CN215815280U

CN215815280U - RFID feeder

Info

Publication number: CN215815280U
Application number: CN202121738158.0U
Authority: CN
Inventors: 刘振武; 韦锋; 蔡唯佳
Original assignee: Shenzhen Megmeet Electrical Co Ltd
Current assignee: Shenzhen Megmeet Electrical Co Ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-02-11
Anticipated expiration: 2031-07-28

Abstract

The embodiment of the utility model relates to the technical field of coaxial cables and discloses an RFID (radio frequency identification) feeder line. The RFID feeder comprises a cable, a cable protective sleeve and a connector; the cable is used for transmitting signals; the cable protective sleeve is wrapped outside the cable; the bottom end of the connector is connected with the tail end of the cable; the top end of the connector, which is separated from the tail end of the cable, is provided with a contact pin and a connecting and fixing part; the contact pin is positioned in a space surrounded by the connecting and fixing part; the connecting and fixing part is provided with a structure matched with the signal output end of the external equipment and used for fixing the connector on the signal output end; the contact pin is inserted into the signal output end to establish electrical connection when the connector is fixed on the signal output end. The RFID feeder is wrapped on the cable through the cable protective sleeve so as to improve the anti-extrusion strength of the RFID feeder; the shielding layer is folded and fixed through the gasket matched with the bushing and the rubber body, the tensile strength of the RFID feeder line is improved, and impurities are prevented from entering the connector to cause blockage.

Description

RFID feeder

Technical Field

The utility model relates to the technical field of coaxial cables, in particular to an RFID (radio frequency identification) feeder line.

Background

As one of important elements for transmitting high-Frequency electric signals, an rfid (radio Frequency identification) feeder is widely used as a signal transmission line between a base station transmitter, a receiver, radio communication devices or in the high-Frequency field of a system of radio communication, microwave transmission, broadcast communication, or the like; because copper has good physical and chemical properties, the cables of the RFID feeder which are widely used at present are basically copper.

Copper coaxial cables have a relatively high density, and therefore, have high requirements for the installation and fixation of the cables. Generally, the RFID feeder is used in an outdoor environment, and the RFID feeder is required to be capable of bearing a certain tensile force, so that connectors at two ends of the feeder do not fall off or are damaged by extrusion after the RFID feeder is subjected to an external force, and normal transmission of equipment signals on the RFID feeder is ensured.

When the RFID feeder line is installed, the situation that impurities such as sand, mud and the like enter the connector is inevitable. The connector for the feeder line in the market at present mainly is a structure with a pin at one end and an inner hole at the other end, and the connector is directly sleeved on a shielding layer.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an RFID feeder with anti-blocking, anti-extrusion, and anti-pulling properties.

In order to solve the above technical problem, one technical solution adopted by the embodiment of the present invention is:

an RFID feed, comprising: a cable for carrying a signal; a cable protective sheath wrapped around the cable; and a connector; the bottom end of the connector is connected with the tail end of the cable; the top end of the connector, which is separated from the tail end of the cable, is provided with a contact pin and a connecting and fixing part; the contact pin is positioned in a space surrounded by the connecting and fixing part; the connecting and fixing part is provided with a structure matched with a signal output end of external equipment and used for fixing the connector on the signal output end; and the contact pin is inserted with the signal output end to establish electric connection when the connector is fixed at the signal output end.

In one embodiment, the cable comprises: the inner conductor, the insulating layer, the shielding layer and the protective layer; the inner conductor is coated in the insulating layer, the insulating layer is coated in the shielding layer, and the shielding layer is coated in the protective layer; the cable protective sheath is wrapped around at least a portion of the protective layer.

In one embodiment, the connector comprises: a connector body extending in an axial direction, the connector body having the bottom end and the top end formed at both ends thereof, respectively; a bushing received in the bottom end; the bushing is provided with a wedge-shaped protrusion extending outwards, and the wedge-shaped protrusion is inserted between the insulating layer and the shielding layer so as to enable the shielding layer to be folded along the surface of the bushing; the rubber body is abutted to the lining, so that the part of the shielding layer, which is folded along the surface of the lining, is fixedly connected with the lining.

In one embodiment, the connector further comprises: a washer disposed between a surface of the bushing and the rubber body; the shielding layer is sandwiched between the gasket and the rubber body along a portion of the bushing folded over along the surface.

In one embodiment, the top end of the contact pin is plugged with the signal output end; the bottom end of the contact pin is provided with a counter bore with a preset depth, and the counter bore is formed along the axial direction of the contact pin; the inner conductor is accommodated in the counter bore and electrically connected with the contact pin.

In one embodiment, the connector body comprises: a housing; the two ends of the shell are opened, and an accommodating cavity with two through ends is formed inside the shell; the inserting pin, the bushing, the gasket and the rubber body are contained and fixed in the containing cavity.

In one embodiment, the connection fixing part includes: a first nut; the first nut is fixed at the first end of the shell; at least one part of the contact pin is positioned in the inner space enclosed by the first nut.

In one embodiment, the connector body further comprises: a second nut; the second nut is fixed at the second end of the shell and fixedly connected with the cable.

In one embodiment, the cable protective sheath comprises: two EPDM rubber layers; and the polyester threads are positioned between the two EPDM rubber layers.

In one embodiment, the RFID feed line further comprises a sleeve; the sleeve is arranged at two ends of the cable protective sleeve and used for limiting the cable protective sleeve to slide on the surface of the cable.

The utility model has the beneficial effects that: the cable protective sleeve is wrapped on the cable to improve the anti-extrusion strength of the RFID feeder line; the shielding layer is folded and fixed through the gasket matched with the bushing and the rubber body, the tensile strength of the RFID feeder line is improved, and impurities are prevented from entering the connector to cause blockage.

Drawings

One or more embodiments are illustrated in drawings corresponding to, and not limiting to, the embodiments, in which elements having the same reference number designation may be represented as similar elements, unless specifically noted, the drawings in the figures are not to scale.

FIG. 1 is a schematic view of an assembly of an RFID feed line provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a cable configuration provided by an embodiment of the present invention;

FIG. 3 is a schematic structural view of a cable protective sheath provided by an embodiment of the utility model;

FIG. 4 is a schematic structural diagram of a connector provided by an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a pin according to an embodiment of the present invention.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model is described in more detail below with reference to the accompanying drawings and specific examples. It is noted that when an element is referred to as being "secured to"/"mounted to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. As used in this specification, the terms "upper," "lower," "inner," "outer," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the utility model and simplicity in description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and are not to be considered limiting of the utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the technical features mentioned in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, 4, and 5, the RFID feed line 100 includes: a cable 10, a cable protective sheath 20 and a connector 30.

Wherein, the cable 10 is used for transmitting signals;

the cable protective sheath 20 is wrapped outside the cable 10;

the bottom end of the connector 30 is connected with the end of the cable 10; the connector 30 has a pin 305 and a connection fixing part at the top end separated from the end of the cable 10;

the contact pin 305 is located in a space surrounded by the connecting and fixing part;

the connection fixing portion has a structure adapted to a signal output terminal of the external device, for fixing the connector 30 on the signal output terminal;

the pins 305 mate with the signal output terminals to establish electrical connection when the connector 30 is secured to the signal output terminals.

As shown in fig. 2, the cable 10 is a coaxial cable, and includes an inner conductor 11, an insulating layer 12, a shielding layer 13, and a protective layer 14 in this order from inside to outside in the radial direction.

The inner conductor 11 is wrapped in the insulating layer 12, the insulating layer 12 is wrapped in the shielding layer 13, and the shielding layer 13 is wrapped in the protective layer 14.

The cable jacket is wrapped around at least a portion of the protective layer 14.

In some embodiments, as shown in fig. 3, the cable protective sheath 20 includes two layers of EPDM rubber layer 21 and strands of polyester thread 22,

a plurality of strands of polyester strands 22 are disposed between the two layers of EPDM rubber layer 21.

In some embodiments, as shown in fig. 4, the connector 30 specifically includes: the connector comprises a connector body 301, a first insulator 302, a first sealing ring 303, a snap spring 304, a pin 305, a second insulator 306, a bushing 307, a gasket 308, a rubber body 309 and a second sealing ring 310.

Specifically, the connector body 301 extends along the axial direction, and forms a bottom end connected to the end of the cable 10 and a top end connected to the signal output end at two ends thereof.

The bushing 307 is housed at the bottom end of the connector body 301; the bushing 307 has a wedge-shaped protrusion 3071 extending outward, and the wedge-shaped protrusion 3071 is interposed between the insulating layer 12 and the shielding layer 13 to turn the shielding layer 13 along the surface of the bushing 307.

Rubber 309 abuts bushing 307, so that the portion of shield layer 13 folded along the surface of bushing 307 is fixedly connected to bushing 307.

A washer 308 is disposed between the surface of the bushing 307 and the rubber body 309.

The portion of the shield layer 13 folded back along the surface of the bush 307 is sandwiched between the gasket 308 and the rubber body 309.

More specifically, the connector body 301 includes a housing 3011, a first nut 3012, and a second nut 3013.

The housing 3011 has openings at both ends, and has a receiving chamber formed therein, in which the first insulator 302, the pin 305, the second insulator 306, the bushing 307, the gasket 308, the rubber 309, and the second seal ring 310 are received and fixed.

The diameter of the first end of the housing 3011 is smaller than the diameter of the second end.

At the first end port, a flange 3011a formed around the inner wall of the first end port is provided.

The outer surface of the first insulator 302 is provided with a positioning step matched with the flange 3011a, the flange 3011a limits the axial sliding of the first insulator 302 relative to the shell 3011, and the first insulator 302 is fixed at the first end of the shell 3011; in addition, the first insulator 302 is provided with a first through hole along the axis.

The outer surface of the first end of the casing 3011 is provided with a first groove, and the first nut 3012 is provided with a second groove.

The first nut 3012 and the first end of the casing 3011 are closed by the first groove and the second groove to form a sealed space for the built-in snap spring 304, and the casing 3011 and the first nut 3012 are fixedly connected by the snap spring 304.

The outer surface of the first end of the housing 3011 and the inner surface of the first nut 3012 form an annular gap that is adapted to a signal output terminal (or a signal input terminal) of an external device, and in the annular gap, the first seal ring 303 is placed.

At a second end of the housing 3011, a first end face 3011a and a second end face 3011b for positioning are provided inside the second end.

The second insulator 306 abuts on the first end face 3011 a; the bushing 307 abuts on the second end face 3011b and is in close contact with a partial end face of the second insulator 306.

The second insulator 306 has a second through hole coaxial with the first through hole of the first insulator 302 along the axis.

A second insulator 306, a bushing 307, a washer 308, a rubber 309, and a second seal ring 310 are fixed in this order to a port at a second end in the axial direction of the casing 3011.

The inner wall of the port of the second end is provided with threads to fix the second nut 3013.

The second sealing ring 310 is arranged between the rubber body 309 and the end face of the second nut 3013; the cable 10 passes through the second nut 3013 to form a fixed connection with the connector 30.

A second nut 3013 is screwed to the inner side of the second port, so that the second nut 3013 can be fixedly connected to the second end of the casing 3011.

When the second nut 3013 is screwed to the housing 3011, the second nut is abutted against the second seal ring 310; with the second nut 3013 screwed into the casing 3011, a pre-tightening force is generated between the second insulator 306, the bushing 307, the washer 308, the rubber 309 and the second sealing ring 310.

The pre-tightening force presses the second insulator 306, the bushing 307, the washer 308, the rubber body 309 and the second seal ring 310 against each other.

Further, as shown in fig. 5, the pin 305 includes a top end 3051, a connecting portion 3052 and a bottom end 3053.

The top end 3051 extends outward from one end surface of the connecting portion 3052 along the axis of the connecting portion 3052; on the other end face of the link 3052 away from the top end 3051, a bottom end 3053 extends outward from the end face along the axis of the link 3052.

To facilitate the insertion with the signal output terminal (or signal input terminal) of the external device, the diameter of the top end 3051 is set to be smaller than the diameter of the coupling 3052, and the length of the coupling 3052 is made equal to the length of the first through hole.

The diameter of the coupling 3052 is configured to be smaller than the diameter of the bottom end 3053 to form a locating shoulder at the junction of the coupling 3052 and the bottom end 3053.

The connection part 3052 is accommodated in the first through hole; at least a part of the bottom end 3053 is received in the second through hole, and the pin 305 is fixed to the end face of the first insulator 302 by a positioning shoulder formed at the connection between the connection part 3052 and the bottom end 3053.

The top end 3051 of pin 305 is mated with a signal output (or signal input) to form an electrical connection.

The bottom end 3053 of the pin 305 is provided with a counter bore 3053a with a preset depth, and the counter bore 3053a is formed along the axial direction of the pin 305.

Inner conductor 11 is received in counterbore 3053a and is electrically connected to pin 305.

At least a portion of the pin 305 is located within the interior space enclosed by the first nut 3012.

When impurities such as sand, slurry and the like are mixed, the top end 3051 of the inserting pin 305 is needle-shaped, so that the inserting pin is easy to clean.

In some embodiments, the RFID feed 100 further includes sleeves 40, the sleeves 40 being disposed at both ends of the protective sheath 20 of the cable 10 for limiting the sliding of the cable protective sheath 20 over the surface of the cable 10.

As shown in fig. 1 to 4, the assembly process of the RFID feed line 100 provided in the present embodiment is as follows:

before the equipment, earlier with cable protective sheath 20 cover on cable 10, fix the both ends of cable protective sheath 20 on cable 10 with sleeve pipe 40, through the protection of cable protective sheath 20, can improve the anti extrusion ability of cable 10.

The protective layers 14 at both ends of the cable 10 are removed to expose the shielding layer 13.

The shield layer 13 is left and the insulating layer 12 under the shield layer 13 is removed to expose the inner conductor 11.

After the exposed inner conductor 11 passes through the second nut 3013, it is received in the counterbore 3053a of the pin 305, and the inner conductor 11 is welded to the pin 305.

The wedge-shaped protrusion 3071 of the bushing 307 is inserted between the insulating layer 12 and the shielding layer 13 of the cable 10.

The gasket 308 attaches the shielding layer 13 to the outer surface of the bushing 307, so that the shielding layer 13 is folded along the outer surface of the bushing 307 for the first time.

The shielding layer 13 is folded for the second time around the gasket 308, so that the gasket 308 is entirely enclosed in the shielding layer 13, and the rubber 309 is used to fix the shielding layer 13 between the gasket 308 and the rubber 309.

Through the above two folding, the pulling force between the cable 10 and the connector 30 can be made to almost act on the shielding layer 13 to improve the tensile strength of the RFID feeder line 100, and impurities, such as sand, slurry, etc., can be blocked from entering the counter bore 3053a of the pin 305 through the shielding layer 13, so as to avoid the impurities from attaching to the inner conductor 11.

The second nut 3013 is tightened to press the second insulator 306, the bushing 307, the washer 308, the rubber 309, and the second seal ring 310 against each other.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An RFID feed, comprising:

a cable for carrying a signal;

a cable protective sheath wrapped around the cable; and

a connector; the bottom end of the connector is connected with the tail end of the cable;

the top end of the connector, which is separated from the tail end of the cable, is provided with a contact pin and a connecting and fixing part;

the contact pin is positioned in a space surrounded by the connecting and fixing part;

the connecting and fixing part is provided with a structure matched with a signal output end of external equipment and used for fixing the connector on the signal output end;

and the contact pin is inserted with the signal output end to establish electric connection when the connector is fixed at the signal output end.

2. The RFID feed of claim 1, wherein the cable comprises: the inner conductor, the insulating layer, the shielding layer and the protective layer;

the inner conductor is coated in the insulating layer, the insulating layer is coated in the shielding layer, and the shielding layer is coated in the protective layer;

the cable protective sheath is wrapped around at least a portion of the protective layer.

3. The RFID feed line of claim 2, wherein the connector comprises:

a connector body extending in an axial direction, the connector body having the bottom end and the top end formed at both ends thereof, respectively;

a bushing received in the bottom end; the bushing is provided with a wedge-shaped protrusion extending outwards, and the wedge-shaped protrusion is inserted between the insulating layer and the shielding layer so as to enable the shielding layer to be folded along the surface of the bushing;

the rubber body is abutted to the lining, so that the part of the shielding layer, which is folded along the surface of the lining, is fixedly connected with the lining.

4. The RFID feed line of claim 3, wherein the connector further comprises:

a washer disposed between a surface of the bushing and the rubber body;

the shielding layer is sandwiched between the gasket and the rubber body along a portion of the bushing folded over along the surface.

5. The RFID feed of claim 4 wherein the pin has a tip that mates with the signal output;

the bottom end of the contact pin is provided with a counter bore with a preset depth, and the counter bore is formed along the axial direction of the contact pin;

the inner conductor is accommodated in the counter bore and electrically connected with the contact pin.

6. The RFID feed line of claim 5 wherein the connector body comprises: a housing;

the two ends of the shell are opened, and an accommodating cavity with two through ends is formed inside the shell;

the inserting pin, the bushing, the gasket and the rubber body are contained and fixed in the containing cavity.

7. The RFID feed line of claim 6 wherein the connection fixture comprises: a first nut;

the first nut is fixed at the first end of the shell; at least one part of the contact pin is positioned in the inner space enclosed by the first nut.

8. The RFID feed line of claim 6 wherein the connector body further comprises: a second nut;

the second nut is fixed at the second end of the shell and fixedly connected with the cable.

9. The RFID feed line of claim 1, wherein the cable protective sheath comprises:

two EPDM rubber layers;

and the polyester threads are positioned between the two EPDM rubber layers.

10. The RFID feed of claim 1, wherein the RFID feed further comprises a sleeve;

the sleeve is arranged at two ends of the cable protective sleeve and used for limiting the cable protective sleeve to slide on the surface of the cable.