JPH0212695Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a jack, and particularly to a jack into which a rotating plug is inserted.

(b) Conventional technology For example, in a turntable-type microwave oven, a stick-shaped thermocut is inserted into the meat to measure the internal temperature of the meat, thereby automatically controlling the degree of grilling. It's summery.

In such cases, the connection between the jack and the plug attached to one end of the thermocupple becomes a problem, since the thermokupple rotates with the meat.

As such a connecting means, for example, there is a type in which a jack is rotatably supported on the top plate of a cooking chamber of a microwave oven. In this case, the upper end of the jack is fitted with two circular electrodes which are electrically connected to the inner contact piece. Elastic strip-shaped contact pieces are attached to the frame supporting the jack so as to be in contact with each of the circular electrodes. By inserting a rotating plug into such a jack, a detection signal from the thermocouple is extracted via the circular electrode and the contact piece in contact with the circular electrode.

In this way, in the conventional technology, the jack itself rotates, and the strip-shaped contact piece is arranged in a direction perpendicular to the rotation axis, so the structure of the plug supporting part including the jack is complicated and large. There are drawbacks.

(C) Purpose The purpose of this invention is to provide a jack into which a rotating plug can be inserted, and in which the structure of the plug support portion can be simplified and miniaturized.

(D) Structure The jack according to this invention includes a cover contact piece that contacts the tip at the tip of the plug, and a sleeve that contacts the body of the plug, and the sleeve uses an oil-impregnated metal in the contact portion with the body. It is characterized by the fact that

(E) Embodiment FIG. 1 is an exploded perspective view showing the structure of an embodiment of a jack according to this invention.

The jack according to this embodiment includes a sleeve unit 100, a pressing plate 200, and a contact piece unit 300.
and a case 400.

In the sleeve unit 100, 110 is a support plate formed by bending a metal plate into a substantially U-shape. A plug insertion hole 112 is provided in the front plate 111 of the support plate 110, and a plug insertion hole 112 is provided in the front plate 111 of the support plate 110.
A tongue-shaped ground terminal 113 is formed on the upper side of the terminal 11 . Side plates 114, 11 of support plate 110
4 has a T-shape toward the tip,
A locking piece 115 is formed at each tip.
On the other hand, a sleeve 120 is attached and fixed to the outside of the front plate 111 concentrically with the plug insertion hole 112. A screw groove for fixing the jack is formed on the outer periphery of the sleeve 120. In addition, on the inner circumferential surface, there is a stepped portion 12 that becomes smaller in diameter toward the back.
1 is formed. 130 is a slide pipe made of so-called oil-impregnated metal, which is metal such as copper impregnated with lubricating oil. The slide pipe 130 is attached to the sleeve 12 so that its tip abuts the step portion 121.
It is press-fitted and fixed at 0.

The holding plate 200 is made of an insulating plate such as a baking plate, and its four corners are cut out to correspond to the shape of the opening of the case 400. Further, a plug insertion hole 201 is provided in the center thereof.

The contact piece unit 300 is formed by punching out a single elastic metal plate such as phosphor bronze and bending it into a substantially U-shape. The upper plate and the lower plate of the contact piece unit 300 are formed with strip-shaped pieces having the opening as the base end. These sections are each folded inward to form a dowel contact piece 301, 301. An oil-impregnated metal contact 3 is located inside the tip of the contact piece 301.
02 are attached to each. 303 is
The connection terminal is formed by cutting and raising a middle plate interposed between the upper plate and the lower plate.

The case 400 is a bottomed box-like body with an open end, and is integrally formed by molding synthetic resin. The support plate 11 is provided on the side surface of the case 400.
A recess 401 into which the side plate 114 of No. 0 is fitted is provided. Further, a guide rail 40 for supporting the contact piece unit 300 is provided at the inner edge of the side wall.
2 are provided along the longitudinal direction. case 400
A notch 403 for leading out the ground terminal 113 of the sleeve unit 100 is provided on the upper side of the opening.
is formed. The bottom plate of the case 400 has a terminal insertion hole 4 for leading out the connection terminal 303.
04 will be opened. Further, a recess 405 is formed in the center of the bottom plate to provide a gap between the plug and the tip of the inserted plug.

Each component article as described above is assembled and formed as follows.

First, the contact piece unit 300 is inserted into the case 400 along the guide rail 402. At this time, the connection terminal 303 is led out from the terminal insertion hole 404 in the bottom plate of the case 400. Next, press plate 2
00 into the opening of the case 400. Furthermore, the sleeve unit 100 into which the slide pipe 130 is press-fitted is attached so that the case 400 is held between the side plates 114.

FIG. 2 is a sectional view showing a plug inserted into the jack shown in FIG. 1.

In this figure, the same parts as in FIG. 1 are designated by the same reference numerals. 500 is a rotating plug inserted into the jack. Tip 510 at the tip of the plug
The oil-impregnated metal contact 302 and the body 520
are in contact with the inner circumferential surface of the slide pipe 130, respectively. In order to bring the body 520 into loose contact with the slide pipe 130, the outer diameter of the body 520 is made slightly smaller than the inner diameter of the slide pipe 130.

FIG. 3 is an explanatory view showing another embodiment of the invention, particularly a modified embodiment of the cover contact piece. In this figure, the same parts as in FIG. 1 are indicated by the same reference numerals. FIG. 3A is an enlarged perspective view of the cover contact piece 310 used in this embodiment. Kado contact piece 310
is formed by insert molding an elastic metal wire 312 into a substantially rectangular synthetic resin plate 311.
Metal wire 31 extending from the side of synthetic resin plate 311
One end of 2 is bent into a substantially U-shape. A cylindrical oil-impregnated metal contact 313 is attached to the tip of the metal wire. The other end of the metal wire 312 extending from the other side of the synthetic resin plate 311 forms a connection terminal.

Figure b is a sectional view showing a state in which a plug is inserted into the jack according to this embodiment. In this figure, the same parts as in FIGS. 1 and 3a are indicated by the same reference numerals. As is clear from FIG.
00 respectively. Thus, the oil-impregnated metal contact 313 contacts the tip 510 of the plug, and the slide pipe 130 contacts the body 520 of the plug.

In addition, in the above-mentioned embodiment, it was explained that an oil-impregnated metal is used for the contact point of the cover contact piece. However, this may also be such that, for example, a piece of metal such as phosphor bronze constituting the cover contact piece is brought into direct contact with the tip of the plug.

(F) Effect The jack according to this invention uses oil-impregnated metal on the inner surface of the sleeve that comes into contact with the body of the plug.
Friction between the plug body and the inner surface of the sleeve is extremely low, and it is also possible to establish electrical continuity therebetween.

Therefore, according to this invention, the rotating plug can be supported without rotating the jack itself, so the structure of the plug supporting part can be simplified and , can be downsized.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the structure of an embodiment of the jack according to the invention, FIG. 2 is a sectional view showing the jack shown in FIG. 1 with a plug inserted, and FIG. FIG. 7 is an explanatory view showing another embodiment of the invention, particularly a modified embodiment of the cover contact piece. 100...Sleeve unit, 112...Sleeve, 130...Slide pipe, 200...Press plate, 300...Contact piece unit, 301...Double contact piece, 302...Oil-impregnated metal contact, 400...
…Case.

Claims (1)

[Scope of utility model registration request] A jack into which a plug that rotates about a longitudinal centerline is inserted includes a pair of opposing mud contact pieces protruding from both sides of the center line so as to approach the center line, and a pair of opposing mud contact pieces. A contact point of an oil-impregnated metal provided almost at the tip of the plug and arranged to face the constricted part of the tip at the tip of the plug so as to sandwich this constricted part from both sides, and a contact point of oil-impregnated metal that contacts the body of the plug and contacts the constricted part of the tip of the plug from both sides. A jack comprising a sleeve made of oil-impregnated metal for guiding insertion into the jack and for a contact portion with the body.