6 are formed of an insulating material such as a resin, and have connection terminal member insertion holes 25 for insertion into the connection terminal members 4A and 4B. The blade caps 22 </ b> A and 22 </ b> B each have a flange 24 as a fixing means on the abutting surface 23 </ b> A side of the plug body 23. The collar 24 is provided with an adhesive paper 26 and a release paper 27 for attaching the blade caps 22 </ b> A and 22 </ b> B to the plug body 23. Chamfered portions 8A and 8B are formed at the tip ends of the blade caps 22A and 22B to facilitate insertion into the insertion ports 9A and 9B of the power outlet 2 as shown in FIG.

  Next, a method for manufacturing the power plug 21 according to the second embodiment of the present invention will be described with reference to FIGS. Adhesive paper 26 to which release paper 27 is attached is attached in advance to the flanges 24 of the blade caps 22A and 22B. In actual use of the blade caps 22A and 22B of the present invention, the release paper 27 is peeled off, and the blade caps 22A and 22B are inserted to the connection terminal members 4A and 4B together with the connection terminal insertion holes 25, The adhesive paper 26 is used to affix the plug body 23 to the abutting surface 23A.

  When the power plug 21 configured as described above is used, the outer peripheral portions of the blade caps 22A and 22B of the present invention enter the insertion ports 9A and 9B of the power plug of the counterpart power outlet 2 as shown in FIG. Further, since the blade caps 22A and 22B of the present invention are made of an insulating material, even if the power plug 21 is slightly disconnected from the insertion ports 9A and 9B of the power outlet 2, the connection can be made. The terminal members 4A and 4B are not exposed.

  This prevents dust and the like from entering a gap formed between the outer peripheral walls of the connection terminal members 4A and 4B and the inner peripheral wall of the power plug insertion port, and prevents the power plug 21 from rattling with respect to the power outlet 2. To prevent. Therefore, the power plug 21 has high safety and can reliably supply power (electric power) to the electric device 100. In addition, although the adhesive paper 26 was illustrated and demonstrated as a method of connecting the blade caps 22A and 22B to the plug body 23, another connecting means for applying an adhesive or the like instead of an adhesive sheet such as adhesive paper is also applied. Is possible.

  In the embodiment of the present invention, it is possible to prevent a short circuit or a tracking fire that occurs due to adhesion of dust or the like to the connection terminal member. Even if the plug body is formed of a soft material, the blade cap (gap filling member) can be formed of a different and hard material, and the use durability of the power plug can be improved.

  In the second embodiment shown in FIG. 3, the blade cap can be inserted later into a normal power plug, and safety measures can be taken for the power plug already in use. Since the blade cap of the present invention is fixed to the plug body with adhesive paper or adhesive, even if a user such as an infant accidentally touches the root of the power plug, the conductive portion of the connection terminal member is not exposed. Due to the structure, it is possible to prevent an electric shock accident and the like.

  By the way, this invention is not limited to the above-mentioned embodiment, Various embodiment can be employ | adopted. For example, in the above-described embodiment, the power plug is exemplified. However, the power plug can be used for any electric device 100 using the power plug of the present invention, and of course, an AC / DC (DC-AC conversion) adapter, a table tap, etc. It is possible to apply to the power plug provided with the connection terminal member. The present invention also includes the concept of a power plug having one or three or more connecting terminal members, not limited to two. Needless to say, the present invention can be applied as appropriate without departing from the gist of the present invention.

The figure which shows Embodiment 1 of the power plug of this invention. The perspective view of the power plug and power outlet of FIG. The figure which shows Embodiment 2 of the power plug of this invention. The rear perspective view of the blade cap inserted in the power plug of FIG. The front view of the blade cap inserted in the power plug. The side view of a blade cap. The figure which shows the conventional power plug. The front view of the conventional power plug.

Explanation of symbols

  2 ... Power outlet, 3,13,23 ... Plug body, 4A, 4B ... Connection terminal member (electrical connection terminal member), 5 ... Power cord, 6A, 6B ... Gap filling portion, 9A, 9B ... Inlet, 11 ... Power plug, 12A, 12B, 22A, 22B ... Blade cap (gap filling member), 13E ... Fixing part (fixing means), 14 ... Caulking part, 15A, 15B, 25 ... Insertion hole of connecting terminal member, 21 ... Power plug 24 ... Brim 26 ... Adhesive paper 27 ... Release paper

Claims (4)

It is a power plug for electrical connection by plugging into the outlet of the power outlet,
A plug body formed to hold the power cord by a soft insulating material;
A plurality of electrical connection terminals, a part of which is electrically connected using the power cord and a caulking part and supported inside the plug body, and a remaining part protruding from the plug body is inserted into an insertion port of the power outlet When,
The plug main body is a member separate from the plug main body, which is disposed so as to cover each of the plurality of electrical connection terminals, and fills a gap between the electrical connection terminal and an inner surface forming an insertion port of the power outlet. A gap filling member;
With
The gap-filling member, the plug the hard resin material than the insulating material of the softer is formed in a square tubular shape with one end the plug inserted though that power plug in the body to form the body. The gap-filling member, the power plug, wherein the plug body and 請 Motomeko 1 that will be integrally molded in a state of covering the predetermined position of the electrical connection terminals. In electrical equipment that is connected electrically by inserting the power plug into the outlet of the power outlet and takes power,
A plug body formed to hold the power cord by a soft insulating material;
A plurality of electrical connection terminals, a part of which is electrically connected using the power cord and a caulking part and supported inside the plug body, and a remaining part protruding from the plug body is inserted into an insertion port of the power outlet When,
The plug main body is a member separate from the plug main body, which is disposed so as to cover each of the plurality of electrical connection terminals, and fills a gap between the electrical connection terminal and an inner surface forming an insertion port of the power outlet. A gap filling member;
With
The gap-filling member, the is formed in a rectangular cylindrical shape by a hard resin material than the insulating material of the soft forming a plug body, that have a power plug at one end is inserted into the plug body electrical equipment. A method of manufacturing a power plug for electrical connection by inserting a plurality of electrical connection terminals into the outlet of a power outlet,
The gap filling member for filling the gap between the electrical connection terminal and the inner surface forming the insertion port of the power outlet is a rectangular resin resin material harder than the soft insulating material forming the plug body of the power plug. Formed into a cylindrical shape,
The gap filling member is disposed so as to cover each of the plurality of electrical connection terminals, and a part of the plurality of electrical connection terminals and a power cord are electrically connected using a caulking portion ,
So as to hold the power cord to support the said gap-filling member with the plurality of electrical connection terminals of an insulating material of the soft integrally molding the plug body, the one end is the plug body of the gap-filling member inserted have that power plug manufacturing method.

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