JPH0123904B2 - - 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 side of the plug part is three poles.

The above-mentioned relay adapter plug incorporates two connection terminals into the inner cavity of its jack portion, which contact the inner pole (first pole) and second pole of the plug inserted therein. At the same time, these two connection terminals operate so as to facilitate connection and conduction to the plug part while ensuring pressure contact with the inner pole and second pole of the inserted plug, and their operation is mutually consistent. It is required that it be installed in such a way that it can be performed without interference.

For this reason, three-prong relay adapter plugs have a problem in that there are multiple assembly means for assembling the connection terminals into the inner cavity of the jack portion, making assembly as a relay adapter plug cumbersome. .

The present invention has been made in order to solve this problem, and makes it easy to connect and conduct the two connecting terminals to the inner pole of the plug part and to assemble them into the inner cavity of the jack part. However, the assembled connection terminal must function to securely press against the plug inserted into the jack part and maintain connection continuity, and the operation at that time must be in a condition that does not interfere with each other. The purpose is to make it happen.

Therefore, the present invention has been made based on the knowledge obtained as a result of various studies to achieve the above-mentioned object.

That is, the connection terminal to be assembled into the jack part of the three-prong relay adapter plug is made by punching out a springy metal plate and has a pair of opposing contact pieces forming a fork shape on the front end and rear end. 2 connection terminals formed in a generally horizontal H-shape, each having a
The two roughly H-shaped connecting terminals are assembled and assembled into the jack in a state where they cross when viewed from the axial direction (back and forth direction), and the fork-shaped contact pieces on the front end side are respectively plugged. The fork-shaped contact pieces on the rear end side of the inner terminals are fitted onto the outer periphery of the inner terminals formed at the rear ends of the parts, and the fork-shaped contact pieces on the rear end side of the connectors are fitted so that the fork-shaped contact pieces of one connection terminal protrude long and the fork-shaped contact pieces of the other connection terminal protrude. If the shaped contact piece protrudes short, it will facilitate connection and conduction to the inner pole terminal of the plug part, and the contact with the inner pole and second pole of the plug inserted into the jack part will be easier. It has been found that this can be done reliably without causing any interference. In addition, 2 which forms approximately H shape
Although it is extremely difficult to assemble two connecting terminals in a crossed state when viewed from the axial direction and assemble them into the jack, it is better than the synthetic resin material fitted into the inner cavity of the metal outer cylinder of the jack. The holding cylinder is formed so that it can be assembled into a cylindrical body by closing the divided holding cylinders formed separately, and when assembling this holding cylinder, there are two approximately H-shaped pieces inside it. If the connection terminals are assembled in a crossed state and closed, and the holding cylinder is fitted into the metal outer cylinder to be incorporated into the jack, assembly into the jack will be easy. , connection and conduction between the fork-shaped contact piece on the front end side of the two approximately H-shaped connection terminals and the inner terminal of the plug part are also made at the front end of the holding cylinder in which the two approximately H-shaped connection terminals are enclosed. This is because it has been found that this can be easily done by inserting the rear end of the plug into the plug.

From this, in the present invention, a holding cylinder made of a synthetic resin material that is fitted into the inner cavity of a metal outer cylinder of the jack part is assembled by closing the divided holding cylinders that have been molded separately. Two connection terminals are made by punching out a springy metal plate into a roughly H shape and forming fork-shaped contact pieces on the front end and rear end respectively.
The holding cylinder is assembled into the divided holding cylinder to which the holding cylinder is assembled so that they cross each other when viewed from the axial direction, and the holding cylinder is assembled and closed, and the holding cylinder is fitted into the outer cylinder, and the two pieces are The fork-shaped contact pieces on the front end side of each of the connection terminals are respectively fitted to the outer periphery of an inner terminal protruding from the rear end of the plug part fitted into the front end of the metal outer cylinder, and one This invention proposes a means for constructing a three-pole relay adapter plug by forming a fork-shaped contact piece on the rear end side of one connecting terminal to be long and forming a fork-shaped contact piece on the other connecting terminal to be short.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

Figures 1A and 1B show that the jack part a, which connects the relay adapter plug A according to the present invention, which is used when listening to a mono radio using a stereo headphone, to the rear end side of the plug part b has a 90-degree phase difference. It shows a broken state. Jack part a
has a connecting terminal 2a (FIG. 1 C) that comes into contact with the second pole of a three-prong plug b' inserted into its inner cavity as shown by the chain line as shown in FIG. 1 A. ,
As shown in Figure 1B, the connection terminal 2b (Figure 1D) contacts the inner pole (first pole) of the three-prong plug b' inserted as shown by the chain line. It is constructed into a three-pole jack part with two connecting terminals 2a and 2b incorporated therein, and a metal socket fitting 4 that contacts the outer cylindrical sleeve that serves as the outer pole of the three-pole plug b' to be inserted. The socket fitting 4 is connected to the sleeve serving as the outer pole of the plug part b via the metal outer cylinder 3, which is the same as in the conventionally known one.

Therefore, the two connection terminals 2a and 2b mentioned above
Both are made by punching out a springy metal plate with a wall thickness of about 1 mm and forming it into a horizontal H-shape with a pair of fork-shaped contact pieces on both front and rear ends. be.

That is, in the case of the connection terminal 2a, as shown in FIG.
A pair of fork-shaped contact pieces 22a, 22a are respectively formed, and the overall shape is horizontally oriented approximately H-shaped. As shown in the figure, a pair of fork-shaped contact pieces 21b, 21b and a pair of fork-shaped contact pieces 22b, 22b are respectively formed on both front and rear end sides, and the whole is formed into a horizontally oriented approximately H-shape. It has been done.

These connecting terminals 2a and 2b are connected to the fork-shaped contact pieces 21a and 2 of the connecting terminal 2a shown in FIG.
1a and the fork-shaped contact pieces 22a, 22a are connected to the fork-shaped contact pieces 21b, 21b and the fork-shaped contact pieces 22b, 2 of the connection terminal 2b shown in FIG.
The connection terminal 23b has approximately the same length (vertical width in the figure) as the connection terminal 23b.
A pair of fork-shaped contact pieces 21 on one side (front end side)
a, 21a and a pair of fork-shaped contact pieces 21b, 2 on one side (front end side) of the other connecting terminal 2b.
Unlike the length of 1b, this connection terminal 2a
A pair of fork-shaped contact pieces 22 on the other side (rear end side)
a, 22a and a pair of fork-shaped contact pieces 22b, 2 on the other side (rear end side) of the other connecting terminal 2b.
The length is different from that of 2b.

Moreover, these connection terminals 2a, 2b have respective contact pieces 21a, 21a, 21b, 2 on the front end side thereof.
Engagement grooves 24a, 24b are formed on each outer peripheral edge of the connecting terminals 2a, 2b for assembling and holding the connecting terminals 2a, 2b in the holding tube 1 made of synthetic resin, and the respective contact pieces 21a, 21a, 21b, 2
Abutting protrusions 25a, 25a, 25b, and 25b are formed on the inside of the front end of the plug part b, respectively, so as to abut against the outer peripheral surface of the inner terminal _b1 protruding from the rear end of the plug part b. .

Each of the contact pieces 22a, 22a, 22b, 22b on the rear end side of these connecting terminals 2a, 2b has a slope such that each outer peripheral edge thereof gradually approaches the opposite side toward the rear end that becomes the free end. Further, on the inside of each rear end thereof, there are protrusions 26a, 26a, which abut against the outer peripheral surfaces of the inner pole and the second pole of the three-pole plug b' wound around the jack part a. 26b,2
6b are provided protruding from each other.

Holding cylinder 1 that holds the connection terminals 2a and 2b
is formed of a synthetic resin material into a cylindrical body that is fitted inside the metal outer cylinder 3 that constitutes the body of the jack part a, as shown in A and D of Fig. 1. In this case, as shown in Fig. 2 A to F, a divided holding cylinder 1a is formed which is divided into two by a dividing plane along the axial direction, and the two divided holding cylinders 1a are closed together. so that it can be assembled into the holding cylinder 1. The inner surface of the divided holding cylinder 1a has a semi-cylindrical shape with a hollow part 10 formed therein, as shown in E and F of FIG. A guide groove 12 that is further fitted into the recess 10a is formed in the first recess when the holding cylinder 1 is assembled.
As shown in E and F of the figure, they are formed in four equally spaced parts with 90 degrees different phases.
This guide groove 12 is formed in two types, long and short, and the short guide groove 12b is formed at the intermediate portion in the left and right width direction of the divided holding cylinder 1a (FIG. 2 C, D).
Further, the long side guide groove 12a is connected to the divided holding cylinder 1a.
By assembling the two divided holding cylinders 1a and 1a together into the holding cylinder 1, the two divided holding cylinders 1a, 1a are formed on the divided abutting surfaces of the holding cylinder 1, so that the holding cylinder 1 is divided into two parts so as to form a guide groove of a predetermined width. Moreover, in the intermediate portions of these guide grooves 12a, 12b in the front-rear direction, engagement grooves 24a, 24 formed in the aforementioned two connection terminals 2a, 2b are provided.
Protrusions 11 that fit into the portions b are respectively formed.
13 is a cylindrical hollow portion formed on the front end side of the holding cylinder 1, and 14 is a blind portion of the guide groove 12.

A connection terminal 2 is placed inside this two-split holding cylinder 1.
In order to assemble and hold a and 2b, first,
The contact piece 22b of the connecting terminal 2b shown in FIG.
and the protrusion 11, and then the long guide groove 12
The contact pieces 22a, 22a of the connecting terminal 2a shown in FIG.
4a and the protrusion 11, and then the other half of the divided holding cylinder 1a is closed together to assemble into an integral holding cylinder 1, and at the same time the two connection terminals 2a and 2b are confined inside.

As a result, the two connection terminals 2a, 2b are connected to the guide grooves 12a, 12a, 12b, 12b and the engagement groove 2.
4a, 24b and the protrusions 11...... are in a state where they cross each other when viewed from the axial direction, and are assembled and held within the holding cylinder 1, thus forming two approximately H-shaped connection terminals 2a. , 2b and assembled into the metal outer cylinder 3 of the jack part a as shown in A and B of FIG. The terminals 2a and 2b are assembled into the jack part a with the terminals 2a and 2b crossed. A plug portion b is provided on the front end side of this holding cylinder 1.
By fitting and inserting the rear end side, the front ends of the two connecting terminals 2a and 2b, which are confined and held in the holding cylinder ₁ , are attached to the outer peripheral surface of the inner terminal b 1 protruding from the rear end of the plug part b. Side fork-shaped contact pieces 21a, 21a and 21
b and 21b are fitted together so that connection and conduction with the inner electrode terminal b ₁ can be obtained.

As described above, in the means of the present invention, the two connecting terminals 2a and 2b, which are formed into a substantially H shape by punching out a resilient metal plate, are used as the connecting terminals to be assembled into the jack part a. When assembling the holding cylinder 1 made of a synthetic resin material, the two approximately H-shaped connection terminals 2a and 2b are assembled by closing the divided holding cylinder 1a formed separately. The holding cylinder 1 with the connecting terminals 2a and 2b confined therein is fitted into the metal outer cylinder 3 which becomes the body of the jack part a, so that the two parts are assembled in a crossed state. Abbreviation for sheet H
Since the shaped connecting terminals 2a and 2b are assembled into the body, this assembly is easy, and when the connecting terminals 2a and 2b are assembled into the holding tube 1, the plug part b can be easily assembled. By inserting the rear end side into the front end side of the holding cylinder 1, these connection terminals 2a, 2b and the inner terminal b ₁ of the plug part b
This connection and conduction work is also facilitated. Furthermore, the two assembled connection terminals 2a and 2b are connected to each other by a fork-shaped contact piece 22 on the rear end side.
a, 22a, 22b, and 22b will surely come into contact with the inner pole and second pole of the plug part b inserted into the jack part a without interference.

[Brief explanation of drawings]

1A and 1B are vertical 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 FIGS. F is - of Figure 1 A and B of the same above.
Figure 2A is a plan view of the divided holding tube that holds the connection terminal of the relay adapter plug as above, and Figure 2B and C are the end faces of the front and rear ends of the divided holding tube as above. Fig. 2, D, E, and F are the second
FIG. 2A is a cross-sectional view taken along lines -, -, and -, and FIG. Explanation of drawing symbols, A... Relay adapter plug, a... Jack part, b... Plug part, b ₁ ...
Inner electrode terminal, 1...holding cylinder, 1a...divided holding cylinder,
11...Protrusion, 2a, 2b...Connection terminal, 21
a, 21b, 22a, 22b...forked contact piece,
23a, 23b...Connection part, 24a, 24b...
...Engagement groove, 25a, 25b...Protrusion, 26a, 2
6b...Protrusion, 27...Notch groove, 10...Hollow part, 12 (12a, 12b)...Guide groove, 13...
...Cylindrical hollow part, 14...Blind part of the groove.

Claims (1)

[Claims] 1. A holding cylinder made of a synthetic resin material that is fitted into the inner cavity of a metal outer cylinder of the jack part is assembled by closing the divided holding cylinders that have been molded separately, and a springy metal plate is formed into a roughly H shape. Two connection terminals are punched out to form fork-shaped contact pieces on the front end side and the rear end side, respectively, and are inserted into the divided holding cylinder for assembling the holding cylinder, so as to cross each other when viewed from the axial direction of the holding cylinder. The holding cylinder is fitted into the outer cylinder, and the fork-shaped contact pieces at the front ends of the two connecting terminals are connected to the metal outer cylinder. The pronged contact piece on the rear end side of one connecting terminal is long, and the prong-shaped contact piece on the rear end side of one connecting terminal is long, and the prong-shaped contact piece on the rear end side of one connecting terminal is A relay adapter plug made of short, fork-shaped contact pieces.