CN106356689A - High-reliability and flotation-free BMA-K type connector - Google Patents

Abstract

The invention discloses a high-reliability and flotation-free BMA-K type connector. The high-reliability and flotation-free BMA-K type connector comprises a shell, an insertion pin component and a contact head, wherein a convex ring is arranged on the inner wall of the shell; the convex ring is provided with a first surface and a second surface; an insertion pin of the insertion pin component is mounted in an insulator; the insertion pin component and the insulator are together mounted at the head end of the shell; the insertion pin component leans on the first surface of the convex ring; the head end of the shell is closed by rolling and riveting, so that the insertion pin component and the insulator re fixed in the shell; the contact head is mounted at the tail of the shell; the contact head is separated from the second surface of the convex ring via a gasket; the tail of the contact head is fixed by a pressing sleeve; the tail of the shell is closed by rolling and riveting, so that the contact head and the pressing sleeve are fixed in the shell. The connector is applied to connection and transmission of radio-frequency signals; a flotation-free design is adopted; the insertion coaxiality is ensured; the reliability of a radio-frequency signal interconnection system is improved; the requirements on development of aerospace electronic equipment in small-sized, high-reliability and light-weight directions are met.

Description

A kind of highly reliable no floating bma-k type adapter

Technical field

The invention belongs to electronic information technical field, specifically a kind of highly reliable no floating bma-k type adapter.

Background technology

With communication technology, the developing by leaps and bounds of electronic technology, increasing electronic apparatus application in every field, first device Between the density of part and they, correlation function increasingly increases, therefore the dimensional accuracy to single components and parts, and linkage function will Seek more and more higher, do not require nothing more than standardization, and exigent reliability.Existing bma floating blind plugging type adapter has The advantages of small volume, contact reliability, mechanical electric apparatus superior performance, docking facilitate, but because its floatability structure can cause footpath Poor to centering, especially in bull to being inserted through journey radial alignment it is difficult to ensure that, easily cause reed insert split, contact pin torticollis etc. is asked Topic, reduces its reliability.

Content of the invention

The defect existing for prior art, the present invention provides a kind of highly reliable no floating bma-k type adapter, and reduction is penetrated The volume and weight of frequency adapter, improves reliability, meets space flight and aviation electronics towards miniaturization, high reliability, lightweight Change the demand that direction is developed.

The present invention adopts the following technical scheme that a kind of highly reliable no floating bma-k type adapter, including shell, pin groups Part and contact head, described outer casing inner wall has bulge loop, and bulge loop has the first face and the second face；The contact pin of contact pin component loads absolutely In edge, contact pin component is contained in shell head end together with insulator, and contact pin component is against on the first face of bulge loop, shell head end Roll riveting is closed up, thus contact pin component and insulator are fixed in shell；Contact head is contained in shell afterbody, contact head and bulge loop Pad is had to isolate between second face；The pressured set of contact head-tail is fixed, and shell afterbody roll riveting is closed up, thus by contact head and gland It is fixed in shell.

Radio frequency (RF) coaxial connector is a kind of coaxial transmission line, and one end is bma-k type adapter, and the other end is microstrip line.Two Hold and be adapted to after radio frequency connector and wiring board interconnection, connect to the equipment such as signal source, load or antenna.During energising work, Its outer conductor is grounded, and electric current passes through inner wire outer surface axial direction transmitting radio frequency signal, and it is a kind of distributed constant circuit, transmission Tem mould, its internal electric field all the time perpendicular to electric current transmission direction, its characteristic impedance z₀, can be calculated with formula (1):

$z_0=\frac{60\ln \frac{b}{a}}{\sqrt{{\mathrm{\ϵ}}_r}}\mathrm{...}\left(1\right)$

In formula (1), ε_rFor the relative dielectric constant of dielectric, a is inner conductor outer diameter, and b is outer conductor internal diameter.

The adapter of the present invention is used for the connection of radiofrequency signal and transmission, using no float design it is ensured that same when plugging together Axle degree, improves the reliability of radiofrequency signal interconnection system, meets space flight and aviation electronics towards miniaturization, high reliability, light The demand that matter direction is developed.The roll riveting of shell two ends, in order to fixing plug pin assembly and insulating supporting it is ensured that shell plates in roll riveting Layer gold does not fall off, and after Theoretical Calculation and test determine roll riveting, the fixing sexual satisfaction of product center contact requires.

Described contact head is made up of connection end and elastic tip, leans on the first fillet linking, institute between connection end and elastic tip The connection end stated and elastic tip are integrally formed, and connection end afterbody has 10 ° of taper hole；Described elastic tip is by the first cylindrical section, cone Platform section and the second cylindrical section composition, be connected by the second fillet and the 3rd fillet between the first cylindrical section and frustum section, frustum section and Second cylindrical end is directly connected to, axial direction several notches uniform in described elastic tip.Contact head is designed to overall structure, bullet The wall thickness at property end is designed to uniform sizes it is ensured that uniform wall thickness；Cylindrical section and frustum intersegmental employing round-corner transition, using beryllium-bronze Excellent precision turning machine-shaping, then with numerical control machining center milling otch；In the afterbody of contact head connection end, design one section 10 ° of taper hole, when connecting, outer cone section engagement corresponding with bma-j type adapter (standard component), and also the 3rd fillet is The axial diameter of lower is slightly less than the overall diameter of bma-j type adapter, connects in bma-k type adapter and the bma-j type of the present invention When connecing device and plugging together, the elastic tip of contact head can be strutted by bma-j, so that contact head elasticity is pressed on bma-j type adapter it is ensured that Under aerospace vibration condition, adapter outer conductor displacement very little (≤0.05mm) diametrically, improves the vibration resistance of contact head Can, the protection worse inner wire of intensity is injury-free simultaneously.

For being further ensured that resistance to shock under the conditions of aerospace for the contact head, the outer wall of the 3rd fillet of contact head increases Plus a reinforcing ring.The mechanics mode of operation of contact head script is cantilever beam, after increasing reinforcing ring, after adapter plugs together, Under aerospace vibration condition, become similar simple beam structure, further enhance its shock resistance.

On material selects, consider that environmental resistance is good, as far as possible using the used material of aerospace product, pin groups first The contact pin of part is processed using beraloy, and plated surface is firmly golden；Also it is cased with sheath outside contact pin component.In structure design, According to design calculating, analog simulation, complete product structure design.

Brief description

Fig. 1 is a kind of structural representation of highly reliable no floating bma-k type adapter of the present invention.

Fig. 2 is a kind of structural representation of the contact head of highly reliable no floating bma-k type adapter of the present invention.

Specific embodiment

Below in conjunction with the accompanying drawings embodiments of the invention are described specifically:

A kind of highly reliable no floating bma-k type adapter, as shown in figure 1, include shell 20, contact pin component 30 and contact head 50, shell 20 inwall has bulge loop 21, and bulge loop 21 has the first face 21a and the second face 21b；The contact pin 31 of contact pin component 30 adopts Beraloy processes, and plated surface is firmly golden, and contact pin 31 loads in insulator 10, and contact pin component 30 is together with insulator 10 It is contained in shell 20 head end, contact pin component 30 is against on the first face 21a of bulge loop 21, and contact pin component 30 afterbody is also cased with sheath 80, Shell 20 head end roll riveting is closed up, thus contact pin component 30 and insulator 10 are fixed in shell 20；Contact head 50 is contained in shell Pad 40 is had to isolate between second face 21b of 20 afterbodys, contact head 50 and bulge loop 21；Contact head 50 afterbody pressured set 70 is fixing, Shell 20 afterbody roll riveting is closed up, thus contact head 50 and gland 70 are fixed in shell 20.

Described contact head 50, as shown in Fig. 2 being made up of connection end 51 and elastic tip, leans between connection end 51 and elastic tip First fillet 52 is connected, and described connection end 51 and elastic tip are integrally formed, and connection end 51 afterbody has 10 ° of taper hole 59；Described Elastic tip be made up of the first cylindrical section 53, frustum section 56 and the second cylindrical section 57, between the first cylindrical section 53 and frustum section 56 It is connected by the second fillet 54 and the 3rd fillet 55, frustum section 56 is directly connected to the second cylindrical section 57, described elastic tip upper shaft To several notches 58 uniform.

For being further ensured that resistance to shock under the conditions of aerospace for the contact head 50, contact head 50 the 3rd fillet 55 outer One reinforcing ring 60 is cased with wall, the mechanics mode of operation of contact head 50 script is cantilever beam, after increasing reinforcing ring 60, is connecting After device plugs together, under aerospace vibration condition, become similar simple beam structure, further enhance its shock resistance.

The above, be only the specific embodiment of the present invention, not limitation of the present invention, those skilled in the art In the case of without departing from the technology of the present invention design principle, the change made using above-mentioned technology contents or modification, it is regarded as Belong to protection scope of the present invention.

Claims (4)

1. a kind of highly reliable no floating bma-k type adapter it is characterised in that: include shell, contact pin component and contact head, described Outer casing inner wall there is bulge loop, bulge loop has the first face and the second face；The contact pin of contact pin component loads in insulator, contact pin component It is contained in shell head end together with insulator, contact pin component is against on the first face of bulge loop, shell head end roll riveting is closed up, thus will Contact pin component and insulator are fixed in shell；Contact head is contained in shell afterbody, has pad between contact head and the second face of bulge loop Piece is isolated；The pressured set of contact head-tail is fixed, and shell afterbody roll riveting is closed up, thus contact head and gland are fixed in shell.

2. one kind according to claim 1 highly reliable no floating bma-k type adapter it is characterised in that: described contact Head is made up of connection end and elastic tip, leans on the first fillet linking, described connection end and elastic tip between connection end and elastic tip It is integrally formed, connection end afterbody has 10 ° of taper hole；Described elastic tip is by the first cylindrical section, frustum section and the second cylindrical section group Become, be connected by the second fillet and the 3rd fillet between the first cylindrical section and frustum section, frustum section is directly connected to the second cylindrical end, Axial direction several notches uniform in described elastic tip.

3. one kind according to claim 2 highly reliable no floating bma-k type adapter it is characterised in that: described the 3rd Reinforcing ring is also cased with the outer wall of fillet.

4. one kind according to any one of claim 1 to 3 highly reliable no floating bma-k type adapter it is characterised in that: Also it is cased with sheath outside contact pin component.