JPH062572U - Power plug device - Google Patents

Abstract

(57) [Summary] [Purpose] By securely fixing the power plug pin to the mounted part, it is possible to reliably prevent failure due to disconnection. [Structure] The power supply plug pins 4x and 4y are mounted in the fitting grooves 3x and 3y provided in the mounted portion 2. The mounted portion 2 is made of a thermoplastic resin, and the power supply plug pins 4x, 4y are closed at positions adjacent to the fitting grooves 3x, 3y in the mounted portion 2 by thermoplastic deformation. The fixing piece portions 5xi, 5xj, 5yi, and 5yj for fixing are formed in a protruding manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an embedded power plug device integrally provided in an electric device such as an AC adapter.

[0002]

[Prior art]

 Generally, in electrical equipment such as AC adapters with embedded power plug devices, a fitting groove is provided in the housing (attached part), and the power plug pin is mounted in this fitting groove, and the The lead wire of the component is connected to the connection terminal formed on the rear end of the power plug pin. Therefore, in this type of power plug device, if the power plug pin installed in the mating groove is loose, the power plug pin becomes unstable during assembly, especially during the lead wire winding process, deteriorating workability and assembly. At the same time, after assembly, that is, during use of the product, the lead wire may break and cause malfunctions.Therefore, securely fix the power plug pin to the housing without rattling. There is a need to.

For this reason, conventionally, as disclosed in Japanese Utility Model Laid-Open No. 60-90778, a boss portion that bulges out in a circular shape is provided on the surface of a plug blade (power plug pin), and is fitted in a fitting groove of a housing. The blade was fixed by pressing it against.

[0004]

[Problems to be solved by the device]

 However, since the above-mentioned conventional fixing means is fixed only by pressure contact with the boss, it can be temporarily fixed to some extent during assembly, so stability is secured, but external pressure applied during product use after assembly is maintained. Since it also becomes considerably large, it is not enough to prevent rattling, and eventually there is a problem that the lead wire connected to the power plug pin is easily broken.

The present invention solves the problems existing in such conventional techniques, and by fixing the power plug pin to the mounted portion without backlash, a power plug capable of reliably preventing a failure due to disconnection. The purpose is to provide a device.

[0006]

[Means for Solving the Problems]

 In the present invention, when the power plug device 1 is configured by mounting the power plug pins 4x, 4y in the fitting grooves 3x, 3y provided in the mounted portion 2, particularly, the mounted portion 2 is formed of a thermoplastic resin. Along with the fitting grooves 3x and 3y in the mounted portion 2, fixing pieces 5xi and 5xj for fixing the power plug pins 4x and 4y by closing the fitting grooves 3x and 3y by thermoplastic deformation. It is characterized in that 5yi and 5yj are formed to project.

In this case, it is desirable to provide a pair of fixing piece portions 5xi, 5xj ... On both sides of the fitting groove 3x. Further, projection pieces 6x, 6y can be formed so as to project on the rear end sides 4xr, 4yr of the power plug pins 4x, 4y, and the projection pieces 6x ... Are preferably formed in a sawtooth shape.

[0008]

[Action]

 According to the power plug device 1 according to the present invention, the power plug pins 4x ... Are mounted by being inserted into the fitting grooves 3x.

Further, since a pair of fixing piece portions 5xi, 5xj ... Made of thermoplastic resin are formed to project at positions adjacent to the fitting grooves 3x ... In the mounted portion 2, the power plug pins 4x. When the fixing pieces 5xi, 5xj ... Are thermoplastically deformed by being heated and pressed after being mounted in the fitting grooves 3x, the fitting grooves 3x ... Are closed by the deformation of the fixing pieces 5xi, 5xj. At the same time, the power plug pins 4x ... Are fixed by the deformed fixing pieces 5xi, 5xj.

On the other hand, the projecting pieces 6x are integrally formed on the rear end sides 4xr of the power plug pins 4x and the projecting pieces 6x are formed in a sawtooth shape, so that the power plug pins 4x are fitted in the fitting grooves 3x. When mounted on, the projecting pieces 6x are locked to the inner wall of the fitting groove 3x, and are more firmly fixed together with the fixing by the fixing pieces 5xi, 5xj. In particular, since the projecting pieces 6x are provided on the rear end sides 4xr of the power plug pins 4x separated from the fixing pieces 5xi, 5xj, more stable fixing strength can be obtained by fixing the two separated points. To be

[0011]

【Example】

 Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, the configuration of each part of the power plug device 1 according to the present invention will be described with reference to FIGS. 1 to 3.

Reference numeral 2h denotes, for example, a housing (attached part 2) of an electric device such as an AC adapter, and the power plug device 1 according to the present invention is configured as an embedded type integrally provided in such an electric device. To be done.

The housing 2h is formed of a thermoplastic resin and, as shown in FIG. 3, is provided with a pair of L-shaped fitting grooves 3x and 3y. The fitting grooves 3x and 3y are opened on the one end face 2hf of the housing 2h. Further, fixing piece portions 5xi, 5xj, 5yi, 5yj extending from the one end face 2hf along the fitting grooves 3x, 3y are formed at positions adjacent to the fitting grooves 3x, 3y in the housing 2h, respectively. The pair of fixing pieces 5xi and 5xj on the fitting groove 3x side (the same on the 3y side) are provided facing each other so as to sandwich the fitting groove 3x, and each fixing piece 5xi and 5xj is a rectangular parallelepiped with respect to the housing 2h. Form into one.

On the other hand, 4x and 4y are power plug pins, which are integrally formed of a conductive metal material. The power plug pin 4x is formed by bending an elongated plate material into an L shape, one end of which is formed into a known power plug pin (plug blade) shape, and a protruding piece 6x is integrally formed on the rear end side 4xr. The projecting piece 6x has a sawtooth shape (right-angled triangle). In addition, a connection terminal 11x that can be connected by entwining a lead wire of a circuit component such as a power transformer is integrally formed on the rear portion of the power plug pin 4x. The other power plug pin 4y is formed in exactly the same manner except that it is symmetrical with respect to the power plug pin 4x. In the power plug pin 4y, 4yr is a rear end side, 6y is a protruding piece portion, and 11y is a connection terminal.

Next, a method of manufacturing the power plug device 1 according to the present invention will be described with reference to FIGS.

First, when the power plug pins 4x ... Are manufactured, as shown in FIG. 4, a plurality of power plug pin materials 4o ... In this case, the projecting pieces 6x can be formed by punching the rear end side of the power plug pin material 4o. Then, the punched power plug pin members 4o ... Are bent into an L shape to manufacture the power plug pins 4x. At this time, the projecting pieces 6x are bent such that their inclined sides are positioned in the insertion direction into the fitting groove 3x, and a pair of power plug pins 4x, 4y, which are bent in a symmetrical shape, are prepared. To do.

On the other hand, as shown in FIG. 3, the power plug pins 4x ... Are inserted (press-fitted) into the fitting grooves 3x. As a result, the serrated protrusions 6x ... Are locked to the inner walls of the fitting grooves 3x.

Then, as shown in FIG. 2, a heating jig 23 having a curved surface 22 having a semicircular cross section, which is heated by a heater 21, is pressed from above onto the fixing pieces 5xi, 5xj. , The fixing pieces 5xi, 5xj ... Are thermoplastically deformed into a semicircular cross section as shown in FIG. As a result, the fitting grooves 3x, 3y are closed, and at the same time, the power plug pins 4x ... Are fixed by the deformed fixing pieces 5xi, 5xj.

As described above, since the two separated points are fixed by the fixing by the fixing pieces 5xi, 5xj, ... And the fixing by the projecting pieces 6x, a strong and stable fixing strength can be obtained. Therefore, the power plug device 1 shown in FIG. 1 is completed.

Although the embodiments have been described in detail above, the present invention is not limited to such embodiments. For example, the fixing piece portion may be provided only on one side of the fitting groove. In addition, the detailed configuration, shape, material, quantity, method, etc. can be arbitrarily changed without departing from the scope of the present invention.

[0022]

[Effect of device]

 As described above, in the power plug device according to the present invention, the mounted portion is formed of the thermoplastic resin, and the fitting groove is closed by the thermoplastic deformation at a position adjacent to the fitting groove in the mounted portion. Since the fixing piece portion for fixing the power plug pin is formed to project, the power plug pin can be firmly fixed to the mounted portion without rattling, and a remarkable effect of reliably preventing a failure due to disconnection can be obtained.

[Brief description of drawings]

1 is a perspective view showing a part of a power plug device according to the present invention;

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a perspective view illustrating a method of manufacturing the power plug device.

FIG. 4 is a plan view of a plate material for explaining a method of manufacturing a power plug pin of the power plug device,

[Explanation of symbols]

 1 Power Plug Device 2 Attached Part 3x ... Fitting Groove 4x ... Power Plug Pin 4xr ... Rear End Side 5xi ... Fixed Piece 6x ... Projection Piece

Claims (4)

[Scope of utility model registration request] 1. A power plug device having a power plug pin mounted in a fitting groove provided in a mounting portion, wherein the mounting portion is formed of a thermoplastic resin, and a position adjacent to the fitting groove in the mounting portion. A power plug device, wherein a fixing piece portion for fixing the power plug pin by projecting a fitting groove by thermoplastic deformation is formed. 2. The power plug device according to claim 1, wherein a pair of fixing pieces are provided on both sides of the fitting groove. 3. The power plug device according to claim 1, wherein a projecting piece is formed on the rear end side of the power plug pin. 4. The power plug device according to claim 3, wherein the protruding piece portion is formed in a sawtooth shape.