JP3160932U - Electrical ground connection device - Google Patents

Abstract

An electrical ground connection device capable of ensuring the quality of signal transmission and good electrical characteristics is provided. A coaxial air core includes an outer sleeve, a nut, and a conductive ground spring. The inner sleeve 21 has an outer convex edge 22 at the front end, an annular concave groove 24 inside the outer convex edge, a thread portion 281 and a receiving groove 282 inside the nut, Is coupled to the screw interface connecting device of the electronic device, and the receiving groove receives the outer convex edge of the inner sleeve. The conductive grounding spring is disposed in the annular groove of the inner sleeve, and when screwing the threaded portion of the nut to the screw interface connecting device of the electronic device, the plurality of elastic inner arc portions of the conductive grounding spring and the screw interface connecting device The peripheral edges of are mechanically and electrically connected. [Selection] Figure 2

Description

The present invention relates to a connection device, and more particularly to an electrical connection device having a grounding effect.

The coaxial cable connection device is knowledge that everyone knows. A typical coaxial cable connection device is connected to an electronic device having a screw interface connection device, and the coaxial cable and various electronic devices are electrically integrated.

Conventional connection devices for coaxial cables have several drawbacks. The main action of the coaxial connection device is to ensure good ground contact between the connection device body and the interface connection device. The problems of the prior art of the coaxial connection device are related to whether the grounding property of the connection device main body is good or bad. That is, the grounding property between the connection device body and the interface connection device. The F-type connecting device shown in FIG. 1 is a typical example of a conventional connecting device. The F-type connecting device includes a connecting device main body 10, and the connecting device main body 10 is rotatable around an outer sleeve 11, an inner sleeve 12 disposed coaxially within the outer sleeve 11, and an inner sleeve 12. A nut 13. The connection device body 10 can mechanically and electrically connect the coaxial cable to the screw interface connection device 15 of the electronic device 14.

The F-type connecting device main body 10 and the screw interface connecting device 15 have one problem in connecting them. That is, the nut 13 cannot be completely connected to the screw interface connecting device 15, and a non-contacting gap S is generated between the inner sleeve 12 and the screw interface connecting device 15. As a result, the grounding property of the screw interface connecting device 15 is deteriorated, and the electric signal transmission performance is lowered. Therefore, it is necessary to overcome the poor contact between them.

Therefore, the connection device currently required can effectively and long-term guarantee the ground contact between the connection device main body and the screw interface connection device, and ensure good electrical characteristics.

In the present invention, a strong ground contact is made between the screw interface connection device of the electronic device by the conductive ground spring provided in the inner sleeve and the thread portion of the nut. An object of the present invention is to provide an electrical ground connection device capable of ensuring the characteristics.

In order to achieve the above-mentioned objects and effects, an electrical ground connection device according to the present invention is constituted by an outer sleeve, a nut, and a conductive ground spring in a coaxial air core. The front end of the inner sleeve has an outer convex edge, the outer convex edge has an annular concave groove, the nut has a screw thread portion and a receiving groove, and the screw thread portion of the electronic device Coupled with the screw interface connecting device, the receiving groove receives the outer convex edge of the inner sleeve. The conductive grounding spring is disposed in the annular groove of the inner sleeve, and when screwing the threaded portion of the nut to the screw interface connecting device of the electronic device, the plurality of elastic inner arc portions of the conductive grounding spring and the screw interface connecting device The peripheral edges of are mechanically and electrically connected.

It is sectional drawing which showed the state which the conventional coaxial connection apparatus and the screw interface connection apparatus of an electronic device have not yet connected completely. 1 is a perspective cross-sectional view illustrating an electrical ground connection device according to Embodiment 1 of the present invention. It is sectional drawing which showed the electrical ground connection apparatus by Example 1 of this invention. It is the perspective view which showed the electrically conductive grounding spring by Example 1 of this invention. It is explanatory drawing which showed the left side of the electrically conductive grounding spring by Example 1 of this invention. It is sectional drawing which showed the state which connected the electrical ground connection apparatus by Example 1 of this invention with the screw interface connection apparatus of the electronic device. It is sectional drawing which showed the electrical ground connection apparatus by Example 2 of this invention. It is the perspective view which showed the conductive grounding spring by Example 2 of this invention. It is sectional drawing which showed the state which connected the electrical ground connection apparatus of FIG. 7 to the screw interface connection apparatus of the electronic device.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

2 and 3 are a perspective sectional view and a sectional view of the electrical ground connection device according to the first embodiment of the present invention. The electrical ground connection device 20 includes an inner sleeve 21, an outer sleeve 25, and a conductive ground spring 30. Among them, the front end of the inner sleeve 21 has an outer convex edge 22, and the outer diameter and wall thickness of the rear end extending portion 23 are smaller than the outer convex edge 22. Inside the outer convex edge 22, there is an annular groove 24 for accommodating the conductive ground spring 30, the front end of the annular groove 24 has an annular locking portion 241, and the conductive ground spring 30 is connected to the annular groove. 24 can be arranged. The outer sleeve 25 has an inner concave edge 26 surrounding the inner sleeve 21 at the front end, the outer diameter and wall thickness of the rear end extending portion 27 are smaller than the inner concave edge 26, and the rear end extending portion 27 is A concentric surrounding relationship is formed with the rear end extending portion 23 of the sleeve 21, and the middle is an annular air core. A nut 28 is provided at the front end of the electrical ground connection device 20, and the end thereof is connected to the outer convex edge 22 of the inner sleeve 21 by a roller system, and is freely rotated on the outer convex edge 22 of the inner sleeve 21. Can do. The nut 28 has a threaded portion 281 and a receiving groove 282. The threaded portion 281 can be screwed onto the screw interface connecting device of the electronic device, and the receiving groove 282 is formed outside the inner sleeve 21. The convex edge 22 can be accommodated. In practice, a connection interface such as an F type, a TNC type, an SMA type, or an N type can be used for the nut 28.

As shown in FIGS. 4 and 5, the conductive grounding spring 30 includes a front annular end 31 and a rear annular end 32 that are in contact with the inner surface of the annular groove 24 of the inner sleeve 21, and front and rear annular ends 31. , 32 and a plurality of sheet-like elastic inner arc portions 33 integrally formed. The plurality of elastic inner arc portions 33 are formed between the front and rear annular end portions 31 and 32 at equal intervals. The length of the conductive ground spring 30 is shorter than the annular groove 24.

Each elastic inner arc part 33 and the screw interface connection device 41 of the electronic device 40 are mechanically and electrically connected (shown in FIG. 6).

As shown in FIG. 6, when the nut 28 of the electrical ground connection device 20 is screwed into the screw interface connection device 41 of the electronic device, each elastic inner arc portion 33 of the conductive ground spring 30 is spiraled by the screw interface connection device 41. The inner sleeve 21 and the screw interface connecting device 41 are mechanically and electrically connected to each other, and the mechanical and electrical connection between the inner sleeve 21 and the screw interface connecting device 41 is ensured effectively and for a long time, and a good ground contact is made. The quality of signal transmission and good electrical characteristics can be ensured.

7 and 8 show an electrical ground connection device 50 according to Embodiment 2 of the present invention. The constituent members are the same as those of the first embodiment shown in FIGS. 2 and 3, except for the structure of the conductive ground spring 51. The conductive ground spring 51 includes an annular main body 52 that contacts the inner surface of the annular concave groove 24 of the inner sleeve 21, and a plurality of sheet-like elastic inner arc portions 53 that are integrally formed with the annular main body 52. The plurality of elastic inner arc portions 53 are formed around the annular main body 52 at equal intervals.

The elastic inner arc portion 53 is curved inward from the end of the annular body 52, whereby each elastic inner arc portion 53 is spirally pushed by the screw interface connecting device 41, and the gaps are stuck and connected. (Illustrated in FIG. 9).

20 Electrical ground connection device 21 Inner sleeve 22 Outer convex edge 23 Rear end extending portion 24 Annular groove 241 Annular locking portion 25 Outer sleeve 26 Inner concave edge 27 Rear end extended portion 28 Nut 281 Threaded portion 282 Housing groove 30 Conductive grounding Spring 31 Front annular end 32 Rear annular end 33 Elastic inner arc portion 40 Electronic device 41 Screw interface connection device 50 Electrical ground connection device 51 Conductive ground spring 52 Annular body 53 Elastic inner arc portion

Claims (3)

In an electrical ground connection device for mechanically and electrically coupling a coaxial cable to a screw interface connection device of an electronic device,
The electrical ground connection device includes a coaxial air core, an outer sleeve, a nut, and a conductive ground spring.
The front end of the inner sleeve has an outer convex edge, the inside of the outer convex edge has an annular groove,
The inside of the nut includes a screw thread portion connected to a screw interface connecting device of an electronic device, and a receiving groove for receiving an outer convex edge of the inner sleeve,
The conductive grounding spring is disposed in the annular groove of the inner sleeve, and the conductive grounding spring has a plurality of elastic inner arc portions, mechanically and with a peripheral edge of the screw interface connecting device of the electronic device, and An electrical ground connection device, wherein the electrical ground connection device is electrically connected closely. The conductive ground spring is formed by integrally forming front and rear annular ends and a plurality of inner arc-shaped portions, and the elastic arc-shaped portion is formed between the front and rear annular ends. The electrical ground connection device according to claim 1. 2. The conductive ground spring according to claim 1, wherein an annular main body and an elastic inner arc portion are integrally formed, and each elastic inner arc portion is curved inward from an end of the annular main body. Electrical ground connection device.