JPH0554232B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a plug jack with a grounding electrode for connecting an AC power source.

[Background technology]

FIG. 1 shows a conventional example, where 4' is a plug body, and 8' is a jack body that fits into the plug body 4' and connects a power source. In this type of plug jack, a grounding plate 9 is provided as a grounding electrode on the upper surface of the plug body 4', and a contact connection with the grounding plate 9 is provided in the recess 11 of the jack body 8' into which the plug body 4' is inserted. An electrically conductive contact spring 10 is provided. In such a conventional example, since the contact spring 10 is of a so-called receiving spring type, there are problems in that it is difficult to connect and disconnect the plug body 4' and the jack body 8', and the contact spring 10 is deformed. There was a problem that poor contact was likely to occur.

[Purpose of the invention]

The present invention has been provided in view of the above-mentioned points, and provides a plug jack with a grounding electrode for the purpose of smooth attachment/detachment and reliable connection of each contact part. It is.

[Disclosure of the invention]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 2 shows an exploded perspective view of the plug body 4 and the jack body 8. In the figure, 12 is a body made of an insulating material, and 13 is a cover made of an insulating material that covers the upper surface of the body 12. The cover 13 is screwed and fixed with screws 14 and nuts 24. Reference numeral 15 denotes a cord to be connected to an AC power source, etc., and the tip of the support part 28 made of an insulating material has three cords 15A, 15.
The first crack is B, 15C. Code 15A, 1
5B is for the power supply, and cord 15C is for the ground electrode. The ends of cords 15A and 15B are crimp terminals 1
It is fixed at 6 and 16. Reference numeral 17 denotes an elastic contact spring curved into a substantially Ω-shape, which is electrically conductive, and one end of which is connected to the distal end surface 16a of the crimp terminal 16 by welding, and a contact 18 is fixed to the other end. These crimp terminals 16, contact springs 17, and contacts 18 constitute the terminal portion 1. The terminal portion 1 is accommodated in terminal portion storage recesses 23 formed on both sides of the body 12. 19 is a conductive terminal plate, and a connecting piece 19a extending integrally from the terminal plate 19 and a cord 15c are connected by soldering or welding. Reference numeral 20 denotes a conductive spring bent into a substantially W-shape. One end of the spring 20 is connected and fixed to the tip end surface 19b of the terminal plate 19 by welding, and a locking hole 29 is bored in the other end. There is. Reference numeral 2 designates an electrically conductive contact pin formed in a substantially cylindrical shape, with a protruding locking pin 2a that locks into a locking hole 29 of the spring 20 at its base end, and a substantially hemispherical tip. Reference numeral 21 denotes a suction plate made of a magnetic plate, and an insertion hole 22 through which the contact pin 2 is inserted is bored in the center. Further, a flange 2b is integrally formed along the outer periphery on the base end side of the contact pin 2, and is biased by a spring 20 to restrict the amount of protrusion from the insertion hole 22 by the flange 2b. Contact pin 2 is usually body 1
2 and the cover 13. The suction plate 21 is disposed in a groove 26 on the central tip side of the body 12, and the contact pin 2 and the like are housed in a housing recess 25.

Further, on the side of the jack body 8, 30 is a socket body made of an insulating material, and an opening 31 into which the plug body 4 is fitted is formed in the front surface of the socket body 30. 7 is a magnet that attracts the attraction plate 21, and this magnet 7 is attached to the recess 3 in the center of the socket body 30.
It is stored in 2. Reference numeral 33 denotes an attraction plate consisting of a pair of magnetic plates, which are attracted to both sides of the magnet 7 and placed together in the recess 32 . 33a is a suction piece for attracting the suction plate 21. 6 is a conductive contact plate, the upper and lower ends of which are connected to the socket body 30.
The contact plate 6 is fixed to the socket body 30 by being inserted into and locked into locking holes 34 and 35 formed at the top and bottom of the socket body 30 .
Further, the contact plate 6 has a central portion thereof forming a contact portion 6a projecting in a U-shape on the front surface, and this contact portion 6a.
a and the tip of the contact pin 2 come into contact with each other due to the elastic force of the spring 20 and are electrically connected. Reference numeral 36 denotes a contact rod that connects to the contact 18 of the terminal portion 1 of the plug body 4. The contact rod 36 is made of conductive material and has a threaded portion 36a threaded at the rear thereof. The pair of contact rods 36 are arranged in the contact recesses 39 of the socket body 30, and are positioned in the front and back direction by the central positioning piece 36b, and the terminal plate 37 is attached to the screw portion 36a protruding from the back surface of the socket body 30. It is screwed and fixed with a nut 38 through it. The contact portion 5 is composed of the contact rod 36, the terminal plate 37, the nut 38, and the like.

When the plug body 4 and the jack body 8 are not fitted together, the contact pin 2 is biased by the elastic force of the spring 20, and its tip protrudes into the opening 27, as shown in FIG. ing. Next, when the plug body 4 is fitted into the jack body 8, first,
The suction plate 21 is suctioned and fixed to the tip surface of the suction piece 33a of the suction plate 33. At this time, contact pin 2
contacts the contact portion 6a of the contact plate 6, and the contact pin 2 is reliably connected to the contact plate 6 by the elastic force of the spring 20. In this way, the ground electrode is
Terminal plate 19, spring 20, contact pin 2 and contact plate 6
connected via. In addition, the contact part 5 and the terminal part 1
In contact with the contact rod 36, the resilient force of the contact spring 17 allows the contact 18 and the tip surface of the contact rod 36 to be more reliably connected. When separating the plug body 4 and the jack body 8, it is sufficient to simply pull out the plug body 4, and the suction plate 33 and the suction plate 2
1. The terminal portion 1 and the contact portion 5 will be separated from each other. Note that 40 is an electric wire connected to the contact plate 6.

〔Effect of the invention〕

As described above, the present invention includes a set of electrically conductive terminals for a power supply, electrically conductive contact pins for a grounding electrode, and an adsorption plate made of a magnetic material, which are housed in a plug body, and the terminals A pair of conductive contact points that come into contact with the plug body, a conductive contact plate that comes into contact with the contact pin, and a magnet that attracts the adsorption plate are housed and arranged in the jack body that fits into the plug body. Therefore, when the plug body and jack body are fitted together, the adsorption plate is attracted by the magnet, and the plug body and jack body are securely connected, and the contact between the contact pin and the ground electrode of the contact plate is secure even with a small contact pressure. The contact pin is supported by having its rear end locked in a locking hole in a conductive spring, and its front end inserted into an insertion hole in a suction plate so that it can protrude from the insertion hole. Therefore, when supporting the contact pin in a movable manner, it is possible to effectively use the spring for applying spring force to the contact pin, the magnet, and the adsorption plate necessary for adsorption, and as a result, the contact pin can be supported by It does not require any other special parts for support, and since it uses a magnetic connection, the plug body can be attached and detached smoothly. Furthermore, the built-in magnet on the jack body side makes it easy to attach and detach the plug body. This has the effect of making the main body smaller and lighter.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the conventional example, Fig. 2 is an exploded perspective view of the embodiment of the present invention, Fig. 3 is a cross-sectional view showing the connection state of the above, and Fig. 4 is a cross-section showing the state of the same when disconnected. It is a diagram. 1 is a terminal part, 2 is a contact pin, 21 is a suction plate, 4
5 is a plug body, 5 is a contact portion, 6 is a contact plate, 7 is a magnet, and 8 is a jack body.

Claims (1)

[Claims] 1 A set of conductive terminals for the power supply, a movable conductive contact pin for the ground electrode, and an adsorption plate made of a magnetic material are housed in the plug body, and the contact pin has a rear end. It locks into the locking hole of the conductive spring,
The front end is inserted and supported into the insertion hole of the suction plate so as to freely protrude from the insertion hole, and the suction plate includes a pair of conductive contact portions that contact the terminal portion, a conductive contact plate that contacts the contact pin, and the suction plate. A plug jack with a grounding pole, which includes a magnet for attracting and disposed inside a jack body that fits into the plug body.