JPH0123903B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a relay jack in which the number of poles in the jack portion is three.

A three-prong relay jack has two connection terminals on one jack side of the inner cavity of its body that contact the inner pole (first pole) and second pole of the plug inserted there. and arrange two connecting terminals on the side of the other jack part that respectively contact the inner pole and second pole of the plug inserted there,
In addition, these connecting terminals are assembled and held in the inner cavity of the body in a state where the corresponding connecting terminals and the connecting terminals are connected and electrically connected, but at this time, the inner pole and the second It is required to press the poles securely and to assemble them so that they do not interfere with each other.

For this reason, the three-pole relay jack has a problem in that the assembly means for assembling the connecting terminal into the inner cavity of its body is complicated, making assembly as a relay jack troublesome.

The present invention has been made in order to solve this problem, and it is possible to easily assemble the connecting terminal into the body cavity, while also allowing the assembled connecting terminal to be inserted into the jack part. The purpose of the present invention is to function so as to securely press into contact with the plug that is coming in and maintain connection continuity, and to perform the operations at that time without interfering with each other.

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 body of the relay jack is a horizontally oriented type having a pair of contact pieces facing each other so as to form a fork shape on the front end side and the rear end side, which are formed by punching out a springy metal plate. Two H-shaped connecting terminals are used, and the two approximately H-shaped connecting terminals have long legs of the fork-shaped contact piece of one connecting terminal, and long legs of the fork-shaped contact piece of the other connecting terminal. If you shorten the legs of the contact piece and insert the two approximately H-shaped connecting terminals into the body of the relay jack so that they cross when viewed from the axial direction of the body, the front and rear A pair of fork-shaped contact pieces at the front and rear of each plug inserted into the jack of the plug came to bite strongly, and a connection was established, which significantly simplified the structure of the connection terminal. It has been found that it functions reliably while
The two connection terminals formed into a roughly H shape in this way are
Although it is difficult to assemble them into the body in a crossed state when viewed from the axial direction of the body, these two roughly H-shaped connection terminals are assembled into a holding cylinder made of a separable synthetic resin material. This is because it has been found that the holding cylinder can be easily assembled into the body by fitting the holding cylinder into the metal outer cylinder that forms the body.

Therefore, in the present invention, two connection terminals are formed by punching out a springy metal plate and formed into a substantially H shape with a pair of fork-shaped contact pieces on both front and rear ends. The fork-shaped contact piece of one connecting terminal has long legs and the fork-shaped contact piece of the other connecting terminal has short legs, and these two connecting terminals are formed into a cylindrical shape that can be separated from a synthetic resin material. The holding cylinder is assembled and held in a cross-assembled state when viewed from the axial direction of the holding cylinder, and the holding cylinder is fitted into a metal outer cylinder that becomes the body, and the front and rear of the outer cylinder are The present invention proposes a means for constructing a three-pole relay jack by fitting socket fittings to both ends of the jack.

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

Figures 1A and 1B show a relay jack B according to the present invention.
The figure shows a side view taken longitudinally with a phase difference of 90 degrees. In the figure, 3 is a metal outer cylinder constituting the body of the relay jack B, 1 is a holding cylinder made of a divisible synthetic resin material and is fitted inside the metal outer cylinder 3, and 2a and 2b are Two connecting terminals 4, 4 are formed by punching out a springy metal plate into a substantially H shape, and are assembled and held in the holding cylinder 1 in a state where they intersect when viewed from the axial direction. A socket fitting made of a metal material is shown fitted to both the front and rear (left and right in the figure) ends of the metal outer cylinder 3.

The two connection terminals 2a and 2b are each punched out of a springy metal plate with a wall thickness of about 1 mm, and are arranged in pairs facing each other so as to form a forked shape at both front and rear (left and right in the figure) ends. It is formed into a substantially H-shape with a contact piece.

That is, as shown in FIG.
2a and 22a are respectively formed, and the overall shape is horizontally oriented approximately H-shaped, and the connecting terminal 2b has both front and rear ends as shown in FIG. A pair of fork-shaped contact pieces 2 are provided at the portion.
1b, 21b and contact pieces 22b, 22b are formed, respectively, and the whole is formed into a horizontal approximately H-shape.

Then, these two approximately H-shaped connection terminals 2
a, 2b are the fork-shaped contact pieces 21a, 21
a, 22a, 22a, 21b, 21b, 22b,
On the inside of each protruding end of 22b, abutting protrusions 25a,
25b, 26a, 26b are formed respectively, and
The connecting terminals 2a, 2b are attached to the respective outer edge positions of the connecting portions 23a, 23b that connect the fork-shaped contact pieces 21a, 21a, 21b, 21b and the fork-shaped contact pieces 22a, 22a, 22b, 22b with the holding cylinder. Engagement grooves 24a and 24b for insertion into and assembly are provided, respectively.

And again, these two connection terminals 2a, 2b
In one of the connection terminals 2a shown in FIG.
The leg length of 2a is longer than the leg length of the fork-shaped contact pieces 21b, 21b, 22b, 22b of the other connecting terminal 2b, and the length of the leg of the fork-shaped contact pieces 21a, 21a Forked contact pieces 22a, 22a
One of the engaging grooves 24a, 24a provided on the outer edge of the connecting portion 23a that connects the
is formed in a notch groove 27 wider than the front and rear width of the connecting portion 23b of the other connecting terminal 2b, so that the two connecting terminals 2a and 2b can be assembled in a crossed state when viewed from the axial direction of the holding cylinder 1. When mating, the notch groove 27 is arranged to straddle the connecting portion 23b of the other connecting terminal 2b.

These two connecting terminals 2a and 2b forming a substantially H shape
The holding cylinder 1, which is assembled and held in a crossed state, is a cylinder fitted into the inner cavity of a metal outer cylinder 3 that becomes the body of the relay jack B, as shown in A and B of FIG. It is molded into a shape of a synthetic resin material, and at that time, it is molded into a shape divided into two parts as shown in A and B of FIG. As shown in FIG. The guide grooves 12a and 12b are formed with a phase difference of 90 degrees when closed by the blind portion 14, and the guide grooves 12a and 12b are formed at the center portion in the longitudinal direction on each side edge of the connection terminals 2a and 2b. Protrusions 11, 11 that fit into the engagement grooves 24a, 24b...
... are formed respectively. Note that the long guide groove 12a,
12a is formed on the split abutment surface when the two divided holding cylinders 1a are butted together and assembled into the holding cylinder 1, so that each divided holding cylinder 1a is divided into two parts.

In order to assemble the connection terminals 2a, 2b into the holding tube 1, first insert the contact pieces 21b, 21b, 22b, 2 into the short guide groove 12b of one split holding tube 1a.
Insert the connecting terminal 2b on the side with the shorter leg of the contact piece 2b so that its engagement groove 24b engages with the protrusion 11, and then horizontally insert the connecting terminal 2a on the side with the longer leg of the contact piece. In this state, the connecting portion 23 which is vertically connected to the connecting terminal 2b at the notch groove 27 thereof.
b, and the engagement groove 24a thereof is the protrusion 11.
The holding cylinder 1 is fitted into the long guide groove 12a so as to engage with the holding cylinder 1a, and then the other divided holding cylinder 1a is covered to assemble the integral holding cylinder 1.

Then, the holding tube 1 holding the two connecting terminals 2a and 2b is fitted inside the metal outer tube 3 which becomes the body, as shown in A and B of FIG. A three-pole relay jack B is assembled by fitting socket fittings 4, 4 made of metal material to both the front and rear ends of the outer cylinder 3, respectively.

The three-pole relay jack B assembled in this way is
Two approximately H-shaped connection terminals 2 incorporated inside.
a and 2b are in a crossed state when viewed from the axial direction, as shown in E and F of FIG. When the plugs b are inserted into the respective jacks, the fork-shaped contact pieces 21b, 21b and the fork-shaped contact pieces 22b, 22b of the connection terminal 2b on the side where the legs of the contact pieces are shortened are connected to each other. , and the connection terminal 2a on the side with the longer leg of the contact piece bites into the outer periphery of the tip (inner pole) at the tip of plug b, respectively.
The fork-shaped contact pieces 21a, 21a and the fork-shaped contact pieces 22a, 22a are connected to the respective plugs b,
It bites into the outer periphery of the second pole of b and maintains a securely connected and conductive state. At this time, the contact piece 21a of the connecting terminal 2a,
Since the operating directions due to the spring properties of the contact pieces 21a, 22a, 22a and the contact pieces 21b, 21b, 22b, 22b of the connecting terminal 2b are set with a phase difference of 90 degrees, they do not interfere with each other.

As explained above, the three-pole relay jack according to the present invention connects the two connection terminals 2a and 2b, which are formed into a substantially H shape with fork-shaped contact pieces at both front and rear ends, to the relay jack. When viewed from the axial direction, the holding cylinder is assembled and held in a cross state in a separable holding cylinder 1 made of a synthetic resin material, which is fitted into a metal outer cylinder 3 that forms the body of the 1 is fitted into the metal outer cylinder 3 that serves as the body, so that the connection terminal can be easily assembled into the body, and the connection terminal can be easily assembled into the body. It is possible to obtain a relay jack in which the plug is surely brought into pressure contact with the plug inserted into the jack portion, and the operations at that time are performed without mutual interference.

[Brief explanation of drawings]

Figures 1A and 1B are longitudinal cross-sectional views of a relay jack in which the present invention can be implemented, Figures 1C and 2 are plan views of connection terminals used in the above relay jack, and Figures 1H and 1F are the same as the above relay jack. 2A is a plan view of one of the split holding cylinders of the relay jack shown above, and FIG. 2B is an end view of the split holding cylinder shown in the above. Ha, d, ho are the second
Each cross-sectional view of - line, - line, - line in the figure,
FIG. 2F is a partially cutaway perspective view of the divided holding cylinder shown above. Explanation of drawing symbols, B... Relay jack, b...
Plug, 1... Holding cylinder, 1a... Divided holding cylinder, 1
1... Protrusion, 2a, 2b... Connection terminal, 21a,
21b, 22a, 22b... contact piece, 23a, 2
3b...connection part, 24a, 24b...engaging groove,
25a, 25b...Abutting projections, 26a, 26b...
...Protrusion, 27...Notch groove, 12a, 12b...Guide groove, 14...Blind portion of the guide groove, 3...Outer cylinder, 4...Socket fitting.

Claims (1)

[Claims] 1 Punch out a springy metal plate and attach two connection terminals formed into a roughly H-shape with a pair of fork-shaped contact pieces on both front and rear ends. The legs of the contact piece are long and the legs of the fork-shaped contact piece of the other connection terminal are short, and these two connection terminals are held in a holding cylinder formed of a synthetic resin material into a cylindrical shape that can be separated. The cylinders are assembled and held together so that they cross when viewed from the axial direction, and the holding cylinder is fitted into a metal outer cylinder that becomes the body, and socket fittings are attached to both the front and rear ends of the outer cylinder. A relay jack that is fitted with