CN2468179Y - Filtering devices for cable connectors - Google Patents

Abstract

A filter device for a cable connector, comprising a hollow cylindrical ferromagnetic core sheathed outside the cable and a protective cover covering the ferromagnetic core. The protective cover is formed by a pair of fastening upper and lower shells which are engaged with each other. The two shells have a symmetrical structure, and both include a main body and a tapered neck. The inner surface of the cylindrical main body is arranged with several ribs at intervals along the axial direction. The ribs in the middle are supporting ribs, and the ribs on both sides have oblique angles. shaped top, so as to elastically clamp the contained ferromagnetic core. The two ends of the housing are respectively provided with semicircular grooves, and a number of serrated convex strips are evenly distributed on the grooves to clamp the cables.

Description

Filtering devices for cable connectors

The utility model relates to a filtering device, in particular to a filtering device used for a cable connector.

In order to solve the problem of signal crosstalk of cable connectors, the industry usually adopts the technology of installing a filtering device at an appropriate position of the cable to achieve the purpose of filtering noise. The existing filtering device includes a ferromagnetic core ring and an insulating casing sheathed on its outside. The casing can protect and fix the ferromagnetic core ring so that the positional relationship between the ferromagnetic core ring and the cable will not change. The combination of the ferromagnetic core ring and the insulating shell generally has two ways: detachable and integral. In the detachable filter device, two housings are interlocked into one body, and the ferromagnetic core ring is accommodated in the housing. However, although such existing structures can accommodate the ferromagnetic core ring in the housing, they cannot prevent the ferromagnetic core ring from moving relative to the housing. In severe cases, the outer combined housing will loosen due to the large shaking of the ferromagnetic core ring. At the same time, the relative movement of the ferromagnetic core ring will also seriously weaken its noise filtering effect. However, the integrated filter device formed by integral injection molding of the shell, ferromagnetic core ring and cable cannot ensure product quality because it is formed in one process, and it is difficult to disassemble, which makes it difficult for subsequent rework, thus making the product more stable. Processing costs increase.

Therefore, there is a need for an improved filter device for a cable connector, so that the combination of the shell, the ferromagnetic core ring and the cable is stable, and then a good filter effect is achieved.

The main purpose of the utility model is to provide a filter device for cable connectors. The filter device is provided with elastic support ribs to make the combination of the ferromagnetic core ring and the insulating shell more stable, thereby achieving a good filter effect.

Another object of the present invention is to provide a filter device for cable connectors. The two ends of the filter device have sawtooth-shaped convex strips, so that the clamping and positioning of the cable and the cable are more accurate, thereby ensuring a better filtering effect. .

In order to achieve the above purpose, the filter device of the present invention includes a hollow cylindrical ferromagnetic core and an insulating protective cover covering the ferromagnetic core. The hollow cylindrical ferromagnetic core is wrapped outside the cable for Eliminate noise. The insulating protection cover is composed of an upper shell and a lower shell, and an accommodation space is provided inside to accommodate a hollow cylindrical ferromagnetic core. The two shells are symmetrical in structure, and both include a columnar main body and a tapered neck. Several ribs are uniformly arranged on the inner surface of the main body, wherein the ribs in the middle are supporting ribs, and the ribs on both sides are beveled. The elastic supporting ribs on the top are used to elastically clamp the ferromagnetic core. The front and rear ends of the shell are respectively provided with semicircular grooves, and several serrated convex strips are evenly distributed on the semicircular grooves, which are used to clamp the built-in cables. A pair of prongs are alternately arranged on one side of the butt joint surfaces of the two shells, and the two shells are integrated to form a protective cover for the ferromagnetic core by plugging the pins into the corresponding slots of the butt shells.

Due to the adoption of the above solution, the filter device of the present invention not only makes the combination of the casing, the ferromagnetic core and the cable more stable, but also has a single part to facilitate production management.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a three-dimensional exploded view of the filter device of the present invention.

Fig. 2 is a three-dimensional combined view of the filter device of the present invention.

Fig. 3 is a cut perspective view of the filter device of the present invention.

Fig. 4 is a left side view of the lower housing of the protective cover shown in Fig. 1 .

Fig. 5 is a top view of the lower housing of the protective cover shown in Fig. 1 .

Fig. 6 is a front view of the lower case of the protective cover shown in Fig. 5 .

Fig. 7 is a cross-sectional view of Fig. 6 along line A-A.

Fig. 8 is a cross-sectional view of Fig. 6 along line B-B.

FIG. 9 is a cross-sectional view of FIG. 6 along line C-C.

Please refer to FIG. 1 and FIG. 2 , the filter device 100 of the present invention includes a hollow cylindrical ferromagnetic core 10 and an external insulating protective cover 20 . The hollow cylindrical ferromagnetic core 10 is a ferroferric oxide core, which is wrapped around the cable 200 to eliminate noise from the cable connector (not shown). The insulating protective cover 20 of the filter device 100 is wrapped around the ferromagnetic core 10 to hold and protect the ferromagnetic core 10 at a proper position of the cable 200 . The insulating protective cover 20 is composed of upper and lower symmetrical half-shells 21 , 22 , and a receiving space 29 is provided therein for receiving the hollow cylindrical ferromagnetic core 10 .

Please refer to Fig. 3, Fig. 4 and Fig. 5 together. The lower housing 22 includes a main body 23 and a tapered neck 24. The main body 23 is hollow and semi-cylindrical, and four protruding ribs 231 are evenly arranged on its inner wall. 232, a pair of protruding ribs in the middle are supporting ribs 232, and the top of the pair of supporting ribs 232 is a slightly inclined contact surface to support the accommodated ferromagnetic core 10, and the protruding ribs on both sides are elastic with sharp angles at the top. The ribs 231 are used to elastically support the ferromagnetic core 10 while positioning it accurately and preventing it from sliding. The front wall 251 and the rear wall 252 of the lower housing 22 are evenly arranged with a plurality of serrated protrusions 254 along the semicircular groove 253 for holding the cable 200 of the cable connector. An abutting rib 28 is formed between the main body 23 and the tapered neck 24 of the lower case 22 to hold and position the hollow cylindrical ferromagnetic core 10 . Please refer to FIG. 6 to FIG. 9 , a pair of prongs 233 extend vertically from one side of the mating surface 30 of the lower housing 22 , and the tops of the prongs 233 are barb-shaped. On the other side opposite to the pair of pins 233, a pair of slots 235 are arranged at intervals along the axial direction, so as to be inserted into the corresponding pins 211 (FIG. 1) of the upper housing 21, thereby fixing the upper and lower housings 21 , 22 as one. A long pin groove 236 is provided between the two pins 233 on the mating surface 30, and a strip-shaped pin edge 234 is formed on the opposite side of the pin groove 236. The pin slots 236 and the pin ribs 234 are engaged with each other. The front wall 251 and the rear wall 253 of the lower housing 22 are also respectively provided with a pair of guiding posts 26 and locking slots 27 on their mating surfaces 30 . The guiding posts 26 and the pins 233 are located on the same side.

When assembling, please continue to refer to the first figure, first place the hollow cylindrical ferromagnetic core 10 on the cable 200 of the cable connector, and then place the ferromagnetic core 10 and the cable 200 on the protective cover 20 Inside the lower casing 22 , at this moment, one end of the ferromagnetic core 10 is against the rear wall 252 of the lower casing 22 , and the cables 200 protrude from the two semicircular grooves 253 respectively. Finally, the upper and lower casings 21 and 22 are buckled together by connecting each guide column 26 with the corresponding slot 27 and each pin 233 with the corresponding slot 235 . Since the tops of the elastic ribs 231 have sharp angles, when the upper and lower housings 21, 22 are buckled, the four elastic ribs 231 of the upper and lower housings 21, 22 are holding the hollow cylindrical ferromagnetic core 10 A radial force is formed, which not only firmly clamps the ferromagnetic core 10 at the center of the upper and lower housings 21 and 22 , but also makes the engagement between the pin 233 and the slot 235 more reliable. At the same time, the clamped cable 200 can be positioned accurately through the engagement of the two semicircular grooves 253 and the upper serrated ridge 254, so that the relative position between the cable 200 and the ferromagnetic core 10 is fixed. , in order to achieve a better filtering effect.

Claims (7)

1. filter is used on the wire and cable connector to get rid of noise, and it comprises that one is located on the hollow cylindrical ferromagnetic core and a protective cover of appropriate position, the cable outside, and this protective cover is coated on the ferromagnetic core outside; It is characterized in that: be furnished with some prominent ribs on the cylindrical inner wall of protective cover at interval and reach fixedly ferromagnetic core in order to support; wherein Zhong Bu prominent rib is a ribs; the prominent rib of ribs both sides is the elastic ribs with tip-angled shape top, but this elastic rib elasticity is supported ferromagnetic core, and makes its accurate positioning.

2. filter according to claim 1 is characterized in that: the top of ribs has a contact-making surface that inclination arranged slightly.

3. filter according to claim 2 is characterized in that: protective cover is made up of upper and lower two housings of symmetrical configuration.

4. filter according to claim 3 is characterized in that: on the front and back walls of protective cover, is respectively equipped with a groove, evenly is furnished with some dentation raised lines in this groove, but the cable of this raised line clamping, fixed cable connector.

5. filter according to claim 4 is characterized in that: a side of each housing interface is arranged at intervals with some pins, and relative opposite side then is arranged at intervals with some slots, with the slot and the pin buckle of another housing that docks.

6. filter according to claim 5 is characterized in that: on interface, offer a cotter way between adjacent two pins, the corresponding bar shaped pin rib that forms of the opposite side of this cotter way, cotter way and pin rib can with dock housing on sell rib and cotter way clamping accordingly.

7. filter according to claim 6 is characterized in that: the interface of protective cover front and back walls is respectively equipped with draw-in groove and guide posts, with dock housing on the guide posts of relative set and draw-in groove engage.

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