JP2989141B2 - Coaxial connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a coaxial connector.

[0002]

2. Description of the Related Art FIG. 2 is a view showing an attached state of a conventional coaxial connector (SMA connector).

The coaxial connector 4 includes a shell 4a and a shell 4a.
a, and made of an insulating resin 4b protruding from the flange 4c and having the flange 4c as a contact surface.
It is attached to a case 2 containing a substrate 3 and the like with bolts 5.

[0004]

When the coaxial connector 4 is mounted on the case 2, a high-frequency signal leaks from a small gap between the case 2 and the flange 4c. Or a conductive rubber is sandwiched between the case 2 and the flange 4c.

Further, since the point at which the flange 4c contacts the case 2 is uncertain, the high-frequency reflection / transmission characteristics are poor.

An object of the present invention is to provide a coaxial connector in which leakage of a high-frequency signal from a gap between a case and a flange is reduced and contact between the case and the flange is reliable.

[0007]

The coaxial connector of the present invention has an annular notch formed at the inner edge of the flange, the thickness is slightly larger than the depth of the notch, and the inner diameter is slightly smaller than the inner diameter of the shell. And a metal contact ring fitted with the notch.

In the coaxial connector, since the contact ring is attached to the case in contact with the case, leakage of a high-frequency signal from a gap with the case is reduced, and reflection of high-frequency power is reduced.

If only the contact ring is gold-plated, the cost of gold plating is reduced.

Further, the insulating resin is prevented from coming off by making the step portion of the insulating resin abut against the contact ring.

As in the case of the present invention, there is also a connector in which a ring is provided in the shell, but this stops the insulating resin, and is not sandwiched between the flanges. The problem of the present invention cannot be solved because of the bite.

[0012]

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

FIG. 1 is a view showing a state in which a coaxial connector according to an embodiment of the present invention is attached to a case.

In the coaxial connector 1 of this embodiment, an annular notch 1d is formed at the inner edge of the flange 1c, and the thickness of the notch 1d is slightly larger than the depth of the notch 1d, and the inner diameter is larger than the inner diameter of the shell 1a. A slightly smaller annular contact ring 1e made of metal is fitted. The contact surface of the contact ring 1e with the case 2 is plated with gold. The insulating resin 1b pressed into the shell 1a is pressed against the contact ring 1e and protrudes from the shell 1a. Although exaggerated in FIG. 1, the flange 1 of the contact ring 1e is not shown.
The protrusion amount from c is about 50 to 100 μm.

Accordingly, in the present coaxial connector 1, since the contact ring 1e is mounted in contact with the case 2, leakage of high-frequency signals from the gap with the case 2 is reduced, reflection of high-frequency power is reduced, and gold plating cost is reduced. Thus, the insulating resin 1b is prevented from coming off.

The present invention can be applied to other coaxial connectors such as a BNC connector and an N-type connector.

[0017]

As described above, the present invention has the following effects. (1) Leakage of high-frequency signals from the gap between the case and the flange is reduced. (2) Since the contact surface between the case and the flange is specified,
The reflection of high frequency power is reduced, and the transmission loss is also reduced. (3) Only the ring which is the contact surface needs to be plated with gold, so that plating cost can be reduced. (4) The insulating resin can be prevented from coming off at the same time.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a coaxial connector according to an embodiment of the present invention.

FIG. 2 is a partial sectional view of a conventional example of a coaxial connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High frequency connector 1a Shell 1b Insulating resin 1c Flange 1d Notch 1e Contact ring 2 Case 3 Substrate

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-36451 (JP, A) JP-A-9-129316 (JP, A) Japanese Utility Model Showa 57-136187 (JP, U) Japanese Utility Model Showa 61- 144585 (JP, U) JP-A-3-88286 (JP, U) JP-A 4-2485 (JP, U) (58) Fields investigated (Int.Cl. ⁶ , DB name) H01R 17 / 04,17 / 12,13 / 73

Claims (3)

(57) [Claims] 1. A shell and a press fit inside the shell,
It is composed of insulating resin protruding from the flange.
In the coaxial connector attached to the case as a contact surface , an annular notch is formed at an inner edge of the flange, the thickness is slightly larger than the depth of the notch, and the inner diameter is slightly smaller than the inner diameter of the shell. A coaxial connector comprising a metal contact ring that mates. 2. The contact ring is gold-plated.
The coaxial connector according to claim 1. 3. The coaxial connector according to claim 1, wherein a step portion of the insulating resin that is press-fitted into the shell and protrudes from the flange abuts on the contact ring.