JPH025501Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to improvements in coaxial connectors.

Coaxial connectors that connect coaxial cords or coaxial cords to coaxial terminals of devices, etc. are required to have a long life in addition to reliable contact between center conductors and outer conductors.

[Conventional technology]

A conventional coaxial connector is constructed as shown in FIG. 3(a), a side sectional view of the jack side main body, and FIG. 3(b), a side sectional view of the plug side connector.

In FIG. 3a, the coaxial jack 6 is inserted into a substantially cylindrical jack body 7 made of a conductive metal such as brass, and approximately at the center of a stepped plug fitting hole 9 of the jack body 7. A cylindrical insulator 10 made of, for example, Teflon, a pin-shaped center conductor 11 made of an elastic conductive metal, for example, phosphor bronze, fixed through the axis of the insulator 10, and a plug-fitting hole 9. It is composed of a plurality of contact pieces 12 attached to a fitting part.

The cord insulator 3 of the coaxial cord 1 is inserted into the hole on the opposite side from the fitting part of the plug fitting hole 9 of the coaxial jack 6, and the outer sheath 5 is peeled off on the outer peripheral surface of the hole. The cord outer conductor 4 made of the copper braided wire is connected and fixed by soldering means or caulking means.

Further, the cord center conductor 2 protruding from the end surface of the cord insulator 3 is inserted and soldered into the axial hole of the cord conductor connecting portion 11a of the center conductor 11.

On the other hand, a plug conductor connecting portion 11b of the center conductor 11 protrudes from the axis of the fitting portion of the plug fitting hole 9. The plug conductor connecting portion 11b is provided with an axial hole into which a plug center conductor 17 (to be described later) is inserted and removably inserted, and a slit is formed in the shell of this axial hole so that the plug center conductor 17 is pressed into contact with the plug center conductor 17. It is composed of Almost in the center of the jack body 7, there is a
An insulator 10 holding the center conductor 11 is fixed to the outer conductor 7a.

Further, reference numeral 12 denotes a contact piece made of an elastic conductive metal thin plate, such as a phosphor bronze plate, which is rectangular in plan view and arcuate in side view. One end of the plurality of contact pieces 12 is fixed to the outer conductor 7a by means such as spot welding, and the other end is in contact with the inner surface of the jack body 7.

Note that there is a male screw 1 on the outer peripheral surface of the jack body 7.
3 is screwed on.

In FIG. 3b, the coaxial plug 15 includes a substantially cylindrical plug body 16 made of a conductive metal such as brass, a cylindrical insulator 18 made of Teflon, for example, inserted into a hollow hole of the plug body 16, and an insulating material 18 made of Teflon, for example. body 18
The pin-shaped plug center conductor 17 is made of a conductive metal, for example, phosphor bronze, and is fixed to the plug through the axis of the plug.

A cylindrical portion of the plug body 16 around the plug center conductor 17 serves as an outer conductor portion 16A, and its outer peripheral surface is configured to contact the inside of the contact piece 12.

Further, a bag nut 19 that engages with the collar of the plug body 16 is attached to the outer peripheral surface of the plug body 16, and when the bag nut 19 is screwed onto the male screw 13 of the coaxial jack 6, the coaxial jack 6 and the coaxial plug are connected. 15 is fitted.

[Problem that the invention attempts to solve]

However, in the conventional coaxial connector described above, there is almost no guide for the outer periphery of the outer conductor portion 16A during insertion and removal. Therefore, the outer conductor portion 16A tends to be inserted or removed obliquely to the axis of the plug fitting hole 9, and therefore always gives a large displacement to one of the contact pieces 12. Therefore, by repeating insertion and removal, the contact piece 12 becomes fatigued, making it difficult to maintain a desired contact pressure, resulting in a problem in that the reliability of the connection between the external conductor parts decreases.

[Means for solving problems]

The above conventional problem is that the plug fitting hole of the jack side main body has internal gear-shaped guide teeth, and the external conductor part of the plug side is configured to be insertable and removable into the circular inner surface formed by the apex surface of the guide teeth. At the same time, one end of the substantially rectangular contact pieces inserted into the grooves between the guide teeth is fixed to the jack body, and the contact portion of the other end is attached to the outer peripheral surface of the outer conductor portion on the plug side. This is solved by the means of the present invention, which makes elastic contact.

[Effect]

According to the above-mentioned means of the present invention, since the outer conductor portion on the plug side is inscribed in the guide teeth, the axis of the outer conductor portion and the axis of the plug fitting hole of the jack body coincide with each other, and the plug is inserted and removed. Therefore, a uniform and small amount of displacement is applied to all contact pieces. Therefore, the reliability of the connection between the outer conductors is improved without fatigue of the contact pieces.

〔Example〕

The gist of the present invention will be specifically explained below with reference to illustrated embodiments. Note that the same reference numerals indicate the same objects throughout the figures.

1 is a side sectional view of a coaxial jack according to an embodiment of the present invention, b is a sectional view perpendicular to the axis, and FIG. 2 is a side sectional view of a guide tooth portion, and b is a front view thereof.

In FIG. 1, a coaxial jack 20 includes a jack body 7, an outer conductor 7a connected to a cord, an outer conductor spring 21 having a plurality of contact pieces 21a, a center conductor 11, an insulator 10, and guide teeth 23 on the inner surface. The sleeve 22 is formed with a sleeve 22.

The coaxial jack 20 has an outer conductor spring 21 fixed to the outer conductor 7a, and an insulator 10 and a center conductor 1.
1 is fixed to the outer conductor 7a by caulking. Next, the sleeve 22 is attached to the jack body 7 and then integrated by, for example, soldering.

The outer conductor spring 21 made of a conductive metal thin plate, for example a phosphor bronze plate, is provided with a plurality of rectangular elastic contact pieces 21a.

On the other hand, the sleeve 22 inserted into the fitting part of the plug fitting hole 25 has an outer diameter that can be press-fitted into the inner diameter of the fitting part, as shown in FIG.
Internal gear-shaped guide teeth 23 having a number of teeth equal to the number of teeth 1a are provided in parallel.

The tooth apex surface of the guide tooth 23 is formed into an arc shape, and the diameter D of the inscribed circle is slightly larger than the outer diameter of the outer conductor portion 16A of the coaxial plug 15.

Such a sleeve 22 is inserted into the fitting portion of the plug fitting hole 25 so that the contact pieces 21a are inserted into the grooves 24 between the guide teeth 23, respectively.

Since the coaxial jack 20 of the present invention is constructed as described above, when the coaxial plug 15 is inserted into and removed from the coaxial plug 15, the outer circumferential surface of the outer conductor portion 16A of the coaxial plug 15 is inscribed in the tooth apex surface of the guide tooth 23. Insert or remove.

That is, the axis of the plug fitting hole 25 and the outer conductor portion 1
The axes of 6A are aligned and inserted and removed. Therefore, a uniform and small amount of displacement is applied to each contact piece 21a. Therefore, the contact piece 21a is not fatigued, and the reliability of the connection between the external conductors is improved.

[Effect of idea]

As explained above, the present invention has a simple structure and
It has excellent practical effects, such as the contact piece does not get fatigued and the connection between each conductor is highly reliable.

[Brief explanation of the drawing]

Fig. 1 shows one embodiment of the present invention, a is a side sectional view of a coaxial jack, b is an axis orthogonal sectional view, Fig. 2 is a side sectional view of the guide tooth portion, b is a front view, and Fig. 3 is a side sectional view of the coaxial jack. The figures show a conventional coaxial connector, in which a is a side sectional view of the coaxial jack and b is a side sectional view of the coaxial plug. In the figure, 1 is a coaxial cord, 2 is a cord center conductor, 3 is a cord insulator, 4 is a cord outer conductor,
6 and 20 are coaxial jacks, 7 is the jack body,
9 and 25 are plug fitting holes, 10 and 18 are insulators,
11 is the center conductor, 11a is the cord conductor connection part, 1
1b is a plug conductor connection part, 12 and 21a are contact pieces, 21 is an outer conductor spring, 15 is a coaxial plug, 1
6 is an outer conductor part, 17 is a plug center conductor, 22 is a sleeve, 23 is a guide tooth, 23a is a tooth top surface,
24 each indicate a groove.

Claims (1)

[Scope of utility model registration request] The plug fitting hole of the jack side main body has internal gear-shaped guide teeth, and the external conductor portion of the plug side is configured to be able to be inserted into and removed from the circular inner surface formed by the apex surface of the guide teeth. One end of the substantially rectangular contact pieces inserted into the respective grooves is fixed to the jack body, and the contact portion at the other end is in elastic contact with the outer circumferential surface of the outer conductor portion on the plug side. coaxial connector.