JPS582068Y2 - Power cord attachment device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a power cord attachment device for electrical equipment.

The power cord must be securely fixed to the main body of the device, but normally the power cord 6 is sandwiched between the A-type bushings 1 shown in FIG. This is done by inserting as shown in the figure.

Another example is to insert the B-type bushing 7 shown in FIG. 4 into the notch 17a of the main chassis 17 as shown in FIG. The mounting method shown in Figure 5a, 1) and Figure 7 was used.

However, power cords come in various sizes.

For example, Japan, the United States, and Canada use almost the same 2-core cord, but in Europe, the 2-core cord is slightly thicker.
A core cord is used, and in the UK, the outer diameter is approximately 7.
A 3-core cord with a diameter of 3 mm is also used in Australia, and a 3-core cord with an outer diameter of approximately 5.3 mm is also used in Australia.

For this reason, it is impossible to prepare one type of bushing to allow installation of all power cords, and in reality,
One type of bushing shall be used for a given size power cord.

Therefore, it is possible to change the chassis for each destination, or to drill two or more holes for bushings of different sizes in the chassis, as shown in Figure 12, and use only one of the holes as needed. The method used was to cover unnecessary holes with labels such as rated metals.

As described above, in the former method, standardization of parts is not achieved and it is complicated.

Also, in the latter method, although the chassis is standardized, labels such as rated metal require two or more shapes.
Furthermore, since it is necessary to hide the hole, the label for rating metal etc. becomes larger than necessary, and the cost increases because it must be strong.

Furthermore, since the label of the rating metal etc. must be placed exactly at that position, there are drawbacks such as restrictions in terms of placement and design.

Furthermore, when installing the conventional B-type bushing 7 as shown in FIG.
6 must be separated, with the main surface and rear surface being one
It has been difficult to use B-type bushings in body-molded plastic chassis.

Note that the A-type bushing and B-type bushing described here are not commonly referred to as A type or B type, but
The prefix is used to distinguish between two commonly used types of bushings.

The present invention eliminates the drawbacks of the prior art described above, and has a plastic chassis in which the main surface and rear surface are integrally molded, and has only one outlet for the power cord.
To enable the selection of the most suitable bushing for power cords of various thicknesses, by being able to use any type of bushing, eliminating unnecessary holes from being left behind by labels such as rated metal, etc. The purpose of the present invention is to provide a power cord attachment device that allows for

The present invention will be explained in detail below with reference to embodiments shown in the drawings.

FIG. 8 is a plan view showing one embodiment of the bushing mounting device according to the present invention, and FIG. 9 is a sectional view taken along line A-A in FIG.
Figure 0 is a perspective view of the B-type bushing, and Figures 11a and 11) are cross-sectional views showing the state in which the A-type bushing 1 and the B-type bushing 7 are attached, respectively.

In FIGS. 8 and 9, the plastic chassis 18
The main surface 20 and the rear surface 19 are integrally formed and are substantially perpendicular to each other.

A hole 4 for attaching an A-type bushing is drilled in the rear surface 19 of the chassis 18, and a pair of inverted-shaped claws facing each other is provided in the main surface 20, with the center of the hole 4 being approximately the center. The attached ribs 21 and 22 are molded into one piece.

In this case, the length ml in FIGS. 8 and 9 is slightly smaller than the length 11 of the groove 12 of the B-type bushing, and the length m2 is slightly smaller than the length 12 of the part of the bushing base. The height m3 is approximately the same as the height 13.

In the bushing mounting device configured in this way,
As shown in FIGS. 11a and 11), both the A-type bushing 1 and the B-type bushing 7 can be used.

That is, when installing the A-type bushing 1, the inverted-shaped tabbed ribs 21 and 22 can be installed without getting in the way, and when installing the B-type bushing 7, the Type bushing 7 to 11th
When inserted in the direction of the arrow shown in the figure, the inverted-shaped tabbed ribs 21 and 22 bend outward due to the elasticity of the plastic, and then the tabs 21a and 22a catch on the four parts 14 and 15 of the B-shaped bushing 7. , the B-shaped bushing is fixed.

As explained in detail above, according to the present invention, in a plastic chassis in which the main surface and rear surface are integrally molded, (1) both A-type bushings and B-type bushings can be used simply by improving the structure of the chassis; Additionally, it can accommodate multiple cords without using special bushings.

That is, it is possible to standardize the plastic chassis and select the optimal bushing for the power cord.

(2) Since there is only one outlet for the power cord, there is no need to cover one hole with a label such as rated metal as in the past, increasing the degree of freedom in terms of placement and design.

(3) Since there is no need to cover one hole with a label such as rated metal, even if rated metal is used, the shape is simple and standardized, and it can be manufactured at low cost since it can be made thin.

It has very practical effects such as

[Brief explanation of the drawing]

FIG. 1 is a plan view of the A-type bushing, FIG. 2 is a plan view of the A-type bushing mounting hole, and FIG. 3 is a cross-sectional view showing the conventional A-type bushing installed state. Figure 4 shows a B-type bushing, where a is a plan view, b is a sectional view, and C is a back view, and Figure 5a is a front view showing the conventional B-type bushing installed. is a cross-sectional side view, and FIG. 6 shows the main surface chassis 17 for mounting the B-type bushing.
FIG. 7 is a sectional view taken along line II in FIG. 5a. Fig. 8 is a plan view showing an embodiment of the bushing mounting device according to the present invention, Fig. 9 is a sectional view taken along line A-A in Fig. 8, and Fig. 10 shows a power cord attached to the B-type bushing. The perspective view and FIG. 11 are a sectional side view when an A-type bushing is attached to the bushing attaching device of the present invention, and the same figure is a sectional side view when a B-type bushing is attached. FIG. 12 is a rear view of a conventional plastic chassis 18, and in the same figure, C is a rear view of the electrical equipment with each power cord attached. 1...A type bushing, 4...A type bushing mounting hole, 6...Power cord, 7...
...B type bushing, 14°15...B type bushing recess, 18...Plastic chassis,
19... Rear side of chassis 18, 20...
Main surface of chassis 18, 21.22... Ribs with inverted claws, 21a, 22a... claws.

Claims (1)

[Scope of utility model registration request] A power cord attachment device in which at least two types of power cord bushings, large and small, are attached to a chassis integrally provided with a main surface and a rear surface that are substantially perpendicular to each other, the rear surface of the chassis having a hole for attaching a small bushing. and two opposite ribs with claws in the shape of an inverted letter facing each other for mounting the large bushing are provided on the main surface adjacent to the hole, so that the power cord can be pulled out from the hole for mounting the small bushing when the large bushing is used. A power cord attachment device characterized by: