BMA type floating microstrip radio frequency coaxial connector

Abstract

The utility model relates to a BMA type floating microstrip radio frequency coaxial connector comprising a flange, a guide sleeve and a first insulator are fixed in the flange, and a microstrip is fixed in the first insulator; a shell, a guide contact head is fixed in the shell, a second insulator is fixed in the guide contact head, and an inner conductor is fixed in the second insulator; an interface lining and an interface contact head are arranged in the connecting cavity of the shell; when the shell is assembled in the flange, an axial floating gap and a radial floating gap are formed in a mounting cavity of the flange; the flange is provided with a compression screw sleeve, a spring is arranged between the shell and the flange, the guide sleeve and the guide contact head are in sliding contact fit, and the inner conductor is axially connected with the micro-strip in an inserted mode. The connector is suitable for usage occasions with small mounting plate spacing and multi-path plug-in, has the microstrip welding characteristic, and can transmit high-quality radio frequency signals.

Description

Technical Field

[0001] The utility model relates to the technical field of cable connectors, in particular to a BMA type floating microstrip radio frequency coaxial connector. Background Art

[0002] A connector is a mechanical component with electrical connection characteristics. Its main function is to provide electrical connection and signal transmission between various interfaces. It is one of the essential basic components for the electrical connection of the entire circuit system.

[0003] With the continuous development of military RF connector products, the degree of modularization, integration and density of products is getting higher and higher. Microstrip connectors, push-in connectors and floating connectors are widely used in the modular interconnection of subsystems in the whole system of electronics, communications and other fields.

[0004] At present, as one of the commonly used connectors on the market, BMA type connector has the characteristics of wide frequency band, large power capacity, suitable for blind mating, quick separation or connection, etc. However, the current BMA type connector requires a larger installation spacing and is not suitable for small space, high-density installation, modularization and other usage occasions. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art, to provide a BMA type floating microstrip radio frequency coaxial connector, and to solve the technical problem that the previous BMA type connector is not suitable for small space, high density installation, and modularization.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A BMA type floating microstrip radio frequency coaxial connector is provided, comprising:

[0008] A flange, in which a guide sleeve and a first insulator are fixed, and in which a microstrip is fixed;

[0009] A shell, a guide contact head is fixed in the shell, a second insulator is fixed in the guide contact head, and an inner conductor is fixed in the second insulator; an interface bushing and an interface contact head are arranged in the connection cavity of the shell, and the inner conductor extends into the interface contact head;

[0010] When the shell is assembled in the flange, it has axial and radial floating clearances in the installation cavity of the flange; a clamping screw sleeve is arranged on the flange, and the clamping screw sleeve abuts against the shell to limit the shell in the flange; a spring is arranged between the shell and the flange, the guide sleeve forms a sliding contact fit with the guide contact head, and the inner conductor is axially plugged into the microstrip.

[0011] Furthermore, one end of the interface contact head is in contact with the housing, and the other end of the interface contact head is provided with a plurality of slots, each slot being circumferentially distributed on the interface contact head, so that the interface contact head is suitable for radial elastic deformation and plugging with a corresponding connector of a standard interface;

[0012] The outer end of the interface bushing is riveted and fixed to the shell, and the inner end of the interface bushing axially abuts against the interface contact head. The outer port of the interface bushing is provided with an introduction slope to correspond to the insertion and alignment of the connector, and a radial groove is provided in the interface bushing to radially limit the slotted introduction end of the interface contact head.

[0013] Furthermore, an inner tooth washer is arranged in the connection cavity of the shell, and the inner tooth washer is located at the bottom of the connection cavity. The interface contact head abuts against the inner tooth washer. The inner side of the inner tooth washer has a plurality of tooth-like protrusions which are evenly distributed circumferentially for axial elastic contact connection between the interface outer conductors.

[0014] Furthermore, the inner conductor and the jack end of the microstrip are both provided with slots, each of which is evenly distributed around the circumference, so that the jack end serves as a radial elastic contact piece.

[0015] Furthermore, barbs are provided on the outer circumferences of the inner conductor and the microstrip to fix the inner conductor and the microstrip in the insulator.

[0016] Furthermore, the plug end of the guide contact head is provided with slots, which are evenly distributed around the circumference so that the plug end can serve as a radial elastic contact piece;

[0017] A positioning surface is arranged on the guide contact head, and the positioning surface is suitable for axially abutting with the guide sleeve to limit the axial floating amount.

[0018] Furthermore, the insertion hole of the guide sleeve forms a guiding inclined surface.

[0019] Furthermore, an interference fit is formed between the guide sleeve and the flange.

[0020] Furthermore, an interference fit is formed between the guide contact head and the housing.

[0021] Furthermore, the radial floating amount of the shell is ±0.15 mm, and the axial floating amount is less than 1 mm.

[0022] The beneficial effects of the utility model are:

[0023] The BMA type floating microstrip radio frequency coaxial connector of the utility model is suitable for the occasions where the spacing between mounting plates is small and multiple paths are plugged in, and has the microstrip welding characteristics and transmits high-quality radio frequency signals.

[0024] The springs and the slots on the inner conductor, microstrip and guide contact head ensure that the connector can achieve elastic connection and electrical continuity during the conductive contact process to ensure high-quality signal transmission; a certain eccentric offset is allowed during installation to ensure reliable connection of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the BMA type floating microstrip radio frequency coaxial connector of the utility model;

[0027] Figure 2 It is the coordination diagram between the inner conductor and the microstrip;

[0028] Figure 3 It is a schematic diagram of the housing cooperating with the guide sleeve via the guide contact head;

[0029] Figure 4 It is the matching diagram between the housing and the flange;

[0030] Among them, 1, flange, 21, guide sleeve, 22, guide contact head;

[0031] 31. first insulator, 32. second insulator;

[0032] 4. Shell;

[0033] 51. interface contact head, 52. interface bushing, 53. internal tooth washer;

[0034] 6. Press the screw sleeve;

[0035] 7. Spring;

[0036] 81, inner conductor, 82, microstrip, 83, barb;

[0037] 9. Grooving. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] The present application provides a BMA type floating microstrip RF coaxial connector, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0040] In order to solve the technical problem that the BMA type connector in the prior art is not suitable for small space, high density installation, and modularization, an embodiment of the present application provides a BMA type floating microstrip RF coaxial connector, which is described in detail below.

[0041] like Figures 1 to 4 As shown, a BMA type floating microstrip RF coaxial connector includes

[0042] A flange 1, in which a guide sleeve 21 and a first insulator 31 are fixed, and in which a microstrip 82 is fixed;

[0043] A housing 4, wherein a guide contact 22 is fixed in the housing 4, a second insulator 32 is fixed in the guide contact 22, and an inner conductor 81 is fixed in the second insulator 32; an interface bushing 52 and an interface contact 51 are arranged in the connection cavity of the housing 4, and the inner conductor 81 extends into the interface contact 51;

[0044] When the shell 4 is assembled in the flange 1, it has axial and radial floating clearances in the installation cavity of the flange 1; a clamping nut 6 is provided on the flange 1, and the clamping nut 6 abuts against the shell 4 to limit the shell 4 in the flange 1; a spring 7 is provided between the shell 4 and the flange 1, the guide sleeve 21 forms a sliding contact fit with the guide contact head 22, and the inner conductor 81 is axially plugged into the microstrip 82.

[0045] Specifically, as an optional implementation in this embodiment, Figures 1 to 3 As shown,

[0046] One end of the interface contact head 51 is in contact with the housing 4, and the other end of the interface contact head 51 is provided with a plurality of slots 9, each slot 9 being circumferentially distributed on the interface contact head 51, so that the interface contact head 51 is suitable for radial elastic deformation and plugging with a corresponding connector of a standard interface;

[0047] The outer end of the interface bushing 52 is riveted and fixed to the outer shell 4, and the inner end of the interface bushing 52 axially abuts against the interface contact head 51. The outer port of the interface bushing 52 is provided with an introduction slope to correspond to the insertion guide of the connector, and a radial groove is provided inside the interface bushing 52 to radially limit the introduction end of the slot 9 of the interface contact head 51.

[0048] Specifically, as an optional implementation in this embodiment, Figures 1 to 3 As shown, an inner tooth washer 53 is arranged in the connection cavity of the shell 4, and the inner tooth washer 53 is located at the bottom of the connection cavity. The interface contact head 51 abuts against the inner tooth washer 53. The inner side of the inner tooth washer 53 has a plurality of tooth-like protrusions that are evenly distributed circumferentially for axial elastic contact connection between the interface outer conductors.

[0049] Specifically, as an optional implementation in this embodiment, Figure 2 As shown, the jack ends of the inner conductor 81 and the microstrip 82 are both provided with slots 9, which are evenly distributed around the circumference so that the jack ends serve as radial elastic contacts.

[0050] Specifically, as an optional implementation in this embodiment, Figure 2 As shown, barbs 83 are provided on the outer circumferences of the inner conductor 81 and the microstrip 82 to fix the inner conductor 81 and the microstrip 82 in the insulator.

[0051] Specifically, a positioning surface is further provided on the inner conductor 81 , and the positioning surface abuts against the end surface of the second insulator 32 . The inner conductor 81 is limited in position on the second insulator 32 by the positioning surface and the barbs 83 .

[0052] Specifically, as an optional implementation in this embodiment, Figures 1 to 3 As shown, the plug end of the guide contact head 22 is provided with slots 9, and the slots 9 are evenly distributed around the circumference so that the plug end can serve as a radial elastic contact piece;

[0053] The guide contact head 22 is provided with a positioning surface, and the positioning surface is suitable for axially abutting with the guide sleeve 21 to limit the axial floating amount.

[0054] In this embodiment, the insertion hole of the guide sleeve 21 forms a guiding inclined surface.

[0055] In this embodiment, an interference fit is formed between the guide sleeve 21 and the flange 1 .

[0056] In this embodiment, an interference fit is formed between the guide contact head 22 and the housing 4 .

[0057] In this embodiment, the inner conductor 81, the interface contact head 51, the inner tooth washer 53 and the guide contact head 22 are made of beryllium bronze.

[0058] In this embodiment, the microstrip 82 is used for printed circuit board welding.

[0059] In this embodiment, both insulators are made of polytetrafluoroethylene, which plays a supporting role, maintains the coaxiality of the inner and outer conductors, and can withstand the heat of the microstrip 82.

[0060] In this embodiment, during operation of the connector, the pin at the right end of the inner conductor 81 and the jack of the microstrip 82 are always in a meshing contact state, which can ensure the electrical continuity of the outer conductor and the coaxiality of the outer conductor.

[0061] In this embodiment, the compression screw sleeve 6 and the flange 1 are fixed by threaded connection, and conductive glue is applied on the threads to increase the connection reliability.

[0062] In this embodiment, the outer cylindrical boss of the compression screw sleeve 6 is provided with opposite side planes for mounting a wrench for positioning and tightening.

[0063] like Figure 4 As shown, in this embodiment, the inner hole of the shell 4 is provided with a positioning surface, which is used to limit the axial position of the guide contact head 22, and the inner hole of the flange 1 is provided with a positioning surface, which is used to limit the axial position of the first insulator 31.

[0064] In this embodiment, the radial floating amount of the housing 4 is ±0.15mm, and the axial floating amount is less than 1mm. When the axial floating amount is the largest, the total length of the outer conductor can be reduced to 14mm, which is suitable for occasions where the spacing between mounting plates is small and multiple channels are plugged in. At the same time, it has the welding characteristics of microstrip 82 to ensure high-quality signal transmission.

[0065] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0066] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0068] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0069] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0070] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0071] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A BMA type floating microstrip RF coaxial connector, characterized in that: include A flange (1), a guide sleeve (21) and a first insulator (31) being fixed inside the flange (1), and a microstrip (82) being fixed inside the first insulator (31); A shell (4), a guide contact head (22) is fixed in the shell (4), a second insulator (32) is fixed in the guide contact head (22), and an inner conductor (81) is fixed in the second insulator (32); an interface bushing (52) and an interface contact head (51) are arranged in the connection cavity of the shell (4), and the inner conductor (81) extends into the interface contact head (51); When the shell (4) is assembled in the flange (1), it has axial and radial floating clearances in the installation cavity of the flange (1); a clamping screw sleeve (6) is arranged on the flange (1), and the clamping screw sleeve (6) abuts against the shell (4) to restrict the shell (4) in the flange (1); a spring (7) is arranged between the shell (4) and the flange (1); the guide sleeve (21) and the guide contact head (22) form a sliding contact fit, and the inner conductor (81) and the microstrip (82) are axially plugged.

2. The BMA type floating microstrip RF coaxial connector according to claim 1 is characterized in that: One end of the interface contact head (51) is in contact with the housing (4), and the other end of the interface contact head (51) is provided with a plurality of slots (9), each slot (9) being distributed circumferentially on the interface contact head (51), so that the interface contact head (51) is suitable for radial elastic deformation and can be plugged with a corresponding connector of a standard interface; The outer end of the interface bushing (52) is fixed to the housing (4) by riveting, and the inner end of the interface bushing (52) is axially abutted against the interface contact head (51). The outer port of the interface bushing (52) is provided with an introduction bevel to correspond to the insertion and alignment of the connector, and a radial groove is provided inside the interface bushing (52) to radially limit the slotted introduction end of the interface contact head (51).

3. The BMA type floating microstrip RF coaxial connector according to claim 2 is characterized in that: An inner tooth washer (53) is arranged in the connection cavity of the housing (4), the inner tooth washer (53) is located at the cavity bottom of the connection cavity, the interface contact head (51) abuts against the inner tooth washer (53), and the inner side of the inner tooth washer (53) has a plurality of tooth-like protrusions which are evenly distributed around the circumference and are used for axial elastic contact connection between the interface outer conductors.

4. The BMA type floating microstrip RF coaxial connector according to claim 2 is characterized in that: The jack ends of the inner conductor (81) and the microstrip (82) are both provided with slots (9), which are evenly distributed around the circumference so that the jack ends serve as radial elastic contacts.

5. The BMA type floating microstrip RF coaxial connector according to claim 2, characterized in that: Barbs (83) are provided on the outer circumferences of the inner conductor (81) and the microstrip (82) so as to fix the inner conductor (81) and the microstrip (82) in the insulator.

6. The BMA type floating microstrip RF coaxial connector according to claim 1, characterized in that: The plug end of the guide contact head (22) is provided with slots (9), and the slots (9) are evenly distributed around the circumference so that the plug end can serve as a radial elastic contact piece; A positioning surface is arranged on the guide contact head (22), and the positioning surface is suitable for axially abutting against the guide sleeve (21) to limit the axial floating amount.

7. The BMA type floating microstrip RF coaxial connector according to claim 1, characterized in that: The insertion hole of the guide sleeve (21) forms a guiding inclined surface.

8. The BMA type floating microstrip RF coaxial connector according to claim 1, characterized in that: An interference fit is formed between the guide sleeve (21) and the flange (1).

9. The BMA type floating microstrip RF coaxial connector according to claim 1, characterized in that: An interference fit is formed between the guide contact head (22) and the housing (4).

10. The BMA type floating microstrip RF coaxial connector according to claim 1, characterized in that: The radial floating amount of the housing (4) is ±0.15 mm, and the axial floating amount is less than 1 mm.

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