JPS6042594B2 - 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 the three-prong jack part to the proximal end of the two-prong plug part, insert it into the inner cavity of the jack part, and connect it to the inner pole of the three-prong plug that is being inserted. This adapter plug constitutes an adapter plug in which two connecting terminals, a terminal and a connecting terminal for contacting the second pole of the plug, are connected to the inner pole of a plug portion with each inner end having two poles. If you insert a stereo headphone plug into the jack of a mono radio, one horn will connect to the inner and outer poles of the headphone plug, and the second headphone plug will connect to the inner and outer poles of the headphone plug. The other horn connected to the pole and the outer pole are connected to the two-pole jack part of the mono radio, and the two horns of the stereo work, so that the radio can be heard from both ears. Become.

By the way, the adapter plug that is used in this way has a Ξ-pole jack, and the two connection terminals are connected to the inner and second terminals of the Ξ-pole plug, respectively, within the jack. If the front ends of the two assembled connection terminals are brought into contact with each other, it becomes difficult to connect the front ends of the two connected terminals to the inner terminal of the plug. When assembled to the plug part with the front end connected to the inner terminal of the plug part, the rear end located in the inner cavity of the jack part functions as an actual connection terminal without interfering with each other. Problems arise that make it difficult to do so.

The present invention has been made to solve these problems, and the two connection terminals are arranged in the inner cavity of the jack part so that they do not interfere with each other and function as reliable contact terminals. It is an object of the present invention to make it possible to extremely easily and reliably perform the operation of connecting each front end side to the inner terminal of a plug part while assembling and holding the plug part.

The means of the present invention for achieving this object includes a metal plate having a spring property in a substantially H-shape inside 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. Two connection terminals are punched out and have fork-shaped contact pieces formed on the front end side and the rear end side, respectively, and are assembled and held in a state where they are crossed when viewed from the axial direction of the holding cylinder, The fork-shaped contact pieces on the front end side of each of the two connection terminals are fitted into the outer periphery of the inner terminal protruding from the rear end of the plug part fitted into the front end of the metal outer cylinder. The fork-shaped contact piece on the rear end side of one of the two connecting terminals is formed long, and the fork-shaped contact piece on the rear end side of the other connecting terminal is formed short. .

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

Figure 1: Adapter plug A according to the present invention used when listening to mono radio with stereo headphones
The jack part a, which is connected to the rear end side of the plug part b, is shown broken with a phase difference of 90 degrees.
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 the first
As shown at the opening in the figure, two connections are made with the connecting terminal 2b (D in Figure 1) that comes into contact with the inner pole (first pole) of the three-prong plug b'' inserted as shown by the chain line. The terminals 2a and 2b are assembled into a three-pole jack part with a metal socket fitting 4 that contacts the outer sleeve which becomes the outer pole of the three-pole plug b'' to be inserted. The socket fitting 4 is connected to the outer sleeve, which is the outer pole of the plug part b, via the metal outer cylinder 3, which is the same as the conventional one. However, the aforementioned two connection terminals 2a and 2b are both punched out of a springy metal plate with a wall thickness of about 1 mm, and are provided with a pair of fork-shaped contact pieces on both front and rear ends, respectively. It is shaped like a horizontal H-shape.

That is, as shown in C of FIG. 1, the connection terminal 2a has a pair of fork-shaped contact pieces 21a and a pair of fork-shaped contact pieces 21a on both front and rear (left and right in the figure) ends. The contact pieces 22a, 22a are respectively formed, and the whole is formed in a horizontally oriented substantially H-shape, and the connecting terminal 2b has, as shown in FIG. A pair of fork-shaped contact pieces 21b, 21b and a pair of fork-shaped contact pieces 22b, 22b are provided at both front and rear ends, respectively, and the whole is formed into a horizontally oriented substantially H-shape.

These connection terminals 2a and 2b have a connecting portion 23a between the fork-shaped contact pieces 21a and 21a of the connection terminal 2a shown in FIG. The length is approximately the same as that of the connecting portion 23b between the fork-shaped contact pieces 21b and 21b of the terminal 2b and the fork-shaped contact pieces 22b and 22b. The length of the pair of contact pieces 21a, 21a forming a fork is different from the length of the pair of contact pieces 21b, 21b forming a fork on one side (front end side) of the other connection terminal 2b. A pair of fork-shaped contact pieces 22 on the other side (rear end side)
The lengths of a and 22a are different from the lengths of a pair of fork-shaped contact pieces 22b and 22b on the other side (rear end side) of the other connection terminal 2b.

In addition, these connecting terminals 2a and 2b are attached to the outer periphery of each of the contact pieces 21a, 21a, 21b, and 21b on the front end side of the connecting terminals 2a and 2b. Engagement grooves 24a and 24 when assembling and holding
b is formed, and each of the contact pieces 21a, 21a,
21b. An inner terminal is provided on the inside of the front end of 21b and protrudes from the rear end of plug part b? A protrusion 25a that abuts against the outer periphery of
- 25a, 25b, 25b are formed respectively.

Each of the contact pieces 22a, 22a, 22b, and 22b on the rear end side of these connection terminals 2a and 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. and inside each of their rear ends,
Projections 26a, 26a, 26 that are wound around the jack part a and abut against the inner and second outer peripheral surfaces of the three-pole plug b''
b and 26b protrude from each other.

The holding tube L that holds the connection terminals 2a and 2b may be made of an integral cylinder that cannot be divided, as shown in FIG. There are also those made of a cylindrical body that can be divided.

When the undivided holding cylinder 1 is viewed from one end in the axial direction, the second
As shown in the figure, four guide structures 12 are recessed from the hollow part 10 of the shaft center part to the thick side with 90 degree phase angles, and the parts near the front ends of the guide grooves 12 are recessed. protrusion 11
... has been established.

When viewed from the other end in the axial direction, the hollow portion 10 communicates with a cylindrical hollow portion 13 having a diameter d connecting the groove bottoms of the guide groove 12, as shown in FIG. 2C. This diameter d is
The lengths correspond to the lengths (vertical widths) of the connecting portions 23a and 23b of the aforementioned connecting terminals 2a and 2b. The method for assembling the connecting terminals 2a and 2b into this undivided holding cylinder 1 is as follows.

First, from the rear end surface of the holding cylinder 1 shown at the second opening, insert the short-legged connection terminal 2b shown in FIG. contact piece 2
Insert from the 1b/21b side.

At that time, the front ends of these contact pieces 21b, 21b contact the protrusions 11, 11 and move inwardly,
When the engagement grooves 24b, 24b are in a state facing the protrusions 11, 11, they are restored by their spring properties,
The engagement grooves 24b, 24b engage with the protrusions 11, 11, respectively (as shown in FIG. 1), and the connection terminal 2b is assembled and fixed inside the holding cylinder 1. Next, in the other opposing guide grooves 12, 12, connect the long-legged connection terminals 2a (FIG. 1C), and the fork-shaped contact pieces 21a, 21a on the front end side thereof.
Insert from the side.

At that time, as described above, the tips of the contact pieces 21a, 21a contact the protrusions 11, 11, and move inwardly while bending, until the engagement grooves 24a, 24a are opposed to the protrusions 11, 11. summer. However, it is restored by its spring property, and the engagement grooves 24a and 2 are formed in the protrusions 11 and 11, respectively.
4a are engaged (FIG. 1A), and the connecting terminal 2a is assembled and held inside the holding tube 1. At this time, the connection terminal 2
The connecting portion 23b of b is located, and the two connecting terminals 2a and
2b, when viewed from the axial direction, are in a mutually crossed state as shown in E and F in FIG. However, the two connecting terminals 2a and 2a assembled and held in the holding cylinder 1 in this way
2b is a state in which the attached holding cylinder 1 is fitted inside the metal outer cylinder 3 of the jack part a, and the rear end of the plug part b is attached to the front end side of the metal outer cylinder 3. Alternatively, with the front end side of the metal outer cylinder 3 fitted to the rear end of the plug part b, insert the holding cylinder 1 into the outer cylinder 3 from the rear end side. By fitting and inserting the rear end side of the plug part b into the cylindrical hollow part 13 on the front end side of the holding cylinder 1, the two connection terminals 2a and 2
Fork-shaped contact pieces 21a, 21a, 21b, on each front end side of b.
The inner surface of the front end of the plug part b comes into contact with the outer peripheral surface of the inner terminal b1 protruding from the rear end of the plug part b, and the two connections assembled and held in the holding cylinder 1 are connected. Terminal 2a
・Connection and conduction between the front end of 2b and the inner terminal E of plug part b is completed.

Next, FIGS. 3A to 3A show one divided holding cylinder of the holding cylinder 1 which is divided into two parts.

The divided holding cylinder has a guide groove 12 as shown in FIG.
One side end is closed, and two types of grooves 12a and 12b having different lengths are formed with a phase difference of 90 degrees, and there are divided abutment surfaces along the long guide grooves 12a and 12a. 14 is a blind portion of the guide groove 12.

Connecting terminals 2a. To assemble and hold the connecting terminal 2a, first insert the contact piece 22b of the connecting terminal 2b shown in FIG. Fit the mating groove 24b and the protrusion 11, and then fit the long guide groove 12.
At 12a, attach the contact piece 2 of the connecting terminal 2a shown in A of Fig. 1.
2a and 22a, and the engagement groove 24a and the protrusion 1
1 are fitted together, and then the other half of the divided holding cylinder is placed on top of this to assemble into an integral holding cylinder 1. As a result, the two connecting terminals 2a and 2b are connected to the guide grooves 12a, 12a, and 12b.
・12b and engagement grooves 24a and 24b and protrusion 11...
As a result, they are assembled and held in the holding cylinder 1 so that they cross each other when viewed from the axial direction.

Then, by inserting the rear end side of the plug part b into the cylindrical hollow part 13 side of this holding cylinder 1 in the manner described above, the front ends of each of the connection terminals 2a and 2b held in the holding cylinder 1 are An inner terminal protruding from the rear end of plug part b? Connected to conductive state. As described above, in the present invention,
Two connection terminals 2a and 2b to be incorporated into the inner cavity of jack part a
A pair of fork-shaped contact pieces 21a, 21a, 22a, 22a are formed by punching out a metal plate with spring properties, and are placed on both front and rear ends.
, 21b, 21b, 22b, 22b are each formed into a substantially H shape, and the metal outer cylinder 3 of the jack part a
The socket fitting of the jack part a is assembled and held in a holding cylinder 1 made of a synthetic resin material that is fitted inside the holding cylinder 1 in a crossed state when viewed from the axial direction of the holding cylinder 1. When the three-prong plug b'' is inserted from 4 to 4, the inner pole of the three-prong plug b'' is connected to the fork-shaped contact piece 2 on the rear end side of one of the connecting terminals 2b.
2b and 22b to securely contact each other, and the second pole of the plug b'' is inserted into the opposing distance between the fork-shaped contact pieces 22a and 22a on the rear end side of the other connecting terminal 2a. Since the press-fit fits securely into contact, contact continuity between the connecting terminals 2a and 2b with respect to the inserted plug b'' is ensured, and each of the two connecting terminals 2a and 2b at that time The shaped contact pieces 22a, 22a, 22b, 22b are connected to the plug b.
The direction in which it moves to expand and contract due to pressure contact with the outer peripheral surface of
Since the phases are different by degrees, they function reliably as contact pieces without interfering with each other.

The two connecting terminals 2a and 2b assembled and held in the holding cylinder 1 in this manner have their fork-shaped contact pieces 21a and 21a, 21b and 21b on the front end side connected to the rear end of the plug part b. By inserting the two sides into the front end side of the holding cylinder 1, the plug part b is fitted onto the outer peripheral surface of the inner terminal terminal koji of the plug part b.
The inner terminal b1 and the front ends of the two connection terminals 2a and 2b are connected and electrically connected. Therefore, according to the means of the present invention, the two connecting terminals 2a and 2b incorporated into the three-pole jack part a function as reliable contact terminals for the three-pole plug b'' inserted into the jack part a. Thus, a relay adapter plug can be obtained which can be assembled and held in the inner cavity of the jack part a and can be connected and electrically connected to the inner terminal E of the plug part b with an extremely simple operation.

[Brief explanation of the drawing]

Figure 1 A and 1 are longitudinal cross-sectional views of an adapter plug according to an embodiment of the present invention, Figure 1 No. 2 are plan views of connection terminals used in the adapter plug, and Figure 1 E and 1 are the same as the above. Figure 1 A is a cross-sectional view of the main part taken along the I-1 line and ■-■ line at the opening, and Figure 2 A is a longitudinal cross-section of the holding cylinder of the electrode plate of the same adapter plug when the holding cylinder is composed of an undivided cylinder. The opening in Figure 2 is an end view of one side of the above retaining cylinder, Figure 2 C is an end view of the other side of the retaining cylinder, and Figure 3 A is an end view of the same holding cylinder as above when it consists of a divided cylinder. The top view of the holding cylinder is shown in Figure 3. Figure 3 (opening) and C are end views of both sides of the holding cylinder.
The cross sections taken along the lines ■--■ and ■--■ and FIG. 3 are partially cutaway perspective views of the holding cylinder. Explanation of drawing symbols, A...Adapter plug, a
... Jack section, B ... Jack, b ...
...Plug, b1...Inner terminal, 1...
...Holding tube, 11 protrusions, 2a, 2b...Connection terminal, 21a, 21b, 22a, 22b...Forked contact piece, 23a, 23b...Connection part, 2
4a/24b...Engagement groove, 25a/25b...
...Protrusion, 26a/26b...Protrusion, ″2
7...Notch groove, 10...Hollow part, 12,
12a/12b...Guide groove, 13...
Cylindrical hollow part, 14...Blind part of the above groove.

Claims (1)

[Claims] 1. A springy metal plate is punched out into a roughly H-shape and inserted into the holding cylinder made of a synthetic resin material and fitted into the inner cavity of the metal outer cylinder of the jack part. Two connecting terminals forming a shaped contact piece are assembled and held together in a crossed state when viewed from the axial direction of the holding cylinder, and the fork-shaped contact pieces on the front end side of each of the two connecting terminals are assembled and held. A contact piece is formed to fit on 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 of the two connecting terminals is connected. 1. An adapter plug as a relay, characterized in that a fork-shaped contact piece on the rear end side of the terminal is long, and a fork-shaped contact piece on the rear end side of the other connecting terminal is formed short.