JPS6042593B2 - Relay adapter plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a relay adapter plug in which the number of poles of the jack part continuous to the rear end of the plug part is Ξ poles.

When listening to radio by inserting the plug of stereo headphones into the output jack of a mono radio, this is because the jack of the mono radio has two poles, and the plug of stereo headphones has a Ξ pole. , only one of the left and right horns can be heard and the other cannot be heard.

In such a case, connect a three-pole jack part to the proximal end of a two-pole plug part, insert it into the inner cavity of the jack part, and connect it to the inner pole of the Ξ-pole plug to be inserted. configuring an adapter plug in which two connecting terminals, a connecting terminal and a connecting terminal for contacting the second pole of the plug, each of which has an inner end connected to an inner pole of a two-pole plug part, If you insert the stereo headphone plug into the mono radio jack through this adapter plug, one horn will connect to the inner and outer poles of the headphone plug, and the headphone plug will connect to the inner and outer poles of the headphone plug. The other horn connected to the second and outer poles of the stereo is connected to the two-pole jack of the mono radio, and the two horns of the stereo work, and the radio is heard from both ears. Be able to listen.

By the way, in the adapter plug used in this way, which has a three-pole jack part, the two connection terminals must be connected to the inner pole and the second pole of the Ξ-pole plug to be inserted, respectively. There is a problem in that it is difficult to ensure that the terminals function as reliable connection terminals without interfering with each other while making contact with each other.

This problem can be overcome by punching out a springy metal plate and using a pair of so-called hawk terminals, each of which has a pair of contact pieces facing each other in a criss-cross pattern. A problem arises in that it becomes troublesome to connect each of the hawk terminals to the inner terminals of the plug section.

The present invention solves this problem by making the two connecting terminals incorporated into the jack part into a form of hawk terminal so that they can surely contact the inner pole and the second pole of the plug inserted into the jack part. This was done based on the knowledge obtained through various studies, with the aim of making the connection with the inner terminal of the plug part easier.

That is, the connection terminal to be incorporated into the jack part is formed from a springy metal plate into a horizontally oriented approximately H-shape with fork-shaped contact pieces at both front and rear ends, and this approximately H-shaped connection terminal is Assemble the two pieces so that they cross when viewed from the front and rear directions, and fit the fork-shaped contact piece on the front end side of each connecting terminal to the outer circumferential surface of the inner terminal protruding from the rear end of the plug part. For example, this was made based on the knowledge that connection and conduction with the inner terminal can be easily performed.
For this reason, in the present invention, two pieces of metal plate having spring properties are punched out in a horizontally oriented substantially H shape and provided with a pair of fork-shaped contact pieces on the front end side and the rear end side, respectively. The connecting terminals are assembled into the body of the jack part in a crossed state when viewed from the front and back directions, and the fork-shaped contact piece on the front end side of each connecting terminal is protruded from the rear end side of the plug part. The present invention proposes a means for fitting the outer peripheries of the pole terminals, respectively.
Next, a practical example of the present invention will be described in detail with reference to the drawings. Fig. 1 A. The jack part a that connects the adapter plug A according to the present invention, which is used when listening to a mono radio with stereo headphones, to the rear end side of the plug part b has a phase difference of 90 degrees. It shows the broken state. The jack portion a has a connection terminal 2a (see FIG. 1A) in its inner cavity that comes into contact with the second pole of a three-prong plug b'' inserted as shown by the chain line as shown in FIG. 1A. c) and a three-prong plug b inserted as shown by the chain line as shown at the opening in Figure 1.
The connecting terminal 2b (
The two connection terminals 2a and 2b of Fig. 1 D) are incorporated, and the metal socket fitting contacts the outer cylindrical sleeve that becomes the outer pole of the three-prong plug b'' to be inserted. Each of the connection terminals 2a and 2b has a wall thickness of 1Tf$, as shown in Fig. 1.C and 2.
A pair of fork-shaped contact pieces 21a, 21a, 2 are formed by punching out a metal plate with a spring property of about L size, and have a forked shape at both the front and rear ends, respectively.
2a, 22a, 21b, 21b, 22b, and 22b, and is formed in a horizontal substantially H shape.

Fork-shaped contact piece 2 on the front end side of the connecting terminal 2a shown in FIG.
1a and 21a on the rear end side and 22a and 22a on the rear end side and the boundary part 23a (the vertical width in FIG. 1 C) is the forked contact on the front end side of the connecting terminal 2b shown in FIG. Piece 21
The left and right widths of the boundary portion 23b between b and 21b and the contact pieces 22b and 22b on the rear end side are approximately the same width and approximately equal to the inner diameter of the holding cylinder 1, but the connection shown in c in FIG. Terminal 2a
The length of the legs of the contact pieces 21a, 21a on the front end side, and the contact pieces 21b, 21 on the front end side of the connecting terminal 2b, shown in FIG.
In addition, the leg lengths of the contact pieces 22a, 22a on the rear end side of one connection terminal 2a, and the lengths of the contact pieces 22b, 22b on the rear end side of the other connection terminal 2b, 2b are different from the leg lengths of the The length of the legs is different.

Further, a fork-shaped contact piece 21 on the front end side of the connection terminals 2a and 2b
Engagement grooves 24 are provided on each outer peripheral edge of a.21a, 21b.21b.
a and 24b are opened, and the protrusion 11 protruding into the holding cylinder 1 is engaged therewith.

And each of these contact pieces 21a, 21a, 21b, 21
On the inside of the tip of b, there are protrusions 25a, 25a, 25 that abut against the outer circumferential surface of the inner terminal Kg that is protruding from the rear end of the plug part b.
b, 25b are formed. On the other hand, each of the connection terminals 2a
・Forked contact piece 22a on the rear end side of 2b, 22a, 22b
- Each outer peripheral edge of 22b is sloped so that the gap with the holding cylinder 1 gradually increases toward the rear end, which is the free end, and inside each of the rear ends, there is a As shown by the chain lines in Figure 1 A and the opening, there are protrusions 26a, 26a, 26b, 26b that abut against the outer surface of the inner pole, the outer surface of the second pole, and the outer surface of the second pole of plug b'' to be inserted, respectively. It is shaped.

27a and 28a are the boundary portions 23 of one of the connection terminals 2a.
27b and 28b are spaces surrounded by the fork-shaped contact pieces 21a and 21a on the front end side and the fork-shaped contact pieces 22a and 22a on the rear end side, respectively, and 27b and 28b are the spaces surrounded by the boundary part 23b of the other connecting terminal 2b. The space is surrounded by the fork-shaped contact pieces 21b, 21b on the front end side and the fork-shaped contact pieces 22b, 22b on the rear end side, respectively.

These spaces 27a, 28a and 27b, 28b are,
Each contact piece 21a, 21a, 22a, 22a and 21b.
21b, 22b, and 22b, as shown in FIG. , the space 28b of the other connection terminal 2b
The boundary portion 23a of one of the connecting terminals 2a is located at . These connection terminals 2a and 2b are connected to a holding tube 1 fitted into the body of the jack portion as shown in FIG.
There are two types of holding cylinders 1: one is an integral cylinder that cannot be divided (Fig. 2), and the other is a cylinder that is divisible (Fig. 3).

When the undivided holding cylinder 1 shown in FIG. 2 is viewed from one end,
Four guide grooves 2 are recessed from the hollow portion 10 toward the thick wall side at 90 degrees different phases (FIG. 2B). When viewed from the other end, the hollow portion 10 communicates with a hollow portion 12 whose diameter is the length d between the opposing groove bottoms 12c of the guide groove 12. c). The method for assembling the connecting terminals 2a and 2b into this undivided holding cylinder 1 is as follows. First, from the end surface of the holding cylinder 1 shown at the opening in FIG. 2, insert the connecting terminal 2b on the side of the contact piece with short legs shown in FIG. The fork-shaped contact pieces 21b, 21b on the front end side are inserted first, and at that time, the front ends of these contact pieces 21b, 21b contact the protrusions 11, 11, and move inwardly while bending. Then, when the engagement grooves 24b, 24b face the protrusions 11, 11, they are restored by their spring properties, and the protrusions 1
1 and 11 engage with the engagement grooves 24b and 24b, respectively (the first
Figure mouth).

Next, the connecting terminal 2a on the side with longer legs of the contact piece shown in FIG. The contact pieces 21a and 2 are inserted first, but as described above, these contact pieces 21a and 2
Each front end of 1a contacts the front projections 11, 11 and advances while being bent inward, and the engagement grooves 24a, 24a contact the front projections 11, 11.
When facing 1, it restores itself with its springiness,
These protrusions 11, 11 engage with the engagement grooves 24a, 24a, respectively.

At this time, a space 27a formed by these contact pieces 21a, 21a and their boundary portion 23a is provided with the connection terminal 2b.
The boundary portion 23b is located between the two connecting terminals 2a and 2.
As shown in FIG.

When the inner end side of the plug part b is inserted from the cylindrical hollow part 13 side of the holding cylinder 1, the outer peripheral surface of the inner terminal b protruding from the rear end of the plug part b, Fork-shaped contact pieces 21a and 21a on each front end side of the two connecting terminals 2a and 2b,
Inner protrusion 25a of 21b and 21b●25a, 25b●2
5b bite into each other, and connect each connection terminal 2a, 2b.
The front end of the plug becomes connected to and conducts to the inner terminal of the plug part b.

In the divided holding cylinder 1 shown in FIG. 3, one end of the guide groove 12 is closed, and two types of guide grooves 12a and 12b having different lengths are 90 degrees out of phase with each other, as shown in FIG. The guide grooves 12a and 12a are opened at different angles, and split abutment surfaces are formed along the long guide grooves 12a.

14 is a blind portion of the guide groove 12.

Therefore, in order to assemble the connecting terminals 2a and 2b into the divided holding cylinder 1, first insert the fork-shaped contact pieces 22b and 2b on the front end side of the connecting terminal 2b on the side where the legs of the contact pieces are shortened into the short guide grooves 12b. 2
2b from the side, and fit the engagement groove 24a and the protrusion 11, and then insert the contact piece 22a of the connecting terminal 2a on the side with the longer leg of the contact piece into the long guide grooves 12a.
22a from the side, and the engagement groove 24a and the protrusion 11 are fitted together, and then the other divided holding cylinder 1 is placed on top of this to assemble the integrated holding cylinder 1.

Since the two connecting terminals 2a and 2b cross each other, from the cylindrical hollow part 13 of this holding cylinder (1),
By inserting the rear end side of the plug part b in the manner described above, the contact pieces 21a and 2 on the front end side of each connection terminal 2a and 2b are removed.
1a, 21b, 21b are fitted into the outer peripheral surface of the inner terminal Kg of the plug part b, and the respective front ends of the two connecting terminals 2a, 2b combined in a crossed state are connected to the plug part b.
The inner terminal of the terminal becomes fully connected and conductive. As described above, the means of the present invention is such that the connection terminal to be incorporated into the body of the jack portion is formed by punching out a springy metal plate and forming a sideways H-shaped connection terminal with fork-shaped contact pieces on both front and rear ends. The two roughly H-shaped connecting terminals are assembled into the body so that they cross when viewed from the front and back, and the fork-shaped contact piece on the front end side of each connecting terminal is connected to the inner terminal of the plug part. This is because the fork-shaped contact piece on the rear end side of each connection terminal is used as a contact piece for the plug inserted into the jack part by being fitted onto the outer peripheral surface and used for connection with the inner terminal of the plug part. While facilitating the connection with the inner terminal of the plug part, the contact pieces can be made to reliably come into contact with the inserted plug without interfering with each other.

[Brief explanation of drawings]

1A and 1B are longitudinal sectional views of a relay adapter plug according to an embodiment of the present invention, FIGS. 1C and 2 are plan views of connection terminals used in the same relay adapter plug, and FIG. is a perspective view of the connecting terminals crossed as above, Figure 2 A is a longitudinal cross-sectional view of the holding tube of the connecting terminal of the adapter plug for relaying the same as above when it is made of an undivided cylinder, and Figure 2 is 2 is an end view of one side of the above holding tube, FIG. 2 C is an end view of the other side of the above holding tube, and FIG. 3 A is a plan view of the divided holding tube when the above holding tube is composed of a divided cylinder. Figure 3, opening and C, are end views of both the front and rear ends of the same cylinder, and Figure 3, 2, H and 3, are cross-sectional views taken along line I, ■-■ line, and ■-■ line in Figure 3 A. It is. Explanation of drawing symbols, A...Adapter plug, a
... Jack part, 1 ... Holding cylinder, 2a, 2
b... Connection terminal, 21a, 22a, 21b, 22b...
Contact piece, 23a/23b...Boundary part, 24a
...Engagement groove, 25a, 26a, 25b, 26b
...Protrusions, 27a, 28a, 27b, 28b...
・Space, b...Plug part, b''...Three-pole plug, b1...Inner terminal, 10...
...Hollow part, 11...Protrusion, 12.12a.1
2b...Guide groove, 12c...Groove bottom, d
... Length between groove bottoms, 13 ... Hollow part, 14
...Blind part of the guide groove.

Claims (1)

[Claims] 1. Two connection terminals each having a pair of fork-shaped contact pieces on the front end and rear end of a springy metal plate punched out in a horizontally oriented approximately H shape, viewed from the front and back. Assemble them in the body of the jack part in a crossed state, and fit the fork-shaped contact pieces on the front end side of each connection terminal to the outer peripheral surface of the inner terminal protruding from the rear end side of the plug part. A relay adapter plug that features the following features: