JPS6035181Y2 - electrical connectors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical connector, and more particularly to a push-on type electrical connector.

Traditionally, there have been screw-in, bayonet, and push-on types for connecting the plug and jack parts that form an electrical connector, but the push-on type is widely used because of its ease of operation. This is becoming more and more common.

Conventional push-on electrical connectors include locking fingers that can be elastically biased in the radial direction of the electrical connector, and the action of the locking fingers locks and releases the connection between the plug portion and the jack portion. I try to do that.

However, in such conventional push-on type electrical connectors, the lock is achieved by the sloped part of the locking finger, so it is not completely locked and there is a strong possibility that the lock will come off if a fairly strong pulling force is applied. Met.

Therefore, in order to eliminate the drawbacks of conventional push-on type electrical connectors such as Such a button-on type electrical connector has been proposed in the present applicant's 1975 Utility Model Application No. 6482.

An example of this bush-on type electrical connector will be briefly explained based on FIG. 1 of the accompanying drawings.

Although FIG. 1 shows a partially sectional view of the state in which the connection is completed, in order to connect the jack portion 200 to the plug portion 100, the unlocking sleeve 15 of the plug portion 100 must be
The jack part 200 is pushed into the jack part 200 so that the tip of the jack part 200 enters the space 241 of the jack part 200.

Then, first, the tip of the expanded spring finger-shaped piece 233 collides with the tapered part 155A at the tip of the lock release sleeve 150, and is guided by this tapered part 155A, so that the tip of the finger-shaped piece 233 protrudes. Sleeve 15 beyond section 155
It goes within 0.

Further, when the jack portion 200 is advanced, the male terminal 11
0 begins to engage with the recess 211 of the female terminal 210, and at the same time, the cam surface 236A of the finger-like piece 233 engages with the locking protrusion 133 at the distal end of the outer sleeve 130, and When the protrusion 133 passes over the cam surface 236A and reaches the groove 232 after being biased inward into the space 237, the finger 233 tends to elastically return to its original expanded position. Locking groove 232 and locking protrusion 1
33 are elastically engaged with each other as shown in FIG.

In this state, the vertical wall 236B of the finger-shaped piece 233 and the vertical rear wall 133A of the protrusion 133 engage with each other, so that an axial tensile force is applied to separate the plug portion 100 and the jack portion 200. Even if the plug part is 100
and jack portion 200 are never separated, and therefore,
In this state, this electrical connector is in a locked state.

In order to release this locked state, the plug part 100
The unlocking sleeve 150 is slid to the left in FIG. 1 against the force of the spring 152.

At this time, the protruding portion 155 at the tip of the sleeve 150 engages with the cam surface 235A of the finger-like piece 233, and the finger-like piece 233
is again biased radially inward into the space 237, and the groove 2
Since the locking protrusion 133 is made to come out from the locking protrusion 133, the jack portion and the plug portion can be easily separated by further pulling the lock release sleeve 150 to the left (in FIG. 1) at this time. .

This button-on type connector is more completely resistant to tensile forces because the lock is achieved by engaging vertical surfaces, but it has the following drawbacks.

In this button-on type electrical connector, as described above, when connecting and separating the connector, the spring fingers 2
A space 237 is required to allow the fingers 33 to be deflected radially inward, so the dielectric 220 must be tapered and the fingers 2
Since the 33 itself has a mechanical function of locking and also has an electrical function as an external conductor of the electrical connector, it causes impedance mismatch and VSWR.
This may lead to deterioration of the condition.

SUMMARY OF THE INVENTION The object of the present invention is to provide a push-on type electrical connector that overcomes these drawbacks and can provide complete locking.

Next, the present invention will be described with reference to FIGS. 2 to 4 of the accompanying drawings with regard to embodiments of the present invention.

2A and 2B are a half-sectional front view and a right side view showing a state in which a coaxial cable is connected to a jack portion of an electrical connector according to an embodiment of the present invention.

As shown, this jack portion 400 includes a female terminal 410 for the center conductor, a dielectric 420, and an outer sleeve 430.
, a cable fixing nut 440, a locking sleeve 450 as a locking member, and a lock release sleeve 4.
60 in the same center.

As usual, the center conductor female terminal 410 has a recess 411 at its tip to receive the tapered tip of the center conductor male terminal of the plug portion, and has an exposed center conductor 601 of the coaxial cable 600 at its rear end. It has a recess 412 for receiving the tip of the.

The wall 413 surrounding the recess 411 is tapered slightly inwardly, and slits 413A are preferably provided at appropriate locations along the periphery to provide springiness.

By doing so, the female terminal for the center conductor and the male terminal can be securely connected.

The cable fixing nut 440 is adapted to receive the outer conductor 602 of the coaxial cable 600, and has a screw 441 on its outer periphery that engages with a screw 431 inside the rear end of the outer sleeve 430.

The tip of the center conductor 601 of the coaxial cable 600 is fixed to the center conductor female terminal 410 by soldering 412A or the like, and the outer conductor 602 of the coaxial cable 606 is fixed to the cable fixing nut 440 by soldering 440A or the like. .

Reference number 603 indicates a dielectric of coaxial cable 600.

The outer sleeve 430 is fixed by screwing the screw 431 at the rear end into the screw 441 of the cable fixing nut 440.

At the tip of the outer sleeve 430, there are four spring fingers 4.
To give 32, slot 433 in 4 places along the periphery.
is formed.

This ensures a positive engagement between the outer sleeve of the jack and the outer sleeve of the plug described below.

The locking sleeve 450 has a locking groove 452 formed around the cylindrical sleeve, and in this example, in order to provide six spring fingers 453, slots 454 are formed at six locations along the periphery. It is formed.

A screw 451 is provided inside the rear end of the locking sleeve 450, and the locking sleeve 450 is fixed by screwing this into a screw 434 provided on the outer periphery of the rear end of the outer sleeve 430. ing.

At this time, the inner diameter of the locking sleeve 450 is such that the spring fingers 453 of the locking sleeve 450 are arranged between the inner peripheral surface of the locking sleeve 450 and the outer peripheral surface of the outer sleeve 430.
The dimensions are such that a gap S is left which allows for inward deflection.

The front wall of the locking groove 452 is a vertical wall 452A that acts as a locking surface.

Furthermore, an inclined cam surface 455 is provided on the outer peripheral surface of the locking sleeve 450 on the rear side of the locking groove 452, which functions as described later.

As will be described later, the lock release sleeve 460 has an inner circumferential surface 461 at its front end that receives and presses the outer sleeve of the plug portion, and its rear end is axially attached to the outer circumference of the rear end of the lock sleeve 450. It is designed to be able to be attached so that it can slide in any direction.

Further, the unlocking sleeve 460 has a protrusion 462 that protrudes inward from the intermediate inner circumferential wall.

The tip of this protrusion 462 is connected to the unlocking inclined cam 46 that engages with the inclined cam surface 455 of the locking sleeve 450.
2A, and when the lock release sleeve 460 is moved rearward in the axial direction, the spring fingers 453 are biased inward by the mutual cam action of the inclined cam surface 462A and the inclined cam surface 455, As will be described later, the lock can be released.

3A and 3B are half-sectional front and left side views of a plug portion mating with the jack portion 400 of FIG. 2 according to the present invention.

As shown, the plug portion 500 includes a center conductor male terminal 510, an inductor 520, and an outer sleeve 530 concentrically.

The center conductor male terminal 510 has a tapered tip 511 that fits into the recess 411 of the center conductor female terminal 410 of the jack portion 400, as usual, and a rear end 51.
2 is connected to a lead wire in the mounting set.

The outer sleeve 530 is attached around the dielectric 520 and surrounds the tip 511 of the center conductor male terminal 510, with a space 531 therebetween for receiving the dielectric 420 of the jack portion 400 and the tip of the outer sleeve 430. It is designed to produce.

Furthermore, a locking groove 452 for the locking sleeve 450 of the jack portion 400 is provided on the inner circumferential wall of the distal end of the outer sleeve 530.
A locking protrusion 532 that engages with is formed.

The front edge of this locking protrusion 532 has a jack portion 40.
0, when the plug part 500 is coupled to the locking protrusion 532 by engaging the front edge of the locking sleeve 450 of the jack part 400 and biasing the spring fingers 453 of the locking sleeve 450 inward. A guide slope 532A is provided to guide the guide so as to allow engagement with the locking groove 452.

The rear wall of the locking protrusion 532 is connected to the vertical wall 452 of the locking groove 452 of the locking sleeve 450 of the jack portion 400.
A vertical wall 532B acts as a locking surface that engages with A.

Next, the operation of coupling and separating the jack portion 400 and the plug portion 500 of the present invention as described above will be described with reference to FIG. 4.

FIG. 4 is a half-sectional front view showing a state in which the jack portion 400 of FIG. 2 and the plug portion 500 of FIG. 3 are combined.

In order to connect the plug portion 500 to the jack portion 400, the tip of the outer sleeve 530 of the plug portion 500 is connected to the unlocking sleeve 46 of the jack portion 400.
0 and the outer sleeve 430, and then push the plug portion 500 in.

Then, the locking protrusion 53 at the tip of the outer sleeve 530
The guide inclined surface 532A on the front edge of No. 2 abuts against the front edge of the spring finger-shaped piece 453 of the locking sleeve 450, and further,
As the plug portion 500 is pushed in, the guide inclined surface 5
32A, the spring fingers 453 of the locking sleeve 450 are biased inwardly into the gap S, and the locking protrusion 5
32 comes to exceed the vertical wall 452A of the locking groove 452.

At this time, the spring finger-like piece 453 returns outward to its original position due to its elasticity, and the locking protrusion 532 locks into the locking groove 45.
2 into a fitted shape as shown in FIG.

In this state, the vertical wall 53 of the locking protrusion 532
2B and the vertical wall 452A of the locking groove 452 are joined at a plane perpendicular to the axis of the connector, and the outer periphery of the outer sleeve 530 is held down by the inner peripheral surface 461 of the lock release sleeve 460. , applying an axial tensile force that would cause jack portion 400 and plug portion 500 to separate will never separate jack portion 400 and plug portion 500, and therefore, in this state, this electrical connector is in a locked state. It is in.

Of course, in this state, the tip 511 of the male center conductor terminal 510 of the plug portion 500 fits into the recess 411 of the female center conductor terminal 410 of the jack portion 400, and
The outer sleeve 530 of the plug portion 500 fits around the outer sleeve 430 of the jack portion 400;
They are in electrical contact with each other.

In order to release this locked state, the jack part 40
The unlocking sleeve 460 of No. 0 is slid to the left in FIG.

At this time, the protrusion 46 of the unlocking sleeve 460
The second inclined cam surface 462A acts on the inclined cam surface 455 of the spring fingers 453 of the locking sleeve 450, biasing the spring fingers 453 inwardly toward the gap S, and the outer sleeve 530 The vertical wall 5 of the locking protrusion 532
32B and the vertical wall 452A of the locking groove 452 are released.

Therefore, in this state, if a separating force is further applied between the jack portion 400 and the plug portion 500, the jack portion and the plug portion are easily separated.

The electrical connector of the present invention has the above-mentioned configuration,
Since the lock is achieved by the engagement of the surfaces perpendicular to the axial direction of the electrical connector, it is more complete against the tensile force acting on the connector, and moreover,
The electrical contact between the outer sleeve 430 acting as the outer conductor of the jack portion 400 and the outer sleeve 530 acting as the outer conductor of the plug portion 500 is made independent of the locking sleeve 450 which provides biasing during mating and uncoupling of the connector. Therefore, no impedance mismatch occurs (no reduction in VSWR occurs).

[Brief explanation of the drawing]

FIG. 1 of the accompanying drawings is a half-sectional view showing an example of a push-on type electrical connector, FIGS. 2A and 2B are a half-sectional front view and right side view showing a jack portion of the electrical connector as an embodiment of the present invention, 3A and 3B are a half-sectional front view and a left side view showing a plug portion according to the present invention that is combined with the jack portion of FIG. 2, and FIG. 4 is a view showing the jack portion of FIG. 2 and the plug portion of FIG. FIG. 3 is a half-sectional front view showing a combined state. 400... Jack part, 430...
Outer sleeve, 450...Tatsuk sleeve, 4
52...Locking groove, 452A...Vertical wall, 453...Spring finger piece, 455...
... Inclined cam surface, 460 ... Lock release sleeve, 461 ... Inner peripheral surface, 462 ...
Projection part, 462A... Inclined cam surface, 500...
...Plug part, 530 ... Outer sleeve, 532 ... Locking protrusion, 532A ...
...Guide slope, 532B... Vertical wall.

Claims (1)

[Scope of utility model registration request] In an electrical connector comprising a plug portion and a jack portion, one of the plug portion and the jack portion includes a radially inward portion of the connector disposed on the outside with a certain gap from the outer periphery of the first outer sleeve. a locking member that can be elastically biased and has a locking groove near its front end; an unlocking sleeve having cam means for biasing the first outer sleeve radially inward; A second outer sleeve is provided in electrical contact therewith, and near a forward end of the second outer sleeve is provided a locking projection for engaging the locking groove of the locking member. A guide slope is provided on the inner edge of the front end of the locking protrusion and engages with the front end of the locking member to bias the locking member radially inward of the connector. The locking is achieved by simply pushing the plug portion into the jack portion so that the tip of the second outer sleeve fits between the unlocking sleeve and the first outer sleeve. The locking member is elastically biased radially inward by the cam action of the guide slope on the front end inner edge of the locking projection against the front end of the locking member, and then the locking projection and the locking groove are biased elastically inwardly in the radial direction. The connector coupling is locked by the elastic engagement with the lock member, and when the lock release sleeve is retracted, the lock member is elastically biased radially inward by the cam action of the cam means, and the lock is released. An electrical connector characterized by scales.