JPH0652916A - Tooth rest spring structure for hook receptacle - Google Patents

Abstract

PURPOSE:To surely connect a hook receptacle mechanically and electrically, corresponding to the plug blades of plural kinds of modules with a single kind of tooth rest spring. CONSTITUTION:A tooth rest spring 2 of a hook receptacle is composed with a pair of spring pieces 3. The plug blade nipped part of one side spring piece 3 of a pair of the spring pieces 3 is adopted as a convexly bent side plug blade nipped part 3a protrudedly bent toward the other side spring piece 3. The plug blade nipped part of the other side spring piece 3 is adopted as a concavely bent side plug blade nipped part 3b recessedly bent toward an one side spring piece 3. The outer diameter of the convexly bent side plug blade nipped part 3a is made equal to the inner diameter of the smallest-diameter plug blade 4 out of plural kind standardized plug blades 4. The inner diameter of the concavely bent side plug blade nipped part 3b is made equal to the outer diameter of the largest diameter plug blade out of plural kind standardized plug blades. Various kind plug blades can be nipped with concavely and convexly bent side plug blade nipped parts 3a and 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a blade receiving spring of a hook outlet.

[0002]

2. Description of the Related Art Conventionally, a hook outlet as shown in FIG. 2 has been known. In this hooking outlet 1, a terminal plate 7 having a blade receiving spring 2 fixed therein is incorporated in a case formed by connecting a body 5 and a cover 6 with an assembling screw 13. The blade receiving spring 2 is formed by bending a metal plate into a substantially U shape, and further bending the upper portions of the spring pieces 3 which are both side pieces in a direction in which they approach each other to form a blade holding portion. One of the pair of blade holders is a protruding blade holder 3a which is bent toward the spring piece 3 on the other side, and the blade holder of the other spring piece 3 is held. The portion is a concave curved side blade blade holding portion 3b that is concavely curved toward the spring piece 3 on one side, and the body 5
The blade 9 having an arcuate cross section is inserted from the blade insertion hole 8 of the above, and the blade 4 having an arcuate cross section is sandwiched between the protruding side blade blade holding portion 3a and the concave side blade blade holding portion 3b which are opposed to each other. I am trying to do it. In FIG. 2, a terminal screw 10 is inserted through the terminal plate 7, and a tightening washer 11 is screwed onto the terminal screw 10. Reference numeral 12 in the figure denotes a support plate fitted on the tightening washer 11. In addition, reference numeral 13 in the drawing denotes a mounting member, which is mounted on the body 5, and the other end of the mounting member 13 is mounted on a mounting portion of the hooking outlet 1 such as a wall.

By the way, as shown in FIG. 4, the plug blade 4 having an arcuate cross section has been standardized to have a plurality of types having different arcuate diameters depending on the module. Depending on the type of blade 4, the bent side plug blade holding portion 3a
A plurality of types of blade receiving springs 2 having different outer shapes and inner diameters of the concave curved plug blade holding portions 3b were prepared. In FIG. 4, the numbers with R indicate the inner diameter and outer shape of the arcuate blade 4 for each module. That is, in the prior art, the outer diameter of the protruding side blade cutting portion 3a of the blade receiving spring 2 is made equal to the inner diameter of the blade 4 having an arcuate cross section, and the inner diameter of the concave side blade holding portion 3b is set to be the same. The outer diameter of the blade 4 is equal to the outer diameter of the blade 4, and in this way, a plurality of types of blade receiving springs 2 are prepared according to the blades 4 of a plurality of types of modules.

[0004]

However, since a plurality of types of blade receiving springs 2 corresponding to the types of the blades 4 are required as described above, the parts management is troublesome, the cost is increased, and the difference is wrong. The size of the blade receiving spring 2 may be incorporated, which causes quality trouble. The present invention has been made in view of the problems of the above-mentioned conventional example, and its object is to mechanically and electrically correspond to plug blades of plural types of modules by a single type of blade receiving spring. SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure of a blade receiving spring of a hook outlet that can be reliably connected.

[0005]

According to the structure of the blade receiving spring of the hooking outlet of the present invention, the blade receiving spring 2 of the hooking outlet 1 is constituted by a pair of spring pieces 3, and the pair of spring pieces 3 is formed.
Of the spring blades 3 on one side of the spring pieces 3 on the other side
And a bent-side plug blade holding portion 3a bent toward, and a blade-side holding portion of the other spring piece 3 is a concave-side blade blade holding portion 3b that is bent toward the spring piece 3 on one side. The outer diameter A of the protruding side blade blade holding portion 3a is made equal to the inner diameter of the blade blade 4 having the smallest diameter among a plurality of types of standardized blade blades 4 having an arcuate cross section, and the concave side blade blade holding portion 3b It is characterized in that the inner diameter B is made equal to the outer diameter of the blade blade 4 having the largest diameter among the plurality of types of standardized blade blades 4, and by adopting such a configuration, The object of the present invention is achieved by solving the problems of the conventional example.

[0006]

According to the present invention having the above-described structure, however, the smallest diameter plug among the standardized blades 4 of a plurality of types in which the outer diameter of the protruding side blade blade holding portion 3a is arcuate in cross section is provided. By making the inner diameter of the blade 4 equal and the inner diameter of the concave curved side blade blade holding portion 3b equal to the outer diameter of the largest diameter blade blade 4 of the standardized blade blades 4 of the plurality of types described above, a plurality of types can be obtained. Even if any one of the standardized blades 4 is inserted between the protruding side blade blade holding portion 3a and the concave side blade blade holding portion 3b, it can be securely held mechanically and electrically. It came to be like this.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. The basic structure of the hook outlet 1 is shown in FIG.
Since the configuration is similar to that of the conventional example shown in FIG.
Since the blade receiving spring 2 is different from the conventional one in the present invention, the blade receiving spring 2 will be described below. As shown in FIG. 1, the blade receiving spring 2 is formed by bending a metal plate into a substantially U-shape and further bending the upper portions of the spring pieces 3 which are both side pieces in a direction in which they are close to each other to form a blade holding portion. There is. Further, the portions of both spring pieces 2 above the blade holding portion are opposed to each other in a substantially inverted V-shape so as to spread upward. By the way, one of the pair of blade holding portions has one blade holding portion on the other side.
It is the bent side plug blade holding part 3a bent toward
The plug blade holding portion of the other spring piece 3 is a concave curved plug blade holding portion 3b that is bent toward the spring piece 3 on one side. In the present invention, the outer diameter of the protruding side blade blade holding portion 3a is made equal to the inner diameter of the blade blade 4 having the smallest diameter among a plurality of types of standardized blade blades 4 having an arcuate cross section. The inner diameter of the holding portion 3b is the maximum of the blade blades 4 of the above-mentioned standardized blade blades 4 of the plurality of types.
Is equal to the outer diameter of. That is, FIG. 4 shows the blades 4 having different modules. In FIG. 4, “2P1
"5A" means a blade having two power blades and a rated current value of 15 amperes. This "2P15A" blade 4 has an inner diameter of 4.7 mm and an outer diameter of 6.3 mm. . Also, "2P20A" means that there are two power blades and the rated current value is 20 amps, and this "2P20A" is used.
20 A "blade 4 has an inner diameter of 7.2 mm and an outer diameter of 8.8 m.
m. Also, "grounding 2P15A" has 2 blades for power supply.
This means that it is a book and a grounding blade with a single blade and a rated current value of 15 amperes. This "grounding 2P15A"
The blade 4 has an inner diameter of 7.8 mm and an outer diameter of 9.4 mm. Further, “3P20A” means a blade 9 having three power blades and a rated current value of 20 amperes. The blade 3 of “3P20A” has an inner diameter of 10.2 mm and an outer diameter of 1. It is 18 mm. Also, "grounding 3P20A" has two power blade blades and one ground blade and has a rated current value of 2
It means 0 ampere blade 9 and this "ground 3
P20A "blade 4 has an inner diameter of 13.45 mm and an outer diameter of 1
It is 5.05 mm. By the way, each of the above types of blades 9
In order to comply with the above, the inner diameter of the blade 2 of "2P15A" which is the smallest blade 4 among a plurality of types of standardized blades 4 having an arcuate cross section in the outer diameter of the protruding blade blade holding portion 3a. The inner diameter of the concave curved side blade blade gripping portion 3b is set to an outer diameter of 15.05 mm of the blade blade 4 of the "grounding 3P20A" which is the standardized blade blade 4 of a plurality of types described above. By doing so, the blade 4 sandwiched between the protruding side blade blade holding portion 3a and the concave side blade blade holding portion 3b is the blade blade 4 of "2P15A" described above.
To blade blades 4 from "Ground 3P20A"
Even if it is, it can be reliably pinched.

According to the technique of the present invention, each of the blade-blade holding portions provided on the pair of spring pieces 3 as shown in FIG. 3 is bent toward the facing spring piece 3, and the bent-side blade holding portion is provided. It can also be applied to the one having 3a. In the case where the blade-blade holding portions 3a are bent toward the opposing spring pieces 3 as described above, the outer diameter of the bent-side blade holding portions 3a is arcuate in cross section. Among the plurality of types of standardized blades 4, the inner diameter of the blade 4 having the smallest diameter is made equal. That is, in order to correspond to different blades 4 of the module as shown in FIG. 4, the outer diameter of each protruding blade blade holding portion 3a is 4.7 mm which is the inner diameter of the blade blade 4 having the smallest diameter. By doing so, any of the blades 4 from "2P15A" blade 4 to "ground 3P20A" blade 4 shown in FIG. 4 can be reliably held.

[0009]

As described above, according to the present invention, the inner diameter of the blade having the smallest diameter among the plurality of standardized blades having the arcuate cross-section of the outer diameter of the protruding blade holding portion is provided. Since the inner diameter of the concave curved side blade blade holding portion is made equal to the outer diameter of the blade blade with the largest diameter among the standardized blade blades of the above-mentioned multiple types, it is possible to use multiple blade receiving springs of a single type. It can be reliably connected mechanically and electrically corresponding to the blades of various types of modules.

[Brief description of drawings]

1A and 1B show a blade receiving spring of the invention, FIG. 1A is a perspective view, FIG. 1B is a plan view, and FIG. 1C is a sectional view.

FIG. 2 is an overall exploded perspective view of a hook outlet.

FIG. 3 shows an application example of a blade receiving spring, (a) is a perspective view, (b) is a plan view, and (c) is a sectional view.

FIG. 4 is an explanatory view showing the shape of the above blade.

[Explanation of symbols]

 1 Hooking Outlet 2 Blade Receiving Spring 3 Spring Piece 3a Projection-side Plug Blade Holding Part 3b Recessed Curve-side Plug Blade Holding Part 4 Plug Blade

Claims (1)

[Claims] Claims: 1. A blade receiving spring of a hooking outlet is composed of a pair of spring pieces, and a plug blade holding portion of one spring piece of the pair of spring pieces is bent toward the spring piece on the other side. It is a side plug blade holding part, and the other blade blade holding part is a concave side blade holding part that is bent toward one spring side, and the outer diameter of the protruding side blade holding part is a cross section. The inner diameter of the concave curved side blade blade holding part is set to the maximum diameter of the above-mentioned standardized blade blades, which is the same as the inner diameter of the blade blade with the smallest diameter among the plurality of standardized blade blades in an arc shape. A structure of a blade receiving spring of a hooking outlet, characterized in that the outer diameter of the blade is equal to that of the blade.