CN213278609U

CN213278609U - Assembly structure of shield coaxial contact and conductor

Info

Publication number: CN213278609U
Application number: CN202021956149.4U
Authority: CN
Inventors: 郭进; 汪群; 吴文单
Original assignee: Guizhou Space Appliance Co Ltd
Current assignee: Guizhou Space Appliance Co Ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-05-25
Anticipated expiration: 2030-09-09

Abstract

The utility model discloses an assembly structure of shielding coaxial contact and wire, the wire internal conductor carries out the crimping equipment with the inner conductor of shielding coaxial contact, connects the shielding layer lamination of wire between a crimping section of thick bamboo and outer conductor, and oversheath and shielding layer are peeled off to the wire end to it carries out the end fixedly to overlap the pyrocondensation pipe. The assembly structure keeps the lead more than 50mm, ensures that the lead shielding layer can be clamped and fixed by the lead insulating layer and the outer sheath, and prevents the inner conductor from retreating due to external force; the outer sheath and the shielding layer are trimmed by 5mm at the tail end of the wire, and then a 15mm heat-shrinkable tube is sleeved to shrink and wrap the wire throwing tail end, so that the tail end of the wire is prevented from being reduced due to the effective gap between the trimmed shielding layer and the wire core wire, and even from being in lap joint short circuit.

Description

Assembly structure of shield coaxial contact and conductor

Technical Field

The invention belongs to the technical field of shielding coaxial contact spare point processing, and relates to an assembly structure of a lead.

Background

Due to the special structure of the shielding coaxial contact element, after the SFF and SYV series wires or the wires with similar structures are normally crimped, pinholes are easy to appear), and the conditions of wire core retreating and shielding short circuit occur, the main reason is that:

a. the shielding coaxial contact element comprises an inner conductor, an outer conductor, a front end dielectric body, a tail dielectric body and a crimping barrel, the adapting wire is SFF and SYV series as shown in figure 1, the structure of the wire is shown in figure 2, a wire core wire and the inner conductor are assembled in a crimping mode during assembly, and then the shielding layer is connected between the crimping barrel 1 and the outer conductor in a crimping mode. Because the inner conductor, the front end/tail dielectric body and the outer conductor are matched without a limiting structure at the outlet end, the cable can only be supported by the axial strength of the wire insulating layer 7 and the adhesive force among the wire insulating layer 7, the shielding layer and the outer sheath 9. When the length of the wire carried at the tail end of the contact is shorter, the adhesive force between the shielding layer and the outer sheath 9 and the insulating layer is smaller, and the inner conductor retreats more obviously.

b. When the tail end of the wire is trimmed, scissors or inclined-jaw pliers are generally used for trimming. Due to the special structure of the wire, as shown in fig. 2, when the shielding layer and the core wire are cut off during trimming, the force used is larger than that used for cutting off the sheath and the insulating layer, so that the shearing force is obviously changed during trimming, and the trimmed wire port is easy to deform, as shown in fig. 3, the effective gap between the core wire and the shielding layer after trimming becomes smaller, even the core wire and the shielding layer are overlapped together, and a short circuit is formed;

at present, the shielding coaxial contact spare point treatment in the industry is generally not to install the contact piece, and the hole position is left vacant or a corresponding sealing plug is used for assembling the hole position into a corresponding hole position). This process does not maintain the integrity of the connector and the moisture and dust tight seal. When the contact is required to be attached, the lead is attached after being pressed and trimmed off redundant lead. The process is easy to cause pin shrinkage holes) and short circuit, which leads to unqualified products.

Disclosure of Invention

The utility model discloses the technical problem who solves: a structure for shielding a coaxial contact and wire assembly is provided for addressing the problems of inner conductor pull back and short circuit of the core wire to the shield after trimming.

The technical scheme of the utility model:

the utility model provides an assembly structure of shielding coaxial contact and wire, the crimping equipment is carried out with the inner conductor of shielding coaxial contact to the wire heart yearn, connects the shielding layer lamination of wire between crimping section of thick bamboo and outer conductor, and the wire end is peeled off oversheath and shielding layer to cover pyrocondensation pipe 10 and carry out the end and fix.

The shielding coaxial contact element consists of an inner conductor, an outer conductor, a front end dielectric body, a tail dielectric body and a crimping barrel.

The wire comprises a core wire, a wire insulating layer, a shielding layer and an outer sheath from inside to outside in sequence.

The wire is retained for more than 50 mm.

The wire ends had a length of 5mm without an outer sheath and shielding.

The heat shrinkable tube 10 is 15mm long.

When the wire is required to be crimped at the empty point, the wire is crimped by more than 50mm according to the structure, then the wire is trimmed to be not less than 10mm in length, and the outer sheath 9 and the shielding layer are stripped at the tail end by 2-3 mm. And (4) without using the heat-shrinkable tube 10, filling the contact element into the corresponding hole position of the component, and then filling epoxy glue into the tail cover of the component to fix the tail end of the lead.

The technical innovation point is as follows:

a. the dead-spot shielding coaxial contact element is normally pressed and matched with a wire, but the wire is required to be reserved for more than 50mm, so that the shielding layer of the wire can be clamped and fixed by the wire insulating layer 7 and the outer sheath 9, and the inner conductor cannot retreat due to external force; the outer sheath 9 and the shielding layer are trimmed by 5mm at the tail end of the wire, and then a 15mm heat-shrinkable tube 10 is sleeved to shrink the wire throwing tail end, so that the tail end of the wire is prevented from being reduced due to the effective clearance between the trimmed shielding layer and the wire core wire, and even from being in lap short circuit.

b. When a wire needs to be crimped at a vacant point, but the wire is not allowed to extend out of a tail cover of the component, a wire with the length of 50mm is crimped normally, the inner conductor is checked to have no backward phenomenon after crimping is finished, then the wire is trimmed and kept to be not less than 10mm in length, meanwhile, the outer sheath 9 and the shielding layer are trimmed by 2-3mm, then the contact element is normally installed in a corresponding hole position of the component, and the inner conductor is not caused to retreat in the whole installation process. And then encapsulating epoxy glue in the tail cover of the component to fix the tail end of the lead, wherein the epoxy glue needs to exceed the tail end of the lead.

The utility model discloses an effect does:

a. the dead-spot shielding coaxial contact element is normally pressed and matched with the lead, but the lead is reserved for more than 50mm, so that the shielding layer of the lead can be clamped and fixed by the insulating layer 7 of the lead and the outer sheath 9, and the inner conductor cannot retreat due to external force; the outer sheath 9 and the shielding layer are trimmed by 5mm at the tail end of the wire, and then a 15mm heat-shrinkable tube 10 is sleeved to shrink the wire throwing tail end, so that the tail end of the wire is prevented from being reduced due to the effective clearance between the trimmed shielding layer and the wire core wire, and even from being in lap short circuit.

b. When a wire needs to be crimped at a vacant point but is not allowed to extend out of a tail cover of the component, a wire with the length of 50mm is crimped normally, after crimping, the inner conductor is checked to have no backward phenomenon, then the wire is trimmed to be not less than 10mm, meanwhile, the outer sheath 9 and the shielding layer are trimmed by 2-3mm, then the contact element is normally installed in a corresponding hole position of the component, the inner conductor is checked not to retreat in the whole installation process, then epoxy glue is filled in the tail cover of the component to fix the tail end of the wire, and the epoxy glue needs to exceed the tail end position of the wire.

In use, when the shielding coaxial contact element is processed, the shielding coaxial contact element is assembled with a component after a lead is pressed, and the performance of the shielding coaxial contact element is better than that of a product obtained by directly placing a hole in a vacant position or installing a sealing plug; the shielding coaxial contact element of the crimping wire can ensure the integrality of components and parts and the sealing effect of moisture protection and dust protection, and can prolong the service life of products under the same service environment.

Description of the drawings:

fig. 1 is a schematic diagram of a shielded coaxial contact.

Fig. 2 is a schematic view of a lead structure.

Fig. 3 is a schematic representation of the wire before trimming.

FIG. 4 is a schematic view after trimming of the wire

Fig. 5 is a schematic structural diagram of the present invention.

Detailed Description

As shown in fig. 1, the shielded coaxial contact is composed of an inner conductor 4, an outer conductor 5, a front end dielectric body 3, a tail dielectric body 2 and a crimp barrel 1. The structure of the lead is shown in fig. 2, and the core wire 6, the lead insulating layer 7, the shielding layer 8 and the outer sheath 9 are arranged in sequence from inside to outside.

A first assembling structure:

the lead core wire 6 is assembled with the inner conductor 4 of the shield coaxial contact by crimping, and the shield layer 8 of the lead is crimped between the crimp barrel 1 and the outer conductor 5, and the lead is retained for more than 50 mm.

The end of the wire has a 5mm length stripping outer sheath 9 and a shielding layer 8. And the tail end of the wire is wrapped by a 15mm heat shrinkable tube 10 in a heat shrinkable mode, so that the tail end of the wire is prevented from being reduced due to the effective clearance between the trimmed shielding layer 8 and the wire core wire 6 and even from being in lap short circuit.

The second assembling structure:

when a wire needs to be crimped at a vacant point but is not allowed to extend out of a tail cover of a component, a 50mm long wire is crimped normally according to an assembly structure, the inner conductor 4 is checked to have no backward phenomenon after crimping is finished, then the wire is trimmed and kept to be not less than 10mm in length, meanwhile, the outer sheath 9 and the shielding layer 8 are trimmed by 2-3mm, then a contact element is normally installed in a corresponding hole position of the component, the inner conductor 4 is checked to not move backward in the whole installation process, epoxy glue is filled in the tail cover of the component to fix the tail end of the wire, and the epoxy glue needs to exceed the tail end position of the wire.

Claims

1. An assembling structure of a shield coaxial contact and a wire, characterized in that: and the inner core wire of the lead and the inner conductor of the shielding coaxial contact element are assembled in a compression joint mode, the shielding layer of the lead is connected between the compression joint barrel and the outer conductor in a compression joint mode, the outer sheath and the shielding layer are stripped at the tail end of the lead, and the heat-shrinkable tube is sleeved for fixing the end.

2. The shield coaxial contact and conductor assembly structure of claim 1, wherein: the shielding coaxial contact element consists of an inner conductor, an outer conductor, a front end dielectric body, a tail dielectric body and a crimping barrel.

3. The shield coaxial contact and conductor assembly structure of claim 1, wherein: the wire comprises an inner core wire, an inner insulating layer, a shielding layer and an outer sheath from inside to outside in sequence.

4. The shield coaxial contact and conductor assembly structure of claim 1, wherein: the wire is retained for more than 50 mm.

5. The shield coaxial contact and conductor assembly structure of claim 4, wherein: the wire ends had a length of 5mm without an outer sheath and shielding.

6. The shield coaxial contact and conductor assembly structure of claim 5, wherein: the length of the heat-shrinkable tube is 15 mm.